Use /dev/urandom for tests.

.idea/runConfigurations/All_tests.xml

@@ -22,8 +22,8 @@
       <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-api" run_configuration_type="AndroidJUnit" />
       <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-core" run_configuration_type="AndroidJUnit" />
       <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-android" run_configuration_type="AndroidJUnit" />
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-java" run_configuration_type="AndroidJUnit" />
+      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-j2se" run_configuration_type="AndroidJUnit" />
       <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in briar-core" run_configuration_type="AndroidJUnit" />
     </method>
   </configuration>
-</component>
+</component>

.idea/runConfigurations/All_tests_in_bramble_j2se.xml

@@ -1,7 +1,7 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in bramble-java" type="AndroidJUnit" factoryName="Android JUnit">
+  <configuration default="false" name="All tests in bramble-j2se" type="AndroidJUnit" factoryName="Android JUnit">
     <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
-    <module name="bramble-java" />
+    <module name="bramble-j2se" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
     <option name="ALTERNATIVE_JRE_PATH" />
     <option name="PACKAGE_NAME" value="" />
@@ -10,7 +10,7 @@
     <option name="TEST_OBJECT" value="package" />
     <option name="VM_PARAMETERS" value="-ea -Djava.library.path=libs" />
     <option name="PARAMETERS" value="" />
-    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-java" />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-j2se" />
     <option name="ENV_VARIABLES" />
     <option name="PASS_PARENT_ENVS" value="true" />
     <option name="TEST_SEARCH_SCOPE">

bramble-android/build.gradle

@@ -9,8 +9,8 @@ android {
 	defaultConfig {
 		minSdkVersion 14
 		targetSdkVersion 26
-		versionCode 10102
-		versionName "1.1.2"
+		versionCode 10013
+		versionName "1.0.13"
 		consumerProguardFiles 'proguard-rules.txt'
 
 		testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -41,6 +41,12 @@ dependencies {
 	testImplementation "org.jmock:jmock-legacy:2.8.2"
 	testImplementation "org.hamcrest:hamcrest-library:1.3"
 	testImplementation "org.hamcrest:hamcrest-core:1.3"
+
+	androidTestImplementation project(path: ':bramble-api', configuration: 'testOutput')
+	androidTestImplementation project(path: ':bramble-core', configuration: 'testOutput')
+	androidTestImplementation 'com.android.support.test:runner:1.0.2'
+	androidTestAnnotationProcessor 'com.google.dagger:dagger-compiler:2.0.2'
+	androidTestCompileOnly 'javax.annotation:jsr250-api:1.0'
 }
 
 project.afterEvaluate {
@@ -49,3 +55,8 @@ project.afterEvaluate {
 		into 'src/main/res/raw'
 	}
 }
+
+tasks.withType(Test) {
+	// Use entropy-gathering device specified on command line, if any
+	systemProperty 'java.security.egd', System.getProperty('java.security.egd')
+}

bramble-android/src/androidTest/java/org/briarproject/bramble/plugin/tor/BridgeTest.java

@@ -1,5 +1,8 @@
 package org.briarproject.bramble.plugin.tor;
 
+import android.content.Context;
+import android.support.test.runner.AndroidJUnit4;
+
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.network.NetworkManager;
 import org.briarproject.bramble.api.plugin.BackoffFactory;
@@ -7,46 +10,35 @@ import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
 import org.briarproject.bramble.api.system.ResourceProvider;
-import org.briarproject.bramble.test.BrambleJavaIntegrationTestComponent;
+import org.briarproject.bramble.test.BrambleAndroidIntegrationTestComponent;
 import org.briarproject.bramble.test.BrambleTestCase;
-import org.briarproject.bramble.test.DaggerBrambleJavaIntegrationTestComponent;
-import org.briarproject.bramble.util.OsUtils;
-import org.junit.After;
+import org.briarproject.bramble.test.DaggerBrambleAndroidIntegrationTestComponent;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.junit.runners.Parameterized;
-import org.junit.runners.Parameterized.Parameters;
 
-import java.io.File;
 import java.util.List;
 import java.util.concurrent.Executor;
 import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledThreadPoolExecutor;
 import java.util.logging.Logger;
 
 import javax.inject.Inject;
 import javax.net.SocketFactory;
 
+import static android.support.test.InstrumentationRegistry.getTargetContext;
 import static java.util.Collections.singletonList;
 import static java.util.concurrent.TimeUnit.SECONDS;
-import static org.briarproject.bramble.test.TestUtils.deleteTestDirectory;
-import static org.briarproject.bramble.test.TestUtils.getTestDirectory;
-import static org.briarproject.bramble.test.TestUtils.isOptionalTestEnabled;
 import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
-import static org.junit.Assume.assumeTrue;
 
-@RunWith(Parameterized.class)
+
+@RunWith(AndroidJUnit4.class)
 public class BridgeTest extends BrambleTestCase {
 
-	@Parameters
-	public static Iterable<String> data() {
-		BrambleJavaIntegrationTestComponent component =
-				DaggerBrambleJavaIntegrationTestComponent.builder().build();
-		return component.getCircumventionProvider().getBridges();
-	}
-
-	private final static long TIMEOUT = SECONDS.toMillis(30);
+	private final static long TIMEOUT = SECONDS.toMillis(23);
 
 	private final static Logger LOG =
 			Logger.getLogger(BridgeTest.class.getName());
@@ -64,31 +56,26 @@ public class BridgeTest extends BrambleTestCase {
 	@Inject
 	Clock clock;
 
-	private final File torDir = getTestDirectory();
-	private final String bridge;
+	private final Context appContext =
+			getTargetContext().getApplicationContext();
 
-	private LinuxTorPluginFactory factory;
+	private List<String> bridges;
+	private AndroidTorPluginFactory factory;
 
-	public BridgeTest(String bridge) {
-		this.bridge = bridge;
-	}
+	private volatile String currentBridge = null;
 
 	@Before
 	public void setUp() {
-		// Skip this test unless it's explicitly enabled in the environment
-		assumeTrue(isOptionalTestEnabled(BridgeTest.class));
-
-		// TODO: Remove this assumption when the plugin supports other platforms
-		assumeTrue(OsUtils.isLinux());
-
-		BrambleJavaIntegrationTestComponent component =
-				DaggerBrambleJavaIntegrationTestComponent.builder().build();
+		BrambleAndroidIntegrationTestComponent component =
+				DaggerBrambleAndroidIntegrationTestComponent.builder().build();
 		component.inject(this);
 
 		Executor ioExecutor = Executors.newCachedThreadPool();
+		ScheduledExecutorService scheduler = new ScheduledThreadPoolExecutor(1);
 		LocationUtils locationUtils = () -> "US";
 		SocketFactory torSocketFactory = SocketFactory.getDefault();
 
+		bridges = circumventionProvider.getBridges();
 		CircumventionProvider bridgeProvider = new CircumventionProvider() {
 			@Override
 			public boolean isTorProbablyBlocked(String countryCode) {
@@ -102,26 +89,28 @@ public class BridgeTest extends BrambleTestCase {
 
 			@Override
 			public List<String> getBridges() {
-				return singletonList(bridge);
+				return singletonList(currentBridge);
 			}
 		};
-		factory = new LinuxTorPluginFactory(ioExecutor, networkManager,
-				locationUtils, eventBus, torSocketFactory, backoffFactory,
-				resourceProvider, bridgeProvider, clock, torDir);
-	}
-
-	@After
-	public void tearDown() {
-		deleteTestDirectory(torDir);
+		factory = new AndroidTorPluginFactory(ioExecutor, scheduler, appContext,
+				networkManager, locationUtils, eventBus, torSocketFactory,
+				backoffFactory, resourceProvider, bridgeProvider, clock);
 	}
 
 	@Test
 	public void testBridges() throws Exception {
+		assertTrue(bridges.size() > 0);
+
+		for (String bridge : bridges) testBridge(bridge);
+	}
+
+	private void testBridge(String bridge) throws Exception {
 		DuplexPlugin duplexPlugin =
 				factory.createPlugin(new TorPluginCallBack());
 		assertNotNull(duplexPlugin);
-		LinuxTorPlugin plugin = (LinuxTorPlugin) duplexPlugin;
+		AndroidTorPlugin plugin = (AndroidTorPlugin) duplexPlugin;
 
+		currentBridge = bridge;
 		LOG.warning("Testing " + bridge);
 		try {
 			plugin.start();

bramble-android/src/androidTest/java/org/briarproject/bramble/test/ApplicationModule.java

@@ -0,0 +1,20 @@
+package org.briarproject.bramble.test;
+
+import android.app.Application;
+
+import javax.inject.Singleton;
+
+import dagger.Module;
+import dagger.Provides;
+
+import static android.support.test.InstrumentationRegistry.getTargetContext;
+
+@Module
+class ApplicationModule {
+
+	@Provides
+	@Singleton
+	Application provideApplication() {
+		return (Application) getTargetContext().getApplicationContext();
+	}
+}

bramble-android/src/androidTest/java/org/briarproject/bramble/test/BrambleAndroidIntegrationTestComponent.java

@@ -1,10 +1,9 @@
 package org.briarproject.bramble.test;
 
-import org.briarproject.bramble.BrambleJavaModule;
+import org.briarproject.bramble.BrambleAndroidModule;
 import org.briarproject.bramble.event.EventModule;
 import org.briarproject.bramble.plugin.PluginModule;
 import org.briarproject.bramble.plugin.tor.BridgeTest;
-import org.briarproject.bramble.plugin.tor.CircumventionProvider;
 import org.briarproject.bramble.system.SystemModule;
 
 import javax.inject.Singleton;
@@ -13,15 +12,15 @@ import dagger.Component;
 
 @Singleton
 @Component(modules = {
-		BrambleJavaModule.class,
+		BrambleAndroidModule.class,
 		TestLifecycleModule.class,
+		ApplicationModule.class,
 		PluginModule.class,  // needed for BackoffFactory
 		EventModule.class,
 		SystemModule.class,
 })
-public interface BrambleJavaIntegrationTestComponent {
+public interface BrambleAndroidIntegrationTestComponent {
 
 	void inject(BridgeTest init);
 
-	CircumventionProvider getCircumventionProvider();
 }

bramble-android/src/main/java/org/briarproject/bramble/system/AndroidResourceProvider.java

@@ -22,11 +22,9 @@ class AndroidResourceProvider implements ResourceProvider {
 	}
 
 	@Override
-	public InputStream getResourceInputStream(String name, String extension) {
+	public InputStream getResourceInputStream(String name) {
 		Resources res = appContext.getResources();
-		// extension is ignored on Android, resources are retrieved without it
-		int resId =
-				res.getIdentifier(name, "raw", appContext.getPackageName());
+		int resId = res.getIdentifier(name, "raw", appContext.getPackageName());
 		return res.openRawResource(resId);
 	}
 }

bramble-android/src/main/res/raw/bridges

@@ -2,7 +2,7 @@ Bridge 131.252.210.150:8081 0E858AC201BF0F3FA3C462F64844CBFFC7297A42
 Bridge 67.205.189.122:8443 12D64D5D44E20169585E7378580C0D33A872AD98
 Bridge 45.32.148.146:8443 0CE016FB2462D8BF179AE71F7D702D09DEAC3F1D
 Bridge 148.251.90.59:7510 019F727CA6DCA6CA5C90B55E477B7D87981E75BC
+Bridge 195.91.239.8:9001 BA83F62551545655BBEBBFF353A45438D73FD45A
+Bridge 185.165.184.217:6429 64CC94BEC51254E4409AD059192833854CCB95F0
 Bridge 45.55.1.74:8443 6F18FEFBB0CAECD5ABA755312FCCB34FC11A7AB8
-Bridge 85.229.131.78:444 50E433CCC5FEC11CC34CB4D92033561E065EA106
-Bridge 178.62.62.193:8443 391B1F9B6A28A1C5FAE1872283985F975E5DB029
-Bridge 45.76.29.92:8443 ECF1DD51A46FDEF2C50CED992EEEAE8DED18DA0C
+Bridge 95.85.40.163:9001 40057BE9CF76B6C5BDBE713753468BE0A990DE9C

bramble-android/witness.gradle

@@ -1,6 +1,9 @@
 dependencyVerification {
     verify = [
         'cglib:cglib:3.2.0:cglib-3.2.0.jar:adb13bab79712ad6bdf1bd59f2a3918018a8016e722e8a357065afb9e6690861',
+        'com.android.support.test:monitor:1.0.2:monitor-1.0.2.aar:38ef4fa98a32dc55550ff49bb36a583e178b3a9b830fcb8dcc27bfc4254bc2bc',
+        'com.android.support.test:runner:1.0.2:runner-1.0.2.aar:f04b9ae342975ba1cb3e4a06e13426e3e6b8a73faa45acba604493d83c9a4f00',
+        'com.android.support:support-annotations:27.1.1:support-annotations-27.1.1.jar:3365960206c3d2b09e845f555e7f88f8effc8d2f00b369e66c4be384029299cf',
         'com.android.tools.analytics-library:protos:26.1.3:protos-26.1.3.jar:818c9f256f141d9dafec03a1aa2b94d240b2c140acfd7ee31a8b3e6c2b9479e3',
         'com.android.tools.analytics-library:shared:26.1.3:shared-26.1.3.jar:7110706c7ada96c8b6f5ca80c478291bc7899d46277de2c48527e045442401a3',
         'com.android.tools.analytics-library:tracker:26.1.3:tracker-26.1.3.jar:4155424bf2ce4872da83332579a1707252bc66cbd77c5144fdc4483d0f2e1418',

bramble-api/build.gradle

@@ -31,3 +31,8 @@ task jarTest(type: Jar, dependsOn: testClasses) {
 artifacts {
 	testOutput jarTest
 }
+
+tasks.withType(Test) {
+	// Use entropy-gathering device specified on command line, if any
+	systemProperty 'java.security.egd', System.getProperty('java.security.egd')
+}

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

@@ -1,10 +0,0 @@
-package org.briarproject.bramble.api;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-@NotNullByDefault
-public interface Nameable {
-
-	String getName();
-
-}

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

@@ -0,0 +1,9 @@
+package org.briarproject.bramble.api;
+
+import java.io.IOException;
+
+/**
+ * An exception that indicates an unrecoverable version mismatch.
+ */
+public class UnsupportedVersionException extends IOException {
+}

bramble-api/src/main/java/org/briarproject/bramble/api/client/BdfMessageValidator.java

@@ -16,6 +16,7 @@ import java.util.logging.Logger;
 
 import javax.annotation.concurrent.Immutable;
 
+import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 import static org.briarproject.bramble.api.transport.TransportConstants.MAX_CLOCK_DIFFERENCE;
 
 @Immutable
@@ -48,13 +49,14 @@ public abstract class BdfMessageValidator implements MessageValidator {
 			throw new InvalidMessageException(
 					"Timestamp is too far in the future");
 		}
-		byte[] body = m.getBody();
-		if (body.length == 0) {
+		byte[] raw = m.getRaw();
+		if (raw.length <= MESSAGE_HEADER_LENGTH) {
 			throw new InvalidMessageException("Message is too short");
 		}
 		try {
-			BdfList bodyList = clientHelper.toList(body);
-			BdfMessageContext result = validateMessage(m, g, bodyList);
+			BdfList body = clientHelper.toList(raw, MESSAGE_HEADER_LENGTH,
+					raw.length - MESSAGE_HEADER_LENGTH);
+			BdfMessageContext result = validateMessage(m, g, body);
 			Metadata meta = metadataEncoder.encode(result.getDictionary());
 			return new MessageContext(meta, result.getDependencies());
 		} catch (FormatException e) {

bramble-api/src/main/java/org/briarproject/bramble/api/client/ClientHelper.java

@@ -16,6 +16,8 @@ import org.briarproject.bramble.api.sync.MessageId;
 import java.security.GeneralSecurityException;
 import java.util.Map;
 
+import javax.annotation.Nullable;
+
 @NotNullByDefault
 public interface ClientHelper {
 
@@ -30,12 +32,16 @@ public interface ClientHelper {
 
 	Message createMessageForStoringMetadata(GroupId g);
 
+	@Nullable
 	Message getMessage(MessageId m) throws DbException;
 
+	@Nullable
 	Message getMessage(Transaction txn, MessageId m) throws DbException;
 
+	@Nullable
 	BdfList getMessageAsList(MessageId m) throws DbException, FormatException;
 
+	@Nullable
 	BdfList getMessageAsList(Transaction txn, MessageId m) throws DbException,
 			FormatException;
 

bramble-api/src/main/java/org/briarproject/bramble/api/db/DatabaseComponent.java

@@ -151,13 +151,13 @@ public interface DatabaseComponent {
 			throws DbException;
 
 	/**
-	 * Returns a batch of messages for the given contact, with a total length
-	 * less than or equal to the given length, for transmission over a
+	 * Returns a batch of raw messages for the given contact, with a total
+	 * length less than or equal to the given length, for transmission over a
 	 * transport with the given maximum latency. Returns null if there are no
 	 * sendable messages that fit in the given length.
 	 */
 	@Nullable
-	Collection<Message> generateBatch(Transaction txn, ContactId c,
+	Collection<byte[]> generateBatch(Transaction txn, ContactId c,
 			int maxLength, int maxLatency) throws DbException;
 
 	/**
@@ -178,14 +178,14 @@ public interface DatabaseComponent {
 			throws DbException;
 
 	/**
-	 * Returns a batch of messages for the given contact, with a total length
-	 * less than or equal to the given length, for transmission over a
+	 * Returns a batch of raw messages for the given contact, with a total
+	 * length less than or equal to the given length, for transmission over a
 	 * transport with the given maximum latency. Only messages that have been
 	 * requested by the contact are returned. Returns null if there are no
 	 * sendable messages that fit in the given length.
 	 */
 	@Nullable
-	Collection<Message> generateRequestedBatch(Transaction txn, ContactId c,
+	Collection<byte[]> generateRequestedBatch(Transaction txn, ContactId c,
 			int maxLength, int maxLatency) throws DbException;
 
 	/**
@@ -263,15 +263,6 @@ public interface DatabaseComponent {
 	 */
 	Collection<LocalAuthor> getLocalAuthors(Transaction txn) throws DbException;
 
-	/**
-	 * Returns the message with the given ID.
-	 * <p/>
-	 * Read-only.
-	 *
-	 * @throws MessageDeletedException if the message has been deleted
-	 */
-	Message getMessage(Transaction txn, MessageId m) throws DbException;
-
 	/**
 	 * Returns the IDs of all delivered messages in the given group.
 	 * <p/>
@@ -306,6 +297,15 @@ public interface DatabaseComponent {
 	Collection<MessageId> getMessagesToShare(Transaction txn)
 			throws DbException;
 
+	/**
+	 * Returns the message with the given ID, in serialised form, or null if
+	 * the message has been deleted.
+	 * <p/>
+	 * Read-only.
+	 */
+	@Nullable
+	byte[] getRawMessage(Transaction txn, MessageId m) throws DbException;
+
 	/**
 	 * Returns the metadata for all delivered messages in the given group.
 	 * <p/>

bramble-api/src/main/java/org/briarproject/bramble/api/db/MessageDeletedException.java

@@ -1,9 +0,0 @@
-package org.briarproject.bramble.api.db;
-
-/**
- * Thrown when a message that has been deleted is requested from the database.
- * This exception may occur due to concurrent updates and does not indicate a
- * database error.
- */
-public class MessageDeletedException extends DbException {
-}

bramble-api/src/main/java/org/briarproject/bramble/api/identity/Author.java

@@ -1,6 +1,5 @@
 package org.briarproject.bramble.api.identity;
 
-import org.briarproject.bramble.api.Nameable;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.util.StringUtils;
 
@@ -14,7 +13,7 @@ import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_PUBLIC_K
  */
 @Immutable
 @NotNullByDefault
-public class Author implements Nameable {
+public class Author {
 
 	public enum Status {
 		NONE, ANONYMOUS, UNKNOWN, UNVERIFIED, VERIFIED, OURSELVES

bramble-api/src/main/java/org/briarproject/bramble/api/keyagreement/KeyAgreementConstants.java

@@ -3,13 +3,7 @@ package org.briarproject.bramble.api.keyagreement;
 public interface KeyAgreementConstants {
 
 	/**
-	 * The version of the BQP protocol used in beta releases. This version
-	 * number is reserved.
-	 */
-	byte BETA_PROTOCOL_VERSION = 89;
-
-	/**
-	 * The current version of the BQP protocol.
+	 * The current version of the BQP protocol. Version number 89 is reserved.
 	 */
 	byte PROTOCOL_VERSION = 4;
 

bramble-api/src/main/java/org/briarproject/bramble/api/keyagreement/UnsupportedVersionException.java

@@ -1,20 +0,0 @@
-package org.briarproject.bramble.api.keyagreement;
-
-import java.io.IOException;
-
-/**
- * Thrown when a QR code that has been scanned uses a protocol version that is
- * not supported.
- */
-public class UnsupportedVersionException extends IOException {
-
-	private final boolean tooOld;
-
-	public UnsupportedVersionException(boolean tooOld) {
-		this.tooOld = tooOld;
-	}
-
-	public boolean isTooOld() {
-		return tooOld;
-	}
-}

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/TorConstants.java

@@ -12,13 +12,12 @@ public interface TorConstants {
 	int CONNECT_TO_PROXY_TIMEOUT = 5000; // Milliseconds
 	int EXTRA_SOCKET_TIMEOUT = 30000; // Milliseconds
 
-	String PREF_TOR_NETWORK = "network2";
+	String PREF_TOR_NETWORK = "network";
 	String PREF_TOR_PORT = "port";
-	String PREF_TOR_MOBILE = "useMobileData";
+	String PREF_TOR_DISABLE_BLOCKED = "disableWhenBlocked";
 
-	int PREF_TOR_NETWORK_AUTOMATIC = 0;
-	int PREF_TOR_NETWORK_WITHOUT_BRIDGES = 1;
-	int PREF_TOR_NETWORK_WITH_BRIDGES = 2;
-	int PREF_TOR_NETWORK_NEVER = 3;
+	int PREF_TOR_NETWORK_NEVER = 0;
+	int PREF_TOR_NETWORK_WIFI = 1;
+	int PREF_TOR_NETWORK_ALWAYS = 2;
 
 }

bramble-api/src/main/java/org/briarproject/bramble/api/settings/SettingsManager.java

@@ -1,7 +1,6 @@
 package org.briarproject.bramble.api.settings;
 
 import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 @NotNullByDefault
@@ -12,11 +11,6 @@ public interface SettingsManager {
 	 */
 	Settings getSettings(String namespace) throws DbException;
 
-	/**
-	 * Returns all settings in the given namespace.
-	 */
-	Settings getSettings(Transaction txn, String namespace) throws DbException;
-
 	/**
 	 * Merges the given settings with any existing settings in the given
 	 * namespace.

bramble-api/src/main/java/org/briarproject/bramble/api/settings/event/SettingsUpdatedEvent.java

@@ -2,7 +2,6 @@ package org.briarproject.bramble.api.settings.event;
 
 import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.settings.Settings;
 
 import javax.annotation.concurrent.Immutable;
 
@@ -14,18 +13,12 @@ import javax.annotation.concurrent.Immutable;
 public class SettingsUpdatedEvent extends Event {
 
 	private final String namespace;
-	private final Settings settings;
 
-	public SettingsUpdatedEvent(String namespace, Settings settings) {
+	public SettingsUpdatedEvent(String namespace) {
 		this.namespace = namespace;
-		this.settings = settings;
 	}
 
 	public String getNamespace() {
 		return namespace;
 	}
-
-	public Settings getSettings() {
-		return settings;
-	}
 }

bramble-api/src/main/java/org/briarproject/bramble/api/sync/Message.java

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.sync;
 
-import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_BODY_LENGTH;
+import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_LENGTH;
 import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 
 public class Message {
@@ -13,15 +13,17 @@ public class Message {
 	private final MessageId id;
 	private final GroupId groupId;
 	private final long timestamp;
-	private final byte[] body;
+	private final byte[] raw;
 
-	public Message(MessageId id, GroupId groupId, long timestamp, byte[] body) {
-		if (body.length > MAX_MESSAGE_BODY_LENGTH)
+	public Message(MessageId id, GroupId groupId, long timestamp, byte[] raw) {
+		if (raw.length <= MESSAGE_HEADER_LENGTH)
+			throw new IllegalArgumentException();
+		if (raw.length > MAX_MESSAGE_LENGTH)
 			throw new IllegalArgumentException();
 		this.id = id;
 		this.groupId = groupId;
 		this.timestamp = timestamp;
-		this.body = body;
+		this.raw = raw;
 	}
 
 	/**
@@ -48,15 +50,15 @@ public class Message {
 	/**
 	 * Returns the length of the raw message in bytes.
 	 */
-	public int getRawLength() {
-		return MESSAGE_HEADER_LENGTH + body.length;
+	public int getLength() {
+		return raw.length;
 	}
 
 	/**
-	 * Returns the message body.
+	 * Returns the raw message.
 	 */
-	public byte[] getBody() {
-		return body;
+	public byte[] getRaw() {
+		return raw;
 	}
 
 	@Override

bramble-api/src/main/java/org/briarproject/bramble/api/sync/MessageFactory.java

@@ -9,5 +9,5 @@ public interface MessageFactory {
 
 	Message createMessage(byte[] raw);
 
-	byte[] getRawMessage(Message m);
+	Message createMessage(MessageId m, byte[] raw);
 }

bramble-api/src/main/java/org/briarproject/bramble/api/sync/SyncRecordWriter.java

@@ -9,7 +9,7 @@ public interface SyncRecordWriter {
 
 	void writeAck(Ack a) throws IOException;
 
-	void writeMessage(Message m) throws IOException;
+	void writeMessage(byte[] raw) throws IOException;
 
 	void writeOffer(Offer o) throws IOException;
 

bramble-api/src/main/java/org/briarproject/bramble/api/system/ResourceProvider.java

@@ -7,5 +7,5 @@ import java.io.InputStream;
 @NotNullByDefault
 public interface ResourceProvider {
 
-	InputStream getResourceInputStream(String name, String extension);
+	InputStream getResourceInputStream(String name);
 }

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

@@ -1,23 +0,0 @@
-package org.briarproject.bramble.test;
-
-import org.briarproject.bramble.api.system.Clock;
-
-public class ArrayClock implements Clock {
-
-	private final long[] times;
-	private int index = 0;
-
-	public ArrayClock(long... times) {
-		this.times = times;
-	}
-
-	@Override
-	public long currentTimeMillis() {
-		return times[index++];
-	}
-
-	@Override
-	public void sleep(long milliseconds) throws InterruptedException {
-		Thread.sleep(milliseconds);
-	}
-}

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

@@ -24,7 +24,6 @@ import java.util.Map;
 import java.util.Random;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import static java.util.Arrays.asList;
 import static org.briarproject.bramble.api.identity.Author.FORMAT_VERSION;
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_AUTHOR_NAME_LENGTH;
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_PUBLIC_KEY_LENGTH;
@@ -33,6 +32,7 @@ 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.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 import static org.briarproject.bramble.util.StringUtils.getRandomString;
 
 public class TestUtils {
@@ -40,7 +40,6 @@ public class TestUtils {
 	private static final AtomicInteger nextTestDir =
 			new AtomicInteger((int) (Math.random() * 1000 * 1000));
 	private static final Random random = new Random();
-	private static final long timestamp = System.currentTimeMillis();
 
 	public static File getTestDirectory() {
 		int name = nextTestDir.getAndIncrement();
@@ -102,8 +101,9 @@ public class TestUtils {
 		String name = getRandomString(nameLength);
 		byte[] publicKey = getRandomBytes(MAX_PUBLIC_KEY_LENGTH);
 		byte[] privateKey = getRandomBytes(MAX_PUBLIC_KEY_LENGTH);
+		long created = System.currentTimeMillis();
 		return new LocalAuthor(id, FORMAT_VERSION, name, publicKey, privateKey,
-				timestamp);
+				created);
 	}
 
 	public static Author getAuthor() {
@@ -131,13 +131,14 @@ public class TestUtils {
 
 	public static Message getMessage(GroupId groupId) {
 		int bodyLength = 1 + random.nextInt(MAX_MESSAGE_BODY_LENGTH);
-		return getMessage(groupId, bodyLength);
+		return getMessage(groupId, MESSAGE_HEADER_LENGTH + bodyLength);
 	}
 
-	public static Message getMessage(GroupId groupId, int bodyLength) {
+	public static Message getMessage(GroupId groupId, int rawLength) {
 		MessageId id = new MessageId(getRandomId());
-		byte[] body = getRandomBytes(bodyLength);
-		return new Message(id, groupId, timestamp, body);
+		byte[] raw = getRandomBytes(rawLength);
+		long timestamp = System.currentTimeMillis();
+		return new Message(id, groupId, timestamp, raw);
 	}
 
 	public static double getMedian(Collection<? extends Number> samples) {
@@ -173,10 +174,4 @@ public class TestUtils {
 			Collection<? extends Number> samples) {
 		return Math.sqrt(getVariance(samples));
 	}
-
-	public static boolean isOptionalTestEnabled(Class testClass) {
-		String optionalTests = System.getenv("OPTIONAL_TESTS");
-		return optionalTests != null &&
-				asList(optionalTests.split(",")).contains(testClass.getName());
-	}
 }

bramble-core/build.gradle

@@ -33,7 +33,7 @@ dependencies {
 	signature 'org.codehaus.mojo.signature:java16:1.1@signature'
 }
 
-// needed to make test output available to bramble-java
+// needed to make test output available to bramble-j2se
 configurations {
 	testOutput.extendsFrom(testCompile)
 }
@@ -44,3 +44,8 @@ task jarTest(type: Jar, dependsOn: testClasses) {
 artifacts {
 	testOutput jarTest
 }
+
+tasks.withType(Test) {
+	// Use entropy-gathering device specified on command line, if any
+	systemProperty 'java.security.egd', System.getProperty('java.security.egd')
+}

bramble-core/src/main/java/org/briarproject/bramble/account/AccountManagerImpl.java

@@ -159,8 +159,6 @@ class AccountManagerImpl implements AccountManager {
 	@Override
 	public boolean createAccount(String name, String password) {
 		synchronized (stateChangeLock) {
-			if (hasDatabaseKey())
-				throw new AssertionError("Already have a database key");
 			LocalAuthor localAuthor = identityManager.createLocalAuthor(name);
 			identityManager.registerLocalAuthor(localAuthor);
 			SecretKey key = crypto.generateSecretKey();
@@ -183,7 +181,6 @@ class AccountManagerImpl implements AccountManager {
 			LOG.info("Deleting account");
 			IoUtils.deleteFileOrDir(databaseConfig.getDatabaseKeyDirectory());
 			IoUtils.deleteFileOrDir(databaseConfig.getDatabaseDirectory());
-			databaseKey = null;
 		}
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/client/ClientHelperImpl.java

@@ -41,6 +41,7 @@ import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_AUTHOR_N
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_PUBLIC_KEY_LENGTH;
 import static org.briarproject.bramble.api.properties.TransportPropertyConstants.MAX_PROPERTIES_PER_TRANSPORT;
 import static org.briarproject.bramble.api.properties.TransportPropertyConstants.MAX_PROPERTY_LENGTH;
+import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 import static org.briarproject.bramble.util.ValidationUtils.checkLength;
 import static org.briarproject.bramble.util.ValidationUtils.checkSize;
 
@@ -126,7 +127,9 @@ class ClientHelperImpl implements ClientHelper {
 
 	@Override
 	public Message getMessage(Transaction txn, MessageId m) throws DbException {
-		return db.getMessage(txn, m);
+		byte[] raw = db.getRawMessage(txn, m);
+		if (raw == null) return null;
+		return messageFactory.createMessage(m, raw);
 	}
 
 	@Override
@@ -146,7 +149,10 @@ class ClientHelperImpl implements ClientHelper {
 	@Override
 	public BdfList getMessageAsList(Transaction txn, MessageId m)
 			throws DbException, FormatException {
-		return toList(db.getMessage(txn, m).getBody());
+		byte[] raw = db.getRawMessage(txn, m);
+		if (raw == null) return null;
+		return toList(raw, MESSAGE_HEADER_LENGTH,
+				raw.length - MESSAGE_HEADER_LENGTH);
 	}
 
 	@Override
@@ -358,7 +364,9 @@ class ClientHelperImpl implements ClientHelper {
 
 	@Override
 	public BdfList toList(Message m) throws FormatException {
-		return toList(m.getBody());
+		byte[] raw = m.getRaw();
+		return toList(raw, MESSAGE_HEADER_LENGTH,
+				raw.length - MESSAGE_HEADER_LENGTH);
 	}
 
 	@Override

bramble-core/src/main/java/org/briarproject/bramble/db/Database.java

@@ -6,7 +6,6 @@ import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DataTooNewException;
 import org.briarproject.bramble.api.db.DataTooOldException;
 import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.db.MessageDeletedException;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.identity.Author;
@@ -298,15 +297,6 @@ interface Database<T> {
 	 */
 	Collection<LocalAuthor> getLocalAuthors(T txn) throws DbException;
 
-	/**
-	 * Returns the message with the given ID.
-	 * <p/>
-	 * Read-only.
-	 *
-	 * @throws MessageDeletedException if the message has been deleted
-	 */
-	Message getMessage(T txn, MessageId m) throws DbException;
-
 	/**
 	 * Returns the IDs and states of all dependencies of the given message.
 	 * For missing dependencies and dependencies in other groups, the state
@@ -421,7 +411,7 @@ interface Database<T> {
 	 * Read-only.
 	 */
 	Collection<MessageId> getMessagesToOffer(T txn, ContactId c,
-			int maxMessages, int maxLatency) throws DbException;
+			int maxMessages) throws DbException;
 
 	/**
 	 * Returns the IDs of some messages that are eligible to be requested from
@@ -438,8 +428,8 @@ interface Database<T> {
 	 * <p/>
 	 * Read-only.
 	 */
-	Collection<MessageId> getMessagesToSend(T txn, ContactId c, int maxLength,
-			int maxLatency) throws DbException;
+	Collection<MessageId> getMessagesToSend(T txn, ContactId c, int maxLength)
+			throws DbException;
 
 	/**
 	 * Returns the IDs of any messages that need to be validated.
@@ -474,6 +464,15 @@ interface Database<T> {
 	 */
 	long getNextSendTime(T txn, ContactId c) throws DbException;
 
+	/**
+	 * Returns the message with the given ID, in serialised form, or null if
+	 * the message has been deleted.
+	 * <p/>
+	 * Read-only.
+	 */
+	@Nullable
+	byte[] getRawMessage(T txn, MessageId m) throws DbException;
+
 	/**
 	 * Returns the IDs of some messages that are eligible to be sent to the
 	 * given contact and have been requested by the contact, up to the given
@@ -482,7 +481,7 @@ interface Database<T> {
 	 * Read-only.
 	 */
 	Collection<MessageId> getRequestedMessagesToSend(T txn, ContactId c,
-			int maxLength, int maxLatency) throws DbException;
+			int maxLength) throws DbException;
 
 	/**
 	 * Returns all settings in the given namespace.
@@ -647,11 +646,11 @@ interface Database<T> {
 			throws DbException;
 
 	/**
-	 * Updates the transmission count, expiry time and estimated time of arrival
-	 * of the given message with respect to the given contact, using the latency
-	 * of the transport over which it was sent.
+	 * Updates the transmission count and expiry time of the given message
+	 * with respect to the given contact, using the latency of the transport
+	 * over which it was sent.
 	 */
-	void updateExpiryTimeAndEta(T txn, ContactId c, MessageId m, int maxLatency)
+	void updateExpiryTime(T txn, ContactId c, MessageId m, int maxLatency)
 			throws DbException;
 
 	/**

bramble-core/src/main/java/org/briarproject/bramble/db/DatabaseComponentImpl.java

@@ -307,18 +307,17 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 
 	@Nullable
 	@Override
-	public Collection<Message> generateBatch(Transaction transaction,
+	public Collection<byte[]> generateBatch(Transaction transaction,
 			ContactId c, int maxLength, int maxLatency) throws DbException {
 		if (transaction.isReadOnly()) throw new IllegalArgumentException();
 		T txn = unbox(transaction);
 		if (!db.containsContact(txn, c))
 			throw new NoSuchContactException();
-		Collection<MessageId> ids =
-				db.getMessagesToSend(txn, c, maxLength, maxLatency);
-		List<Message> messages = new ArrayList<>(ids.size());
+		Collection<MessageId> ids = db.getMessagesToSend(txn, c, maxLength);
+		List<byte[]> messages = new ArrayList<>(ids.size());
 		for (MessageId m : ids) {
-			messages.add(db.getMessage(txn, m));
-			db.updateExpiryTimeAndEta(txn, c, m, maxLatency);
+			messages.add(db.getRawMessage(txn, m));
+			db.updateExpiryTime(txn, c, m, maxLatency);
 		}
 		if (ids.isEmpty()) return null;
 		db.lowerRequestedFlag(txn, c, ids);
@@ -334,11 +333,9 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		T txn = unbox(transaction);
 		if (!db.containsContact(txn, c))
 			throw new NoSuchContactException();
-		Collection<MessageId> ids =
-				db.getMessagesToOffer(txn, c, maxMessages, maxLatency);
+		Collection<MessageId> ids = db.getMessagesToOffer(txn, c, maxMessages);
 		if (ids.isEmpty()) return null;
-		for (MessageId m : ids)
-			db.updateExpiryTimeAndEta(txn, c, m, maxLatency);
+		for (MessageId m : ids) db.updateExpiryTime(txn, c, m, maxLatency);
 		return new Offer(ids);
 	}
 
@@ -359,18 +356,18 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 
 	@Nullable
 	@Override
-	public Collection<Message> generateRequestedBatch(Transaction transaction,
+	public Collection<byte[]> generateRequestedBatch(Transaction transaction,
 			ContactId c, int maxLength, int maxLatency) throws DbException {
 		if (transaction.isReadOnly()) throw new IllegalArgumentException();
 		T txn = unbox(transaction);
 		if (!db.containsContact(txn, c))
 			throw new NoSuchContactException();
-		Collection<MessageId> ids =
-				db.getRequestedMessagesToSend(txn, c, maxLength, maxLatency);
-		List<Message> messages = new ArrayList<>(ids.size());
+		Collection<MessageId> ids = db.getRequestedMessagesToSend(txn, c,
+				maxLength);
+		List<byte[]> messages = new ArrayList<>(ids.size());
 		for (MessageId m : ids) {
-			messages.add(db.getMessage(txn, m));
-			db.updateExpiryTimeAndEta(txn, c, m, maxLatency);
+			messages.add(db.getRawMessage(txn, m));
+			db.updateExpiryTime(txn, c, m, maxLatency);
 		}
 		if (ids.isEmpty()) return null;
 		db.lowerRequestedFlag(txn, c, ids);
@@ -460,15 +457,6 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		return db.getLocalAuthors(txn);
 	}
 
-	@Override
-	public Message getMessage(Transaction transaction, MessageId m)
-			throws DbException {
-		T txn = unbox(transaction);
-		if (!db.containsMessage(txn, m))
-			throw new NoSuchMessageException();
-		return db.getMessage(txn, m);
-	}
-
 	@Override
 	public Collection<MessageId> getMessageIds(Transaction transaction,
 			GroupId g) throws DbException {
@@ -499,6 +487,16 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		return db.getMessagesToShare(txn);
 	}
 
+	@Nullable
+	@Override
+	public byte[] getRawMessage(Transaction transaction, MessageId m)
+			throws DbException {
+		T txn = unbox(transaction);
+		if (!db.containsMessage(txn, m))
+			throw new NoSuchMessageException();
+		return db.getRawMessage(txn, m);
+	}
+
 	@Override
 	public Map<MessageId, Metadata> getMessageMetadata(Transaction transaction,
 			GroupId g) throws DbException {
@@ -658,7 +656,7 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		merged.putAll(s);
 		if (!merged.equals(old)) {
 			db.mergeSettings(txn, s, namespace);
-			transaction.attach(new SettingsUpdatedEvent(namespace, merged));
+			transaction.attach(new SettingsUpdatedEvent(namespace));
 		}
 	}
 
@@ -858,8 +856,7 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		if (!db.containsMessage(txn, m))
 			throw new NoSuchMessageException();
 		if (db.getMessageState(txn, m) != DELIVERED)
-			throw new IllegalArgumentException(
-					"Shared undelivered message");
+			throw new IllegalArgumentException("Shared undelivered message");
 		db.setMessageShared(txn, m);
 		transaction.attach(new MessageSharedEvent(m));
 	}
@@ -885,8 +882,7 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 			throw new NoSuchMessageException();
 		State dependentState = db.getMessageState(txn, dependent.getId());
 		for (MessageId dependency : dependencies) {
-			db.addMessageDependency(txn, dependent, dependency,
-					dependentState);
+			db.addMessageDependency(txn, dependent, dependency, dependentState);
 		}
 	}
 
@@ -918,8 +914,7 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		T txn = unbox(transaction);
 		for (KeySet ks : keys) {
 			TransportId t = ks.getTransportKeys().getTransportId();
-			if (db.containsTransport(txn, t))
-				db.updateTransportKeys(txn, ks);
+			if (db.containsTransport(txn, t)) db.updateTransportKeys(txn, ks);
 		}
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/db/DatabaseModule.java

@@ -4,7 +4,6 @@ import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.lifecycle.ShutdownManager;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 
 import java.sql.Connection;
@@ -19,9 +18,8 @@ public class DatabaseModule {
 
 	@Provides
 	@Singleton
-	Database<Connection> provideDatabase(DatabaseConfig config,
-			MessageFactory messageFactory, Clock clock) {
-		return new H2Database(config, messageFactory, clock);
+	Database<Connection> provideDatabase(DatabaseConfig config, Clock clock) {
+		return new H2Database(config, clock);
 	}
 
 	@Provides

bramble-core/src/main/java/org/briarproject/bramble/db/H2Database.java

@@ -5,7 +5,6 @@ import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.util.StringUtils;
 
@@ -37,10 +36,9 @@ class H2Database extends JdbcDatabase {
 	private volatile SecretKey key = null;
 
 	@Inject
-	H2Database(DatabaseConfig config, MessageFactory messageFactory,
-			Clock clock) {
+	H2Database(DatabaseConfig config, Clock clock) {
 		super(HASH_TYPE, SECRET_TYPE, BINARY_TYPE, COUNTER_TYPE, STRING_TYPE,
-				messageFactory, clock);
+				clock);
 		this.config = config;
 		File dir = config.getDatabaseDirectory();
 		String path = new File(dir, "db").getAbsolutePath();

bramble-core/src/main/java/org/briarproject/bramble/db/HyperSqlDatabase.java

@@ -5,7 +5,6 @@ import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.util.StringUtils;
 
@@ -38,10 +37,9 @@ class HyperSqlDatabase extends JdbcDatabase {
 	private volatile SecretKey key = null;
 
 	@Inject
-	HyperSqlDatabase(DatabaseConfig config, MessageFactory messageFactory,
-			Clock clock) {
+	HyperSqlDatabase(DatabaseConfig config, Clock clock) {
 		super(HASH_TYPE, SECRET_TYPE, BINARY_TYPE, COUNTER_TYPE, STRING_TYPE,
-				messageFactory, clock);
+				clock);
 		this.config = config;
 		File dir = config.getDatabaseDirectory();
 		String path = new File(dir, "db").getAbsolutePath();

bramble-core/src/main/java/org/briarproject/bramble/db/JdbcDatabase.java

@@ -7,7 +7,6 @@ import org.briarproject.bramble.api.db.DataTooNewException;
 import org.briarproject.bramble.api.db.DataTooOldException;
 import org.briarproject.bramble.api.db.DbClosedException;
 import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.db.MessageDeletedException;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.identity.Author;
@@ -21,7 +20,6 @@ import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.Group.Visibility;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.Message;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.MessageStatus;
 import org.briarproject.bramble.api.sync.ValidationManager.State;
@@ -38,7 +36,6 @@ import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
@@ -56,13 +53,13 @@ import java.util.logging.Logger;
 import javax.annotation.Nullable;
 
 import static java.sql.Types.INTEGER;
+import static java.util.Collections.singletonList;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.db.Metadata.REMOVE;
 import static org.briarproject.bramble.api.sync.Group.Visibility.INVISIBLE;
 import static org.briarproject.bramble.api.sync.Group.Visibility.SHARED;
 import static org.briarproject.bramble.api.sync.Group.Visibility.VISIBLE;
-import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.DELIVERED;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.PENDING;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.UNKNOWN;
@@ -79,7 +76,7 @@ import static org.briarproject.bramble.util.LogUtils.logException;
 abstract class JdbcDatabase implements Database<Connection> {
 
 	// Package access for testing
-	static final int CODE_SCHEMA_VERSION = 40;
+	static final int CODE_SCHEMA_VERSION = 39;
 
 	// Rotation period offsets for incoming transport keys
 	private static final int OFFSET_PREV = -1;
@@ -219,7 +216,6 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " requested BOOLEAN NOT NULL,"
 					+ " expiry BIGINT NOT NULL,"
 					+ " txCount INT NOT NULL,"
-					+ " eta BIGINT NOT NULL,"
 					+ " PRIMARY KEY (messageId, contactId),"
 					+ " FOREIGN KEY (messageId)"
 					+ " REFERENCES messages (messageId)"
@@ -308,7 +304,6 @@ abstract class JdbcDatabase implements Database<Connection> {
 	// Different database libraries use different names for certain types
 	private final String hashType, secretType, binaryType;
 	private final String counterType, stringType;
-	private final MessageFactory messageFactory;
 	private final Clock clock;
 
 	// Locking: connectionsLock
@@ -324,14 +319,12 @@ abstract class JdbcDatabase implements Database<Connection> {
 	private final Condition connectionsChanged = connectionsLock.newCondition();
 
 	JdbcDatabase(String hashType, String secretType, String binaryType,
-			String counterType, String stringType,
-			MessageFactory messageFactory, Clock clock) {
+			String counterType, String stringType, Clock clock) {
 		this.hashType = hashType;
 		this.secretType = secretType;
 		this.binaryType = binaryType;
 		this.counterType = counterType;
 		this.stringType = stringType;
-		this.messageFactory = messageFactory;
 		this.clock = clock;
 	}
 
@@ -398,7 +391,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	// Package access for testing
 	List<Migration<Connection>> getMigrations() {
-		return Arrays.asList(new Migration38_39(), new Migration39_40());
+		return singletonList(new Migration38_39());
 	}
 
 	private void storeSchemaVersion(Connection txn, int version)
@@ -733,7 +726,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 			ps.setLong(3, m.getTimestamp());
 			ps.setInt(4, state.getValue());
 			ps.setBoolean(5, messageShared);
-			byte[] raw = messageFactory.getRawMessage(m);
+			byte[] raw = m.getRaw();
 			ps.setInt(6, raw.length);
 			ps.setBytes(7, raw);
 			int affected = ps.executeUpdate();
@@ -747,7 +740,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 				boolean offered = removeOfferedMessage(txn, c, m.getId());
 				boolean seen = offered || (sender != null && c.equals(sender));
 				addStatus(txn, m.getId(), c, m.getGroupId(), m.getTimestamp(),
-						raw.length, state, e.getValue(), messageShared,
+						m.getLength(), state, e.getValue(), messageShared,
 						false, seen);
 			}
 			// Update denormalised column in messageDependencies if dependency
@@ -806,9 +799,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 		try {
 			String sql = "INSERT INTO statuses (messageId, contactId, groupId,"
 					+ " timestamp, length, state, groupShared, messageShared,"
-					+ " deleted, ack, seen, requested, expiry, txCount, eta)"
-					+ " VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, FALSE, 0, 0,"
-					+ " 0)";
+					+ " deleted, ack, seen, requested, expiry, txCount)"
+					+ " VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, FALSE, 0, 0)";
 			ps = txn.prepareStatement(sql);
 			ps.setBytes(1, m.getBytes());
 			ps.setInt(2, c.getInt());
@@ -1490,35 +1482,6 @@ abstract class JdbcDatabase implements Database<Connection> {
 		}
 	}
 
-	@Override
-	public Message getMessage(Connection txn, MessageId m) throws DbException {
-		PreparedStatement ps = null;
-		ResultSet rs = null;
-		try {
-			String sql = "SELECT groupId, timestamp, raw FROM messages"
-					+ " WHERE messageId = ?";
-			ps = txn.prepareStatement(sql);
-			ps.setBytes(1, m.getBytes());
-			rs = ps.executeQuery();
-			if (!rs.next()) throw new DbStateException();
-			GroupId g = new GroupId(rs.getBytes(1));
-			long timestamp = rs.getLong(2);
-			byte[] raw = rs.getBytes(3);
-			if (rs.next()) throw new DbStateException();
-			rs.close();
-			ps.close();
-			if (raw == null) throw new MessageDeletedException();
-			if (raw.length < MESSAGE_HEADER_LENGTH) throw new AssertionError();
-			byte[] body = new byte[raw.length - MESSAGE_HEADER_LENGTH];
-			System.arraycopy(raw, MESSAGE_HEADER_LENGTH, body, 0, body.length);
-			return new Message(m, g, timestamp, body);
-		} catch (SQLException e) {
-			tryToClose(rs);
-			tryToClose(ps);
-			throw new DbException(e);
-		}
-	}
-
 	@Override
 	public Collection<MessageId> getMessageIds(Connection txn, GroupId g)
 			throws DbException {
@@ -1871,9 +1834,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	@Override
 	public Collection<MessageId> getMessagesToOffer(Connection txn,
-			ContactId c, int maxMessages, int maxLatency) throws DbException {
+			ContactId c, int maxMessages) throws DbException {
 		long now = clock.currentTimeMillis();
-		long eta = now + maxLatency;
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
@@ -1882,14 +1844,13 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " AND groupShared = TRUE AND messageShared = TRUE"
 					+ " AND deleted = FALSE"
 					+ " AND seen = FALSE AND requested = FALSE"
-					+ " AND (expiry <= ? OR eta > ?)"
+					+ " AND expiry < ?"
 					+ " ORDER BY timestamp LIMIT ?";
 			ps = txn.prepareStatement(sql);
 			ps.setInt(1, c.getInt());
 			ps.setInt(2, DELIVERED.getValue());
 			ps.setLong(3, now);
-			ps.setLong(4, eta);
-			ps.setInt(5, maxMessages);
+			ps.setInt(4, maxMessages);
 			rs = ps.executeQuery();
 			List<MessageId> ids = new ArrayList<>();
 			while (rs.next()) ids.add(new MessageId(rs.getBytes(1)));
@@ -1930,9 +1891,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	@Override
 	public Collection<MessageId> getMessagesToSend(Connection txn, ContactId c,
-			int maxLength, int maxLatency) throws DbException {
+			int maxLength) throws DbException {
 		long now = clock.currentTimeMillis();
-		long eta = now + maxLatency;
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
@@ -1941,13 +1901,12 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " AND groupShared = TRUE AND messageShared = TRUE"
 					+ " AND deleted = FALSE"
 					+ " AND seen = FALSE"
-					+ " AND (expiry <= ? OR eta > ?)"
+					+ " AND expiry < ?"
 					+ " ORDER BY timestamp";
 			ps = txn.prepareStatement(sql);
 			ps.setInt(1, c.getInt());
 			ps.setInt(2, DELIVERED.getValue());
 			ps.setLong(3, now);
-			ps.setLong(4, eta);
 			rs = ps.executeQuery();
 			List<MessageId> ids = new ArrayList<>();
 			int total = 0;
@@ -2059,11 +2018,34 @@ abstract class JdbcDatabase implements Database<Connection> {
 		}
 	}
 
+	@Override
+	@Nullable
+	public byte[] getRawMessage(Connection txn, MessageId m)
+			throws DbException {
+		PreparedStatement ps = null;
+		ResultSet rs = null;
+		try {
+			String sql = "SELECT raw FROM messages WHERE messageId = ?";
+			ps = txn.prepareStatement(sql);
+			ps.setBytes(1, m.getBytes());
+			rs = ps.executeQuery();
+			if (!rs.next()) throw new DbStateException();
+			byte[] raw = rs.getBytes(1);
+			if (rs.next()) throw new DbStateException();
+			rs.close();
+			ps.close();
+			return raw;
+		} catch (SQLException e) {
+			tryToClose(rs);
+			tryToClose(ps);
+			throw new DbException(e);
+		}
+	}
+
 	@Override
 	public Collection<MessageId> getRequestedMessagesToSend(Connection txn,
-			ContactId c, int maxLength, int maxLatency) throws DbException {
+			ContactId c, int maxLength) throws DbException {
 		long now = clock.currentTimeMillis();
-		long eta = now + maxLatency;
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
@@ -2072,13 +2054,12 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " AND groupShared = TRUE AND messageShared = TRUE"
 					+ " AND deleted = FALSE"
 					+ " AND seen = FALSE AND requested = TRUE"
-					+ " AND (expiry <= ? OR eta > ?)"
+					+ " AND expiry < ?"
 					+ " ORDER BY timestamp";
 			ps = txn.prepareStatement(sql);
 			ps.setInt(1, c.getInt());
 			ps.setInt(2, DELIVERED.getValue());
 			ps.setLong(3, now);
-			ps.setLong(4, eta);
 			rs = ps.executeQuery();
 			List<MessageId> ids = new ArrayList<>();
 			int total = 0;
@@ -2889,7 +2870,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 	}
 
 	@Override
-	public void updateExpiryTimeAndEta(Connection txn, ContactId c, MessageId m,
+	public void updateExpiryTime(Connection txn, ContactId c, MessageId m,
 			int maxLatency) throws DbException {
 		PreparedStatement ps = null;
 		ResultSet rs = null;
@@ -2905,16 +2886,13 @@ abstract class JdbcDatabase implements Database<Connection> {
 			if (rs.next()) throw new DbStateException();
 			rs.close();
 			ps.close();
-			sql = "UPDATE statuses"
-					+ " SET expiry = ?, txCount = txCount + 1, eta = ?"
+			sql = "UPDATE statuses SET expiry = ?, txCount = txCount + 1"
 					+ " WHERE messageId = ? AND contactId = ?";
 			ps = txn.prepareStatement(sql);
 			long now = clock.currentTimeMillis();
-			long eta = now + maxLatency;
 			ps.setLong(1, calculateExpiry(now, maxLatency, txCount));
-			ps.setLong(2, eta);
-			ps.setBytes(3, m.getBytes());
-			ps.setInt(4, c.getInt());
+			ps.setBytes(2, m.getBytes());
+			ps.setInt(3, c.getInt());
 			int affected = ps.executeUpdate();
 			if (affected != 1) throw new DbStateException();
 			ps.close();

bramble-core/src/main/java/org/briarproject/bramble/db/Migration39_40.java

@@ -1,54 +0,0 @@
-package org.briarproject.bramble.db;
-
-import org.briarproject.bramble.api.db.DbException;
-
-import java.sql.Connection;
-import java.sql.SQLException;
-import java.sql.Statement;
-import java.util.logging.Logger;
-
-import javax.annotation.Nullable;
-
-import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
-
-class Migration39_40 implements Migration<Connection> {
-
-	private static final Logger LOG =
-			Logger.getLogger(Migration39_40.class.getName());
-
-	@Override
-	public int getStartVersion() {
-		return 39;
-	}
-
-	@Override
-	public int getEndVersion() {
-		return 40;
-	}
-
-	@Override
-	public void migrate(Connection txn) throws DbException {
-		Statement s = null;
-		try {
-			s = txn.createStatement();
-			s.execute("ALTER TABLE statuses"
-					+ " ADD eta BIGINT");
-			s.execute("UPDATE statuses SET eta = 0");
-			s.execute("ALTER TABLE statuses"
-					+ " ALTER COLUMN eta"
-					+ " SET NOT NULL");
-		} catch (SQLException e) {
-			tryToClose(s);
-			throw new DbException(e);
-		}
-	}
-
-	private void tryToClose(@Nullable Statement s) {
-		try {
-			if (s != null) s.close();
-		} catch (SQLException e) {
-			logException(LOG, WARNING, e);
-		}
-	}
-}

bramble-core/src/main/java/org/briarproject/bramble/keyagreement/KeyAgreementTaskImpl.java

@@ -102,7 +102,6 @@ class KeyAgreementTaskImpl extends Thread implements KeyAgreementTask,
 		KeyAgreementTransport transport =
 				connector.connect(remotePayload, alice);
 		if (transport == null) {
-			LOG.warning("Key agreement failed. Transport was null.");
 			// Notify caller that the connection failed
 			eventBus.broadcast(new KeyAgreementFailedEvent());
 			return;

bramble-core/src/main/java/org/briarproject/bramble/keyagreement/PayloadParserImpl.java

@@ -1,13 +1,13 @@
 package org.briarproject.bramble.keyagreement;
 
 import org.briarproject.bramble.api.FormatException;
+import org.briarproject.bramble.api.UnsupportedVersionException;
 import org.briarproject.bramble.api.data.BdfList;
 import org.briarproject.bramble.api.data.BdfReader;
 import org.briarproject.bramble.api.data.BdfReaderFactory;
 import org.briarproject.bramble.api.keyagreement.Payload;
 import org.briarproject.bramble.api.keyagreement.PayloadParser;
 import org.briarproject.bramble.api.keyagreement.TransportDescriptor;
-import org.briarproject.bramble.api.keyagreement.UnsupportedVersionException;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.BluetoothConstants;
 import org.briarproject.bramble.api.plugin.LanTcpConstants;
@@ -21,7 +21,6 @@ import java.util.List;
 import javax.annotation.concurrent.Immutable;
 import javax.inject.Inject;
 
-import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.BETA_PROTOCOL_VERSION;
 import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.COMMIT_LENGTH;
 import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.PROTOCOL_VERSION;
 import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.TRANSPORT_ID_BLUETOOTH;
@@ -44,11 +43,8 @@ class PayloadParserImpl implements PayloadParser {
 		// First byte: the protocol version
 		int protocolVersion = in.read();
 		if (protocolVersion == -1) throw new FormatException();
-		if (protocolVersion != PROTOCOL_VERSION) {
-			boolean tooOld = protocolVersion < PROTOCOL_VERSION ||
-					protocolVersion == BETA_PROTOCOL_VERSION;
-			throw new UnsupportedVersionException(tooOld);
-		}
+		if (protocolVersion != PROTOCOL_VERSION)
+			throw new UnsupportedVersionException();
 		// The rest of the payload is a BDF list with one or more elements
 		BdfReader r = bdfReaderFactory.createReader(in);
 		BdfList payload = r.readList();

bramble-core/src/main/java/org/briarproject/bramble/plugin/bluetooth/BluetoothPlugin.java

@@ -21,7 +21,6 @@ import org.briarproject.bramble.api.plugin.event.BluetoothEnabledEvent;
 import org.briarproject.bramble.api.plugin.event.DisableBluetoothEvent;
 import org.briarproject.bramble.api.plugin.event.EnableBluetoothEvent;
 import org.briarproject.bramble.api.properties.TransportProperties;
-import org.briarproject.bramble.api.settings.Settings;
 import org.briarproject.bramble.api.settings.event.SettingsUpdatedEvent;
 import org.briarproject.bramble.util.StringUtils;
 
@@ -147,15 +146,16 @@ abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
 		}
 		updateProperties();
 		running = true;
-		loadSettings(callback.getSettings());
+		loadSettings();
 		if (shouldAllowContactConnections()) {
 			if (isAdapterEnabled()) bind();
 			else enableAdapter();
 		}
 	}
 
-	private void loadSettings(Settings settings) {
-		contactConnections = settings.getBoolean(PREF_BT_ENABLE, false);
+	private void loadSettings() {
+		contactConnections =
+				callback.getSettings().getBoolean(PREF_BT_ENABLE, false);
 	}
 
 	private boolean shouldAllowContactConnections() {
@@ -387,7 +387,7 @@ abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
 		} else if (e instanceof SettingsUpdatedEvent) {
 			SettingsUpdatedEvent s = (SettingsUpdatedEvent) e;
 			if (s.getNamespace().equals(ID.getString()))
-				ioExecutor.execute(() -> onSettingsUpdated(s.getSettings()));
+				ioExecutor.execute(this::onSettingsUpdated);
 		} else if (e instanceof KeyAgreementListeningEvent) {
 			ioExecutor.execute(connectionLimiter::keyAgreementStarted);
 		} else if (e instanceof KeyAgreementStoppedListeningEvent) {
@@ -395,9 +395,9 @@ abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
 		}
 	}
 
-	private void onSettingsUpdated(Settings settings) {
+	private void onSettingsUpdated() {
 		boolean wasAllowed = shouldAllowContactConnections();
-		loadSettings(settings);
+		loadSettings();
 		boolean isAllowed = shouldAllowContactConnections();
 		if (wasAllowed && !isAllowed) {
 			LOG.info("Contact connections disabled");

bramble-core/src/main/java/org/briarproject/bramble/plugin/tcp/TcpPlugin.java

@@ -24,7 +24,7 @@ import java.net.SocketException;
 import java.net.UnknownHostException;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Enumeration;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
@@ -35,9 +35,6 @@ import java.util.regex.Pattern;
 
 import javax.annotation.Nullable;
 
-import static java.net.NetworkInterface.getNetworkInterfaces;
-import static java.util.Collections.emptyList;
-import static java.util.Collections.list;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.util.LogUtils.logException;
@@ -306,16 +303,16 @@ abstract class TcpPlugin implements DuplexPlugin {
 	}
 
 	Collection<InetAddress> getLocalIpAddresses() {
+		List<NetworkInterface> ifaces;
 		try {
-			Enumeration<NetworkInterface> ifaces = getNetworkInterfaces();
-			if (ifaces == null) return emptyList();
-			List<InetAddress> addrs = new ArrayList<>();
-			for (NetworkInterface iface : list(ifaces))
-				addrs.addAll(list(iface.getInetAddresses()));
-			return addrs;
+			ifaces = Collections.list(NetworkInterface.getNetworkInterfaces());
 		} catch (SocketException e) {
 			logException(LOG, WARNING, e);
-			return emptyList();
+			return Collections.emptyList();
 		}
+		List<InetAddress> addrs = new ArrayList<>();
+		for (NetworkInterface iface : ifaces)
+			addrs.addAll(Collections.list(iface.getInetAddresses()));
+		return addrs;
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/plugin/tor/CircumventionProviderImpl.java

@@ -1,6 +1,7 @@
 package org.briarproject.bramble.plugin.tor;
 
 import org.briarproject.bramble.api.lifecycle.IoExecutor;
+import org.briarproject.bramble.api.system.ResourceProvider;
 
 import java.io.InputStream;
 import java.util.ArrayList;
@@ -23,11 +24,14 @@ class CircumventionProviderImpl implements CircumventionProvider {
 	private static final Set<String> BRIDGES_WORK_IN_COUNTRIES =
 			new HashSet<>(asList(BRIDGES));
 
+	private final ResourceProvider resourceProvider;
+
 	@Nullable
 	private volatile List<String> bridges = null;
 
 	@Inject
-	CircumventionProviderImpl() {
+	CircumventionProviderImpl(ResourceProvider resourceProvider) {
+		this.resourceProvider = resourceProvider;
 	}
 
 	@Override
@@ -46,8 +50,8 @@ class CircumventionProviderImpl implements CircumventionProvider {
 		List<String> bridges = this.bridges;
 		if (bridges != null) return new ArrayList<>(bridges);
 
-		InputStream is = getClass().getClassLoader()
-				.getResourceAsStream(BRIDGE_FILE_NAME);
+		InputStream is =
+				resourceProvider.getResourceInputStream(BRIDGE_FILE_NAME);
 		Scanner scanner = new Scanner(is);
 
 		bridges = new ArrayList<>();

bramble-core/src/main/java/org/briarproject/bramble/plugin/tor/TorPlugin.java

@@ -64,11 +64,11 @@ import static net.freehaven.tor.control.TorControlCommands.HS_ADDRESS;
 import static net.freehaven.tor.control.TorControlCommands.HS_PRIVKEY;
 import static org.briarproject.bramble.api.plugin.TorConstants.CONTROL_PORT;
 import static org.briarproject.bramble.api.plugin.TorConstants.ID;
-import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_MOBILE;
+import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_DISABLE_BLOCKED;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK;
-import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_AUTOMATIC;
+import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_ALWAYS;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_NEVER;
-import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_WITH_BRIDGES;
+import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_WIFI;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_PORT;
 import static org.briarproject.bramble.api.plugin.TorConstants.PROP_ONION;
 import static org.briarproject.bramble.util.LogUtils.logException;
@@ -108,7 +108,6 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private volatile ServerSocket socket = null;
 	private volatile Socket controlSocket = null;
 	private volatile TorControlConnection controlConnection = null;
-	private volatile Settings settings = null;
 
 	protected volatile boolean running = false;
 
@@ -167,20 +166,10 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	@Override
 	public void start() throws PluginException {
 		if (used.getAndSet(true)) throw new IllegalStateException();
-		if (!torDirectory.exists()) {
-			if (!torDirectory.mkdirs()) {
-				LOG.warning("Could not create Tor directory.");
-				throw new PluginException();
-			}
-		}
-		// Load the settings
-		settings = callback.getSettings();
 		// Install or update the assets if necessary
 		if (!assetsAreUpToDate()) installAssets();
 		if (cookieFile.exists() && !cookieFile.delete())
 			LOG.warning("Old auth cookie not deleted");
-		// Migrate old settings before having a chance to stop
-		migrateSettings();
 		// Start a new Tor process
 		LOG.info("Starting Tor");
 		String torPath = torFile.getAbsolutePath();
@@ -297,23 +286,22 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private InputStream getTorInputStream() throws IOException {
 		if (LOG.isLoggable(INFO))
 			LOG.info("Installing Tor binary for " + architecture);
-		InputStream in = resourceProvider
-				.getResourceInputStream("tor_" + architecture, ".zip");
+		InputStream in =
+				resourceProvider.getResourceInputStream("tor_" + architecture);
 		ZipInputStream zin = new ZipInputStream(in);
 		if (zin.getNextEntry() == null) throw new IOException();
 		return zin;
 	}
 
 	private InputStream getGeoIpInputStream() throws IOException {
-		InputStream in = resourceProvider.getResourceInputStream("geoip",
-				".zip");
+		InputStream in = resourceProvider.getResourceInputStream("geoip");
 		ZipInputStream zin = new ZipInputStream(in);
 		if (zin.getNextEntry() == null) throw new IOException();
 		return zin;
 	}
 
 	private InputStream getConfigInputStream() {
-		return getClass().getClassLoader().getResourceAsStream("torrc");
+		return resourceProvider.getResourceInputStream("torrc");
 	}
 
 	private void tryToClose(@Nullable Closeable c) {
@@ -360,7 +348,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private void bind() {
 		ioExecutor.execute(() -> {
 			// If there's already a port number stored in config, reuse it
-			String portString = settings.get(PREF_TOR_PORT);
+			String portString = callback.getSettings().get(PREF_TOR_PORT);
 			int port;
 			if (StringUtils.isNullOrEmpty(portString)) port = 0;
 			else port = Integer.parseInt(portString);
@@ -405,7 +393,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private void publishHiddenService(String port) {
 		if (!running) return;
 		LOG.info("Creating hidden service");
-		String privKey = settings.get(HS_PRIVKEY);
+		String privKey = callback.getSettings().get(HS_PRIVKEY);
 		Map<Integer, String> portLines =
 				Collections.singletonMap(80, "127.0.0.1:" + port);
 		Map<String, String> response;
@@ -588,8 +576,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 
 	@Override
 	public void orConnStatus(String status, String orName) {
-		if (LOG.isLoggable(INFO))
-			LOG.info("OR connection " + status + " " + orName);
+		if (LOG.isLoggable(INFO)) LOG.info("OR connection " + status);
 		if (status.equals("CLOSED") || status.equals("FAILED")) {
 			// Check whether we've lost connectivity
 			updateConnectionStatus(networkManager.getNetworkStatus());
@@ -626,7 +613,6 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			SettingsUpdatedEvent s = (SettingsUpdatedEvent) e;
 			if (s.getNamespace().equals(ID.getString())) {
 				LOG.info("Tor settings updated");
-				settings = s.getSettings();
 				updateConnectionStatus(networkManager.getNetworkStatus());
 			}
 		} else if (e instanceof NetworkStatusEvent) {
@@ -642,11 +628,10 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			String country = locationUtils.getCurrentCountry();
 			boolean blocked =
 					circumventionProvider.isTorProbablyBlocked(country);
-			int network = settings.getInt(PREF_TOR_NETWORK,
-					PREF_TOR_NETWORK_AUTOMATIC);
-			boolean useMobile = settings.getBoolean(PREF_TOR_MOBILE, true);
-			boolean bridgesWork = circumventionProvider.doBridgesWork(country);
-			boolean automatic = network == PREF_TOR_NETWORK_AUTOMATIC;
+			Settings s = callback.getSettings();
+			int network = s.getInt(PREF_TOR_NETWORK, PREF_TOR_NETWORK_ALWAYS);
+			boolean disableWhenBlocked =
+					s.getBoolean(PREF_TOR_DISABLE_BLOCKED, true);
 
 			if (LOG.isLoggable(INFO)) {
 				LOG.info("Online: " + online + ", wifi: " + wifi);
@@ -658,20 +643,25 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				if (!online) {
 					LOG.info("Disabling network, device is offline");
 					enableNetwork(false);
-				} else if (network == PREF_TOR_NETWORK_NEVER ||
-						(!useMobile && !wifi)) {
-					LOG.info("Disabling network due to setting");
+				} else if (network == PREF_TOR_NETWORK_NEVER
+						|| (network == PREF_TOR_NETWORK_WIFI && !wifi)) {
+					LOG.info("Disabling network due to data setting");
 					enableNetwork(false);
-				} else if (automatic && blocked && !bridgesWork) {
-					LOG.info("Disabling network, country is blocked");
-					enableNetwork(false);
-				} else if (network == PREF_TOR_NETWORK_WITH_BRIDGES ||
-						(automatic && bridgesWork)) {
-					LOG.info("Enabling network, using bridges");
-					enableBridges(true);
-					enableNetwork(true);
+				} else if (blocked) {
+					if (circumventionProvider.doBridgesWork(country)) {
+						LOG.info("Enabling network, using bridges");
+						enableBridges(true);
+						enableNetwork(true);
+					} else if (disableWhenBlocked) {
+						LOG.info("Disabling network, country is blocked");
+						enableNetwork(false);
+					} else {
+						LOG.info("Enabling network but country is blocked");
+						enableBridges(false);
+						enableNetwork(true);
+					}
 				} else {
-					LOG.info("Enabling network, not using bridges");
+					LOG.info("Enabling network");
 					enableBridges(false);
 					enableNetwork(true);
 				}
@@ -681,21 +671,6 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		});
 	}
 
-	// TODO remove when sufficient time has passed. Added 2018-08-15
-	private void migrateSettings() {
-		Settings sOld = callback.getSettings();
-		int oldNetwork = sOld.getInt("network", -1);
-		if (oldNetwork == -1) return;
-		Settings s = new Settings();
-		if (oldNetwork == 0) {
-			s.putInt(PREF_TOR_NETWORK, PREF_TOR_NETWORK_NEVER);
-		} else if (oldNetwork == 1) {
-			s.putBoolean(PREF_TOR_MOBILE, false);
-		}
-		s.putInt("network", -1);
-		callback.mergeSettings(s);
-	}
-
 	private static class ConnectionStatus {
 
 		// All of the following are locking: this

bramble-core/src/main/java/org/briarproject/bramble/properties/TransportPropertyManagerImpl.java

@@ -164,6 +164,7 @@ class TransportPropertyManagerImpl implements TransportPropertyManager,
 			for (Entry<TransportId, LatestUpdate> e : latest.entrySet()) {
 				BdfList message = clientHelper.getMessageAsList(txn,
 						e.getValue().messageId);
+				if (message == null) throw new DbException();
 				local.put(e.getKey(), parseProperties(message));
 			}
 			return local;
@@ -186,6 +187,7 @@ class TransportPropertyManagerImpl implements TransportPropertyManager,
 					// Retrieve and parse the latest local properties
 					BdfList message = clientHelper.getMessageAsList(txn,
 							latest.messageId);
+					if (message == null) throw new DbException();
 					p = parseProperties(message);
 				}
 				db.commitTransaction(txn);
@@ -225,6 +227,7 @@ class TransportPropertyManagerImpl implements TransportPropertyManager,
 			// Retrieve and parse the latest remote properties
 			BdfList message =
 					clientHelper.getMessageAsList(txn, latest.messageId);
+			if (message == null) throw new DbException();
 			return parseProperties(message);
 		} catch (FormatException e) {
 			throw new DbException(e);
@@ -262,6 +265,7 @@ class TransportPropertyManagerImpl implements TransportPropertyManager,
 				} else {
 					BdfList message = clientHelper.getMessageAsList(txn,
 							latest.messageId);
+					if (message == null) throw new DbException();
 					TransportProperties old = parseProperties(message);
 					merged = new TransportProperties(old);
 					merged.putAll(p);

bramble-core/src/main/java/org/briarproject/bramble/settings/SettingsManagerImpl.java

@@ -34,12 +34,6 @@ class SettingsManagerImpl implements SettingsManager {
 		return s;
 	}
 
-	@Override
-	public Settings getSettings(Transaction txn, String namespace)
-			throws DbException {
-		return db.getSettings(txn, namespace);
-	}
-
 	@Override
 	public void mergeSettings(Settings s, String namespace) throws DbException {
 		Transaction txn = db.startTransaction(false);

bramble-core/src/main/java/org/briarproject/bramble/sync/DuplexOutgoingSession.java

@@ -13,7 +13,6 @@ import org.briarproject.bramble.api.lifecycle.IoExecutor;
 import org.briarproject.bramble.api.lifecycle.event.LifecycleEvent;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.Ack;
-import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.Offer;
 import org.briarproject.bramble.api.sync.Request;
 import org.briarproject.bramble.api.sync.SyncRecordWriter;
@@ -275,7 +274,7 @@ class DuplexOutgoingSession implements SyncSession, EventListener {
 			if (!generateBatchQueued.getAndSet(false))
 				throw new AssertionError();
 			try {
-				Collection<Message> b;
+				Collection<byte[]> b;
 				Transaction txn = db.startTransaction(false);
 				try {
 					b = db.generateRequestedBatch(txn, contactId,
@@ -297,9 +296,9 @@ class DuplexOutgoingSession implements SyncSession, EventListener {
 
 	private class WriteBatch implements ThrowingRunnable<IOException> {
 
-		private final Collection<Message> batch;
+		private final Collection<byte[]> batch;
 
-		private WriteBatch(Collection<Message> batch) {
+		private WriteBatch(Collection<byte[]> batch) {
 			this.batch = batch;
 		}
 
@@ -307,7 +306,7 @@ class DuplexOutgoingSession implements SyncSession, EventListener {
 		@Override
 		public void run() throws IOException {
 			if (interrupted) return;
-			for (Message m : batch) recordWriter.writeMessage(m);
+			for (byte[] raw : batch) recordWriter.writeMessage(raw);
 			LOG.info("Sent batch");
 			generateBatch();
 		}

bramble-core/src/main/java/org/briarproject/bramble/sync/MessageFactoryImpl.java

@@ -39,7 +39,11 @@ class MessageFactoryImpl implements MessageFactory {
 		if (body.length > MAX_MESSAGE_BODY_LENGTH)
 			throw new IllegalArgumentException();
 		MessageId id = getMessageId(g, timestamp, body);
-		return new Message(id, g, timestamp, body);
+		byte[] raw = new byte[MESSAGE_HEADER_LENGTH + body.length];
+		System.arraycopy(g.getBytes(), 0, raw, 0, UniqueId.LENGTH);
+		ByteUtils.writeUint64(timestamp, raw, UniqueId.LENGTH);
+		System.arraycopy(body, 0, raw, MESSAGE_HEADER_LENGTH, body.length);
+		return new Message(id, g, timestamp, raw);
 	}
 
 	private MessageId getMessageId(GroupId g, long timestamp, byte[] body) {
@@ -65,16 +69,18 @@ class MessageFactoryImpl implements MessageFactory {
 		byte[] body = new byte[raw.length - MESSAGE_HEADER_LENGTH];
 		System.arraycopy(raw, MESSAGE_HEADER_LENGTH, body, 0, body.length);
 		MessageId id = getMessageId(g, timestamp, body);
-		return new Message(id, g, timestamp, body);
+		return new Message(id, g, timestamp, raw);
 	}
 
 	@Override
-	public byte[] getRawMessage(Message m) {
-		byte[] body = m.getBody();
-		byte[] raw = new byte[MESSAGE_HEADER_LENGTH + body.length];
-		System.arraycopy(m.getGroupId().getBytes(), 0, raw, 0, UniqueId.LENGTH);
-		ByteUtils.writeUint64(m.getTimestamp(), raw, UniqueId.LENGTH);
-		System.arraycopy(body, 0, raw, MESSAGE_HEADER_LENGTH, body.length);
-		return raw;
+	public Message createMessage(MessageId m, byte[] raw) {
+		if (raw.length < MESSAGE_HEADER_LENGTH)
+			throw new IllegalArgumentException();
+		if (raw.length > MAX_MESSAGE_LENGTH)
+			throw new IllegalArgumentException();
+		byte[] groupId = new byte[UniqueId.LENGTH];
+		System.arraycopy(raw, 0, groupId, 0, UniqueId.LENGTH);
+		long timestamp = ByteUtils.readUint64(raw, UniqueId.LENGTH);
+		return new Message(m, new GroupId(groupId), timestamp, raw);
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/sync/SimplexOutgoingSession.java

@@ -13,7 +13,6 @@ import org.briarproject.bramble.api.lifecycle.IoExecutor;
 import org.briarproject.bramble.api.lifecycle.event.LifecycleEvent;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.Ack;
-import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.SyncRecordWriter;
 import org.briarproject.bramble.api.sync.SyncSession;
 import org.briarproject.bramble.api.transport.StreamWriter;
@@ -172,7 +171,7 @@ class SimplexOutgoingSession implements SyncSession, EventListener {
 		public void run() {
 			if (interrupted) return;
 			try {
-				Collection<Message> b;
+				Collection<byte[]> b;
 				Transaction txn = db.startTransaction(false);
 				try {
 					b = db.generateBatch(txn, contactId,
@@ -194,9 +193,9 @@ class SimplexOutgoingSession implements SyncSession, EventListener {
 
 	private class WriteBatch implements ThrowingRunnable<IOException> {
 
-		private final Collection<Message> batch;
+		private final Collection<byte[]> batch;
 
-		private WriteBatch(Collection<Message> batch) {
+		private WriteBatch(Collection<byte[]> batch) {
 			this.batch = batch;
 		}
 
@@ -204,7 +203,7 @@ class SimplexOutgoingSession implements SyncSession, EventListener {
 		@Override
 		public void run() throws IOException {
 			if (interrupted) return;
-			for (Message m : batch) recordWriter.writeMessage(m);
+			for (byte[] raw : batch) recordWriter.writeMessage(raw);
 			LOG.info("Sent batch");
 			dbExecutor.execute(new GenerateBatch());
 		}

bramble-core/src/main/java/org/briarproject/bramble/sync/SyncRecordWriterFactoryImpl.java

@@ -3,7 +3,6 @@ package org.briarproject.bramble.sync;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.record.RecordWriter;
 import org.briarproject.bramble.api.record.RecordWriterFactory;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.sync.SyncRecordWriter;
 import org.briarproject.bramble.api.sync.SyncRecordWriterFactory;
 
@@ -14,19 +13,16 @@ import javax.inject.Inject;
 @NotNullByDefault
 class SyncRecordWriterFactoryImpl implements SyncRecordWriterFactory {
 
-	private final MessageFactory messageFactory;
 	private final RecordWriterFactory recordWriterFactory;
 
 	@Inject
-	SyncRecordWriterFactoryImpl(MessageFactory messageFactory,
-			RecordWriterFactory recordWriterFactory) {
-		this.messageFactory = messageFactory;
+	SyncRecordWriterFactoryImpl(RecordWriterFactory recordWriterFactory) {
 		this.recordWriterFactory = recordWriterFactory;
 	}
 
 	@Override
 	public SyncRecordWriter createRecordWriter(OutputStream out) {
 		RecordWriter writer = recordWriterFactory.createRecordWriter(out);
-		return new SyncRecordWriterImpl(messageFactory, writer);
+		return new SyncRecordWriterImpl(writer);
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/sync/SyncRecordWriterImpl.java

@@ -4,8 +4,6 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.record.Record;
 import org.briarproject.bramble.api.record.RecordWriter;
 import org.briarproject.bramble.api.sync.Ack;
-import org.briarproject.bramble.api.sync.Message;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.Offer;
 import org.briarproject.bramble.api.sync.Request;
@@ -26,12 +24,10 @@ import static org.briarproject.bramble.api.sync.SyncConstants.PROTOCOL_VERSION;
 @NotNullByDefault
 class SyncRecordWriterImpl implements SyncRecordWriter {
 
-	private final MessageFactory messageFactory;
 	private final RecordWriter writer;
 	private final ByteArrayOutputStream payload = new ByteArrayOutputStream();
 
-	SyncRecordWriterImpl(MessageFactory messageFactory, RecordWriter writer) {
-		this.messageFactory = messageFactory;
+	SyncRecordWriterImpl(RecordWriter writer) {
 		this.writer = writer;
 	}
 
@@ -48,8 +44,7 @@ class SyncRecordWriterImpl implements SyncRecordWriter {
 	}
 
 	@Override
-	public void writeMessage(Message m) throws IOException {
-		byte[] raw = messageFactory.getRawMessage(m);
+	public void writeMessage(byte[] raw) throws IOException {
 		writer.writeRecord(new Record(PROTOCOL_VERSION, MESSAGE, raw));
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/sync/ValidationManagerImpl.java

@@ -16,6 +16,7 @@ import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.InvalidMessageException;
 import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.MessageContext;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.ValidationManager;
 import org.briarproject.bramble.api.sync.event.MessageAddedEvent;
@@ -51,6 +52,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 
 	private final DatabaseComponent db;
 	private final Executor dbExecutor, validationExecutor;
+	private final MessageFactory messageFactory;
 	private final Map<ClientMajorVersion, MessageValidator> validators;
 	private final Map<ClientMajorVersion, IncomingMessageHook> hooks;
 	private final AtomicBoolean used = new AtomicBoolean(false);
@@ -58,10 +60,12 @@ class ValidationManagerImpl implements ValidationManager, Service,
 	@Inject
 	ValidationManagerImpl(DatabaseComponent db,
 			@DatabaseExecutor Executor dbExecutor,
-			@ValidationExecutor Executor validationExecutor) {
+			@ValidationExecutor Executor validationExecutor,
+			MessageFactory messageFactory) {
 		this.db = db;
 		this.dbExecutor = dbExecutor;
 		this.validationExecutor = validationExecutor;
+		this.messageFactory = messageFactory;
 		validators = new ConcurrentHashMap<>();
 		hooks = new ConcurrentHashMap<>();
 	}
@@ -124,7 +128,9 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			Transaction txn = db.startTransaction(true);
 			try {
 				MessageId id = unvalidated.poll();
-				m = db.getMessage(txn, id);
+				byte[] raw = db.getRawMessage(txn, id);
+				if (raw == null) throw new DbException();
+				m = messageFactory.createMessage(id, raw);
 				g = db.getGroup(txn, m.getGroupId());
 				db.commitTransaction(txn);
 			} finally {
@@ -191,7 +197,9 @@ class ValidationManagerImpl implements ValidationManager, Service,
 						invalidateMessage(txn, id);
 						invalidate = getDependentsToInvalidate(txn, id);
 					} else if (allDelivered) {
-						Message m = db.getMessage(txn, id);
+						byte[] raw = db.getRawMessage(txn, id);
+						if (raw == null) throw new DbException();
+						Message m = messageFactory.createMessage(id, raw);
 						Group g = db.getGroup(txn, m.getGroupId());
 						ClientId c = g.getClientId();
 						int majorVersion = g.getMajorVersion();

bramble-core/src/main/java/org/briarproject/bramble/system/AbstractSecureRandomProvider.java

@@ -7,15 +7,13 @@ import java.io.DataOutputStream;
 import java.io.IOException;
 import java.net.InetAddress;
 import java.net.NetworkInterface;
-import java.util.Enumeration;
+import java.util.Collections;
+import java.util.List;
 import java.util.Map.Entry;
 import java.util.Properties;
 
 import javax.annotation.concurrent.Immutable;
 
-import static java.net.NetworkInterface.getNetworkInterfaces;
-import static java.util.Collections.list;
-
 @Immutable
 @NotNullByDefault
 abstract class AbstractSecureRandomProvider implements SecureRandomProvider {
@@ -25,14 +23,13 @@ abstract class AbstractSecureRandomProvider implements SecureRandomProvider {
 		out.writeLong(System.currentTimeMillis());
 		out.writeLong(System.nanoTime());
 		out.writeLong(Runtime.getRuntime().freeMemory());
-		Enumeration<NetworkInterface> ifaces = getNetworkInterfaces();
-		if (ifaces != null) {
-			for (NetworkInterface i : list(ifaces)) {
-				for (InetAddress a : list(i.getInetAddresses()))
-					out.write(a.getAddress());
-				byte[] hardware = i.getHardwareAddress();
-				if (hardware != null) out.write(hardware);
-			}
+		List<NetworkInterface> ifaces =
+				Collections.list(NetworkInterface.getNetworkInterfaces());
+		for (NetworkInterface i : ifaces) {
+			List<InetAddress> addrs = Collections.list(i.getInetAddresses());
+			for (InetAddress a : addrs) out.write(a.getAddress());
+			byte[] hardware = i.getHardwareAddress();
+			if (hardware != null) out.write(hardware);
 		}
 		for (Entry<String, String> e : System.getenv().entrySet()) {
 			out.writeUTF(e.getKey());

bramble-core/src/main/java/org/briarproject/bramble/versioning/ClientVersioningManagerImpl.java

@@ -139,7 +139,7 @@ class ClientVersioningManagerImpl implements ClientVersioningManager, Client,
 	}
 
 	@Override
-	public void stopService() {
+	public void stopService() throws ServiceException {
 	}
 
 	@Override
@@ -274,7 +274,9 @@ class ClientVersioningManagerImpl implements ClientVersioningManager, Client,
 	private List<ClientVersion> loadClientVersions(Transaction txn,
 			MessageId m) throws DbException {
 		try {
-			return parseClientVersions(clientHelper.getMessageAsList(txn, m));
+			BdfList body = clientHelper.getMessageAsList(txn, m);
+			if (body == null) throw new DbException();
+			return parseClientVersions(body);
 		} catch (FormatException e) {
 			throw new DbException(e);
 		}
@@ -357,7 +359,9 @@ class ClientVersioningManagerImpl implements ClientVersioningManager, Client,
 
 	private Update loadUpdate(Transaction txn, MessageId m) throws DbException {
 		try {
-			return parseUpdate(clientHelper.getMessageAsList(txn, m));
+			BdfList body = clientHelper.getMessageAsList(txn, m);
+			if (body == null) throw new DbException();
+			return parseUpdate(body);
 		} catch (FormatException e) {
 			throw new DbException(e);
 		}

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

@@ -16,8 +16,8 @@ import org.jmock.Expectations;
 import org.jmock.lib.legacy.ClassImposteriser;
 import org.junit.Test;
 
+import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 import static org.briarproject.bramble.api.transport.TransportConstants.MAX_CLOCK_DIFFERENCE;
-import static org.briarproject.bramble.test.TestUtils.getMessage;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertSame;
 
@@ -28,7 +28,8 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 			new BdfMessageValidator(clientHelper, metadataEncoder, clock) {
 				@Override
 				protected BdfMessageContext validateMessage(Message m, Group g,
-						BdfList body) {
+						BdfList body)
+						throws InvalidMessageException, FormatException {
 					throw new AssertionError();
 				}
 			};
@@ -56,7 +57,8 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 		context.checking(new Expectations() {{
 			oneOf(clock).currentTimeMillis();
 			will(returnValue(timestamp - MAX_CLOCK_DIFFERENCE));
-			oneOf(clientHelper).toList(message.getBody());
+			oneOf(clientHelper).toList(raw, MESSAGE_HEADER_LENGTH,
+					raw.length - MESSAGE_HEADER_LENGTH);
 			will(returnValue(body));
 			oneOf(metadataEncoder).encode(dictionary);
 			will(returnValue(meta));
@@ -67,7 +69,7 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 				metadataEncoder, clock) {
 			@Override
 			protected BdfMessageContext validateMessage(Message m, Group g,
-					BdfList b) {
+					BdfList b) throws InvalidMessageException, FormatException {
 				assertSame(message, m);
 				assertSame(group, g);
 				assertSame(body, b);
@@ -81,11 +83,17 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 
 	@Test(expected = InvalidMessageException.class)
 	public void testRejectsTooShortMessage() throws Exception {
-		Message invalidMessage = getMessage(groupId, 0);
+		byte[] invalidRaw = new byte[MESSAGE_HEADER_LENGTH];
+		// Use a mock message so the length of the raw message can be invalid
+		Message invalidMessage = context.mock(Message.class);
 
 		context.checking(new Expectations() {{
+			oneOf(invalidMessage).getTimestamp();
+			will(returnValue(timestamp));
 			oneOf(clock).currentTimeMillis();
 			will(returnValue(timestamp));
+			oneOf(invalidMessage).getRaw();
+			will(returnValue(invalidRaw));
 		}});
 
 		failIfSubclassIsCalled.validateMessage(invalidMessage, group);
@@ -93,12 +101,15 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 
 	@Test
 	public void testAcceptsMinLengthMessage() throws Exception {
-		Message shortMessage = getMessage(groupId, 1);
+		byte[] shortRaw = new byte[MESSAGE_HEADER_LENGTH + 1];
+		Message shortMessage =
+				new Message(messageId, groupId, timestamp, shortRaw);
 
 		context.checking(new Expectations() {{
 			oneOf(clock).currentTimeMillis();
 			will(returnValue(timestamp));
-			oneOf(clientHelper).toList(shortMessage.getBody());
+			oneOf(clientHelper).toList(shortRaw, MESSAGE_HEADER_LENGTH,
+					shortRaw.length - MESSAGE_HEADER_LENGTH);
 			will(returnValue(body));
 			oneOf(metadataEncoder).encode(dictionary);
 			will(returnValue(meta));
@@ -109,7 +120,7 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 				metadataEncoder, clock) {
 			@Override
 			protected BdfMessageContext validateMessage(Message m, Group g,
-					BdfList b) {
+					BdfList b) throws InvalidMessageException, FormatException {
 				assertSame(shortMessage, m);
 				assertSame(group, g);
 				assertSame(body, b);
@@ -126,7 +137,8 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 		context.checking(new Expectations() {{
 			oneOf(clock).currentTimeMillis();
 			will(returnValue(timestamp));
-			oneOf(clientHelper).toList(message.getBody());
+			oneOf(clientHelper).toList(raw, MESSAGE_HEADER_LENGTH,
+					raw.length - MESSAGE_HEADER_LENGTH);
 			will(throwException(new FormatException()));
 		}});
 
@@ -138,7 +150,8 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 		context.checking(new Expectations() {{
 			oneOf(clock).currentTimeMillis();
 			will(returnValue(timestamp));
-			oneOf(clientHelper).toList(message.getBody());
+			oneOf(clientHelper).toList(raw, MESSAGE_HEADER_LENGTH,
+					raw.length - MESSAGE_HEADER_LENGTH);
 			will(returnValue(body));
 		}});
 
@@ -147,7 +160,7 @@ public class BdfMessageValidatorTest extends ValidatorTestCase {
 				metadataEncoder, clock) {
 			@Override
 			protected BdfMessageContext validateMessage(Message m, Group g,
-					BdfList b) throws FormatException {
+					BdfList b) throws InvalidMessageException, FormatException {
 				throw new FormatException();
 			}
 		};

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

@@ -39,7 +39,6 @@ import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_AUTHOR_N
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_PUBLIC_KEY_LENGTH;
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_SIGNATURE_LENGTH;
 import static org.briarproject.bramble.test.TestUtils.getAuthor;
-import static org.briarproject.bramble.test.TestUtils.getMessage;
 import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
 import static org.briarproject.bramble.test.TestUtils.getRandomId;
 import static org.briarproject.bramble.util.StringUtils.getRandomString;
@@ -68,9 +67,11 @@ public class ClientHelperImplTest extends BrambleTestCase {
 
 	private final GroupId groupId = new GroupId(getRandomId());
 	private final BdfDictionary dictionary = new BdfDictionary();
-	private final Message message = getMessage(groupId);
-	private final MessageId messageId = message.getId();
-	private final long timestamp = message.getTimestamp();
+	private final long timestamp = 42L;
+	private final byte[] rawMessage = getRandomBytes(42);
+	private final MessageId messageId = new MessageId(getRandomId());
+	private final Message message =
+			new Message(messageId, groupId, timestamp, rawMessage);
 	private final Metadata metadata = new Metadata();
 	private final BdfList list = BdfList.of("Sign this!", getRandomBytes(42));
 	private final String label = StringUtils.getRandomString(5);
@@ -119,8 +120,8 @@ public class ClientHelperImplTest extends BrambleTestCase {
 		context.checking(new Expectations() {{
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn));
-			oneOf(db).getMessage(txn, messageId);
-			will(returnValue(message));
+			oneOf(db).getRawMessage(txn, messageId);
+			will(returnValue(rawMessage));
 			oneOf(db).commitTransaction(txn);
 			oneOf(db).endTransaction(txn);
 		}});
@@ -266,7 +267,7 @@ public class ClientHelperImplTest extends BrambleTestCase {
 	public void testToList() throws Exception {
 		expectToList(true);
 
-		assertEquals(list, clientHelper.toList(getRandomBytes(123)));
+		assertEquals(list, clientHelper.toList(rawMessage));
 		context.assertIsSatisfied();
 	}
 
@@ -275,7 +276,7 @@ public class ClientHelperImplTest extends BrambleTestCase {
 		expectToList(false); // no EOF after list
 
 		try {
-			clientHelper.toList(getRandomBytes(123));
+			clientHelper.toList(rawMessage);
 			fail();
 		} catch (FormatException e) {
 			// expected

bramble-core/src/test/java/org/briarproject/bramble/crypto/ScryptKdfTest.java

@@ -11,8 +11,6 @@ import java.util.HashSet;
 import java.util.Set;
 
 import static junit.framework.TestCase.assertTrue;
-
-import org.briarproject.bramble.test.ArrayClock;
 import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
 import static org.briarproject.bramble.util.StringUtils.getRandomString;
 import static org.junit.Assert.assertEquals;
@@ -76,4 +74,24 @@ public class ScryptKdfTest extends BrambleTestCase {
 		PasswordBasedKdf kdf = new ScryptKdf(clock);
 		assertEquals(256, kdf.chooseCostParameter());
 	}
+
+	private static class ArrayClock implements Clock {
+
+		private final long[] times;
+		private int index = 0;
+
+		private ArrayClock(long... times) {
+			this.times = times;
+		}
+
+		@Override
+		public long currentTimeMillis() {
+			return times[index++];
+		}
+
+		@Override
+		public void sleep(long milliseconds) throws InterruptedException {
+			Thread.sleep(milliseconds);
+		}
+	}
 }

bramble-core/src/test/java/org/briarproject/bramble/db/DatabaseComponentImplTest.java

@@ -64,7 +64,6 @@ import static java.util.Collections.singletonList;
 import static org.briarproject.bramble.api.sync.Group.Visibility.INVISIBLE;
 import static org.briarproject.bramble.api.sync.Group.Visibility.SHARED;
 import static org.briarproject.bramble.api.sync.Group.Visibility.VISIBLE;
-import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_LENGTH;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.DELIVERED;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.UNKNOWN;
 import static org.briarproject.bramble.api.transport.TransportConstants.REORDERING_WINDOW_SIZE;
@@ -73,7 +72,6 @@ import static org.briarproject.bramble.test.TestUtils.getAuthor;
 import static org.briarproject.bramble.test.TestUtils.getClientId;
 import static org.briarproject.bramble.test.TestUtils.getGroup;
 import static org.briarproject.bramble.test.TestUtils.getLocalAuthor;
-import static org.briarproject.bramble.test.TestUtils.getMessage;
 import static org.briarproject.bramble.test.TestUtils.getRandomId;
 import static org.briarproject.bramble.test.TestUtils.getSecretKey;
 import static org.briarproject.bramble.test.TestUtils.getTransportId;
@@ -99,8 +97,10 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 	private final Group group;
 	private final Author author;
 	private final LocalAuthor localAuthor;
-	private final Message message, message1;
 	private final MessageId messageId, messageId1;
+	private final int size;
+	private final byte[] raw;
+	private final Message message;
 	private final Metadata metadata;
 	private final TransportId transportId;
 	private final int maxLatency;
@@ -115,10 +115,12 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 		groupId = group.getId();
 		author = getAuthor();
 		localAuthor = getLocalAuthor();
-		message = getMessage(groupId);
-		message1 = getMessage(groupId);
-		messageId = message.getId();
-		messageId1 = message1.getId();
+		messageId = new MessageId(getRandomId());
+		messageId1 = new MessageId(getRandomId());
+		long timestamp = System.currentTimeMillis();
+		size = 1234;
+		raw = new byte[size];
+		message = new Message(messageId, groupId, timestamp, raw);
 		metadata = new Metadata();
 		metadata.put("foo", new byte[] {'b', 'a', 'r'});
 		transportId = getTransportId();
@@ -644,7 +646,7 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 
 		transaction = db.startTransaction(false);
 		try {
-			db.getMessage(transaction, messageId);
+			db.getRawMessage(transaction, messageId);
 			fail();
 		} catch (NoSuchMessageException expected) {
 			// Expected
@@ -863,23 +865,23 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 
 	@Test
 	public void testGenerateBatch() throws Exception {
+		byte[] raw1 = new byte[size];
 		Collection<MessageId> ids = Arrays.asList(messageId, messageId1);
-		Collection<Message> messages = Arrays.asList(message, message1);
+		Collection<byte[]> messages = Arrays.asList(raw, raw1);
 		context.checking(new Expectations() {{
 			oneOf(database).startTransaction();
 			will(returnValue(txn));
 			oneOf(database).containsContact(txn, contactId);
 			will(returnValue(true));
-			oneOf(database).getMessagesToSend(txn, contactId,
-					MAX_MESSAGE_LENGTH * 2, maxLatency);
+			oneOf(database).getMessagesToSend(txn, contactId, size * 2);
 			will(returnValue(ids));
-			oneOf(database).getMessage(txn, messageId);
-			will(returnValue(message));
-			oneOf(database).updateExpiryTimeAndEta(txn, contactId, messageId,
+			oneOf(database).getRawMessage(txn, messageId);
+			will(returnValue(raw));
+			oneOf(database).updateExpiryTime(txn, contactId, messageId,
 					maxLatency);
-			oneOf(database).getMessage(txn, messageId1);
-			will(returnValue(message1));
-			oneOf(database).updateExpiryTimeAndEta(txn, contactId, messageId1,
+			oneOf(database).getRawMessage(txn, messageId1);
+			will(returnValue(raw1));
+			oneOf(database).updateExpiryTime(txn, contactId, messageId1,
 					maxLatency);
 			oneOf(database).lowerRequestedFlag(txn, contactId, ids);
 			oneOf(database).commitTransaction(txn);
@@ -891,7 +893,7 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 		Transaction transaction = db.startTransaction(false);
 		try {
 			assertEquals(messages, db.generateBatch(transaction, contactId,
-					MAX_MESSAGE_LENGTH * 2, maxLatency));
+					size * 2, maxLatency));
 			db.commitTransaction(transaction);
 		} finally {
 			db.endTransaction(transaction);
@@ -907,11 +909,11 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 			will(returnValue(txn));
 			oneOf(database).containsContact(txn, contactId);
 			will(returnValue(true));
-			oneOf(database).getMessagesToOffer(txn, contactId, 123, maxLatency);
+			oneOf(database).getMessagesToOffer(txn, contactId, 123);
 			will(returnValue(ids));
-			oneOf(database).updateExpiryTimeAndEta(txn, contactId, messageId,
+			oneOf(database).updateExpiryTime(txn, contactId, messageId,
 					maxLatency);
-			oneOf(database).updateExpiryTimeAndEta(txn, contactId, messageId1,
+			oneOf(database).updateExpiryTime(txn, contactId, messageId1,
 					maxLatency);
 			oneOf(database).commitTransaction(txn);
 		}});
@@ -959,23 +961,24 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 
 	@Test
 	public void testGenerateRequestedBatch() throws Exception {
+		byte[] raw1 = new byte[size];
 		Collection<MessageId> ids = Arrays.asList(messageId, messageId1);
-		Collection<Message> messages = Arrays.asList(message, message1);
+		Collection<byte[]> messages = Arrays.asList(raw, raw1);
 		context.checking(new Expectations() {{
 			oneOf(database).startTransaction();
 			will(returnValue(txn));
 			oneOf(database).containsContact(txn, contactId);
 			will(returnValue(true));
 			oneOf(database).getRequestedMessagesToSend(txn, contactId,
-					MAX_MESSAGE_LENGTH * 2, maxLatency);
+					size * 2);
 			will(returnValue(ids));
-			oneOf(database).getMessage(txn, messageId);
-			will(returnValue(message));
-			oneOf(database).updateExpiryTimeAndEta(txn, contactId, messageId,
+			oneOf(database).getRawMessage(txn, messageId);
+			will(returnValue(raw));
+			oneOf(database).updateExpiryTime(txn, contactId, messageId,
 					maxLatency);
-			oneOf(database).getMessage(txn, messageId1);
-			will(returnValue(message1));
-			oneOf(database).updateExpiryTimeAndEta(txn, contactId, messageId1,
+			oneOf(database).getRawMessage(txn, messageId1);
+			will(returnValue(raw1));
+			oneOf(database).updateExpiryTime(txn, contactId, messageId1,
 					maxLatency);
 			oneOf(database).lowerRequestedFlag(txn, contactId, ids);
 			oneOf(database).commitTransaction(txn);
@@ -987,7 +990,7 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 		Transaction transaction = db.startTransaction(false);
 		try {
 			assertEquals(messages, db.generateRequestedBatch(transaction,
-					contactId, MAX_MESSAGE_LENGTH * 2, maxLatency));
+					contactId, size * 2, maxLatency));
 			db.commitTransaction(transaction);
 		} finally {
 			db.endTransaction(transaction);

bramble-core/src/test/java/org/briarproject/bramble/db/DatabaseMigrationTest.java

@@ -7,12 +7,10 @@ import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.settings.Settings;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.system.SystemClock;
 import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.briarproject.bramble.test.TestDatabaseConfig;
-import org.briarproject.bramble.test.TestMessageFactory;
 import org.briarproject.bramble.test.TestUtils;
 import org.jmock.Expectations;
 import org.junit.After;
@@ -47,7 +45,6 @@ public abstract class DatabaseMigrationTest extends BrambleMockTestCase {
 
 	protected final DatabaseConfig config =
 			new TestDatabaseConfig(testDir, 1024 * 1024);
-	protected final MessageFactory messageFactory = new TestMessageFactory();
 	protected final SecretKey key = getSecretKey();
 	protected final Clock clock = new SystemClock();
 

bramble-core/src/test/java/org/briarproject/bramble/db/DatabasePerformanceComparisonTest.java

@@ -1,13 +1,10 @@
 package org.briarproject.bramble.db;
 
-import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.system.SystemClock;
 import org.briarproject.bramble.test.TestDatabaseConfig;
-import org.briarproject.bramble.test.TestMessageFactory;
 import org.briarproject.bramble.test.UTest;
 
 import java.io.IOException;
@@ -29,11 +26,9 @@ public abstract class DatabasePerformanceComparisonTest
 	 * How many blocks of each condition to compare.
 	 */
 	private static final int COMPARISON_BLOCKS = 10;
-	private SecretKey databaseKey = getSecretKey();
 
 	abstract Database<Connection> createDatabase(boolean conditionA,
-			DatabaseConfig databaseConfig, MessageFactory messageFactory,
-			Clock clock);
+			DatabaseConfig databaseConfig, Clock clock);
 
 	@Override
 	protected void benchmark(String name,
@@ -76,9 +71,8 @@ public abstract class DatabasePerformanceComparisonTest
 	private Database<Connection> openDatabase(boolean conditionA)
 			throws DbException {
 		Database<Connection> db = createDatabase(conditionA,
-				new TestDatabaseConfig(testDir, MAX_SIZE),
-				new TestMessageFactory(), new SystemClock());
-		db.open(databaseKey, null);
+				new TestDatabaseConfig(testDir, MAX_SIZE), new SystemClock());
+		db.open(getSecretKey(), null);
 		return db;
 	}
 

bramble-core/src/test/java/org/briarproject/bramble/db/DatabasePerformanceTest.java

@@ -96,9 +96,6 @@ public abstract class DatabasePerformanceTest extends BrambleTestCase {
 	 */
 	private static final int STEADY_STATE_BLOCKS = 5;
 
-	// All our transports use a maximum latency of 30 seconds
-	private static final int MAX_LATENCY = 30 * 1000;
-
 	protected final File testDir = getTestDirectory();
 	private final File resultsFile = new File(getTestName() + ".tsv");
 	protected final Random random = new Random();
@@ -451,7 +448,7 @@ public abstract class DatabasePerformanceTest extends BrambleTestCase {
 		benchmark(name, db -> {
 			Connection txn = db.startTransaction();
 			db.getMessagesToOffer(txn, pickRandom(contacts).getId(),
-					MAX_MESSAGE_IDS, MAX_LATENCY);
+					MAX_MESSAGE_IDS);
 			db.commitTransaction(txn);
 		});
 	}
@@ -473,7 +470,7 @@ public abstract class DatabasePerformanceTest extends BrambleTestCase {
 		benchmark(name, db -> {
 			Connection txn = db.startTransaction();
 			db.getMessagesToSend(txn, pickRandom(contacts).getId(),
-					MAX_MESSAGE_IDS, MAX_LATENCY);
+					MAX_MESSAGE_IDS);
 			db.commitTransaction(txn);
 		});
 	}
@@ -509,11 +506,11 @@ public abstract class DatabasePerformanceTest extends BrambleTestCase {
 	}
 
 	@Test
-	public void testGetMessage() throws Exception {
-		String name = "getMessage(T, MessageId)";
+	public void testGetRawMessage() throws Exception {
+		String name = "getRawMessage(T, MessageId)";
 		benchmark(name, db -> {
 			Connection txn = db.startTransaction();
-			db.getMessage(txn, pickRandom(messages).getId());
+			db.getRawMessage(txn, pickRandom(messages).getId());
 			db.commitTransaction(txn);
 		});
 	}
@@ -524,7 +521,7 @@ public abstract class DatabasePerformanceTest extends BrambleTestCase {
 		benchmark(name, db -> {
 			Connection txn = db.startTransaction();
 			db.getRequestedMessagesToSend(txn, pickRandom(contacts).getId(),
-					MAX_MESSAGE_IDS, MAX_LATENCY);
+					MAX_MESSAGE_IDS);
 			db.commitTransaction(txn);
 		});
 	}

bramble-core/src/test/java/org/briarproject/bramble/db/DatabaseTraceTest.java

@@ -1,13 +1,10 @@
 package org.briarproject.bramble.db;
 
-import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.system.SystemClock;
 import org.briarproject.bramble.test.TestDatabaseConfig;
-import org.briarproject.bramble.test.TestMessageFactory;
 import org.briarproject.bramble.util.IoUtils;
 
 import java.io.File;
@@ -23,10 +20,8 @@ import static org.briarproject.bramble.test.TestUtils.getSecretKey;
 
 public abstract class DatabaseTraceTest extends DatabasePerformanceTest {
 
-	private SecretKey databaseKey = getSecretKey();
-
 	abstract Database<Connection> createDatabase(DatabaseConfig databaseConfig,
-			MessageFactory messageFactory, Clock clock);
+			Clock clock);
 
 	@Nullable
 	protected abstract File getTraceFile();
@@ -48,9 +43,8 @@ public abstract class DatabaseTraceTest extends DatabasePerformanceTest {
 
 	private Database<Connection> openDatabase() throws DbException {
 		Database<Connection> db = createDatabase(
-				new TestDatabaseConfig(testDir, MAX_SIZE),
-				new TestMessageFactory(), new SystemClock());
-		db.open(databaseKey, null);
+				new TestDatabaseConfig(testDir, MAX_SIZE), new SystemClock());
+		db.open(getSecretKey(), null);
 		return db;
 	}
 

bramble-core/src/test/java/org/briarproject/bramble/db/H2DatabasePerformanceTest.java

@@ -1,7 +1,6 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.junit.Ignore;
 
@@ -14,8 +13,7 @@ public class H2DatabasePerformanceTest extends SingleDatabasePerformanceTest {
 	}
 
 	@Override
-	protected JdbcDatabase createDatabase(DatabaseConfig config,
-			MessageFactory messageFactory, Clock clock) {
-		return new H2Database(config, messageFactory, clock);
+	protected JdbcDatabase createDatabase(DatabaseConfig config, Clock clock) {
+		return new H2Database(config, clock);
 	}
 }

bramble-core/src/test/java/org/briarproject/bramble/db/H2DatabaseTest.java

@@ -1,14 +1,16 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 
 public class H2DatabaseTest extends JdbcDatabaseTest {
 
+	public H2DatabaseTest() throws Exception {
+		super();
+	}
+
 	@Override
-	protected JdbcDatabase createDatabase(DatabaseConfig config,
-			MessageFactory messageFactory, Clock clock) {
-		return new H2Database(config, messageFactory, clock);
+	protected JdbcDatabase createDatabase(DatabaseConfig config, Clock clock) {
+		return new H2Database(config, clock);
 	}
 }

bramble-core/src/test/java/org/briarproject/bramble/db/H2DatabaseTraceTest.java

@@ -1,7 +1,6 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.junit.Ignore;
 
@@ -15,8 +14,8 @@ public class H2DatabaseTraceTest extends DatabaseTraceTest {
 
 	@Override
 	Database<Connection> createDatabase(DatabaseConfig databaseConfig,
-			MessageFactory messageFactory, Clock clock) {
-		return new H2Database(databaseConfig, messageFactory, clock) {
+			Clock clock) {
+		return new H2Database(databaseConfig, clock) {
 			@Override
 			@Nonnull
 			String getUrl() {

bramble-core/src/test/java/org/briarproject/bramble/db/H2HyperSqlDatabasePerformanceComparisonTest.java

@@ -1,7 +1,6 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.junit.Ignore;
 
@@ -13,11 +12,9 @@ public class H2HyperSqlDatabasePerformanceComparisonTest
 
 	@Override
 	Database<Connection> createDatabase(boolean conditionA,
-			DatabaseConfig databaseConfig, MessageFactory messageFactory,
-			Clock clock) {
-		if (conditionA)
-			return new H2Database(databaseConfig, messageFactory, clock);
-		else return new HyperSqlDatabase(databaseConfig, messageFactory, clock);
+			DatabaseConfig databaseConfig, Clock clock) {
+		if (conditionA) return new H2Database(databaseConfig, clock);
+		else return new HyperSqlDatabase(databaseConfig, clock);
 	}
 
 	@Override

bramble-core/src/test/java/org/briarproject/bramble/db/H2MigrationTest.java

@@ -11,7 +11,7 @@ public class H2MigrationTest extends DatabaseMigrationTest {
 	@Override
 	Database<Connection> createDatabase(
 			List<Migration<Connection>> migrations) {
-		return new H2Database(config, messageFactory, clock) {
+		return new H2Database(config, clock) {
 			@Override
 			List<Migration<Connection>> getMigrations() {
 				return migrations;

bramble-core/src/test/java/org/briarproject/bramble/db/H2SelfDatabasePerformanceComparisonTest.java

@@ -1,7 +1,6 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.junit.Ignore;
 
@@ -18,9 +17,8 @@ public class H2SelfDatabasePerformanceComparisonTest
 
 	@Override
 	Database<Connection> createDatabase(boolean conditionA,
-			DatabaseConfig databaseConfig, MessageFactory messageFactory,
-			Clock clock) {
-		return new H2Database(databaseConfig, messageFactory, clock);
+			DatabaseConfig databaseConfig, Clock clock) {
+		return new H2Database(databaseConfig, clock);
 	}
 
 	@Override

bramble-core/src/test/java/org/briarproject/bramble/db/H2SleepDatabasePerformanceComparisonTest.java

@@ -3,7 +3,6 @@ package org.briarproject.bramble.db;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.junit.Ignore;
 
@@ -20,12 +19,11 @@ public class H2SleepDatabasePerformanceComparisonTest
 
 	@Override
 	Database<Connection> createDatabase(boolean conditionA,
-			DatabaseConfig databaseConfig, MessageFactory messageFactory,
-			Clock clock) {
+			DatabaseConfig databaseConfig, Clock clock) {
 		if (conditionA) {
-			return new H2Database(databaseConfig, messageFactory, clock);
+			return new H2Database(databaseConfig, clock);
 		} else {
-			return new H2Database(databaseConfig, messageFactory, clock) {
+			return new H2Database(databaseConfig, clock) {
 				@Override
 				@NotNullByDefault
 				public void commitTransaction(Connection txn)

bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlDatabasePerformanceTest.java

@@ -1,7 +1,6 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.junit.Ignore;
 
@@ -15,8 +14,7 @@ public class HyperSqlDatabasePerformanceTest
 	}
 
 	@Override
-	protected JdbcDatabase createDatabase(DatabaseConfig config,
-			MessageFactory messageFactory, Clock clock) {
-		return new HyperSqlDatabase(config, messageFactory, clock);
+	protected JdbcDatabase createDatabase(DatabaseConfig config, Clock clock) {
+		return new HyperSqlDatabase(config, clock);
 	}
 }

bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlDatabaseTest.java

@@ -1,14 +1,16 @@
 package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.db.DatabaseConfig;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 
 public class HyperSqlDatabaseTest extends JdbcDatabaseTest {
 
+	public HyperSqlDatabaseTest() throws Exception {
+		super();
+	}
+
 	@Override
-	protected JdbcDatabase createDatabase(DatabaseConfig config,
-			MessageFactory messageFactory, Clock clock) {
-		return new HyperSqlDatabase(config, messageFactory ,clock);
+	protected JdbcDatabase createDatabase(DatabaseConfig config, Clock clock) {
+		return new HyperSqlDatabase(config, clock);
 	}
 }

bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlMigrationTest.java

@@ -9,9 +9,9 @@ import java.util.List;
 public class HyperSqlMigrationTest extends DatabaseMigrationTest {
 
 	@Override
-	Database<Connection> createDatabase(
-			List<Migration<Connection>> migrations) {
-		return new HyperSqlDatabase(config, messageFactory, clock) {
+	Database<Connection> createDatabase(List<Migration<Connection>> migrations)
+			throws Exception {
+		return new HyperSqlDatabase(config, clock) {
 			@Override
 			List<Migration<Connection>> getMigrations() {
 				return migrations;

bramble-core/src/test/java/org/briarproject/bramble/db/JdbcDatabaseTest.java

@@ -5,7 +5,6 @@ import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.db.MessageDeletedException;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.LocalAuthor;
@@ -15,7 +14,6 @@ import org.briarproject.bramble.api.sync.ClientId;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.Message;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.MessageStatus;
 import org.briarproject.bramble.api.sync.ValidationManager.State;
@@ -26,10 +24,8 @@ import org.briarproject.bramble.api.transport.KeySetId;
 import org.briarproject.bramble.api.transport.OutgoingKeys;
 import org.briarproject.bramble.api.transport.TransportKeys;
 import org.briarproject.bramble.system.SystemClock;
-import org.briarproject.bramble.test.ArrayClock;
 import org.briarproject.bramble.test.BrambleTestCase;
 import org.briarproject.bramble.test.TestDatabaseConfig;
-import org.briarproject.bramble.test.TestMessageFactory;
 import org.briarproject.bramble.test.TestUtils;
 import org.junit.After;
 import org.junit.Before;
@@ -56,17 +52,16 @@ import static org.briarproject.bramble.api.db.Metadata.REMOVE;
 import static org.briarproject.bramble.api.sync.Group.Visibility.INVISIBLE;
 import static org.briarproject.bramble.api.sync.Group.Visibility.SHARED;
 import static org.briarproject.bramble.api.sync.Group.Visibility.VISIBLE;
-import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_BODY_LENGTH;
+import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_LENGTH;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.DELIVERED;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.INVALID;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.PENDING;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.UNKNOWN;
-import static org.briarproject.bramble.test.TestUtils.deleteTestDirectory;
 import static org.briarproject.bramble.test.TestUtils.getAuthor;
 import static org.briarproject.bramble.test.TestUtils.getClientId;
 import static org.briarproject.bramble.test.TestUtils.getGroup;
 import static org.briarproject.bramble.test.TestUtils.getLocalAuthor;
-import static org.briarproject.bramble.test.TestUtils.getMessage;
+import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
 import static org.briarproject.bramble.test.TestUtils.getRandomId;
 import static org.briarproject.bramble.test.TestUtils.getSecretKey;
 import static org.briarproject.bramble.test.TestUtils.getTestDirectory;
@@ -84,9 +79,6 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 	private static final int ONE_MEGABYTE = 1024 * 1024;
 	private static final int MAX_SIZE = 5 * ONE_MEGABYTE;
-	// All our transports use a maximum latency of 30 seconds
-	private static final int MAX_LATENCY = 30 * 1000;
-
 
 	private final SecretKey key = getSecretKey();
 	private final File testDir = getTestDirectory();
@@ -96,8 +88,11 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 	private final Group group;
 	private final Author author;
 	private final LocalAuthor localAuthor;
-	private final Message message;
 	private final MessageId messageId;
+	private final long timestamp;
+	private final int size;
+	private final byte[] raw;
+	private final Message message;
 	private final TransportId transportId;
 	private final ContactId contactId;
 	private final KeySetId keySetId, keySetId1;
@@ -110,8 +105,11 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		groupId = group.getId();
 		author = getAuthor();
 		localAuthor = getLocalAuthor();
-		message = getMessage(groupId);
-		messageId = message.getId();
+		messageId = new MessageId(getRandomId());
+		timestamp = System.currentTimeMillis();
+		size = 1234;
+		raw = getRandomBytes(size);
+		message = new Message(messageId, groupId, timestamp, raw);
 		transportId = getTransportId();
 		contactId = new ContactId(1);
 		keySetId = new KeySetId(1);
@@ -119,7 +117,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 	}
 
 	protected abstract JdbcDatabase createDatabase(DatabaseConfig config,
-			MessageFactory messageFactory, Clock clock);
+			Clock clock);
 
 	@Before
 	public void setUp() {
@@ -151,8 +149,8 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		assertTrue(db.containsContact(txn, contactId));
 		assertTrue(db.containsGroup(txn, groupId));
 		assertTrue(db.containsMessage(txn, messageId));
-		assertArrayEquals(message.getBody(),
-				db.getMessage(txn, messageId).getBody());
+		byte[] raw1 = db.getRawMessage(txn, messageId);
+		assertArrayEquals(raw, raw1);
 
 		// Delete the records
 		db.removeMessage(txn, messageId);
@@ -204,16 +202,16 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// The contact has not seen the message, so it should be sendable
 		Collection<MessageId> ids =
-				db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+				db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
 		assertEquals(singletonList(messageId), ids);
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertEquals(singletonList(messageId), ids);
 
 		// Changing the status to seen = true should make the message unsendable
 		db.raiseSeenFlag(txn, contactId, messageId);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertTrue(ids.isEmpty());
 
 		db.commitTransaction(txn);
@@ -235,30 +233,30 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// The message has not been validated, so it should not be sendable
 		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
-				ONE_MEGABYTE, MAX_LATENCY);
+				ONE_MEGABYTE);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertTrue(ids.isEmpty());
 
 		// Marking the message delivered should make it sendable
 		db.setMessageState(txn, messageId, DELIVERED);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
 		assertEquals(singletonList(messageId), ids);
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertEquals(singletonList(messageId), ids);
 
 		// Marking the message invalid should make it unsendable
 		db.setMessageState(txn, messageId, INVALID);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertTrue(ids.isEmpty());
 
 		// Marking the message pending should make it unsendable
 		db.setMessageState(txn, messageId, PENDING);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertTrue(ids.isEmpty());
 
 		db.commitTransaction(txn);
@@ -279,37 +277,37 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// The group is invisible, so the message should not be sendable
 		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
-				ONE_MEGABYTE, MAX_LATENCY);
+				ONE_MEGABYTE);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertTrue(ids.isEmpty());
 
 		// Making the group visible should not make the message sendable
 		db.addGroupVisibility(txn, contactId, groupId, false);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertTrue(ids.isEmpty());
 
 		// Sharing the group should make the message sendable
 		db.setGroupVisibility(txn, contactId, groupId, true);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
 		assertEquals(singletonList(messageId), ids);
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertEquals(singletonList(messageId), ids);
 
 		// Unsharing the group should make the message unsendable
 		db.setGroupVisibility(txn, contactId, groupId, false);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertTrue(ids.isEmpty());
 
 		// Making the group invisible should make the message unsendable
 		db.removeGroupVisibility(txn, contactId, groupId);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertTrue(ids.isEmpty());
 
 		db.commitTransaction(txn);
@@ -331,16 +329,16 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// The message is not shared, so it should not be sendable
 		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
-				ONE_MEGABYTE, MAX_LATENCY);
+				ONE_MEGABYTE);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertTrue(ids.isEmpty());
 
 		// Sharing the message should make it sendable
 		db.setMessageShared(txn, messageId);
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
 		assertEquals(singletonList(messageId), ids);
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertEquals(singletonList(messageId), ids);
 
 		db.commitTransaction(txn);
@@ -361,13 +359,12 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		db.addMessage(txn, message, DELIVERED, true, null);
 
 		// The message is sendable, but too large to send
-		Collection<MessageId> ids =
-				db.getMessagesToSend(txn, contactId, message.getRawLength() - 1,
-						MAX_LATENCY);
+		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
+				size - 1);
 		assertTrue(ids.isEmpty());
+
 		// The message is just the right size to send
-		ids = db.getMessagesToSend(txn, contactId, message.getRawLength(),
-				MAX_LATENCY);
+		ids = db.getMessagesToSend(txn, contactId, size);
 		assertEquals(singletonList(messageId), ids);
 
 		db.commitTransaction(txn);
@@ -387,8 +384,8 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		db.addGroupVisibility(txn, contactId, groupId, false);
 
 		// Add some messages to ack
-		Message message1 = getMessage(groupId);
-		MessageId messageId1 = message1.getId();
+		MessageId messageId1 = new MessageId(getRandomId());
+		Message message1 = new Message(messageId1, groupId, timestamp, raw);
 		db.addMessage(txn, message, DELIVERED, true, contactId);
 		db.addMessage(txn, message1, DELIVERED, true, contactId);
 
@@ -430,19 +427,19 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// Retrieve the message from the database and mark it as sent
 		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
-				ONE_MEGABYTE, MAX_LATENCY);
+				ONE_MEGABYTE);
 		assertEquals(singletonList(messageId), ids);
-		db.updateExpiryTimeAndEta(txn, contactId, messageId, MAX_LATENCY);
+		db.updateExpiryTime(txn, contactId, messageId, Integer.MAX_VALUE);
 
 		// The message should no longer be sendable
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
 		assertTrue(ids.isEmpty());
 
 		// Pretend that the message was acked
 		db.raiseSeenFlag(txn, contactId, messageId);
 
 		// The message still should not be sendable
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
 		assertTrue(ids.isEmpty());
 
 		db.commitTransaction(txn);
@@ -451,7 +448,9 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 	@Test
 	public void testGetFreeSpace() throws Exception {
-		Message message = getMessage(groupId, MAX_MESSAGE_BODY_LENGTH);
+		byte[] largeBody = new byte[MAX_MESSAGE_LENGTH];
+		for (int i = 0; i < largeBody.length; i++) largeBody[i] = (byte) i;
+		Message message = new Message(messageId, groupId, timestamp, largeBody);
 		Database<Connection> db = open(false);
 
 		// Sanity check: there should be enough space on disk for this test
@@ -1105,8 +1104,8 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 	@Test
 	public void testMetadataQueries() throws Exception {
-		Message message1 = getMessage(groupId);
-		MessageId messageId1 = message1.getId();
+		MessageId messageId1 = new MessageId(getRandomId());
+		Message message1 = new Message(messageId1, groupId, timestamp, raw);
 
 		Database<Connection> db = open(false);
 		Connection txn = db.startTransaction();
@@ -1209,8 +1208,8 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 	@Test
 	public void testMetadataQueriesOnlyForDeliveredMessages() throws Exception {
-		Message message1 = getMessage(groupId);
-		MessageId messageId1 = message1.getId();
+		MessageId messageId1 = new MessageId(getRandomId());
+		Message message1 = new Message(messageId1, groupId, timestamp, raw);
 
 		Database<Connection> db = open(false);
 		Connection txn = db.startTransaction();
@@ -1280,14 +1279,14 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 	@Test
 	public void testMessageDependencies() throws Exception {
-		Message message1 = getMessage(groupId);
-		Message message2 = getMessage(groupId);
-		Message message3 = getMessage(groupId);
-		Message message4 = getMessage(groupId);
-		MessageId messageId1 = message1.getId();
-		MessageId messageId2 = message2.getId();
-		MessageId messageId3 = message3.getId();
-		MessageId messageId4 = message4.getId();
+		MessageId messageId1 = new MessageId(getRandomId());
+		MessageId messageId2 = new MessageId(getRandomId());
+		MessageId messageId3 = new MessageId(getRandomId());
+		MessageId messageId4 = new MessageId(getRandomId());
+		Message message1 = new Message(messageId1, groupId, timestamp, raw);
+		Message message2 = new Message(messageId2, groupId, timestamp, raw);
+		Message message3 = new Message(messageId3, groupId, timestamp, raw);
+		Message message4 = new Message(messageId4, groupId, timestamp, raw);
 
 		Database<Connection> db = open(false);
 		Connection txn = db.startTransaction();
@@ -1385,16 +1384,16 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		db.addGroup(txn, group1);
 
 		// Add a message to the second group
-		Message message1 = getMessage(groupId1);
-		MessageId messageId1 = message1.getId();
+		MessageId messageId1 = new MessageId(getRandomId());
+		Message message1 = new Message(messageId1, groupId1, timestamp, raw);
 		db.addMessage(txn, message1, DELIVERED, true, contactId);
 
 		// Create an ID for a missing message
 		MessageId messageId2 = new MessageId(getRandomId());
 
 		// Add another message to the first group
-		Message message3 = getMessage(groupId);
-		MessageId messageId3 = message3.getId();
+		MessageId messageId3 = new MessageId(getRandomId());
+		Message message3 = new Message(messageId3, groupId, timestamp, raw);
 		db.addMessage(txn, message3, DELIVERED, true, contactId);
 
 		// Add dependencies between the messages
@@ -1428,32 +1427,36 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 	@Test
 	public void testGetPendingMessagesForDelivery() throws Exception {
-		Message message1 = getMessage(groupId);
-		Message message2 = getMessage(groupId);
-		Message message3 = getMessage(groupId);
-		Message message4 = getMessage(groupId);
+		MessageId mId1 = new MessageId(getRandomId());
+		MessageId mId2 = new MessageId(getRandomId());
+		MessageId mId3 = new MessageId(getRandomId());
+		MessageId mId4 = new MessageId(getRandomId());
+		Message m1 = new Message(mId1, groupId, timestamp, raw);
+		Message m2 = new Message(mId2, groupId, timestamp, raw);
+		Message m3 = new Message(mId3, groupId, timestamp, raw);
+		Message m4 = new Message(mId4, groupId, timestamp, raw);
 
 		Database<Connection> db = open(false);
 		Connection txn = db.startTransaction();
 
 		// Add a group and some messages with different states
 		db.addGroup(txn, group);
-		db.addMessage(txn, message1, UNKNOWN, true, contactId);
-		db.addMessage(txn, message2, INVALID, true, contactId);
-		db.addMessage(txn, message3, PENDING, true, contactId);
-		db.addMessage(txn, message4, DELIVERED, true, contactId);
+		db.addMessage(txn, m1, UNKNOWN, true, contactId);
+		db.addMessage(txn, m2, INVALID, true, contactId);
+		db.addMessage(txn, m3, PENDING, true, contactId);
+		db.addMessage(txn, m4, DELIVERED, true, contactId);
 
 		Collection<MessageId> result;
 
 		// Retrieve messages to be validated
 		result = db.getMessagesToValidate(txn);
 		assertEquals(1, result.size());
-		assertTrue(result.contains(message1.getId()));
+		assertTrue(result.contains(mId1));
 
 		// Retrieve pending messages
 		result = db.getPendingMessages(txn);
 		assertEquals(1, result.size());
-		assertTrue(result.contains(message3.getId()));
+		assertTrue(result.contains(mId3));
 
 		db.commitTransaction(txn);
 		db.close();
@@ -1461,31 +1464,35 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 	@Test
 	public void testGetMessagesToShare() throws Exception {
-		Message message1 = getMessage(groupId);
-		Message message2 = getMessage(groupId);
-		Message message3 = getMessage(groupId);
-		Message message4 = getMessage(groupId);
+		MessageId mId1 = new MessageId(getRandomId());
+		MessageId mId2 = new MessageId(getRandomId());
+		MessageId mId3 = new MessageId(getRandomId());
+		MessageId mId4 = new MessageId(getRandomId());
+		Message m1 = new Message(mId1, groupId, timestamp, raw);
+		Message m2 = new Message(mId2, groupId, timestamp, raw);
+		Message m3 = new Message(mId3, groupId, timestamp, raw);
+		Message m4 = new Message(mId4, groupId, timestamp, raw);
 
 		Database<Connection> db = open(false);
 		Connection txn = db.startTransaction();
 
 		// Add a group and some messages
 		db.addGroup(txn, group);
-		db.addMessage(txn, message1, DELIVERED, true, contactId);
-		db.addMessage(txn, message2, DELIVERED, false, contactId);
-		db.addMessage(txn, message3, DELIVERED, false, contactId);
-		db.addMessage(txn, message4, DELIVERED, true, contactId);
+		db.addMessage(txn, m1, DELIVERED, true, contactId);
+		db.addMessage(txn, m2, DELIVERED, false, contactId);
+		db.addMessage(txn, m3, DELIVERED, false, contactId);
+		db.addMessage(txn, m4, DELIVERED, true, contactId);
 
 		// Introduce dependencies between the messages
-		db.addMessageDependency(txn, message1, message2.getId(), DELIVERED);
-		db.addMessageDependency(txn, message3, message1.getId(), DELIVERED);
-		db.addMessageDependency(txn, message4, message3.getId(), DELIVERED);
+		db.addMessageDependency(txn, m1, mId2, DELIVERED);
+		db.addMessageDependency(txn, m3, mId1, DELIVERED);
+		db.addMessageDependency(txn, m4, mId3, DELIVERED);
 
 		// Retrieve messages to be shared
 		Collection<MessageId> result = db.getMessagesToShare(txn);
 		assertEquals(2, result.size());
-		assertTrue(result.contains(message2.getId()));
-		assertTrue(result.contains(message3.getId()));
+		assertTrue(result.contains(mId2));
+		assertTrue(result.contains(mId3));
 
 		db.commitTransaction(txn);
 		db.close();
@@ -1523,7 +1530,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		assertFalse(status.isSeen());
 
 		// Pretend the message was sent to the contact
-		db.updateExpiryTimeAndEta(txn, contactId, messageId, Integer.MAX_VALUE);
+		db.updateExpiryTime(txn, contactId, messageId, Integer.MAX_VALUE);
 
 		// The message should be sent but not seen
 		status = db.getMessageStatus(txn, contactId, messageId);
@@ -1642,17 +1649,13 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// The message should be sendable
 		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
-				ONE_MEGABYTE, MAX_LATENCY);
+				ONE_MEGABYTE);
 		assertEquals(singletonList(messageId), ids);
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertEquals(singletonList(messageId), ids);
 
-		// The message should be available
-		Message m = db.getMessage(txn, messageId);
-		assertEquals(messageId, m.getId());
-		assertEquals(groupId, m.getGroupId());
-		assertEquals(message.getTimestamp(), m.getTimestamp());
-		assertArrayEquals(message.getBody(), m.getBody());
+		// The raw message should not be null
+		assertNotNull(db.getRawMessage(txn, messageId));
 
 		// Delete the message
 		db.deleteMessage(txn, messageId);
@@ -1661,18 +1664,13 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		assertTrue(db.containsVisibleMessage(txn, contactId, messageId));
 
 		// The message should not be sendable
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
+		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE);
 		assertTrue(ids.isEmpty());
-		ids = db.getMessagesToOffer(txn, contactId, 100, MAX_LATENCY);
+		ids = db.getMessagesToOffer(txn, contactId, 100);
 		assertTrue(ids.isEmpty());
 
-		// Requesting the message should throw an exception
-		try {
-			db.getMessage(txn, messageId);
-			fail();
-		} catch (MessageDeletedException expected) {
-			// Expected
-		}
+		// The raw message should be null
+		assertNull(db.getRawMessage(txn, messageId));
 
 		db.commitTransaction(txn);
 		db.close();
@@ -1735,8 +1733,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 	@Test
 	public void testGetNextSendTime() throws Exception {
 		long now = System.currentTimeMillis();
-		Database<Connection> db = open(false, new TestMessageFactory(),
-				new StoppedClock(now));
+		Database<Connection> db = open(false, new StoppedClock(now));
 		Connection txn = db.startTransaction();
 
 		// Add a contact, a group and a message
@@ -1767,12 +1764,12 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 		// Update the message's expiry time as though we sent it - now the
 		// message should be sendable after one round-trip
-		db.updateExpiryTimeAndEta(txn, contactId, messageId, 1000);
+		db.updateExpiryTime(txn, contactId, messageId, 1000);
 		assertEquals(now + 2000, db.getNextSendTime(txn, contactId));
 
 		// Update the message's expiry time again - now it should be sendable
 		// after two round-trips
-		db.updateExpiryTimeAndEta(txn, contactId, messageId, 1000);
+		db.updateExpiryTime(txn, contactId, messageId, 1000);
 		assertEquals(now + 4000, db.getNextSendTime(txn, contactId));
 
 		// Delete the message - there should be no messages to send
@@ -1805,7 +1802,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 		try {
 			// Ask for a nonexistent message - an exception should be thrown
-			db.getMessage(txn, messageId);
+			db.getRawMessage(txn, messageId);
 			fail();
 		} catch (DbException expected) {
 			// It should be possible to abort the transaction without error
@@ -1815,112 +1812,14 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		db.close();
 	}
 
-	@Test
-	public void testMessageRetransmission() throws Exception {
-		long now = System.currentTimeMillis();
-		long steps[] = {now, now, now + MAX_LATENCY * 2 - 1,
-				now + MAX_LATENCY * 2};
-		Database<Connection> db =
-				open(false, new TestMessageFactory(), new ArrayClock(steps));
-		Connection txn = db.startTransaction();
-
-		// Add a contact, a shared group and a shared message
-		db.addLocalAuthor(txn, localAuthor);
-		assertEquals(contactId, db.addContact(txn, author, localAuthor.getId(),
-				true, true));
-		db.addGroup(txn, group);
-		db.addGroupVisibility(txn, contactId, groupId, true);
-		db.addMessage(txn, message, DELIVERED, true, null);
-
-		// Time: now
-		// Retrieve the message from the database
-		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
-				ONE_MEGABYTE, MAX_LATENCY);
-		assertEquals(singletonList(messageId), ids);
-
-		// Time: now
-		// Mark the message as sent
-		db.updateExpiryTimeAndEta(txn, contactId, messageId, MAX_LATENCY);
-
-		// The message should expire after 2 * MAX_LATENCY
-		assertEquals(now + MAX_LATENCY * 2, db.getNextSendTime(txn, contactId));
-
-		// Time: now + MAX_LATENCY * 2 - 1
-		// The message should not yet be sendable
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
-		assertTrue(ids.isEmpty());
-
-		// Time: now + MAX_LATENCY * 2
-		// The message should have expired and should now be sendable
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
-		assertEquals(singletonList(messageId), ids);
-
-		db.commitTransaction(txn);
-		db.close();
-	}
-
-
-	@Test
-	public void testFasterMessageRetransmission() throws Exception {
-		long now = System.currentTimeMillis();
-		long steps[] = {now, now, now, now, now + 1};
-		Database<Connection> db =
-				open(false, new TestMessageFactory(), new ArrayClock(steps));
-		Connection txn = db.startTransaction();
-
-		// Add a contact, a shared group and a shared message
-		db.addLocalAuthor(txn, localAuthor);
-		assertEquals(contactId, db.addContact(txn, author, localAuthor.getId(),
-				true, true));
-		db.addGroup(txn, group);
-		db.addGroupVisibility(txn, contactId, groupId, true);
-		db.addMessage(txn, message, DELIVERED, true, null);
-
-		// Time: now
-		// Retrieve the message from the database
-		Collection<MessageId> ids = db.getMessagesToSend(txn, contactId,
-				ONE_MEGABYTE, MAX_LATENCY);
-		assertEquals(singletonList(messageId), ids);
-
-		// Time: now
-		// Mark the message as sent
-		db.updateExpiryTimeAndEta(txn, contactId, messageId, MAX_LATENCY);
-
-		// The message should expire after 2 * MAX_LATENCY
-		assertEquals(now + MAX_LATENCY * 2, db.getNextSendTime(txn, contactId));
-
-		// Time: now
-		// The message should not be sendable via the same transport
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE, MAX_LATENCY);
-		assertTrue(ids.isEmpty());
-
-		// Time: now
-		// The message should be sendable via a transport with a faster ETA
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE,
-				MAX_LATENCY - 1);
-		assertEquals(singletonList(messageId), ids);
-
-		// Time: now + 1
-		// The message should no longer be sendable via the faster transport,
-		// as the ETA is now equal
-		ids = db.getMessagesToSend(txn, contactId, ONE_MEGABYTE,
-				MAX_LATENCY - 1);
-		assertTrue(ids.isEmpty());
-
-		db.commitTransaction(txn);
-		db.close();
-	}
-
-
 	private Database<Connection> open(boolean resume) throws Exception {
-		return open(resume, new TestMessageFactory(), new SystemClock());
+		return open(resume, new SystemClock());
 	}
 
-	private Database<Connection> open(boolean resume,
-			MessageFactory messageFactory, Clock clock) throws Exception {
-		Database<Connection> db =
-				createDatabase(new TestDatabaseConfig(testDir, MAX_SIZE),
-						messageFactory, clock);
+	private Database<Connection> open(boolean resume, Clock clock)
+			throws Exception {
+		Database<Connection> db = createDatabase(
+				new TestDatabaseConfig(testDir, MAX_SIZE), clock);
 		if (!resume) TestUtils.deleteTestDirectory(testDir);
 		db.open(key, null);
 		return db;
@@ -1949,7 +1848,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 
 	@After
 	public void tearDown() {
-		deleteTestDirectory(testDir);
+		TestUtils.deleteTestDirectory(testDir);
 	}
 
 	private static class StoppedClock implements Clock {

bramble-core/src/test/java/org/briarproject/bramble/db/SingleDatabasePerformanceTest.java

@@ -1,13 +1,10 @@
 package org.briarproject.bramble.db;
 
-import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.system.SystemClock;
 import org.briarproject.bramble.test.TestDatabaseConfig;
-import org.briarproject.bramble.test.TestMessageFactory;
 
 import java.io.IOException;
 import java.sql.Connection;
@@ -23,9 +20,7 @@ public abstract class SingleDatabasePerformanceTest
 		extends DatabasePerformanceTest {
 
 	abstract Database<Connection> createDatabase(DatabaseConfig databaseConfig,
-			MessageFactory messageFactory, Clock clock);
-
-	private SecretKey databaseKey = getSecretKey();
+			Clock clock);
 
 	@Override
 	protected void benchmark(String name,
@@ -45,9 +40,8 @@ public abstract class SingleDatabasePerformanceTest
 
 	private Database<Connection> openDatabase() throws DbException {
 		Database<Connection> db = createDatabase(
-				new TestDatabaseConfig(testDir, MAX_SIZE),
-				new TestMessageFactory(), new SystemClock());
-		db.open(databaseKey, null);
+				new TestDatabaseConfig(testDir, MAX_SIZE), new SystemClock());
+		db.open(getSecretKey(), null);
 		return db;
 	}
 

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

@@ -1,156 +0,0 @@
-package org.briarproject.bramble.keyagreement;
-
-import org.briarproject.bramble.api.Bytes;
-import org.briarproject.bramble.api.FormatException;
-import org.briarproject.bramble.api.data.BdfList;
-import org.briarproject.bramble.api.data.BdfReader;
-import org.briarproject.bramble.api.data.BdfReaderFactory;
-import org.briarproject.bramble.api.keyagreement.Payload;
-import org.briarproject.bramble.api.keyagreement.UnsupportedVersionException;
-import org.briarproject.bramble.test.BrambleMockTestCase;
-import org.jmock.Expectations;
-import org.junit.Test;
-
-import java.io.ByteArrayInputStream;
-
-import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.BETA_PROTOCOL_VERSION;
-import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.COMMIT_LENGTH;
-import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.PROTOCOL_VERSION;
-import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
-import static org.junit.Assert.assertArrayEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
-
-public class PayloadParserImplTest extends BrambleMockTestCase {
-
-	private final BdfReaderFactory bdfReaderFactory =
-			context.mock(BdfReaderFactory.class);
-	private final BdfReader bdfReader = context.mock(BdfReader.class);
-
-	private final PayloadParserImpl payloadParser =
-			new PayloadParserImpl(bdfReaderFactory);
-
-	@Test(expected = FormatException.class)
-	public void testThrowsFormatExceptionIfPayloadIsEmpty() throws Exception {
-		payloadParser.parse(new byte[0]);
-	}
-
-	@Test
-	public void testThrowsUnsupportedVersionExceptionForOldVersion()
-			throws Exception {
-		try {
-			payloadParser.parse(new byte[] {PROTOCOL_VERSION - 1});
-			fail();
-		} catch (UnsupportedVersionException e) {
-			assertTrue(e.isTooOld());
-		}
-	}
-
-	@Test
-	public void testThrowsUnsupportedVersionExceptionForBetaVersion()
-			throws Exception {
-		try {
-			payloadParser.parse(new byte[] {BETA_PROTOCOL_VERSION});
-			fail();
-		} catch (UnsupportedVersionException e) {
-			assertTrue(e.isTooOld());
-		}
-	}
-
-	@Test
-	public void testThrowsUnsupportedVersionExceptionForNewVersion()
-			throws Exception {
-		try {
-			payloadParser.parse(new byte[] {PROTOCOL_VERSION + 1});
-			fail();
-		} catch (UnsupportedVersionException e) {
-			assertFalse(e.isTooOld());
-		}
-	}
-
-	@Test(expected = FormatException.class)
-	public void testThrowsFormatExceptionForEmptyList() throws Exception {
-		context.checking(new Expectations() {{
-			oneOf(bdfReaderFactory).createReader(
-					with(any(ByteArrayInputStream.class)));
-			will(returnValue(bdfReader));
-			oneOf(bdfReader).readList();
-			will(returnValue(new BdfList()));
-		}});
-
-		payloadParser.parse(new byte[] {PROTOCOL_VERSION});
-	}
-
-	@Test(expected = FormatException.class)
-	public void testThrowsFormatExceptionForDataAfterList()
-			throws Exception {
-		byte[] commitment = getRandomBytes(COMMIT_LENGTH);
-
-		context.checking(new Expectations() {{
-			oneOf(bdfReaderFactory).createReader(
-					with(any(ByteArrayInputStream.class)));
-			will(returnValue(bdfReader));
-			oneOf(bdfReader).readList();
-			will(returnValue(BdfList.of(new Bytes(commitment))));
-			oneOf(bdfReader).eof();
-			will(returnValue(false));
-		}});
-
-		payloadParser.parse(new byte[] {PROTOCOL_VERSION});
-	}
-
-	@Test(expected = FormatException.class)
-	public void testThrowsFormatExceptionForShortCommitment()
-			throws Exception {
-		byte[] commitment = getRandomBytes(COMMIT_LENGTH - 1);
-
-		context.checking(new Expectations() {{
-			oneOf(bdfReaderFactory).createReader(
-					with(any(ByteArrayInputStream.class)));
-			will(returnValue(bdfReader));
-			oneOf(bdfReader).readList();
-			will(returnValue(BdfList.of(new Bytes(commitment))));
-			oneOf(bdfReader).eof();
-			will(returnValue(true));
-		}});
-
-		payloadParser.parse(new byte[] {PROTOCOL_VERSION});
-	}
-
-	@Test(expected = FormatException.class)
-	public void testThrowsFormatExceptionForLongCommitment()
-			throws Exception {
-		byte[] commitment = getRandomBytes(COMMIT_LENGTH + 1);
-
-		context.checking(new Expectations() {{
-			oneOf(bdfReaderFactory).createReader(
-					with(any(ByteArrayInputStream.class)));
-			will(returnValue(bdfReader));
-			oneOf(bdfReader).readList();
-			will(returnValue(BdfList.of(new Bytes(commitment))));
-			oneOf(bdfReader).eof();
-			will(returnValue(true));
-		}});
-
-		payloadParser.parse(new byte[] {PROTOCOL_VERSION});
-	}
-
-	@Test
-	public void testAcceptsPayloadWithNoDescriptors() throws Exception {
-		byte[] commitment = getRandomBytes(COMMIT_LENGTH);
-		context.checking(new Expectations() {{
-			oneOf(bdfReaderFactory).createReader(
-					with(any(ByteArrayInputStream.class)));
-			will(returnValue(bdfReader));
-			oneOf(bdfReader).readList();
-			will(returnValue(BdfList.of(new Bytes(commitment))));
-			oneOf(bdfReader).eof();
-			will(returnValue(true));
-		}});
-
-		Payload p = payloadParser.parse(new byte[] {PROTOCOL_VERSION});
-		assertArrayEquals(commitment, p.getCommitment());
-		assertTrue(p.getTransportDescriptors().isEmpty());
-	}
-}

bramble-core/src/test/java/org/briarproject/bramble/properties/TransportPropertyManagerImplTest.java

@@ -34,10 +34,11 @@ import static java.util.Collections.singletonList;
 import static org.briarproject.bramble.api.properties.TransportPropertyManager.CLIENT_ID;
 import static org.briarproject.bramble.api.properties.TransportPropertyManager.MAJOR_VERSION;
 import static org.briarproject.bramble.api.sync.Group.Visibility.SHARED;
+import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_BODY_LENGTH;
 import static org.briarproject.bramble.test.TestUtils.getAuthor;
 import static org.briarproject.bramble.test.TestUtils.getGroup;
 import static org.briarproject.bramble.test.TestUtils.getLocalAuthor;
-import static org.briarproject.bramble.test.TestUtils.getMessage;
+import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
 import static org.briarproject.bramble.test.TestUtils.getRandomId;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
@@ -186,7 +187,8 @@ public class TransportPropertyManagerImplTest extends BrambleMockTestCase {
 			throws Exception {
 		Transaction txn = new Transaction(null, false);
 		GroupId contactGroupId = new GroupId(getRandomId());
-		Message message = getMessage(contactGroupId);
+		long timestamp = 123456789;
+		Message message = getMessage(contactGroupId, timestamp);
 		Metadata meta = new Metadata();
 		BdfDictionary metaDictionary = BdfDictionary.of(
 				new BdfEntry("transportId", "foo"),
@@ -227,7 +229,8 @@ public class TransportPropertyManagerImplTest extends BrambleMockTestCase {
 			throws Exception {
 		Transaction txn = new Transaction(null, false);
 		GroupId contactGroupId = new GroupId(getRandomId());
-		Message message = getMessage(contactGroupId);
+		long timestamp = 123456789;
+		Message message = getMessage(contactGroupId, timestamp);
 		Metadata meta = new Metadata();
 		// Version 4 is being delivered
 		BdfDictionary metaDictionary = BdfDictionary.of(
@@ -264,7 +267,8 @@ public class TransportPropertyManagerImplTest extends BrambleMockTestCase {
 	public void testDeletesObsoleteUpdateWhenDelivered() throws Exception {
 		Transaction txn = new Transaction(null, false);
 		GroupId contactGroupId = new GroupId(getRandomId());
-		Message message = getMessage(contactGroupId);
+		long timestamp = 123456789;
+		Message message = getMessage(contactGroupId, timestamp);
 		Metadata meta = new Metadata();
 		// Version 3 is being delivered
 		BdfDictionary metaDictionary = BdfDictionary.of(
@@ -615,6 +619,12 @@ public class TransportPropertyManagerImplTest extends BrambleMockTestCase {
 				true, active);
 	}
 
+	private Message getMessage(GroupId g, long timestamp) {
+		MessageId messageId = new MessageId(getRandomId());
+		byte[] raw = getRandomBytes(MAX_MESSAGE_BODY_LENGTH);
+		return new Message(messageId, g, timestamp, raw);
+	}
+
 	private void expectGetLocalProperties(Transaction txn) throws Exception {
 		Map<MessageId, BdfDictionary> messageMetadata = new LinkedHashMap<>();
 		// The latest update for transport "foo" should be returned
@@ -654,9 +664,9 @@ public class TransportPropertyManagerImplTest extends BrambleMockTestCase {
 	private void expectStoreMessage(Transaction txn, GroupId g,
 			String transportId, BdfDictionary properties, long version,
 			boolean local, boolean shared) throws Exception {
+		long timestamp = 123456789;
 		BdfList body = BdfList.of(transportId, version, properties);
-		Message message = getMessage(g);
-		long timestamp = message.getTimestamp();
+		Message message = getMessage(g, timestamp);
 		BdfDictionary meta = BdfDictionary.of(
 				new BdfEntry("transportId", transportId),
 				new BdfEntry("version", version),

bramble-core/src/test/java/org/briarproject/bramble/sync/SimplexOutgoingSessionTest.java

@@ -5,8 +5,6 @@ import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.sync.Ack;
-import org.briarproject.bramble.api.sync.GroupId;
-import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.SyncRecordWriter;
 import org.briarproject.bramble.api.transport.StreamWriter;
@@ -15,11 +13,11 @@ import org.briarproject.bramble.test.ImmediateExecutor;
 import org.jmock.Expectations;
 import org.junit.Test;
 
+import java.util.Arrays;
+import java.util.Collections;
 import java.util.concurrent.Executor;
 
-import static java.util.Collections.singletonList;
 import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_IDS;
-import static org.briarproject.bramble.test.TestUtils.getMessage;
 import static org.briarproject.bramble.test.TestUtils.getRandomId;
 
 public class SimplexOutgoingSessionTest extends BrambleMockTestCase {
@@ -34,8 +32,7 @@ public class SimplexOutgoingSessionTest extends BrambleMockTestCase {
 
 	private final Executor dbExecutor = new ImmediateExecutor();
 	private final ContactId contactId = new ContactId(234);
-	private final Message message = getMessage(new GroupId(getRandomId()));
-	private final MessageId messageId = message.getId();
+	private final MessageId messageId = new MessageId(getRandomId());
 
 	@Test
 	public void testNothingToSend() throws Exception {
@@ -74,7 +71,8 @@ public class SimplexOutgoingSessionTest extends BrambleMockTestCase {
 
 	@Test
 	public void testSomethingToSend() throws Exception {
-		Ack ack = new Ack(singletonList(messageId));
+		Ack ack = new Ack(Collections.singletonList(messageId));
+		byte[] raw = new byte[1234];
 		SimplexOutgoingSession session = new SimplexOutgoingSession(db,
 				dbExecutor, eventBus, contactId, MAX_LATENCY, streamWriter,
 				recordWriter);
@@ -99,10 +97,10 @@ public class SimplexOutgoingSessionTest extends BrambleMockTestCase {
 			will(returnValue(msgTxn));
 			oneOf(db).generateBatch(with(msgTxn), with(contactId),
 					with(any(int.class)), with(MAX_LATENCY));
-			will(returnValue(singletonList(message)));
+			will(returnValue(Arrays.asList(raw)));
 			oneOf(db).commitTransaction(msgTxn);
 			oneOf(db).endTransaction(msgTxn);
-			oneOf(recordWriter).writeMessage(message);
+			oneOf(recordWriter).writeMessage(raw);
 			// No more acks
 			oneOf(db).startTransaction(false);
 			will(returnValue(noAckTxn));

bramble-core/src/test/java/org/briarproject/bramble/sync/SyncIntegrationTest.java

@@ -108,8 +108,8 @@ public class SyncIntegrationTest extends BrambleTestCase {
 				streamWriter.getOutputStream());
 
 		recordWriter.writeAck(new Ack(messageIds));
-		recordWriter.writeMessage(message);
-		recordWriter.writeMessage(message1);
+		recordWriter.writeMessage(message.getRaw());
+		recordWriter.writeMessage(message1.getRaw());
 		recordWriter.writeOffer(new Offer(messageIds));
 		recordWriter.writeRequest(new Request(messageIds));
 
@@ -169,7 +169,7 @@ public class SyncIntegrationTest extends BrambleTestCase {
 		assertArrayEquals(m1.getGroupId().getBytes(),
 				m2.getGroupId().getBytes());
 		assertEquals(m1.getTimestamp(), m2.getTimestamp());
-		assertEquals(m1.getRawLength(), m2.getRawLength());
-		assertArrayEquals(m1.getBody(), m2.getBody());
+		assertEquals(m1.getLength(), m2.getLength());
+		assertArrayEquals(m1.getRaw(), m2.getRaw());
 	}
 }

bramble-core/src/test/java/org/briarproject/bramble/sync/ValidationManagerImplTest.java

@@ -1,5 +1,6 @@
 package org.briarproject.bramble.sync;
 
+import org.briarproject.bramble.api.UniqueId;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.Metadata;
@@ -12,6 +13,7 @@ import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.InvalidMessageException;
 import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.MessageContext;
+import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.ValidationManager.IncomingMessageHook;
 import org.briarproject.bramble.api.sync.ValidationManager.MessageValidator;
@@ -19,31 +21,30 @@ import org.briarproject.bramble.api.sync.ValidationManager.State;
 import org.briarproject.bramble.api.sync.event.MessageAddedEvent;
 import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.briarproject.bramble.test.ImmediateExecutor;
+import org.briarproject.bramble.util.ByteUtils;
 import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Test;
 
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.concurrent.Executor;
 
-import static java.util.Collections.emptyList;
-import static java.util.Collections.emptyMap;
-import static java.util.Collections.singletonList;
-import static java.util.Collections.singletonMap;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.DELIVERED;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.INVALID;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.PENDING;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.UNKNOWN;
 import static org.briarproject.bramble.test.TestUtils.getClientId;
 import static org.briarproject.bramble.test.TestUtils.getGroup;
-import static org.briarproject.bramble.test.TestUtils.getMessage;
 import static org.briarproject.bramble.test.TestUtils.getRandomId;
 
 public class ValidationManagerImplTest extends BrambleMockTestCase {
 
 	private final DatabaseComponent db = context.mock(DatabaseComponent.class);
+	private final MessageFactory messageFactory =
+			context.mock(MessageFactory.class);
 	private final MessageValidator validator =
 			context.mock(MessageValidator.class);
 	private final IncomingMessageHook hook =
@@ -53,26 +54,38 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 	private final Executor validationExecutor = new ImmediateExecutor();
 	private final ClientId clientId = getClientId();
 	private final int majorVersion = 123;
+	private final MessageId messageId = new MessageId(getRandomId());
+	private final MessageId messageId1 = new MessageId(getRandomId());
+	private final MessageId messageId2 = new MessageId(getRandomId());
 	private final Group group = getGroup(clientId, majorVersion);
 	private final GroupId groupId = group.getId();
-	private final Message message = getMessage(groupId);
-	private final Message message1 = getMessage(groupId);
-	private final Message message2 = getMessage(groupId);
-	private final MessageId messageId = message.getId();
-	private final MessageId messageId1 = message1.getId();
-	private final MessageId messageId2 = message2.getId();
+	private final long timestamp = System.currentTimeMillis();
+	private final byte[] raw = new byte[123];
+	private final Message message = new Message(messageId, groupId, timestamp,
+			raw);
+	private final Message message1 = new Message(messageId1, groupId, timestamp,
+			raw);
+	private final Message message2 = new Message(messageId2, groupId, timestamp,
+			raw);
 
 	private final Metadata metadata = new Metadata();
 	private final MessageContext validResult = new MessageContext(metadata);
 	private final ContactId contactId = new ContactId(234);
 	private final MessageContext validResultWithDependencies =
-			new MessageContext(metadata, singletonList(messageId1));
+			new MessageContext(metadata, Collections.singletonList(messageId1));
 
 	private ValidationManagerImpl vm;
 
+	public ValidationManagerImplTest() {
+		// Encode the messages
+		System.arraycopy(groupId.getBytes(), 0, raw, 0, UniqueId.LENGTH);
+		ByteUtils.writeUint64(timestamp, raw, UniqueId.LENGTH);
+	}
+
 	@Before
 	public void setUp() {
-		vm = new ValidationManagerImpl(db, dbExecutor, validationExecutor);
+		vm = new ValidationManagerImpl(db, dbExecutor, validationExecutor,
+				messageFactory);
 		vm.registerMessageValidator(clientId, majorVersion, validator);
 		vm.registerIncomingMessageHook(clientId, majorVersion, hook);
 	}
@@ -88,21 +101,21 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn));
 			oneOf(db).getMessagesToValidate(txn);
-			will(returnValue(emptyList()));
+			will(returnValue(Collections.emptyList()));
 			oneOf(db).commitTransaction(txn);
 			oneOf(db).endTransaction(txn);
 			// deliverOutstandingMessages()
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn1));
 			oneOf(db).getPendingMessages(txn1);
-			will(returnValue(emptyList()));
+			will(returnValue(Collections.emptyList()));
 			oneOf(db).commitTransaction(txn1);
 			oneOf(db).endTransaction(txn1);
 			// shareOutstandingMessages()
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn2));
 			oneOf(db).getMessagesToShare(txn2);
-			will(returnValue(emptyList()));
+			will(returnValue(Collections.emptyList()));
 			oneOf(db).commitTransaction(txn2);
 			oneOf(db).endTransaction(txn2);
 		}});
@@ -132,7 +145,9 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			// Load the first raw message and group
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn1));
-			oneOf(db).getMessage(txn1, messageId);
+			oneOf(db).getRawMessage(txn1, messageId);
+			will(returnValue(raw));
+			oneOf(messageFactory).createMessage(messageId, raw);
 			will(returnValue(message));
 			oneOf(db).getGroup(txn1, groupId);
 			will(returnValue(group));
@@ -151,13 +166,15 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).setMessageState(txn2, messageId, DELIVERED);
 			// Get any pending dependents
 			oneOf(db).getMessageDependents(txn2, messageId);
-			will(returnValue(emptyMap()));
+			will(returnValue(Collections.emptyMap()));
 			oneOf(db).commitTransaction(txn2);
 			oneOf(db).endTransaction(txn2);
 			// Load the second raw message and group
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn3));
-			oneOf(db).getMessage(txn3, messageId1);
+			oneOf(db).getRawMessage(txn3, messageId1);
+			will(returnValue(raw));
+			oneOf(messageFactory).createMessage(messageId1, raw);
 			will(returnValue(message1));
 			oneOf(db).getGroup(txn3, groupId);
 			will(returnValue(group));
@@ -176,21 +193,21 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).deleteMessageMetadata(txn4, messageId1);
 			// Recursively invalidate any dependents
 			oneOf(db).getMessageDependents(txn4, messageId1);
-			will(returnValue(emptyMap()));
+			will(returnValue(Collections.emptyMap()));
 			oneOf(db).commitTransaction(txn4);
 			oneOf(db).endTransaction(txn4);
 			// Get pending messages to deliver
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn5));
 			oneOf(db).getPendingMessages(txn5);
-			will(returnValue(emptyList()));
+			will(returnValue(Collections.emptyList()));
 			oneOf(db).commitTransaction(txn5);
 			oneOf(db).endTransaction(txn5);
 			// Get messages to share
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn6));
 			oneOf(db).getMessagesToShare(txn6);
-			will(returnValue(emptyList()));
+			will(returnValue(Collections.emptyList()));
 			oneOf(db).commitTransaction(txn6);
 			oneOf(db).endTransaction(txn6);
 		}});
@@ -211,14 +228,14 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn));
 			oneOf(db).getMessagesToValidate(txn);
-			will(returnValue(emptyList()));
+			will(returnValue(Collections.emptyList()));
 			oneOf(db).commitTransaction(txn);
 			oneOf(db).endTransaction(txn);
 			// Get pending messages to deliver
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn1));
 			oneOf(db).getPendingMessages(txn1);
-			will(returnValue(singletonList(messageId)));
+			will(returnValue(Collections.singletonList(messageId)));
 			oneOf(db).commitTransaction(txn1);
 			oneOf(db).endTransaction(txn1);
 			// Check whether the message is ready to deliver
@@ -227,9 +244,11 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).getMessageState(txn2, messageId);
 			will(returnValue(PENDING));
 			oneOf(db).getMessageDependencies(txn2, messageId);
-			will(returnValue(singletonMap(messageId1, DELIVERED)));
+			will(returnValue(Collections.singletonMap(messageId1, DELIVERED)));
 			// Get the message and its metadata to deliver
-			oneOf(db).getMessage(txn2, messageId);
+			oneOf(db).getRawMessage(txn2, messageId);
+			will(returnValue(raw));
+			oneOf(messageFactory).createMessage(messageId, raw);
 			will(returnValue(message));
 			oneOf(db).getGroup(txn2, groupId);
 			will(returnValue(group));
@@ -241,7 +260,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).setMessageState(txn2, messageId, DELIVERED);
 			// Get any pending dependents
 			oneOf(db).getMessageDependents(txn2, messageId);
-			will(returnValue(singletonMap(messageId2, PENDING)));
+			will(returnValue(Collections.singletonMap(messageId2, PENDING)));
 			oneOf(db).commitTransaction(txn2);
 			oneOf(db).endTransaction(txn2);
 			// Check whether the dependent is ready to deliver
@@ -250,9 +269,11 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).getMessageState(txn3, messageId2);
 			will(returnValue(PENDING));
 			oneOf(db).getMessageDependencies(txn3, messageId2);
-			will(returnValue(singletonMap(messageId1, DELIVERED)));
+			will(returnValue(Collections.singletonMap(messageId1, DELIVERED)));
 			// Get the dependent and its metadata to deliver
-			oneOf(db).getMessage(txn3, messageId2);
+			oneOf(db).getRawMessage(txn3, messageId2);
+			will(returnValue(raw));
+			oneOf(messageFactory).createMessage(messageId2, raw);
 			will(returnValue(message2));
 			oneOf(db).getGroup(txn3, groupId);
 			will(returnValue(group));
@@ -264,7 +285,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).setMessageState(txn3, messageId2, DELIVERED);
 			// Get any pending dependents
 			oneOf(db).getMessageDependents(txn3, messageId2);
-			will(returnValue(emptyMap()));
+			will(returnValue(Collections.emptyMap()));
 			oneOf(db).commitTransaction(txn3);
 			oneOf(db).endTransaction(txn3);
 
@@ -272,7 +293,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn4));
 			oneOf(db).getMessagesToShare(txn4);
-			will(returnValue(emptyList()));
+			will(returnValue(Collections.emptyList()));
 			oneOf(db).commitTransaction(txn4);
 			oneOf(db).endTransaction(txn4);
 		}});
@@ -293,14 +314,14 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn));
 			oneOf(db).getMessagesToValidate(txn);
-			will(returnValue(emptyList()));
+			will(returnValue(Collections.emptyList()));
 			oneOf(db).commitTransaction(txn);
 			oneOf(db).endTransaction(txn);
 			// No pending messages to deliver
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn1));
 			oneOf(db).getPendingMessages(txn1);
-			will(returnValue(emptyList()));
+			will(returnValue(Collections.emptyList()));
 			oneOf(db).commitTransaction(txn1);
 			oneOf(db).endTransaction(txn1);
 
@@ -308,7 +329,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn2));
 			oneOf(db).getMessagesToShare(txn2);
-			will(returnValue(singletonList(messageId)));
+			will(returnValue(Collections.singletonList(messageId)));
 			oneOf(db).commitTransaction(txn2);
 			oneOf(db).endTransaction(txn2);
 			// Share message and get dependencies
@@ -316,7 +337,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			will(returnValue(txn3));
 			oneOf(db).setMessageShared(txn3, messageId);
 			oneOf(db).getMessageDependencies(txn3, messageId);
-			will(returnValue(singletonMap(messageId2, DELIVERED)));
+			will(returnValue(Collections.singletonMap(messageId2, DELIVERED)));
 			oneOf(db).commitTransaction(txn3);
 			oneOf(db).endTransaction(txn3);
 			// Share dependency
@@ -324,7 +345,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			will(returnValue(txn4));
 			oneOf(db).setMessageShared(txn4, messageId2);
 			oneOf(db).getMessageDependencies(txn4, messageId2);
-			will(returnValue(emptyMap()));
+			will(returnValue(Collections.emptyMap()));
 			oneOf(db).commitTransaction(txn4);
 			oneOf(db).endTransaction(txn4);
 		}});
@@ -355,7 +376,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).addMessageDependencies(txn1, message,
 					validResultWithDependencies.getDependencies());
 			oneOf(db).getMessageDependencies(txn1, messageId);
-			will(returnValue(singletonMap(messageId1, DELIVERED)));
+			will(returnValue(Collections.singletonMap(messageId1, DELIVERED)));
 			oneOf(db).mergeMessageMetadata(txn1, messageId, metadata);
 			// Deliver the message
 			oneOf(hook).incomingMessage(txn1, message, metadata);
@@ -363,7 +384,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).setMessageState(txn1, messageId, DELIVERED);
 			// Get any pending dependents
 			oneOf(db).getMessageDependents(txn1, messageId);
-			will(returnValue(emptyMap()));
+			will(returnValue(Collections.emptyMap()));
 			// Share message
 			oneOf(db).setMessageShared(txn1, messageId);
 			oneOf(db).commitTransaction(txn1);
@@ -373,7 +394,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			will(returnValue(txn2));
 			oneOf(db).setMessageShared(txn2, messageId1);
 			oneOf(db).getMessageDependencies(txn2, messageId1);
-			will(returnValue(emptyMap()));
+			will(returnValue(Collections.emptyMap()));
 			oneOf(db).commitTransaction(txn2);
 			oneOf(db).endTransaction(txn2);
 		}});
@@ -402,14 +423,16 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			// Load the first raw message - *gasp* it's gone!
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn1));
-			oneOf(db).getMessage(txn1, messageId);
+			oneOf(db).getRawMessage(txn1, messageId);
 			will(throwException(new NoSuchMessageException()));
 			never(db).commitTransaction(txn1);
 			oneOf(db).endTransaction(txn1);
 			// Load the second raw message and group
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn2));
-			oneOf(db).getMessage(txn2, messageId1);
+			oneOf(db).getRawMessage(txn2, messageId1);
+			will(returnValue(raw));
+			oneOf(messageFactory).createMessage(messageId1, raw);
 			will(returnValue(message1));
 			oneOf(db).getGroup(txn2, groupId);
 			will(returnValue(group));
@@ -428,21 +451,21 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).deleteMessageMetadata(txn3, messageId1);
 			// Recursively invalidate dependents
 			oneOf(db).getMessageDependents(txn3, messageId1);
-			will(returnValue(emptyMap()));
+			will(returnValue(Collections.emptyMap()));
 			oneOf(db).commitTransaction(txn3);
 			oneOf(db).endTransaction(txn3);
 			// Get pending messages to deliver
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn4));
 			oneOf(db).getPendingMessages(txn4);
-			will(returnValue(emptyList()));
+			will(returnValue(Collections.emptyList()));
 			oneOf(db).commitTransaction(txn4);
 			oneOf(db).endTransaction(txn4);
 			// Get messages to share
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn5));
 			oneOf(db).getMessagesToShare(txn5);
-			will(returnValue(emptyList()));
+			will(returnValue(Collections.emptyList()));
 			oneOf(db).commitTransaction(txn5);
 			oneOf(db).endTransaction(txn5);
 		}});
@@ -471,7 +494,9 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			// Load the first raw message
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn1));
-			oneOf(db).getMessage(txn1, messageId);
+			oneOf(db).getRawMessage(txn1, messageId);
+			will(returnValue(raw));
+			oneOf(messageFactory).createMessage(messageId, raw);
 			will(returnValue(message));
 			// Load the group - *gasp* it's gone!
 			oneOf(db).getGroup(txn1, groupId);
@@ -481,7 +506,9 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			// Load the second raw message and group
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn2));
-			oneOf(db).getMessage(txn2, messageId1);
+			oneOf(db).getRawMessage(txn2, messageId1);
+			will(returnValue(raw));
+			oneOf(messageFactory).createMessage(messageId1, raw);
 			will(returnValue(message1));
 			oneOf(db).getGroup(txn2, groupId);
 			will(returnValue(group));
@@ -500,21 +527,21 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).deleteMessageMetadata(txn3, messageId1);
 			// Recursively invalidate dependents
 			oneOf(db).getMessageDependents(txn3, messageId1);
-			will(returnValue(emptyMap()));
+			will(returnValue(Collections.emptyMap()));
 			oneOf(db).commitTransaction(txn3);
 			oneOf(db).endTransaction(txn3);
 			// Get pending messages to deliver
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn4));
 			oneOf(db).getPendingMessages(txn4);
-			will(returnValue(emptyList()));
+			will(returnValue(Collections.emptyList()));
 			oneOf(db).commitTransaction(txn4);
 			oneOf(db).endTransaction(txn4);
 			// Get messages to share
 			oneOf(db).startTransaction(true);
 			will(returnValue(txn5));
 			oneOf(db).getMessagesToShare(txn5);
-			will(returnValue(emptyList()));
+			will(returnValue(Collections.emptyList()));
 			oneOf(db).commitTransaction(txn5);
 			oneOf(db).endTransaction(txn5);
 		}});
@@ -548,7 +575,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).setMessageState(txn1, messageId, DELIVERED);
 			// Get any pending dependents
 			oneOf(db).getMessageDependents(txn1, messageId);
-			will(returnValue(emptyMap()));
+			will(returnValue(Collections.emptyMap()));
 			oneOf(db).commitTransaction(txn1);
 			oneOf(db).endTransaction(txn1);
 		}});
@@ -557,7 +584,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 	}
 
 	@Test
-	public void testLocalMessagesAreNotValidatedWhenAdded() {
+	public void testLocalMessagesAreNotValidatedWhenAdded() throws Exception {
 		vm.eventOccurred(new MessageAddedEvent(message, null));
 	}
 
@@ -584,7 +611,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).addMessageDependencies(txn1, message,
 					validResultWithDependencies.getDependencies());
 			oneOf(db).getMessageDependencies(txn1, messageId);
-			will(returnValue(singletonMap(messageId1, UNKNOWN)));
+			will(returnValue(Collections.singletonMap(messageId1, UNKNOWN)));
 			oneOf(db).mergeMessageMetadata(txn1, messageId, metadata);
 			oneOf(db).setMessageState(txn1, messageId, PENDING);
 			oneOf(db).commitTransaction(txn1);
@@ -617,7 +644,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).addMessageDependencies(txn1, message,
 					validResultWithDependencies.getDependencies());
 			oneOf(db).getMessageDependencies(txn1, messageId);
-			will(returnValue(singletonMap(messageId1, DELIVERED)));
+			will(returnValue(Collections.singletonMap(messageId1, DELIVERED)));
 			oneOf(db).mergeMessageMetadata(txn1, messageId, metadata);
 			// Deliver the message
 			oneOf(hook).incomingMessage(txn1, message, metadata);
@@ -625,7 +652,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).setMessageState(txn1, messageId, DELIVERED);
 			// Get any pending dependents
 			oneOf(db).getMessageDependents(txn1, messageId);
-			will(returnValue(emptyMap()));
+			will(returnValue(Collections.emptyMap()));
 			oneOf(db).commitTransaction(txn1);
 			oneOf(db).endTransaction(txn1);
 		}});
@@ -658,7 +685,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 					validResultWithDependencies.getDependencies());
 			// Check for invalid dependencies
 			oneOf(db).getMessageDependencies(txn1, messageId);
-			will(returnValue(singletonMap(messageId1, INVALID)));
+			will(returnValue(Collections.singletonMap(messageId1, INVALID)));
 			// Invalidate message
 			oneOf(db).getMessageState(txn1, messageId);
 			will(returnValue(UNKNOWN));
@@ -667,7 +694,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).deleteMessageMetadata(txn1, messageId);
 			// Recursively invalidate dependents
 			oneOf(db).getMessageDependents(txn1, messageId);
-			will(returnValue(singletonMap(messageId2, UNKNOWN)));
+			will(returnValue(Collections.singletonMap(messageId2, UNKNOWN)));
 			oneOf(db).commitTransaction(txn1);
 			oneOf(db).endTransaction(txn1);
 			// Invalidate dependent in a new transaction
@@ -679,7 +706,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).deleteMessage(txn2, messageId2);
 			oneOf(db).deleteMessageMetadata(txn2, messageId2);
 			oneOf(db).getMessageDependents(txn2, messageId2);
-			will(returnValue(emptyMap()));
+			will(returnValue(Collections.emptyMap()));
 			oneOf(db).commitTransaction(txn2);
 			oneOf(db).endTransaction(txn2);
 		}});
@@ -736,7 +763,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).deleteMessageMetadata(txn2, messageId1);
 			// Message 1 has one dependent: 3
 			oneOf(db).getMessageDependents(txn2, messageId1);
-			will(returnValue(singletonMap(messageId3, PENDING)));
+			will(returnValue(Collections.singletonMap(messageId3, PENDING)));
 			oneOf(db).commitTransaction(txn2);
 			oneOf(db).endTransaction(txn2);
 			// Invalidate message 2
@@ -749,7 +776,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).deleteMessageMetadata(txn3, messageId2);
 			// Message 2 has one dependent: 3 (same dependent as 1)
 			oneOf(db).getMessageDependents(txn3, messageId2);
-			will(returnValue(singletonMap(messageId3, PENDING)));
+			will(returnValue(Collections.singletonMap(messageId3, PENDING)));
 			oneOf(db).commitTransaction(txn3);
 			oneOf(db).endTransaction(txn3);
 			// Invalidate message 3 (via 1)
@@ -762,7 +789,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).deleteMessageMetadata(txn4, messageId3);
 			// Message 3 has one dependent: 4
 			oneOf(db).getMessageDependents(txn4, messageId3);
-			will(returnValue(singletonMap(messageId4, PENDING)));
+			will(returnValue(Collections.singletonMap(messageId4, PENDING)));
 			oneOf(db).commitTransaction(txn4);
 			oneOf(db).endTransaction(txn4);
 			// Invalidate message 3 (again, via 2)
@@ -782,7 +809,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).deleteMessageMetadata(txn6, messageId4);
 			// Message 4 has no dependents
 			oneOf(db).getMessageDependents(txn6, messageId4);
-			will(returnValue(emptyMap()));
+			will(returnValue(Collections.emptyMap()));
 			oneOf(db).commitTransaction(txn6);
 			oneOf(db).endTransaction(txn6);
 		}});
@@ -792,10 +819,12 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 
 	@Test
 	public void testPendingDependentsGetDelivered() throws Exception {
-		Message message3 = getMessage(groupId);
-		Message message4 = getMessage(groupId);
-		MessageId messageId3 = message3.getId();
-		MessageId messageId4 = message4.getId();
+		MessageId messageId3 = new MessageId(getRandomId());
+		MessageId messageId4 = new MessageId(getRandomId());
+		Message message3 = new Message(messageId3, groupId, timestamp,
+				raw);
+		Message message4 = new Message(messageId4, groupId, timestamp,
+				raw);
 		Map<MessageId, State> twoDependents = new LinkedHashMap<>();
 		twoDependents.put(messageId1, PENDING);
 		twoDependents.put(messageId2, PENDING);
@@ -840,9 +869,11 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).getMessageState(txn2, messageId1);
 			will(returnValue(PENDING));
 			oneOf(db).getMessageDependencies(txn2, messageId1);
-			will(returnValue(singletonMap(messageId, DELIVERED)));
+			will(returnValue(Collections.singletonMap(messageId, DELIVERED)));
 			// Get message 1 and its metadata
-			oneOf(db).getMessage(txn2, messageId1);
+			oneOf(db).getRawMessage(txn2, messageId1);
+			will(returnValue(raw));
+			oneOf(messageFactory).createMessage(messageId1, raw);
 			will(returnValue(message1));
 			oneOf(db).getGroup(txn2, groupId);
 			will(returnValue(group));
@@ -854,7 +885,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).setMessageState(txn2, messageId1, DELIVERED);
 			// Message 1 has one pending dependent: 3
 			oneOf(db).getMessageDependents(txn2, messageId1);
-			will(returnValue(singletonMap(messageId3, PENDING)));
+			will(returnValue(Collections.singletonMap(messageId3, PENDING)));
 			oneOf(db).commitTransaction(txn2);
 			oneOf(db).endTransaction(txn2);
 			// Check whether message 2 is ready to be delivered
@@ -863,9 +894,11 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).getMessageState(txn3, messageId2);
 			will(returnValue(PENDING));
 			oneOf(db).getMessageDependencies(txn3, messageId2);
-			will(returnValue(singletonMap(messageId, DELIVERED)));
+			will(returnValue(Collections.singletonMap(messageId, DELIVERED)));
 			// Get message 2 and its metadata
-			oneOf(db).getMessage(txn3, messageId2);
+			oneOf(db).getRawMessage(txn3, messageId2);
+			will(returnValue(raw));
+			oneOf(messageFactory).createMessage(messageId2, raw);
 			will(returnValue(message2));
 			oneOf(db).getGroup(txn3, groupId);
 			will(returnValue(group));
@@ -877,7 +910,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).setMessageState(txn3, messageId2, DELIVERED);
 			// Message 2 has one pending dependent: 3 (same dependent as 1)
 			oneOf(db).getMessageDependents(txn3, messageId2);
-			will(returnValue(singletonMap(messageId3, PENDING)));
+			will(returnValue(Collections.singletonMap(messageId3, PENDING)));
 			oneOf(db).commitTransaction(txn3);
 			oneOf(db).endTransaction(txn3);
 			// Check whether message 3 is ready to be delivered (via 1)
@@ -888,7 +921,9 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).getMessageDependencies(txn4, messageId3);
 			will(returnValue(twoDependencies));
 			// Get message 3 and its metadata
-			oneOf(db).getMessage(txn4, messageId3);
+			oneOf(db).getRawMessage(txn4, messageId3);
+			will(returnValue(raw));
+			oneOf(messageFactory).createMessage(messageId3, raw);
 			will(returnValue(message3));
 			oneOf(db).getGroup(txn4, groupId);
 			will(returnValue(group));
@@ -899,7 +934,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).setMessageState(txn4, messageId3, DELIVERED);
 			// Message 3 has one pending dependent: 4
 			oneOf(db).getMessageDependents(txn4, messageId3);
-			will(returnValue(singletonMap(messageId4, PENDING)));
+			will(returnValue(Collections.singletonMap(messageId4, PENDING)));
 			oneOf(db).commitTransaction(txn4);
 			oneOf(db).endTransaction(txn4);
 			// Check whether message 3 is ready to be delivered (again, via 2)
@@ -915,9 +950,11 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).getMessageState(txn6, messageId4);
 			will(returnValue(PENDING));
 			oneOf(db).getMessageDependencies(txn6, messageId4);
-			will(returnValue(singletonMap(messageId3, DELIVERED)));
+			will(returnValue(Collections.singletonMap(messageId3, DELIVERED)));
 			// Get message 4 and its metadata
-			oneOf(db).getMessage(txn6, messageId4);
+			oneOf(db).getRawMessage(txn6, messageId4);
+			will(returnValue(raw));
+			oneOf(messageFactory).createMessage(messageId4, raw);
 			will(returnValue(message4));
 			oneOf(db).getGroup(txn6, groupId);
 			will(returnValue(group));
@@ -929,7 +966,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).setMessageState(txn6, messageId4, DELIVERED);
 			// Message 4 has no pending dependents
 			oneOf(db).getMessageDependents(txn6, messageId4);
-			will(returnValue(emptyMap()));
+			will(returnValue(Collections.emptyMap()));
 			oneOf(db).commitTransaction(txn6);
 			oneOf(db).endTransaction(txn6);
 		}});
@@ -967,7 +1004,7 @@ public class ValidationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).setMessageState(txn1, messageId, DELIVERED);
 			// Get any pending dependents
 			oneOf(db).getMessageDependents(txn1, messageId);
-			will(returnValue(singletonMap(messageId1, PENDING)));
+			will(returnValue(Collections.singletonMap(messageId1, PENDING)));
 			oneOf(db).commitTransaction(txn1);
 			oneOf(db).endTransaction(txn1);
 			// Check whether the pending dependent is ready to be delivered

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

@@ -1,30 +0,0 @@
-package org.briarproject.bramble.test;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.GroupId;
-import org.briarproject.bramble.api.sync.Message;
-import org.briarproject.bramble.api.sync.MessageFactory;
-
-import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
-
-@NotNullByDefault
-public class TestMessageFactory implements MessageFactory {
-
-	@Override
-	public Message createMessage(GroupId g, long timestamp, byte[] body) {
-		throw new UnsupportedOperationException();
-	}
-
-	@Override
-	public Message createMessage(byte[] raw) {
-		throw new UnsupportedOperationException();
-	}
-
-	@Override
-	public byte[] getRawMessage(Message m) {
-		byte[] body = m.getBody();
-		byte[] raw = new byte[MESSAGE_HEADER_LENGTH + body.length];
-		System.arraycopy(body, 0, raw, MESSAGE_HEADER_LENGTH, body.length);
-		return raw;
-	}
-}

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

@@ -30,6 +30,7 @@ public abstract class ValidatorTestCase extends BrambleMockTestCase {
 	protected final Message message = getMessage(groupId);
 	protected final MessageId messageId = message.getId();
 	protected final long timestamp = message.getTimestamp();
+	protected final byte[] raw = message.getRaw();
 	protected final Author author = getAuthor();
 	protected final BdfList authorList = BdfList.of(
 			author.getFormatVersion(),

bramble-j2se/.gitignore

@@ -0,0 +1,3 @@
+bin
+build
+.settings

bramble-j2se/build.gradle

@@ -7,16 +7,11 @@ apply plugin: 'idea'
 apply plugin: 'witness'
 apply from: 'witness.gradle'
 
-configurations {
-	tor
-}
-
 dependencies {
 	implementation project(path: ':bramble-core', configuration: 'default')
 	implementation fileTree(dir: 'libs', include: '*.jar')
 	implementation 'net.java.dev.jna:jna:4.4.0'
 	implementation 'net.java.dev.jna:jna-platform:4.4.0'
-	tor 'org.briarproject:tor:0.2.9.16@zip'
 
 	apt 'com.google.dagger:dagger-compiler:2.0.2'
 
@@ -28,17 +23,10 @@ dependencies {
 	testImplementation "org.jmock:jmock-legacy:2.8.2"
 	testImplementation "org.hamcrest:hamcrest-library:1.3"
 	testImplementation "org.hamcrest:hamcrest-core:1.3"
-
-	testApt 'com.google.dagger:dagger-compiler:2.0.2'
-}
-
-project.afterEvaluate {
-	copy {
-		from configurations.tor.collect { zipTree(it) }
-		into 'src/main/resources'
-	}
 }
 
 tasks.withType(Test) {
+	// Use entropy-gathering device specified on command line, if any
+	systemProperty 'java.security.egd', System.getProperty('java.security.egd')
 	systemProperty 'java.library.path', 'libs'
 }