Bump version numbers for 1.4.5 release.

Fix required manual tests

See merge request briar/briar!1588

.gitlab-ci.yml

@@ -32,9 +32,9 @@ test:
   extends: .base-test
   stage: test
   script:
-    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom animalSnifferMain animalSnifferTest
-    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom :briar-headless:linuxJars
-    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom compileOfficialDebugAndroidTestSources compileScreenshotDebugAndroidTestSources check
+    - ./gradlew -Djava.security.egd=file:/dev/urandom animalSnifferMain animalSnifferTest
+    - ./gradlew -Djava.security.egd=file:/dev/urandom assembleOfficialDebug :briar-headless:linuxJars
+    - ./gradlew -Djava.security.egd=file:/dev/urandom compileOfficialDebugAndroidTestSources compileScreenshotDebugAndroidTestSources check
   rules:
     - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
       when: always
@@ -62,7 +62,7 @@ android test:
     when: on_failure
   rules:
     - if: '$CI_PIPELINE_SOURCE == "schedule"'
-      when: on_success
+      when: manual
     - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
       changes:
         - briar-android/**/*
@@ -85,35 +85,42 @@ test_reproducible:
 
 .optional_tests:
   stage: optional_tests
-  before_script:
-    - set -e
-    - export GRADLE_USER_HOME=$PWD/.gradle
-
-  cache:
-    key: "$CI_COMMIT_REF_SLUG"
-    paths:
-      - .gradle/wrapper
-      - .gradle/caches
-
-  script:
-    - OPTIONAL_TESTS=org.briarproject.bramble.plugin.tor.BridgeTest ./gradlew --info bramble-java:test --tests BridgeTest
-
-  after_script:
-    # these file change every time but should not be cached
-    - rm -f $GRADLE_USER_HOME/caches/modules-2/modules-2.lock
-    - rm -fr $GRADLE_USER_HOME/caches/*/plugin-resolution/
+  extends: .base-test
 
 bridge test:
   extends: .optional_tests
   rules:
     - if: '$CI_PIPELINE_SOURCE == "schedule"'
       when: on_success
-      allow_failure: true
+      allow_failure: false
     - if: '$CI_COMMIT_TAG == null'
       when: manual
       allow_failure: true
+  script:
+    - OPTIONAL_TESTS=org.briarproject.bramble.plugin.tor.BridgeTest ./gradlew --info bramble-java:test --tests BridgeTest
+
+mailbox integration test:
+  extends: .optional_tests
+  rules:
+    - if: '$CI_PIPELINE_SOURCE == "schedule"'
+      when: on_success
+    - if: '$CI_COMMIT_TAG == null'
+      when: manual
+      allow_failure: true # TODO figure out how not to allow failure while leaving this optional
+  script:
+    # start mailbox
+    - cd /opt && git clone --depth 1 https://code.briarproject.org/briar/briar-mailbox.git briar-mailbox
+    - cd briar-mailbox
+    - mkdir -p /root/.local/share # create directory that mailbox (currently) expects to exist
+    - ./gradlew run --args="--debug --setup-token 54686973206973206120736574757020746f6b656e20666f722042726961722e" &
+    # run mailbox integration test once mailbox has started
+    - cd "$CI_PROJECT_DIR"
+    - bramble-core/src/test/bash/wait-for-mailbox.sh
+    - OPTIONAL_TESTS=org.briarproject.bramble.mailbox.MailboxIntegrationTest ./gradlew --info bramble-core:test --tests MailboxIntegrationTest
 
 pre_release_tests:
   extends: .optional_tests
+  script:
+    - OPTIONAL_TESTS=org.briarproject.bramble.plugin.tor.BridgeTest ./gradlew --info bramble-java:test --tests BridgeTest
   only:
     - tags

README.md

@@ -22,6 +22,15 @@ our site.
 
 [Wiki](https://code.briarproject.org/briar/briar/-/wikis/home)
 
+## Reproducible builds
+
+We provide [docker images](https://code.briarproject.org/briar/briar-reproducer#briar-reproducer)
+to ease the task of verifying that the published APK binaries
+include nothing but our publicly available source code.
+
+You can either use those images or use them as a blueprint to build your own environment
+for reproduction.
+
 ## Donate
 
 [![Donate using Liberapay](https://briarproject.org/img/liberapay.svg)](https://liberapay.com/Briar/donate) [![Flattr this](https://briarproject.org/img/flattr-badge-large.png "Flattr this")](https://flattr.com/t/592836/)   

bramble-android/build.gradle

@@ -15,8 +15,8 @@ android {
 	defaultConfig {
 		minSdkVersion 16
 		targetSdkVersion 30
-		versionCode 10403
-		versionName "1.4.3"
+		versionCode 10405
+		versionName "1.4.5"
 		consumerProguardFiles 'proguard-rules.txt'
 
 		testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
@@ -53,7 +53,7 @@ dependencies {
 	testImplementation "junit:junit:$junit_version"
 	testImplementation "org.jmock:jmock:$jmock_version"
 	testImplementation "org.jmock:jmock-junit4:$jmock_version"
-	testImplementation "org.jmock:jmock-legacy:$jmock_version"
+	testImplementation "org.jmock:jmock-imposters:$jmock_version"
 }
 
 def torBinariesDir = 'src/main/res/raw'

bramble-android/proguard-rules.txt

@@ -1,6 +1,8 @@
--keep,includedescriptorclasses class org.briarproject.** { *; }
-
--keep class org.h2.** { *; }
+# Keep the H2 classes that are loaded via reflection
+-keep class org.h2.Driver { *; }
+-keep class org.h2.engine.Engine { *; }
+-keep class org.h2.store.fs.** { *; }
+# Don't warn about unused dependencies of H2 classes
 -dontwarn org.h2.**
 -dontnote org.h2.**
 
@@ -15,5 +17,4 @@
 -dontwarn sun.misc.Unsafe
 -dontnote com.google.common.**
 
-# UPnP library isn't used
--dontwarn org.bitlet.weupnp.**
+-dontwarn com.fasterxml.jackson.databind.ext.Java7SupportImpl

bramble-android/src/test/java/org/briarproject/bramble/account/AndroidAccountManagerTest.java

@@ -9,7 +9,7 @@ import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.jmock.Expectations;
-import org.jmock.lib.legacy.ClassImposteriser;
+import org.jmock.imposters.ByteBuddyClassImposteriser;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -44,7 +44,7 @@ public class AndroidAccountManagerTest extends BrambleMockTestCase {
 	private AndroidAccountManager accountManager;
 
 	public AndroidAccountManagerTest() {
-		context.setImposteriser(ClassImposteriser.INSTANCE);
+		context.setImposteriser(ByteBuddyClassImposteriser.INSTANCE);
 		app = context.mock(Application.class);
 		applicationInfo = new ApplicationInfo();
 		applicationInfo.dataDir = testDir.getAbsolutePath();

bramble-api/build.gradle

@@ -9,11 +9,11 @@ apply from: 'witness.gradle'
 dependencies {
 	implementation "com.google.dagger:dagger:$dagger_version"
 	implementation 'com.google.code.findbugs:jsr305:3.0.2'
+	implementation "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
 
 	testImplementation "junit:junit:$junit_version"
 	testImplementation "org.jmock:jmock:$jmock_version"
 	testImplementation "org.jmock:jmock-junit4:$jmock_version"
-	testImplementation "org.jmock:jmock-legacy:$jmock_version"
 
 	signature 'org.codehaus.mojo.signature:java16:1.1@signature'
 }

bramble-api/src/main/java/org/briarproject/bramble/api/FeatureFlags.java

@@ -10,4 +10,12 @@ public interface FeatureFlags {
 	boolean shouldEnableProfilePictures();
 
 	boolean shouldEnableDisappearingMessages();
+
+	boolean shouldEnableMailbox();
+
+	boolean shouldEnablePrivateGroupsInCore();
+
+	boolean shouldEnableForumsInCore();
+
+	boolean shouldEnableBlogsInCore();
 }

bramble-api/src/main/java/org/briarproject/bramble/api/WeakSingletonProvider.java

@@ -1,4 +1,4 @@
-package org.briarproject.briar.feed;
+package org.briarproject.bramble.api;
 
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
@@ -13,7 +13,7 @@ import javax.inject.Provider;
  * collected.
  */
 @NotNullByDefault
-abstract class WeakSingletonProvider<T> implements Provider<T> {
+public abstract class WeakSingletonProvider<T> implements Provider<T> {
 
 	private final Object lock = new Object();
 	@GuardedBy("lock")
@@ -31,5 +31,5 @@ abstract class WeakSingletonProvider<T> implements Provider<T> {
 		}
 	}
 
-	abstract T createInstance();
+	public abstract T createInstance();
 }

bramble-api/src/main/java/org/briarproject/bramble/api/contact/ContactManager.java

@@ -113,6 +113,26 @@ public interface ContactManager {
 	 */
 	String getHandshakeLink(Transaction txn) throws DbException;
 
+	/**
+	 * Creates a {@link PendingContact} from the given handshake link and
+	 * alias, adds it to the database and returns it.
+	 *
+	 * @param link The handshake link received from the pending contact
+	 * @param alias The alias the user has given this pending contact
+	 * @throws UnsupportedVersionException If the link uses a format version
+	 * that is not supported
+	 * @throws FormatException If the link is invalid
+	 * @throws GeneralSecurityException If the pending contact's handshake
+	 * public key is invalid
+	 * @throws ContactExistsException If a contact with the same handshake
+	 * public key already exists
+	 * @throws PendingContactExistsException If a pending contact with the same
+	 * handshake public key already exists
+	 */
+	PendingContact addPendingContact(Transaction txn, String link, String alias)
+			throws DbException, FormatException, GeneralSecurityException,
+			ContactExistsException, PendingContactExistsException;
+
 	/**
 	 * Creates a {@link PendingContact} from the given handshake link and
 	 * alias, adds it to the database and returns it.
@@ -146,11 +166,24 @@ public interface ContactManager {
 	Collection<Pair<PendingContact, PendingContactState>> getPendingContacts()
 			throws DbException;
 
+	/**
+	 * Returns a list of {@link PendingContact PendingContacts} and their
+	 * {@link PendingContactState states}.
+	 */
+	Collection<Pair<PendingContact, PendingContactState>> getPendingContacts(Transaction txn)
+			throws DbException;
+
 	/**
 	 * Removes a {@link PendingContact}.
 	 */
 	void removePendingContact(PendingContactId p) throws DbException;
 
+	/**
+	 * Removes a {@link PendingContact}.
+	 */
+	void removePendingContact(Transaction txn, PendingContactId p)
+			throws DbException;
+
 	/**
 	 * Returns the contact with the given ID.
 	 */

bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/InvalidMailboxIdException.java

@@ -0,0 +1,8 @@
+package org.briarproject.bramble.api.mailbox;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+@NotNullByDefault
+public class InvalidMailboxIdException extends Exception {
+
+}

bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxAuthToken.java

@@ -0,0 +1,24 @@
+package org.briarproject.bramble.api.mailbox;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import javax.annotation.Nullable;
+import javax.annotation.concurrent.ThreadSafe;
+
+@ThreadSafe
+@NotNullByDefault
+public class MailboxAuthToken extends MailboxId {
+	public MailboxAuthToken(byte[] id) {
+		super(id);
+	}
+
+	/**
+	 * Creates a {@link MailboxAuthToken} from the given string.
+	 *
+	 * @throws InvalidMailboxIdException if token is not valid.
+	 */
+	public static MailboxAuthToken fromString(@Nullable String token)
+			throws InvalidMailboxIdException {
+		return new MailboxAuthToken(bytesFromString(token));
+	}
+}

bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxFileId.java

@@ -0,0 +1,24 @@
+package org.briarproject.bramble.api.mailbox;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import javax.annotation.Nullable;
+import javax.annotation.concurrent.ThreadSafe;
+
+@ThreadSafe
+@NotNullByDefault
+public class MailboxFileId extends MailboxId {
+	public MailboxFileId(byte[] id) {
+		super(id);
+	}
+
+	/**
+	 * Creates a {@link MailboxFileId} from the given string.
+	 *
+	 * @throws IllegalArgumentException if token is not valid.
+	 */
+	public static MailboxFileId fromString(@Nullable String token)
+			throws InvalidMailboxIdException {
+		return new MailboxFileId(bytesFromString(token));
+	}
+}

bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxFolderId.java

@@ -0,0 +1,24 @@
+package org.briarproject.bramble.api.mailbox;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import javax.annotation.Nullable;
+import javax.annotation.concurrent.ThreadSafe;
+
+@ThreadSafe
+@NotNullByDefault
+public class MailboxFolderId extends MailboxId {
+	public MailboxFolderId(byte[] id) {
+		super(id);
+	}
+
+	/**
+	 * Creates a {@link MailboxFolderId} from the given string.
+	 *
+	 * @throws IllegalArgumentException if token is not valid.
+	 */
+	public static MailboxFolderId fromString(@Nullable String token)
+			throws InvalidMailboxIdException {
+		return new MailboxFolderId(bytesFromString(token));
+	}
+}

bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxId.java

@@ -0,0 +1,49 @@
+package org.briarproject.bramble.api.mailbox;
+
+import com.fasterxml.jackson.annotation.JsonValue;
+
+import org.briarproject.bramble.api.UniqueId;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import java.util.Locale;
+
+import javax.annotation.Nullable;
+import javax.annotation.concurrent.ThreadSafe;
+
+import static org.briarproject.bramble.util.StringUtils.fromHexString;
+import static org.briarproject.bramble.util.StringUtils.toHexString;
+
+@ThreadSafe
+@NotNullByDefault
+public abstract class MailboxId extends UniqueId {
+	MailboxId(byte[] id) {
+		super(id);
+	}
+
+	/**
+	 * Returns valid {@link MailboxId} bytes from the given string.
+	 *
+	 * @throws InvalidMailboxIdException if token is not valid.
+	 */
+	static byte[] bytesFromString(@Nullable String token)
+			throws InvalidMailboxIdException {
+		if (token == null || token.length() != 64) {
+			throw new InvalidMailboxIdException();
+		}
+		try {
+			return fromHexString(token);
+		} catch (IllegalArgumentException e) {
+			throw new InvalidMailboxIdException();
+		}
+	}
+
+	/**
+	 * Returns the string representation expected by the mailbox API.
+	 * Also used for serialization.
+	 */
+	@Override
+	@JsonValue
+	public String toString() {
+		return toHexString(getBytes()).toLowerCase(Locale.US);
+	}
+}

bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxManager.java

@@ -0,0 +1,35 @@
+package org.briarproject.bramble.api.mailbox;
+
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.db.Transaction;
+
+import javax.annotation.Nullable;
+
+public interface MailboxManager {
+
+	/**
+	 * @return true if a mailbox is already paired.
+	 */
+	boolean isPaired(Transaction txn) throws DbException;
+
+	/**
+	 * @return the current status of the mailbox.
+	 */
+	MailboxStatus getMailboxStatus(Transaction txn) throws DbException;
+
+	/**
+	 * Returns the currently running pairing task,
+	 * or null if no pairing task is running.
+	 */
+	@Nullable
+	MailboxPairingTask getCurrentPairingTask();
+
+	/**
+	 * Starts and returns a pairing task. If a pairing task is already running,
+	 * it will be returned and the argument will be ignored.
+	 *
+	 * @param qrCodePayload The ISO-8859-1 encoded bytes of the mailbox QR code.
+	 */
+	MailboxPairingTask startPairingTask(String qrCodePayload);
+
+}

bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxPairingState.java

@@ -0,0 +1,59 @@
+package org.briarproject.bramble.api.mailbox;
+
+import javax.annotation.Nullable;
+
+public abstract class MailboxPairingState {
+
+	/**
+	 * The QR code payload that was scanned by the user.
+	 * This is null if the code should not be re-used anymore in this state.
+	 */
+	@Nullable
+	public final String qrCodePayload;
+
+	MailboxPairingState(@Nullable String qrCodePayload) {
+		this.qrCodePayload = qrCodePayload;
+	}
+
+	public static class QrCodeReceived extends MailboxPairingState {
+		public QrCodeReceived(String qrCodePayload) {
+			super(qrCodePayload);
+		}
+	}
+
+	public static class Pairing extends MailboxPairingState {
+		public Pairing(String qrCodePayload) {
+			super(qrCodePayload);
+		}
+	}
+
+	public static class Paired extends MailboxPairingState {
+		public Paired() {
+			super(null);
+		}
+	}
+
+	public static class InvalidQrCode extends MailboxPairingState {
+		public InvalidQrCode() {
+			super(null);
+		}
+	}
+
+	public static class MailboxAlreadyPaired extends MailboxPairingState {
+		public MailboxAlreadyPaired() {
+			super(null);
+		}
+	}
+
+	public static class ConnectionError extends MailboxPairingState {
+		public ConnectionError(String qrCodePayload) {
+			super(qrCodePayload);
+		}
+	}
+
+	public static class UnexpectedError extends MailboxPairingState {
+		public UnexpectedError(String qrCodePayload) {
+			super(qrCodePayload);
+		}
+	}
+}

bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxPairingTask.java

@@ -0,0 +1,21 @@
+package org.briarproject.bramble.api.mailbox;
+
+import org.briarproject.bramble.api.Consumer;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+@NotNullByDefault
+public interface MailboxPairingTask extends Runnable {
+
+	/**
+	 * Adds an observer to the task. The observer will be notified on the
+	 * event thread of the current state of the task and any subsequent state
+	 * changes.
+	 */
+	void addObserver(Consumer<MailboxPairingState> observer);
+
+	/**
+	 * Removes an observer from the task.
+	 */
+	void removeObserver(Consumer<MailboxPairingState> observer);
+
+}

bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxProperties.java

@@ -8,21 +8,22 @@ import javax.annotation.concurrent.Immutable;
 @NotNullByDefault
 public class MailboxProperties {
 
-	private final String onionAddress, authToken;
+	private final String baseUrl;
+	private final MailboxAuthToken authToken;
 	private final boolean owner;
 
-	public MailboxProperties(String onionAddress, String authToken,
+	public MailboxProperties(String baseUrl, MailboxAuthToken authToken,
 			boolean owner) {
-		this.onionAddress = onionAddress;
+		this.baseUrl = baseUrl;
 		this.authToken = authToken;
 		this.owner = owner;
 	}
 
-	public String getOnionAddress() {
-		return onionAddress;
+	public String getBaseUrl() {
+		return baseUrl;
 	}
 
-	public String getAuthToken() {
+	public MailboxAuthToken getAuthToken() {
 		return authToken;
 	}
 

bramble-api/src/test/java/org/briarproject/bramble/test/TestUtils.java

@@ -25,7 +25,11 @@ import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.util.IoUtils;
 
+import java.io.ByteArrayOutputStream;
 import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -45,6 +49,7 @@ import static org.briarproject.bramble.api.properties.TransportPropertyConstants
 import static org.briarproject.bramble.api.sync.ClientId.MAX_CLIENT_ID_LENGTH;
 import static org.briarproject.bramble.api.sync.SyncConstants.MAX_GROUP_DESCRIPTOR_LENGTH;
 import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_BODY_LENGTH;
+import static org.briarproject.bramble.util.IoUtils.copyAndClose;
 import static org.briarproject.bramble.util.StringUtils.getRandomString;
 
 public class TestUtils {
@@ -209,6 +214,24 @@ public class TestUtils {
 				getAgreementPublicKey(), verified);
 	}
 
+	public static void writeBytes(File file, byte[] bytes)
+			throws IOException {
+		FileOutputStream outputStream = new FileOutputStream(file);
+		//noinspection TryFinallyCanBeTryWithResources
+		try {
+			outputStream.write(bytes);
+		} finally {
+			outputStream.close();
+		}
+	}
+
+	public static byte[] readBytes(File file) throws IOException {
+		ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+		FileInputStream inputStream = new FileInputStream(file);
+		copyAndClose(inputStream, outputStream);
+		return outputStream.toByteArray();
+	}
+
 	public static double getMedian(Collection<? extends Number> samples) {
 		int size = samples.size();
 		if (size == 0) throw new IllegalArgumentException();

bramble-core/build.gradle

@@ -10,13 +10,18 @@ apply from: '../dagger.gradle'
 
 dependencies {
 	implementation project(path: ':bramble-api', configuration: 'default')
-	implementation 'org.bouncycastle:bcprov-jdk15on:1.69'
+	implementation 'org.bouncycastle:bcprov-jdk15to18:1.70'
+	//noinspection GradleDependency
 	implementation 'com.h2database:h2:1.4.192' // The last version that supports Java 1.6
 	implementation 'org.bitlet:weupnp:0.1.4'
 	implementation 'net.i2p.crypto:eddsa:0.2.0'
 	implementation 'org.whispersystems:curve25519-java:0.5.0'
 	implementation 'org.briarproject:jtorctl:0.3'
 
+	//noinspection GradleDependency
+	implementation "com.squareup.okhttp3:okhttp:$okhttp_version"
+	implementation "com.fasterxml.jackson.core:jackson-databind:$jackson_version"
+
 	annotationProcessor "com.google.dagger:dagger-compiler:$dagger_version"
 
 	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
@@ -25,7 +30,8 @@ dependencies {
 	testImplementation "junit:junit:$junit_version"
 	testImplementation "org.jmock:jmock:$jmock_version"
 	testImplementation "org.jmock:jmock-junit4:$jmock_version"
-	testImplementation "org.jmock:jmock-legacy:$jmock_version"
+	testImplementation "org.jmock:jmock-imposters:$jmock_version"
+	testImplementation "com.squareup.okhttp3:mockwebserver:4.9.3"
 
 	testAnnotationProcessor "com.google.dagger:dagger-compiler:$dagger_version"
 

bramble-core/src/main/java/org/briarproject/bramble/contact/ContactManagerImpl.java

@@ -131,22 +131,30 @@ class ContactManagerImpl implements ContactManager, EventListener {
 	}
 
 	@Override
-	public PendingContact addPendingContact(String link, String alias)
+	public PendingContact addPendingContact(Transaction txn, String link,
+			String alias)
 			throws DbException, FormatException, GeneralSecurityException {
 		PendingContact p =
 				pendingContactFactory.createPendingContact(link, alias);
+		AuthorId local = identityManager.getLocalAuthor(txn).getId();
+		db.addPendingContact(txn, p, local);
+		KeyPair ourKeyPair = identityManager.getHandshakeKeys(txn);
+		keyManager.addPendingContact(txn, p.getId(), p.getPublicKey(),
+				ourKeyPair);
+		return p;
+	}
+
+	@Override
+	public PendingContact addPendingContact(String link, String alias)
+			throws DbException, FormatException, GeneralSecurityException {
 		Transaction txn = db.startTransaction(false);
 		try {
-			AuthorId local = identityManager.getLocalAuthor(txn).getId();
-			db.addPendingContact(txn, p, local);
-			KeyPair ourKeyPair = identityManager.getHandshakeKeys(txn);
-			keyManager.addPendingContact(txn, p.getId(), p.getPublicKey(),
-					ourKeyPair);
+			PendingContact p = addPendingContact(txn, link, alias);
 			db.commitTransaction(txn);
+			return p;
 		} finally {
 			db.endTransaction(txn);
 		}
-		return p;
 	}
 
 	@Override
@@ -158,8 +166,14 @@ class ContactManagerImpl implements ContactManager, EventListener {
 	@Override
 	public Collection<Pair<PendingContact, PendingContactState>> getPendingContacts()
 			throws DbException {
-		Collection<PendingContact> pendingContacts =
-				db.transactionWithResult(true, db::getPendingContacts);
+		return db.transactionWithResult(true, this::getPendingContacts);
+	}
+
+	@Override
+	public Collection<Pair<PendingContact, PendingContactState>> getPendingContacts(
+			Transaction txn)
+			throws DbException {
+		Collection<PendingContact> pendingContacts = db.getPendingContacts(txn);
 		List<Pair<PendingContact, PendingContactState>> pairs =
 				new ArrayList<>(pendingContacts.size());
 		for (PendingContact p : pendingContacts) {
@@ -172,7 +186,13 @@ class ContactManagerImpl implements ContactManager, EventListener {
 
 	@Override
 	public void removePendingContact(PendingContactId p) throws DbException {
-		db.transaction(false, txn -> db.removePendingContact(txn, p));
+		db.transaction(false, txn -> removePendingContact(txn, p));
+	}
+
+	@Override
+	public void removePendingContact(Transaction txn, PendingContactId p)
+			throws DbException {
+		db.removePendingContact(txn, p);
 		states.remove(p);
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/io/IoModule.java

@@ -1,18 +1,49 @@
 package org.briarproject.bramble.io;
 
+import org.briarproject.bramble.api.WeakSingletonProvider;
 import org.briarproject.bramble.api.io.TimeoutMonitor;
 
+import javax.annotation.Nonnull;
 import javax.inject.Singleton;
+import javax.net.SocketFactory;
 
 import dagger.Module;
 import dagger.Provides;
+import okhttp3.Dns;
+import okhttp3.OkHttpClient;
+
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
 
 @Module
 public class IoModule {
 
+	private static final int CONNECT_TIMEOUT = 60_000; // Milliseconds
+
 	@Provides
 	@Singleton
 	TimeoutMonitor provideTimeoutMonitor(TimeoutMonitorImpl timeoutMonitor) {
 		return timeoutMonitor;
 	}
+
+	// Share an HTTP client instance between requests where possible, while
+	// allowing the client to be garbage-collected between requests. The
+	// provider keeps a weak reference to the last client instance and reuses
+	// the instance until it gets garbage-collected. See
+	// https://medium.com/@leandromazzuquini/if-you-are-using-okhttp-you-should-know-this-61d68e065a2b
+	@Provides
+	@Singleton
+	WeakSingletonProvider<OkHttpClient> provideOkHttpClientProvider(
+			SocketFactory torSocketFactory, Dns noDnsLookups) {
+		return new WeakSingletonProvider<OkHttpClient>() {
+			@Override
+			@Nonnull
+			public OkHttpClient createInstance() {
+				return new OkHttpClient.Builder()
+						.socketFactory(torSocketFactory)
+						.dns(noDnsLookups) // Don't make local DNS lookups
+						.connectTimeout(CONNECT_TIMEOUT, MILLISECONDS)
+						.build();
+			}
+		};
+	}
 }

bramble-core/src/main/java/org/briarproject/bramble/mailbox/MailboxApi.java

@@ -0,0 +1,177 @@
+package org.briarproject.bramble.mailbox;
+
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+
+import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.mailbox.MailboxAuthToken;
+import org.briarproject.bramble.api.mailbox.MailboxFileId;
+import org.briarproject.bramble.api.mailbox.MailboxFolderId;
+import org.briarproject.bramble.api.mailbox.MailboxProperties;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Collection;
+import java.util.List;
+
+import javax.annotation.Nonnull;
+import javax.annotation.concurrent.Immutable;
+
+interface MailboxApi {
+
+	/**
+	 * Sets up the mailbox with the setup token.
+	 *
+	 * @param properties MailboxProperties with the setup token
+	 * @return the owner token
+	 * @throws ApiException for 401 response.
+	 */
+	MailboxAuthToken setup(MailboxProperties properties)
+			throws IOException, ApiException;
+
+	/**
+	 * Checks the status of the mailbox.
+	 *
+	 * @return true if the status is OK, false otherwise.
+	 * @throws ApiException for 401 response.
+	 */
+	boolean checkStatus(MailboxProperties properties)
+			throws IOException, ApiException;
+
+	/**
+	 * Unpairs Briar and the mailbox (owner only).
+	 * Resets mailbox state to that after first install
+	 * (e.g. removes all stored files as well).
+	 */
+	void wipeMailbox(MailboxProperties properties)
+			throws IOException, ApiException;
+
+	/**
+	 * Adds a new contact to the mailbox.
+	 *
+	 * @throws TolerableFailureException if response code is 409
+	 * (contact was already added).
+	 */
+	void addContact(MailboxProperties properties, MailboxContact contact)
+			throws IOException, ApiException, TolerableFailureException;
+
+	/**
+	 * Deletes a contact from the mailbox.
+	 * This should get called after a contact was removed from Briar.
+	 *
+	 * @throws TolerableFailureException if response code is 404
+	 * (contact probably was already deleted).
+	 */
+	void deleteContact(MailboxProperties properties, ContactId contactId)
+			throws IOException, ApiException, TolerableFailureException;
+
+	/**
+	 * Gets a list of {@link ContactId}s from the mailbox.
+	 * These are the contacts that the mailbox already knows about.
+	 */
+	Collection<ContactId> getContacts(MailboxProperties properties)
+			throws IOException, ApiException;
+
+	/**
+	 * Used by contacts to send files to the owner
+	 * and by the owner to send files to contacts.
+	 * <p>
+	 * The owner can add files to the contacts' inboxes
+	 * and the contacts can add files to their own outbox.
+	 */
+	void addFile(MailboxProperties properties, MailboxFolderId folderId,
+			File file) throws IOException, ApiException;
+
+	/**
+	 * Used by owner and contacts to list their files to retrieve.
+	 * <p>
+	 * Returns 200 OK with the list of files in JSON.
+	 */
+	List<MailboxFile> getFiles(MailboxProperties properties,
+			MailboxFolderId folderId) throws IOException, ApiException;
+
+	/**
+	 * Used by owner and contacts to retrieve a file.
+	 * <p>
+	 * Returns 200 OK if successful with the files' raw bytes
+	 * in the response body.
+	 *
+	 * @param file the empty file the response bytes will be written into.
+	 */
+	void getFile(MailboxProperties properties, MailboxFolderId folderId,
+			MailboxFileId fileId, File file) throws IOException, ApiException;
+
+	/**
+	 * Used by owner and contacts to delete files.
+	 * <p>
+	 * Returns 200 OK (no exception) if deletion was successful.
+	 *
+	 * @throws TolerableFailureException on 404 response,
+	 * because file was most likely deleted already.
+	 */
+	void deleteFile(MailboxProperties properties, MailboxFolderId folderId,
+			MailboxFileId fileId)
+			throws IOException, ApiException, TolerableFailureException;
+
+	/**
+	 * Lists all contact outboxes that have files available
+	 * for the owner to download.
+	 *
+	 * @return a list of folder names
+	 * to be used with {@link #getFiles(MailboxProperties, MailboxFolderId)}.
+	 * @throws IllegalArgumentException if used by non-owner.
+	 */
+	List<MailboxFolderId> getFolders(MailboxProperties properties)
+			throws IOException, ApiException;
+
+	@Immutable
+	@JsonSerialize
+	class MailboxContact {
+		public final int contactId;
+		public final MailboxAuthToken token;
+		public final MailboxFolderId inboxId, outboxId;
+
+		MailboxContact(ContactId contactId,
+				MailboxAuthToken token,
+				MailboxFolderId inboxId,
+				MailboxFolderId outboxId) {
+			this.contactId = contactId.getInt();
+			this.token = token;
+			this.inboxId = inboxId;
+			this.outboxId = outboxId;
+		}
+	}
+
+	@JsonSerialize
+	class MailboxFile implements Comparable<MailboxFile> {
+		public final MailboxFileId name;
+		public final long time;
+
+		public MailboxFile(MailboxFileId name, long time) {
+			this.name = name;
+			this.time = time;
+		}
+
+		@Override
+		public int compareTo(@Nonnull MailboxApi.MailboxFile mailboxFile) {
+			//noinspection UseCompareMethod
+			return time < mailboxFile.time ? -1 :
+					(time == mailboxFile.time ? 0 : 1);
+		}
+	}
+
+	@Immutable
+	class ApiException extends Exception {
+	}
+
+	@Immutable
+	class MailboxAlreadyPairedException extends ApiException {
+	}
+
+	/**
+	 * A failure that does not need to be retried,
+	 * e.g. when adding a contact that already exists.
+	 */
+	@Immutable
+	class TolerableFailureException extends Exception {
+	}
+}

bramble-core/src/main/java/org/briarproject/bramble/mailbox/MailboxApiImpl.java

@@ -0,0 +1,301 @@
+package org.briarproject.bramble.mailbox;
+
+import com.fasterxml.jackson.core.JacksonException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.json.JsonMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import org.briarproject.bramble.api.WeakSingletonProvider;
+import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.mailbox.InvalidMailboxIdException;
+import org.briarproject.bramble.api.mailbox.MailboxAuthToken;
+import org.briarproject.bramble.api.mailbox.MailboxFileId;
+import org.briarproject.bramble.api.mailbox.MailboxFolderId;
+import org.briarproject.bramble.api.mailbox.MailboxId;
+import org.briarproject.bramble.api.mailbox.MailboxProperties;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+
+import javax.inject.Inject;
+
+import okhttp3.MediaType;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.RequestBody;
+import okhttp3.Response;
+import okhttp3.ResponseBody;
+
+import static com.fasterxml.jackson.databind.MapperFeature.BLOCK_UNSAFE_POLYMORPHIC_BASE_TYPES;
+import static java.util.Objects.requireNonNull;
+import static okhttp3.internal.Util.EMPTY_REQUEST;
+import static org.briarproject.bramble.util.IoUtils.copyAndClose;
+
+@NotNullByDefault
+class MailboxApiImpl implements MailboxApi {
+
+	private final WeakSingletonProvider<OkHttpClient> httpClientProvider;
+	private final JsonMapper mapper = JsonMapper.builder()
+			.enable(BLOCK_UNSAFE_POLYMORPHIC_BASE_TYPES)
+			.build();
+	private static final MediaType JSON =
+			requireNonNull(MediaType.parse("application/json; charset=utf-8"));
+	private static final MediaType FILE =
+			requireNonNull(MediaType.parse("application/octet-stream"));
+
+	@Inject
+	MailboxApiImpl(WeakSingletonProvider<OkHttpClient> httpClientProvider) {
+		this.httpClientProvider = httpClientProvider;
+	}
+
+	@Override
+	public MailboxAuthToken setup(MailboxProperties properties)
+			throws IOException, ApiException {
+		if (!properties.isOwner()) throw new IllegalArgumentException();
+		Request request = getRequestBuilder(properties.getAuthToken())
+				.url(properties.getBaseUrl() + "/setup")
+				.put(EMPTY_REQUEST)
+				.build();
+		OkHttpClient client = httpClientProvider.get();
+		Response response = client.newCall(request).execute();
+		if (response.code() == 401) throw new MailboxAlreadyPairedException();
+		if (!response.isSuccessful()) throw new ApiException();
+		ResponseBody body = response.body();
+		if (body == null) throw new ApiException();
+		try {
+			JsonNode node = mapper.readTree(body.string());
+			JsonNode tokenNode = node.get("token");
+			if (tokenNode == null) {
+				throw new ApiException();
+			}
+			String ownerToken = tokenNode.textValue();
+			return MailboxAuthToken.fromString(ownerToken);
+		} catch (JacksonException | InvalidMailboxIdException e) {
+			throw new ApiException();
+		}
+	}
+
+	@Override
+	public boolean checkStatus(MailboxProperties properties)
+			throws IOException, ApiException {
+		if (!properties.isOwner()) throw new IllegalArgumentException();
+		Response response = sendGetRequest(properties, "/status");
+		if (response.code() == 401) throw new ApiException();
+		return response.isSuccessful();
+	}
+
+	@Override
+	public void wipeMailbox(MailboxProperties properties)
+			throws IOException, ApiException {
+		if (!properties.isOwner()) throw new IllegalArgumentException();
+		Request request = getRequestBuilder(properties.getAuthToken())
+				.url(properties.getBaseUrl() + "/")
+				.delete()
+				.build();
+		OkHttpClient client = httpClientProvider.get();
+		Response response = client.newCall(request).execute();
+		if (response.code() != 204) throw new ApiException();
+	}
+
+	/* Contact Management API (owner only) */
+
+	@Override
+	public void addContact(MailboxProperties properties, MailboxContact contact)
+			throws IOException, ApiException, TolerableFailureException {
+		if (!properties.isOwner()) throw new IllegalArgumentException();
+		byte[] bodyBytes = mapper.writeValueAsBytes(contact);
+		RequestBody body = RequestBody.create(JSON, bodyBytes);
+		Response response = sendPostRequest(properties, "/contacts", body);
+		if (response.code() == 409) throw new TolerableFailureException();
+		if (!response.isSuccessful()) throw new ApiException();
+	}
+
+	@Override
+	public void deleteContact(MailboxProperties properties, ContactId contactId)
+			throws IOException, ApiException, TolerableFailureException {
+		if (!properties.isOwner()) throw new IllegalArgumentException();
+		String url = properties.getBaseUrl() + "/contacts/" +
+				contactId.getInt();
+		Request request = getRequestBuilder(properties.getAuthToken())
+				.delete()
+				.url(url)
+				.build();
+		OkHttpClient client = httpClientProvider.get();
+		Response response = client.newCall(request).execute();
+		if (response.code() == 404) throw new TolerableFailureException();
+		if (response.code() != 200) throw new ApiException();
+	}
+
+	@Override
+	public Collection<ContactId> getContacts(MailboxProperties properties)
+			throws IOException, ApiException {
+		if (!properties.isOwner()) throw new IllegalArgumentException();
+		Response response = sendGetRequest(properties, "/contacts");
+		if (response.code() != 200) throw new ApiException();
+
+		ResponseBody body = response.body();
+		if (body == null) throw new ApiException();
+		try {
+			JsonNode node = mapper.readTree(body.string());
+			ArrayNode contactsNode = getArray(node, "contacts");
+			List<ContactId> list = new ArrayList<>();
+			for (JsonNode contactNode : contactsNode) {
+				if (!contactNode.isNumber()) throw new ApiException();
+				int id = contactNode.intValue();
+				if (id < 1) throw new ApiException();
+				list.add(new ContactId(id));
+			}
+			return list;
+		} catch (JacksonException e) {
+			throw new ApiException();
+		}
+	}
+
+	/* File Management (owner and contacts) */
+
+	@Override
+	public void addFile(MailboxProperties properties, MailboxFolderId folderId,
+			File file) throws IOException, ApiException {
+		String path = "/files/" + folderId;
+		RequestBody body = RequestBody.create(FILE, file);
+		Response response = sendPostRequest(properties, path, body);
+		if (response.code() != 200) throw new ApiException();
+	}
+
+	@Override
+	public List<MailboxFile> getFiles(MailboxProperties properties,
+			MailboxFolderId folderId) throws IOException, ApiException {
+		String path = "/files/" + folderId;
+		Response response = sendGetRequest(properties, path);
+		if (response.code() != 200) throw new ApiException();
+
+		ResponseBody body = response.body();
+		if (body == null) throw new ApiException();
+		try {
+			JsonNode node = mapper.readTree(body.string());
+			ArrayNode filesNode = getArray(node, "files");
+			List<MailboxFile> list = new ArrayList<>();
+			for (JsonNode fileNode : filesNode) {
+				if (!fileNode.isObject()) throw new ApiException();
+				ObjectNode objectNode = (ObjectNode) fileNode;
+				JsonNode nameNode = objectNode.get("name");
+				JsonNode timeNode = objectNode.get("time");
+				if (nameNode == null || !nameNode.isTextual()) {
+					throw new ApiException();
+				}
+				if (timeNode == null || !timeNode.isNumber()) {
+					throw new ApiException();
+				}
+				String name = nameNode.asText();
+				long time = timeNode.asLong();
+				if (time < 1) throw new ApiException();
+				list.add(new MailboxFile(MailboxFileId.fromString(name), time));
+			}
+			Collections.sort(list);
+			return list;
+		} catch (JacksonException | InvalidMailboxIdException e) {
+			throw new ApiException();
+		}
+	}
+
+	@Override
+	public void getFile(MailboxProperties properties, MailboxFolderId folderId,
+			MailboxFileId fileId, File file) throws IOException, ApiException {
+		String path = "/files/" + folderId + "/" + fileId;
+		Response response = sendGetRequest(properties, path);
+		if (response.code() != 200) throw new ApiException();
+
+		ResponseBody body = response.body();
+		if (body == null) throw new ApiException();
+		FileOutputStream outputStream = new FileOutputStream(file);
+		copyAndClose(body.byteStream(), outputStream);
+	}
+
+	@Override
+	public void deleteFile(MailboxProperties properties,
+			MailboxFolderId folderId, MailboxFileId fileId)
+			throws IOException, ApiException, TolerableFailureException {
+		String path = "/files/" + folderId + "/" + fileId;
+		Request request = getRequestBuilder(properties.getAuthToken())
+				.delete()
+				.url(properties.getBaseUrl() + path)
+				.build();
+		OkHttpClient client = httpClientProvider.get();
+		Response response = client.newCall(request).execute();
+		if (response.code() == 404) throw new TolerableFailureException();
+		if (response.code() != 200) throw new ApiException();
+	}
+
+	@Override
+	public List<MailboxFolderId> getFolders(MailboxProperties properties)
+			throws IOException, ApiException {
+		if (!properties.isOwner()) throw new IllegalArgumentException();
+		Response response = sendGetRequest(properties, "/folders");
+		if (response.code() != 200) throw new ApiException();
+
+		ResponseBody body = response.body();
+		if (body == null) throw new ApiException();
+		try {
+			JsonNode node = mapper.readTree(body.string());
+			ArrayNode filesNode = getArray(node, "folders");
+			List<MailboxFolderId> list = new ArrayList<>();
+			for (JsonNode fileNode : filesNode) {
+				if (!fileNode.isObject()) throw new ApiException();
+				ObjectNode objectNode = (ObjectNode) fileNode;
+				JsonNode idNode = objectNode.get("id");
+				if (idNode == null || !idNode.isTextual()) {
+					throw new ApiException();
+				}
+				String id = idNode.asText();
+				list.add(MailboxFolderId.fromString(id));
+			}
+			return list;
+		} catch (JacksonException | InvalidMailboxIdException e) {
+			throw new ApiException();
+		}
+	}
+
+	/* Helper Functions */
+
+	private Response sendGetRequest(MailboxProperties properties, String path)
+			throws IOException {
+		Request request = getRequestBuilder(properties.getAuthToken())
+				.url(properties.getBaseUrl() + path)
+				.build();
+		OkHttpClient client = httpClientProvider.get();
+		return client.newCall(request).execute();
+	}
+
+	private Response sendPostRequest(MailboxProperties properties, String path,
+			RequestBody body) throws IOException {
+		Request request = getRequestBuilder(properties.getAuthToken())
+				.url(properties.getBaseUrl() + path)
+				.post(body)
+				.build();
+		OkHttpClient client = httpClientProvider.get();
+		return client.newCall(request).execute();
+	}
+
+	private Request.Builder getRequestBuilder(MailboxId token) {
+		return new Request.Builder()
+				.addHeader("Authorization", "Bearer " + token);
+	}
+
+	/* JSON helpers */
+
+	private ArrayNode getArray(JsonNode node, String name) throws ApiException {
+		JsonNode arrayNode = node.get(name);
+		if (arrayNode == null || !arrayNode.isArray()) {
+			throw new ApiException();
+		}
+		return (ArrayNode) arrayNode;
+	}
+
+}

bramble-core/src/main/java/org/briarproject/bramble/mailbox/MailboxManagerImpl.java

@@ -0,0 +1,78 @@
+package org.briarproject.bramble.mailbox;
+
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.db.Transaction;
+import org.briarproject.bramble.api.lifecycle.IoExecutor;
+import org.briarproject.bramble.api.mailbox.MailboxManager;
+import org.briarproject.bramble.api.mailbox.MailboxPairingTask;
+import org.briarproject.bramble.api.mailbox.MailboxSettingsManager;
+import org.briarproject.bramble.api.mailbox.MailboxStatus;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import java.util.concurrent.Executor;
+
+import javax.annotation.Nullable;
+import javax.annotation.concurrent.GuardedBy;
+import javax.annotation.concurrent.Immutable;
+import javax.inject.Inject;
+
+@Immutable
+@NotNullByDefault
+class MailboxManagerImpl implements MailboxManager {
+
+	private final Executor ioExecutor;
+	private final MailboxSettingsManager mailboxSettingsManager;
+	private final MailboxPairingTaskFactory pairingTaskFactory;
+	private final Object lock = new Object();
+
+	@Nullable
+	@GuardedBy("lock")
+	private MailboxPairingTask pairingTask = null;
+
+	@Inject
+	MailboxManagerImpl(
+			@IoExecutor Executor ioExecutor,
+			MailboxSettingsManager mailboxSettingsManager,
+			MailboxPairingTaskFactory pairingTaskFactory) {
+		this.ioExecutor = ioExecutor;
+		this.mailboxSettingsManager = mailboxSettingsManager;
+		this.pairingTaskFactory = pairingTaskFactory;
+	}
+
+	@Override
+	public boolean isPaired(Transaction txn) throws DbException {
+		return mailboxSettingsManager.getOwnMailboxProperties(txn) != null;
+	}
+
+	@Override
+	public MailboxStatus getMailboxStatus(Transaction txn) throws DbException {
+		return mailboxSettingsManager.getOwnMailboxStatus(txn);
+	}
+
+	@Nullable
+	@Override
+	public MailboxPairingTask getCurrentPairingTask() {
+		synchronized (lock) {
+			return pairingTask;
+		}
+	}
+
+	@Override
+	public MailboxPairingTask startPairingTask(String payload) {
+		MailboxPairingTask created;
+		synchronized (lock) {
+			if (pairingTask != null) return pairingTask;
+			created = pairingTaskFactory.createPairingTask(payload);
+			pairingTask = created;
+		}
+		ioExecutor.execute(() -> {
+			created.run();
+			synchronized (lock) {
+				// remove task after it finished
+				pairingTask = null;
+			}
+		});
+		return created;
+	}
+
+}

bramble-core/src/main/java/org/briarproject/bramble/mailbox/MailboxModule.java

@@ -1,16 +1,36 @@
 package org.briarproject.bramble.mailbox;
 
+import org.briarproject.bramble.api.mailbox.MailboxManager;
 import org.briarproject.bramble.api.mailbox.MailboxSettingsManager;
 
+import javax.inject.Singleton;
+
 import dagger.Module;
 import dagger.Provides;
 
 @Module
 public class MailboxModule {
 
+	@Provides
+	@Singleton
+	MailboxManager providesMailboxManager(MailboxManagerImpl mailboxManager) {
+		return mailboxManager;
+	}
+
+	@Provides
+	MailboxPairingTaskFactory provideMailboxPairingTaskFactory(
+			MailboxPairingTaskFactoryImpl mailboxPairingTaskFactory) {
+		return mailboxPairingTaskFactory;
+	}
+
 	@Provides
 	MailboxSettingsManager provideMailboxSettingsManager(
 			MailboxSettingsManagerImpl mailboxSettingsManager) {
 		return mailboxSettingsManager;
 	}
+
+	@Provides
+	MailboxApi providesMailboxApi(MailboxApiImpl mailboxApi) {
+		return mailboxApi;
+	}
 }

bramble-core/src/main/java/org/briarproject/bramble/mailbox/MailboxPairingTaskFactory.java

@@ -0,0 +1,12 @@
+package org.briarproject.bramble.mailbox;
+
+
+import org.briarproject.bramble.api.mailbox.MailboxPairingTask;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+@NotNullByDefault
+interface MailboxPairingTaskFactory {
+
+	MailboxPairingTask createPairingTask(String qrCodePayload);
+
+}

bramble-core/src/main/java/org/briarproject/bramble/mailbox/MailboxPairingTaskFactoryImpl.java

@@ -0,0 +1,48 @@
+package org.briarproject.bramble.mailbox;
+
+import org.briarproject.bramble.api.crypto.CryptoComponent;
+import org.briarproject.bramble.api.db.TransactionManager;
+import org.briarproject.bramble.api.event.EventExecutor;
+import org.briarproject.bramble.api.mailbox.MailboxPairingTask;
+import org.briarproject.bramble.api.mailbox.MailboxSettingsManager;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.system.Clock;
+
+import java.util.concurrent.Executor;
+
+import javax.annotation.concurrent.Immutable;
+import javax.inject.Inject;
+
+@Immutable
+@NotNullByDefault
+class MailboxPairingTaskFactoryImpl implements MailboxPairingTaskFactory {
+
+	private final Executor eventExecutor;
+	private final TransactionManager db;
+	private final CryptoComponent crypto;
+	private final Clock clock;
+	private final MailboxApi api;
+	private final MailboxSettingsManager mailboxSettingsManager;
+
+	@Inject
+	MailboxPairingTaskFactoryImpl(
+			@EventExecutor Executor eventExecutor,
+			TransactionManager db,
+			CryptoComponent crypto,
+			Clock clock,
+			MailboxApi api,
+			MailboxSettingsManager mailboxSettingsManager) {
+		this.eventExecutor = eventExecutor;
+		this.db = db;
+		this.crypto = crypto;
+		this.clock = clock;
+		this.api = api;
+		this.mailboxSettingsManager = mailboxSettingsManager;
+	}
+
+	@Override
+	public MailboxPairingTask createPairingTask(String qrCodePayload) {
+		return new MailboxPairingTaskImpl(qrCodePayload, eventExecutor, db,
+				crypto, clock, api, mailboxSettingsManager);
+	}
+}

bramble-core/src/main/java/org/briarproject/bramble/mailbox/MailboxPairingTaskImpl.java

@@ -0,0 +1,172 @@
+package org.briarproject.bramble.mailbox;
+
+import org.briarproject.bramble.api.Consumer;
+import org.briarproject.bramble.api.FormatException;
+import org.briarproject.bramble.api.crypto.CryptoComponent;
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.db.TransactionManager;
+import org.briarproject.bramble.api.event.EventExecutor;
+import org.briarproject.bramble.api.mailbox.MailboxAuthToken;
+import org.briarproject.bramble.api.mailbox.MailboxPairingState;
+import org.briarproject.bramble.api.mailbox.MailboxPairingTask;
+import org.briarproject.bramble.api.mailbox.MailboxProperties;
+import org.briarproject.bramble.api.mailbox.MailboxSettingsManager;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.system.Clock;
+import org.briarproject.bramble.mailbox.MailboxApi.ApiException;
+import org.briarproject.bramble.mailbox.MailboxApi.MailboxAlreadyPairedException;
+
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.Executor;
+import java.util.logging.Logger;
+
+import javax.annotation.concurrent.GuardedBy;
+import javax.annotation.concurrent.ThreadSafe;
+
+import static java.util.logging.Level.WARNING;
+import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.util.LogUtils.logException;
+
+@ThreadSafe
+@NotNullByDefault
+class MailboxPairingTaskImpl implements MailboxPairingTask {
+
+	private final static Logger LOG =
+			getLogger(MailboxPairingTaskImpl.class.getName());
+	@SuppressWarnings("CharsetObjectCanBeUsed") // Requires minSdkVersion >= 19
+	private static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");
+	private static final int VERSION_REQUIRED = 32;
+
+	private final String payload;
+	private final Executor eventExecutor;
+	private final TransactionManager db;
+	private final CryptoComponent crypto;
+	private final Clock clock;
+	private final MailboxApi api;
+	private final MailboxSettingsManager mailboxSettingsManager;
+
+	private final Object lock = new Object();
+	@GuardedBy("lock")
+	private final List<Consumer<MailboxPairingState>> observers =
+			new ArrayList<>();
+	@GuardedBy("lock")
+	private MailboxPairingState state;
+
+	MailboxPairingTaskImpl(
+			String payload,
+			@EventExecutor Executor eventExecutor,
+			TransactionManager db,
+			CryptoComponent crypto,
+			Clock clock,
+			MailboxApi api,
+			MailboxSettingsManager mailboxSettingsManager) {
+		this.payload = payload;
+		this.eventExecutor = eventExecutor;
+		this.db = db;
+		this.crypto = crypto;
+		this.clock = clock;
+		this.api = api;
+		this.mailboxSettingsManager = mailboxSettingsManager;
+		state = new MailboxPairingState.QrCodeReceived(payload);
+	}
+
+	@Override
+	public void addObserver(Consumer<MailboxPairingState> o) {
+		MailboxPairingState state;
+		synchronized (lock) {
+			observers.add(o);
+			state = this.state;
+			eventExecutor.execute(() -> o.accept(state));
+		}
+	}
+
+	@Override
+	public void removeObserver(Consumer<MailboxPairingState> o) {
+		synchronized (lock) {
+			observers.remove(o);
+		}
+	}
+
+	@Override
+	public void run() {
+		try {
+			pairMailbox();
+		} catch (FormatException e) {
+			onMailboxError(e, new MailboxPairingState.InvalidQrCode());
+		} catch (MailboxAlreadyPairedException e) {
+			onMailboxError(e, new MailboxPairingState.MailboxAlreadyPaired());
+		} catch (IOException e) {
+			onMailboxError(e, new MailboxPairingState.ConnectionError(payload));
+		} catch (ApiException | DbException e) {
+			onMailboxError(e, new MailboxPairingState.UnexpectedError(payload));
+		}
+	}
+
+	private void pairMailbox() throws IOException, ApiException, DbException {
+		MailboxProperties mailboxProperties = decodeQrCodePayload(payload);
+		setState(new MailboxPairingState.Pairing(payload));
+		MailboxAuthToken ownerToken = api.setup(mailboxProperties);
+		MailboxProperties ownerProperties = new MailboxProperties(
+				mailboxProperties.getBaseUrl(), ownerToken, true);
+		long time = clock.currentTimeMillis();
+		db.transaction(false, txn -> {
+			mailboxSettingsManager
+					.setOwnMailboxProperties(txn, ownerProperties);
+			mailboxSettingsManager.recordSuccessfulConnection(txn, time);
+		});
+		setState(new MailboxPairingState.Paired());
+	}
+
+	private void onMailboxError(Exception e, MailboxPairingState state) {
+		logException(LOG, WARNING, e);
+		setState(state);
+	}
+
+	private void setState(MailboxPairingState state) {
+		synchronized (lock) {
+			this.state = state;
+			notifyObservers();
+		}
+	}
+
+	@GuardedBy("lock")
+	private void notifyObservers() {
+		List<Consumer<MailboxPairingState>> observers =
+				new ArrayList<>(this.observers);
+		MailboxPairingState state = this.state;
+		eventExecutor.execute(() -> {
+			for (Consumer<MailboxPairingState> o : observers) o.accept(state);
+		});
+	}
+
+	private MailboxProperties decodeQrCodePayload(String payload)
+			throws FormatException {
+		byte[] bytes = payload.getBytes(ISO_8859_1);
+		if (bytes.length != 65) {
+			if (LOG.isLoggable(WARNING)) {
+				LOG.warning("QR code length is not 65: " + bytes.length);
+			}
+			throw new FormatException();
+		}
+		int version = bytes[0] & 0xFF;
+		if (version != VERSION_REQUIRED) {
+			if (LOG.isLoggable(WARNING)) {
+				LOG.warning("QR code has not version " + VERSION_REQUIRED +
+						": " + version);
+			}
+			throw new FormatException();
+		}
+		LOG.info("QR code is valid");
+		byte[] onionPubKey = Arrays.copyOfRange(bytes, 1, 33);
+		String onionAddress = crypto.encodeOnionAddress(onionPubKey);
+		String baseUrl = "http://" + onionAddress + ".onion";
+		byte[] tokenBytes = Arrays.copyOfRange(bytes, 33, 65);
+		MailboxAuthToken setupToken = new MailboxAuthToken(tokenBytes);
+		return new MailboxProperties(baseUrl, setupToken, true);
+	}
+
+}

bramble-core/src/main/java/org/briarproject/bramble/mailbox/MailboxSettingsManagerImpl.java

@@ -3,6 +3,8 @@ package org.briarproject.bramble.mailbox;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Transaction;
+import org.briarproject.bramble.api.mailbox.InvalidMailboxIdException;
+import org.briarproject.bramble.api.mailbox.MailboxAuthToken;
 import org.briarproject.bramble.api.mailbox.MailboxProperties;
 import org.briarproject.bramble.api.mailbox.MailboxSettingsManager;
 import org.briarproject.bramble.api.mailbox.MailboxStatus;
@@ -43,15 +45,20 @@ class MailboxSettingsManagerImpl implements MailboxSettingsManager {
 		String onion = s.get(SETTINGS_KEY_ONION);
 		String token = s.get(SETTINGS_KEY_TOKEN);
 		if (isNullOrEmpty(onion) || isNullOrEmpty(token)) return null;
-		return new MailboxProperties(onion, token, true);
+		try {
+			MailboxAuthToken tokenId = MailboxAuthToken.fromString(token);
+			return new MailboxProperties(onion, tokenId, true);
+		} catch (InvalidMailboxIdException e) {
+			throw new DbException(e);
+		}
 	}
 
 	@Override
 	public void setOwnMailboxProperties(Transaction txn, MailboxProperties p)
 			throws DbException {
 		Settings s = new Settings();
-		s.put(SETTINGS_KEY_ONION, p.getOnionAddress());
-		s.put(SETTINGS_KEY_TOKEN, p.getAuthToken());
+		s.put(SETTINGS_KEY_ONION, p.getBaseUrl());
+		s.put(SETTINGS_KEY_TOKEN, p.getAuthToken().toString());
 		settingsManager.mergeSettings(txn, s, SETTINGS_NAMESPACE);
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/plugin/file/RemovableDriveTaskRegistry.java

@@ -3,6 +3,7 @@ package org.briarproject.bramble.plugin.file;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.file.RemovableDriveTask;
 
+@Deprecated // We can simply remove tasks when they finish
 @NotNullByDefault
 interface RemovableDriveTaskRegistry {
 

bramble-core/src/main/resources/bridges

@@ -11,7 +11,10 @@ d Bridge obfs4 45.145.95.6:27015 C5B7CD6946FF10C5B3E89691A7D3F2C122D2117C cert=T
 d Bridge obfs4 51.222.13.177:80 5EDAC3B810E12B01F6FD8050D2FD3E277B289A08 cert=2uplIpLQ0q9+0qMFrK5pkaYRDOe460LL9WHBvatgkuRr/SL31wBOEupaMMJ6koRE6Ld0ew iat-mode=0
 d Bridge obfs4 185.100.85.3:443 5B403DFE34F4872EB027059CECAE30B0C864B3A2 cert=bWUdFUe8io9U6JkSLoGAvSAUDcB779/shovCYmYAQb/pW/iEAMZtO/lCd94OokOF909TPA iat-mode=2
 n Bridge obfs4 46.226.107.197:10300 A38FD6BDFD902882F5F5B9B7CCC95602A20B0BC4 cert=t8tA9q2AeGlmp/dO6oW9bkY5RqqmvqjArCEM9wjJoDnk6XtnaejkF0JTA7VamdyOzcvuBg iat-mode=0
-n Bridge obfs4 74.104.165.202:9002 EF432018A6AA5D970B2F84E39CD30A147030141C cert=PhppfUusY85dHGvWtGTybZ1fED4DtbHmALkNMIOIYrAz1B4xN7/2a5gyiZe1epju1BOHVg iat-mode=0
 n Bridge obfs4 23.88.49.56:443 1CDA1660823AE2565D7F50DE8EB99DFDDE96074B cert=4bwNXedHutVD0ZqCm6ph90Vik9dRY4n9qnBHiLiqQOSsIvui4iHwuMFQK6oqiK8tyhVcDw iat-mode=0
-n Bridge obfs4 185.65.206.101:443 8A3E001D4C5105ED41060597DEEB21FF19CDC4D3 cert=Nd6XZ+f00sGKL1u6USmyvfqR34HN/pt7jEVbgMpXPF/yyGaLBiXRH/x0SIjX5TceYnd+Dg iat-mode=0
+n Bridge obfs4 185.181.11.86:443 A961609729E7FDF520B4E81F1F1B8FA1045285C3 cert=e5faG9Zk4Ni+e7z2YgGfevyKPQlMvkVGi4ublSsHYjaBovKeNXpOhbeFxzbZZoAzxAoGUQ iat-mode=0
+n Bridge obfs4 85.242.211.221:8042 A36A938DD7FDB8BACC846BA326EE0BA0D89A9252 cert=1AN6Pt1eFca3Y/WYD2TGAU3Al9cO4eouXE9SX63s66Z/ks3tVmgQ5GeXi1B5DOvx6Il7Zw iat-mode=0
+n Bridge obfs4 185.161.70.200:9003 7A81D0CD19870DFA3FD13C5DE232D8ADD026DC40 cert=aIcWxyZS3JcWsowlD9hcw9fttA44Bq/W2laFjVWlhuXqrIlAAwrXvq1O9lm9XrkV8GG/ZA iat-mode=0
+n Bridge obfs4 172.105.22.69:80 CBD17B33192A879433AB37C9E142541BD3459ABD cert=rk5YmpKypLsjlS4tjkYaZNBweYMa5tWQRhZ8Q2WRleNOgrhSceKo59BA8kp6kVfaMPXnSw iat-mode=0
+n Bridge obfs4 46.128.93.192:7346 5D28B8E1D117B8720D56A8513CF32509DCA1D84F cert=ED6tZP50eF0vno09F5gFvoWTMdcWFEX2FtwXOUYRevjzKg30/y701f61Vycnh6HO9gkaMw iat-mode=0
 m Bridge meek_lite 192.0.2.2:2 97700DFE9F483596DDA6264C4D7DF7641E1E39CE url=https://meek.azureedge.net/ front=ajax.aspnetcdn.com

bramble-core/src/test/bash/wait-for-mailbox.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+set -e
+
+URL="http://127.0.0.1:8000/status"
+attempt_counter=0
+max_attempts=200 # 10min - CI for mailbox currently takes ~5min
+
+echo "Waiting for mailbox to come online at $URL"
+
+until [[ "$(curl -s -o /dev/null -w '%{http_code}' $URL)" == "401" ]]; do
+  if [ ${attempt_counter} -eq ${max_attempts} ]; then
+    echo "Timed out waiting for mailbox"
+    exit 1
+  fi
+
+  printf '.'
+  attempt_counter=$((attempt_counter + 1))
+  sleep 3
+done
+
+echo "Mailbox started"

bramble-core/src/test/java/org/briarproject/bramble/client/BdfMessageValidatorTest.java

@@ -13,7 +13,7 @@ import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.MessageContext;
 import org.briarproject.bramble.test.ValidatorTestCase;
 import org.jmock.Expectations;
-import org.jmock.lib.legacy.ClassImposteriser;
+import org.jmock.imposters.ByteBuddyClassImposteriser;
 import org.junit.Test;
 
 import static org.briarproject.bramble.api.transport.TransportConstants.MAX_CLOCK_DIFFERENCE;
@@ -38,7 +38,7 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 	private final Metadata meta = new Metadata();
 
 	public BdfMessageValidatorTest() {
-		context.setImposteriser(ClassImposteriser.INSTANCE);
+		context.setImposteriser(ByteBuddyClassImposteriser.INSTANCE);
 	}
 
 	@Test(expected = InvalidMessageException.class)

bramble-core/src/test/java/org/briarproject/bramble/keyagreement/KeyAgreementProtocolTest.java

@@ -11,9 +11,9 @@ import org.briarproject.bramble.api.keyagreement.PayloadEncoder;
 import org.briarproject.bramble.test.BrambleTestCase;
 import org.jmock.Expectations;
 import org.jmock.auto.Mock;
+import org.jmock.imposters.ByteBuddyClassImposteriser;
 import org.jmock.integration.junit4.JUnitRuleMockery;
 import org.jmock.lib.concurrent.Synchroniser;
-import org.jmock.lib.legacy.ClassImposteriser;
 import org.junit.Rule;
 import org.junit.Test;
 
@@ -35,7 +35,7 @@ public class KeyAgreementProtocolTest extends BrambleTestCase {
 	@Rule
 	public JUnitRuleMockery context = new JUnitRuleMockery() {{
 		// So we can mock concrete classes like KeyAgreementTransport
-		setImposteriser(ClassImposteriser.INSTANCE);
+		setImposteriser(ByteBuddyClassImposteriser.INSTANCE);
 		setThreadingPolicy(new Synchroniser());
 	}};
 

bramble-core/src/test/java/org/briarproject/bramble/keyagreement/KeyAgreementTransportTest.java

@@ -14,7 +14,7 @@ import org.briarproject.bramble.api.record.RecordWriterFactory;
 import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.briarproject.bramble.test.CaptureArgumentAction;
 import org.jmock.Expectations;
-import org.jmock.lib.legacy.ClassImposteriser;
+import org.jmock.imposters.ByteBuddyClassImposteriser;
 import org.junit.Test;
 
 import java.io.InputStream;
@@ -58,7 +58,7 @@ public class KeyAgreementTransportTest extends BrambleMockTestCase {
 	private KeyAgreementTransport kat;
 
 	public KeyAgreementTransportTest() {
-		context.setImposteriser(ClassImposteriser.INSTANCE);
+		context.setImposteriser(ByteBuddyClassImposteriser.INSTANCE);
 		inputStream = context.mock(InputStream.class);
 		outputStream = context.mock(OutputStream.class);
 	}

bramble-core/src/test/java/org/briarproject/bramble/mailbox/MailboxApiTest.java

@@ -0,0 +1,802 @@
+package org.briarproject.bramble.mailbox;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import org.briarproject.bramble.api.WeakSingletonProvider;
+import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.mailbox.MailboxAuthToken;
+import org.briarproject.bramble.api.mailbox.MailboxFileId;
+import org.briarproject.bramble.api.mailbox.MailboxFolderId;
+import org.briarproject.bramble.api.mailbox.MailboxId;
+import org.briarproject.bramble.api.mailbox.MailboxProperties;
+import org.briarproject.bramble.mailbox.MailboxApi.ApiException;
+import org.briarproject.bramble.mailbox.MailboxApi.MailboxContact;
+import org.briarproject.bramble.mailbox.MailboxApi.MailboxFile;
+import org.briarproject.bramble.mailbox.MailboxApi.TolerableFailureException;
+import org.briarproject.bramble.test.BrambleTestCase;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import javax.annotation.Nonnull;
+import javax.net.SocketFactory;
+
+import okhttp3.OkHttpClient;
+import okhttp3.mockwebserver.MockResponse;
+import okhttp3.mockwebserver.MockWebServer;
+import okhttp3.mockwebserver.RecordedRequest;
+import okio.Buffer;
+
+import static java.util.Collections.singletonList;
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+import static org.briarproject.bramble.test.TestUtils.getContactId;
+import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
+import static org.briarproject.bramble.test.TestUtils.getRandomId;
+import static org.briarproject.bramble.test.TestUtils.readBytes;
+import static org.briarproject.bramble.test.TestUtils.writeBytes;
+import static org.briarproject.bramble.util.StringUtils.getRandomString;
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertThrows;
+import static org.junit.Assert.assertTrue;
+
+public class MailboxApiTest extends BrambleTestCase {
+
+	@Rule
+	public TemporaryFolder folder = new TemporaryFolder();
+
+	private final OkHttpClient client = new OkHttpClient.Builder()
+			.socketFactory(SocketFactory.getDefault())
+			.connectTimeout(60_000, MILLISECONDS)
+			.build();
+	private final WeakSingletonProvider<OkHttpClient> httpClientProvider =
+			new WeakSingletonProvider<OkHttpClient>() {
+				@Override
+				@Nonnull
+				public OkHttpClient createInstance() {
+					return client;
+				}
+			};
+	private final MailboxApiImpl api = new MailboxApiImpl(httpClientProvider);
+
+	private final MailboxAuthToken token = new MailboxAuthToken(getRandomId());
+	private final MailboxAuthToken token2 = new MailboxAuthToken(getRandomId());
+	private final ContactId contactId = getContactId();
+	private final MailboxAuthToken contactToken =
+			new MailboxAuthToken(getRandomId());
+	private final MailboxFolderId contactInboxId =
+			new MailboxFolderId(getRandomId());
+	private final MailboxFolderId contactOutboxId =
+			new MailboxFolderId(getRandomId());
+	private final MailboxContact mailboxContact = new MailboxContact(
+			contactId, contactToken, contactInboxId, contactOutboxId);
+
+	@Test
+	public void testSetup() throws Exception {
+		String validResponse = "{\"token\":\"" + token2 + "\"}";
+		String invalidResponse = "{\"foo\":\"bar\"}";
+		String invalidTokenResponse = "{\"token\":{\"foo\":\"bar\"}}";
+		String invalidTokenResponse2 =
+				"{\"token\":\"" + getRandomString(64) + "\"}";
+
+		MockWebServer server = new MockWebServer();
+		server.enqueue(new MockResponse().setBody(validResponse));
+		server.enqueue(new MockResponse());
+		server.enqueue(new MockResponse().setBody(invalidResponse));
+		server.enqueue(new MockResponse().setResponseCode(401));
+		server.enqueue(new MockResponse().setResponseCode(500));
+		server.enqueue(new MockResponse().setBody(invalidTokenResponse));
+		server.enqueue(new MockResponse().setBody(invalidTokenResponse2));
+		server.start();
+		String baseUrl = getBaseUrl(server);
+		MailboxProperties properties =
+				new MailboxProperties(baseUrl, token, true);
+		MailboxProperties properties2 =
+				new MailboxProperties(baseUrl, token2, true);
+
+		// valid response with valid token
+		assertEquals(token2, api.setup(properties));
+		RecordedRequest request1 = server.takeRequest();
+		assertEquals("/setup", request1.getPath());
+		assertEquals("PUT", request1.getMethod());
+		assertToken(request1, token);
+
+		// empty body
+		assertThrows(ApiException.class, () -> api.setup(properties));
+		RecordedRequest request2 = server.takeRequest();
+		assertEquals("/setup", request2.getPath());
+		assertEquals("PUT", request2.getMethod());
+		assertToken(request2, token);
+
+		// invalid response
+		assertThrows(ApiException.class, () -> api.setup(properties));
+		RecordedRequest request3 = server.takeRequest();
+		assertEquals("/setup", request3.getPath());
+		assertEquals("PUT", request3.getMethod());
+		assertToken(request3, token);
+
+		// 401 response
+		assertThrows(ApiException.class, () -> api.setup(properties2));
+		RecordedRequest request4 = server.takeRequest();
+		assertEquals("/setup", request4.getPath());
+		assertEquals("PUT", request4.getMethod());
+		assertToken(request4, token2);
+
+		// 500 response
+		assertThrows(ApiException.class, () -> api.setup(properties));
+		RecordedRequest request5 = server.takeRequest();
+		assertEquals("/setup", request5.getPath());
+		assertEquals("PUT", request5.getMethod());
+		assertToken(request5, token);
+
+		// invalid json dict token response
+		assertThrows(ApiException.class, () -> api.setup(properties));
+		RecordedRequest request6 = server.takeRequest();
+		assertEquals("/setup", request6.getPath());
+		assertEquals("PUT", request6.getMethod());
+		assertToken(request6, token);
+
+		// invalid non-hex string token response
+		assertThrows(ApiException.class, () -> api.setup(properties));
+		RecordedRequest request7 = server.takeRequest();
+		assertEquals("/setup", request7.getPath());
+		assertEquals("PUT", request7.getMethod());
+		assertToken(request7, token);
+	}
+
+	@Test
+	public void testSetupOnlyForOwner() {
+		MailboxProperties properties =
+				new MailboxProperties("", token, false);
+		assertThrows(
+				IllegalArgumentException.class,
+				() -> api.setup(properties)
+		);
+	}
+
+	@Test
+	public void testStatus() throws Exception {
+		MockWebServer server = new MockWebServer();
+		server.enqueue(new MockResponse());
+		server.enqueue(new MockResponse().setResponseCode(401));
+		server.enqueue(new MockResponse().setResponseCode(500));
+		server.start();
+		String baseUrl = getBaseUrl(server);
+		MailboxProperties properties =
+				new MailboxProperties(baseUrl, token, true);
+		MailboxProperties properties2 =
+				new MailboxProperties(baseUrl, token2, true);
+
+		assertTrue(api.checkStatus(properties));
+		RecordedRequest request1 = server.takeRequest();
+		assertEquals("/status", request1.getPath());
+		assertToken(request1, token);
+
+		assertThrows(ApiException.class, () -> api.checkStatus(properties2));
+		RecordedRequest request2 = server.takeRequest();
+		assertEquals("/status", request2.getPath());
+		assertToken(request2, token2);
+
+		assertFalse(api.checkStatus(properties));
+		RecordedRequest request3 = server.takeRequest();
+		assertEquals("/status", request3.getPath());
+		assertToken(request3, token);
+	}
+
+	@Test
+	public void testStatusOnlyForOwner() {
+		MailboxProperties properties =
+				new MailboxProperties("", token, false);
+		assertThrows(
+				IllegalArgumentException.class,
+				() -> api.checkStatus(properties)
+		);
+	}
+
+	@Test
+	public void testWipe() throws Exception {
+		MockWebServer server = new MockWebServer();
+		server.enqueue(new MockResponse().setResponseCode(204));
+		server.enqueue(new MockResponse().setResponseCode(200));
+		server.enqueue(new MockResponse().setResponseCode(401));
+		server.enqueue(new MockResponse().setResponseCode(500));
+		server.start();
+		String baseUrl = getBaseUrl(server);
+		MailboxProperties properties =
+				new MailboxProperties(baseUrl, token, true);
+		MailboxProperties properties2 =
+				new MailboxProperties(baseUrl, token2, true);
+
+		api.wipeMailbox(properties);
+		RecordedRequest request1 = server.takeRequest();
+		assertEquals("/", request1.getPath());
+		assertEquals("DELETE", request1.getMethod());
+		assertToken(request1, token);
+
+		assertThrows(ApiException.class, () -> api.wipeMailbox(properties2));
+		RecordedRequest request2 = server.takeRequest();
+		assertEquals("/", request2.getPath());
+		assertEquals("DELETE", request2.getMethod());
+		assertToken(request2, token2);
+
+		assertThrows(ApiException.class, () -> api.wipeMailbox(properties));
+		RecordedRequest request3 = server.takeRequest();
+		assertEquals("/", request3.getPath());
+		assertEquals("DELETE", request3.getMethod());
+		assertToken(request3, token);
+
+		assertThrows(ApiException.class, () -> api.wipeMailbox(properties));
+		RecordedRequest request4 = server.takeRequest();
+		assertEquals("/", request4.getPath());
+		assertEquals("DELETE", request4.getMethod());
+		assertToken(request4, token);
+	}
+
+	@Test
+	public void testWipeOnlyForOwner() {
+		MailboxProperties properties =
+				new MailboxProperties("", token, false);
+		assertThrows(IllegalArgumentException.class, () ->
+				api.wipeMailbox(properties));
+	}
+
+	@Test
+	public void testAddContact() throws Exception {
+		MockWebServer server = new MockWebServer();
+		server.enqueue(new MockResponse());
+		server.enqueue(new MockResponse().setResponseCode(401));
+		server.enqueue(new MockResponse().setResponseCode(409));
+		server.start();
+		String baseUrl = getBaseUrl(server);
+		MailboxProperties properties =
+				new MailboxProperties(baseUrl, token, true);
+
+		// contact gets added as expected
+		api.addContact(properties, mailboxContact);
+		RecordedRequest request1 = server.takeRequest();
+		assertEquals("/contacts", request1.getPath());
+		assertToken(request1, token);
+		String expected = "{\"contactId\":" + contactId.getInt() +
+				",\"token\":\"" + contactToken +
+				"\",\"inboxId\":\"" + contactInboxId +
+				"\",\"outboxId\":\"" + contactOutboxId +
+				"\"}";
+		assertEquals(expected, request1.getBody().readUtf8());
+
+		// request is not successful
+		assertThrows(ApiException.class, () ->
+				api.addContact(properties, mailboxContact));
+		RecordedRequest request2 = server.takeRequest();
+		assertEquals("/contacts", request2.getPath());
+		assertToken(request2, token);
+
+		// contact already exists
+		assertThrows(TolerableFailureException.class, () ->
+				api.addContact(properties, mailboxContact));
+		RecordedRequest request3 = server.takeRequest();
+		assertEquals("/contacts", request3.getPath());
+		assertToken(request3, token);
+	}
+
+	@Test
+	public void testAddContactOnlyForOwner() {
+		MailboxProperties properties =
+				new MailboxProperties("", token, false);
+		assertThrows(IllegalArgumentException.class, () ->
+				api.addContact(properties, mailboxContact));
+	}
+
+	@Test
+	public void testDeleteContact() throws Exception {
+		MockWebServer server = new MockWebServer();
+		server.enqueue(new MockResponse());
+		server.enqueue(new MockResponse().setResponseCode(205));
+		server.enqueue(new MockResponse().setResponseCode(401));
+		server.enqueue(new MockResponse().setResponseCode(404));
+		server.start();
+		String baseUrl = getBaseUrl(server);
+		MailboxProperties properties =
+				new MailboxProperties(baseUrl, token, true);
+
+		// contact gets deleted as expected
+		api.deleteContact(properties, contactId);
+		RecordedRequest request1 = server.takeRequest();
+		assertEquals("DELETE", request1.getMethod());
+		assertEquals("/contacts/" + contactId.getInt(), request1.getPath());
+		assertToken(request1, token);
+
+		// request is not returning 200
+		assertThrows(ApiException.class, () ->
+				api.deleteContact(properties, contactId));
+		RecordedRequest request2 = server.takeRequest();
+		assertEquals("DELETE", request2.getMethod());
+		assertEquals("/contacts/" + contactId.getInt(), request2.getPath());
+		assertToken(request2, token);
+
+		// request is not authorized
+		assertThrows(ApiException.class, () ->
+				api.deleteContact(properties, contactId));
+		RecordedRequest request3 = server.takeRequest();
+		assertEquals("DELETE", request3.getMethod());
+		assertEquals("/contacts/" + contactId.getInt(), request3.getPath());
+		assertToken(request3, token);
+
+		// tolerable 404 not found error
+		assertThrows(TolerableFailureException.class,
+				() -> api.deleteContact(properties, contactId));
+		RecordedRequest request4 = server.takeRequest();
+		assertEquals("/contacts/" + contactId.getInt(), request4.getPath());
+		assertEquals("DELETE", request4.getMethod());
+		assertToken(request4, token);
+	}
+
+	@Test
+	public void testDeleteContactOnlyForOwner() {
+		MailboxProperties properties =
+				new MailboxProperties("", token, false);
+		assertThrows(IllegalArgumentException.class, () ->
+				api.deleteContact(properties, contactId));
+	}
+
+	@Test
+	public void testGetContacts() throws Exception {
+		ContactId contactId2 = getContactId();
+		String validResponse1 = "{\"contacts\": [" + contactId.getInt() + "] }";
+		String validResponse2 = "{\"contacts\": [" + contactId.getInt() + ", " +
+				contactId2.getInt() + "] }";
+		String invalidResponse1 = "{\"foo\":\"bar\"}";
+		String invalidResponse2 = "{\"contacts\":{\"foo\":\"bar\"}}";
+		String invalidResponse3 = "{\"contacts\": [1, 2, \"foo\"] }";
+
+		MockWebServer server = new MockWebServer();
+		server.enqueue(new MockResponse().setBody(validResponse1));
+		server.enqueue(new MockResponse().setBody(validResponse2));
+		server.enqueue(new MockResponse());
+		server.enqueue(new MockResponse().setBody(invalidResponse1));
+		server.enqueue(new MockResponse().setBody(invalidResponse2));
+		server.enqueue(new MockResponse().setBody(invalidResponse3));
+		server.enqueue(new MockResponse().setResponseCode(401));
+		server.enqueue(new MockResponse().setResponseCode(500));
+		server.start();
+		String baseUrl = getBaseUrl(server);
+		MailboxProperties properties =
+				new MailboxProperties(baseUrl, token, true);
+
+		// valid response with two contacts
+		assertEquals(singletonList(contactId), api.getContacts(properties));
+		RecordedRequest request1 = server.takeRequest();
+		assertEquals("/contacts", request1.getPath());
+		assertEquals("GET", request1.getMethod());
+		assertToken(request1, token);
+
+		// valid response with two contacts
+		List<ContactId> contacts = new ArrayList<>();
+		contacts.add(contactId);
+		contacts.add(contactId2);
+		assertEquals(contacts, api.getContacts(properties));
+		RecordedRequest request2 = server.takeRequest();
+		assertEquals("/contacts", request2.getPath());
+		assertEquals("GET", request2.getMethod());
+		assertToken(request2, token);
+
+		// empty body
+		assertThrows(ApiException.class, () -> api.getContacts(properties));
+		RecordedRequest request3 = server.takeRequest();
+		assertEquals("/contacts", request3.getPath());
+		assertEquals("GET", request3.getMethod());
+		assertToken(request3, token);
+
+		// invalid response: no contacts key
+		assertThrows(ApiException.class, () -> api.getContacts(properties));
+		RecordedRequest request4 = server.takeRequest();
+		assertEquals("/contacts", request4.getPath());
+		assertEquals("GET", request4.getMethod());
+		assertToken(request4, token);
+
+		// invalid response: no list in contacts
+		assertThrows(ApiException.class, () -> api.getContacts(properties));
+		RecordedRequest request5 = server.takeRequest();
+		assertEquals("/contacts", request5.getPath());
+		assertEquals("GET", request5.getMethod());
+		assertToken(request5, token);
+
+		// invalid response: list with non-numbers
+		assertThrows(ApiException.class, () -> api.getContacts(properties));
+		RecordedRequest request6 = server.takeRequest();
+		assertEquals("/contacts", request6.getPath());
+		assertEquals("GET", request6.getMethod());
+		assertToken(request6, token);
+
+		// 401 not authorized
+		assertThrows(ApiException.class, () -> api.getContacts(properties));
+		RecordedRequest request7 = server.takeRequest();
+		assertEquals("/contacts", request7.getPath());
+		assertEquals("GET", request7.getMethod());
+		assertToken(request7, token);
+
+		// 500 internal server error
+		assertThrows(ApiException.class, () -> api.getContacts(properties));
+		RecordedRequest request8 = server.takeRequest();
+		assertEquals("/contacts", request8.getPath());
+		assertEquals("GET", request8.getMethod());
+		assertToken(request8, token);
+	}
+
+	@Test
+	public void testGetContactsOnlyForOwner() {
+		MailboxProperties properties =
+				new MailboxProperties("", token, false);
+		assertThrows(
+				IllegalArgumentException.class,
+				() -> api.getContacts(properties)
+		);
+	}
+
+	@Test
+	public void testAddFile() throws Exception {
+		File file = folder.newFile();
+		byte[] bytes = getRandomBytes(1337);
+		writeBytes(file, bytes);
+
+		MockWebServer server = new MockWebServer();
+		server.enqueue(new MockResponse());
+		server.enqueue(new MockResponse().setResponseCode(401));
+		server.enqueue(new MockResponse().setResponseCode(500));
+		server.start();
+		String baseUrl = getBaseUrl(server);
+		MailboxProperties properties =
+				new MailboxProperties(baseUrl, token, true);
+
+		// file gets uploaded as expected
+		api.addFile(properties, contactInboxId, file);
+		RecordedRequest request1 = server.takeRequest();
+		assertEquals("/files/" + contactInboxId, request1.getPath());
+		assertEquals("POST", request1.getMethod());
+		assertToken(request1, token);
+		assertArrayEquals(bytes, request1.getBody().readByteArray());
+
+		// request is not successful
+		assertThrows(ApiException.class, () ->
+				api.addFile(properties, contactInboxId, file));
+		RecordedRequest request2 = server.takeRequest();
+		assertEquals("/files/" + contactInboxId, request2.getPath());
+		assertEquals("POST", request1.getMethod());
+		assertToken(request2, token);
+
+		// server error
+		assertThrows(ApiException.class, () ->
+				api.addFile(properties, contactInboxId, file));
+		RecordedRequest request3 = server.takeRequest();
+		assertEquals("/files/" + contactInboxId, request3.getPath());
+		assertEquals("POST", request1.getMethod());
+		assertToken(request3, token);
+	}
+
+	@Test
+	public void testGetFiles() throws Exception {
+		MailboxFile mailboxFile1 =
+				new MailboxFile(new MailboxFileId(getRandomId()), 1337);
+		MailboxFile mailboxFile2 =
+				new MailboxFile(new MailboxFileId(getRandomId()),
+						System.currentTimeMillis());
+		String fileResponse1 =
+				new ObjectMapper().writeValueAsString(mailboxFile1);
+		String fileResponse2 =
+				new ObjectMapper().writeValueAsString(mailboxFile2);
+		String validResponse1 = "{\"files\": [" + fileResponse1 + "] }";
+		String validResponse2 = "{\"files\": [" + fileResponse1 + ", " +
+				fileResponse2 + "] }";
+		String invalidResponse1 = "{\"files\":\"bar\"}";
+		String invalidResponse2 = "{\"files\":{\"foo\":\"bar\"}}";
+		String invalidResponse3 = "{\"files\": [" + fileResponse1 + ", 1] }";
+		String invalidResponse4 = "{\"contacts\": [ 1, 2 ] }";
+
+		MockWebServer server = new MockWebServer();
+		server.enqueue(new MockResponse().setBody(validResponse1));
+		server.enqueue(new MockResponse().setBody(validResponse2));
+		server.enqueue(new MockResponse());
+		server.enqueue(new MockResponse().setBody(invalidResponse1));
+		server.enqueue(new MockResponse().setBody(invalidResponse2));
+		server.enqueue(new MockResponse().setBody(invalidResponse3));
+		server.enqueue(new MockResponse().setBody(invalidResponse4));
+		server.enqueue(new MockResponse().setResponseCode(401));
+		server.enqueue(new MockResponse().setResponseCode(500));
+		server.start();
+		String baseUrl = getBaseUrl(server);
+		MailboxProperties properties =
+				new MailboxProperties(baseUrl, token, true);
+
+		// valid response with one file
+		List<MailboxFile> received1 = api.getFiles(properties, contactInboxId);
+		assertEquals(1, received1.size());
+		assertEquals(mailboxFile1.name, received1.get(0).name);
+		assertEquals(mailboxFile1.time, received1.get(0).time);
+		RecordedRequest request1 = server.takeRequest();
+		assertEquals("/files/" + contactInboxId, request1.getPath());
+		assertEquals("GET", request1.getMethod());
+		assertToken(request1, token);
+
+		// valid response with two files
+		List<MailboxFile> received2 = api.getFiles(properties, contactInboxId);
+		assertEquals(2, received2.size());
+		assertEquals(mailboxFile1.name, received2.get(0).name);
+		assertEquals(mailboxFile1.time, received2.get(0).time);
+		assertEquals(mailboxFile2.name, received2.get(1).name);
+		assertEquals(mailboxFile2.time, received2.get(1).time);
+		RecordedRequest request2 = server.takeRequest();
+		assertEquals("/files/" + contactInboxId, request1.getPath());
+		assertEquals("GET", request2.getMethod());
+		assertToken(request2, token);
+
+		// empty body
+		assertThrows(ApiException.class, () ->
+				api.getFiles(properties, contactInboxId));
+		RecordedRequest request3 = server.takeRequest();
+		assertEquals("/files/" + contactInboxId, request3.getPath());
+		assertEquals("GET", request3.getMethod());
+		assertToken(request3, token);
+
+		// invalid response: string instead of list
+		assertThrows(ApiException.class, () ->
+				api.getFiles(properties, contactInboxId));
+		RecordedRequest request4 = server.takeRequest();
+		assertEquals("/files/" + contactInboxId, request4.getPath());
+		assertEquals("GET", request4.getMethod());
+		assertToken(request4, token);
+
+		// invalid response: object instead of list
+		assertThrows(ApiException.class, () ->
+				api.getFiles(properties, contactInboxId));
+		RecordedRequest request5 = server.takeRequest();
+		assertEquals("/files/" + contactInboxId, request5.getPath());
+		assertEquals("GET", request5.getMethod());
+		assertToken(request5, token);
+
+		// invalid response: list with non-objects
+		assertThrows(ApiException.class, () ->
+				api.getFiles(properties, contactInboxId));
+		RecordedRequest request6 = server.takeRequest();
+		assertEquals("/files/" + contactInboxId, request6.getPath());
+		assertEquals("GET", request6.getMethod());
+		assertToken(request6, token);
+
+		// no files key in root object
+		assertThrows(ApiException.class, () ->
+				api.getFiles(properties, contactInboxId));
+		RecordedRequest request7 = server.takeRequest();
+		assertEquals("/files/" + contactInboxId, request7.getPath());
+		assertEquals("GET", request7.getMethod());
+		assertToken(request7, token);
+
+		// 401 not authorized
+		assertThrows(ApiException.class, () ->
+				api.getFiles(properties, contactInboxId));
+		RecordedRequest request8 = server.takeRequest();
+		assertEquals("/files/" + contactInboxId, request8.getPath());
+		assertEquals("GET", request8.getMethod());
+		assertToken(request8, token);
+
+		// 500 internal server error
+		assertThrows(ApiException.class,
+				() -> api.getFiles(properties, contactInboxId));
+		RecordedRequest request9 = server.takeRequest();
+		assertEquals("/files/" + contactInboxId, request9.getPath());
+		assertEquals("GET", request9.getMethod());
+		assertToken(request9, token);
+	}
+
+	@Test
+	public void testGetFile() throws Exception {
+		MailboxFileId name = new MailboxFileId(getRandomId());
+		File file1 = folder.newFile();
+		File file2 = folder.newFile();
+		File file3 = folder.newFile();
+		byte[] bytes = getRandomBytes(1337);
+
+		MockWebServer server = new MockWebServer();
+		server.enqueue(new MockResponse().setBody(new Buffer().write(bytes)));
+		server.enqueue(new MockResponse().setResponseCode(401));
+		server.enqueue(new MockResponse().setResponseCode(500));
+		server.start();
+		String baseUrl = getBaseUrl(server);
+		MailboxProperties properties =
+				new MailboxProperties(baseUrl, token, true);
+
+		// file gets downloaded as expected
+		api.getFile(properties, contactOutboxId, name, file1);
+		RecordedRequest request1 = server.takeRequest();
+		assertEquals("/files/" + contactOutboxId + "/" + name,
+				request1.getPath());
+		assertEquals("GET", request1.getMethod());
+		assertToken(request1, token);
+		assertArrayEquals(bytes, readBytes(file1));
+
+		// request is not successful
+		assertThrows(ApiException.class, () ->
+				api.getFile(properties, contactOutboxId, name, file2));
+		RecordedRequest request2 = server.takeRequest();
+		assertEquals("/files/" + contactOutboxId + "/" + name,
+				request2.getPath());
+		assertEquals("GET", request1.getMethod());
+		assertToken(request2, token);
+		assertEquals(0, readBytes(file2).length);
+
+		// server error
+		assertThrows(ApiException.class, () ->
+				api.getFile(properties, contactOutboxId, name, file3));
+		RecordedRequest request3 = server.takeRequest();
+		assertEquals("/files/" + contactOutboxId + "/" + name,
+				request3.getPath());
+		assertEquals("GET", request1.getMethod());
+		assertToken(request3, token);
+		assertEquals(0, readBytes(file3).length);
+	}
+
+	@Test
+	public void testDeleteFile() throws Exception {
+		MailboxFileId name = new MailboxFileId(getRandomId());
+
+		MockWebServer server = new MockWebServer();
+		server.enqueue(new MockResponse());
+		server.enqueue(new MockResponse().setResponseCode(205));
+		server.enqueue(new MockResponse().setResponseCode(401));
+		server.enqueue(new MockResponse().setResponseCode(404));
+		server.start();
+		String baseUrl = getBaseUrl(server);
+		MailboxProperties properties =
+				new MailboxProperties(baseUrl, token, true);
+
+		// file gets deleted as expected
+		api.deleteFile(properties, contactInboxId, name);
+		RecordedRequest request1 = server.takeRequest();
+		assertEquals("DELETE", request1.getMethod());
+		assertEquals("/files/" + contactInboxId + "/" + name,
+				request1.getPath());
+		assertToken(request1, token);
+
+		// request is not returning 200
+		assertThrows(ApiException.class, () ->
+				api.deleteFile(properties, contactInboxId, name));
+		RecordedRequest request2 = server.takeRequest();
+		assertEquals("DELETE", request2.getMethod());
+		assertEquals("/files/" + contactInboxId + "/" + name,
+				request2.getPath());
+		assertToken(request2, token);
+
+		// request is not authorized
+		assertThrows(ApiException.class, () ->
+				api.deleteFile(properties, contactInboxId, name));
+		RecordedRequest request3 = server.takeRequest();
+		assertEquals("DELETE", request3.getMethod());
+		assertEquals("/files/" + contactInboxId + "/" + name,
+				request3.getPath());
+		assertToken(request3, token);
+
+		// file not found is tolerable
+		assertThrows(TolerableFailureException.class, () ->
+				api.deleteFile(properties, contactInboxId, name));
+		RecordedRequest request4 = server.takeRequest();
+		assertEquals("DELETE", request4.getMethod());
+		assertEquals("/files/" + contactInboxId + "/" + name,
+				request4.getPath());
+		assertToken(request4, token);
+	}
+
+	@Test
+	public void testGetFolders() throws Exception {
+		MailboxFolderId id1 = new MailboxFolderId(getRandomId());
+		MailboxFolderId id2 = new MailboxFolderId(getRandomId());
+		String validResponse1 = "{\"folders\": [ {\"id\": \"" + id1 + "\"} ] }";
+		String validResponse2 = "{\"folders\": [ {\"id\": \"" + id1 + "\"}, " +
+				"{ \"id\": \"" + id2 + "\"} ] }";
+		String invalidResponse1 = "{\"folders\":\"bar\"}";
+		String invalidResponse2 = "{\"folders\":{\"foo\":\"bar\"}}";
+		String invalidResponse3 =
+				"{\"folders\": [ {\"id\": \"" + id1 + "\", 1] }";
+		String invalidResponse4 = "{\"files\": [ 1, 2 ] }";
+
+		MockWebServer server = new MockWebServer();
+		server.enqueue(new MockResponse().setBody(validResponse1));
+		server.enqueue(new MockResponse().setBody(validResponse2));
+		server.enqueue(new MockResponse());
+		server.enqueue(new MockResponse().setBody(invalidResponse1));
+		server.enqueue(new MockResponse().setBody(invalidResponse2));
+		server.enqueue(new MockResponse().setBody(invalidResponse3));
+		server.enqueue(new MockResponse().setBody(invalidResponse4));
+		server.enqueue(new MockResponse().setResponseCode(401));
+		server.enqueue(new MockResponse().setResponseCode(500));
+		server.start();
+		String baseUrl = getBaseUrl(server);
+		MailboxProperties properties =
+				new MailboxProperties(baseUrl, token, true);
+
+		// valid response with one folders
+		assertEquals(singletonList(id1), api.getFolders(properties));
+		RecordedRequest request1 = server.takeRequest();
+		assertEquals("/folders", request1.getPath());
+		assertEquals("GET", request1.getMethod());
+		assertToken(request1, token);
+
+		// valid response with two folders
+		assertEquals(Arrays.asList(id1, id2), api.getFolders(properties));
+		RecordedRequest request2 = server.takeRequest();
+		assertEquals("/folders", request1.getPath());
+		assertEquals("GET", request2.getMethod());
+		assertToken(request2, token);
+
+		// empty body
+		assertThrows(ApiException.class, () -> api.getFolders(properties));
+		RecordedRequest request3 = server.takeRequest();
+		assertEquals("/folders", request3.getPath());
+		assertEquals("GET", request3.getMethod());
+		assertToken(request3, token);
+
+		// invalid response: string instead of list
+		assertThrows(ApiException.class, () -> api.getFolders(properties));
+		RecordedRequest request4 = server.takeRequest();
+		assertEquals("/folders", request4.getPath());
+		assertEquals("GET", request4.getMethod());
+		assertToken(request4, token);
+
+		// invalid response: object instead of list
+		assertThrows(ApiException.class, () -> api.getFolders(properties));
+		RecordedRequest request5 = server.takeRequest();
+		assertEquals("/folders", request5.getPath());
+		assertEquals("GET", request5.getMethod());
+		assertToken(request5, token);
+
+		// invalid response: list with non-objects
+		assertThrows(ApiException.class, () -> api.getFolders(properties));
+		RecordedRequest request6 = server.takeRequest();
+		assertEquals("/folders", request6.getPath());
+		assertEquals("GET", request6.getMethod());
+		assertToken(request6, token);
+
+		// no folders key in root object
+		assertThrows(ApiException.class, () -> api.getFolders(properties));
+		RecordedRequest request7 = server.takeRequest();
+		assertEquals("/folders", request7.getPath());
+		assertEquals("GET", request7.getMethod());
+		assertToken(request7, token);
+
+		// 401 not authorized
+		assertThrows(ApiException.class, () -> api.getFolders(properties));
+		RecordedRequest request8 = server.takeRequest();
+		assertEquals("/folders", request8.getPath());
+		assertEquals("GET", request8.getMethod());
+		assertToken(request8, token);
+
+		// 500 internal server error
+		assertThrows(ApiException.class, () -> api.getFolders(properties));
+		RecordedRequest request9 = server.takeRequest();
+		assertEquals("/folders", request9.getPath());
+		assertEquals("GET", request9.getMethod());
+		assertToken(request9, token);
+	}
+
+	@Test
+	public void testGetFoldersOnlyForOwner() {
+		MailboxProperties properties =
+				new MailboxProperties("", token, false);
+		assertThrows(IllegalArgumentException.class, () ->
+				api.getFolders(properties));
+	}
+
+	private String getBaseUrl(MockWebServer server) {
+		String baseUrl = server.url("").toString();
+		return baseUrl.substring(0, baseUrl.length() - 1);
+	}
+
+	private void assertToken(RecordedRequest request, MailboxId token) {
+		assertNotNull(request.getHeader("Authorization"));
+		assertEquals("Bearer " + token, request.getHeader("Authorization"));
+	}
+
+}

bramble-core/src/test/java/org/briarproject/bramble/mailbox/MailboxIntegrationTest.java

@@ -0,0 +1,272 @@
+package org.briarproject.bramble.mailbox;
+
+import org.briarproject.bramble.api.WeakSingletonProvider;
+import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.mailbox.InvalidMailboxIdException;
+import org.briarproject.bramble.api.mailbox.MailboxAuthToken;
+import org.briarproject.bramble.api.mailbox.MailboxFileId;
+import org.briarproject.bramble.api.mailbox.MailboxFolderId;
+import org.briarproject.bramble.api.mailbox.MailboxProperties;
+import org.briarproject.bramble.mailbox.MailboxApi.ApiException;
+import org.briarproject.bramble.mailbox.MailboxApi.MailboxContact;
+import org.briarproject.bramble.mailbox.MailboxApi.MailboxFile;
+import org.briarproject.bramble.mailbox.MailboxApi.TolerableFailureException;
+import org.briarproject.bramble.test.BrambleTestCase;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+
+import javax.annotation.Nonnull;
+import javax.net.SocketFactory;
+
+import okhttp3.OkHttpClient;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
+import static org.briarproject.bramble.test.TestUtils.getRandomId;
+import static org.briarproject.bramble.test.TestUtils.isOptionalTestEnabled;
+import static org.briarproject.bramble.test.TestUtils.readBytes;
+import static org.briarproject.bramble.test.TestUtils.writeBytes;
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThrows;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assume.assumeTrue;
+
+public class MailboxIntegrationTest extends BrambleTestCase {
+
+	@Rule
+	public TemporaryFolder folder = new TemporaryFolder();
+
+	private final static String URL_BASE = "http://127.0.0.1:8000";
+	private final static MailboxAuthToken SETUP_TOKEN;
+
+	static {
+		try {
+			SETUP_TOKEN = MailboxAuthToken.fromString(
+					"54686973206973206120736574757020746f6b656e20666f722042726961722e");
+		} catch (InvalidMailboxIdException e) {
+			throw new IllegalStateException();
+		}
+	}
+
+	private static final OkHttpClient client = new OkHttpClient.Builder()
+			.socketFactory(SocketFactory.getDefault())
+			.connectTimeout(60_000, MILLISECONDS)
+			.build();
+	private static final WeakSingletonProvider<OkHttpClient>
+			httpClientProvider =
+			new WeakSingletonProvider<OkHttpClient>() {
+				@Override
+				@Nonnull
+				public OkHttpClient createInstance() {
+					return client;
+				}
+			};
+	private final static MailboxApiImpl api =
+			new MailboxApiImpl(httpClientProvider);
+	// needs to be static to keep values across different tests
+	private static MailboxProperties ownerProperties;
+
+	/**
+	 * Called before each test to make sure the mailbox is setup once
+	 * before starting with individual tests.
+	 * {@link BeforeClass} needs to be static, so we can't use the API class.
+	 */
+	@Before
+	public void ensureSetup() throws IOException, ApiException {
+		// Skip this test unless it's explicitly enabled in the environment
+		assumeTrue(isOptionalTestEnabled(MailboxIntegrationTest.class));
+
+		if (ownerProperties != null) return;
+		MailboxProperties setupProperties =
+				new MailboxProperties(URL_BASE, SETUP_TOKEN, true);
+		MailboxAuthToken ownerToken = api.setup(setupProperties);
+		ownerProperties = new MailboxProperties(URL_BASE, ownerToken, true);
+	}
+
+	@AfterClass
+	// we can't test wiping as a regular test as it stops the mailbox
+	public static void wipe() throws IOException, ApiException {
+		if (!isOptionalTestEnabled(MailboxIntegrationTest.class)) return;
+		
+		api.wipeMailbox(ownerProperties);
+
+		// check doesn't work anymore
+		assertThrows(ApiException.class, () ->
+				api.checkStatus(ownerProperties));
+
+		// new setup doesn't work as mailbox is stopping
+		MailboxProperties setupProperties =
+				new MailboxProperties(URL_BASE, SETUP_TOKEN, true);
+		assertThrows(ApiException.class, () -> api.setup(setupProperties));
+	}
+
+	@Test
+	public void testStatus() throws Exception {
+		assertTrue(api.checkStatus(ownerProperties));
+	}
+
+	@Test
+	public void testContactApi() throws Exception {
+		ContactId contactId1 = new ContactId(1);
+		ContactId contactId2 = new ContactId(2);
+		MailboxContact mailboxContact1 = getMailboxContact(contactId1);
+		MailboxContact mailboxContact2 = getMailboxContact(contactId2);
+
+		// no contacts initially
+		assertEquals(emptyList(), api.getContacts(ownerProperties));
+		// added contact gets returned
+		api.addContact(ownerProperties, mailboxContact1);
+		assertEquals(singletonList(contactId1),
+				api.getContacts(ownerProperties));
+		// second contact also gets returned
+		api.addContact(ownerProperties, mailboxContact2);
+		assertEquals(Arrays.asList(contactId1, contactId2),
+				api.getContacts(ownerProperties));
+
+		// after both contacts get deleted, the list is empty again
+		api.deleteContact(ownerProperties, contactId1);
+		api.deleteContact(ownerProperties, contactId2);
+		assertEquals(emptyList(), api.getContacts(ownerProperties));
+
+		// deleting again is tolerable
+		assertThrows(TolerableFailureException.class,
+				() -> api.deleteContact(ownerProperties, contactId2));
+	}
+
+	@Test
+	public void testFileManagementApi() throws Exception {
+		// add contact, so we can leave each other files
+		ContactId contactId = new ContactId(1);
+		MailboxContact contact = getMailboxContact(contactId);
+		MailboxProperties contactProperties = new MailboxProperties(
+				ownerProperties.getBaseUrl(), contact.token, false);
+		api.addContact(ownerProperties, contact);
+
+		// upload a file for our contact
+		File file1 = folder.newFile();
+		byte[] bytes1 = getRandomBytes(2048);
+		writeBytes(file1, bytes1);
+		api.addFile(ownerProperties, contact.inboxId, file1);
+
+		// contact checks files
+		List<MailboxFile> files1 =
+				api.getFiles(contactProperties, contact.inboxId);
+		assertEquals(1, files1.size());
+		MailboxFileId fileName1 = files1.get(0).name;
+
+		// owner can't check files
+		assertThrows(ApiException.class, () ->
+				api.getFiles(ownerProperties, contact.inboxId));
+
+		// contact downloads file
+		File file1downloaded = folder.newFile();
+		api.getFile(contactProperties, contact.inboxId, fileName1,
+				file1downloaded);
+		assertArrayEquals(bytes1, readBytes(file1downloaded));
+
+		// owner can't download file, even if knowing name
+		File file1forbidden = folder.newFile();
+		assertThrows(ApiException.class, () -> api.getFile(ownerProperties,
+				contact.inboxId, fileName1, file1forbidden));
+		assertEquals(0, file1forbidden.length());
+
+		// owner can't delete file
+		assertThrows(ApiException.class, () ->
+				api.deleteFile(ownerProperties, contact.inboxId, fileName1));
+
+		// contact deletes file
+		api.deleteFile(contactProperties, contact.inboxId, fileName1);
+		assertEquals(0,
+				api.getFiles(contactProperties, contact.inboxId).size());
+
+		// contact uploads two files for the owner
+		File file2 = folder.newFile();
+		File file3 = folder.newFile();
+		byte[] bytes2 = getRandomBytes(2048);
+		byte[] bytes3 = getRandomBytes(1024);
+		writeBytes(file2, bytes2);
+		writeBytes(file3, bytes3);
+		api.addFile(contactProperties, contact.outboxId, file2);
+		api.addFile(contactProperties, contact.outboxId, file3);
+
+		// owner checks folders with available files
+		List<MailboxFolderId> folders = api.getFolders(ownerProperties);
+		assertEquals(singletonList(contact.outboxId), folders);
+
+		// owner lists files in contact's outbox
+		List<MailboxFile> files2 =
+				api.getFiles(ownerProperties, contact.outboxId);
+		assertEquals(2, files2.size());
+		MailboxFileId file2name = files2.get(0).name;
+		MailboxFileId file3name = files2.get(1).name;
+
+		// contact can't list files in contact's outbox
+		assertThrows(ApiException.class, () ->
+				api.getFiles(contactProperties, contact.outboxId));
+
+		// owner downloads both files from contact's outbox
+		File file2downloaded = folder.newFile();
+		File file3downloaded = folder.newFile();
+		api.getFile(ownerProperties, contact.outboxId, file2name,
+				file2downloaded);
+		api.getFile(ownerProperties, contact.outboxId, file3name,
+				file3downloaded);
+		byte[] downloadedBytes2 = readBytes(file2downloaded);
+		byte[] downloadedBytes3 = readBytes(file3downloaded);
+		// file order is preserved (sorted by time),
+		// so we know what file is which
+		assertArrayEquals(bytes2, downloadedBytes2);
+		assertArrayEquals(bytes3, downloadedBytes3);
+
+		// contact can't download files again, even if knowing name
+		File file2forbidden = folder.newFile();
+		File file3forbidden = folder.newFile();
+		assertThrows(ApiException.class, () -> api.getFile(contactProperties,
+				contact.outboxId, file2name, file2forbidden));
+		assertThrows(ApiException.class, () -> api.getFile(contactProperties,
+				contact.outboxId, file3name, file3forbidden));
+		assertEquals(0, file1forbidden.length());
+		assertEquals(0, file2forbidden.length());
+
+		// contact can't delete files in outbox
+		assertThrows(ApiException.class, () ->
+				api.deleteFile(contactProperties, contact.outboxId, file2name));
+		assertThrows(ApiException.class, () ->
+				api.deleteFile(contactProperties, contact.outboxId, file3name));
+
+		// owner deletes files
+		api.deleteFile(ownerProperties, contact.outboxId, file2name);
+		api.deleteFile(ownerProperties, contact.outboxId, file3name);
+		assertEquals(emptyList(),
+				api.getFiles(ownerProperties, contact.outboxId));
+		assertEquals(emptyList(), api.getFolders(ownerProperties));
+
+		// deleting a non-existent file is tolerable
+		assertThrows(TolerableFailureException.class, () ->
+				api.deleteFile(ownerProperties, contact.outboxId, file3name));
+
+		// owner deletes contact again to leave clean state for other tests
+		api.deleteContact(ownerProperties, contactId);
+		assertEquals(emptyList(), api.getContacts(ownerProperties));
+	}
+
+	private MailboxContact getMailboxContact(ContactId contactId) {
+		MailboxAuthToken authToken = new MailboxAuthToken(getRandomId());
+		MailboxFolderId inboxId = new MailboxFolderId(getRandomId());
+		MailboxFolderId outboxId = new MailboxFolderId(getRandomId());
+		return new MailboxContact(contactId, authToken, inboxId, outboxId);
+	}
+
+}

bramble-core/src/test/java/org/briarproject/bramble/mailbox/MailboxPairingTaskImplTest.java

@@ -0,0 +1,196 @@
+package org.briarproject.bramble.mailbox;
+
+import org.briarproject.bramble.api.crypto.CryptoComponent;
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.db.Transaction;
+import org.briarproject.bramble.api.db.TransactionManager;
+import org.briarproject.bramble.api.mailbox.MailboxAuthToken;
+import org.briarproject.bramble.api.mailbox.MailboxPairingState;
+import org.briarproject.bramble.api.mailbox.MailboxPairingTask;
+import org.briarproject.bramble.api.mailbox.MailboxProperties;
+import org.briarproject.bramble.api.mailbox.MailboxSettingsManager;
+import org.briarproject.bramble.api.system.Clock;
+import org.briarproject.bramble.test.BrambleMockTestCase;
+import org.briarproject.bramble.test.DbExpectations;
+import org.briarproject.bramble.test.ImmediateExecutor;
+import org.briarproject.bramble.test.PredicateMatcher;
+import org.jmock.Expectations;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.charset.Charset;
+import java.util.concurrent.Executor;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
+import static org.briarproject.bramble.test.TestUtils.getRandomId;
+import static org.briarproject.bramble.util.StringUtils.getRandomString;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+public class MailboxPairingTaskImplTest extends BrambleMockTestCase {
+
+	private final Executor executor = new ImmediateExecutor();
+	private final TransactionManager db =
+			context.mock(TransactionManager.class);
+	private final CryptoComponent crypto = context.mock(CryptoComponent.class);
+	private final Clock clock = context.mock(Clock.class);
+	private final MailboxApi api = context.mock(MailboxApi.class);
+	private final MailboxSettingsManager mailboxSettingsManager =
+			context.mock(MailboxSettingsManager.class);
+	private final MailboxPairingTaskFactory factory =
+			new MailboxPairingTaskFactoryImpl(executor, db, crypto, clock, api,
+					mailboxSettingsManager);
+
+	private final String onion = getRandomString(56);
+	private final byte[] onionBytes = getRandomBytes(32);
+	private final String onionAddress = "http://" + onion + ".onion";
+	private final MailboxAuthToken setupToken =
+			new MailboxAuthToken(getRandomId());
+	private final MailboxAuthToken ownerToken =
+			new MailboxAuthToken(getRandomId());
+	private final String validPayload = getValidPayload();
+	private final long time = System.currentTimeMillis();
+	private final MailboxProperties setupProperties =
+			new MailboxProperties(onionAddress, setupToken, true);
+	private final MailboxProperties ownerProperties =
+			new MailboxProperties(onionAddress, ownerToken, true);
+
+	@Test
+	public void testInitialQrCodeReceivedState() {
+		MailboxPairingTask task =
+				factory.createPairingTask(getRandomString(42));
+		task.addObserver(state ->
+				assertTrue(state instanceof MailboxPairingState.QrCodeReceived)
+		);
+	}
+
+	@Test
+	public void testInvalidQrCode() {
+		MailboxPairingTask task1 =
+				factory.createPairingTask(getRandomString(42));
+		task1.run();
+		task1.addObserver(state ->
+				assertTrue(state instanceof MailboxPairingState.InvalidQrCode)
+		);
+
+		String goodLength = "00" + getRandomString(63);
+		MailboxPairingTask task2 = factory.createPairingTask(goodLength);
+		task2.run();
+		task2.addObserver(state ->
+				assertTrue(state instanceof MailboxPairingState.InvalidQrCode)
+		);
+	}
+
+	@Test
+	public void testSuccessfulPairing() throws Exception {
+		context.checking(new Expectations() {{
+			oneOf(crypto).encodeOnionAddress(onionBytes);
+			will(returnValue(onion));
+			oneOf(api).setup(with(matches(setupProperties)));
+			will(returnValue(ownerToken));
+			oneOf(clock).currentTimeMillis();
+			will(returnValue(time));
+		}});
+		Transaction txn = new Transaction(null, false);
+		context.checking(new DbExpectations() {{
+			oneOf(db).transaction(with(false), withDbRunnable(txn));
+			oneOf(mailboxSettingsManager).setOwnMailboxProperties(
+					with(txn), with(matches(ownerProperties)));
+			oneOf(mailboxSettingsManager).recordSuccessfulConnection(txn, time);
+		}});
+
+		AtomicInteger i = new AtomicInteger(0);
+		MailboxPairingTask task = factory.createPairingTask(validPayload);
+		task.addObserver(state -> {
+			if (i.get() == 0) {
+				assertEquals(MailboxPairingState.QrCodeReceived.class,
+						state.getClass());
+			} else if (i.get() == 1) {
+				assertEquals(MailboxPairingState.Pairing.class,
+						state.getClass());
+			} else if (i.get() == 2) {
+				assertEquals(MailboxPairingState.Paired.class,
+						state.getClass());
+			} else fail("Unexpected change of state " + state.getClass());
+			i.getAndIncrement();
+		});
+		task.run();
+	}
+
+	@Test
+	public void testAlreadyPaired() throws Exception {
+		testApiException(new MailboxApi.MailboxAlreadyPairedException(),
+				MailboxPairingState.MailboxAlreadyPaired.class);
+	}
+
+	@Test
+	public void testMailboxApiException() throws Exception {
+		testApiException(new MailboxApi.ApiException(),
+				MailboxPairingState.UnexpectedError.class);
+	}
+
+	@Test
+	public void testApiIOException() throws Exception {
+		testApiException(new IOException(),
+				MailboxPairingState.ConnectionError.class);
+	}
+
+	private void testApiException(Exception e,
+			Class<? extends MailboxPairingState> s) throws Exception {
+		context.checking(new Expectations() {{
+			oneOf(crypto).encodeOnionAddress(onionBytes);
+			will(returnValue(onion));
+			oneOf(api).setup(with(matches(setupProperties)));
+			will(throwException(e));
+		}});
+
+		MailboxPairingTask task = factory.createPairingTask(validPayload);
+		task.run();
+		task.addObserver(state -> assertEquals(state.getClass(), s));
+	}
+
+	@Test
+	public void testDbException() throws Exception {
+		context.checking(new Expectations() {{
+			oneOf(crypto).encodeOnionAddress(onionBytes);
+			will(returnValue(onion));
+			oneOf(api).setup(with(matches(setupProperties)));
+			will(returnValue(ownerToken));
+			oneOf(clock).currentTimeMillis();
+			will(returnValue(time));
+		}});
+		Transaction txn = new Transaction(null, false);
+		context.checking(new DbExpectations() {{
+			oneOf(db).transaction(with(false), withDbRunnable(txn));
+			oneOf(mailboxSettingsManager).setOwnMailboxProperties(
+					with(txn), with(matches(ownerProperties)));
+			will(throwException(new DbException()));
+		}});
+
+		MailboxPairingTask task = factory.createPairingTask(validPayload);
+		task.run();
+		task.addObserver(state -> assertEquals(state.getClass(),
+				MailboxPairingState.UnexpectedError.class));
+	}
+
+	private String getValidPayload() {
+		byte[] payloadBytes = ByteBuffer.allocate(65)
+				.put((byte) 32) // 1
+				.put(onionBytes) // 32
+				.put(setupToken.getBytes()) // 32
+				.array();
+		//noinspection CharsetObjectCanBeUsed
+		return new String(payloadBytes, Charset.forName("ISO-8859-1"));
+	}
+
+	private PredicateMatcher<MailboxProperties> matches(MailboxProperties p2) {
+		return new PredicateMatcher<>(MailboxProperties.class, p1 ->
+				p1.getAuthToken().equals(p2.getAuthToken()) &&
+						p1.getBaseUrl().equals(p2.getBaseUrl()) &&
+						p1.isOwner() == p2.isOwner());
+	}
+
+}

bramble-core/src/test/java/org/briarproject/bramble/mailbox/MailboxSettingsManagerImplTest.java

@@ -2,6 +2,7 @@ package org.briarproject.bramble.mailbox;
 
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.db.Transaction;
+import org.briarproject.bramble.api.mailbox.MailboxAuthToken;
 import org.briarproject.bramble.api.mailbox.MailboxProperties;
 import org.briarproject.bramble.api.mailbox.MailboxSettingsManager;
 import org.briarproject.bramble.api.mailbox.MailboxStatus;
@@ -20,6 +21,7 @@ import static org.briarproject.bramble.mailbox.MailboxSettingsManagerImpl.SETTIN
 import static org.briarproject.bramble.mailbox.MailboxSettingsManagerImpl.SETTINGS_KEY_TOKEN;
 import static org.briarproject.bramble.mailbox.MailboxSettingsManagerImpl.SETTINGS_NAMESPACE;
 import static org.briarproject.bramble.mailbox.MailboxSettingsManagerImpl.SETTINGS_UPLOADS_NAMESPACE;
+import static org.briarproject.bramble.test.TestUtils.getRandomId;
 import static org.briarproject.bramble.util.StringUtils.getRandomString;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -35,7 +37,7 @@ public class MailboxSettingsManagerImplTest extends BrambleMockTestCase {
 			new MailboxSettingsManagerImpl(settingsManager);
 	private final Random random = new Random();
 	private final String onion = getRandomString(64);
-	private final String token = getRandomString(64);
+	private final MailboxAuthToken token = new MailboxAuthToken(getRandomId());
 	private final ContactId contactId1 = new ContactId(random.nextInt());
 	private final ContactId contactId2 = new ContactId(random.nextInt());
 	private final ContactId contactId3 = new ContactId(random.nextInt());
@@ -62,7 +64,7 @@ public class MailboxSettingsManagerImplTest extends BrambleMockTestCase {
 		Transaction txn = new Transaction(null, true);
 		Settings settings = new Settings();
 		settings.put(SETTINGS_KEY_ONION, onion);
-		settings.put(SETTINGS_KEY_TOKEN, token);
+		settings.put(SETTINGS_KEY_TOKEN, token.toString());
 
 		context.checking(new Expectations() {{
 			oneOf(settingsManager).getSettings(txn, SETTINGS_NAMESPACE);
@@ -71,7 +73,7 @@ public class MailboxSettingsManagerImplTest extends BrambleMockTestCase {
 
 		MailboxProperties properties = manager.getOwnMailboxProperties(txn);
 		assertNotNull(properties);
-		assertEquals(onion, properties.getOnionAddress());
+		assertEquals(onion, properties.getBaseUrl());
 		assertEquals(token, properties.getAuthToken());
 		assertTrue(properties.isOwner());
 	}
@@ -81,7 +83,7 @@ public class MailboxSettingsManagerImplTest extends BrambleMockTestCase {
 		Transaction txn = new Transaction(null, false);
 		Settings expectedSettings = new Settings();
 		expectedSettings.put(SETTINGS_KEY_ONION, onion);
-		expectedSettings.put(SETTINGS_KEY_TOKEN, token);
+		expectedSettings.put(SETTINGS_KEY_TOKEN, token.toString());
 		MailboxProperties properties =
 				new MailboxProperties(onion, token, true);
 
@@ -180,7 +182,7 @@ public class MailboxSettingsManagerImplTest extends BrambleMockTestCase {
 		Transaction txn = new Transaction(null, true);
 		Settings settings = new Settings();
 		settings.put(String.valueOf(contactId1.getInt()), onion);
-		settings.put(String.valueOf(contactId2.getInt()), token);
+		settings.put(String.valueOf(contactId2.getInt()), token.toString());
 		settings.put(String.valueOf(contactId3.getInt()), "");
 
 		context.checking(new Expectations() {{
@@ -192,7 +194,8 @@ public class MailboxSettingsManagerImplTest extends BrambleMockTestCase {
 		String filename1 = manager.getPendingUpload(txn, contactId1);
 		assertEquals(onion, filename1);
 		String filename2 = manager.getPendingUpload(txn, contactId2);
-		assertEquals(token, filename2);
+		assertNotNull(filename2);
+		assertEquals(token.toString(), filename2);
 		String filename3 = manager.getPendingUpload(txn, contactId3);
 		assertNull(filename3);
 		String filename4 =

bramble-core/src/test/java/org/briarproject/bramble/plugin/PollerImplTest.java

@@ -25,7 +25,7 @@ import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.briarproject.bramble.test.ImmediateExecutor;
 import org.briarproject.bramble.test.RunAction;
 import org.jmock.Expectations;
-import org.jmock.lib.legacy.ClassImposteriser;
+import org.jmock.imposters.ByteBuddyClassImposteriser;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -69,7 +69,7 @@ public class PollerImplTest extends BrambleMockTestCase {
 	private PollerImpl poller;
 
 	public PollerImplTest() {
-		context.setImposteriser(ClassImposteriser.INSTANCE);
+		context.setImposteriser(ByteBuddyClassImposteriser.INSTANCE);
 		random = context.mock(SecureRandom.class);
 	}
 

bramble-core/src/test/java/org/briarproject/bramble/test/TestFeatureFlagModule.java

@@ -24,6 +24,26 @@ public class TestFeatureFlagModule {
 			public boolean shouldEnableDisappearingMessages() {
 				return true;
 			}
+
+			@Override
+			public boolean shouldEnableMailbox() {
+				return true;
+			}
+
+			@Override
+			public boolean shouldEnablePrivateGroupsInCore() {
+				return true;
+			}
+
+			@Override
+			public boolean shouldEnableForumsInCore() {
+				return true;
+			}
+
+			@Override
+			public boolean shouldEnableBlogsInCore() {
+				return true;
+			}
 		};
 	}
 }

bramble-core/witness.gradle

@@ -1,6 +1,9 @@
 dependencyVerification {
     verify = [
         'cglib:cglib:3.2.8:cglib-3.2.8.jar:3f64de999ecc5595dc84ca8ff0879d8a34c8623f9ef3c517a53ed59023fcb9db',
+        'com.fasterxml.jackson.core:jackson-annotations:2.13.0:jackson-annotations-2.13.0.jar:81f9724d8843e8b08f8f6c0609e7a2b030d00c34861c4ac7e2099a7235047d6f',
+        'com.fasterxml.jackson.core:jackson-core:2.13.0:jackson-core-2.13.0.jar:348bc59b348df2e807b356f1d62d2afb41a974073328abc773eb0932b855d2c8',
+        'com.fasterxml.jackson.core:jackson-databind:2.13.0:jackson-databind-2.13.0.jar:9c826d27176268777adcf97e1c6e2051c7e33a7aaa2c370c2e8c6077fd9da3f4',
         'com.google.code.findbugs:annotations:3.0.1:annotations-3.0.1.jar:6b47ff0a6de0ce17cbedc3abb0828ca5bce3009d53ea47b3723ff023c4742f79',
         'com.google.code.findbugs:jsr305:3.0.2:jsr305-3.0.2.jar:766ad2a0783f2687962c8ad74ceecc38a28b9f72a2d085ee438b7813e928d0c7',
         'com.google.dagger:dagger-compiler:2.33:dagger-compiler-2.33.jar:aa8a0d8370c578fd6999802d0d90b9829377a46d2c1141e11b8f737970e7155e',
@@ -15,6 +18,11 @@ dependencyVerification {
         'com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava:listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar:b372a037d4230aa57fbeffdef30fd6123f9c0c2db85d0aced00c91b974f33f99',
         'com.google.j2objc:j2objc-annotations:1.1:j2objc-annotations-1.1.jar:2994a7eb78f2710bd3d3bfb639b2c94e219cedac0d4d084d516e78c16dddecf6',
         'com.h2database:h2:1.4.192:h2-1.4.192.jar:225b22e9857235c46c93861410b60b8c81c10dc8985f4faf188985ba5445126c',
+        'com.squareup.okhttp3:mockwebserver:4.9.3:mockwebserver-4.9.3.jar:9c8c581c29f22f877a35d11380462f75bb24bf1886204fe835ee695594a2784e',
+        'com.squareup.okhttp3:okhttp:3.12.13:okhttp-3.12.13.jar:508234e024ef7e270ab1a6d5b356f5b98e786511239ca986d684fd1e2cf7bc82',
+        'com.squareup.okhttp3:okhttp:4.9.3:okhttp-4.9.3.jar:93ecd6cba19d87dccfe566ec848d91aae799e3cf16c00709358ea69bd9227219',
+        'com.squareup.okio:okio:1.15.0:okio-1.15.0.jar:693fa319a7e8843300602b204023b7674f106ebcb577f2dd5807212b66118bd2',
+        'com.squareup.okio:okio:2.8.0:okio-jvm-2.8.0.jar:4496b06e73982fcdd8a5393f46e5df2ce2fa4465df5895454cac68a32f09bbc8',
         'com.squareup:javapoet:1.13.0:javapoet-1.13.0.jar:4c7517e848a71b36d069d12bb3bf46a70fd4cda3105d822b0ed2e19c00b69291',
         'javax.annotation:jsr250-api:1.0:jsr250-api-1.0.jar:a1a922d0d9b6d183ed3800dfac01d1e1eb159f0e8c6f94736931c1def54a941f',
         'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
@@ -26,7 +34,7 @@ dependencyVerification {
         'net.ltgt.gradle.incap:incap:0.2:incap-0.2.jar:b625b9806b0f1e4bc7a2e3457119488de3cd57ea20feedd513db070a573a4ffd',
         'org.apache-extras.beanshell:bsh:2.0b6:bsh-2.0b6.jar:a17955976070c0573235ee662f2794a78082758b61accffce8d3f8aedcd91047',
         'org.bitlet:weupnp:0.1.4:weupnp-0.1.4.jar:88df7e6504929d00bdb832863761385c68ab92af945b04f0770b126270a444fb',
-        'org.bouncycastle:bcprov-jdk15on:1.69:bcprov-jdk15on-1.69.jar:e469bd39f936999f256002631003ff022a22951da9d5bd9789c7abfa9763a292',
+        'org.bouncycastle:bcprov-jdk15to18:1.70:bcprov-jdk15to18-1.70.jar:7df4c54f29ce2dd616dc3b198ca4db3dfcc79e3cb397c084a0aff97b85c0bf38',
         'org.briarproject:jtorctl:0.3:jtorctl-0.3.jar:f2939238a097898998432effe93b0334d97a787972ab3a91a8973a1d309fc864',
         'org.checkerframework:checker-compat-qual:2.5.3:checker-compat-qual-2.5.3.jar:d76b9afea61c7c082908023f0cbc1427fab9abd2df915c8b8a3e7a509bccbc6d',
         'org.checkerframework:checker-qual:2.5.2:checker-qual-2.5.2.jar:64b02691c8b9d4e7700f8ee2e742dce7ea2c6e81e662b7522c9ee3bf568c040a',
@@ -38,7 +46,11 @@ dependencyVerification {
         'org.hamcrest:hamcrest-library:2.1:hamcrest-library-2.1.jar:b7e2b6895b3b679f0e47b6380fda391b225e9b78505db9d8bdde8d3cc8d52a21',
         'org.hamcrest:hamcrest:2.1:hamcrest-2.1.jar:ba93b2e3a562322ba432f0a1b53addcc55cb188253319a020ed77f824e692050',
         'org.hsqldb:hsqldb:2.3.5:hsqldb-2.3.5.jar:6676a6977ac98997a80f827ddbd3fe8ca1e0853dad1492512135fd1a222ccfad',
+        'org.jetbrains.kotlin:kotlin-stdlib-common:1.4.10:kotlin-stdlib-common-1.4.10.jar:4681f2d436a68c7523595d84ed5758e1382f9da0f67c91e6a848690d711274fe',
         'org.jetbrains.kotlin:kotlin-stdlib-common:1.4.20:kotlin-stdlib-common-1.4.20.jar:a7112c9b3cefee418286c9c9372f7af992bd1e6e030691d52f60cb36dbec8320',
+        'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.4.10:kotlin-stdlib-jdk7-1.4.10.jar:f9566380c08722c780ce33ceee23e98ddf765ca98fabd3e2fabae7975c8d232b',
+        'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.4.10:kotlin-stdlib-jdk8-1.4.10.jar:39b7a9442d7a3865e0f4a732c56c1d5da0e11ffb3bb82a461d32deb0c0ca7673',
+        'org.jetbrains.kotlin:kotlin-stdlib:1.4.10:kotlin-stdlib-1.4.10.jar:01ecb09782c042b931c1839acf21a188340b295d05400afd6e3415d4475b8daa',
         'org.jetbrains.kotlin:kotlin-stdlib:1.4.20:kotlin-stdlib-1.4.20.jar:b8ab1da5cdc89cb084d41e1f28f20a42bd431538642a5741c52bbfae3fa3e656',
         'org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.1.0:kotlinx-metadata-jvm-0.1.0.jar:9753bb39efef35957c5c15df9a3cb769aabf2cdfa74b47afcb7760e5146be3b5',
         'org.jetbrains:annotations:13.0:annotations-13.0.jar:ace2a10dc8e2d5fd34925ecac03e4988b2c0f851650c94b8cef49ba1bd111478',

bramble-java/build.gradle

@@ -27,7 +27,6 @@ dependencies {
 	testImplementation "junit:junit:$junit_version"
 	testImplementation "org.jmock:jmock:$jmock_version"
 	testImplementation "org.jmock:jmock-junit4:$jmock_version"
-	testImplementation "org.jmock:jmock-legacy:$jmock_version"
 
 	testAnnotationProcessor "com.google.dagger:dagger-compiler:$dagger_version"
 }

briar-android/artwork/ic_mailbox.svg

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" version="1.1" id="svg4"
+    sodipodi:docname="ic_mailbox.svg" inkscape:version="1.1.1 (3bf5ae0d25, 2021-09-20)"
+    xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+    xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+    xmlns="http://www.w3.org/2000/svg">
+  <defs id="defs8" />
+  <sodipodi:namedview id="namedview6" pagecolor="#7d7d7d" bordercolor="#666666" borderopacity="1.0"
+      inkscape:pageshadow="2" inkscape:pageopacity="0" inkscape:pagecheckerboard="0"
+      showgrid="false" inkscape:zoom="9.0780032" inkscape:cx="22.086355" inkscape:cy="10.850404"
+      inkscape:window-width="1920" inkscape:window-height="928" inkscape:window-x="0"
+      inkscape:window-y="108" inkscape:window-maximized="1" inkscape:current-layer="svg4" />
+  <path
+      d="m 5.0781637,2.0000001 c -0.5245356,0 -1.0278314,0.2105185 -1.3987365,0.5847785 C 3.3085215,2.9590375 3.1,3.4663153 3.1,3.9956004 V 16.767666 c 0,0.529289 0.2085215,1.037692 0.5794272,1.411969 0.3709051,0.37423 0.8742009,0.583635 1.3987365,0.583635 H 15.850874 l 3.588966,3.026135 C 20.019297,22.277986 20.9,21.862034 20.9,21.100087 V 3.9956004 C 20.9,3.4663153 20.691473,2.9590375 20.32057,2.5847786 19.949681,2.2105186 19.44635,2.0000001 18.921831,2.0000001 Z M 6.2648311,5.19273 H 17.73517 v 5.65018 h -4.00732 v 1.954238 h 1.465946 c 0.26433,0 0.396594,0.32267 0.209762,0.511253 l -3.160194,3.188138 c -0.11588,0.116871 -0.303625,0.116871 -0.419503,0 L 8.6636588,13.308401 C 8.4767702,13.119818 8.6091068,12.797148 8.8734113,12.797148 H 10.339359 V 10.84291 H 6.2648311 Z"
+      fill="white" id="path2" style="fill:#ffffff;stroke:none;stroke-width:0.590769" />
+</svg>

briar-android/artwork/mailbox_onboarding_dark.svg

@@ -0,0 +1,105 @@
+<svg width="250" height="199" viewBox="0 0 250 199" fill="none" xmlns="http://www.w3.org/2000/svg">
+	<path
+		d="M95.4363 100.233C95.4363 93.5233 100.876 88.084 107.585 88.084H130.365C137.074 88.084 142.514 93.5233 142.514 100.233V123.012C142.514 129.722 137.074 135.161 130.365 135.161H107.585C100.876 135.161 95.4363 129.722 95.4363 123.012V100.233Z"
+		fill="#15212D" />
+	<path
+		d="M102.336 10.2609C102.336 4.59395 106.93 0 112.597 0H131.836C137.503 0 142.097 4.59395 142.097 10.2609V29.5C142.097 35.1669 137.503 39.7609 131.836 39.7609H112.597C106.93 39.7609 102.336 35.1669 102.336 29.5V10.2609Z"
+		fill="#15212D" />
+	<path
+		d="M34.8184 148.09C34.8184 143.427 38.5986 139.646 43.2618 139.646H59.0933C63.7565 139.646 67.5368 143.427 67.5368 148.09V163.921C67.5368 168.585 63.7565 172.365 59.0933 172.365H43.2618C38.5986 172.365 34.8184 168.585 34.8184 163.921V148.09Z"
+		fill="#15212D" />
+	<path
+		d="M110.024 186.044C110.024 183.557 112.04 181.541 114.527 181.541H122.971C125.458 181.541 127.475 183.557 127.475 186.044V194.488C127.475 196.976 125.458 198.992 122.971 198.992H114.527C112.04 198.992 110.024 196.976 110.024 194.488V186.044Z"
+		fill="#15212D" />
+	<path
+		d="M173.713 141.6C173.713 134.89 179.152 129.451 185.862 129.451H208.641C215.351 129.451 220.79 134.89 220.79 141.6V164.38C220.79 171.089 215.351 176.528 208.641 176.528H185.862C179.152 176.528 173.713 171.089 173.713 164.38V141.6Z"
+		fill="#15212D" />
+	<path
+		d="M232.049 95.4156C232.049 92.9284 234.065 90.9121 236.553 90.9121H244.997C247.484 90.9121 249.5 92.9284 249.5 95.4156V103.86C249.5 106.347 247.484 108.363 244.997 108.363H236.553C234.065 108.363 232.049 106.347 232.049 103.86V95.4156Z"
+		fill="#15212D" />
+	<path fill-rule="evenodd" clip-rule="evenodd"
+		d="M120.481 84.2273V45.2676H122.481V84.2273H120.481Z" fill="#657D99" />
+	<path fill-rule="evenodd" clip-rule="evenodd"
+		d="M117.685 176.101L117.685 139.646H119.685L119.685 176.101H117.685Z" fill="#657D99" />
+	<path fill-rule="evenodd" clip-rule="evenodd"
+		d="M3.27959 108.445L4.0457 106.598C4.3381 106.719 4.66032 106.787 5.00345 106.787H7.11444V108.787H5.00345C4.39282 108.787 3.81058 108.665 3.27959 108.445ZM11.3364 108.787V106.787H13.4474C13.7905 106.787 14.1128 106.719 14.4052 106.598L15.1713 108.445C14.6403 108.665 14.058 108.787 13.4474 108.787H11.3364ZM17.9509 97.9504H15.9509V95.8394C15.9509 95.4963 15.8829 95.174 15.7617 94.8816L17.6091 94.1155C17.8293 94.6465 17.9509 95.2288 17.9509 95.8394V97.9504ZM7.11444 91.3359H5.00345C4.39282 91.3359 3.81058 91.4575 3.27959 91.6777L4.0457 93.5251C4.3381 93.4039 4.66032 93.3359 5.00345 93.3359H7.11444V91.3359ZM0.500008 102.172H2.50001V104.283C2.50001 104.626 2.56793 104.949 2.68918 105.241L0.841732 106.007C0.621538 105.476 0.500008 104.894 0.500008 104.283V102.172ZM0.500008 97.9504H2.50001V95.8394C2.50001 95.4963 2.56793 95.174 2.68918 94.8816L0.841731 94.1155C0.621538 94.6465 0.500008 95.2288 0.500008 95.8394V97.9504ZM11.3364 91.3359V93.3359H13.4474C13.7905 93.3359 14.1128 93.4039 14.4052 93.5251L15.1713 91.6777C14.6403 91.4575 14.058 91.3359 13.4474 91.3359H11.3364ZM17.9509 102.172H15.9509V104.283C15.9509 104.626 15.8829 104.949 15.7617 105.241L17.6091 106.007C17.8293 105.476 17.9509 104.894 17.9509 104.283V102.172Z"
+		fill="#657D99" />
+	<path fill-rule="evenodd" clip-rule="evenodd"
+		d="M41.1771 64.5169V62.6484H43.1771V64.5169H41.1771ZM41.1771 71.9908V68.2538H43.1771V71.9908H41.1771ZM41.1771 79.4647V75.7277H43.1771V79.4647H41.1771ZM41.1771 86.9385V83.2016H43.1771V86.9385H41.1771ZM41.1771 94.4124V90.6755H43.1771V94.4124H41.1771ZM41.1771 99.0178V98.1493H43.1771V99.0178H44.9095V101.018H39.681V99.0178H41.1771ZM24.7048 101.018H22.2087V99.0178H24.7048V101.018ZM34.6889 101.018H29.6969V99.0178H34.6889V101.018ZM52.1068 101.018H50.3744V99.0178H54.8543V101.018H54.1068V102.148H52.1068V101.018ZM61.8442 101.018H58.3493V99.0178H61.8442V101.018ZM67.0867 101.018H65.3392V99.0178H67.0867C68.0476 99.0178 68.9663 99.2092 69.8048 99.557L69.0387 101.404C68.4388 101.156 67.7801 101.018 67.0867 101.018ZM72.187 106.118C72.187 105.425 72.0492 104.766 71.8004 104.166L73.6478 103.4C73.9955 104.239 74.187 105.157 74.187 106.118C74.187 106.812 74.3248 107.47 74.5736 108.07L72.7261 108.836C72.3784 107.998 72.187 107.079 72.187 106.118ZM52.1068 110.668V106.408H54.1068V110.668H52.1068ZM79.2873 113.218C78.3264 113.218 77.4077 113.027 76.5691 112.679L77.3352 110.832C77.9352 111.081 78.5939 111.218 79.2873 111.218H81.5905V113.218H79.2873ZM88.5 113.218H86.1968V111.218H88.5V113.218ZM52.1068 119.188V114.928H54.1068V119.188H52.1068ZM52.1068 127.709V123.449H54.1068V127.709H52.1068ZM52.1068 134.099V131.969H54.1068V134.099H52.1068Z"
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+		d="M178.996 80.3275L179.762 78.4801C180.48 78.7778 181.269 78.9431 182.101 78.9431H184.003V80.9431H182.101C181.001 80.9431 179.952 80.7242 178.996 80.3275ZM195.412 80.9431V78.9431H197.314C198.146 78.9431 198.935 78.7778 199.653 78.4801L200.419 80.3275C199.463 80.7242 198.414 80.9431 197.314 80.9431H195.412ZM205.427 59.5189H203.427V57.6174C203.427 56.7848 203.262 55.9958 202.964 55.2778L204.811 54.5117C205.208 55.4683 205.427 56.5173 205.427 57.6174V59.5189ZM184.003 49.5041H182.101C181.001 49.5041 179.952 49.723 178.996 50.1197L179.762 51.9672C180.48 51.6694 181.269 51.5041 182.101 51.5041H184.003V49.5041ZM173.988 70.9283H175.988V72.8298C175.988 73.6624 176.153 74.4514 176.451 75.1694L174.604 75.9355C174.207 74.9789 173.988 73.9299 173.988 72.8298V70.9283ZM173.988 67.1252H175.988V63.322H173.988V67.1252ZM173.988 59.5189H175.988V57.6174C175.988 56.7848 176.153 55.9958 176.451 55.2778L174.604 54.5117C174.207 55.4683 173.988 56.5173 173.988 57.6174V59.5189ZM187.806 49.5041V51.5041H191.609V49.5041H187.806ZM195.412 49.5041V51.5041H197.314C198.146 51.5041 198.935 51.6694 199.653 51.9672L200.419 50.1197C199.463 49.723 198.414 49.5041 197.314 49.5041H195.412ZM205.427 63.322H203.427V67.1252H205.427V63.322ZM205.427 70.9283H203.427V72.8298C203.427 73.6624 203.262 74.4514 202.964 75.1694L204.811 75.9355C205.208 74.9789 205.427 73.9299 205.427 72.8298V70.9283ZM191.609 80.9431V78.9431H187.806V80.9431H191.609Z"
+		fill="#657D99" />
+	<path fill-rule="evenodd" clip-rule="evenodd"
+		d="M234.829 108.525L235.595 106.678C235.887 106.799 236.209 106.867 236.553 106.867H238.664V108.867H236.553C235.942 108.867 235.36 108.745 234.829 108.525ZM242.886 108.867V106.867H244.997C245.34 106.867 245.662 106.799 245.954 106.678L246.72 108.525C246.189 108.745 245.607 108.867 244.997 108.867H242.886ZM249.5 98.0306H247.5V95.9196C247.5 95.5765 247.432 95.2543 247.311 94.9619L249.158 94.1957C249.378 94.7267 249.5 95.309 249.5 95.9196V98.0306ZM238.664 91.4162H236.553C235.942 91.4162 235.36 91.5377 234.829 91.7579L235.595 93.6053C235.887 93.4841 236.209 93.4162 236.553 93.4162H238.664V91.4162ZM232.049 102.253H234.049V104.364C234.049 104.707 234.117 105.029 234.238 105.321L232.391 106.087C232.171 105.556 232.049 104.974 232.049 104.364V102.253ZM232.049 98.0306H234.049V95.9196C234.049 95.5765 234.117 95.2543 234.238 94.9619L232.391 94.1957C232.171 94.7267 232.049 95.309 232.049 95.9196V98.0306ZM242.886 91.4162V93.4162H244.997C245.34 93.4162 245.662 93.4841 245.954 93.6053L246.72 91.7579C246.189 91.5377 245.607 91.4162 244.997 91.4162H242.886ZM249.5 102.253H247.5V104.364C247.5 104.707 247.432 105.029 247.311 105.321L249.158 106.087C249.378 105.556 249.5 104.974 249.5 104.364V102.253Z"
+		fill="#435B77" />
+	<path
+		d="M29.8254 34.881V54.1644C29.8254 55.7297 31.1003 57.0206 32.6817 57.0206H34.021C35.5863 57.0206 36.8772 55.7297 36.8772 54.1644V34.881H29.8254Z"
+		fill="#82C91E" />
+	<path
+		d="M36.8611 25.5867V21.956C36.8611 20.3907 35.5863 19.0998 34.021 19.0998H32.6817C31.1164 19.0998 29.8254 20.3907 29.8254 21.956V25.5867H36.8611Z"
+		fill="#82C91E" />
+	<path
+		d="M52.5136 41.2394V21.956C52.5136 20.3907 51.2388 19.0998 49.6735 19.0998H48.3342C46.7689 19.0998 45.478 20.3907 45.478 21.956V41.2394H52.5136Z"
+		fill="#82C91E" />
+	<path
+		d="M45.478 50.5334V54.1641C45.478 55.7294 46.7689 57.0203 48.3342 57.0203H49.6735C51.2388 57.0203 52.5298 55.7294 52.5298 54.1641V50.5334H45.478Z"
+		fill="#82C91E" />
+	<path
+		d="M28.6957 42.3693H25.065C23.4997 42.3693 22.2087 43.6441 22.2087 45.2255V46.5648C22.2087 48.1301 23.4836 49.4211 25.065 49.4211H28.6957V42.3693Z"
+		fill="#95DE2D" />
+	<path
+		d="M57.2738 42.3693H37.9903V49.4211H57.2738C58.839 49.4211 60.13 48.1301 60.13 46.5648V45.2255C60.13 43.6441 58.839 42.3693 57.2738 42.3693Z"
+		fill="#95DE2D" />
+	<path
+		d="M44.3484 26.7169H25.065C23.4997 26.7169 22.2087 27.9918 22.2087 29.5732V30.9125C22.2087 32.4778 23.4836 33.7687 25.065 33.7687H44.3484V26.7169Z"
+		fill="#95DE2D" />
+	<path
+		d="M57.2738 26.7169H53.6431V33.7687H57.2738C58.8391 33.7687 60.1301 32.4938 60.1301 30.9124V29.5731C60.1301 27.9917 58.8391 26.7169 57.2738 26.7169Z"
+		fill="#95DE2D" />
+	<path fill-rule="evenodd" clip-rule="evenodd"
+		d="M108.864 100H129.086C129.852 100 130.587 100.305 131.129 100.848C131.671 101.39 131.975 102.126 131.975 102.894L131.975 127.695C131.975 128.8 130.688 129.403 129.841 128.695L124.6 124.308H108.864C108.098 124.308 107.363 124.003 106.821 123.46C106.279 122.917 105.975 122.181 105.975 121.414V102.894C105.975 102.126 106.279 101.39 106.821 100.848C107.363 100.305 108.098 100 108.864 100ZM116.549 112.823H110.597V104.63H127.353V112.823H121.499V115.656H123.64C124.026 115.656 124.22 116.123 123.947 116.397L119.331 121.021C119.161 121.19 118.887 121.19 118.718 121.021L114.102 116.397C113.829 116.123 114.022 115.656 114.408 115.656H116.549V112.823Z"
+		fill="#95DE2D" />
+	<path
+		d="M190.408 151.656V162.803C190.408 163.708 191.145 164.454 192.059 164.454H192.833C193.738 164.454 194.484 163.708 194.484 162.803V151.656H190.408Z"
+		fill="#82C91E" />
+	<path
+		d="M194.475 146.283V144.184C194.475 143.279 193.738 142.533 192.833 142.533H192.059C191.154 142.533 190.408 143.279 190.408 144.184V146.283H194.475Z"
+		fill="#82C91E" />
+	<path
+		d="M203.523 155.331V144.184C203.523 143.279 202.786 142.533 201.881 142.533H201.107C200.202 142.533 199.456 143.279 199.456 144.184V155.331H203.523Z"
+		fill="#82C91E" />
+	<path
+		d="M199.456 160.705V162.804C199.456 163.709 200.202 164.455 201.107 164.455H201.881C202.786 164.455 203.533 163.709 203.533 162.804V160.705H199.456Z"
+		fill="#82C91E" />
+	<path
+		d="M189.755 155.984H187.656C186.751 155.984 186.005 156.721 186.005 157.635V158.409C186.005 159.314 186.742 160.061 187.656 160.061H189.755V155.984Z"
+		fill="#95DE2D" />
+	<path
+		d="M206.275 155.984H195.128V160.061H206.275C207.18 160.061 207.926 159.314 207.926 158.409V157.635C207.926 156.721 207.18 155.984 206.275 155.984Z"
+		fill="#95DE2D" />
+	<path
+		d="M198.803 146.937H187.656C186.751 146.937 186.005 147.674 186.005 148.588V149.363C186.005 150.267 186.742 151.014 187.656 151.014H198.803V146.937Z"
+		fill="#95DE2D" />
+	<path
+		d="M206.275 146.937H204.176V151.014H206.275C207.18 151.014 207.926 150.277 207.926 149.363V148.588C207.926 147.674 207.18 146.937 206.275 146.937Z"
+		fill="#95DE2D" />
+</svg>

briar-android/build.gradle

@@ -26,8 +26,8 @@ android {
 	defaultConfig {
 		minSdkVersion 16
 		targetSdkVersion 30
-		versionCode 10403
-		versionName "1.4.3"
+		versionCode 10405
+		versionName "1.4.5"
 		applicationId "org.briarproject.briar.android"
 
 		vectorDrawables.useSupportLibrary = true
@@ -131,17 +131,17 @@ dependencies {
 	def espressoVersion = '3.3.0'
 	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
 	testImplementation project(path: ':bramble-core', configuration: 'testOutput')
-	testImplementation 'androidx.test:runner:1.3.0'
-	testImplementation 'androidx.test.ext:junit:1.1.2'
-	testImplementation 'androidx.fragment:fragment-testing:1.3.4'
+	testImplementation 'androidx.test:runner:1.4.0'
+	testImplementation 'androidx.test.ext:junit:1.1.3'
+	testImplementation 'androidx.fragment:fragment-testing:1.4.0'
 	testImplementation "androidx.arch.core:core-testing:2.1.0"
 	testImplementation "androidx.test.espresso:espresso-core:$espressoVersion"
-	testImplementation 'org.robolectric:robolectric:4.3.1'
+	testImplementation 'org.robolectric:robolectric:4.4'
 	testImplementation 'org.mockito:mockito-core:3.9.0'
 	testImplementation "junit:junit:$junit_version"
 	testImplementation "org.jmock:jmock:$jmock_version"
 	testImplementation "org.jmock:jmock-junit4:$jmock_version"
-	testImplementation "org.jmock:jmock-legacy:$jmock_version"
+	testImplementation "org.jmock:jmock-imposters:$jmock_version"
 	testAnnotationProcessor "com.google.dagger:dagger-compiler:$dagger_version"
 
 	androidTestImplementation project(path: ':bramble-api', configuration: 'testOutput')

briar-android/proguard-rules.txt

@@ -3,6 +3,8 @@
 -dontobfuscate
 -keepattributes SourceFile, LineNumberTable, *Annotation*, Signature, InnerClasses, EnclosingMethod
 
+-keep,includedescriptorclasses class org.briarproject.briar.android.**,org.briarproject.briar.api.android.** { *; }
+
 # QR codes
 -keep class com.google.zxing.Result
 -keepclassmembers enum * {

briar-android/src/main/AndroidManifest.xml

@@ -99,6 +99,10 @@
 			android:name="org.briarproject.briar.android.splash.ExpiredActivity"
 			android:label="@string/app_name" />
 
+		<activity
+			android:name="org.briarproject.briar.android.splash.ExpiredOldAndroidActivity"
+			android:label="@string/app_name" />
+
 		<activity
 			android:name="org.briarproject.briar.android.login.StartupActivity"
 			android:label="@string/app_name" />
@@ -473,6 +477,17 @@
 				android:value="org.briarproject.briar.android.conversation.ConversationActivity" />
 		</activity>
 
+		<activity
+			android:name=".android.mailbox.MailboxActivity"
+			android:exported="false"
+			android:label="@string/mailbox_settings_title"
+			android:parentActivityName="org.briarproject.briar.android.settings.SettingsActivity"
+			android:theme="@style/BriarTheme">
+			<meta-data
+				android:name="android.support.PARENT_ACTIVITY"
+				android:value="org.briarproject.briar.android.settings.SettingsActivity" />
+		</activity>
+
 	</application>
 
 	<queries>

briar-android/src/main/java/org/briarproject/briar/android/AndroidComponent.java

@@ -44,6 +44,9 @@ import org.briarproject.briar.android.hotspot.ManualHotspotFragment;
 import org.briarproject.briar.android.hotspot.QrHotspotFragment;
 import org.briarproject.briar.android.logging.CachingLogHandler;
 import org.briarproject.briar.android.login.SignInReminderReceiver;
+import org.briarproject.briar.android.mailbox.MailboxScanFragment;
+import org.briarproject.briar.android.mailbox.OfflineFragment;
+import org.briarproject.briar.android.mailbox.SetupDownloadFragment;
 import org.briarproject.briar.android.removabledrive.ChooserFragment;
 import org.briarproject.briar.android.removabledrive.ReceiveFragment;
 import org.briarproject.briar.android.removabledrive.SendFragment;
@@ -239,4 +242,10 @@ public interface AndroidComponent
 	void inject(ReceiveFragment receiveFragment);
 
 	void inject(BluetoothIntroFragment bluetoothIntroFragment);
+
+	void inject(SetupDownloadFragment setupDownloadFragment);
+
+	void inject(MailboxScanFragment mailboxScanFragment);
+
+	void inject(OfflineFragment offlineFragment);
 }

briar-android/src/main/java/org/briarproject/briar/android/AppModule.java

@@ -31,6 +31,7 @@ import org.briarproject.bramble.plugin.tcp.AndroidLanTcpPluginFactory;
 import org.briarproject.bramble.plugin.tor.AndroidTorPluginFactory;
 import org.briarproject.bramble.util.AndroidUtils;
 import org.briarproject.bramble.util.StringUtils;
+import org.briarproject.briar.BuildConfig;
 import org.briarproject.briar.android.account.DozeHelperModule;
 import org.briarproject.briar.android.account.LockManagerImpl;
 import org.briarproject.briar.android.account.SetupModule;
@@ -339,6 +340,26 @@ public class AppModule {
 			public boolean shouldEnableDisappearingMessages() {
 				return true;
 			}
+
+			@Override
+			public boolean shouldEnableMailbox() {
+				return BuildConfig.DEBUG;
+			}
+
+			@Override
+			public boolean shouldEnablePrivateGroupsInCore() {
+				return true;
+			}
+
+			@Override
+			public boolean shouldEnableForumsInCore() {
+				return true;
+			}
+
+			@Override
+			public boolean shouldEnableBlogsInCore() {
+				return true;
+			}
 		};
 	}
 }

briar-android/src/main/java/org/briarproject/briar/android/TestingConstants.java

@@ -2,6 +2,7 @@ package org.briarproject.briar.android;
 
 import org.briarproject.briar.BuildConfig;
 
+import static android.os.Build.VERSION.SDK_INT;
 import static java.util.concurrent.TimeUnit.DAYS;
 
 public interface TestingConstants {
@@ -19,10 +20,15 @@ public interface TestingConstants {
 	 */
 	boolean PREVENT_SCREENSHOTS = !IS_DEBUG_BUILD;
 
+	boolean IS_OLD_ANDROID = SDK_INT <= 19;
+	long OLD_ANDROID_WARN_DATE = 1659225600_000L;   // 2022-07-31
+	long OLD_ANDROID_EXPIRY_DATE = 1675123200_000L; // 2023-01-31
+
 	/**
-	 * Debug builds expire after 90 days. Release builds expire after 292
-	 * million years.
+	 * Debug builds expire after 90 days. Release builds running on Android 4
+	 * expire at a set date, otherwise they expire after 292 million years.
 	 */
 	long EXPIRY_DATE = IS_DEBUG_BUILD ?
-			BuildConfig.BuildTimestamp + DAYS.toMillis(90) : Long.MAX_VALUE;
+			BuildConfig.BuildTimestamp + DAYS.toMillis(90)
+			: (IS_OLD_ANDROID ? OLD_ANDROID_EXPIRY_DATE : Long.MAX_VALUE);
 }

briar-android/src/main/java/org/briarproject/briar/android/activity/ActivityComponent.java

@@ -46,6 +46,7 @@ import org.briarproject.briar.android.login.ChangePasswordActivity;
 import org.briarproject.briar.android.login.OpenDatabaseFragment;
 import org.briarproject.briar.android.login.PasswordFragment;
 import org.briarproject.briar.android.login.StartupActivity;
+import org.briarproject.briar.android.mailbox.MailboxActivity;
 import org.briarproject.briar.android.navdrawer.NavDrawerActivity;
 import org.briarproject.briar.android.navdrawer.TransportsActivity;
 import org.briarproject.briar.android.panic.PanicPreferencesActivity;
@@ -80,6 +81,7 @@ import org.briarproject.briar.android.sharing.ShareBlogFragment;
 import org.briarproject.briar.android.sharing.ShareForumActivity;
 import org.briarproject.briar.android.sharing.ShareForumFragment;
 import org.briarproject.briar.android.sharing.SharingModule;
+import org.briarproject.briar.android.splash.ExpiredOldAndroidActivity;
 import org.briarproject.briar.android.splash.SplashScreenActivity;
 import org.briarproject.briar.android.test.TestDataActivity;
 
@@ -182,6 +184,8 @@ public interface ActivityComponent {
 
 	void inject(RemovableDriveActivity activity);
 
+	void inject(ExpiredOldAndroidActivity activity);
+
 	// Fragments
 
 	void inject(SetupFragment fragment);
@@ -247,4 +251,6 @@ public interface ActivityComponent {
 	void inject(RssFeedDeleteFeedDialogFragment fragment);
 
 	void inject(ConnectViaBluetoothActivity connectViaBluetoothActivity);
+
+	void inject(MailboxActivity mailboxActivity);
 }

briar-android/src/main/java/org/briarproject/briar/android/activity/BaseActivity.java

@@ -181,12 +181,6 @@ public abstract class BaseActivity extends AppCompatActivity
 		showFragment(getSupportFragmentManager(), f, f.getUniqueTag());
 	}
 
-	protected boolean isFragmentAdded(String fragmentTag) {
-		FragmentManager fm = getSupportFragmentManager();
-		Fragment f = fm.findFragmentByTag(fragmentTag);
-		return f != null && f.isAdded();
-	}
-
 	private boolean showScreenFilterWarning() {
 		if (((BriarApplication) getApplication()).isInstrumentationTest()) {
 			return false;

briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/AddNearbyContactPermissionManager.java

@@ -3,11 +3,10 @@ package org.briarproject.briar.android.contact.add.nearby;
 import android.content.Context;
 
 import org.briarproject.briar.R;
+import org.briarproject.briar.android.util.Permission;
 
 import java.util.Map;
 
-import androidx.annotation.StringRes;
-import androidx.appcompat.app.AlertDialog;
 import androidx.core.util.Consumer;
 import androidx.fragment.app.FragmentActivity;
 
@@ -17,16 +16,13 @@ import static android.content.pm.PackageManager.PERMISSION_GRANTED;
 import static android.os.Build.VERSION.SDK_INT;
 import static androidx.core.app.ActivityCompat.shouldShowRequestPermissionRationale;
 import static androidx.core.content.ContextCompat.checkSelfPermission;
-import static org.briarproject.briar.android.util.UiUtils.getGoToSettingsListener;
 import static org.briarproject.briar.android.util.UiUtils.isLocationEnabled;
+import static org.briarproject.briar.android.util.UiUtils.showDenialDialog;
 import static org.briarproject.briar.android.util.UiUtils.showLocationDialog;
+import static org.briarproject.briar.android.util.UiUtils.showRationale;
 
 class AddNearbyContactPermissionManager {
 
-	private enum Permission {
-		UNKNOWN, GRANTED, SHOW_RATIONALE, PERMANENTLY_DENIED
-	}
-
 	private Permission cameraPermission = Permission.UNKNOWN;
 	private Permission locationPermission = Permission.UNKNOWN;
 
@@ -68,27 +64,30 @@ class AddNearbyContactPermissionManager {
 		// If an essential permission has been permanently denied, ask the
 		// user to change the setting
 		if (cameraPermission == Permission.PERMANENTLY_DENIED) {
-			showDenialDialog(R.string.permission_camera_title,
+			showDenialDialog(ctx, R.string.permission_camera_title,
 					R.string.permission_camera_denied_body);
 			return false;
 		}
 		if (isBluetoothSupported &&
 				locationPermission == Permission.PERMANENTLY_DENIED) {
-			showDenialDialog(R.string.permission_location_title,
+			showDenialDialog(ctx, R.string.permission_location_title,
 					R.string.permission_location_denied_body);
 			return false;
 		}
 		// Should we show the rationale for one or both permissions?
 		if (cameraPermission == Permission.SHOW_RATIONALE &&
 				locationPermission == Permission.SHOW_RATIONALE) {
-			showRationale(R.string.permission_camera_location_title,
-					R.string.permission_camera_location_request_body);
+			showRationale(ctx, R.string.permission_camera_location_title,
+					R.string.permission_camera_location_request_body,
+					this::requestPermissions);
 		} else if (cameraPermission == Permission.SHOW_RATIONALE) {
-			showRationale(R.string.permission_camera_title,
-					R.string.permission_camera_request_body);
+			showRationale(ctx, R.string.permission_camera_title,
+					R.string.permission_camera_request_body,
+					this::requestPermissions);
 		} else if (locationPermission == Permission.SHOW_RATIONALE) {
-			showRationale(R.string.permission_location_title,
-					R.string.permission_location_request_body);
+			showRationale(ctx, R.string.permission_location_title,
+					R.string.permission_location_request_body,
+					this::requestPermissions);
 		} else if (locationEnabled) {
 			requestPermissions();
 		} else {
@@ -97,27 +96,6 @@ class AddNearbyContactPermissionManager {
 		return false;
 	}
 
-	private void showDenialDialog(@StringRes int title, @StringRes int body) {
-		AlertDialog.Builder builder =
-				new AlertDialog.Builder(ctx, R.style.BriarDialogTheme);
-		builder.setTitle(title);
-		builder.setMessage(body);
-		builder.setPositiveButton(R.string.ok, getGoToSettingsListener(ctx));
-		builder.setNegativeButton(R.string.cancel,
-				(dialog, which) -> ctx.supportFinishAfterTransition());
-		builder.show();
-	}
-
-	private void showRationale(@StringRes int title, @StringRes int body) {
-		AlertDialog.Builder builder =
-				new AlertDialog.Builder(ctx, R.style.BriarDialogTheme);
-		builder.setTitle(title);
-		builder.setMessage(body);
-		builder.setNeutralButton(R.string.continue_button,
-				(dialog, which) -> requestPermissions());
-		builder.show();
-	}
-
 	private void requestPermissions() {
 		String[] permissions;
 		if (isBluetoothSupported) {

briar-android/src/main/java/org/briarproject/briar/android/contact/connect/BluetoothConditionManager.java

@@ -4,6 +4,7 @@ import android.app.Activity;
 import android.content.Context;
 
 import org.briarproject.briar.R;
+import org.briarproject.briar.android.util.Permission;
 
 import androidx.activity.result.ActivityResultLauncher;
 import androidx.annotation.Nullable;
@@ -19,10 +20,6 @@ import static org.briarproject.briar.android.util.UiUtils.showLocationDialog;
 
 class BluetoothConditionManager {
 
-	private enum Permission {
-		UNKNOWN, GRANTED, SHOW_RATIONALE, PERMANENTLY_DENIED
-	}
-
 	private Permission locationPermission = Permission.UNKNOWN;
 
 	/**

briar-android/src/main/java/org/briarproject/briar/android/fragment/FinalFragment.java

@@ -1,5 +1,6 @@
 package org.briarproject.briar.android.fragment;
 
+import android.content.Context;
 import android.content.res.ColorStateList;
 import android.os.Bundle;
 import android.view.LayoutInflater;
@@ -16,6 +17,7 @@ import org.briarproject.briar.R;
 import androidx.activity.OnBackPressedCallback;
 import androidx.annotation.ColorRes;
 import androidx.annotation.DrawableRes;
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.StringRes;
 import androidx.appcompat.app.ActionBar;
@@ -93,11 +95,6 @@ public class FinalFragment extends Fragment {
 
 		AppCompatActivity a = (AppCompatActivity) requireActivity();
 		a.setTitle(args.getInt(ARG_TITLE));
-		ActionBar actionBar = a.getSupportActionBar();
-		if (actionBar != null) {
-			actionBar.setDisplayHomeAsUpEnabled(false);
-			actionBar.setHomeButtonEnabled(false);
-		}
 		a.getOnBackPressedDispatcher().addCallback(
 				getViewLifecycleOwner(), new OnBackPressedCallback(true) {
 					@Override
@@ -108,6 +105,18 @@ public class FinalFragment extends Fragment {
 		return v;
 	}
 
+	@Override
+	public void onAttach(@NonNull Context context) {
+		super.onAttach(context);
+		// onAttach(Activity) is deprecated, we are told to cast the context
+		AppCompatActivity a = (AppCompatActivity) context;
+		ActionBar actionBar = a.getSupportActionBar();
+		if (shouldHideActionBarBackButton() && actionBar != null) {
+			actionBar.setDisplayHomeAsUpEnabled(false);
+			actionBar.setHomeButtonEnabled(false);
+		}
+	}
+
 	@Override
 	public void onStart() {
 		super.onStart();
@@ -115,6 +124,17 @@ public class FinalFragment extends Fragment {
 		scrollView.post(() -> scrollView.fullScroll(FOCUS_DOWN));
 	}
 
+	@Override
+	public void onDetach() {
+		AppCompatActivity a = (AppCompatActivity) requireActivity();
+		ActionBar actionBar = a.getSupportActionBar();
+		if (shouldHideActionBarBackButton() && actionBar != null) {
+			actionBar.setDisplayHomeAsUpEnabled(true);
+			actionBar.setHomeButtonEnabled(true);
+		}
+		super.onDetach();
+	}
+
 	/**
 	 * This is the action that the system back button
 	 * and the button at the bottom will perform.
@@ -123,4 +143,13 @@ public class FinalFragment extends Fragment {
 		requireActivity().supportFinishAfterTransition();
 	}
 
+	/**
+	 * If you are overriding {@link #onBackButtonPressed()}
+	 * and are no longer finishing the fragment, return false here.
+	 * Otherwise the ActionBar back button will be missing in your activity.
+	 */
+	protected boolean shouldHideActionBarBackButton() {
+		return true;
+	}
+
 }

briar-android/src/main/java/org/briarproject/briar/android/hotspot/AbstractConditionManager.java

@@ -20,11 +20,7 @@ import static android.content.Context.WIFI_SERVICE;
  */
 abstract class AbstractConditionManager {
 
-	enum Permission {
-		UNKNOWN, GRANTED, SHOW_RATIONALE, PERMANENTLY_DENIED
-	}
-
-	protected final Consumer<Boolean> permissionUpdateCallback;
+	final Consumer<Boolean> permissionUpdateCallback;
 	protected FragmentActivity ctx;
 	WifiManager wifiManager;
 

briar-android/src/main/java/org/briarproject/briar/android/hotspot/ConditionManager29.java

@@ -4,6 +4,7 @@ import android.content.Intent;
 import android.provider.Settings;
 
 import org.briarproject.briar.R;
+import org.briarproject.briar.android.util.Permission;
 
 import java.util.logging.Logger;
 

briar-android/src/main/java/org/briarproject/briar/android/hotspot/HotspotActivity.java

@@ -56,13 +56,9 @@ public class HotspotActivity extends BriarActivity
 			if (hotspotState instanceof HotspotStarted) {
 				HotspotStarted started = (HotspotStarted) hotspotState;
 				String tag = HotspotFragment.TAG;
-				// check if fragment is already added
-				// to not lose state on configuration changes
-				if (fm.findFragmentByTag(tag) == null) {
-					if (started.wasNotYetConsumed()) {
-						started.consume();
-						showFragment(fm, new HotspotFragment(), tag);
-					}
+				if (started.wasNotYetConsumed()) {
+					started.consume();
+					showFragment(fm, new HotspotFragment(), tag);
 				}
 			} else if (hotspotState instanceof HotspotError) {
 				HotspotError error = (HotspotError) hotspotState;
@@ -116,10 +112,8 @@ public class HotspotActivity extends BriarActivity
 	private void showErrorFragment(String error) {
 		FragmentManager fm = getSupportFragmentManager();
 		String tag = HotspotErrorFragment.TAG;
-		if (fm.findFragmentByTag(tag) == null) {
-			Fragment f = HotspotErrorFragment.newInstance(error);
-			showFragment(fm, f, tag, false);
-		}
+		Fragment f = HotspotErrorFragment.newInstance(error);
+		showFragment(fm, f, tag, false);
 	}
 
 	@Override

briar-android/src/main/java/org/briarproject/briar/android/login/StartupActivity.java

@@ -85,16 +85,10 @@ public class StartupActivity extends BaseActivity implements
 		if (state == SIGNED_OUT) {
 			// Configuration changes such as screen rotation
 			// can cause this to get called again.
-			// Don't replace the fragment in that case to not lose view state.
-			if (!isFragmentAdded(PasswordFragment.TAG)) {
-				showInitialFragment(new PasswordFragment());
-			}
+			showInitialFragment(new PasswordFragment());
 		} else if (state == SIGNED_IN || state == STARTING) {
 			startService(new Intent(this, BriarService.class));
-			// Only show OpenDatabaseFragment if not already visible.
-			if (!isFragmentAdded(OpenDatabaseFragment.TAG)) {
-				showNextFragment(new OpenDatabaseFragment());
-			}
+			showNextFragment(new OpenDatabaseFragment());
 		} else if (state == STARTED) {
 			setResult(RESULT_OK);
 			supportFinishAfterTransition();

briar-android/src/main/java/org/briarproject/briar/android/mailbox/CameraPermissionManager.java

@@ -0,0 +1,83 @@
+package org.briarproject.briar.android.mailbox;
+
+import android.content.Context;
+
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.util.Permission;
+
+import java.util.Map;
+
+import androidx.core.util.Consumer;
+import androidx.fragment.app.FragmentActivity;
+
+import static android.Manifest.permission.CAMERA;
+import static android.content.pm.PackageManager.PERMISSION_GRANTED;
+import static androidx.core.app.ActivityCompat.shouldShowRequestPermissionRationale;
+import static androidx.core.content.ContextCompat.checkSelfPermission;
+import static org.briarproject.briar.android.util.UiUtils.showDenialDialog;
+import static org.briarproject.briar.android.util.UiUtils.showRationale;
+
+class CameraPermissionManager {
+
+	private Permission cameraPermission = Permission.UNKNOWN;
+
+	private final FragmentActivity ctx;
+	private final Consumer<String[]> requestPermissions;
+
+	CameraPermissionManager(FragmentActivity ctx,
+			Consumer<String[]> requestPermissions) {
+		this.ctx = ctx;
+		this.requestPermissions = requestPermissions;
+	}
+
+	void resetPermissions() {
+		cameraPermission = Permission.UNKNOWN;
+	}
+
+	private static boolean areEssentialPermissionsGranted(Context ctx) {
+		return checkSelfPermission(ctx, CAMERA) == PERMISSION_GRANTED;
+	}
+
+	private boolean areEssentialPermissionsGranted() {
+		return cameraPermission == Permission.GRANTED;
+	}
+
+	boolean checkPermissions() {
+		if (areEssentialPermissionsGranted()) return true;
+		// If an essential permission has been permanently denied, ask the
+		// user to change the setting
+		if (cameraPermission == Permission.PERMANENTLY_DENIED) {
+			showDenialDialog(ctx, R.string.permission_camera_title,
+					R.string.permission_camera_qr_denied_body);
+		} else if (cameraPermission == Permission.SHOW_RATIONALE) {
+			showRationale(ctx, R.string.permission_camera_title,
+					R.string.permission_camera_request_body,
+					this::requestPermissions);
+		} else {
+			requestPermissions();
+		}
+		return false;
+	}
+
+	private void requestPermissions() {
+		String[] permissions = new String[] {CAMERA};
+		requestPermissions.accept(permissions);
+	}
+
+	void onRequestPermissionResult(Map<String, Boolean> result) {
+		if (gotPermission(result)) {
+			cameraPermission = Permission.GRANTED;
+		} else if (shouldShowRequestPermissionRationale(ctx, CAMERA)) {
+			cameraPermission = Permission.SHOW_RATIONALE;
+		} else {
+			cameraPermission = Permission.PERMANENTLY_DENIED;
+		}
+	}
+
+	private boolean gotPermission(Map<String, Boolean> result) {
+		Boolean permissionResult = result.get(CAMERA);
+		return permissionResult == null ? areEssentialPermissionsGranted(ctx) :
+				permissionResult;
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/mailbox/ErrorFragment.java

@@ -0,0 +1,51 @@
+package org.briarproject.briar.android.mailbox;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.fragment.FinalFragment;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.StringRes;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class ErrorFragment extends FinalFragment {
+
+	public static ErrorFragment newInstance(@StringRes int title,
+			@StringRes int text) {
+		ErrorFragment f = new ErrorFragment();
+		Bundle args = new Bundle();
+		args.putInt(ARG_TITLE, title);
+		args.putInt(ARG_ICON, R.drawable.alerts_and_states_error);
+		args.putInt(ARG_ICON_TINT, R.color.briar_red_500);
+		args.putInt(ARG_TEXT, text);
+		f.setArguments(args);
+		return f;
+	}
+
+	@Nullable
+	@Override
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		View v = super.onCreateView(inflater, container, savedInstanceState);
+		buttonView.setText(R.string.try_again_button);
+		return v;
+	}
+
+	@Override
+	protected void onBackButtonPressed() {
+		requireActivity().getSupportFragmentManager().popBackStack();
+	}
+
+	@Override
+	protected boolean shouldHideActionBarBackButton() {
+		return false;
+	}
+}

briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxActivity.java

@@ -0,0 +1,128 @@
+package org.briarproject.briar.android.mailbox;
+
+import android.os.Bundle;
+import android.view.MenuItem;
+import android.widget.ProgressBar;
+import android.widget.Toast;
+
+import org.briarproject.bramble.api.mailbox.MailboxStatus;
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.activity.BriarActivity;
+
+import javax.inject.Inject;
+
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.ViewModelProvider;
+
+import static android.view.View.INVISIBLE;
+import static android.view.View.VISIBLE;
+import static org.briarproject.briar.android.util.UiUtils.showFragment;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class MailboxActivity extends BriarActivity {
+
+	@Inject
+	ViewModelProvider.Factory viewModelFactory;
+
+	private MailboxViewModel viewModel;
+	private ProgressBar progressBar;
+
+	@Override
+	public void injectActivity(ActivityComponent component) {
+		component.inject(this);
+
+		viewModel = new ViewModelProvider(this, viewModelFactory)
+				.get(MailboxViewModel.class);
+	}
+
+	@Override
+	public void onCreate(@Nullable Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_mailbox);
+
+		progressBar = findViewById(R.id.progressBar);
+		if (viewModel.getState().getValue() == null) {
+			progressBar.setVisibility(VISIBLE);
+		}
+
+		viewModel.getState().observeEvent(this, state -> {
+			if (state instanceof MailboxState.NotSetup) {
+				onNotSetup();
+			} else if (state instanceof MailboxState.ScanningQrCode) {
+				onScanningQrCode();
+			} else if (state instanceof MailboxState.SettingUp) {
+				onCodeScanned();
+			} else if (state instanceof MailboxState.QrCodeWrong) {
+				onQrCodeWrong();
+			} else if (state instanceof MailboxState.OfflineInSetup) {
+				onOffline();
+			} else if (state instanceof MailboxState.IsSetup) {
+				onIsSetup(((MailboxState.IsSetup) state).mailboxStatus);
+			} else {
+				throw new AssertionError("Unknown state: " + state);
+			}
+		});
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		if (item.getItemId() == android.R.id.home) {
+			onBackPressed();
+			return true;
+		}
+		return super.onOptionsItemSelected(item);
+	}
+
+	@Override
+	public void onBackPressed() {
+		if (viewModel.getState()
+				.getLastValue() instanceof MailboxState.SettingUp) {
+			// don't go back in flow if we are already setting up mailbox
+			supportFinishAfterTransition();
+		} else {
+			super.onBackPressed();
+		}
+	}
+
+	private void onNotSetup() {
+		progressBar.setVisibility(INVISIBLE);
+		getSupportFragmentManager().beginTransaction()
+				.replace(R.id.fragmentContainer, new SetupIntroFragment(),
+						SetupIntroFragment.TAG)
+				.commit();
+	}
+
+	private void onScanningQrCode() {
+		showFragment(getSupportFragmentManager(), new MailboxScanFragment(),
+				MailboxScanFragment.TAG);
+	}
+
+	private void onCodeScanned() {
+		showFragment(getSupportFragmentManager(),
+				new MailboxConnectingFragment(),
+				MailboxConnectingFragment.TAG, false);
+	}
+
+	private void onQrCodeWrong() {
+		Fragment f = ErrorFragment.newInstance(
+				R.string.mailbox_setup_qr_code_wrong_title,
+				R.string.mailbox_setup_qr_code_wrong_description);
+		showFragment(getSupportFragmentManager(), f, ErrorFragment.TAG);
+	}
+
+	private void onOffline() {
+		showFragment(getSupportFragmentManager(), new OfflineFragment(),
+				OfflineFragment.TAG);
+	}
+
+	private void onIsSetup(MailboxStatus mailboxStatus) {
+		// TODO
+		Toast.makeText(this, "NOT IMPLEMENTED", Toast.LENGTH_LONG).show();
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxConnectingFragment.java

@@ -0,0 +1,36 @@
+package org.briarproject.briar.android.mailbox;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class MailboxConnectingFragment extends Fragment {
+
+	static final String TAG = MailboxConnectingFragment.class.getName();
+
+	@Nullable
+	@Override
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		return inflater.inflate(R.layout.fragment_mailbox_connecting,
+				container, false);
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		requireActivity().setTitle(R.string.mailbox_setup_title);
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxModule.java

@@ -12,8 +12,7 @@ public interface MailboxModule {
 
 	@Binds
 	@IntoMap
-	@ViewModelKey(MailboxPairViewModel.class)
-	ViewModel bindMailboxViewModel(
-			MailboxPairViewModel mailboxPairViewModel);
+	@ViewModelKey(MailboxViewModel.class)
+	ViewModel bindMailboxViewModel(MailboxViewModel mailboxViewModel);
 
 }

briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxPairViewModel.java

@@ -1,95 +0,0 @@
-package org.briarproject.briar.android.mailbox;
-
-import android.app.Application;
-
-import com.google.zxing.Result;
-
-import org.briarproject.bramble.api.crypto.CryptoComponent;
-import org.briarproject.bramble.api.db.DatabaseExecutor;
-import org.briarproject.bramble.api.db.TransactionManager;
-import org.briarproject.bramble.api.lifecycle.IoExecutor;
-import org.briarproject.bramble.api.lifecycle.LifecycleManager;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.system.AndroidExecutor;
-import org.briarproject.bramble.util.StringUtils;
-import org.briarproject.briar.android.qrcode.QrCodeDecoder;
-import org.briarproject.briar.android.viewmodel.DbViewModel;
-
-import java.nio.charset.Charset;
-import java.util.Arrays;
-import java.util.concurrent.Executor;
-import java.util.logging.Logger;
-
-import javax.inject.Inject;
-
-import androidx.annotation.Nullable;
-import androidx.annotation.UiThread;
-
-import static java.util.logging.Level.INFO;
-import static java.util.logging.Logger.getLogger;
-
-@UiThread
-@NotNullByDefault
-class MailboxPairViewModel extends DbViewModel
-		implements QrCodeDecoder.ResultCallback {
-	private static final Logger LOG =
-			getLogger(MailboxPairViewModel.class.getName());
-
-	private static final int VERSION_REQUIRED = 32;
-
-	@SuppressWarnings("CharsetObjectCanBeUsed") // Requires minSdkVersion >= 19
-	private static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");
-
-	private final CryptoComponent crypto;
-	private final QrCodeDecoder qrCodeDecoder;
-
-	@Nullable
-	private String onionAddress = null;
-	@Nullable
-	private String setupToken = null;
-
-	@Inject
-	MailboxPairViewModel(
-			Application app,
-			@DatabaseExecutor Executor dbExecutor,
-			LifecycleManager lifecycleManager,
-			TransactionManager db,
-			AndroidExecutor androidExecutor,
-			@IoExecutor Executor ioExecutor,
-			CryptoComponent crypto) {
-		super(app, dbExecutor, lifecycleManager, db, androidExecutor);
-		this.crypto = crypto;
-		qrCodeDecoder = new QrCodeDecoder(androidExecutor, ioExecutor, this);
-	}
-
-	@Override
-	public void onQrCodeDecoded(Result result) {
-		LOG.info("Got result from decoder");
-		byte[] bytes = result.getText().getBytes(ISO_8859_1);
-
-		if (LOG.isLoggable(INFO))
-			LOG.info("QR code length in bytes: " + bytes.length);
-		if (bytes.length != 65) {
-			LOG.info("QR code has wrong length");
-			return;
-		}
-
-		if (LOG.isLoggable(INFO))
-			LOG.info("QR code version: " + bytes[0]);
-		if (bytes[0] != VERSION_REQUIRED) {
-			LOG.info("QR code has wrong version");
-			return;
-		}
-
-		byte[] onionPubKey = Arrays.copyOfRange(bytes, 1, 33);
-		onionAddress = crypto.encodeOnionAddress(onionPubKey);
-		setupToken = StringUtils.toHexString(Arrays.copyOfRange(bytes, 33, 65))
-				.toLowerCase();
-		LOG.info("QR code is valid");
-	}
-
-	QrCodeDecoder getQrCodeDecoder() {
-		return qrCodeDecoder;
-	}
-
-}

briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxScanFragment.java

@@ -0,0 +1,100 @@
+package org.briarproject.briar.android.mailbox;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Toast;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.qrcode.CameraException;
+import org.briarproject.briar.android.qrcode.CameraView;
+
+import java.util.logging.Logger;
+
+import javax.annotation.Nullable;
+import javax.inject.Inject;
+
+import androidx.annotation.UiThread;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+import androidx.lifecycle.ViewModelProvider;
+
+import static android.widget.Toast.LENGTH_LONG;
+import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
+import static org.briarproject.briar.android.AppModule.getAndroidComponent;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class MailboxScanFragment extends Fragment {
+
+	static final String TAG = MailboxScanFragment.class.getName();
+
+	private static final Logger LOG = Logger.getLogger(TAG);
+
+	@Inject
+	ViewModelProvider.Factory viewModelFactory;
+
+	private MailboxViewModel viewModel;
+
+	private CameraView cameraView;
+
+	@Override
+	public void onAttach(Context context) {
+		super.onAttach(context);
+		FragmentActivity activity = requireActivity();
+		getAndroidComponent(activity).inject(this);
+		viewModel = new ViewModelProvider(activity, viewModelFactory)
+				.get(MailboxViewModel.class);
+	}
+
+	@Nullable
+	@Override
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		return inflater.inflate(R.layout.fragment_mailbox_scan, container,
+				false);
+	}
+
+	@Override
+	public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
+		super.onViewCreated(view, savedInstanceState);
+		cameraView = view.findViewById(R.id.camera_view);
+		cameraView.setPreviewConsumer(viewModel.getQrCodeDecoder());
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		requireActivity().setTitle(R.string.mailbox_setup_button_scan);
+		try {
+			cameraView.start();
+		} catch (CameraException e) {
+			logCameraExceptionAndFinish(e);
+		}
+	}
+
+	@Override
+	public void onStop() {
+		super.onStop();
+		try {
+			cameraView.stop();
+		} catch (CameraException e) {
+			logCameraExceptionAndFinish(e);
+		}
+	}
+
+	@UiThread
+	private void logCameraExceptionAndFinish(CameraException e) {
+		logException(LOG, WARNING, e);
+		Toast.makeText(requireContext(), R.string.camera_error,
+				LENGTH_LONG).show();
+		requireActivity().getSupportFragmentManager().popBackStack();
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxState.java

@@ -0,0 +1,43 @@
+package org.briarproject.briar.android.mailbox;
+
+import org.briarproject.bramble.api.mailbox.MailboxProperties;
+import org.briarproject.bramble.api.mailbox.MailboxStatus;
+
+import androidx.annotation.Nullable;
+
+class MailboxState {
+
+	static class NotSetup extends MailboxState {
+	}
+
+	static class ScanningQrCode extends MailboxState {
+	}
+
+	static class SettingUp extends MailboxState {
+	}
+
+	static class QrCodeWrong extends MailboxState {
+	}
+
+	static class OfflineInSetup extends MailboxState {
+		@Nullable
+		final MailboxProperties mailboxProperties;
+
+		OfflineInSetup(@Nullable MailboxProperties mailboxProperties) {
+			this.mailboxProperties = mailboxProperties;
+		}
+
+		OfflineInSetup() {
+			this(null);
+		}
+	}
+
+	static class IsSetup extends MailboxState {
+		final MailboxStatus mailboxStatus;
+
+		IsSetup(MailboxStatus mailboxStatus) {
+			this.mailboxStatus = mailboxStatus;
+		}
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxViewModel.java

@@ -0,0 +1,180 @@
+package org.briarproject.briar.android.mailbox;
+
+import android.app.Application;
+
+import com.google.zxing.Result;
+
+import org.briarproject.bramble.api.FormatException;
+import org.briarproject.bramble.api.crypto.CryptoComponent;
+import org.briarproject.bramble.api.db.DatabaseExecutor;
+import org.briarproject.bramble.api.db.TransactionManager;
+import org.briarproject.bramble.api.lifecycle.IoExecutor;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager;
+import org.briarproject.bramble.api.mailbox.MailboxAuthToken;
+import org.briarproject.bramble.api.mailbox.MailboxProperties;
+import org.briarproject.bramble.api.mailbox.MailboxSettingsManager;
+import org.briarproject.bramble.api.mailbox.MailboxStatus;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.Plugin;
+import org.briarproject.bramble.api.plugin.PluginManager;
+import org.briarproject.bramble.api.plugin.TorConstants;
+import org.briarproject.bramble.api.system.AndroidExecutor;
+import org.briarproject.briar.android.mailbox.MailboxState.NotSetup;
+import org.briarproject.briar.android.qrcode.QrCodeDecoder;
+import org.briarproject.briar.android.viewmodel.DbViewModel;
+import org.briarproject.briar.android.viewmodel.LiveEvent;
+import org.briarproject.briar.android.viewmodel.MutableLiveEvent;
+
+import java.nio.charset.Charset;
+import java.util.Arrays;
+import java.util.concurrent.Executor;
+import java.util.logging.Logger;
+
+import javax.inject.Inject;
+
+import androidx.annotation.UiThread;
+
+import static java.util.Objects.requireNonNull;
+import static java.util.logging.Level.WARNING;
+import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.api.plugin.Plugin.State.ACTIVE;
+
+@NotNullByDefault
+class MailboxViewModel extends DbViewModel
+		implements QrCodeDecoder.ResultCallback {
+
+	private static final Logger LOG =
+			getLogger(MailboxViewModel.class.getName());
+
+	@SuppressWarnings("CharsetObjectCanBeUsed") // Requires minSdkVersion >= 19
+	private static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");
+	private static final int VERSION_REQUIRED = 32;
+
+	private final CryptoComponent crypto;
+	private final QrCodeDecoder qrCodeDecoder;
+	private final PluginManager pluginManager;
+	private final MailboxSettingsManager mailboxSettingsManager;
+
+	private final MutableLiveEvent<MailboxState> state =
+			new MutableLiveEvent<>();
+
+	@Inject
+	MailboxViewModel(
+			Application app,
+			@DatabaseExecutor Executor dbExecutor,
+			LifecycleManager lifecycleManager,
+			TransactionManager db,
+			AndroidExecutor androidExecutor,
+			@IoExecutor Executor ioExecutor,
+			CryptoComponent crypto,
+			PluginManager pluginManager,
+			MailboxSettingsManager mailboxSettingsManager) {
+		super(app, dbExecutor, lifecycleManager, db, androidExecutor);
+		this.crypto = crypto;
+		this.pluginManager = pluginManager;
+		this.mailboxSettingsManager = mailboxSettingsManager;
+		qrCodeDecoder = new QrCodeDecoder(androidExecutor, ioExecutor, this);
+		checkIfSetup();
+	}
+
+	@UiThread
+	private void checkIfSetup() {
+		runOnDbThread(true, txn -> {
+			MailboxProperties props =
+					mailboxSettingsManager.getOwnMailboxProperties(txn);
+			if (props == null) state.postEvent(new NotSetup());
+			else {
+				MailboxStatus mailboxStatus =
+						mailboxSettingsManager.getOwnMailboxStatus(txn);
+				state.postEvent(new MailboxState.IsSetup(mailboxStatus));
+			}
+		}, this::handleException);
+	}
+
+	@UiThread
+	void onScanButtonClicked() {
+		if (isTorActive()) {
+			state.setEvent(new MailboxState.ScanningQrCode());
+		} else {
+			state.setEvent(new MailboxState.OfflineInSetup());
+		}
+	}
+
+	@Override
+	@IoExecutor
+	public void onQrCodeDecoded(Result result) {
+		LOG.info("Got result from decoder");
+		MailboxProperties properties;
+		try {
+			properties = decodeQrCode(result.getText());
+		} catch (FormatException e) {
+			state.postEvent(new MailboxState.QrCodeWrong());
+			return;
+		}
+		onMailboxPropertiesReceived(properties);
+	}
+
+	@IoExecutor
+	// TODO move this into core #2168
+	private MailboxProperties decodeQrCode(String payload)
+			throws FormatException {
+		byte[] bytes = payload.getBytes(ISO_8859_1);
+		if (bytes.length != 65) {
+			if (LOG.isLoggable(WARNING)) {
+				LOG.warning("QR code length is not 65: " + bytes.length);
+			}
+			throw new FormatException();
+		}
+		int version = bytes[0] & 0xFF;
+		if (version != VERSION_REQUIRED) {
+			if (LOG.isLoggable(WARNING)) {
+				LOG.warning("QR code has not version " + VERSION_REQUIRED +
+						": " + version);
+			}
+			throw new FormatException();
+		}
+		LOG.info("QR code is valid");
+		byte[] onionPubKey = Arrays.copyOfRange(bytes, 1, 33);
+		String onionAddress = crypto.encodeOnionAddress(onionPubKey);
+		byte[] tokenBytes = Arrays.copyOfRange(bytes, 33, 65);
+		MailboxAuthToken setupToken = new MailboxAuthToken(tokenBytes);
+		return new MailboxProperties(onionAddress, setupToken, true);
+	}
+
+	private void onMailboxPropertiesReceived(MailboxProperties properties) {
+		if (isTorActive()) {
+			// TODO pass props to core #2168
+			state.postEvent(new MailboxState.SettingUp());
+		} else {
+			state.postEvent(new MailboxState.OfflineInSetup(properties));
+		}
+	}
+
+	// TODO ideally also move this into core #2168
+	private boolean isTorActive() {
+		Plugin plugin = pluginManager.getPlugin(TorConstants.ID);
+		return plugin != null && plugin.getState() == ACTIVE;
+	}
+
+	@UiThread
+	void tryAgainWhenOffline() {
+		MailboxState.OfflineInSetup offline =
+				(MailboxState.OfflineInSetup) requireNonNull(
+						state.getLastValue());
+		if (offline.mailboxProperties == null) {
+			onScanButtonClicked();
+		} else {
+			onMailboxPropertiesReceived(offline.mailboxProperties);
+		}
+	}
+
+	@UiThread
+	QrCodeDecoder getQrCodeDecoder() {
+		return qrCodeDecoder;
+	}
+
+	@UiThread
+	LiveEvent<MailboxState> getState() {
+		return state;
+	}
+}

briar-android/src/main/java/org/briarproject/briar/android/mailbox/OfflineFragment.java

@@ -0,0 +1,80 @@
+package org.briarproject.briar.android.mailbox;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.navdrawer.TransportsActivity;
+
+import javax.inject.Inject;
+
+import androidx.annotation.Nullable;
+import androidx.core.widget.NestedScrollView;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+import androidx.lifecycle.ViewModelProvider;
+
+import static android.view.View.FOCUS_DOWN;
+import static org.briarproject.briar.android.AppModule.getAndroidComponent;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class OfflineFragment extends Fragment {
+
+	public static final String TAG = OfflineFragment.class.getName();
+
+	@Inject
+	ViewModelProvider.Factory viewModelFactory;
+
+	private MailboxViewModel viewModel;
+
+	private NestedScrollView scrollView;
+	protected Button buttonView;
+
+	@Override
+	public void onAttach(Context context) {
+		super.onAttach(context);
+		FragmentActivity activity = requireActivity();
+		getAndroidComponent(activity).inject(this);
+		viewModel = new ViewModelProvider(activity, viewModelFactory)
+				.get(MailboxViewModel.class);
+	}
+
+	@Nullable
+	@Override
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		View v = inflater
+				.inflate(R.layout.fragment_offline, container, false);
+
+		scrollView = (NestedScrollView) v;
+		Button checkButton = v.findViewById(R.id.checkButton);
+		checkButton.setOnClickListener(view -> {
+			Intent i = new Intent(requireContext(), TransportsActivity.class);
+			startActivity(i);
+		});
+		buttonView = v.findViewById(R.id.button);
+		buttonView.setOnClickListener(view -> {
+			getParentFragmentManager().popBackStackImmediate();
+			viewModel.tryAgainWhenOffline();
+		});
+
+		return v;
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		// Scroll down in case the screen is small, so the button is visible
+		scrollView.post(() -> scrollView.fullScroll(FOCUS_DOWN));
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/mailbox/SetupDownloadFragment.java

@@ -0,0 +1,93 @@
+package org.briarproject.briar.android.mailbox;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.ScrollView;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+
+import javax.inject.Inject;
+
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.contract.ActivityResultContracts.RequestMultiplePermissions;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+import androidx.lifecycle.ViewModelProvider;
+
+import static android.view.View.FOCUS_DOWN;
+import static org.briarproject.briar.android.AppModule.getAndroidComponent;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class SetupDownloadFragment extends Fragment {
+
+	static final String TAG = SetupDownloadFragment.class.getName();
+
+	@Inject
+	ViewModelProvider.Factory viewModelFactory;
+
+	private MailboxViewModel viewModel;
+
+	private CameraPermissionManager permissionManager;
+	private ScrollView scrollView;
+
+	private final ActivityResultLauncher<String[]> permissionLauncher =
+			registerForActivityResult(new RequestMultiplePermissions(), r -> {
+				permissionManager.onRequestPermissionResult(r);
+				if (permissionManager.checkPermissions()) {
+					scanCode();
+				}
+			});
+
+	@Override
+	public void onAttach(Context context) {
+		super.onAttach(context);
+		FragmentActivity activity = requireActivity();
+		getAndroidComponent(activity).inject(this);
+		viewModel = new ViewModelProvider(activity, viewModelFactory)
+				.get(MailboxViewModel.class);
+	}
+
+	@Nullable
+	@Override
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		View v = inflater.inflate(R.layout.fragment_mailbox_setup_download,
+				container, false);
+		scrollView = v.findViewById(R.id.scrollView);
+
+		permissionManager = new CameraPermissionManager(requireActivity(),
+				permissionLauncher::launch);
+
+		Button scanButton = v.findViewById(R.id.scanButton);
+		scanButton.setOnClickListener(view -> {
+			if (permissionManager.checkPermissions()) {
+				scanCode();
+			}
+		});
+		return v;
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		requireActivity().setTitle(R.string.mailbox_setup_title);
+		// Scroll down in case the screen is small, so the button is visible
+		scrollView.post(() -> scrollView.fullScroll(FOCUS_DOWN));
+		// Permissions may have been granted manually while we were stopped
+		permissionManager.resetPermissions();
+	}
+
+	private void scanCode() {
+		viewModel.onScanButtonClicked();
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/mailbox/SetupIntroFragment.java

@@ -0,0 +1,54 @@
+package org.briarproject.briar.android.mailbox;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.ScrollView;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+
+import static android.view.View.FOCUS_DOWN;
+import static org.briarproject.briar.android.util.UiUtils.showFragment;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class SetupIntroFragment extends Fragment {
+
+	static final String TAG = SetupIntroFragment.class.getName();
+
+	private ScrollView scrollView;
+
+	@Nullable
+	@Override
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		View v = inflater.inflate(R.layout.fragment_mailbox_setup_intro,
+				container, false);
+		scrollView = v.findViewById(R.id.scrollView);
+		Button button = v.findViewById(R.id.continueButton);
+		button.setOnClickListener(view -> {
+			FragmentManager fm = getParentFragmentManager();
+			Fragment f = new SetupDownloadFragment();
+			showFragment(fm, f, SetupDownloadFragment.TAG);
+		});
+		return v;
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		requireActivity().setTitle(R.string.mailbox_setup_title);
+		// Scroll down in case the screen is small, so the button is visible
+		scrollView.post(() -> scrollView.fullScroll(FOCUS_DOWN));
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/navdrawer/NavDrawerActivity.java

@@ -75,12 +75,15 @@ import static org.briarproject.bramble.api.plugin.Plugin.State.ENABLING;
 import static org.briarproject.bramble.api.plugin.Plugin.State.STARTING_STOPPING;
 import static org.briarproject.briar.android.BriarService.EXTRA_STARTUP_FAILED;
 import static org.briarproject.briar.android.BriarService.EXTRA_START_RESULT;
+import static org.briarproject.briar.android.TestingConstants.EXPIRY_DATE;
 import static org.briarproject.briar.android.TestingConstants.IS_DEBUG_BUILD;
 import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_PASSWORD;
 import static org.briarproject.briar.android.navdrawer.IntentRouter.handleExternalIntent;
+import static org.briarproject.briar.android.util.UiUtils.formatDateFull;
 import static org.briarproject.briar.android.util.UiUtils.getDaysUntilExpiry;
 import static org.briarproject.briar.android.util.UiUtils.observeOnce;
 import static org.briarproject.briar.android.util.UiUtils.resolveColorAttribute;
+import static org.briarproject.briar.android.util.UiUtils.shouldWarnOldAndroidExpiry;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -137,9 +140,11 @@ public class NavDrawerActivity extends BriarActivity implements
 		setContentView(R.layout.activity_nav_drawer);
 
 		BriarApplication app = (BriarApplication) getApplication();
-		if (IS_DEBUG_BUILD && !app.isInstrumentationTest()) {
-			navDrawerViewModel.showExpiryWarning()
-					.observe(this, this::showExpiryWarning);
+		if (!app.isInstrumentationTest()) {
+			if (IS_DEBUG_BUILD || shouldWarnOldAndroidExpiry()) {
+				navDrawerViewModel.showExpiryWarning()
+						.observe(this, this::showExpiryWarning);
+			}
 		}
 		navDrawerViewModel.shouldAskForDozeWhitelisting().observe(this, ask -> {
 			if (ask) showDozeDialog(getString(R.string.setup_doze_intro));
@@ -207,7 +212,9 @@ public class NavDrawerActivity extends BriarActivity implements
 	public void onStart() {
 		super.onStart();
 		lockManager.checkIfLockable();
-		if (IS_DEBUG_BUILD) navDrawerViewModel.checkExpiryWarning();
+		if (IS_DEBUG_BUILD || shouldWarnOldAndroidExpiry()) {
+			navDrawerViewModel.checkExpiryWarning();
+		}
 	}
 
 	@Override
@@ -377,14 +384,23 @@ public class NavDrawerActivity extends BriarActivity implements
 			return;
 		}
 
+		String text;
+		if (IS_DEBUG_BUILD) {
+			text = getResources().getQuantityString(
+					R.plurals.expiry_warning, (int) daysUntilExpiry,
+					(int) daysUntilExpiry);
+		} else {
+			text = getResources().getQuantityString(
+					R.plurals.old_android_expiry_warning, (int) daysUntilExpiry,
+					formatDateFull(this, EXPIRY_DATE),
+					(int) daysUntilExpiry);
+		}
+
 		ViewGroup expiryWarning = findViewById(R.id.expiryWarning);
 		if (show) {
 			// show expiry warning text
 			TextView expiryWarningText =
 					expiryWarning.findViewById(R.id.expiryWarningText);
-			String text = getResources().getQuantityString(
-					R.plurals.expiry_warning, (int) daysUntilExpiry,
-					(int) daysUntilExpiry);
 			expiryWarningText.setText(text);
 			// make close button functional
 			ImageView expiryWarningClose =

briar-android/src/main/java/org/briarproject/briar/android/settings/SettingsFragment.java

@@ -1,6 +1,7 @@
 package org.briarproject.briar.android.settings;
 
 import android.content.Context;
+import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
 import android.view.View;
@@ -8,6 +9,7 @@ import android.view.View;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.briar.R;
+import org.briarproject.briar.android.mailbox.MailboxActivity;
 import org.briarproject.briar.android.util.ActivityLaunchers.GetImageAdvanced;
 
 import javax.inject.Inject;
@@ -36,7 +38,7 @@ public class SettingsFragment extends PreferenceFragmentCompat {
 	private static final String PREF_KEY_FEEDBACK = "pref_key_send_feedback";
 	private static final String PREF_KEY_DEV = "pref_key_dev";
 	private static final String PREF_KEY_EXPLODE = "pref_key_explode";
-	private static final String PREF_KEY_SHARE_APP = "pref_key_share_app";
+	private static final String PREF_KEY_MAILBOX = "pref_key_mailbox";
 
 	@Inject
 	ViewModelProvider.Factory viewModelFactory;
@@ -70,6 +72,18 @@ public class SettingsFragment extends PreferenceFragmentCompat {
 			prefAvatar.setVisible(false);
 		}
 
+		Preference prefMailbox =
+				requireNonNull(findPreference(PREF_KEY_MAILBOX));
+		if (viewModel.shouldEnableMailbox()) {
+			prefMailbox.setOnPreferenceClickListener(preference -> {
+				Intent i = new Intent(requireContext(), MailboxActivity.class);
+				startActivity(i);
+				return true;
+			});
+		} else {
+			prefMailbox.setVisible(false);
+		}
+
 		Preference prefFeedback =
 				requireNonNull(findPreference(PREF_KEY_FEEDBACK));
 		prefFeedback.setOnPreferenceClickListener(preference -> {

briar-android/src/main/java/org/briarproject/briar/android/settings/SettingsViewModel.java

@@ -161,6 +161,10 @@ class SettingsViewModel extends DbViewModel implements EventListener {
 		return featureFlags.shouldEnableProfilePictures();
 	}
 
+	boolean shouldEnableMailbox() {
+		return featureFlags.shouldEnableMailbox();
+	}
+
 	private void loadOwnIdentityInfo() {
 		runOnDbThread(() -> {
 			try {

briar-android/src/main/java/org/briarproject/briar/android/splash/ExpiredOldAndroidActivity.java

@@ -0,0 +1,57 @@
+package org.briarproject.briar.android.splash;
+
+import android.content.Intent;
+import android.os.Bundle;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.bramble.api.system.AndroidWakeLockManager;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.activity.BaseActivity;
+import org.briarproject.briar.android.controller.BriarController;
+import org.briarproject.briar.android.logout.ExitActivity;
+
+import javax.annotation.Nullable;
+import javax.inject.Inject;
+
+import static android.content.Intent.FLAG_ACTIVITY_CLEAR_TASK;
+import static android.content.Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS;
+import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
+import static android.content.Intent.FLAG_ACTIVITY_NO_ANIMATION;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class ExpiredOldAndroidActivity extends BaseActivity {
+
+	@Inject
+	BriarController briarController;
+	@Inject
+	AndroidWakeLockManager wakeLockManager;
+
+	@Override
+	public void onCreate(@Nullable Bundle state) {
+		super.onCreate(state);
+
+		setContentView(R.layout.activity_expired_old_android);
+		findViewById(R.id.delete_account_button).setOnClickListener(v -> {
+			// Hold a wake lock to ensure we exit before the device goes to sleep
+			wakeLockManager.runWakefully(() -> {
+				// we're not signed in, just go ahead and delete
+				briarController.deleteAccount();
+				// remove from recent apps
+				Intent i = new Intent(this, ExitActivity.class);
+				i.addFlags(FLAG_ACTIVITY_NEW_TASK
+						| FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS
+						| FLAG_ACTIVITY_NO_ANIMATION
+						| FLAG_ACTIVITY_CLEAR_TASK);
+				startActivity(i);
+			}, "DeleteAccount");
+		});
+	}
+
+	@Override
+	public void injectActivity(ActivityComponent component) {
+		component.inject(this);
+	}
+}

briar-android/src/main/java/org/briarproject/briar/android/splash/SplashScreenActivity.java

@@ -27,6 +27,7 @@ import static java.lang.System.currentTimeMillis;
 import static java.util.logging.Logger.getLogger;
 import static org.briarproject.briar.android.BriarApplication.ENTRY_ACTIVITY;
 import static org.briarproject.briar.android.TestingConstants.EXPIRY_DATE;
+import static org.briarproject.briar.android.TestingConstants.IS_DEBUG_BUILD;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -65,8 +66,13 @@ public class SplashScreenActivity extends BaseActivity {
 					getResources().getInteger(R.integer.splashScreenDuration);
 			new Handler().postDelayed(() -> {
 				if (currentTimeMillis() >= EXPIRY_DATE) {
-					LOG.info("Expired");
-					startNextActivity(ExpiredActivity.class);
+					if (IS_DEBUG_BUILD) {
+						LOG.info("Expired: debug build");
+						startNextActivity(ExpiredActivity.class);
+					} else {
+						LOG.info("Expired: running on old Android");
+						startNextActivity(ExpiredOldAndroidActivity.class);
+					}
 				} else {
 					startNextActivity(ENTRY_ACTIVITY);
 				}

briar-android/src/main/java/org/briarproject/briar/android/util/ActivityLaunchers.java

@@ -10,12 +10,14 @@ import androidx.activity.result.contract.ActivityResultContract;
 import androidx.activity.result.contract.ActivityResultContracts.CreateDocument;
 import androidx.activity.result.contract.ActivityResultContracts.GetContent;
 import androidx.activity.result.contract.ActivityResultContracts.GetMultipleContents;
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
 import static android.app.Activity.RESULT_CANCELED;
 import static android.bluetooth.BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE;
 import static android.bluetooth.BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION;
 import static android.content.Intent.EXTRA_MIME_TYPES;
+import static android.content.Intent.FLAG_GRANT_READ_URI_PERMISSION;
 import static android.os.Build.VERSION.SDK_INT;
 import static org.briarproject.bramble.util.AndroidUtils.getSupportedImageContentTypes;
 
@@ -23,6 +25,7 @@ import static org.briarproject.bramble.util.AndroidUtils.getSupportedImageConten
 public class ActivityLaunchers {
 
 	public static class CreateDocumentAdvanced extends CreateDocument {
+		@NonNull
 		@Override
 		public Intent createIntent(Context context, String input) {
 			Intent i = super.createIntent(context, input);
@@ -32,20 +35,24 @@ public class ActivityLaunchers {
 	}
 
 	public static class GetContentAdvanced extends GetContent {
+		@NonNull
 		@Override
 		public Intent createIntent(Context context, String input) {
 			Intent i = super.createIntent(context, input);
 			putShowAdvancedExtra(i);
+			i.addFlags(FLAG_GRANT_READ_URI_PERMISSION);
 			return i;
 		}
 	}
 
 	public static class GetImageAdvanced extends GetContent {
+		@NonNull
 		@Override
 		public Intent createIntent(Context context, String input) {
 			Intent i = super.createIntent(context, input);
 			putShowAdvancedExtra(i);
 			i.setType("image/*");
+			i.addFlags(FLAG_GRANT_READ_URI_PERMISSION);
 			if (SDK_INT >= 19)
 				i.putExtra(EXTRA_MIME_TYPES, getSupportedImageContentTypes());
 			return i;
@@ -54,11 +61,13 @@ public class ActivityLaunchers {
 
 	@TargetApi(18)
 	public static class GetMultipleImagesAdvanced extends GetMultipleContents {
+		@NonNull
 		@Override
 		public Intent createIntent(Context context, String input) {
 			Intent i = super.createIntent(context, input);
 			putShowAdvancedExtra(i);
 			i.setType("image/*");
+			i.addFlags(FLAG_GRANT_READ_URI_PERMISSION);
 			if (SDK_INT >= 19)
 				i.putExtra(EXTRA_MIME_TYPES, getSupportedImageContentTypes());
 			return i;
@@ -67,6 +76,7 @@ public class ActivityLaunchers {
 
 	public static class RequestBluetoothDiscoverable
 			extends ActivityResultContract<Integer, Boolean> {
+		@NonNull
 		@Override
 		public Intent createIntent(Context context, Integer duration) {
 			Intent i = new Intent(ACTION_REQUEST_DISCOVERABLE);

briar-android/src/main/java/org/briarproject/briar/android/util/Permission.java

@@ -0,0 +1,5 @@
+package org.briarproject.briar.android.util;
+
+public enum Permission {
+	UNKNOWN, GRANTED, SHOW_RATIONALE, PERMANENTLY_DENIED
+}

briar-android/src/main/java/org/briarproject/briar/android/util/UiUtils.java

@@ -52,6 +52,7 @@ import androidx.annotation.ColorRes;
 import androidx.annotation.DrawableRes;
 import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
+import androidx.annotation.StringRes;
 import androidx.annotation.UiThread;
 import androidx.appcompat.app.AlertDialog;
 import androidx.core.content.ContextCompat;
@@ -110,6 +111,8 @@ import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.briar.BuildConfig.APPLICATION_ID;
 import static org.briarproject.briar.android.TestingConstants.EXPIRY_DATE;
+import static org.briarproject.briar.android.TestingConstants.IS_OLD_ANDROID;
+import static org.briarproject.briar.android.TestingConstants.OLD_ANDROID_WARN_DATE;
 import static org.briarproject.briar.android.reporting.CrashReportActivity.EXTRA_APP_LOGCAT;
 import static org.briarproject.briar.android.reporting.CrashReportActivity.EXTRA_APP_START_TIME;
 import static org.briarproject.briar.android.reporting.CrashReportActivity.EXTRA_INITIAL_COMMENT;
@@ -144,6 +147,10 @@ public class UiUtils {
 
 	public static void showFragment(FragmentManager fm, Fragment f,
 			@Nullable String tag, boolean addToBackStack) {
+		// don't re-add same (already added/visible) fragment again
+		Fragment fragment = fm.findFragmentByTag(tag);
+		if (fragment != null && fragment.isAdded()) return;
+
 		FragmentTransaction ta = fm.beginTransaction()
 				.setCustomAnimations(R.anim.step_next_in,
 						R.anim.step_previous_out, R.anim.step_previous_in,
@@ -197,6 +204,11 @@ public class UiUtils {
 		return DateUtils.formatDateTime(ctx, time, flags);
 	}
 
+	public static String formatDateFull(Context ctx, long time) {
+		return DateUtils.formatDateTime(ctx, time,
+				FORMAT_SHOW_DATE | FORMAT_SHOW_YEAR | FORMAT_ABBREV_ALL);
+	}
+
 	/**
 	 * Returns the given duration in a human-friendly format. For example,
 	 * "7 days" or "1 hour 3 minutes".
@@ -232,6 +244,11 @@ public class UiUtils {
 		return (EXPIRY_DATE - now) / DAYS.toMillis(1);
 	}
 
+	public static boolean shouldWarnOldAndroidExpiry() {
+		return IS_OLD_ANDROID &&
+				System.currentTimeMillis() >= OLD_ANDROID_WARN_DATE;
+	}
+
 	public static SpannableStringBuilder getTeaser(Context ctx, Spanned text) {
 		if (text.length() < TEASER_LENGTH)
 			throw new IllegalArgumentException(
@@ -562,4 +579,26 @@ public class UiUtils {
 				SOFT_INPUT_STATE_HIDDEN);
 	}
 
+	public static void showDenialDialog(FragmentActivity ctx,
+			@StringRes int title, @StringRes int body) {
+		AlertDialog.Builder builder =
+				new AlertDialog.Builder(ctx, R.style.BriarDialogTheme);
+		builder.setTitle(title);
+		builder.setMessage(body);
+		builder.setPositiveButton(R.string.ok, getGoToSettingsListener(ctx));
+		builder.setNegativeButton(R.string.cancel,
+				(dialog, which) -> ctx.supportFinishAfterTransition());
+		builder.show();
+	}
+
+	public static void showRationale(FragmentActivity ctx, @StringRes int title,
+			@StringRes int body, Runnable requestPermissions) {
+		AlertDialog.Builder builder =
+				new AlertDialog.Builder(ctx, R.style.BriarDialogTheme);
+		builder.setTitle(title);
+		builder.setMessage(body);
+		builder.setNeutralButton(R.string.continue_button,
+				(dialog, which) -> requestPermissions.run());
+		builder.show();
+	}
 }

briar-android/src/main/res/drawable-night/ic_mailbox_onboarding.xml

@@ -0,0 +1,124 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+	android:width="200dp"
+	android:height="160dp"
+	android:viewportWidth="250"
+	android:viewportHeight="200">
+	<path
+		android:fillColor="#15212D"
+		android:pathData="M95.436,100.233C95.436,93.523 100.876,88.084 107.585,88.084H130.365C137.074,88.084 142.514,93.523 142.514,100.233V123.012C142.514,129.722 137.074,135.161 130.365,135.161H107.585C100.876,135.161 95.436,129.722 95.436,123.012V100.233Z" />
+	<path
+		android:fillColor="#15212D"
+		android:pathData="M102.336,10.261C102.336,4.594 106.93,0 112.597,0H131.836C137.503,0 142.097,4.594 142.097,10.261V29.5C142.097,35.167 137.503,39.761 131.836,39.761H112.597C106.93,39.761 102.336,35.167 102.336,29.5V10.261Z" />
+	<path
+		android:fillColor="#15212D"
+		android:pathData="M34.818,148.09C34.818,143.427 38.599,139.646 43.262,139.646H59.093C63.757,139.646 67.537,143.427 67.537,148.09V163.921C67.537,168.585 63.757,172.365 59.093,172.365H43.262C38.599,172.365 34.818,168.585 34.818,163.921V148.09Z" />
+	<path
+		android:fillColor="#15212D"
+		android:pathData="M110.024,186.044C110.024,183.557 112.04,181.541 114.527,181.541H122.971C125.458,181.541 127.475,183.557 127.475,186.044V194.488C127.475,196.976 125.458,198.992 122.971,198.992H114.527C112.04,198.992 110.024,196.976 110.024,194.488V186.044Z" />
+	<path
+		android:fillColor="#15212D"
+		android:pathData="M173.713,141.6C173.713,134.89 179.152,129.451 185.862,129.451H208.641C215.351,129.451 220.79,134.89 220.79,141.6V164.38C220.79,171.089 215.351,176.528 208.641,176.528H185.862C179.152,176.528 173.713,171.089 173.713,164.38V141.6Z" />
+	<path
+		android:fillColor="#15212D"
+		android:pathData="M232.049,95.416C232.049,92.928 234.065,90.912 236.553,90.912H244.997C247.484,90.912 249.5,92.928 249.5,95.416V103.86C249.5,106.347 247.484,108.363 244.997,108.363H236.553C234.065,108.363 232.049,106.347 232.049,103.86V95.416Z" />
+	<path
+		android:fillColor="#657D99"
+		android:fillType="evenOdd"
+		android:pathData="M120.481,84.227V45.268H122.481V84.227H120.481Z" />
+	<path
+		android:fillColor="#657D99"
+		android:fillType="evenOdd"
+		android:pathData="M117.685,176.101L117.685,139.646H119.685L119.685,176.101H117.685Z" />
+	<path
+		android:fillColor="#657D99"
+		android:fillType="evenOdd"
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+	<path
+		android:fillColor="#74B816"
+		android:fillType="evenOdd"
+		android:pathData="M41.177,64.517V62.648H43.177V64.517H41.177ZM41.177,71.991V68.254H43.177V71.991H41.177ZM41.177,79.465V75.728H43.177V79.465H41.177ZM41.177,86.938V83.202H43.177V86.938H41.177ZM41.177,94.412V90.675H43.177V94.412H41.177ZM41.177,99.018V98.149H43.177V99.018H44.91V101.018H39.681V99.018H41.177ZM24.705,101.018H22.209V99.018H24.705V101.018ZM34.689,101.018H29.697V99.018H34.689V101.018ZM52.107,101.018H50.374V99.018H54.854V101.018H54.107V102.148H52.107V101.018ZM61.844,101.018H58.349V99.018H61.844V101.018ZM67.087,101.018H65.339V99.018H67.087C68.048,99.018 68.966,99.209 69.805,99.557L69.039,101.404C68.439,101.156 67.78,101.018 67.087,101.018ZM72.187,106.118C72.187,105.425 72.049,104.766 71.8,104.166L73.648,103.4C73.995,104.239 74.187,105.157 74.187,106.118C74.187,106.812 74.325,107.47 74.574,108.07L72.726,108.836C72.378,107.998 72.187,107.079 72.187,106.118ZM52.107,110.668V106.408H54.107V110.668H52.107ZM79.287,113.218C78.326,113.218 77.408,113.027 76.569,112.679L77.335,110.832C77.935,111.081 78.594,111.218 79.287,111.218H81.59V113.218H79.287ZM88.5,113.218H86.197V111.218H88.5V113.218ZM52.107,119.188V114.928H54.107V119.188H52.107ZM52.107,127.709V123.449H54.107V127.709H52.107ZM52.107,134.099V131.969H54.107V134.099H52.107Z" />
+	<path
+		android:fillColor="#74B816"
+		android:fillType="evenOdd"
+		android:pathData="M105.214,134.93L105.602,132.968C106.242,133.095 106.905,133.161 107.585,133.161H109.484V135.161H107.585C106.774,135.161 105.981,135.082 105.214,134.93ZM128.466,135.161V133.161H130.365C131.045,133.161 131.708,133.095 132.347,132.968L132.736,134.93C131.969,135.082 131.176,135.161 130.365,135.161H128.466ZM137.115,133.115L136.002,131.453C137.11,130.712 138.064,129.757 138.805,128.65L140.467,129.762C139.58,131.087 138.44,132.228 137.115,133.115ZM142.514,102.131H140.514V100.233C140.514,99.553 140.447,98.89 140.32,98.25L142.282,97.862C142.434,98.629 142.514,99.422 142.514,100.233V102.131ZM140.467,93.483L138.805,94.595C138.064,93.488 137.11,92.534 136.002,91.792L137.115,90.13C138.44,91.017 139.58,92.158 140.467,93.483ZM109.484,88.084H107.585C106.774,88.084 105.981,88.163 105.214,88.315L105.602,90.277C106.242,90.151 106.905,90.084 107.585,90.084H109.484V88.084ZM100.835,90.13L101.948,91.792C100.84,92.534 99.886,93.488 99.145,94.595L97.483,93.483C98.37,92.158 99.51,91.017 100.835,90.13ZM95.436,121.114H97.436V123.012C97.436,123.693 97.503,124.355 97.63,124.995L95.668,125.383C95.516,124.616 95.436,123.824 95.436,123.012V121.114ZM97.483,129.762L99.145,128.65C99.886,129.757 100.84,130.712 101.948,131.453L100.835,133.115C99.51,132.228 98.37,131.087 97.483,129.762ZM95.436,117.317H97.436V113.521H95.436V117.317ZM95.436,109.724H97.436V105.928H95.436V109.724ZM95.436,102.131H97.436V100.233C97.436,99.553 97.503,98.89 97.63,98.25L95.668,97.862C95.516,98.629 95.436,99.422 95.436,100.233V102.131ZM113.28,88.084V90.084H117.077V88.084H113.28ZM120.873,88.084V90.084H124.67V88.084H120.873ZM128.466,88.084V90.084H130.365C131.045,90.084 131.708,90.151 132.347,90.277L132.736,88.315C131.969,88.163 131.176,88.084 130.365,88.084H128.466ZM142.514,105.928H140.514V109.724H142.514V105.928ZM142.514,113.521H140.514V117.317H142.514V113.521ZM142.514,121.114H140.514V123.012C140.514,123.693 140.447,124.355 140.32,124.995L142.282,125.383C142.434,124.616 142.514,123.824 142.514,123.012V121.114ZM124.67,135.161V133.161H120.873V135.161H124.67ZM117.077,135.161V133.161H113.28V135.161H117.077Z" />
+	<path
+		android:fillColor="#74B816"
+		android:fillType="evenOdd"
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+	<path
+		android:fillColor="#74B816"
+		android:fillType="evenOdd"
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+	<path
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briar-android/src/main/res/drawable/border_qr_scanner.xml

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briar-android/src/main/res/drawable/ic_mailbox.xml

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briar-android/src/main/res/drawable/ic_mailbox_onboarding.xml

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+		android:pathData="M29.825,34.881V54.164C29.825,55.73 31.1,57.021 32.682,57.021H34.021C35.586,57.021 36.877,55.73 36.877,54.164V34.881H29.825Z" />
+	<path
+		android:fillColor="#82C91E"
+		android:pathData="M36.861,25.587V21.956C36.861,20.391 35.586,19.1 34.021,19.1H32.682C31.116,19.1 29.825,20.391 29.825,21.956V25.587H36.861Z" />
+	<path
+		android:fillColor="#82C91E"
+		android:pathData="M52.514,41.239V21.956C52.514,20.391 51.239,19.1 49.674,19.1H48.334C46.769,19.1 45.478,20.391 45.478,21.956V41.239H52.514Z" />
+	<path
+		android:fillColor="#82C91E"
+		android:pathData="M45.478,50.533V54.164C45.478,55.729 46.769,57.02 48.334,57.02H49.674C51.239,57.02 52.53,55.729 52.53,54.164V50.533H45.478Z" />
+	<path
+		android:fillColor="#95DE2D"
+		android:pathData="M28.696,42.369H25.065C23.5,42.369 22.209,43.644 22.209,45.225V46.565C22.209,48.13 23.484,49.421 25.065,49.421H28.696V42.369Z" />
+	<path
+		android:fillColor="#95DE2D"
+		android:pathData="M57.274,42.369H37.99V49.421H57.274C58.839,49.421 60.13,48.13 60.13,46.565V45.225C60.13,43.644 58.839,42.369 57.274,42.369Z" />
+	<path
+		android:fillColor="#95DE2D"
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+	<path
+		android:fillColor="#95DE2D"
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+	<path
+		android:fillColor="#95DE2D"
+		android:fillType="evenOdd"
+		android:pathData="M108.864,100H129.086C129.852,100 130.587,100.305 131.129,100.848C131.671,101.39 131.975,102.126 131.975,102.894L131.975,127.695C131.975,128.8 130.688,129.403 129.841,128.695L124.6,124.308H108.864C108.098,124.308 107.363,124.003 106.821,123.46C106.279,122.917 105.975,122.181 105.975,121.414V102.894C105.975,102.126 106.279,101.39 106.821,100.848C107.363,100.305 108.098,100 108.864,100ZM116.549,112.823H110.597V104.63H127.353V112.823H121.499V115.656H123.64C124.026,115.656 124.22,116.123 123.947,116.397L119.331,121.021C119.161,121.19 118.887,121.19 118.718,121.021L114.102,116.397C113.829,116.123 114.022,115.656 114.408,115.656H116.549V112.823Z" />
+	<path
+		android:fillColor="#82C91E"
+		android:pathData="M190.408,151.656V162.803C190.408,163.708 191.145,164.454 192.059,164.454H192.833C193.738,164.454 194.484,163.708 194.484,162.803V151.656H190.408Z" />
+	<path
+		android:fillColor="#82C91E"
+		android:pathData="M194.475,146.283V144.184C194.475,143.279 193.738,142.533 192.833,142.533H192.059C191.154,142.533 190.408,143.279 190.408,144.184V146.283H194.475Z" />
+	<path
+		android:fillColor="#82C91E"
+		android:pathData="M203.523,155.331V144.184C203.523,143.279 202.786,142.533 201.881,142.533H201.107C200.202,142.533 199.456,143.279 199.456,144.184V155.331H203.523Z" />
+	<path
+		android:fillColor="#82C91E"
+		android:pathData="M199.456,160.705V162.804C199.456,163.709 200.202,164.455 201.107,164.455H201.881C202.786,164.455 203.533,163.709 203.533,162.804V160.705H199.456Z" />
+	<path
+		android:fillColor="#95DE2D"
+		android:pathData="M189.755,155.984H187.656C186.751,155.984 186.005,156.721 186.005,157.635V158.409C186.005,159.314 186.742,160.061 187.656,160.061H189.755V155.984Z" />
+	<path
+		android:fillColor="#95DE2D"
+		android:pathData="M206.275,155.984H195.128V160.061H206.275C207.18,160.061 207.926,159.314 207.926,158.409V157.635C207.926,156.721 207.18,155.984 206.275,155.984Z" />
+	<path
+		android:fillColor="#95DE2D"
+		android:pathData="M198.803,146.937H187.656C186.751,146.937 186.005,147.674 186.005,148.588V149.363C186.005,150.267 186.742,151.014 187.656,151.014H198.803V146.937Z" />
+	<path
+		android:fillColor="#95DE2D"
+		android:pathData="M206.275,146.937H204.176V151.014H206.275C207.18,151.014 207.926,150.277 207.926,149.363V148.588C207.926,147.674 207.18,146.937 206.275,146.937Z" />
+</vector>

briar-android/src/main/res/layout/activity_expired_old_android.xml

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:orientation="vertical">
+
+	<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_margin="@dimen/margin_large"
+		android:orientation="vertical">
+
+		<TextView
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:layout_margin="@dimen/margin_medium"
+			android:gravity="center"
+			android:text="@string/old_android_expiry_date_reached"
+			android:textSize="@dimen/text_size_large" />
+
+		<TextView
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:layout_margin="@dimen/margin_medium"
+			android:gravity="center"
+			android:text="@string/create_new_account"
+			android:textSize="@dimen/text_size_large" />
+
+		<TextView
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:layout_margin="@dimen/margin_medium"
+			android:gravity="center"
+			android:text="@string/old_android_delete_account"
+			android:textSize="@dimen/text_size_large" />
+
+		<Button
+			android:id="@+id/delete_account_button"
+			style="@style/BriarButton"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:layout_margin="@dimen/margin_medium"
+			android:text="@string/delete_account_button" />
+	</LinearLayout>
+</ScrollView>

briar-android/src/main/res/layout/activity_mailbox.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/fragmentContainer"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent">
+
+	<ProgressBar
+		android:id="@+id/progressBar"
+		style="?android:progressBarStyleLarge"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_gravity="center"
+		android:visibility="invisible"
+		tools:visibility="visible" />
+
+</FrameLayout>

briar-android/src/main/res/layout/fragment_mailbox_connecting.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent">
+
+	<ProgressBar
+		android:id="@+id/progressBar"
+		style="?android:attr/progressBarStyleLarge"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_margin="16dp"
+		app:layout_constraintBottom_toTopOf="@+id/textView"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent"
+		app:layout_constraintVertical_chainStyle="packed" />
+
+	<TextView
+		android:id="@+id/textView"
+		style="@style/TextAppearance.AppCompat.Large"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_margin="16dp"
+		android:text="@string/mailbox_setup_connecting"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/progressBar" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/fragment_mailbox_scan.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent">
+
+	<org.briarproject.briar.android.qrcode.CameraView
+		android:id="@+id/camera_view"
+		android:layout_width="0dp"
+		android:layout_height="0dp"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent" />
+
+	<View
+		android:layout_width="0dp"
+		android:layout_height="0dp"
+		android:layout_margin="16dp"
+		android:background="@drawable/border_qr_scanner"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintDimensionRatio="1,1"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

briar-android/src/main/res/layout/fragment_mailbox_setup_download.xml

@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/scrollView"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:fillViewport="true"
+	tools:context=".android.mailbox.MailboxActivity">
+
+	<androidx.constraintlayout.widget.ConstraintLayout
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content">
+
+		<ImageView
+			android:id="@+id/imageView"
+			android:layout_width="@dimen/hero_rect_width"
+			android:layout_height="@dimen/hero_rect_width"
+			android:layout_marginHorizontal="@dimen/margin_xlarge"
+			android:layout_marginTop="@dimen/margin_xlarge"
+			app:layout_constraintBottom_toTopOf="@+id/introView"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toTopOf="parent"
+			app:layout_constraintVertical_bias="0.25"
+			app:layout_constraintVertical_chainStyle="packed"
+			app:srcCompat="@drawable/ic_mailbox"
+			app:tint="@color/briar_brand_green"
+			tools:ignore="ContentDescription" />
+
+		<TextView
+			android:id="@+id/introView"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_marginHorizontal="@dimen/margin_xlarge"
+			android:layout_marginTop="@dimen/margin_xlarge"
+			android:layout_marginBottom="@dimen/margin_large"
+			android:text="@string/mailbox_setup_intro"
+			android:textAppearance="@style/TextAppearance.MaterialComponents.Body1"
+			app:layout_constraintBottom_toTopOf="@+id/scanButton"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/imageView" />
+
+		<Button
+			android:id="@+id/scanButton"
+			style="@style/BriarButton"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_margin="@dimen/margin_large"
+			android:drawablePadding="8dp"
+			android:text="@string/mailbox_setup_button_scan"
+			app:drawableLeftCompat="@drawable/ic_qr_code"
+			app:drawableStartCompat="@drawable/ic_qr_code"
+			app:drawableTint="@color/button_text"
+			app:layout_constraintBottom_toBottomOf="parent"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent"
+			tools:visibility="visible" />
+
+	</androidx.constraintlayout.widget.ConstraintLayout>
+
+</ScrollView>

briar-android/src/main/res/layout/fragment_mailbox_setup_intro.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/scrollView"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:fillViewport="true"
+	tools:context=".android.mailbox.MailboxActivity">
+
+	<androidx.constraintlayout.widget.ConstraintLayout
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content">
+
+		<ImageView
+			android:id="@+id/imageView"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:layout_marginHorizontal="@dimen/margin_xlarge"
+			android:layout_marginTop="@dimen/margin_xlarge"
+			app:layout_constraintBottom_toTopOf="@+id/introView"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toTopOf="parent"
+			app:layout_constraintVertical_bias="0.25"
+			app:layout_constraintVertical_chainStyle="packed"
+			app:srcCompat="@drawable/ic_mailbox_onboarding"
+			tools:ignore="ContentDescription" />
+
+		<TextView
+			android:id="@+id/introView"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_marginHorizontal="@dimen/margin_xlarge"
+			android:layout_marginTop="@dimen/margin_xlarge"
+			android:layout_marginBottom="@dimen/margin_large"
+			android:text="@string/mailbox_setup_intro"
+			android:textAppearance="@style/TextAppearance.MaterialComponents.Body1"
+			app:layout_constraintBottom_toTopOf="@+id/continueButton"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/imageView" />
+
+		<Button
+			android:id="@+id/continueButton"
+			style="@style/BriarButton"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_margin="@dimen/margin_large"
+			android:drawablePadding="8dp"
+			android:text="@string/continue_button"
+			app:layout_constraintBottom_toBottomOf="parent"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent"
+			tools:visibility="visible" />
+
+	</androidx.constraintlayout.widget.ConstraintLayout>
+
+</ScrollView>

briar-android/src/main/res/layout/fragment_offline.xml

@@ -0,0 +1,81 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:fillViewport="true">
+
+	<androidx.constraintlayout.widget.ConstraintLayout
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content">
+
+		<ImageView
+			android:id="@+id/iconView"
+			android:layout_width="@dimen/hero_square"
+			android:layout_height="@dimen/hero_square"
+			android:layout_marginHorizontal="@dimen/margin_xlarge"
+			android:layout_marginTop="@dimen/margin_xlarge"
+			app:layout_constraintBottom_toTopOf="@+id/titleView"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toTopOf="parent"
+			app:layout_constraintVertical_bias="0.25"
+			app:layout_constraintVertical_chainStyle="packed"
+			app:srcCompat="@drawable/transport_tor"
+			app:tint="@color/briar_red_500"
+			tools:ignore="ContentDescription" />
+
+		<TextView
+			android:id="@+id/titleView"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_marginHorizontal="@dimen/margin_xlarge"
+			android:layout_marginTop="@dimen/margin_xlarge"
+			android:gravity="center"
+			android:text="@string/offline"
+			android:textAppearance="@style/TextAppearance.MaterialComponents.Headline5"
+			app:layout_constraintBottom_toTopOf="@+id/textView"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/iconView" />
+
+		<TextView
+			android:id="@+id/textView"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_marginHorizontal="@dimen/margin_xlarge"
+			android:layout_marginTop="@dimen/margin_xlarge"
+			android:layout_marginBottom="@dimen/margin_large"
+			android:text="@string/tor_offline_description"
+			android:textAppearance="@style/TextAppearance.MaterialComponents.Body1"
+			app:layout_constraintBottom_toTopOf="@+id/checkButton"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/titleView" />
+
+		<Button
+			android:id="@+id/checkButton"
+			style="@style/BriarButtonFlat.Neutral"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:layout_margin="@dimen/margin_large"
+			android:text="@string/tor_offline_button_check"
+			app:layout_constraintBottom_toTopOf="@+id/button"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent" />
+
+		<Button
+			android:id="@+id/button"
+			style="@style/BriarButton"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_margin="@dimen/margin_large"
+			android:text="@string/try_again_button"
+			app:layout_constraintBottom_toBottomOf="parent"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent" />
+
+	</androidx.constraintlayout.widget.ConstraintLayout>
+
+</androidx.core.widget.NestedScrollView>

briar-android/src/main/res/values-bg/strings.xml

@@ -50,10 +50,17 @@
     <item quantity="one">Това е тестова версия на Briar. Вашият акаунт ще бъде изтече след %d ден и не може да бъде подновена.</item>
     <item quantity="other">Това е изпитателно издание на Briar. Валидността на профила ще изтече след %d дена и не може да бъде подновена.</item>
   </plurals>
+  <plurals name="old_android_expiry_warning">
+    <item quantity="one">Android 4 не се поддържа. Briar ще спре да работи на %s (след %d ден). Инсталирайте Briar на друго устройство и създайте нов профил.</item>
+    <item quantity="other">Android 4 не се поддържа. Briar ще спре да работи на %s (след %d дни). Инсталирайте Briar на друго устройство и създайте нов профил.</item>
+  </plurals>
   <string name="expiry_date_reached">Софтуерът е с изтекъл срок.\nБлагодарим за изпитването!</string>
   <string name="download_briar">За да продължите да използвате Briar изтеглете последното издание.</string>
   <string name="create_new_account">Ще трябва да създадете нов профил, но ще можете да използвате същия прякор.</string>
   <string name="download_briar_button">Изтегляне</string>
+  <string name="old_android_expiry_date_reached">Briar не работи на Android 4.\nИнсталирайте Briar на друго устройство.</string>
+  <string name="old_android_delete_account">За да премахнете профила от устройството докоснете бутона отдолу.</string>
+  <string name="delete_account_button">Премахване на профил</string>
   <string name="startup_open_database">Хранилището се дешифрира…</string>
   <string name="startup_migrate_database">Хранилището се обновява…</string>
   <string name="startup_compact_database">Хранилището се уплътнява…</string>
@@ -280,7 +287,7 @@
   <string name="duplicate_link_dialog_text_1">Вече има чакаща заявка за контакт с тази препратка: %s</string>
   <string name="duplicate_link_dialog_text_1_contact">Вече има контакт с тази препратка: %s</string>
   <!--This is a question asking whether two nicknames refer to the same person-->
-  <string name="duplicate_link_dialog_text_2">%s и %s един и същи човек ли са?</string>
+  <string name="duplicate_link_dialog_text_2">%1$s и %2$s един и същи човек ли са?</string>
   <!--This is a button for answering that two nicknames do indeed refer to the same person. This
 	string will be used in a dialog button, so if the translation of this string is longer than 20
 	characters, please use "Yes" instead, and use "No" for the "Different Person" button-->
@@ -289,7 +296,7 @@
 	will be used in a dialog button, so if the translation of this string longer than 20 characters,
 	please use "No" instead, and use "Yes" for the "Same Person" button-->
   <string name="different_person_button">Не</string>
-  <string name="duplicate_link_dialog_text_3">%s и %s са изпратили еднакви препратки.\n\nЕдиния от двамата вероятно се опитва да разбере кои са контактите ви.\n\nНе им споделяйте, че сте получили същата препратка от друг човек.</string>
+  <string name="duplicate_link_dialog_text_3">%1$s и %2$s са изпратили еднакви препратки.\n\nЕдиният от двамата вероятно се опитва да разбере кои са контактите ви.\n\nНе им споделяйте, че сте получили същата препратка от друг човек.</string>
   <string name="pending_contact_updated_toast">Обновена чакаща заявка за контакт</string>
   <!--Introductions-->
   <string name="introduction_onboarding_title">Запознаване на контакти</string>
@@ -418,8 +425,8 @@
   <string name="forum_invitation_response_accepted_sent">Приехте поканата от %s за членство във форум.</string>
   <string name="forum_invitation_response_declined_sent">Отказахте поканата на %s за членство във форум.</string>
   <string name="forum_invitation_response_declined_auto">Поканата от %s за членство във форум е отказана автоматично.</string>
-  <string name="forum_invitation_response_accepted_received">%s прие поканата във форум.</string>
-  <string name="forum_invitation_response_declined_received">%s отказа поканата във форум.</string>
+  <string name="forum_invitation_response_accepted_received">%s прие поканата за форум.</string>
+  <string name="forum_invitation_response_declined_received">%s отказа поканата за форум.</string>
   <string name="sharing_status">Състояние на споделяне</string>
   <string name="sharing_status_forum">Всеки участник във форума може да го сподели с контактите си. Споделяте този форум със следните контакти. Възможно е да има и други, които не можете да видите.</string>
   <string name="shared_with">Споделено с %1$d (на линия %2$d)</string>
@@ -510,11 +517,11 @@
   <!--Settings Security and Panic-->
   <string name="security_settings_title">Сигурност</string>
   <string name="pref_lock_title">Заключване на приложението</string>
-  <string name="pref_lock_summary">Заключва се екрана, за да предпази Briar докато сте вписани</string>
+  <string name="pref_lock_summary">Екранът се заключва, за да се предпази Briar докато сте вписани</string>
   <string name="pref_lock_disabled_summary">За да се възползвате от тази възможност, настройте заключване на екрана</string>
   <string name="pref_lock_timeout_title">Заключване при бездействие</string>
   <!--The %s placeholder is replaced with the following time spans, e.g. 5 Minutes, 1 Hour-->
-  <string name="pref_lock_timeout_summary">При неактивност Briar автоматично се заключав след %s</string>
+  <string name="pref_lock_timeout_summary">При неактивност Briar автоматично се заключва след %s</string>
   <!--Will be shown in a list of lock times. Should fit into the %s of "automatically lock it after %s"-->
   <string name="pref_lock_timeout_1">1 минута</string>
   <!--Will be shown in a list of lock times. Should fit into the %s of "automatically lock it after %s"-->
@@ -534,7 +541,7 @@
   <string name="password_changed">Паролата е променена.</string>
   <string name="panic_setting">Настройка на бутон за паника</string>
   <string name="panic_setting_title">Бутон за паника</string>
-  <string name="panic_setting_hint">Настройва се реакцията на Briar при използване на приложение за бутон за паника</string>
+  <string name="panic_setting_hint">Настройва се действието на Briar при използване на приложение за бутон за паника</string>
   <string name="panic_app_setting_title">Приложение бутон за паника</string>
   <string name="unknown_app">непознато приложение</string>
   <string name="panic_app_setting_summary">Няма зададено приложение</string>
@@ -568,6 +575,12 @@
   <string name="notify_sound_setting_disabled">Няма</string>
   <string name="choose_ringtone_title">Избор на тон за звънене</string>
   <string name="cannot_load_ringtone">Тонът за звънене не може да бъде зареден</string>
+  <!--Mailbox-->
+  <string name="mailbox_settings_title">Пощенска кутия</string>
+  <string name="mailbox_setup_title">Настройка като пощенска кутия</string>
+  <string name="mailbox_setup_intro">Пощенската кутия ви дава възможност да получавате съобщения от контактите ви докато сте извън мрежа. Кутията ще получава съобщенията и ще ги пази до като дойдете на линия.\n\nИнсталирайте приложението Birar Mailbox на резервно устройство. Включете го в захранване и с достъп до безжична мрежа, така че да е винаги на линия.</string>
+  <string name="mailbox_setup_connecting">Свързване…</string>
+  <string name="tor_offline_title">Извън линия</string>
   <!--Conversation Settings-->
   <string name="disappearing_messages_title">Изчезващи съобщения</string>
   <string name="disappearing_messages_explanation_long">При включване, тази настройка прави бъдещите съобщения в този разговор да изчезват след 7\u00A0дни.
@@ -605,6 +618,7 @@
   <string name="dev_report_memory">Памет</string>
   <string name="dev_report_storage">Хранилище</string>
   <string name="dev_report_connectivity">Свързаност</string>
+  <string name="dev_report_network_usage">Използване на мрежа</string>
   <string name="dev_report_build_config">Настройка на изданието</string>
   <string name="dev_report_logcat">Журнал на приложението</string>
   <string name="dev_report_device_features">Характеристики</string>
@@ -647,6 +661,8 @@
   <string name="transports_help_text">Briar може да се свърже с контактите ви през интернет, Wi-Fi или Bluetooth.\n\nЗа повече поверителност цялата връзка към интернет се пренасочва през мрежата на Tor.\n\nАко даден контакт може да бъде достъпен чрез няколко метода Briar ги използва успоредно.</string>
   <!--Share app offline-->
   <string name="hotspot_title">Споделяне на приложението извън мрежа</string>
+  <string name="hotspot_intro">Споделете приложението с някого наблизо без използване на интернет, а през Wi-Fi на устройствата.
+\n\nВашето устройство ще създаде безжична точка за достъп. Хората наблизо биха могли да се свържат към нея и да изтеглят Briar от вашето устройство.</string>
   <string name="hotspot_button_start_sharing">Включване на безжична точка</string>
   <string name="hotspot_button_stop_sharing">Спиране на безжична точка</string>
   <string name="hotspot_progress_text_start">Настройване на безжична точка…</string>
@@ -681,9 +697,27 @@
   <string name="website_download_outro">След като файлът се изтегли, отворете го и го инсталирайте.</string>
   <string name="website_troubleshooting_title">Отстраняване на неизправности</string>
   <string name="website_troubleshooting_1">Ако не можете да изтеглите приложението пробвайте с друг мрежов четец.</string>
+  <string name="hotspot_help_wifi_title">Проблеми при свързване чрез Wi-Fi:</string>
+  <string name="hotspot_help_wifi_1">Изключете и включете Wi-Fi и на двете устройства, и опитайте отново.</string>
+  <string name="hotspot_help_wifi_2">Ако устройството се оплаква, че безжичната мрежа няма достъп до интернет, останете свързани въпреки това.</string>
+  <string name="hotspot_help_wifi_3">Рестартирайте устройството, което създава безжичната точка за достъп, отворете Briar и го споделете отново.</string>
+  <string name="hotspot_help_site_title">Проблеми при посещаване на страницата:</string>
+  <string name="hotspot_help_site_1">Уверете се, че въвеждате адреса точно, както е показан. Дори малка грешка може да доведе до неуспех.</string>
+  <string name="hotspot_help_site_2">Уверете се, че устройството е свързано с правилната мрежа на Wi-Fi (вижте по-горе) докато отваряте страницата.</string>
+  <string name="hotspot_help_site_3">Ако имате инсталирано приложение за защитна стена се уверете, че не спира достъпа.</string>
   <string name="hotspot_help_fallback_title">Нищо не става?</string>
+  <string name="hotspot_help_fallback_intro">Запазете приложението като файл на APK и го споделете по друг начин. След като бъде получен от другото устройство може да бъде използван за инсталиране на Briar.
+\n\nЗабележка: За да го споделите чрез Bluetooth може да се наложи първо да го преименувате, така че да завършва на .zip.</string>
+  <string name="hotspot_help_fallback_button">Запазване на приложение</string>
   <!--error handling-->
+  <string name="hotspot_error_intro">Нещо се обърка при споделяне на приложението чрез Wi-Fi:</string>
+  <string name="hotspot_error_no_wifi_direct">Устройството не поддържа Wi-Fi Direct.</string>
+  <string name="hotspot_error_start_callback_failed">Безжичната точка не може да стартира: грешката е %s</string>
+  <string name="hotspot_error_start_callback_failed_unknown">Безжичната точка не може да стартира поради неизвестна грешка: причината е %d</string>
+  <string name="hotspot_error_start_callback_no_group_info">Безжичната точка не може да стартира: няма информация за група</string>
+  <string name="hotspot_error_web_server_start">Грешка при стартиране на уеб сървър</string>
   <!--Transfer Data via Removable Drives-->
+  <string name="removable_drive_menu_title">Свързване чрез преносим диск</string>
   <string name="removable_drive_title_send">Изпращане на сведения</string>
   <string name="removable_drive_title_receive">Получаване на сведения</string>
   <string name="removable_drive_send_intro">Докоснете бутона по-долу, за да бъде създаден файл, който ще съдържа шифрованите съобщения. Можете да изберете къде да бъде запазен този файл.\n\nАко желаете да го запазите на преносим диск го включете сега.</string>

briar-android/src/main/res/values-ca/strings.xml

@@ -49,6 +49,7 @@
   <string name="download_briar">Per continuar utilitzant Briar, baixeu la darrera versió.</string>
   <string name="create_new_account">Haureu de crear un compte nou, però podeu utilitzar el mateix sobrenom.</string>
   <string name="download_briar_button">Descarrega la darrera versió</string>
+  <string name="delete_account_button">Esborreu el compte</string>
   <string name="startup_open_database">S\'està desxifrant la base de dades...</string>
   <string name="startup_migrate_database">S\'està actualitzant la base de dades...</string>
   <string name="startup_compact_database">S\'està compactant la base de dades...</string>
@@ -159,7 +160,7 @@
   <string name="image_attach_error_invalid_mime_type">El format de la imatge no s\'admet: %s</string>
   <string name="set_contact_alias">Canvia el nom del contacte</string>
   <string name="set_contact_alias_hint">Nom del contacte</string>
-  <string name="menu_item_disappearing_messages">Missatges fonedissos</string>
+  <string name="menu_item_disappearing_messages">Missatges efímers</string>
   <!--The first placeholder will show a duration like "7 days". The second placeholder at the end will add "Tap to learn more."-->
   <string name="auto_delete_msg_you_enabled">Els vostres missatges es faran fonedissos en %1$s. %2$s</string>
   <!--The placeholder at the end will add "Tap to learn more."-->
@@ -276,7 +277,6 @@ Així que l\'actualitzi li veureu una icona diferent .</string>
   <string name="duplicate_link_dialog_text_1">Teniu una sol·licitud de contacte pendent amb l\'enllaç %s</string>
   <string name="duplicate_link_dialog_text_1_contact">Ja teniu un contacte amb aquest enllaç: %s</string>
   <!--This is a question asking whether two nicknames refer to the same person-->
-  <string name="duplicate_link_dialog_text_2">%s i %s són la mateixa persona?</string>
   <!--This is a button for answering that two nicknames do indeed refer to the same person. This
 	string will be used in a dialog button, so if the translation of this string is longer than 20
 	characters, please use "Yes" instead, and use "No" for the "Different Person" button-->
@@ -285,7 +285,6 @@ Així que l\'actualitzi li veureu una icona diferent .</string>
 	will be used in a dialog button, so if the translation of this string longer than 20 characters,
 	please use "No" instead, and use "Yes" for the "Same Person" button-->
   <string name="different_person_button">Persones diferents</string>
-  <string name="duplicate_link_dialog_text_3">%s i %s us han enviat el mateix enllaç.\n\nUn d\'ells pot estar provant de descobrir quins són els vostres contactes.\n\nNo els hi digueu que heu rebut el mateix enllaç d\'algú altre.</string>
   <string name="pending_contact_updated_toast">S\'ha actualitzat la sol·licitud de contacte pendent</string>
   <!--Introductions-->
   <string name="introduction_onboarding_title">Presenteu als vostres contactes</string>
@@ -560,8 +559,11 @@ Així que l\'actualitzi li veureu una icona diferent .</string>
   <string name="notify_sound_setting_disabled">Cap</string>
   <string name="choose_ringtone_title">Trieu el so d\'avís</string>
   <string name="cannot_load_ringtone">No s\'ha pogut carregar el so d\'avís</string>
+  <!--Mailbox-->
+  <string name="mailbox_setup_connecting">S\'està connectant...</string>
+  <string name="tor_offline_title">Fora de línia</string>
   <!--Conversation Settings-->
-  <string name="disappearing_messages_title">Missatges fonedissos</string>
+  <string name="disappearing_messages_title">Missatges efímers</string>
   <string name="learn_more">Més informació</string>
   <!--Settings Actions-->
   <string name="pref_category_actions">Accions</string>

briar-android/src/main/res/values-de/strings.xml

@@ -42,21 +42,28 @@
   <string name="dialog_message_lost_password">Dein Briar-Konto ist verschlüsselt auf deinem Gerät  und nicht in der Cloud gespeichert, deshalb kannst du dein Passwort nicht zurücksetzen. Willst du dein Konto löschen und neu beginnen?\n\nAchtung: Deine bestehenden Identitäten, Kontakte und Nachrichten gehen dann für immer verloren.</string>
   <string name="startup_failed_activity_title">Fehler beim Starten von Briar</string>
   <string name="startup_failed_clock_error">Briar konnte nicht gestartet werden, weil die Uhr deines Geräts falsch eingestellt ist.\n\Bitte stelle die Uhr deines Geräts auf die richtige Zeit ein und versuche es erneut.</string>
-  <string name="startup_failed_db_error">Briar konnte die Datenbank, die dein Konto, deine Kontakte und deine Nachrichten enthält, nicht öffnen.\n\nBitte aktualisiere auf die neueste Version der App und versuche es erneut, oder richte ein neues Konto ein, indem du bei der Passwortabfrage \"Ich habe mein Passwort vergessen\" wählst.</string>
-  <string name="startup_failed_data_too_old_error">Dein Konto wurde mit einer alten Version dieser App erstellt und kann mit dieser Version nicht geöffnet werden. Du musst entweder die alte Version neu installieren oder ein neues Konto einrichten, indem du bei der Passwortabfrage \"Ich habe mein Passwort vergessen\" wählst.</string>
-  <string name="startup_failed_data_too_new_error">Dein Konto wurde mit einer neueren Version dieser App erstellt und kann mit dieser Version nicht geöffnet werden.\n\nBitte aktualisiere auf die aktuelle Version und versuche es erneut.</string>
+  <string name="startup_failed_db_error">Briar konnte die Datenbank mit deinem Konto, deinen Kontakten und deinen Nachrichten nicht öffnen.\n\nBitte aktualisiere auf die neueste Version der App und versuche es erneut, oder richte ein neues Konto ein, indem du bei der Passwortabfrage \"Ich habe mein Passwort vergessen\" wählst.</string>
+  <string name="startup_failed_data_too_old_error">Dein Konto wurde mit einer alten Version dieser App erstellt und kann mit dieser Version nicht geöffnet werden.\n\nDu musst entweder die alte Version neu installieren oder ein neues Konto einrichten, indem du bei der Passwortabfrage \"Ich habe mein Passwort vergessen\" wählst.</string>
+  <string name="startup_failed_data_too_new_error">Dein Konto wurde mit einer neueren Version dieser App erstellt und kann mit dieser Version nicht geöffnet werden.\n\nBitte aktualisiere auf die neueste Version und versuche es erneut.</string>
   <string name="startup_failed_service_error">Briar konnte eine erforderliche Komponente nicht starten.\n\nBitte aktualisiere auf die neueste Version der App und versuche es erneut.</string>
   <plurals name="expiry_warning">
     <item quantity="one">Dies ist eine Testversion von Briar. Dein Konto läuft in %d Tag ab und kann nicht verlängert werden.</item>
     <item quantity="other">Dies ist eine Testversion von Briar. Dein Konto läuft in %d Tagen ab und kann nicht verlängert werden.</item>
   </plurals>
+  <plurals name="old_android_expiry_warning">
+    <item quantity="one">Android 4 wird nicht mehr unterstützt. Briar wird nicht mehr auf %s funktionieren (in %d Tag). Bitte installiere es auf einem neueren Gerät und erstelle ein neues Konto.</item>
+    <item quantity="other">Android 4 wird nicht mehr unterstützt. Briar wird nicht mehr auf %s funktionieren (in %dTagen). Bitte installiere es auf einem neueren Gerät und erstelle ein neues Konto.</item>
+  </plurals>
   <string name="expiry_date_reached">Diese Software ist abgelaufen.\nDanke, dass du Briar getestet hast!</string>
   <string name="download_briar">Bitte lade die aktuelle Version von Briar herunter, um es weiter zu benutzen.</string>
   <string name="create_new_account">Du wirst ein neues Konto erstellen müssen, wobei du jedoch wieder denselben Benutzernamen verwenden kannst.</string>
   <string name="download_briar_button">Aktuelle Version herunterladen</string>
+  <string name="old_android_expiry_date_reached">Briar wird auf Android 4 nicht mehr unterstützt.\nBitte installiere Briar auf einem neueren Gerät.</string>
+  <string name="old_android_delete_account">Du kannst auf die Schaltfläche unten tippen, um dein Konto von diesem Gerät zu löschen.</string>
+  <string name="delete_account_button">Konto löschen</string>
   <string name="startup_open_database">Datenbank wird entschlüsselt...</string>
   <string name="startup_migrate_database">Datenbank wird aktualisiert...</string>
-  <string name="startup_compact_database">Datenbank wird komprimiert ...</string>
+  <string name="startup_compact_database">Datenbank wird komprimiert…</string>
   <!--Navigation Drawer-->
   <string name="nav_drawer_open_description">Navigationsleiste öffnen</string>
   <string name="nav_drawer_close_description">Navigationsleiste schliessen</string>
@@ -261,7 +268,7 @@
   <string name="adding_contact_failed">Hinzufügen von Kontakt ist fehlgeschlagen</string>
   <string name="dialog_title_remove_pending_contact">Entfernung bestätigen</string>
   <string name="dialog_message_remove_pending_contact">Dieser Kontakt befindet sich noch beim Hinzufügen. Wenn er jetzt entfernt wird, wird das Hinzufügen abgebrochen.</string>
-  <string name="own_link_error">Gebe den Link deines Kontakts ein, nicht deinen eigenen.</string>
+  <string name="own_link_error">Gib den Link deines Kontakts ein, nicht deinen eigenen</string>
   <string name="nickname_missing">Bitte gib einen Spitznamen an</string>
   <string name="invalid_link">Ungültiger Link</string>
   <string name="unsupported_link">Dieser Link kommt von einer neueren Version von Briar. Bitte führe eine Aktualisierung auf die aktuelle Version durch und versuche es dann nochmal. </string>
@@ -276,11 +283,11 @@
     <item quantity="other">%d neue Kontakte hinzugefügt.</item>
   </plurals>
   <string name="offline_state">Keine Internetverbindung</string>
-  <string name="duplicate_link_dialog_title">Link duplizieren</string>
+  <string name="duplicate_link_dialog_title">Gleicher Link</string>
   <string name="duplicate_link_dialog_text_1">Du hast bereits einen Kontakt mit diesem Link ausstehend: %s</string>
   <string name="duplicate_link_dialog_text_1_contact">Du hast bereits einen Kontakt mit diesem Link: %s</string>
   <!--This is a question asking whether two nicknames refer to the same person-->
-  <string name="duplicate_link_dialog_text_2">Sind %s und %s dieselbe Person?</string>
+  <string name="duplicate_link_dialog_text_2">Sind %1$s und %2$s dieselbe Person?</string>
   <!--This is a button for answering that two nicknames do indeed refer to the same person. This
 	string will be used in a dialog button, so if the translation of this string is longer than 20
 	characters, please use "Yes" instead, and use "No" for the "Different Person" button-->
@@ -289,7 +296,7 @@
 	will be used in a dialog button, so if the translation of this string longer than 20 characters,
 	please use "No" instead, and use "Yes" for the "Same Person" button-->
   <string name="different_person_button">Andere Person</string>
-  <string name="duplicate_link_dialog_text_3">%s und %s haben Dir denselben Link geschickt.\n\nMöglicherweise versucht einer der beiden mehr über deine Kontakte zu erfahren.\n\nDu solltest deswegen niemandem sagen, dass du diesen Link auch von jemand anderem erhalten hast.</string>
+  <string name="duplicate_link_dialog_text_3">%1$s und %2$s haben dir denselben Link geschickt.\n\nMöglicherweise versucht einer der beiden mehr über deine Kontakte zu erfahren.\n\nDu solltest deswegen niemandem sagen, dass du diesen Link auch von jemand anderem erhalten hast.</string>
   <string name="pending_contact_updated_toast">Ausstehender Kontakt aktualisiert</string>
   <!--Introductions-->
   <string name="introduction_onboarding_title">Mache deine Kontakte untereinander bekannt</string>
@@ -307,7 +314,7 @@
   <string name="introduction_request_exists_received">%1$s schlägt vor, dich als Kontakt an %2$s zu empfehlen. %2$s ist allerdings bereits in deiner Kontaktliste. Da %1$s das vielleicht nicht weiss, kannst du trotzdem antworten:</string>
   <string name="introduction_request_answered_received">%1$s schlägt vor, dich als Kontakt an %2$s zu empfehlen. </string>
   <string name="introduction_response_accepted_sent">Du hast die Kontaktempfehlung von %1$s angenommen.</string>
-  <string name="introduction_response_accepted_sent_info">Bevor %1$s zu deinen Kontakten hinzugefügt werden, müssen sie die Kontaktempfehlung ebenfalls akzeptieren. Dies kann eine Weile dauern.</string>
+  <string name="introduction_response_accepted_sent_info">Bevor %1$s zu deinen Kontakten hinzugefügt wird, muss die Kontaktempfehlung ebenfalls akzeptieren werden. Dies kann eine Weile dauern.</string>
   <string name="introduction_response_declined_sent">Du hast die Kontaktempfehlung von %1$s abgelehnt.</string>
   <string name="introduction_response_declined_auto">Die Kontaktempfehlung mit %1$s wurde automatisch abgelehnt.</string>
   <string name="introduction_response_accepted_received">%1$s hat die Kontaktempfehlung für %2$s angenommen.</string>
@@ -326,9 +333,9 @@
   <!--Private Groups-->
   <string name="groups_list_empty">Keine Gruppen vorhanden</string>
   <string name="groups_list_empty_action">Tippe auf das + Symbol, um eine Gruppe anzulegen oder frage deine Kontakte, Gruppen mit dir zu teilen</string>
-  <string name="groups_created_by">Erstellt durch %s</string>
+  <string name="groups_created_by">Erstellt von %s</string>
   <plurals name="messages">
-    <item quantity="one">%d Nachrichten</item>
+    <item quantity="one">%d Nachricht</item>
     <item quantity="other">%d Nachrichten</item>
   </plurals>
   <string name="groups_group_is_empty">Diese Gruppe ist leer</string>
@@ -364,7 +371,7 @@
     <item quantity="one">%d offene Gruppeneinladung</item>
     <item quantity="other">%d offene Gruppeneinladungen</item>
   </plurals>
-  <string name="groups_invitations_response_accepted_sent">Gruppeneinladung von %s angenommen.</string>
+  <string name="groups_invitations_response_accepted_sent">Du hast die Gruppeneinladung von %s angenommen.</string>
   <string name="groups_invitations_response_declined_sent">Du hast die Gruppeneinladung abgelehnt von %s abgelehnt.</string>
   <string name="groups_invitations_response_declined_auto">Die Gruppeneinladung von %s wurde automatisch abgelehnt.</string>
   <string name="groups_invitations_response_accepted_received">%s hat die Gruppeneinladung angenommen.</string>
@@ -415,7 +422,7 @@
   <string name="forum_declined_toast">Einladung abgelehnt</string>
   <string name="shared_by_format">Geteilt durch %s</string>
   <string name="forum_invitation_already_sharing">Bereits geteilt.</string>
-  <string name="forum_invitation_response_accepted_sent">Du hast die Forumseinladung von %s angenommen.</string>
+  <string name="forum_invitation_response_accepted_sent">Du hast die Forumeinladung von %s angenommen.</string>
   <string name="forum_invitation_response_declined_sent">Du hast die Forumeinladung von %s abgelehnt.</string>
   <string name="forum_invitation_response_declined_auto">Die Forumeinladung von %s wurde automatisch abgelehnt.</string>
   <string name="forum_invitation_response_accepted_received">%s hat die Forumeinladung angenommen.</string>
@@ -456,7 +463,7 @@
   <string name="blogs_sharing_response_accepted_received">%s hat die Blogeinladung angenommen.</string>
   <string name="blogs_sharing_response_declined_received">%s hat die Blogeinladung abgelehnt.</string>
   <string name="blogs_sharing_invitation_received">%1$shat den Blog \"%2$s\" mit dir geteilt.</string>
-  <string name="blogs_sharing_invitation_sent">Du teilst den Blog \"%1$s\" mit %2$s.</string>
+  <string name="blogs_sharing_invitation_sent">Du hast den Blog \"%1$s\" mit %2$s geteilt.</string>
   <string name="blogs_sharing_invitations_title">Blogeinladungen</string>
   <string name="blogs_sharing_joined_toast">Blog abonniert</string>
   <string name="blogs_sharing_declined_toast">Einladung abgelehnt</string>
@@ -568,6 +575,22 @@
   <string name="notify_sound_setting_disabled">Keine</string>
   <string name="choose_ringtone_title">Klingelton auswählen</string>
   <string name="cannot_load_ringtone">Klingelton kann nicht geladen werden</string>
+  <!--Mailbox-->
+  <string name="mailbox_settings_title">Mailbox</string>
+  <string name="mailbox_setup_title">Mailbox-Einrichtung</string>
+  <string name="mailbox_setup_intro">Eine Mailbox ermöglicht es deinen Kontakten, dir Nachrichten zu senden, während du offline bist. Die Mailbox empfängt deine Nachrichten und speichert sie, bis du wieder online bist.\n
+		\nDu kannst die Briar Mailbox-App auf einem Ersatzgerät installieren. Sorge dafür, dass es mit Strom und WLAN verbunden ist, damit es immer online ist.</string>
+  <string name="mailbox_setup_download">Installiere zunächst die Mailbox-App auf einem anderen Gerät, indem du bei Google Play nach \"Briar Mailbox\" suchst oder dort, wo du Briar heruntergeladen hast.\n
+		\nVerbinde dann deine Mailbox mit Briar, indem du den angezeigten QR-Code der Mailbox-App scannst.</string>
+  <string name="mailbox_setup_download_link">Download-Link teilen</string>
+  <string name="mailbox_setup_button_scan">Mailbox QR-Code scannen</string>
+  <string name="permission_camera_qr_denied_body">Du hast den Zugriff auf die Kamera verweigert, aber das Scannen eines QR-Codes erfordert die Verwendung der Kamera.\n\nBitte gewähre den Zugriff.</string>
+  <string name="mailbox_setup_connecting">Verbinde…</string>
+  <string name="mailbox_setup_qr_code_wrong_title">Falscher QR-Code</string>
+  <string name="mailbox_setup_qr_code_wrong_description">Der gescannte Code ist ungültig. Bitte öffne die Briar Mailbox-App auf deinem Mailbox-Gerät und scanne den dort angezeigten QR-Code.</string>
+  <string name="tor_offline_title">Offline</string>
+  <string name="tor_offline_description">Stelle sicher, dass das Gerät online ist und Verbindungen zum Internet zugelassen sind.\n\nWarte anschließend, bis das Globussymbol in den Verbindungseinstellungen grün wird.</string>
+  <string name="tor_offline_button_check">Verbindungseinstellungen prüfen</string>
   <!--Conversation Settings-->
   <string name="disappearing_messages_title">Selbstlöschende Nachrichten</string>
   <string name="disappearing_messages_explanation_long">Wenn diese Einstellung aktiviert ist, werden neue
@@ -609,6 +632,7 @@
   <string name="dev_report_memory">Speicher</string>
   <string name="dev_report_storage">Speicher</string>
   <string name="dev_report_connectivity">Konnektivität</string>
+  <string name="dev_report_network_usage">Netzwerknutzung</string>
   <string name="dev_report_build_config">Buildkonfiguration</string>
   <string name="dev_report_logcat">App-Log</string>
   <string name="dev_report_device_features">Geräteeigenschaften</string>

briar-android/src/main/res/values-es/strings.xml

@@ -50,10 +50,17 @@
     <item quantity="one">Esta es una versión de prueba de Briar. Su cuenta expirará en %d día y no podrá ser renovada.</item>
     <item quantity="other">Esta es una versión de prueba de Briar. Tu cuenta expirará en %d días y no podrá ser renovada.</item>
   </plurals>
+  <plurals name="old_android_expiry_warning">
+    <item quantity="one">Android 4 ya no es soportado. Briar dejará de funcionar sobre %s (en %d días). Por favor, instala Briar en un dispositivo más nuevo y crea una cuenta nueva.</item>
+    <item quantity="other">Android 4 ya no es soportado. Briar dejará de funcionar sobre %s (en %d días). Por favor, instala Briar en un dispositivo más nuevo y crea una cuenta nueva.</item>
+  </plurals>
   <string name="expiry_date_reached">Este programa ha caducado.\n¡Gracias por probarlo!</string>
   <string name="download_briar">Para continuar usando Briar, por favor descarga la versión mas reciente.</string>
   <string name="create_new_account">Necesitarás crear una nueva cuenta, pero puedes usar el mismo nombre de usuario.</string>
   <string name="download_briar_button">Descargar la última versión.</string>
+  <string name="old_android_expiry_date_reached">Briar ya no funciona sobre Android 4.\nPor favor, instala Briar en un dispositivo más nuevo.</string>
+  <string name="old_android_delete_account">Puedes pulsar el botón de abajo para borrar tu cuenta de este dispositivo.</string>
+  <string name="delete_account_button">Borrar cuenta</string>
   <string name="startup_open_database">Descifrando la base de datos...</string>
   <string name="startup_migrate_database">Actualizando la base de datos...</string>
   <string name="startup_compact_database">Compactando base de datos...</string>
@@ -280,7 +287,7 @@
   <string name="duplicate_link_dialog_text_1">Ya tiene un contacto pendiente con este enlace: %s</string>
   <string name="duplicate_link_dialog_text_1_contact">Ya tienes un contacto con este enlace: %s</string>
   <!--This is a question asking whether two nicknames refer to the same person-->
-  <string name="duplicate_link_dialog_text_2">¿Son %s y %s la misma persona?</string>
+  <string name="duplicate_link_dialog_text_2">¿Son %1$s y %2$s la misma persona?</string>
   <!--This is a button for answering that two nicknames do indeed refer to the same person. This
 	string will be used in a dialog button, so if the translation of this string is longer than 20
 	characters, please use "Yes" instead, and use "No" for the "Different Person" button-->
@@ -289,7 +296,7 @@
 	will be used in a dialog button, so if the translation of this string longer than 20 characters,
 	please use "No" instead, and use "Yes" for the "Same Person" button-->
   <string name="different_person_button">Diferente Persona</string>
-  <string name="duplicate_link_dialog_text_3">%s y %s le envió el mismo enlace.\n\nUno de ellos puede estar tratando de descubrir quiénes son sus contactos.\n\nNo les diga que recibió el mismo enlace de otra persona.</string>
+  <string name="duplicate_link_dialog_text_3">%1$s y %2$s te enviaron el mismo enlace.\n\nUno de ellos puede estar tratando de descubrir quiénes son tus contactos.\n\nNo les digas que recibiste el mismo enlace de otra persona.</string>
   <string name="pending_contact_updated_toast">Contacto pendiente actualizado</string>
   <!--Introductions-->
   <string name="introduction_onboarding_title">Presenta a tus contactos</string>
@@ -568,6 +575,22 @@
   <string name="notify_sound_setting_disabled">Ninguno</string>
   <string name="choose_ringtone_title">Elegir tono de notificación</string>
   <string name="cannot_load_ringtone">No se puede cargar el tono de notificación</string>
+  <!--Mailbox-->
+  <string name="mailbox_settings_title">Buzón</string>
+  <string name="mailbox_setup_title">Configuración del buzón</string>
+  <string name="mailbox_setup_intro">Un Buzón les permite a tus contactos enviarte mensajes mientras estás fuera de línea. El Buzón recibirá tus mensajes y los almacenará hasta que estés en línea.\n
+		\nPuedes instalar la aplicación Buzón de Briar en un dispositivo sobrante. Mantenlo conectado al suministro eléctrico y el Wi-Fi, de manera que siempre esté en línea.</string>
+  <string name="mailbox_setup_download">Primero, instala la aplicación Buzón en otro dispositivo, buscando \"Buzón de Briar\" en Google Play o desde donde hayas descargado Briar.\n
+		\nLuego vincula tu Buzón con Briar escaneando el código QR mostrado por la aplicación Buzón.</string>
+  <string name="mailbox_setup_download_link">Compartir enlace de descarga</string>
+  <string name="mailbox_setup_button_scan">Escanear código QR de Buzón</string>
+  <string name="permission_camera_qr_denied_body">Has denegado el acceso a la cámara, pero para escanear un código QR se requiere el uso de la cámara.\n\nPor favor considera conceder el acceso.</string>
+  <string name="mailbox_setup_connecting">Conectando...</string>
+  <string name="mailbox_setup_qr_code_wrong_title">Código QR erróneo</string>
+  <string name="mailbox_setup_qr_code_wrong_description">El código escaneado no es válido. Por favor abre la aplicación Buzón de Briar en tu dispositivo de buzón y escanea el código QR que presenta.</string>
+  <string name="tor_offline_title">Desconectado</string>
+  <string name="tor_offline_description">Asegúrate de que este dispositivo esté en línea y las conexiones a Internet estén permitidas.\n\nLuego, espera a que el ícono de un globo en las configuraciones de conexión se torne verde.</string>
+  <string name="tor_offline_button_check">Comprobar configuración de conexión</string>
   <!--Conversation Settings-->
   <string name="disappearing_messages_title">Mensajes con caducidad</string>
   <string name="disappearing_messages_explanation_long">Activar este ajuste hará que los nuevos

briar-android/src/main/res/values-fa/strings.xml

@@ -54,12 +54,19 @@
     <item quantity="one">این یک نسخه آزمایشی از Briar (برایر) می باشد. حساب کاربری شما در %d روز آینده به پایان می رسد و امکان تمدید آن وجود نخواهد داشت.</item>
     <item quantity="other">این یک نسخه آزمایشی از Briar (برایر) می باشد. حساب کاربری شما در %d روز آینده به پایان می رسد و امکان تمدید آن وجود نخواهد داشت.</item>
   </plurals>
+  <plurals name="old_android_expiry_warning">
+    <item quantity="one">اندروید 4 دیگر پشتیبانی نمی‌شود. Briar (در عرض %d روز) کار بر روی %s را متوقف خواهد کرد. لطفا Briar را در دستگاه جدیدتر نصب کنید و یک حساب کاربری جدید ایجاد کنید.</item>
+    <item quantity="other">اندروید 4 دیگر پشتیبانی نمی‌شود. Briar (در عرض %d روز) کار بر روی %s را متوقف خواهد کرد. لطفا Briar را در دستگاه جدیدتر نصب کنید و یک حساب کاربری جدید ایجاد کنید.</item>
+  </plurals>
   <string name="expiry_date_reached">این نرم افزار منقضی شده است.
 
 بابت تست از شما سپاسگزاریم.</string>
   <string name="download_briar">برای ادامه استفاده از Briar، لطفا آخرین نسخه را دانلود کنید.</string>
   <string name="create_new_account">لازم است تا یک حساب کاربری جدید ایجاد کنید، ولی می توانید از همان نام مستعار استفاده کنید.</string>
   <string name="download_briar_button">دانلود آخرین نسخه</string>
+  <string name="old_android_expiry_date_reached">Briar دیگر روی اندروید 4 اجرا نمی‌شود.\nلطفا Briar را روی دستگاه جدیدتر نصب کنید. </string>
+  <string name="old_android_delete_account">برای حذف حساب کاربری خود از این دستگاه می‌توانید روی دکمه زیر ضربه بزنید.</string>
+  <string name="delete_account_button">حذف حساب کاربری</string>
   <string name="startup_open_database">در حال رمزگشایی سیستم ...</string>
   <string name="startup_migrate_database">در حال ارتقا سیستم ...</string>
   <string name="startup_compact_database">درحال فشرده‌ سازی پایگاه داده...</string>
@@ -294,7 +301,7 @@
   <string name="duplicate_link_dialog_text_1">شما هم اکنون یک مخاطب معلق با این پیوند دارید: %s</string>
   <string name="duplicate_link_dialog_text_1_contact">شما هم اکنون یک مخاطب با این پیوند دارید: %s</string>
   <!--This is a question asking whether two nicknames refer to the same person-->
-  <string name="duplicate_link_dialog_text_2">آیا %s و %s یک شخص می باشند؟</string>
+  <string name="duplicate_link_dialog_text_2">آیا %1$s و %2$s یک شخص هستند؟</string>
   <!--This is a button for answering that two nicknames do indeed refer to the same person. This
 	string will be used in a dialog button, so if the translation of this string is longer than 20
 	characters, please use "Yes" instead, and use "No" for the "Different Person" button-->
@@ -303,11 +310,7 @@
 	will be used in a dialog button, so if the translation of this string longer than 20 characters,
 	please use "No" instead, and use "Yes" for the "Same Person" button-->
   <string name="different_person_button">شخص متفاوت</string>
-  <string name="duplicate_link_dialog_text_3">%s و %s پیوند یکسانی را به شما ارسال کردند.
-
-یکی از آن ها ممکن است سعی در شناسایی مخاطبان شما داشته باشد.
-
-به آن ها نگویید که همان لینک را از یک شخص دیگر دریافت کرده اید.</string>
+  <string name="duplicate_link_dialog_text_3">%1$s و %2$s یک پیوند یکسان را به شما ارسال کردند.\n\nشاید یکی از آن‌ها قصد شناسایی مخاطبین شما را دارد.\n\nبه آن‌ها نگویید که همان لینک را از فرد دیگری نیز دریافت کرده‌اید.</string>
   <string name="pending_contact_updated_toast">مخاطب معلق به روز رسانی شد</string>
   <!--Introductions-->
   <string name="introduction_onboarding_title">معرفی مخاطبان</string>
@@ -608,6 +611,22 @@
   <string name="notify_sound_setting_disabled">هیچکدام</string>
   <string name="choose_ringtone_title">انتخاب رینگتون</string>
   <string name="cannot_load_ringtone">ناتوانی در بارگذاری رینگتون</string>
+  <!--Mailbox-->
+  <string name="mailbox_settings_title">Mailbox</string>
+  <string name="mailbox_setup_title">راه‌اندازی Mailbox</string>
+  <string name="mailbox_setup_intro">Mailbox به مخاطبین شما امکان می‌دهد در زمانی که آفلاین هستید، برای شما پیام ارسال کنند. Mailbox پیام‌های شما را دریافت می‌کند و آن‌ها را تا زمانی که آنلاین شوید نگهداری می‌کند.\n
+		شما می‌توانید برنامه Briar Mailbox را روی دستگاه دیگری نصب کنید. آن را به برق و Wi-Fi متصل نگه دارید تا همیشه آنلاین باشد. </string>
+  <string name="mailbox_setup_download">ابتدا، با جستجوی «Briar Mailbox» در Google Play یا هر جایی که Briar را دانلود کرده‌اید، برنامه Mailbox را روی دستگاه دیگری نصب کنید.\n
+		\nسپس با اسکن کد QR نمایش داده شده توسط برنامه Mailbox، صندوق پستی خود را با Briar پیوند دهید. </string>
+  <string name="mailbox_setup_download_link">اشتراک لینک دانلود</string>
+  <string name="mailbox_setup_button_scan">اسکن کد QR Mailbox</string>
+  <string name="permission_camera_qr_denied_body">شما دسترسی به دوربین را رد کرده‌اید، اما اسکن کد QR مستلزم استفاده از دوربین است.\n\nلطفا دسترسی به دوربین را بدهید.</string>
+  <string name="mailbox_setup_connecting">در حال اتصال...</string>
+  <string name="mailbox_setup_qr_code_wrong_title">کد QR اشتباه است</string>
+  <string name="mailbox_setup_qr_code_wrong_description">کد اسکن شده نامعتبر است. لطفا برنامه Briar Mailbox را در دستگاه صندوق پستی خود باز کنید و کد QR ارائه شده را اسکن کنید.</string>
+  <string name="tor_offline_title">آفلاین</string>
+  <string name="tor_offline_description">مطمئن شوید که این دستگاه آنلاین است و اجازه اتصال به اینترنت را دارد.\n\nسپس منتظر بمانید تا نماد کره زمین در تنظیمات اتصال سبز شود.</string>
+  <string name="tor_offline_button_check">تنظیمات اتصال را بررسی کنید</string>
   <!--Conversation Settings-->
   <string name="disappearing_messages_title">پیام‌های ناپدید شونده</string>
   <string name="disappearing_messages_explanation_long">روشن کردن این تنظیمات موجب خواهد شد تا پیام‌های جدید

briar-android/src/main/res/values-fr/strings.xml

@@ -5,7 +5,7 @@
   <string name="setup_name_explanation">Votre pseudonyme sera affiché à côté de tout contenu que vous publierez. Vous pourrez le modifier après avoir créé votre compte.</string>
   <string name="setup_next">Suivant</string>
   <string name="setup_password_intro">Choisir un mot de passe</string>
-  <string name="setup_password_explanation">Votre compte Briar est enregistré chiffré sur votre appareil et non dans le nuage. Si vous désinstallez Briar ou oubliez votre mot de passe, il n’existe aucune façon de récupérer votre compte.\n\nChoisissez un mot de passe long qui sera difficile à deviner, par exemple quatre mots au hasard ou dix lettres, chiffres et symboles au hasard.</string>
+  <string name="setup_password_explanation">Votre compte Briar est enregistré chiffré sur votre appareil et non dans le nuage. Si vous oubliez votre mot de passe ou désinstallez Briar, votre compte ne peut pas être récupéré.\n\nChoisissez un mot de passe long qui sera difficile à deviner, par exemple quatre mots au hasard ou dix lettres, chiffres et symboles au hasard.</string>
   <string name="setup_doze_title">Connexions d’arrière-plan</string>
   <string name="setup_doze_intro">Pour recevoir des messages, Briar a besoin de rester connectée en arrière-plan.</string>
   <string name="setup_doze_explanation">Pour recevoir des messages, Briar a besoin de rester connectée en arrière-plan. Veuillez désactiver les optimisations de la batterie afin que Briar puisse rester connectée.</string>
@@ -45,15 +45,16 @@
   <string name="startup_failed_db_error">Briar n’a pas pu ouvrir la base de données qui comprend votre compte, vos contacts et messages.\n\nVeuillez mettre l’appli à jour vers la version la plus récente et réessayer, ou créer un nouveau compte en choisissant « J’ai oublié mon mot de passe » à l’invite de mot de passe.</string>
   <string name="startup_failed_data_too_old_error">Votre compte a été créé avec une ancienne version de cette appli et ne peut pas être ouvert avec cette version.\n\nVous devez soit réinstaller l’ancienne version, soit créer un nouveau compte en choisissant « J’ai oublié mon mot de passe » à l’invite de mot de passe.</string>
   <string name="startup_failed_data_too_new_error">Votre compte a été créé avec une version plus récente de cette appli et ne peut être ouvert avec cette version.\n\nVeuillez mettre l’appli à jour vers la version la plus récente et réessayer.</string>
-  <string name="startup_failed_service_error">Briar n\'a pas pu lancer un composant essentiel.\n\nVeuillez mettre l’appli à jour vers la version la plus récente et réessayer.</string>
+  <string name="startup_failed_service_error">Briar n’a pas pu lancer un composant essentiel.\n\nVeuillez mettre l’appli à jour vers la version la plus récente et réessayer.</string>
   <plurals name="expiry_warning">
-    <item quantity="one">Ceci est une version de test de Briar. Votre compte arrivera à expiration dans %d jour et ne peut pas être renouvelé.</item>
-    <item quantity="other">Ceci est une version de test de Briar. Votre compte arrivera à expiration dans %d jours et ne pourra pas être renouvelé.</item>
+    <item quantity="one">Ceci est une version d’essai de Briar. Votre compte arrivera à expiration dans %d jour et ne peut pas être renouvelé.</item>
+    <item quantity="other">Ceci est une version d’essai de Briar. Votre compte arrivera à expiration dans %d jours et ne pourra pas être renouvelé.</item>
   </plurals>
   <string name="expiry_date_reached">Ce logiciel est arrivé à expiration.\nMerci de l’avoir testé !</string>
   <string name="download_briar">Pour continuer à utiliser Briar, veuillez télécharger la dernière version.</string>
   <string name="create_new_account">Vous devrez créer un nouveau compte, mais vous pouvez utiliser le même pseudonyme.</string>
   <string name="download_briar_button">Télécharger la dernière version</string>
+  <string name="delete_account_button">Supprimer le compte</string>
   <string name="startup_open_database">Déchiffrement de la base de données…</string>
   <string name="startup_migrate_database">Mise à niveau de la base de données…</string>
   <string name="startup_compact_database">Compactage de la base de données…</string>
@@ -233,7 +234,7 @@
   <string name="connecting_to_device">Connexion à l’appareil\u2026</string>
   <string name="authenticating_with_device">Autentification avec l’appareil\u2026</string>
   <string name="connection_error_title">Impossible de se connecter à votre contact</string>
-  <string name="connection_error_feedback">Si le problème persiste, veuillez nous <a href="feedback">envoyer une rétroaction</a> pour nous aider à améliorer l\'appli.</string>
+  <string name="connection_error_feedback">Si le problème persiste, veuillez nous <a href="feedback">envoyer une rétroaction</a> pour nous aider à améliorer l’appli.</string>
   <!--Adding Contacts Remotely-->
   <string name="add_contact_remotely_title_case">Ajouter un contact éloigné</string>
   <string name="add_contact_nearby_title">Ajouter un contact à proximité</string>
@@ -280,7 +281,6 @@
   <string name="duplicate_link_dialog_text_1">Vous avez déjà un contact en attente avec ce lien : %s</string>
   <string name="duplicate_link_dialog_text_1_contact">Vous avez déjà un contact avec ce lien : %s</string>
   <!--This is a question asking whether two nicknames refer to the same person-->
-  <string name="duplicate_link_dialog_text_2">%s et %s sont-elles la même personne ?</string>
   <!--This is a button for answering that two nicknames do indeed refer to the same person. This
 	string will be used in a dialog button, so if the translation of this string is longer than 20
 	characters, please use "Yes" instead, and use "No" for the "Different Person" button-->
@@ -289,7 +289,6 @@
 	will be used in a dialog button, so if the translation of this string longer than 20 characters,
 	please use "No" instead, and use "Yes" for the "Same Person" button-->
   <string name="different_person_button">Une personne différente</string>
-  <string name="duplicate_link_dialog_text_3">%s et %s vous ont envoyé le même lien.\n\nL\'une d’elle pourrait tenter de découvrir qui sont vos contacts.\n\nNe lui dites pas que vous avez reçu le même lien de quelqu’un d’autre.</string>
   <string name="pending_contact_updated_toast">Le contact en attente a été mis à jour</string>
   <!--Introductions-->
   <string name="introduction_onboarding_title">Présenter vos contacts</string>
@@ -338,7 +337,7 @@
   <string name="groups_create_group_button">Créer un groupe</string>
   <string name="groups_create_group_invitation_button">Envoyer une invitation</string>
   <string name="groups_create_group_hint">Choisissez un nom pour votre groupe privé</string>
-  <string name="groups_invitation_sent">L’invitation de groupe a été envoyée</string>
+  <string name="groups_invitation_sent">L’invitation au groupe a été envoyée</string>
   <string name="groups_member_list">Liste des participants</string>
   <string name="groups_invite_members">Inviter des participants</string>
   <string name="groups_member_created_you">Vous avez créé le groupe</string>
@@ -355,20 +354,20 @@
   <string name="groups_dissolved_dialog_title">Le groupe a été dissous</string>
   <string name="groups_dissolved_dialog_message">Le créateur de ce groupe l’a dissous.\n\nVous ne pouvez plus écrire de messages au groupe et ne recevrez peut-être pas tous ceux qui y ont été publiés.</string>
   <!--Private Group Invitations-->
-  <string name="groups_invitations_title">Invitations de groupe</string>
+  <string name="groups_invitations_title">Invitations au groupe</string>
   <string name="groups_invitations_invitation_sent">Vous avez invité %1$s à se joindre au groupe « %2$s ».</string>
   <string name="groups_invitations_invitation_received">%1$s vous a invité à vous joindre au groupe « %2$s ».</string>
   <string name="groups_invitations_joined">S’est joint au groupe</string>
-  <string name="groups_invitations_declined">L’invitation de groupe a été refusée</string>
+  <string name="groups_invitations_declined">L’invitation au groupe a été refusée</string>
   <plurals name="groups_invitations_open">
-    <item quantity="one">%d invitation de groupe en attente</item>
-    <item quantity="other">%d invitations de groupe en attente</item>
+    <item quantity="one">%d invitation au groupe en attente</item>
+    <item quantity="other">%d invitations au groupe en attente</item>
   </plurals>
-  <string name="groups_invitations_response_accepted_sent">Vous avez accepté l’invitation de groupe de %s.</string>
-  <string name="groups_invitations_response_declined_sent">Vous avez refusé l’invitation de groupe de %s.</string>
+  <string name="groups_invitations_response_accepted_sent">Vous avez accepté l’invitation au groupe de %s.</string>
+  <string name="groups_invitations_response_declined_sent">Vous avez refusé l’invitation au groupe de %s.</string>
   <string name="groups_invitations_response_declined_auto">L’invitation au groupe provenant de %s a été refusée automatiquement.</string>
-  <string name="groups_invitations_response_accepted_received">%s a accepté l’invitation de groupe.</string>
-  <string name="groups_invitations_response_declined_received">%s a refusé l’invitation de groupe.</string>
+  <string name="groups_invitations_response_accepted_received">%s a accepté l’invitation au groupe.</string>
+  <string name="groups_invitations_response_declined_received">%s a refusé l’invitation au groupe.</string>
   <string name="sharing_status_groups">Seul le créateur peut inviter de nouveaux participants. Voici la liste des membres actuels du groupe.</string>
   <!--Private Groups Revealing Contacts-->
   <string name="groups_reveal_contacts">Dévoiler les contacts</string>
@@ -568,6 +567,9 @@
   <string name="notify_sound_setting_disabled">Aucun</string>
   <string name="choose_ringtone_title">Choisir une sonnerie</string>
   <string name="cannot_load_ringtone">Impossible de charger la sonnerie</string>
+  <!--Mailbox-->
+  <string name="mailbox_setup_connecting">Connexion…</string>
+  <string name="tor_offline_title">Hors ligne</string>
   <!--Conversation Settings-->
   <string name="disappearing_messages_title">Messages éphémères</string>
   <string name="disappearing_messages_explanation_long">L’activation de ce paramètre fera disparaître
@@ -676,6 +678,7 @@ copies des messages que vous envoyez.
   <string name="website_troubleshooting_title">Dépannage</string>
   <!--error handling-->
   <!--Transfer Data via Removable Drives-->
+  <string name="removable_drive_menu_title">Se connecter par un lecteur amovible</string>
   <string name="removable_drive_success_receive_title">L’importation est réussie</string>
   <!--Screenshots-->
   <!--This is a name to be used in screenshots. Feel free to change it to a local name.-->

briar-android/src/main/res/values-gl/strings.xml

@@ -42,6 +42,7 @@
   <string name="download_briar">Para seguir utilizando Briar, descarga por favor a última versión.</string>
   <string name="create_new_account">Precisas crear unha nova conta, pero podes utilizar o mesmo alcume.</string>
   <string name="download_briar_button">Descargar Última Versión</string>
+  <string name="delete_account_button">Eliminar conta</string>
   <string name="startup_open_database">Descifrando a Base de datos...</string>
   <string name="startup_migrate_database">Actualizando a Base de datos...</string>
   <string name="startup_compact_database">Compactando a base de datos...</string>
@@ -268,7 +269,6 @@
   <string name="duplicate_link_dialog_text_1">Xa tes un contacto pendente con esta ligazón: %s</string>
   <string name="duplicate_link_dialog_text_1_contact">Xa tes un contacto con esta ligazón: %s</string>
   <!--This is a question asking whether two nicknames refer to the same person-->
-  <string name="duplicate_link_dialog_text_2">Son %s e %s a mesma persoa?</string>
   <!--This is a button for answering that two nicknames do indeed refer to the same person. This
 	string will be used in a dialog button, so if the translation of this string is longer than 20
 	characters, please use "Yes" instead, and use "No" for the "Different Person" button-->
@@ -277,7 +277,6 @@
 	will be used in a dialog button, so if the translation of this string longer than 20 characters,
 	please use "No" instead, and use "Yes" for the "Same Person" button-->
   <string name="different_person_button">Diferente Persoa</string>
-  <string name="duplicate_link_dialog_text_3">%s e %s enviáronche a mesma ligazón.\n\nUnha delas podería estar a intentar descubrir os teus contactos.\n\nNon lles digas que recibiches a mesma ligazón de alguén máis.</string>
   <string name="pending_contact_updated_toast">Contacto pendente actualizado</string>
   <!--Introductions-->
   <string name="introduction_onboarding_title">Presenta aos seus contactos</string>
@@ -551,6 +550,9 @@
   <string name="notify_sound_setting_disabled">Ningún</string>
   <string name="choose_ringtone_title">Escolle ton</string>
   <string name="cannot_load_ringtone">Non se cargou o ton</string>
+  <!--Mailbox-->
+  <string name="mailbox_setup_connecting">Conectando...</string>
+  <string name="tor_offline_title">Desconectado</string>
   <!--Conversation Settings-->
   <string name="disappearing_messages_title">Mensaxes efémeras</string>
   <string name="disappearing_messages_explanation_long">Ao activar esta función farás que as novas
@@ -643,6 +645,7 @@
   <string name="website_troubleshooting_title">Solución de problemas</string>
   <!--error handling-->
   <!--Transfer Data via Removable Drives-->
+  <string name="removable_drive_menu_title">Conectar vía Disco Extraíble</string>
   <string name="removable_drive_success_receive_title">Importación exitosa</string>
   <!--Screenshots-->
   <!--This is a name to be used in screenshots. Feel free to change it to a local name.-->