Use /dev/urandom for tests.

Move gradle witness dependency verification into dedicated files

See merge request briar/briar!892

.gitlab-ci.yml

@@ -11,8 +11,8 @@ test:
       - .gradle/caches
 
   script:
-    - ./gradlew --no-daemon animalSnifferMain animalSnifferTest
+    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom animalSnifferMain animalSnifferTest
-    - ./gradlew --no-daemon test
+    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom test
 
   after_script:
     # these file change every time but should not be cached

bramble-android/build.gradle

@@ -1,5 +1,6 @@
 apply plugin: 'com.android.library'
 apply plugin: 'witness'
+apply from: 'witness.gradle'
 
 android {
 	compileSdkVersion 27
@@ -27,7 +28,6 @@ configurations {
 
 dependencies {
 	implementation project(path: ':bramble-core', configuration: 'default')
-	implementation 'org.briarproject:jtorctl:0.3'
 	tor 'org.briarproject:tor-android:0.2.9.16@zip'
 
 	annotationProcessor 'com.google.dagger:dagger-compiler:2.0.2'
@@ -49,105 +49,14 @@ dependencies {
 	androidTestCompileOnly 'javax.annotation:jsr250-api:1.0'
 }
 
-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',
-			'com.android.tools.build:apksig:3.1.3:apksig-3.1.3.jar:7e1f8e675a6e768e5b56405e41d6c3cc05befe62e601b04177de1029902c9c89',
-			'com.android.tools.build:builder-model:3.1.3:builder-model-3.1.3.jar:06ad1c422d679fc698451479cb40ba863849d67bfd1de23f6d2c16d78b024b0b',
-			'com.android.tools.build:builder-test-api:3.1.3:builder-test-api-3.1.3.jar:4d989f780436794f0f8b2f50e9e079b786571eac90f26c208ab2ae6d4012f389',
-			'com.android.tools.build:builder:3.1.3:builder-3.1.3.jar:8a1092012c89d0ec1ee2eff09c5708c71ef4482a6862df8d3a44a67fccace01c',
-			'com.android.tools.build:gradle-api:3.1.3:gradle-api-3.1.3.jar:01e4df521456aef66514336f1d492346730dd1fb8f6433a89f62da834941ed72',
-			'com.android.tools.build:manifest-merger:26.1.3:manifest-merger-26.1.3.jar:1e4fc7e932adb4607082409800e5e6fccb42e6c5360ae5990094bf522f3ada55',
-			'com.android.tools.ddms:ddmlib:26.1.3:ddmlib-26.1.3.jar:c54931cd68df5d1ea2923b3b320eae47cd2307a5a916bb8674c0acf93cd1d3cd',
-			'com.android.tools.external.com-intellij:intellij-core:26.1.3:intellij-core-26.1.3.jar:af67f5535fef2e1a28b1007a4acb8c5deb6a1e33b8afe7b11d012c9e778ebcec',
-			'com.android.tools.external.com-intellij:kotlin-compiler:26.1.3:kotlin-compiler-26.1.3.jar:c746d2859dc11cc05c84b692b3498d3a621e0929511f8440ee009c6557838fd4',
-			'com.android.tools.external.org-jetbrains:uast:26.1.3:uast-26.1.3.jar:3f3f6651d0c7685a77ecb22e9c82d6b49fdf24322c17360768dc530678f43265',
-			'com.android.tools.layoutlib:layoutlib-api:26.1.3:layoutlib-api-26.1.3.jar:10bc73ce706c45629872d6a999dbe12116df64e24f47ff93b7b13121ff57b4b0',
-			'com.android.tools.lint:lint-api:26.1.3:lint-api-26.1.3.jar:6f97323f9af8deda86278717885b5c927f3766757db89709f52d11d42b6fb751',
-			'com.android.tools.lint:lint-checks:26.1.3:lint-checks-26.1.3.jar:73c3d53784c9ce3e6d5968506581918e0179645d20809927ca4a001dd766b001',
-			'com.android.tools.lint:lint-gradle-api:26.1.3:lint-gradle-api-26.1.3.jar:7ca3c4866ec21dc21d53a9d86f752b77ace6f6c610a0c9dc877313856c733d9d',
-			'com.android.tools.lint:lint-gradle:26.1.3:lint-gradle-26.1.3.jar:db0c354b8f4b6f6637e31f91c564785a59ff896325331fcbc3de7458e0b6c067',
-			'com.android.tools.lint:lint-kotlin:26.1.3:lint-kotlin-26.1.3.jar:94e2b0f4565a241561cfb8fc1222bb3f132a3b98d2a90421dbb72ee8358e7d68',
-			'com.android.tools.lint:lint:26.1.3:lint-26.1.3.jar:8d5f32c989c6d191d712e90ad3ca2d1c409313599551d04d834caa44d26c78df',
-			'com.android.tools:annotations:26.1.3:annotations-26.1.3.jar:c950430b24ac5d58fc97e7283b8f0115f99587e76e08b4e1e2aaa780f2d77323',
-			'com.android.tools:common:26.1.3:common-26.1.3.jar:7c31a90581a148ab219f615a59667f0dded7fa39b248529784474da3c2274ef2',
-			'com.android.tools:dvlib:26.1.3:dvlib-26.1.3.jar:0cae87906f53d3f1088366a916ed180a7312b6d9919b90797f238875c8492855',
-			'com.android.tools:repository:26.1.3:repository-26.1.3.jar:52d4539cc68db91b261e2a33b2c8206b26e05539078758dc28cfb3854adb4f59',
-			'com.android.tools:sdk-common:26.1.3:sdk-common-26.1.3.jar:1948603ca9ff22c7ebb3178000bffa3a9dd2ca1cc5cb0c793cae08468b8fcfc1',
-			'com.android.tools:sdklib:26.1.3:sdklib-26.1.3.jar:4adcfaad9514607098d2c51503c39811112d3050f4d1e744c01c7f08f591032b',
-			'com.google.code.findbugs:jsr305:1.3.9:jsr305-1.3.9.jar:905721a0eea90a81534abb7ee6ef4ea2e5e645fa1def0a5cd88402df1b46c9ed',
-			'com.google.code.gson:gson:2.7:gson-2.7.jar:2d43eb5ea9e133d2ee2405cc14f5ee08951b8361302fdd93494a3a997b508d32',
-			'com.google.dagger:dagger-compiler:2.0.2:dagger-compiler-2.0.2.jar:b74bc9de063dd4c6400b232231f2ef5056145b8fbecbf5382012007dd1c071b3',
-			'com.google.dagger:dagger-producers:2.0-beta:dagger-producers-2.0-beta.jar:99ec15e8a0507ba569e7655bc1165ee5e5ca5aa914b3c8f7e2c2458f724edd6b',
-			'com.google.dagger:dagger:2.0.2:dagger-2.0.2.jar:84c0282ed8be73a29e0475d639da030b55dee72369e58dd35ae7d4fe6243dcf9',
-			'com.google.errorprone:error_prone_annotations:2.0.18:error_prone_annotations-2.0.18.jar:cb4cfad870bf563a07199f3ebea5763f0dec440fcda0b318640b1feaa788656b',
-			'com.google.guava:guava:18.0:guava-18.0.jar:d664fbfc03d2e5ce9cab2a44fb01f1d0bf9dfebeccc1a473b1f9ea31f79f6f99',
-			'com.google.guava:guava:22.0:guava-22.0.jar:1158e94c7de4da480873f0b4ab4a1da14c0d23d4b1902cc94a58a6f0f9ab579e',
-			'com.google.j2objc:j2objc-annotations:1.1:j2objc-annotations-1.1.jar:40ceb7157feb263949e0f503fe5f71689333a621021aa20ce0d0acee3badaa0f',
-			'com.google.jimfs:jimfs:1.1:jimfs-1.1.jar:c4828e28d7c0a930af9387510b3bada7daa5c04d7c25a75c7b8b081f1c257ddd',
-			'com.google.protobuf:protobuf-java:3.4.0:protobuf-java-3.4.0.jar:dce7e66b32456a1b1198da0caff3a8acb71548658391e798c79369241e6490a4',
-			'com.googlecode.json-simple:json-simple:1.1:json-simple-1.1.jar:2d9484f4c649f708f47f9a479465fc729770ee65617dca3011836602264f6439',
-			'com.squareup:javawriter:2.5.0:javawriter-2.5.0.jar:fcfb09fb0ea0aa97d3cfe7ea792398081348e468f126b3603cb3803f240197f0',
-			'com.sun.activation:javax.activation:1.2.0:javax.activation-1.2.0.jar:993302b16cd7056f21e779cc577d175a810bb4900ef73cd8fbf2b50f928ba9ce',
-			'com.sun.istack:istack-commons-runtime:2.21:istack-commons-runtime-2.21.jar:c33e67a0807095f02a0e2da139412dd7c4f9cc1a4c054b3e434f96831ba950f4',
-			'com.sun.xml.fastinfoset:FastInfoset:1.2.13:FastInfoset-1.2.13.jar:27a77db909f3c2833c0b1a37c55af1db06045118ad2eed96ce567b6632bce038',
-			'commons-codec:commons-codec:1.6:commons-codec-1.6.jar:54b34e941b8e1414bd3e40d736efd3481772dc26db3296f6aa45cec9f6203d86',
-			'commons-logging:commons-logging:1.1.1:commons-logging-1.1.1.jar:ce6f913cad1f0db3aad70186d65c5bc7ffcc9a99e3fe8e0b137312819f7c362f',
-			'it.unimi.dsi:fastutil:7.2.0:fastutil-7.2.0.jar:74fa208043740642f7e6eb09faba15965218ad2f50ce3020efb100136e4b591c',
-			'javax.annotation:jsr250-api:1.0:jsr250-api-1.0.jar:a1a922d0d9b6d183ed3800dfac01d1e1eb159f0e8c6f94736931c1def54a941f',
-			'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
-			'javax.xml.bind:jaxb-api:2.2.12-b140109.1041:jaxb-api-2.2.12-b140109.1041.jar:b5e60cd8b7b5ff01ce4a74c5dd008f4fbd14ced3495d0b47b85cfedc182211f2',
-			'junit:junit:4.12:junit-4.12.jar:59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a',
-			'net.sf.jopt-simple:jopt-simple:4.9:jopt-simple-4.9.jar:26c5856e954b5f864db76f13b86919b59c6eecf9fd930b96baa8884626baf2f5',
-			'net.sf.kxml:kxml2:2.3.0:kxml2-2.3.0.jar:f264dd9f79a1fde10ce5ecc53221eff24be4c9331c830b7d52f2f08a7b633de2',
-			'org.apache.ant:ant-launcher:1.9.4:ant-launcher-1.9.4.jar:7bccea20b41801ca17bcbc909a78c835d0f443f12d639c77bd6ae3d05861608d',
-			'org.apache.ant:ant:1.9.4:ant-1.9.4.jar:649ae0730251de07b8913f49286d46bba7b92d47c5f332610aa426c4f02161d8',
-			'org.apache.commons:commons-compress:1.12:commons-compress-1.12.jar:2c1542faf343185b7cab9c3d55c8ae5471d6d095d3887a4adefdbdf2984dc0b6',
-			'org.apache.httpcomponents:httpclient:4.2.6:httpclient-4.2.6.jar:362e9324ee7c697e21279e20077b52737ddef3f1b2c1a7abe5ad34b465145550',
-			'org.apache.httpcomponents:httpcore:4.2.5:httpcore-4.2.5.jar:e5e82da4cc66c8d917bbf743e3c0752efe8522735e7fc9dbddb65bccea81cfe9',
-			'org.apache.httpcomponents:httpmime:4.1:httpmime-4.1.jar:31629566148e8a47688ae43b420abc3ecd783ed15b33bebc00824bf24c9b15aa',
-			'org.beanshell:bsh:1.3.0:bsh-1.3.0.jar:9b04edc75d19db54f1b4e8b5355e9364384c6cf71eb0a1b9724c159d779879f8',
-			'org.bouncycastle:bcpkix-jdk15on:1.56:bcpkix-jdk15on-1.56.jar:7043dee4e9e7175e93e0b36f45b1ec1ecb893c5f755667e8b916eb8dd201c6ca',
-			'org.bouncycastle:bcprov-jdk15on:1.56:bcprov-jdk15on-1.56.jar:963e1ee14f808ffb99897d848ddcdb28fa91ddda867eb18d303e82728f878349',
-			'org.briarproject:jtorctl:0.3:jtorctl-0.3.jar:f2939238a097898998432effe93b0334d97a787972ab3a91a8973a1d309fc864',
-			'org.briarproject:tor-android:0.2.9.16:tor-android-0.2.9.16.zip:515e33dda6a30853c885a2de2c79ae1ab9ad8b6db44f5db8890333ec2e24f4ae',
-			'org.codehaus.groovy:groovy-all:2.4.12:groovy-all-2.4.12.jar:6a56af4bd48903d56bec62821876cadefafd007360cc6bd0d8f7aa8d72b38be4',
-			'org.codehaus.mojo:animal-sniffer-annotations:1.14:animal-sniffer-annotations-1.14.jar:2068320bd6bad744c3673ab048f67e30bef8f518996fa380033556600669905d',
-			'org.glassfish.jaxb:jaxb-core:2.2.11:jaxb-core-2.2.11.jar:37bcaee8ebb04362c8352a5bf6221b86967ecdab5164c696b10b9a2bb587b2aa',
-			'org.glassfish.jaxb:jaxb-runtime:2.2.11:jaxb-runtime-2.2.11.jar:a874f2351cfba8e2946be3002d10c18a6da8f21b52ba2acf52f2b85d5520ed70',
-			'org.glassfish.jaxb:txw2:2.2.11:txw2-2.2.11.jar:272a3ccad45a4511351920cd2a8633c53cab8d5220c7a92954da5526bb5eafea',
-			'org.hamcrest:hamcrest-core:1.3:hamcrest-core-1.3.jar:66fdef91e9739348df7a096aa384a5685f4e875584cce89386a7a47251c4d8e9',
-			'org.hamcrest:hamcrest-library:1.3:hamcrest-library-1.3.jar:711d64522f9ec410983bd310934296da134be4254a125080a0416ec178dfad1c',
-			'org.jetbrains.kotlin:kotlin-reflect:1.2.0:kotlin-reflect-1.2.0.jar:4f48a872bad6e4d9c053f4ad610d11e4012ad7e58dc19a03dd5eb811f36069dd',
-			'org.jetbrains.kotlin:kotlin-stdlib-jre7:1.2.0:kotlin-stdlib-jre7-1.2.0.jar:c7a20fb951d437797afe8980aff6c1e5a03f310c661ba58ba1d4fa90cb0f2926',
-			'org.jetbrains.kotlin:kotlin-stdlib-jre8:1.2.0:kotlin-stdlib-jre8-1.2.0.jar:633524eee6ef1941f7cb1dab7ee3927b0a221ceee9047aeb5515f4cbb990c82a',
-			'org.jetbrains.kotlin:kotlin-stdlib:1.2.0:kotlin-stdlib-1.2.0.jar:05cfd9f5ac0b41910703a8925f7211a495909b27a2ffdd1c5106f1689aeafcd4',
-			'org.jetbrains.trove4j:trove4j:20160824:trove4j-20160824.jar:1917871c8deb468307a584680c87a44572f5a8b0b98c6d397fc0f5f86596dbe7',
-			'org.jetbrains:annotations:13.0:annotations-13.0.jar:ace2a10dc8e2d5fd34925ecac03e4988b2c0f851650c94b8cef49ba1bd111478',
-			'org.jmock:jmock-junit4:2.8.2:jmock-junit4-2.8.2.jar:f7ee4df4f7bd7b7f1cafad3b99eb74d579f109d5992ff625347352edb55e674c',
-			'org.jmock:jmock-legacy:2.8.2:jmock-legacy-2.8.2.jar:f2b985a5c08a9edb7f37612330c058809da3f6a6d63ce792426ebf8ff0d6d31b',
-			'org.jmock:jmock-testjar:2.8.2:jmock-testjar-2.8.2.jar:8900860f72c474e027cf97fe78dcbf154a1aa7fc62b6845c5fb4e4f3c7bc8760',
-			'org.jmock:jmock:2.8.2:jmock-2.8.2.jar:6c73cb4a2e6dbfb61fd99c9a768539c170ab6568e57846bd60dbf19596b65b16',
-			'org.jvnet.staxex:stax-ex:1.7.7:stax-ex-1.7.7.jar:a31ff7d77163c0deb09e7fee59ad35ae44c2cee2cc8552a116ccd1583d813fb4',
-			'org.objenesis:objenesis:2.1:objenesis-2.1.jar:c74330cc6b806c804fd37e74487b4fe5d7c2750c5e15fbc6efa13bdee1bdef80',
-			'org.ow2.asm:asm-analysis:5.1:asm-analysis-5.1.jar:a34658f5c5de4b573eef21131cc32cc25f7b66407944f312b28ec2e56abb1fa9',
-			'org.ow2.asm:asm-commons:5.1:asm-commons-5.1.jar:97b3786e1f55e74bddf8ad102bf50e33bbcbc1f6b7fd7b36f0bbbb25cd4981be',
-			'org.ow2.asm:asm-tree:5.1:asm-tree-5.1.jar:c0de2bbc4cb8297419659813ecd4ed1d077ed1dd5c1f5544cc5143e493e84c10',
-			'org.ow2.asm:asm-util:5.1:asm-util-5.1.jar:ee032c39ae5e3cd099148fbba9a2124f9ed613e5cb93e03ee0fa8808ce364040',
-			'org.ow2.asm:asm:5.0.4:asm-5.0.4.jar:896618ed8ae62702521a78bc7be42b7c491a08e6920a15f89a3ecdec31e9a220',
-			'org.ow2.asm:asm:5.1:asm-5.1.jar:d2da399a9967c69f0a21739256fa79d284222c223082cacadc17372244764b54',
-	]
-}
-
 project.afterEvaluate {
 	copy {
 		from configurations.tor.collect { zipTree(it) }
 		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

@@ -9,6 +9,7 @@ import org.briarproject.bramble.api.plugin.BackoffFactory;
 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.BrambleAndroidIntegrationTestComponent;
 import org.briarproject.bramble.test.BrambleTestCase;
 import org.briarproject.bramble.test.DaggerBrambleAndroidIntegrationTestComponent;
@@ -40,43 +41,28 @@ public class BridgeTest extends BrambleTestCase {
 	private final static long TIMEOUT = SECONDS.toMillis(23);
 
 	private final static Logger LOG =
-			Logger.getLogger(BridgeTest.class.getSimpleName());
+			Logger.getLogger(BridgeTest.class.getName());
 
 	@Inject
 	NetworkManager networkManager;
 	@Inject
+	ResourceProvider resourceProvider;
+	@Inject
+	CircumventionProvider circumventionProvider;
+	@Inject
 	EventBus eventBus;
 	@Inject
 	BackoffFactory backoffFactory;
 	@Inject
 	Clock clock;
 
-	private final Context appContext = getTargetContext();
+	private final Context appContext =
-	private final CircumventionProvider circumventionProvider;
+			getTargetContext().getApplicationContext();
-	private final List<String> bridges;
-	private TorPluginFactory factory;
-	private volatile int currentBridge = 0;
 
-	public BridgeTest() {
+	private List<String> bridges;
-		super();
+	private AndroidTorPluginFactory factory;
-		circumventionProvider = new CircumventionProvider() {
-			@Override
-			public boolean isTorProbablyBlocked(String countryCode) {
-				return true;
-			}
 
-			@Override
+	private volatile String currentBridge = null;
-			public boolean doBridgesWork(String countryCode) {
-				return true;
-			}
-
-			@Override
-			public List<String> getBridges() {
-				return singletonList(bridges.get(currentBridge));
-			}
-		};
-		bridges = new CircumventionProviderImpl(appContext).getBridges();
-	}
 
 	@Before
 	public void setUp() {
@@ -89,28 +75,43 @@ public class BridgeTest extends BrambleTestCase {
 		LocationUtils locationUtils = () -> "US";
 		SocketFactory torSocketFactory = SocketFactory.getDefault();
 
-		factory = new TorPluginFactory(ioExecutor, scheduler, appContext,
+		bridges = circumventionProvider.getBridges();
+		CircumventionProvider bridgeProvider = new CircumventionProvider() {
+			@Override
+			public boolean isTorProbablyBlocked(String countryCode) {
+				return true;
+			}
+
+			@Override
+			public boolean doBridgesWork(String countryCode) {
+				return true;
+			}
+
+			@Override
+			public List<String> getBridges() {
+				return singletonList(currentBridge);
+			}
+		};
+		factory = new AndroidTorPluginFactory(ioExecutor, scheduler, appContext,
 				networkManager, locationUtils, eventBus, torSocketFactory,
-				backoffFactory, circumventionProvider, clock);
+				backoffFactory, resourceProvider, bridgeProvider, clock);
 	}
 
 	@Test
 	public void testBridges() throws Exception {
 		assertTrue(bridges.size() > 0);
 
-		for (int i = 0; i < bridges.size(); i++) {
+		for (String bridge : bridges) testBridge(bridge);
-			testBridge(i);
-		}
 	}
 
-	private void testBridge(int bridge) throws Exception {
+	private void testBridge(String bridge) throws Exception {
 		DuplexPlugin duplexPlugin =
 				factory.createPlugin(new TorPluginCallBack());
 		assertNotNull(duplexPlugin);
-		TorPlugin plugin = (TorPlugin) duplexPlugin;
+		AndroidTorPlugin plugin = (AndroidTorPlugin) duplexPlugin;
 
 		currentBridge = bridge;
-		LOG.warning("Testing " + bridges.get(currentBridge));
+		LOG.warning("Testing " + bridge);
 		try {
 			plugin.start();
 			long start = clock.currentTimeMillis();

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

@@ -1,20 +1,20 @@
 package org.briarproject.bramble.test;
 
 import android.app.Application;
-import android.support.test.InstrumentationRegistry;
 
 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) InstrumentationRegistry.getTargetContext()
+		return (Application) getTargetContext().getApplicationContext();
-						.getApplicationContext();
 	}
 }

bramble-android/src/main/java/org/briarproject/bramble/BrambleAndroidModule.java

@@ -1,27 +1,16 @@
 package org.briarproject.bramble;
 
-import android.app.Application;
-
 import org.briarproject.bramble.network.AndroidNetworkModule;
-import org.briarproject.bramble.plugin.tor.CircumventionProvider;
+import org.briarproject.bramble.plugin.tor.CircumventionModule;
-import org.briarproject.bramble.plugin.tor.CircumventionProviderImpl;
 import org.briarproject.bramble.system.AndroidSystemModule;
 
-import javax.inject.Singleton;
-
 import dagger.Module;
-import dagger.Provides;
 
 @Module(includes = {
 		AndroidNetworkModule.class,
-		AndroidSystemModule.class
+		AndroidSystemModule.class,
+		CircumventionModule.class
 })
 public class BrambleAndroidModule {
 
-	@Provides
-	@Singleton
-	CircumventionProvider provideCircumventionProvider(Application app) {
-		return new CircumventionProviderImpl(app.getApplicationContext());
-	}
-
 }

bramble-android/src/main/java/org/briarproject/bramble/network/AndroidNetworkManager.java

@@ -91,7 +91,7 @@ class AndroidNetworkManager implements NetworkManager, Service {
 	public NetworkStatus getNetworkStatus() {
 		ConnectivityManager cm = (ConnectivityManager)
 				appContext.getSystemService(CONNECTIVITY_SERVICE);
-		assert cm != null;
+		if (cm == null) throw new AssertionError();
 		NetworkInfo net = cm.getActiveNetworkInfo();
 		boolean connected = net != null && net.isConnected();
 		boolean wifi = connected && net.getType() == TYPE_WIFI;

bramble-android/src/main/java/org/briarproject/bramble/plugin/tcp/AndroidLanTcpPlugin.java

@@ -68,7 +68,7 @@ class AndroidLanTcpPlugin extends LanTcpPlugin implements EventListener {
 				new PoliteExecutor("AndroidLanTcpPlugin", ioExecutor, 1);
 		ConnectivityManager connectivityManager = (ConnectivityManager)
 				appContext.getSystemService(CONNECTIVITY_SERVICE);
-		assert connectivityManager != null;
+		if (connectivityManager == null) throw new AssertionError();
 		this.connectivityManager = connectivityManager;
 		wifiManager = (WifiManager) appContext.getApplicationContext()
 				.getSystemService(WIFI_SERVICE);

bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/AndroidTorPlugin.java

@@ -0,0 +1,88 @@
+package org.briarproject.bramble.plugin.tor;
+
+import android.content.Context;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.os.PowerManager;
+
+import org.briarproject.bramble.api.network.NetworkManager;
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.bramble.api.plugin.Backoff;
+import org.briarproject.bramble.api.plugin.duplex.DuplexPluginCallback;
+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.util.RenewableWakeLock;
+
+import java.io.IOException;
+import java.util.concurrent.Executor;
+import java.util.concurrent.ScheduledExecutorService;
+
+import javax.net.SocketFactory;
+
+import static android.content.Context.MODE_PRIVATE;
+import static android.content.Context.POWER_SERVICE;
+import static android.os.PowerManager.PARTIAL_WAKE_LOCK;
+import static java.util.concurrent.TimeUnit.MINUTES;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+class AndroidTorPlugin extends TorPlugin {
+
+	// This tag may prevent Huawei's power manager from killing us
+	private static final String WAKE_LOCK_TAG = "LocationManagerService";
+
+	private final Context appContext;
+	private final RenewableWakeLock wakeLock;
+
+	AndroidTorPlugin(Executor ioExecutor, ScheduledExecutorService scheduler,
+			Context appContext, NetworkManager networkManager,
+			LocationUtils locationUtils, SocketFactory torSocketFactory,
+			Clock clock, ResourceProvider resourceProvider,
+			CircumventionProvider circumventionProvider, Backoff backoff,
+			DuplexPluginCallback callback, String architecture, int maxLatency,
+			int maxIdleTime) {
+		super(ioExecutor, networkManager, locationUtils, torSocketFactory,
+				clock, resourceProvider, circumventionProvider, backoff,
+				callback, architecture, maxLatency, maxIdleTime,
+				appContext.getDir("tor", MODE_PRIVATE));
+		this.appContext = appContext;
+		PowerManager pm = (PowerManager)
+				appContext.getSystemService(POWER_SERVICE);
+		assert pm != null;
+		wakeLock = new RenewableWakeLock(pm, scheduler, PARTIAL_WAKE_LOCK,
+				WAKE_LOCK_TAG, 1, MINUTES);
+	}
+
+	@Override
+	protected int getProcessId() {
+		return android.os.Process.myPid();
+	}
+
+	@Override
+	protected long getLastUpdateTime() {
+		try {
+			PackageManager pm = appContext.getPackageManager();
+			PackageInfo pi = pm.getPackageInfo(appContext.getPackageName(), 0);
+			return pi.lastUpdateTime;
+		} catch (NameNotFoundException e) {
+			throw new AssertionError(e);
+		}
+	}
+
+	@Override
+	protected void enableNetwork(boolean enable) throws IOException {
+		if (!running) return;
+		if (enable) wakeLock.acquire();
+		super.enableNetwork(enable);
+		if (!enable) wakeLock.release();
+	}
+
+	@Override
+	public void stop() {
+		super.stop();
+		wakeLock.release();
+	}
+}

bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/AndroidTorPluginFactory.java

@@ -15,6 +15,7 @@ import org.briarproject.bramble.api.plugin.duplex.DuplexPluginCallback;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
 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.util.AndroidUtils;
 
 import java.util.concurrent.Executor;
@@ -26,10 +27,10 @@ import javax.net.SocketFactory;
 
 @Immutable
 @NotNullByDefault
-public class TorPluginFactory implements DuplexPluginFactory {
+public class AndroidTorPluginFactory implements DuplexPluginFactory {
 
 	private static final Logger LOG =
-			Logger.getLogger(TorPluginFactory.class.getName());
+			Logger.getLogger(AndroidTorPluginFactory.class.getName());
 
 	private static final int MAX_LATENCY = 30 * 1000; // 30 seconds
 	private static final int MAX_IDLE_TIME = 30 * 1000; // 30 seconds
@@ -45,14 +46,15 @@ public class TorPluginFactory implements DuplexPluginFactory {
 	private final EventBus eventBus;
 	private final SocketFactory torSocketFactory;
 	private final BackoffFactory backoffFactory;
+	private final ResourceProvider resourceProvider;
 	private final CircumventionProvider circumventionProvider;
 	private final Clock clock;
 
-	public TorPluginFactory(Executor ioExecutor,
+	public AndroidTorPluginFactory(Executor ioExecutor,
 			ScheduledExecutorService scheduler, Context appContext,
 			NetworkManager networkManager, LocationUtils locationUtils,
 			EventBus eventBus, SocketFactory torSocketFactory,
-			BackoffFactory backoffFactory,
+			BackoffFactory backoffFactory, ResourceProvider resourceProvider,
 			CircumventionProvider circumventionProvider, Clock clock) {
 		this.ioExecutor = ioExecutor;
 		this.scheduler = scheduler;
@@ -62,6 +64,7 @@ public class TorPluginFactory implements DuplexPluginFactory {
 		this.eventBus = eventBus;
 		this.torSocketFactory = torSocketFactory;
 		this.backoffFactory = backoffFactory;
+		this.resourceProvider = resourceProvider;
 		this.circumventionProvider = circumventionProvider;
 		this.clock = clock;
 	}
@@ -99,10 +102,10 @@ public class TorPluginFactory implements DuplexPluginFactory {
 
 		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
 				MAX_POLLING_INTERVAL, BACKOFF_BASE);
-		TorPlugin plugin = new TorPlugin(ioExecutor, scheduler, appContext,
+		AndroidTorPlugin plugin = new AndroidTorPlugin(ioExecutor, scheduler,
-				networkManager, locationUtils, torSocketFactory, clock,
+				appContext, networkManager, locationUtils, torSocketFactory,
-				circumventionProvider, backoff, callback, architecture,
+				clock, resourceProvider, circumventionProvider, backoff,
-				MAX_LATENCY, MAX_IDLE_TIME);
+				callback, architecture, MAX_LATENCY, MAX_IDLE_TIME);
 		eventBus.addListener(plugin);
 		return plugin;
 	}

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

@@ -0,0 +1,30 @@
+package org.briarproject.bramble.system;
+
+import android.app.Application;
+import android.content.Context;
+import android.content.res.Resources;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.system.ResourceProvider;
+
+import java.io.InputStream;
+
+import javax.inject.Inject;
+
+@NotNullByDefault
+class AndroidResourceProvider implements ResourceProvider {
+
+	private final Context appContext;
+
+	@Inject
+	AndroidResourceProvider(Application app) {
+		this.appContext = app.getApplicationContext();
+	}
+
+	@Override
+	public InputStream getResourceInputStream(String name) {
+		Resources res = appContext.getResources();
+		int resId = res.getIdentifier(name, "raw", appContext.getPackageName());
+		return res.openRawResource(resId);
+	}
+}

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

@@ -1,9 +1,8 @@
 package org.briarproject.bramble.system;
 
-import android.app.Application;
-
 import org.briarproject.bramble.api.system.AndroidExecutor;
 import org.briarproject.bramble.api.system.LocationUtils;
+import org.briarproject.bramble.api.system.ResourceProvider;
 import org.briarproject.bramble.api.system.SecureRandomProvider;
 
 import javax.inject.Singleton;
@@ -16,18 +15,26 @@ public class AndroidSystemModule {
 
 	@Provides
 	@Singleton
-	SecureRandomProvider provideSecureRandomProvider(Application app) {
+	SecureRandomProvider provideSecureRandomProvider(
-		return new AndroidSecureRandomProvider(app);
+			AndroidSecureRandomProvider provider) {
+		return provider;
 	}
 
 	@Provides
-	LocationUtils provideLocationUtils(Application app) {
+	LocationUtils provideLocationUtils(AndroidLocationUtils locationUtils) {
-		return new AndroidLocationUtils(app);
+		return locationUtils;
 	}
 
 	@Provides
 	@Singleton
-	AndroidExecutor provideAndroidExecutor(Application app) {
+	AndroidExecutor provideAndroidExecutor(
-		return new AndroidExecutorImpl(app);
+			AndroidExecutorImpl androidExecutor) {
+		return androidExecutor;
+	}
+
+	@Provides
+	@Singleton
+	ResourceProvider provideResourceProvider(AndroidResourceProvider provider) {
+		return provider;
 	}
 }

bramble-android/witness.gradle

@@ -0,0 +1,94 @@
+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',
+        'com.android.tools.build:apksig:3.1.3:apksig-3.1.3.jar:7e1f8e675a6e768e5b56405e41d6c3cc05befe62e601b04177de1029902c9c89',
+        'com.android.tools.build:builder-model:3.1.3:builder-model-3.1.3.jar:06ad1c422d679fc698451479cb40ba863849d67bfd1de23f6d2c16d78b024b0b',
+        'com.android.tools.build:builder-test-api:3.1.3:builder-test-api-3.1.3.jar:4d989f780436794f0f8b2f50e9e079b786571eac90f26c208ab2ae6d4012f389',
+        'com.android.tools.build:builder:3.1.3:builder-3.1.3.jar:8a1092012c89d0ec1ee2eff09c5708c71ef4482a6862df8d3a44a67fccace01c',
+        'com.android.tools.build:gradle-api:3.1.3:gradle-api-3.1.3.jar:01e4df521456aef66514336f1d492346730dd1fb8f6433a89f62da834941ed72',
+        'com.android.tools.build:manifest-merger:26.1.3:manifest-merger-26.1.3.jar:1e4fc7e932adb4607082409800e5e6fccb42e6c5360ae5990094bf522f3ada55',
+        'com.android.tools.ddms:ddmlib:26.1.3:ddmlib-26.1.3.jar:c54931cd68df5d1ea2923b3b320eae47cd2307a5a916bb8674c0acf93cd1d3cd',
+        'com.android.tools.external.com-intellij:intellij-core:26.1.3:intellij-core-26.1.3.jar:af67f5535fef2e1a28b1007a4acb8c5deb6a1e33b8afe7b11d012c9e778ebcec',
+        'com.android.tools.external.com-intellij:kotlin-compiler:26.1.3:kotlin-compiler-26.1.3.jar:c746d2859dc11cc05c84b692b3498d3a621e0929511f8440ee009c6557838fd4',
+        'com.android.tools.external.org-jetbrains:uast:26.1.3:uast-26.1.3.jar:3f3f6651d0c7685a77ecb22e9c82d6b49fdf24322c17360768dc530678f43265',
+        'com.android.tools.layoutlib:layoutlib-api:26.1.3:layoutlib-api-26.1.3.jar:10bc73ce706c45629872d6a999dbe12116df64e24f47ff93b7b13121ff57b4b0',
+        'com.android.tools.lint:lint-api:26.1.3:lint-api-26.1.3.jar:6f97323f9af8deda86278717885b5c927f3766757db89709f52d11d42b6fb751',
+        'com.android.tools.lint:lint-checks:26.1.3:lint-checks-26.1.3.jar:73c3d53784c9ce3e6d5968506581918e0179645d20809927ca4a001dd766b001',
+        'com.android.tools.lint:lint-gradle-api:26.1.3:lint-gradle-api-26.1.3.jar:7ca3c4866ec21dc21d53a9d86f752b77ace6f6c610a0c9dc877313856c733d9d',
+        'com.android.tools.lint:lint-gradle:26.1.3:lint-gradle-26.1.3.jar:db0c354b8f4b6f6637e31f91c564785a59ff896325331fcbc3de7458e0b6c067',
+        'com.android.tools.lint:lint-kotlin:26.1.3:lint-kotlin-26.1.3.jar:94e2b0f4565a241561cfb8fc1222bb3f132a3b98d2a90421dbb72ee8358e7d68',
+        'com.android.tools.lint:lint:26.1.3:lint-26.1.3.jar:8d5f32c989c6d191d712e90ad3ca2d1c409313599551d04d834caa44d26c78df',
+        'com.android.tools:annotations:26.1.3:annotations-26.1.3.jar:c950430b24ac5d58fc97e7283b8f0115f99587e76e08b4e1e2aaa780f2d77323',
+        'com.android.tools:common:26.1.3:common-26.1.3.jar:7c31a90581a148ab219f615a59667f0dded7fa39b248529784474da3c2274ef2',
+        'com.android.tools:dvlib:26.1.3:dvlib-26.1.3.jar:0cae87906f53d3f1088366a916ed180a7312b6d9919b90797f238875c8492855',
+        'com.android.tools:repository:26.1.3:repository-26.1.3.jar:52d4539cc68db91b261e2a33b2c8206b26e05539078758dc28cfb3854adb4f59',
+        'com.android.tools:sdk-common:26.1.3:sdk-common-26.1.3.jar:1948603ca9ff22c7ebb3178000bffa3a9dd2ca1cc5cb0c793cae08468b8fcfc1',
+        'com.android.tools:sdklib:26.1.3:sdklib-26.1.3.jar:4adcfaad9514607098d2c51503c39811112d3050f4d1e744c01c7f08f591032b',
+        'com.google.code.findbugs:jsr305:1.3.9:jsr305-1.3.9.jar:905721a0eea90a81534abb7ee6ef4ea2e5e645fa1def0a5cd88402df1b46c9ed',
+        'com.google.code.gson:gson:2.7:gson-2.7.jar:2d43eb5ea9e133d2ee2405cc14f5ee08951b8361302fdd93494a3a997b508d32',
+        'com.google.dagger:dagger-compiler:2.0.2:dagger-compiler-2.0.2.jar:b74bc9de063dd4c6400b232231f2ef5056145b8fbecbf5382012007dd1c071b3',
+        'com.google.dagger:dagger-producers:2.0-beta:dagger-producers-2.0-beta.jar:99ec15e8a0507ba569e7655bc1165ee5e5ca5aa914b3c8f7e2c2458f724edd6b',
+        'com.google.dagger:dagger:2.0.2:dagger-2.0.2.jar:84c0282ed8be73a29e0475d639da030b55dee72369e58dd35ae7d4fe6243dcf9',
+        'com.google.errorprone:error_prone_annotations:2.0.18:error_prone_annotations-2.0.18.jar:cb4cfad870bf563a07199f3ebea5763f0dec440fcda0b318640b1feaa788656b',
+        'com.google.guava:guava:18.0:guava-18.0.jar:d664fbfc03d2e5ce9cab2a44fb01f1d0bf9dfebeccc1a473b1f9ea31f79f6f99',
+        'com.google.guava:guava:22.0:guava-22.0.jar:1158e94c7de4da480873f0b4ab4a1da14c0d23d4b1902cc94a58a6f0f9ab579e',
+        'com.google.j2objc:j2objc-annotations:1.1:j2objc-annotations-1.1.jar:40ceb7157feb263949e0f503fe5f71689333a621021aa20ce0d0acee3badaa0f',
+        'com.google.jimfs:jimfs:1.1:jimfs-1.1.jar:c4828e28d7c0a930af9387510b3bada7daa5c04d7c25a75c7b8b081f1c257ddd',
+        'com.google.protobuf:protobuf-java:3.4.0:protobuf-java-3.4.0.jar:dce7e66b32456a1b1198da0caff3a8acb71548658391e798c79369241e6490a4',
+        'com.googlecode.json-simple:json-simple:1.1:json-simple-1.1.jar:2d9484f4c649f708f47f9a479465fc729770ee65617dca3011836602264f6439',
+        'com.squareup:javawriter:2.5.0:javawriter-2.5.0.jar:fcfb09fb0ea0aa97d3cfe7ea792398081348e468f126b3603cb3803f240197f0',
+        'com.sun.activation:javax.activation:1.2.0:javax.activation-1.2.0.jar:993302b16cd7056f21e779cc577d175a810bb4900ef73cd8fbf2b50f928ba9ce',
+        'com.sun.istack:istack-commons-runtime:2.21:istack-commons-runtime-2.21.jar:c33e67a0807095f02a0e2da139412dd7c4f9cc1a4c054b3e434f96831ba950f4',
+        'com.sun.xml.fastinfoset:FastInfoset:1.2.13:FastInfoset-1.2.13.jar:27a77db909f3c2833c0b1a37c55af1db06045118ad2eed96ce567b6632bce038',
+        'commons-codec:commons-codec:1.6:commons-codec-1.6.jar:54b34e941b8e1414bd3e40d736efd3481772dc26db3296f6aa45cec9f6203d86',
+        'commons-logging:commons-logging:1.1.1:commons-logging-1.1.1.jar:ce6f913cad1f0db3aad70186d65c5bc7ffcc9a99e3fe8e0b137312819f7c362f',
+        'it.unimi.dsi:fastutil:7.2.0:fastutil-7.2.0.jar:74fa208043740642f7e6eb09faba15965218ad2f50ce3020efb100136e4b591c',
+        'javax.annotation:jsr250-api:1.0:jsr250-api-1.0.jar:a1a922d0d9b6d183ed3800dfac01d1e1eb159f0e8c6f94736931c1def54a941f',
+        'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
+        'javax.xml.bind:jaxb-api:2.2.12-b140109.1041:jaxb-api-2.2.12-b140109.1041.jar:b5e60cd8b7b5ff01ce4a74c5dd008f4fbd14ced3495d0b47b85cfedc182211f2',
+        'junit:junit:4.12:junit-4.12.jar:59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a',
+        'net.sf.jopt-simple:jopt-simple:4.9:jopt-simple-4.9.jar:26c5856e954b5f864db76f13b86919b59c6eecf9fd930b96baa8884626baf2f5',
+        'net.sf.kxml:kxml2:2.3.0:kxml2-2.3.0.jar:f264dd9f79a1fde10ce5ecc53221eff24be4c9331c830b7d52f2f08a7b633de2',
+        'org.apache.ant:ant-launcher:1.9.4:ant-launcher-1.9.4.jar:7bccea20b41801ca17bcbc909a78c835d0f443f12d639c77bd6ae3d05861608d',
+        'org.apache.ant:ant:1.9.4:ant-1.9.4.jar:649ae0730251de07b8913f49286d46bba7b92d47c5f332610aa426c4f02161d8',
+        'org.apache.commons:commons-compress:1.12:commons-compress-1.12.jar:2c1542faf343185b7cab9c3d55c8ae5471d6d095d3887a4adefdbdf2984dc0b6',
+        'org.apache.httpcomponents:httpclient:4.2.6:httpclient-4.2.6.jar:362e9324ee7c697e21279e20077b52737ddef3f1b2c1a7abe5ad34b465145550',
+        'org.apache.httpcomponents:httpcore:4.2.5:httpcore-4.2.5.jar:e5e82da4cc66c8d917bbf743e3c0752efe8522735e7fc9dbddb65bccea81cfe9',
+        'org.apache.httpcomponents:httpmime:4.1:httpmime-4.1.jar:31629566148e8a47688ae43b420abc3ecd783ed15b33bebc00824bf24c9b15aa',
+        'org.beanshell:bsh:1.3.0:bsh-1.3.0.jar:9b04edc75d19db54f1b4e8b5355e9364384c6cf71eb0a1b9724c159d779879f8',
+        'org.bouncycastle:bcpkix-jdk15on:1.56:bcpkix-jdk15on-1.56.jar:7043dee4e9e7175e93e0b36f45b1ec1ecb893c5f755667e8b916eb8dd201c6ca',
+        'org.bouncycastle:bcprov-jdk15on:1.56:bcprov-jdk15on-1.56.jar:963e1ee14f808ffb99897d848ddcdb28fa91ddda867eb18d303e82728f878349',
+        'org.briarproject:tor-android:0.2.9.16:tor-android-0.2.9.16.zip:515e33dda6a30853c885a2de2c79ae1ab9ad8b6db44f5db8890333ec2e24f4ae',
+        'org.codehaus.groovy:groovy-all:2.4.12:groovy-all-2.4.12.jar:6a56af4bd48903d56bec62821876cadefafd007360cc6bd0d8f7aa8d72b38be4',
+        'org.codehaus.mojo:animal-sniffer-annotations:1.14:animal-sniffer-annotations-1.14.jar:2068320bd6bad744c3673ab048f67e30bef8f518996fa380033556600669905d',
+        'org.glassfish.jaxb:jaxb-core:2.2.11:jaxb-core-2.2.11.jar:37bcaee8ebb04362c8352a5bf6221b86967ecdab5164c696b10b9a2bb587b2aa',
+        'org.glassfish.jaxb:jaxb-runtime:2.2.11:jaxb-runtime-2.2.11.jar:a874f2351cfba8e2946be3002d10c18a6da8f21b52ba2acf52f2b85d5520ed70',
+        'org.glassfish.jaxb:txw2:2.2.11:txw2-2.2.11.jar:272a3ccad45a4511351920cd2a8633c53cab8d5220c7a92954da5526bb5eafea',
+        'org.hamcrest:hamcrest-core:1.3:hamcrest-core-1.3.jar:66fdef91e9739348df7a096aa384a5685f4e875584cce89386a7a47251c4d8e9',
+        'org.hamcrest:hamcrest-library:1.3:hamcrest-library-1.3.jar:711d64522f9ec410983bd310934296da134be4254a125080a0416ec178dfad1c',
+        'org.jetbrains.kotlin:kotlin-reflect:1.2.0:kotlin-reflect-1.2.0.jar:4f48a872bad6e4d9c053f4ad610d11e4012ad7e58dc19a03dd5eb811f36069dd',
+        'org.jetbrains.kotlin:kotlin-stdlib-jre7:1.2.0:kotlin-stdlib-jre7-1.2.0.jar:c7a20fb951d437797afe8980aff6c1e5a03f310c661ba58ba1d4fa90cb0f2926',
+        'org.jetbrains.kotlin:kotlin-stdlib-jre8:1.2.0:kotlin-stdlib-jre8-1.2.0.jar:633524eee6ef1941f7cb1dab7ee3927b0a221ceee9047aeb5515f4cbb990c82a',
+        'org.jetbrains.kotlin:kotlin-stdlib:1.2.0:kotlin-stdlib-1.2.0.jar:05cfd9f5ac0b41910703a8925f7211a495909b27a2ffdd1c5106f1689aeafcd4',
+        'org.jetbrains.trove4j:trove4j:20160824:trove4j-20160824.jar:1917871c8deb468307a584680c87a44572f5a8b0b98c6d397fc0f5f86596dbe7',
+        'org.jetbrains:annotations:13.0:annotations-13.0.jar:ace2a10dc8e2d5fd34925ecac03e4988b2c0f851650c94b8cef49ba1bd111478',
+        'org.jmock:jmock-junit4:2.8.2:jmock-junit4-2.8.2.jar:f7ee4df4f7bd7b7f1cafad3b99eb74d579f109d5992ff625347352edb55e674c',
+        'org.jmock:jmock-legacy:2.8.2:jmock-legacy-2.8.2.jar:f2b985a5c08a9edb7f37612330c058809da3f6a6d63ce792426ebf8ff0d6d31b',
+        'org.jmock:jmock-testjar:2.8.2:jmock-testjar-2.8.2.jar:8900860f72c474e027cf97fe78dcbf154a1aa7fc62b6845c5fb4e4f3c7bc8760',
+        'org.jmock:jmock:2.8.2:jmock-2.8.2.jar:6c73cb4a2e6dbfb61fd99c9a768539c170ab6568e57846bd60dbf19596b65b16',
+        'org.jvnet.staxex:stax-ex:1.7.7:stax-ex-1.7.7.jar:a31ff7d77163c0deb09e7fee59ad35ae44c2cee2cc8552a116ccd1583d813fb4',
+        'org.objenesis:objenesis:2.1:objenesis-2.1.jar:c74330cc6b806c804fd37e74487b4fe5d7c2750c5e15fbc6efa13bdee1bdef80',
+        'org.ow2.asm:asm-analysis:5.1:asm-analysis-5.1.jar:a34658f5c5de4b573eef21131cc32cc25f7b66407944f312b28ec2e56abb1fa9',
+        'org.ow2.asm:asm-commons:5.1:asm-commons-5.1.jar:97b3786e1f55e74bddf8ad102bf50e33bbcbc1f6b7fd7b36f0bbbb25cd4981be',
+        'org.ow2.asm:asm-tree:5.1:asm-tree-5.1.jar:c0de2bbc4cb8297419659813ecd4ed1d077ed1dd5c1f5544cc5143e493e84c10',
+        'org.ow2.asm:asm-util:5.1:asm-util-5.1.jar:ee032c39ae5e3cd099148fbba9a2124f9ed613e5cb93e03ee0fa8808ce364040',
+        'org.ow2.asm:asm:5.0.4:asm-5.0.4.jar:896618ed8ae62702521a78bc7be42b7c491a08e6920a15f89a3ecdec31e9a220',
+        'org.ow2.asm:asm:5.1:asm-5.1.jar:d2da399a9967c69f0a21739256fa79d284222c223082cacadc17372244764b54',
+    ]
+}

bramble-api/build.gradle

@@ -4,6 +4,7 @@ targetCompatibility = 1.8
 
 apply plugin: 'ru.vyarus.animalsniffer'
 apply plugin: 'witness'
+apply from: 'witness.gradle'
 
 dependencies {
 	implementation "com.google.dagger:dagger:2.0.2"
@@ -19,31 +20,6 @@ dependencies {
 	signature 'org.codehaus.mojo.signature:java16:1.1@signature'
 }
 
-dependencyVerification {
-	verify = [
-			'cglib:cglib:3.2.0:cglib-3.2.0.jar:adb13bab79712ad6bdf1bd59f2a3918018a8016e722e8a357065afb9e6690861',
-			'com.google.code.findbugs:jsr305:3.0.2:jsr305-3.0.2.jar:766ad2a0783f2687962c8ad74ceecc38a28b9f72a2d085ee438b7813e928d0c7',
-			'com.google.dagger:dagger:2.0.2:dagger-2.0.2.jar:84c0282ed8be73a29e0475d639da030b55dee72369e58dd35ae7d4fe6243dcf9',
-			'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
-			'junit:junit:4.12:junit-4.12.jar:59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a',
-			'org.apache.ant:ant-launcher:1.9.4:ant-launcher-1.9.4.jar:7bccea20b41801ca17bcbc909a78c835d0f443f12d639c77bd6ae3d05861608d',
-			'org.apache.ant:ant:1.9.4:ant-1.9.4.jar:649ae0730251de07b8913f49286d46bba7b92d47c5f332610aa426c4f02161d8',
-			'org.beanshell:bsh:1.3.0:bsh-1.3.0.jar:9b04edc75d19db54f1b4e8b5355e9364384c6cf71eb0a1b9724c159d779879f8',
-			'org.codehaus.mojo.signature:java16:1.1:java16-1.1.signature:53799223a2c98dba2d0add810bed76315460df285c69e4f397ae6098f87dd619',
-			'org.codehaus.mojo:animal-sniffer-ant-tasks:1.16:animal-sniffer-ant-tasks-1.16.jar:890040976fbe2d584619a6a61b1fd2e925b3b5eb342a85eb2762c467c0d64e90',
-			'org.codehaus.mojo:animal-sniffer:1.16:animal-sniffer-1.16.jar:72be8bcc226ba43b937c722a08a07852bfa1b11400089265d5df0ee7b38b1d52',
-			'org.hamcrest:hamcrest-core:1.3:hamcrest-core-1.3.jar:66fdef91e9739348df7a096aa384a5685f4e875584cce89386a7a47251c4d8e9',
-			'org.hamcrest:hamcrest-library:1.3:hamcrest-library-1.3.jar:711d64522f9ec410983bd310934296da134be4254a125080a0416ec178dfad1c',
-			'org.jmock:jmock-junit4:2.8.2:jmock-junit4-2.8.2.jar:f7ee4df4f7bd7b7f1cafad3b99eb74d579f109d5992ff625347352edb55e674c',
-			'org.jmock:jmock-legacy:2.8.2:jmock-legacy-2.8.2.jar:f2b985a5c08a9edb7f37612330c058809da3f6a6d63ce792426ebf8ff0d6d31b',
-			'org.jmock:jmock-testjar:2.8.2:jmock-testjar-2.8.2.jar:8900860f72c474e027cf97fe78dcbf154a1aa7fc62b6845c5fb4e4f3c7bc8760',
-			'org.jmock:jmock:2.8.2:jmock-2.8.2.jar:6c73cb4a2e6dbfb61fd99c9a768539c170ab6568e57846bd60dbf19596b65b16',
-			'org.objenesis:objenesis:2.1:objenesis-2.1.jar:c74330cc6b806c804fd37e74487b4fe5d7c2750c5e15fbc6efa13bdee1bdef80',
-			'org.ow2.asm:asm-all:5.2:asm-all-5.2.jar:7fbffbc1db3422e2101689fd88df8384b15817b52b9b2b267b9f6d2511dc198d',
-			'org.ow2.asm:asm:5.0.4:asm-5.0.4.jar:896618ed8ae62702521a78bc7be42b7c491a08e6920a15f89a3ecdec31e9a220',
-	]
-}
-
 // needed to make test output available to bramble-core and briar-core
 configurations {
 	testOutput.extendsFrom(testCompile)
@@ -55,3 +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/keyagreement/KeyAgreementConstants.java

@@ -7,16 +7,6 @@ public interface KeyAgreementConstants {
 	 */
 	byte PROTOCOL_VERSION = 4;
 
-	/**
-	 * The length of the record header in bytes.
-	 */
-	int RECORD_HEADER_LENGTH = 4;
-
-	/**
-	 * The offset of the payload length in the record header, in bytes.
-	 */
-	int RECORD_HEADER_PAYLOAD_LENGTH_OFFSET = 2;
-
 	/**
 	 * The length of the BQP key commitment in bytes.
 	 */

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

@@ -0,0 +1,11 @@
+package org.briarproject.bramble.api.system;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import java.io.InputStream;
+
+@NotNullByDefault
+public interface ResourceProvider {
+
+	InputStream getResourceInputStream(String name);
+}

bramble-api/witness.gradle

@@ -0,0 +1,24 @@
+dependencyVerification {
+    verify = [
+        'cglib:cglib:3.2.0:cglib-3.2.0.jar:adb13bab79712ad6bdf1bd59f2a3918018a8016e722e8a357065afb9e6690861',
+        'com.google.code.findbugs:jsr305:3.0.2:jsr305-3.0.2.jar:766ad2a0783f2687962c8ad74ceecc38a28b9f72a2d085ee438b7813e928d0c7',
+        'com.google.dagger:dagger:2.0.2:dagger-2.0.2.jar:84c0282ed8be73a29e0475d639da030b55dee72369e58dd35ae7d4fe6243dcf9',
+        'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
+        'junit:junit:4.12:junit-4.12.jar:59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a',
+        'org.apache.ant:ant-launcher:1.9.4:ant-launcher-1.9.4.jar:7bccea20b41801ca17bcbc909a78c835d0f443f12d639c77bd6ae3d05861608d',
+        'org.apache.ant:ant:1.9.4:ant-1.9.4.jar:649ae0730251de07b8913f49286d46bba7b92d47c5f332610aa426c4f02161d8',
+        'org.beanshell:bsh:1.3.0:bsh-1.3.0.jar:9b04edc75d19db54f1b4e8b5355e9364384c6cf71eb0a1b9724c159d779879f8',
+        'org.codehaus.mojo.signature:java16:1.1:java16-1.1.signature:53799223a2c98dba2d0add810bed76315460df285c69e4f397ae6098f87dd619',
+        'org.codehaus.mojo:animal-sniffer-ant-tasks:1.16:animal-sniffer-ant-tasks-1.16.jar:890040976fbe2d584619a6a61b1fd2e925b3b5eb342a85eb2762c467c0d64e90',
+        'org.codehaus.mojo:animal-sniffer:1.16:animal-sniffer-1.16.jar:72be8bcc226ba43b937c722a08a07852bfa1b11400089265d5df0ee7b38b1d52',
+        'org.hamcrest:hamcrest-core:1.3:hamcrest-core-1.3.jar:66fdef91e9739348df7a096aa384a5685f4e875584cce89386a7a47251c4d8e9',
+        'org.hamcrest:hamcrest-library:1.3:hamcrest-library-1.3.jar:711d64522f9ec410983bd310934296da134be4254a125080a0416ec178dfad1c',
+        'org.jmock:jmock-junit4:2.8.2:jmock-junit4-2.8.2.jar:f7ee4df4f7bd7b7f1cafad3b99eb74d579f109d5992ff625347352edb55e674c',
+        'org.jmock:jmock-legacy:2.8.2:jmock-legacy-2.8.2.jar:f2b985a5c08a9edb7f37612330c058809da3f6a6d63ce792426ebf8ff0d6d31b',
+        'org.jmock:jmock-testjar:2.8.2:jmock-testjar-2.8.2.jar:8900860f72c474e027cf97fe78dcbf154a1aa7fc62b6845c5fb4e4f3c7bc8760',
+        'org.jmock:jmock:2.8.2:jmock-2.8.2.jar:6c73cb4a2e6dbfb61fd99c9a768539c170ab6568e57846bd60dbf19596b65b16',
+        'org.objenesis:objenesis:2.1:objenesis-2.1.jar:c74330cc6b806c804fd37e74487b4fe5d7c2750c5e15fbc6efa13bdee1bdef80',
+        'org.ow2.asm:asm-all:5.2:asm-all-5.2.jar:7fbffbc1db3422e2101689fd88df8384b15817b52b9b2b267b9f6d2511dc198d',
+        'org.ow2.asm:asm:5.0.4:asm-5.0.4.jar:896618ed8ae62702521a78bc7be42b7c491a08e6920a15f89a3ecdec31e9a220',
+    ]
+}

bramble-core/build.gradle

@@ -6,6 +6,7 @@ apply plugin: 'ru.vyarus.animalsniffer'
 apply plugin: 'net.ltgt.apt'
 apply plugin: 'idea'
 apply plugin: 'witness'
+apply from: 'witness.gradle'
 
 dependencies {
 	implementation project(path: ':bramble-api', configuration: 'default')
@@ -14,6 +15,7 @@ dependencies {
 	implementation 'org.bitlet:weupnp:0.1.4'
 	implementation 'net.i2p.crypto:eddsa:0.2.0'
 	implementation 'org.whispersystems:curve25519-java:0.4.1'
+	implementation 'org.briarproject:jtorctl:0.3'
 
 	apt 'com.google.dagger:dagger-compiler:2.0.2'
 
@@ -31,39 +33,6 @@ dependencies {
 	signature 'org.codehaus.mojo.signature:java16:1.1@signature'
 }
 
-dependencyVerification {
-	verify = [
-			'cglib:cglib:3.2.0:cglib-3.2.0.jar:adb13bab79712ad6bdf1bd59f2a3918018a8016e722e8a357065afb9e6690861',
-			'com.google.dagger:dagger-compiler:2.0.2:dagger-compiler-2.0.2.jar:b74bc9de063dd4c6400b232231f2ef5056145b8fbecbf5382012007dd1c071b3',
-			'com.google.dagger:dagger-producers:2.0-beta:dagger-producers-2.0-beta.jar:99ec15e8a0507ba569e7655bc1165ee5e5ca5aa914b3c8f7e2c2458f724edd6b',
-			'com.google.dagger:dagger:2.0.2:dagger-2.0.2.jar:84c0282ed8be73a29e0475d639da030b55dee72369e58dd35ae7d4fe6243dcf9',
-			'com.google.guava:guava:18.0:guava-18.0.jar:d664fbfc03d2e5ce9cab2a44fb01f1d0bf9dfebeccc1a473b1f9ea31f79f6f99',
-			'com.h2database:h2:1.4.192:h2-1.4.192.jar:225b22e9857235c46c93861410b60b8c81c10dc8985f4faf188985ba5445126c',
-			'com.madgag.spongycastle:core:1.58.0.0:core-1.58.0.0.jar:199617dd5698c5a9312b898c0a4cec7ce9dd8649d07f65d91629f58229d72728',
-			'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
-			'junit:junit:4.12:junit-4.12.jar:59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a',
-			'net.i2p.crypto:eddsa:0.2.0:eddsa-0.2.0.jar:a7cb1b85c16e2f0730b9204106929a1d9aaae1df728adc7041a8b8b605692140',
-			'org.apache.ant:ant-launcher:1.9.4:ant-launcher-1.9.4.jar:7bccea20b41801ca17bcbc909a78c835d0f443f12d639c77bd6ae3d05861608d',
-			'org.apache.ant:ant:1.9.4:ant-1.9.4.jar:649ae0730251de07b8913f49286d46bba7b92d47c5f332610aa426c4f02161d8',
-			'org.beanshell:bsh:1.3.0:bsh-1.3.0.jar:9b04edc75d19db54f1b4e8b5355e9364384c6cf71eb0a1b9724c159d779879f8',
-			'org.bitlet:weupnp:0.1.4:weupnp-0.1.4.jar:88df7e6504929d00bdb832863761385c68ab92af945b04f0770b126270a444fb',
-			'org.codehaus.mojo.signature:java16:1.1:java16-1.1.signature:53799223a2c98dba2d0add810bed76315460df285c69e4f397ae6098f87dd619',
-			'org.codehaus.mojo:animal-sniffer-ant-tasks:1.16:animal-sniffer-ant-tasks-1.16.jar:890040976fbe2d584619a6a61b1fd2e925b3b5eb342a85eb2762c467c0d64e90',
-			'org.codehaus.mojo:animal-sniffer:1.16:animal-sniffer-1.16.jar:72be8bcc226ba43b937c722a08a07852bfa1b11400089265d5df0ee7b38b1d52',
-			'org.hamcrest:hamcrest-core:1.3:hamcrest-core-1.3.jar:66fdef91e9739348df7a096aa384a5685f4e875584cce89386a7a47251c4d8e9',
-			'org.hamcrest:hamcrest-library:1.3:hamcrest-library-1.3.jar:711d64522f9ec410983bd310934296da134be4254a125080a0416ec178dfad1c',
-			'org.hsqldb:hsqldb:2.3.5:hsqldb-2.3.5.jar:6676a6977ac98997a80f827ddbd3fe8ca1e0853dad1492512135fd1a222ccfad',
-			'org.jmock:jmock-junit4:2.8.2:jmock-junit4-2.8.2.jar:f7ee4df4f7bd7b7f1cafad3b99eb74d579f109d5992ff625347352edb55e674c',
-			'org.jmock:jmock-legacy:2.8.2:jmock-legacy-2.8.2.jar:f2b985a5c08a9edb7f37612330c058809da3f6a6d63ce792426ebf8ff0d6d31b',
-			'org.jmock:jmock-testjar:2.8.2:jmock-testjar-2.8.2.jar:8900860f72c474e027cf97fe78dcbf154a1aa7fc62b6845c5fb4e4f3c7bc8760',
-			'org.jmock:jmock:2.8.2:jmock-2.8.2.jar:6c73cb4a2e6dbfb61fd99c9a768539c170ab6568e57846bd60dbf19596b65b16',
-			'org.objenesis:objenesis:2.1:objenesis-2.1.jar:c74330cc6b806c804fd37e74487b4fe5d7c2750c5e15fbc6efa13bdee1bdef80',
-			'org.ow2.asm:asm-all:5.2:asm-all-5.2.jar:7fbffbc1db3422e2101689fd88df8384b15817b52b9b2b267b9f6d2511dc198d',
-			'org.ow2.asm:asm:5.0.4:asm-5.0.4.jar:896618ed8ae62702521a78bc7be42b7c491a08e6920a15f89a3ecdec31e9a220',
-			'org.whispersystems:curve25519-java:0.4.1:curve25519-java-0.4.1.jar:7dd659d8822c06c3aea1a47f18fac9e5761e29cab8100030b877db445005f03e',
-	]
-}
-
 // needed to make test output available to bramble-j2se
 configurations {
 	testOutput.extendsFrom(testCompile)
@@ -75,3 +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/plugin/tor/CircumventionModule.java

@@ -0,0 +1,17 @@
+package org.briarproject.bramble.plugin.tor;
+
+import javax.inject.Singleton;
+
+import dagger.Module;
+import dagger.Provides;
+
+@Module
+public class CircumventionModule {
+
+	@Provides
+	@Singleton
+	CircumventionProvider provideCircumventionProvider(
+			CircumventionProviderImpl provider) {
+		return provider;
+	}
+}

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

@@ -1,13 +1,10 @@
 package org.briarproject.bramble.plugin.tor;
 
-import android.content.Context;
-import android.content.res.Resources;
-
 import org.briarproject.bramble.api.lifecycle.IoExecutor;
+import org.briarproject.bramble.api.system.ResourceProvider;
 
 import java.io.InputStream;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Scanner;
@@ -16,26 +13,27 @@ import java.util.Set;
 import javax.annotation.Nullable;
 import javax.inject.Inject;
 
-// TODO: Create a module for this so it doesn't need to be public
+import static java.util.Arrays.asList;
 
-public class CircumventionProviderImpl implements CircumventionProvider {
+class CircumventionProviderImpl implements CircumventionProvider {
 
 	private final static String BRIDGE_FILE_NAME = "bridges";
 
-	private final Context ctx;
+	private static final Set<String> BLOCKED_IN_COUNTRIES =
+			new HashSet<>(asList(BLOCKED));
+	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
-	public CircumventionProviderImpl(Context ctx) {
+	CircumventionProviderImpl(ResourceProvider resourceProvider) {
-		this.ctx = ctx;
+		this.resourceProvider = resourceProvider;
 	}
 
-	private static final Set<String> BLOCKED_IN_COUNTRIES =
-			new HashSet<>(Arrays.asList(BLOCKED));
-	private static final Set<String> BRIDGES_WORK_IN_COUNTRIES =
-			new HashSet<>(Arrays.asList(BRIDGES));
-
 	@Override
 	public boolean isTorProbablyBlocked(String countryCode) {
 		return BLOCKED_IN_COUNTRIES.contains(countryCode);
@@ -49,15 +47,14 @@ public class CircumventionProviderImpl implements CircumventionProvider {
 	@Override
 	@IoExecutor
 	public List<String> getBridges() {
-		if (this.bridges != null) return this.bridges;
+		List<String> bridges = this.bridges;
+		if (bridges != null) return new ArrayList<>(bridges);
 
-		Resources res = ctx.getResources();
+		InputStream is =
-		int resId = res.getIdentifier(BRIDGE_FILE_NAME, "raw",
+				resourceProvider.getResourceInputStream(BRIDGE_FILE_NAME);
-				ctx.getPackageName());
-		InputStream is = ctx.getResources().openRawResource(resId);
 		Scanner scanner = new Scanner(is);
 
-		List<String> bridges = new ArrayList<>();
+		bridges = new ArrayList<>();
 		while (scanner.hasNextLine()) {
 			String line = scanner.nextLine();
 			if (!line.startsWith("#")) bridges.add(line);

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

@@ -1,12 +1,5 @@
 package org.briarproject.bramble.plugin.tor;
 
-import android.content.Context;
-import android.content.pm.PackageInfo;
-import android.content.pm.PackageManager;
-import android.content.pm.PackageManager.NameNotFoundException;
-import android.content.res.Resources;
-import android.os.PowerManager;
-
 import net.freehaven.tor.control.EventHandler;
 import net.freehaven.tor.control.TorControlConnection;
 
@@ -33,8 +26,8 @@ import org.briarproject.bramble.api.settings.Settings;
 import org.briarproject.bramble.api.settings.event.SettingsUpdatedEvent;
 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.util.IoUtils;
-import org.briarproject.bramble.util.RenewableWakeLock;
 import org.briarproject.bramble.util.StringUtils;
 
 import java.io.Closeable;
@@ -57,7 +50,6 @@ import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Scanner;
 import java.util.concurrent.Executor;
-import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.logging.Logger;
 import java.util.regex.Pattern;
@@ -66,10 +58,6 @@ import java.util.zip.ZipInputStream;
 import javax.annotation.Nullable;
 import javax.net.SocketFactory;
 
-import static android.content.Context.MODE_PRIVATE;
-import static android.content.Context.POWER_SERVICE;
-import static android.os.PowerManager.PARTIAL_WAKE_LOCK;
-import static java.util.concurrent.TimeUnit.MINUTES;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static net.freehaven.tor.control.TorControlCommands.HS_ADDRESS;
@@ -88,7 +76,10 @@ import static org.briarproject.bramble.util.PrivacyUtils.scrubOnion;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
-class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
+abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
+
+	private static final Logger LOG =
+			Logger.getLogger(TorPlugin.class.getName());
 
 	private static final String[] EVENTS = {
 			"CIRC", "ORCONN", "HS_DESC", "NOTICE", "WARN", "ERR"
@@ -97,13 +88,8 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private static final int COOKIE_TIMEOUT_MS = 3000;
 	private static final int COOKIE_POLLING_INTERVAL_MS = 200;
 	private static final Pattern ONION = Pattern.compile("[a-z2-7]{16}");
-	// This tag may prevent Huawei's power manager from killing us
-	private static final String WAKE_LOCK_TAG = "LocationManagerService";
-	private static final Logger LOG =
-			Logger.getLogger(TorPlugin.class.getName());
 
 	private final Executor ioExecutor, connectionStatusExecutor;
-	private final Context appContext;
 	private final NetworkManager networkManager;
 	private final LocationUtils locationUtils;
 	private final SocketFactory torSocketFactory;
@@ -112,53 +98,54 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private final DuplexPluginCallback callback;
 	private final String architecture;
 	private final CircumventionProvider circumventionProvider;
+	private final ResourceProvider resourceProvider;
 	private final int maxLatency, maxIdleTime, socketTimeout;
-	private final ConnectionStatus connectionStatus;
 	private final File torDirectory, torFile, geoIpFile, configFile;
 	private final File doneFile, cookieFile;
-	private final RenewableWakeLock wakeLock;
+	private final ConnectionStatus connectionStatus;
 	private final AtomicBoolean used = new AtomicBoolean(false);
 
-	private volatile boolean running = false;
 	private volatile ServerSocket socket = null;
 	private volatile Socket controlSocket = null;
 	private volatile TorControlConnection controlConnection = null;
 
-	TorPlugin(Executor ioExecutor, ScheduledExecutorService scheduler,
+	protected volatile boolean running = false;
-			Context appContext, NetworkManager networkManager,
+
+	protected abstract int getProcessId();
+
+	protected abstract long getLastUpdateTime();
+
+	TorPlugin(Executor ioExecutor, NetworkManager networkManager,
 			LocationUtils locationUtils, SocketFactory torSocketFactory,
-			Clock clock, CircumventionProvider circumventionProvider,
+			Clock clock, ResourceProvider resourceProvider,
-			Backoff backoff, DuplexPluginCallback callback,
+			CircumventionProvider circumventionProvider, Backoff backoff,
-			String architecture, int maxLatency, int maxIdleTime) {
+			DuplexPluginCallback callback, String architecture, int maxLatency,
+			int maxIdleTime, File torDirectory) {
 		this.ioExecutor = ioExecutor;
-		this.appContext = appContext;
 		this.networkManager = networkManager;
 		this.locationUtils = locationUtils;
 		this.torSocketFactory = torSocketFactory;
 		this.clock = clock;
+		this.resourceProvider = resourceProvider;
+		this.circumventionProvider = circumventionProvider;
 		this.backoff = backoff;
 		this.callback = callback;
 		this.architecture = architecture;
-		this.circumventionProvider = circumventionProvider;
 		this.maxLatency = maxLatency;
 		this.maxIdleTime = maxIdleTime;
 		if (maxIdleTime > Integer.MAX_VALUE / 2)
 			socketTimeout = Integer.MAX_VALUE;
 		else socketTimeout = maxIdleTime * 2;
-		connectionStatus = new ConnectionStatus();
+		this.torDirectory = torDirectory;
-		torDirectory = appContext.getDir("tor", MODE_PRIVATE);
 		torFile = new File(torDirectory, "tor");
 		geoIpFile = new File(torDirectory, "geoip");
 		configFile = new File(torDirectory, "torrc");
 		doneFile = new File(torDirectory, "done");
 		cookieFile = new File(torDirectory, ".tor/control_auth_cookie");
+		connectionStatus = new ConnectionStatus();
 		// Don't execute more than one connection status check at a time
 		connectionStatusExecutor =
 				new PoliteExecutor("TorPlugin", ioExecutor, 1);
-		PowerManager pm = (PowerManager)
-				appContext.getSystemService(POWER_SERVICE);
-		wakeLock = new RenewableWakeLock(pm, scheduler, PARTIAL_WAKE_LOCK,
-				WAKE_LOCK_TAG, 1, MINUTES);
 	}
 
 	@Override
@@ -187,7 +174,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		LOG.info("Starting Tor");
 		String torPath = torFile.getAbsolutePath();
 		String configPath = configFile.getAbsolutePath();
-		String pid = String.valueOf(android.os.Process.myPid());
+		String pid = String.valueOf(getProcessId());
 		Process torProcess;
 		ProcessBuilder pb =
 				new ProcessBuilder(torPath, "-f", configPath, OWNER, pid);
@@ -266,13 +253,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	}
 
 	private boolean assetsAreUpToDate() {
-		try {
+		return doneFile.lastModified() > getLastUpdateTime();
-			PackageManager pm = appContext.getPackageManager();
-			PackageInfo pi = pm.getPackageInfo(appContext.getPackageName(), 0);
-			return doneFile.lastModified() > pi.lastUpdateTime;
-		} catch (NameNotFoundException e) {
-			throw new RuntimeException(e);
-		}
 	}
 
 	private void installAssets() throws PluginException {
@@ -305,29 +286,22 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private InputStream getTorInputStream() throws IOException {
 		if (LOG.isLoggable(INFO))
 			LOG.info("Installing Tor binary for " + architecture);
-		int resId = getResourceId("tor_" + architecture);
+		InputStream in =
-		InputStream in = appContext.getResources().openRawResource(resId);
+				resourceProvider.getResourceInputStream("tor_" + architecture);
 		ZipInputStream zin = new ZipInputStream(in);
 		if (zin.getNextEntry() == null) throw new IOException();
 		return zin;
 	}
 
 	private InputStream getGeoIpInputStream() throws IOException {
-		int resId = getResourceId("geoip");
+		InputStream in = resourceProvider.getResourceInputStream("geoip");
-		InputStream in = appContext.getResources().openRawResource(resId);
 		ZipInputStream zin = new ZipInputStream(in);
 		if (zin.getNextEntry() == null) throw new IOException();
 		return zin;
 	}
 
 	private InputStream getConfigInputStream() {
-		int resId = getResourceId("torrc");
+		return resourceProvider.getResourceInputStream("torrc");
-		return appContext.getResources().openRawResource(resId);
-	}
-
-	private int getResourceId(String filename) {
-		Resources res = appContext.getResources();
-		return res.getIdentifier(filename, "raw", appContext.getPackageName());
 	}
 
 	private void tryToClose(@Nullable Closeable c) {
@@ -473,15 +447,11 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		}
 	}
 
-	private void enableNetwork(boolean enable) throws IOException {
+	protected void enableNetwork(boolean enable) throws IOException {
 		if (!running) return;
-		if (enable) wakeLock.acquire();
 		connectionStatus.enableNetwork(enable);
 		controlConnection.setConf("DisableNetwork", enable ? "0" : "1");
-		if (!enable) {
+		if (!enable) callback.transportDisabled();
-			callback.transportDisabled();
-			wakeLock.release();
-		}
 	}
 
 	private void enableBridges(boolean enable) throws IOException {
@@ -509,7 +479,6 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				logException(LOG, WARNING, e);
 			}
 		}
-		wakeLock.release();
 	}
 
 	@Override

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

@@ -46,7 +46,7 @@ class SyncRecordReaderImpl implements SyncRecordReader {
 	}
 
 	private void readRecord() throws IOException {
-		assert nextRecord == null;
+		if (nextRecord != null) throw new AssertionError();
 		while (true) {
 			nextRecord = reader.readRecord();
 			// Check the protocol version
@@ -62,7 +62,7 @@ class SyncRecordReaderImpl implements SyncRecordReader {
 	}
 
 	private byte getNextRecordType() {
-		assert nextRecord != null;
+		if (nextRecord == null) throw new AssertionError();
 		return nextRecord.getRecordType();
 	}
 
@@ -100,7 +100,7 @@ class SyncRecordReaderImpl implements SyncRecordReader {
 	}
 
 	private List<MessageId> readMessageIds() throws IOException {
-		assert nextRecord != null;
+		if (nextRecord == null) throw new AssertionError();
 		byte[] payload = nextRecord.getPayload();
 		if (payload.length == 0) throw new FormatException();
 		if (payload.length % UniqueId.LENGTH != 0) throw new FormatException();
@@ -122,7 +122,7 @@ class SyncRecordReaderImpl implements SyncRecordReader {
 	@Override
 	public Message readMessage() throws IOException {
 		if (!hasMessage()) throw new FormatException();
-		assert nextRecord != null;
+		if (nextRecord == null) throw new AssertionError();
 		byte[] payload = nextRecord.getPayload();
 		if (payload.length < MESSAGE_HEADER_LENGTH) throw new FormatException();
 		// Validate timestamp

bramble-core/witness.gradle

@@ -0,0 +1,33 @@
+dependencyVerification {
+    verify = [
+        'cglib:cglib:3.2.0:cglib-3.2.0.jar:adb13bab79712ad6bdf1bd59f2a3918018a8016e722e8a357065afb9e6690861',
+        'com.google.dagger:dagger-compiler:2.0.2:dagger-compiler-2.0.2.jar:b74bc9de063dd4c6400b232231f2ef5056145b8fbecbf5382012007dd1c071b3',
+        'com.google.dagger:dagger-producers:2.0-beta:dagger-producers-2.0-beta.jar:99ec15e8a0507ba569e7655bc1165ee5e5ca5aa914b3c8f7e2c2458f724edd6b',
+        'com.google.dagger:dagger:2.0.2:dagger-2.0.2.jar:84c0282ed8be73a29e0475d639da030b55dee72369e58dd35ae7d4fe6243dcf9',
+        'com.google.guava:guava:18.0:guava-18.0.jar:d664fbfc03d2e5ce9cab2a44fb01f1d0bf9dfebeccc1a473b1f9ea31f79f6f99',
+        'com.h2database:h2:1.4.192:h2-1.4.192.jar:225b22e9857235c46c93861410b60b8c81c10dc8985f4faf188985ba5445126c',
+        'com.madgag.spongycastle:core:1.58.0.0:core-1.58.0.0.jar:199617dd5698c5a9312b898c0a4cec7ce9dd8649d07f65d91629f58229d72728',
+        'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
+        'junit:junit:4.12:junit-4.12.jar:59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a',
+        'net.i2p.crypto:eddsa:0.2.0:eddsa-0.2.0.jar:a7cb1b85c16e2f0730b9204106929a1d9aaae1df728adc7041a8b8b605692140',
+        'org.apache.ant:ant-launcher:1.9.4:ant-launcher-1.9.4.jar:7bccea20b41801ca17bcbc909a78c835d0f443f12d639c77bd6ae3d05861608d',
+        'org.apache.ant:ant:1.9.4:ant-1.9.4.jar:649ae0730251de07b8913f49286d46bba7b92d47c5f332610aa426c4f02161d8',
+        'org.beanshell:bsh:1.3.0:bsh-1.3.0.jar:9b04edc75d19db54f1b4e8b5355e9364384c6cf71eb0a1b9724c159d779879f8',
+        'org.bitlet:weupnp:0.1.4:weupnp-0.1.4.jar:88df7e6504929d00bdb832863761385c68ab92af945b04f0770b126270a444fb',
+        'org.briarproject:jtorctl:0.3:jtorctl-0.3.jar:f2939238a097898998432effe93b0334d97a787972ab3a91a8973a1d309fc864',
+        'org.codehaus.mojo.signature:java16:1.1:java16-1.1.signature:53799223a2c98dba2d0add810bed76315460df285c69e4f397ae6098f87dd619',
+        'org.codehaus.mojo:animal-sniffer-ant-tasks:1.16:animal-sniffer-ant-tasks-1.16.jar:890040976fbe2d584619a6a61b1fd2e925b3b5eb342a85eb2762c467c0d64e90',
+        'org.codehaus.mojo:animal-sniffer:1.16:animal-sniffer-1.16.jar:72be8bcc226ba43b937c722a08a07852bfa1b11400089265d5df0ee7b38b1d52',
+        'org.hamcrest:hamcrest-core:1.3:hamcrest-core-1.3.jar:66fdef91e9739348df7a096aa384a5685f4e875584cce89386a7a47251c4d8e9',
+        'org.hamcrest:hamcrest-library:1.3:hamcrest-library-1.3.jar:711d64522f9ec410983bd310934296da134be4254a125080a0416ec178dfad1c',
+        'org.hsqldb:hsqldb:2.3.5:hsqldb-2.3.5.jar:6676a6977ac98997a80f827ddbd3fe8ca1e0853dad1492512135fd1a222ccfad',
+        'org.jmock:jmock-junit4:2.8.2:jmock-junit4-2.8.2.jar:f7ee4df4f7bd7b7f1cafad3b99eb74d579f109d5992ff625347352edb55e674c',
+        'org.jmock:jmock-legacy:2.8.2:jmock-legacy-2.8.2.jar:f2b985a5c08a9edb7f37612330c058809da3f6a6d63ce792426ebf8ff0d6d31b',
+        'org.jmock:jmock-testjar:2.8.2:jmock-testjar-2.8.2.jar:8900860f72c474e027cf97fe78dcbf154a1aa7fc62b6845c5fb4e4f3c7bc8760',
+        'org.jmock:jmock:2.8.2:jmock-2.8.2.jar:6c73cb4a2e6dbfb61fd99c9a768539c170ab6568e57846bd60dbf19596b65b16',
+        'org.objenesis:objenesis:2.1:objenesis-2.1.jar:c74330cc6b806c804fd37e74487b4fe5d7c2750c5e15fbc6efa13bdee1bdef80',
+        'org.ow2.asm:asm-all:5.2:asm-all-5.2.jar:7fbffbc1db3422e2101689fd88df8384b15817b52b9b2b267b9f6d2511dc198d',
+        'org.ow2.asm:asm:5.0.4:asm-5.0.4.jar:896618ed8ae62702521a78bc7be42b7c491a08e6920a15f89a3ecdec31e9a220',
+        'org.whispersystems:curve25519-java:0.4.1:curve25519-java-0.4.1.jar:7dd659d8822c06c3aea1a47f18fac9e5761e29cab8100030b877db445005f03e',
+    ]
+}

bramble-j2se/build.gradle

@@ -5,6 +5,7 @@ targetCompatibility = 1.8
 apply plugin: 'net.ltgt.apt'
 apply plugin: 'idea'
 apply plugin: 'witness'
+apply from: 'witness.gradle'
 
 dependencies {
 	implementation project(path: ':bramble-core', configuration: 'default')
@@ -24,31 +25,8 @@ dependencies {
 	testImplementation "org.hamcrest:hamcrest-core:1.3"
 }
 
-dependencyVerification {
-	verify = [
-			'cglib:cglib:3.2.0:cglib-3.2.0.jar:adb13bab79712ad6bdf1bd59f2a3918018a8016e722e8a357065afb9e6690861',
-			'com.google.dagger:dagger-compiler:2.0.2:dagger-compiler-2.0.2.jar:b74bc9de063dd4c6400b232231f2ef5056145b8fbecbf5382012007dd1c071b3',
-			'com.google.dagger:dagger-producers:2.0-beta:dagger-producers-2.0-beta.jar:99ec15e8a0507ba569e7655bc1165ee5e5ca5aa914b3c8f7e2c2458f724edd6b',
-			'com.google.dagger:dagger:2.0.2:dagger-2.0.2.jar:84c0282ed8be73a29e0475d639da030b55dee72369e58dd35ae7d4fe6243dcf9',
-			'com.google.guava:guava:18.0:guava-18.0.jar:d664fbfc03d2e5ce9cab2a44fb01f1d0bf9dfebeccc1a473b1f9ea31f79f6f99',
-			'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
-			'junit:junit:4.12:junit-4.12.jar:59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a',
-			'net.java.dev.jna:jna-platform:4.4.0:jna-platform-4.4.0.jar:e9dda9e884fc107eb6367710540789a12dfa8ad28be9326b22ca6e352e325499',
-			'net.java.dev.jna:jna:4.4.0:jna-4.4.0.jar:c4dadeeecaa90c8847902082aee5eb107fcf59c5d0e63a17fcaf273c0e2d2bd1',
-			'org.apache.ant:ant-launcher:1.9.4:ant-launcher-1.9.4.jar:7bccea20b41801ca17bcbc909a78c835d0f443f12d639c77bd6ae3d05861608d',
-			'org.apache.ant:ant:1.9.4:ant-1.9.4.jar:649ae0730251de07b8913f49286d46bba7b92d47c5f332610aa426c4f02161d8',
-			'org.beanshell:bsh:1.3.0:bsh-1.3.0.jar:9b04edc75d19db54f1b4e8b5355e9364384c6cf71eb0a1b9724c159d779879f8',
-			'org.hamcrest:hamcrest-core:1.3:hamcrest-core-1.3.jar:66fdef91e9739348df7a096aa384a5685f4e875584cce89386a7a47251c4d8e9',
-			'org.hamcrest:hamcrest-library:1.3:hamcrest-library-1.3.jar:711d64522f9ec410983bd310934296da134be4254a125080a0416ec178dfad1c',
-			'org.jmock:jmock-junit4:2.8.2:jmock-junit4-2.8.2.jar:f7ee4df4f7bd7b7f1cafad3b99eb74d579f109d5992ff625347352edb55e674c',
-			'org.jmock:jmock-legacy:2.8.2:jmock-legacy-2.8.2.jar:f2b985a5c08a9edb7f37612330c058809da3f6a6d63ce792426ebf8ff0d6d31b',
-			'org.jmock:jmock-testjar:2.8.2:jmock-testjar-2.8.2.jar:8900860f72c474e027cf97fe78dcbf154a1aa7fc62b6845c5fb4e4f3c7bc8760',
-			'org.jmock:jmock:2.8.2:jmock-2.8.2.jar:6c73cb4a2e6dbfb61fd99c9a768539c170ab6568e57846bd60dbf19596b65b16',
-			'org.objenesis:objenesis:2.1:objenesis-2.1.jar:c74330cc6b806c804fd37e74487b4fe5d7c2750c5e15fbc6efa13bdee1bdef80',
-			'org.ow2.asm:asm:5.0.4:asm-5.0.4.jar:896618ed8ae62702521a78bc7be42b7c491a08e6920a15f89a3ecdec31e9a220',
-	]
-}
-
 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'
 }

bramble-j2se/witness.gradle

@@ -0,0 +1,24 @@
+dependencyVerification {
+    verify = [
+        'cglib:cglib:3.2.0:cglib-3.2.0.jar:adb13bab79712ad6bdf1bd59f2a3918018a8016e722e8a357065afb9e6690861',
+        'com.google.dagger:dagger-compiler:2.0.2:dagger-compiler-2.0.2.jar:b74bc9de063dd4c6400b232231f2ef5056145b8fbecbf5382012007dd1c071b3',
+        'com.google.dagger:dagger-producers:2.0-beta:dagger-producers-2.0-beta.jar:99ec15e8a0507ba569e7655bc1165ee5e5ca5aa914b3c8f7e2c2458f724edd6b',
+        'com.google.dagger:dagger:2.0.2:dagger-2.0.2.jar:84c0282ed8be73a29e0475d639da030b55dee72369e58dd35ae7d4fe6243dcf9',
+        'com.google.guava:guava:18.0:guava-18.0.jar:d664fbfc03d2e5ce9cab2a44fb01f1d0bf9dfebeccc1a473b1f9ea31f79f6f99',
+        'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
+        'junit:junit:4.12:junit-4.12.jar:59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a',
+        'net.java.dev.jna:jna-platform:4.4.0:jna-platform-4.4.0.jar:e9dda9e884fc107eb6367710540789a12dfa8ad28be9326b22ca6e352e325499',
+        'net.java.dev.jna:jna:4.4.0:jna-4.4.0.jar:c4dadeeecaa90c8847902082aee5eb107fcf59c5d0e63a17fcaf273c0e2d2bd1',
+        'org.apache.ant:ant-launcher:1.9.4:ant-launcher-1.9.4.jar:7bccea20b41801ca17bcbc909a78c835d0f443f12d639c77bd6ae3d05861608d',
+        'org.apache.ant:ant:1.9.4:ant-1.9.4.jar:649ae0730251de07b8913f49286d46bba7b92d47c5f332610aa426c4f02161d8',
+        'org.beanshell:bsh:1.3.0:bsh-1.3.0.jar:9b04edc75d19db54f1b4e8b5355e9364384c6cf71eb0a1b9724c159d779879f8',
+        'org.hamcrest:hamcrest-core:1.3:hamcrest-core-1.3.jar:66fdef91e9739348df7a096aa384a5685f4e875584cce89386a7a47251c4d8e9',
+        'org.hamcrest:hamcrest-library:1.3:hamcrest-library-1.3.jar:711d64522f9ec410983bd310934296da134be4254a125080a0416ec178dfad1c',
+        'org.jmock:jmock-junit4:2.8.2:jmock-junit4-2.8.2.jar:f7ee4df4f7bd7b7f1cafad3b99eb74d579f109d5992ff625347352edb55e674c',
+        'org.jmock:jmock-legacy:2.8.2:jmock-legacy-2.8.2.jar:f2b985a5c08a9edb7f37612330c058809da3f6a6d63ce792426ebf8ff0d6d31b',
+        'org.jmock:jmock-testjar:2.8.2:jmock-testjar-2.8.2.jar:8900860f72c474e027cf97fe78dcbf154a1aa7fc62b6845c5fb4e4f3c7bc8760',
+        'org.jmock:jmock:2.8.2:jmock-2.8.2.jar:6c73cb4a2e6dbfb61fd99c9a768539c170ab6568e57846bd60dbf19596b65b16',
+        'org.objenesis:objenesis:2.1:objenesis-2.1.jar:c74330cc6b806c804fd37e74487b4fe5d7c2750c5e15fbc6efa13bdee1bdef80',
+        'org.ow2.asm:asm:5.0.4:asm-5.0.4.jar:896618ed8ae62702521a78bc7be42b7c491a08e6920a15f89a3ecdec31e9a220',
+    ]
+}

briar-android/build.gradle

@@ -1,5 +1,6 @@
 apply plugin: 'com.android.application'
 apply plugin: 'witness'
+apply from: 'witness.gradle'
 
 dependencies {
 	implementation project(path: ':briar-core', configuration: 'default')
@@ -40,9 +41,9 @@ dependencies {
 
 	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
 	testImplementation project(path: ':bramble-core', configuration: 'testOutput')
-	testImplementation 'org.robolectric:robolectric:3.5.1'
+	testImplementation 'org.robolectric:robolectric:3.8'
-	testImplementation 'org.robolectric:shadows-support-v4:3.0'
+	testImplementation 'org.robolectric:shadows-support-v4:3.3.2'
-	testImplementation 'org.mockito:mockito-core:2.8.9'
+	testImplementation 'org.mockito:mockito-core:2.13.0'
 	testImplementation 'junit:junit:4.12'
 	testImplementation "org.jmock:jmock:2.8.2"
 	testImplementation "org.jmock:jmock-junit4:2.8.2"
@@ -61,186 +62,6 @@ dependencies {
 	androidTestImplementation 'junit:junit:4.12'
 }
 
-dependencyVerification {
-	verify = [
-			'android.arch.core:common:1.1.0:common-1.1.0.jar:d34824b794bc92ff8f647a9bb13a7c73de920de5b47075b5d2c4f0770e9b8bfd',
-			'android.arch.core:runtime:1.1.0:runtime-1.1.0.aar:83400f7575bcfb8a2eeec64e05590f037bfaed1e56aa3a4214d20e55878445e3',
-			'android.arch.lifecycle:common:1.1.0:common-1.1.0.jar:614e31cfd33255dc4d5f5d8e62cfa6be2fbbc2a35643a79dc3ed008004c30807',
-			'android.arch.lifecycle:livedata-core:1.1.0:livedata-core-1.1.0.aar:14e57ff8ffb65a80c7e72d91f2076acccdaf2970f234c6261e03a6127eb5206b',
-			'android.arch.lifecycle:runtime:1.1.0:runtime-1.1.0.aar:094fd793924dd6a5136753e599ac8174a8147f4a401386b694ba7d818c223e2e',
-			'android.arch.lifecycle:viewmodel:1.1.0:viewmodel-1.1.0.aar:6407c93a5ea9850661dca42a0068d6f3deccefd7228ee69bae1c35d70cbc2557',
-			'backport-util-concurrent:backport-util-concurrent:3.1:backport-util-concurrent-3.1.jar:f5759b7fcdfc83a525a036deedcbd32e5b536b625ebc282426f16ca137eb5902',
-			'cglib:cglib:3.2.0:cglib-3.2.0.jar:adb13bab79712ad6bdf1bd59f2a3918018a8016e722e8a357065afb9e6690861',
-			'ch.acra:acra:4.9.1:acra-4.9.1.aar:d2762968c448757a7d6acc9f141881d9632f664988e9723ece33b5f7c79f3bc9',
-			'classworlds:classworlds:1.1-alpha-2:classworlds-1.1-alpha-2.jar:2bf4e59f3acd106fea6145a9a88fe8956509f8b9c0fdd11eb96fee757269e3f3',
-			'com.almworks.sqlite4java:sqlite4java:0.282:sqlite4java-0.282.jar:9e1d8dd83ca6003f841e3af878ce2dc7c22497493a7bb6d1b62ec1b0d0a83c05',
-			'com.android.support.constraint:constraint-layout-solver:1.1.0:constraint-layout-solver-1.1.0.jar:fcb4c7d705754ca3d69b1b2c3caf445a425599fda8caabbcf855d98ea0663e4e',
-			'com.android.support.constraint:constraint-layout:1.1.0:constraint-layout-1.1.0.aar:d490188709b7bb2f11609beadd7e5eb7538892f308828ec3ff261a74e6ecf47e',
-			'com.android.support.test.espresso:espresso-contrib:3.0.2:espresso-contrib-3.0.2.aar:eacb4a10dde5597b8a6b8668804d4b63e3ae2d46a78192068532922fec0b4a66',
-			'com.android.support.test.espresso:espresso-core:3.0.2:espresso-core-3.0.2.aar:f40bf62e26e6f95a9c376c4e318415a77053b7dbb7ec12688eb6fab93dffdf73',
-			'com.android.support.test.espresso:espresso-idling-resource:3.0.2:espresso-idling-resource-3.0.2.aar:c6485150f9f4aea1ce9d138f3d60d82ebed3fe35b340a8b1dc975ff01f3b17b2',
-			'com.android.support.test.espresso:espresso-intents:3.0.2:espresso-intents-3.0.2.aar:556f99e8c8723a9ef313ed816fb9074d65903c6767521a66b099720d2cc21f10',
-			'com.android.support.test.uiautomator:uiautomator-v18:2.1.3:uiautomator-v18-2.1.3.aar:15e6b3c7104859630bf844e31805aa7cb2eb4b385e6119ab34132c8258eee2c4',
-			'com.android.support.test:monitor:1.0.2:monitor-1.0.2.aar:38ef4fa98a32dc55550ff49bb36a583e178b3a9b830fcb8dcc27bfc4254bc2bc',
-			'com.android.support.test:rules:1.0.2:rules-1.0.2.aar:7ddad387d1a16d4dbdbefacee070d34574e565b008117c1a163edac8ae02a6aa',
-			'com.android.support.test:runner:1.0.2:runner-1.0.2.aar:f04b9ae342975ba1cb3e4a06e13426e3e6b8a73faa45acba604493d83c9a4f00',
-			'com.android.support:animated-vector-drawable:27.1.1:animated-vector-drawable-27.1.1.aar:59670473f6e98fda792f7bef25dd7292b0a3106031c7a5e30eb020bf26f077bd',
-			'com.android.support:appcompat-v7:27.1.1:appcompat-v7-27.1.1.aar:0c7808fbbc5838d831e32e3c0a6f84e1f2c981deb8f11e010650f2b57923a335',
-			'com.android.support:cardview-v7:27.1.1:cardview-v7-27.1.1.aar:8ed955dd037d82a7b4bbcaedb4f896523c3e4c1bf3ca698ce807c350767a2886',
-			'com.android.support:design:27.1.1:design-27.1.1.aar:7225973f7ee03765008a9c2f17a40b154c6885169fef022276e811c926a2202c',
-			'com.android.support:preference-v14:27.1.1:preference-v14-27.1.1.aar:dc058932e6fd93bf57d23fcc2f22351c21e5125e513721e4b0b03374341ad400',
-			'com.android.support:preference-v7:27.1.1:preference-v7-27.1.1.aar:a1798a826b4097d00e49280f412b21af08f9bf1179c2e3838dc339d9f843416d',
-			'com.android.support:recyclerview-v7:27.1.1:recyclerview-v7-27.1.1.aar:d735e4727878e99ef3980c10d15dc3468462fd509d4fb60cb8bd20b0f735085c',
-			'com.android.support:support-annotations:27.1.1:support-annotations-27.1.1.jar:3365960206c3d2b09e845f555e7f88f8effc8d2f00b369e66c4be384029299cf',
-			'com.android.support:support-compat:27.1.1:support-compat-27.1.1.aar:880ce01ff5be42b233ff8ec0c61cefb7dc3dc9500fea9e24423214813ac27ea2',
-			'com.android.support:support-core-ui:27.1.1:support-core-ui-27.1.1.aar:a3ae20e6d5dffba69ac97b99846d2738003af8563843d5f3c9dc4c35b4804241',
-			'com.android.support:support-core-utils:27.1.1:support-core-utils-27.1.1.aar:61036832c54e8701aae954fc3bf96d1d80bf8d9dd531bff77d72def456ba087a',
-			'com.android.support:support-fragment:27.1.1:support-fragment-27.1.1.aar:ec72d6ac36a1a0e6523bbddba33d73ffad070b9b3dd246cc44d8727a41ddb5e6',
-			'com.android.support:support-media-compat:27.1.1:support-media-compat-27.1.1.aar:55e9837dda88b74a8c812c63a78c63fd83c6c039a8c22d318492663a493585eb',
-			'com.android.support:support-v4:27.1.1:support-v4-27.1.1.aar:4f41dfc3e89f2738e45c86264a85c0934d055ee8ebe2020e23c97f303b80a48b',
-			'com.android.support:support-vector-drawable:27.1.1:support-vector-drawable-27.1.1.aar:1c0f421114cf4627cf208776d6eb4f76340c78b7e96fe6e12b3e6eb950caf1b9',
-			'com.android.support:transition:27.1.1:transition-27.1.1.aar:c0765b2f3c78696567ec5b3f519d22da1e3df11ac994625adf4bb4dc571caacc',
-			'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',
-			'com.android.tools.build:apksig:3.1.3:apksig-3.1.3.jar:7e1f8e675a6e768e5b56405e41d6c3cc05befe62e601b04177de1029902c9c89',
-			'com.android.tools.build:builder-model:3.1.3:builder-model-3.1.3.jar:06ad1c422d679fc698451479cb40ba863849d67bfd1de23f6d2c16d78b024b0b',
-			'com.android.tools.build:builder-test-api:3.1.3:builder-test-api-3.1.3.jar:4d989f780436794f0f8b2f50e9e079b786571eac90f26c208ab2ae6d4012f389',
-			'com.android.tools.build:builder:3.1.3:builder-3.1.3.jar:8a1092012c89d0ec1ee2eff09c5708c71ef4482a6862df8d3a44a67fccace01c',
-			'com.android.tools.build:gradle-api:3.1.3:gradle-api-3.1.3.jar:01e4df521456aef66514336f1d492346730dd1fb8f6433a89f62da834941ed72',
-			'com.android.tools.build:manifest-merger:26.1.3:manifest-merger-26.1.3.jar:1e4fc7e932adb4607082409800e5e6fccb42e6c5360ae5990094bf522f3ada55',
-			'com.android.tools.ddms:ddmlib:26.1.3:ddmlib-26.1.3.jar:c54931cd68df5d1ea2923b3b320eae47cd2307a5a916bb8674c0acf93cd1d3cd',
-			'com.android.tools.external.com-intellij:intellij-core:26.1.3:intellij-core-26.1.3.jar:af67f5535fef2e1a28b1007a4acb8c5deb6a1e33b8afe7b11d012c9e778ebcec',
-			'com.android.tools.external.com-intellij:kotlin-compiler:26.1.3:kotlin-compiler-26.1.3.jar:c746d2859dc11cc05c84b692b3498d3a621e0929511f8440ee009c6557838fd4',
-			'com.android.tools.external.org-jetbrains:uast:26.1.3:uast-26.1.3.jar:3f3f6651d0c7685a77ecb22e9c82d6b49fdf24322c17360768dc530678f43265',
-			'com.android.tools.layoutlib:layoutlib-api:26.1.3:layoutlib-api-26.1.3.jar:10bc73ce706c45629872d6a999dbe12116df64e24f47ff93b7b13121ff57b4b0',
-			'com.android.tools.lint:lint-api:26.1.3:lint-api-26.1.3.jar:6f97323f9af8deda86278717885b5c927f3766757db89709f52d11d42b6fb751',
-			'com.android.tools.lint:lint-checks:26.1.3:lint-checks-26.1.3.jar:73c3d53784c9ce3e6d5968506581918e0179645d20809927ca4a001dd766b001',
-			'com.android.tools.lint:lint-gradle-api:26.1.3:lint-gradle-api-26.1.3.jar:7ca3c4866ec21dc21d53a9d86f752b77ace6f6c610a0c9dc877313856c733d9d',
-			'com.android.tools.lint:lint-gradle:26.1.3:lint-gradle-26.1.3.jar:db0c354b8f4b6f6637e31f91c564785a59ff896325331fcbc3de7458e0b6c067',
-			'com.android.tools.lint:lint-kotlin:26.1.3:lint-kotlin-26.1.3.jar:94e2b0f4565a241561cfb8fc1222bb3f132a3b98d2a90421dbb72ee8358e7d68',
-			'com.android.tools.lint:lint:26.1.3:lint-26.1.3.jar:8d5f32c989c6d191d712e90ad3ca2d1c409313599551d04d834caa44d26c78df',
-			'com.android.tools:annotations:26.1.3:annotations-26.1.3.jar:c950430b24ac5d58fc97e7283b8f0115f99587e76e08b4e1e2aaa780f2d77323',
-			'com.android.tools:common:26.1.3:common-26.1.3.jar:7c31a90581a148ab219f615a59667f0dded7fa39b248529784474da3c2274ef2',
-			'com.android.tools:dvlib:26.1.3:dvlib-26.1.3.jar:0cae87906f53d3f1088366a916ed180a7312b6d9919b90797f238875c8492855',
-			'com.android.tools:repository:26.1.3:repository-26.1.3.jar:52d4539cc68db91b261e2a33b2c8206b26e05539078758dc28cfb3854adb4f59',
-			'com.android.tools:sdk-common:26.1.3:sdk-common-26.1.3.jar:1948603ca9ff22c7ebb3178000bffa3a9dd2ca1cc5cb0c793cae08468b8fcfc1',
-			'com.android.tools:sdklib:26.1.3:sdklib-26.1.3.jar:4adcfaad9514607098d2c51503c39811112d3050f4d1e744c01c7f08f591032b',
-			'com.github.bumptech.glide:glide:3.8.0:glide-3.8.0.jar:750d9e7b940dc0ee48f8680623b55d46e14e8727acc922d7b156e57e7c549655',
-			'com.google.android.apps.common.testing.accessibility.framework:accessibility-test-framework:2.0:accessibility-test-framework-2.0.jar:cdf16ef8f5b8023d003ce3cc1b0d51bda737762e2dab2fedf43d1c4292353f7f',
-			'com.google.android.apps.common.testing.accessibility.framework:accessibility-test-framework:2.1:accessibility-test-framework-2.1.jar:7b0aa6ed7553597ce0610684a9f7eca8021eee218f2e2f427c04a7fbf5f920bd',
-			'com.google.code.findbugs:jsr305:1.3.9:jsr305-1.3.9.jar:905721a0eea90a81534abb7ee6ef4ea2e5e645fa1def0a5cd88402df1b46c9ed',
-			'com.google.code.findbugs:jsr305:3.0.2:jsr305-3.0.2.jar:766ad2a0783f2687962c8ad74ceecc38a28b9f72a2d085ee438b7813e928d0c7',
-			'com.google.code.gson:gson:2.7:gson-2.7.jar:2d43eb5ea9e133d2ee2405cc14f5ee08951b8361302fdd93494a3a997b508d32',
-			'com.google.dagger:dagger-compiler:2.0.2:dagger-compiler-2.0.2.jar:b74bc9de063dd4c6400b232231f2ef5056145b8fbecbf5382012007dd1c071b3',
-			'com.google.dagger:dagger-producers:2.0-beta:dagger-producers-2.0-beta.jar:99ec15e8a0507ba569e7655bc1165ee5e5ca5aa914b3c8f7e2c2458f724edd6b',
-			'com.google.dagger:dagger:2.0.2:dagger-2.0.2.jar:84c0282ed8be73a29e0475d639da030b55dee72369e58dd35ae7d4fe6243dcf9',
-			'com.google.errorprone:error_prone_annotations:2.0.18:error_prone_annotations-2.0.18.jar:cb4cfad870bf563a07199f3ebea5763f0dec440fcda0b318640b1feaa788656b',
-			'com.google.guava:guava:18.0:guava-18.0.jar:d664fbfc03d2e5ce9cab2a44fb01f1d0bf9dfebeccc1a473b1f9ea31f79f6f99',
-			'com.google.guava:guava:20.0:guava-20.0.jar:36a666e3b71ae7f0f0dca23654b67e086e6c93d192f60ba5dfd5519db6c288c8',
-			'com.google.guava:guava:22.0:guava-22.0.jar:1158e94c7de4da480873f0b4ab4a1da14c0d23d4b1902cc94a58a6f0f9ab579e',
-			'com.google.j2objc:j2objc-annotations:1.1:j2objc-annotations-1.1.jar:40ceb7157feb263949e0f503fe5f71689333a621021aa20ce0d0acee3badaa0f',
-			'com.google.jimfs:jimfs:1.1:jimfs-1.1.jar:c4828e28d7c0a930af9387510b3bada7daa5c04d7c25a75c7b8b081f1c257ddd',
-			'com.google.protobuf:protobuf-java:2.6.1:protobuf-java-2.6.1.jar:55aa554843983f431df5616112cf688d38aa17c132357afd1c109435bfdac4e6',
-			'com.google.protobuf:protobuf-java:3.4.0:protobuf-java-3.4.0.jar:dce7e66b32456a1b1198da0caff3a8acb71548658391e798c79369241e6490a4',
-			'com.google.zxing:core:3.3.0:core-3.3.0.jar:bba7724e02a997cec38213af77133ee8e24b0d5cf5fa7ecbc16a4fa93f11ee0d',
-			'com.googlecode.json-simple:json-simple:1.1:json-simple-1.1.jar:2d9484f4c649f708f47f9a479465fc729770ee65617dca3011836602264f6439',
-			'com.ibm.icu:icu4j:53.1:icu4j-53.1.jar:e37a4467bac5cdeb02c5c4b8e5063d2f4e67b69e3c7df6d6b610f13185572bab',
-			'com.jpardogo.materialtabstrip:library:1.1.0:library-1.1.0.aar:24d19232b319f8c73e25793432357919a7ed972186f57a3b2c9093ea74ad8311',
-			'com.squareup:javawriter:2.1.1:javawriter-2.1.1.jar:f699823d0081f69cbb676c1845ea222e0ada79bc88a53e5d22d8bd02d328f57e',
-			'com.squareup:javawriter:2.5.0:javawriter-2.5.0.jar:fcfb09fb0ea0aa97d3cfe7ea792398081348e468f126b3603cb3803f240197f0',
-			'com.sun.activation:javax.activation:1.2.0:javax.activation-1.2.0.jar:993302b16cd7056f21e779cc577d175a810bb4900ef73cd8fbf2b50f928ba9ce',
-			'com.sun.istack:istack-commons-runtime:2.21:istack-commons-runtime-2.21.jar:c33e67a0807095f02a0e2da139412dd7c4f9cc1a4c054b3e434f96831ba950f4',
-			'com.sun.xml.fastinfoset:FastInfoset:1.2.13:FastInfoset-1.2.13.jar:27a77db909f3c2833c0b1a37c55af1db06045118ad2eed96ce567b6632bce038',
-			'com.thoughtworks.xstream:xstream:1.4.8:xstream-1.4.8.jar:a219a1abf948400b669d08be73a6f9209fb720d237e5ff74c223bffe5f9df93d',
-			'commons-codec:commons-codec:1.6:commons-codec-1.6.jar:54b34e941b8e1414bd3e40d736efd3481772dc26db3296f6aa45cec9f6203d86',
-			'commons-logging:commons-logging:1.1.1:commons-logging-1.1.1.jar:ce6f913cad1f0db3aad70186d65c5bc7ffcc9a99e3fe8e0b137312819f7c362f',
-			'de.hdodenhof:circleimageview:2.2.0:circleimageview-2.2.0.aar:bc34761dcd5036229ac1ffed6b5b1bef722ad5b097a2c8bba1c5ed2cd4b5c82b',
-			'info.guardianproject.panic:panic:0.5:panic-0.5.jar:a7ed9439826db2e9901649892cf9afbe76f00991b768d8f4c26332d7c9406cb2',
-			'info.guardianproject.trustedintents:trustedintents:0.2:trustedintents-0.2.jar:6221456d8821a8d974c2acf86306900237cf6afaaa94a4c9c44e161350f80f3e',
-			'it.unimi.dsi:fastutil:7.2.0:fastutil-7.2.0.jar:74fa208043740642f7e6eb09faba15965218ad2f50ce3020efb100136e4b591c',
-			'javax.annotation:jsr250-api:1.0:jsr250-api-1.0.jar:a1a922d0d9b6d183ed3800dfac01d1e1eb159f0e8c6f94736931c1def54a941f',
-			'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
-			'javax.xml.bind:jaxb-api:2.2.12-b140109.1041:jaxb-api-2.2.12-b140109.1041.jar:b5e60cd8b7b5ff01ce4a74c5dd008f4fbd14ced3495d0b47b85cfedc182211f2',
-			'junit:junit:4.12:junit-4.12.jar:59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a',
-			'nekohtml:nekohtml:1.9.6.2:nekohtml-1.9.6.2.jar:fdff6cfa9ed9cc911c842a5d2395f209ec621ef1239d46810e9e495809d3ae09',
-			'nekohtml:xercesMinimal:1.9.6.2:xercesMinimal-1.9.6.2.jar:95b8b357d19f63797dd7d67622fd3f18374d64acbc6584faba1c7759a31e8438',
-			'net.bytebuddy:byte-buddy-agent:1.6.14:byte-buddy-agent-1.6.14.jar:c141a2d6809c3eeff4a43d25992826abccebdd4b793af3e7a5f346e88ae73a33',
-			'net.bytebuddy:byte-buddy:1.6.14:byte-buddy-1.6.14.jar:917758b3c651e278a15a029ba1d42dbf802d8b0e1fe2aa4b81c5750c64f461c1',
-			'net.sf.jopt-simple:jopt-simple:4.9:jopt-simple-4.9.jar:26c5856e954b5f864db76f13b86919b59c6eecf9fd930b96baa8884626baf2f5',
-			'net.sf.kxml:kxml2:2.3.0:kxml2-2.3.0.jar:f264dd9f79a1fde10ce5ecc53221eff24be4c9331c830b7d52f2f08a7b633de2',
-			'org.apache.ant:ant-launcher:1.9.4:ant-launcher-1.9.4.jar:7bccea20b41801ca17bcbc909a78c835d0f443f12d639c77bd6ae3d05861608d',
-			'org.apache.ant:ant:1.9.4:ant-1.9.4.jar:649ae0730251de07b8913f49286d46bba7b92d47c5f332610aa426c4f02161d8',
-			'org.apache.commons:commons-compress:1.12:commons-compress-1.12.jar:2c1542faf343185b7cab9c3d55c8ae5471d6d095d3887a4adefdbdf2984dc0b6',
-			'org.apache.httpcomponents:httpclient:4.2.6:httpclient-4.2.6.jar:362e9324ee7c697e21279e20077b52737ddef3f1b2c1a7abe5ad34b465145550',
-			'org.apache.httpcomponents:httpcore:4.2.5:httpcore-4.2.5.jar:e5e82da4cc66c8d917bbf743e3c0752efe8522735e7fc9dbddb65bccea81cfe9',
-			'org.apache.httpcomponents:httpmime:4.1:httpmime-4.1.jar:31629566148e8a47688ae43b420abc3ecd783ed15b33bebc00824bf24c9b15aa',
-			'org.apache.maven.wagon:wagon-file:1.0-beta-6:wagon-file-1.0-beta-6.jar:7298feeb36ff14dd933c38e62585fb9973fea32fb3c4bc5379428cb1aac5dd3c',
-			'org.apache.maven.wagon:wagon-http-lightweight:1.0-beta-6:wagon-http-lightweight-1.0-beta-6.jar:be214032de23c6b520b79c1ccdb160948e0c67ed7c11984b7ec4ca5537867b4e',
-			'org.apache.maven.wagon:wagon-http-shared:1.0-beta-6:wagon-http-shared-1.0-beta-6.jar:f095c882716d49269a806685dcb256fa6a36389b2713ac56bb758bf8693565a2',
-			'org.apache.maven.wagon:wagon-provider-api:1.0-beta-6:wagon-provider-api-1.0-beta-6.jar:e116f32edcb77067289a3148143f2c0c97b27cf9a1342f8108ee37dec4868861',
-			'org.apache.maven:maven-ant-tasks:2.1.3:maven-ant-tasks-2.1.3.jar:f16b5ea711dfe0323454b880180aa832420ec039936e4aa75fb978748634808a',
-			'org.apache.maven:maven-artifact-manager:2.2.1:maven-artifact-manager-2.2.1.jar:d1e247c4ed3952385fd704ac9db2a222247cfe7d20508b4f3c76b90f857952ed',
-			'org.apache.maven:maven-artifact:2.2.1:maven-artifact-2.2.1.jar:d53062ffe8677a4f5e1ad3a1d1fa37ed600fab39166d39be7ed204635c5f839b',
-			'org.apache.maven:maven-error-diagnostics:2.2.1:maven-error-diagnostics-2.2.1.jar:b3005544708f8583e455c22b09a4940596a057108bccdadb9db4d8e048091fed',
-			'org.apache.maven:maven-model:2.2.1:maven-model-2.2.1.jar:153b32f474fd676ec36ad807c508885005139140fc92168bb76bf6be31f8efb8',
-			'org.apache.maven:maven-plugin-registry:2.2.1:maven-plugin-registry-2.2.1.jar:4ad0673155d7e0e5cf6d13689802d8d507f38e5ea00a6d2fb92aef206108213d',
-			'org.apache.maven:maven-profile:2.2.1:maven-profile-2.2.1.jar:ecaffef655fea6b138f0855a12f7dbb59fc0d6bffb5c1bfd31803cccb49ea08c',
-			'org.apache.maven:maven-project:2.2.1:maven-project-2.2.1.jar:24ddb65b7a6c3befb6267ce5f739f237c84eba99389265c30df67c3dd8396a40',
-			'org.apache.maven:maven-repository-metadata:2.2.1:maven-repository-metadata-2.2.1.jar:5fe283f47b0e7f7d95a4252af3fa7a0db4d8f080cd9df308608c0472b8f168a1',
-			'org.apache.maven:maven-settings:2.2.1:maven-settings-2.2.1.jar:9a9f556713a404e770c9dbdaed7eb086078014c989291960c76fdde6db4192f7',
-			'org.beanshell:bsh:1.3.0:bsh-1.3.0.jar:9b04edc75d19db54f1b4e8b5355e9364384c6cf71eb0a1b9724c159d779879f8',
-			'org.bouncycastle:bcpkix-jdk15on:1.56:bcpkix-jdk15on-1.56.jar:7043dee4e9e7175e93e0b36f45b1ec1ecb893c5f755667e8b916eb8dd201c6ca',
-			'org.bouncycastle:bcprov-jdk15on:1.52:bcprov-jdk15on-1.52.jar:0dc4d181e4d347893c2ddbd2e6cd5d7287fc651c03648fa64b2341c7366b1773',
-			'org.bouncycastle:bcprov-jdk15on:1.56:bcprov-jdk15on-1.56.jar:963e1ee14f808ffb99897d848ddcdb28fa91ddda867eb18d303e82728f878349',
-			'org.codehaus.groovy:groovy-all:2.4.12:groovy-all-2.4.12.jar:6a56af4bd48903d56bec62821876cadefafd007360cc6bd0d8f7aa8d72b38be4',
-			'org.codehaus.mojo:animal-sniffer-annotations:1.14:animal-sniffer-annotations-1.14.jar:2068320bd6bad744c3673ab048f67e30bef8f518996fa380033556600669905d',
-			'org.codehaus.plexus:plexus-container-default:1.0-alpha-9-stable-1:plexus-container-default-1.0-alpha-9-stable-1.jar:7c758612888782ccfe376823aee7cdcc7e0cdafb097f7ef50295a0b0c3a16edf',
-			'org.codehaus.plexus:plexus-interpolation:1.11:plexus-interpolation-1.11.jar:fd9507feb858fa620d1b4aa4b7039fdea1a77e09d3fd28cfbddfff468d9d8c28',
-			'org.codehaus.plexus:plexus-utils:1.5.15:plexus-utils-1.5.15.jar:2ca121831e597b4d8f2cb22d17c5c041fc23a7777ceb6bfbdd4dfb34bbe7d997',
-			'org.glassfish.jaxb:jaxb-core:2.2.11:jaxb-core-2.2.11.jar:37bcaee8ebb04362c8352a5bf6221b86967ecdab5164c696b10b9a2bb587b2aa',
-			'org.glassfish.jaxb:jaxb-runtime:2.2.11:jaxb-runtime-2.2.11.jar:a874f2351cfba8e2946be3002d10c18a6da8f21b52ba2acf52f2b85d5520ed70',
-			'org.glassfish.jaxb:txw2:2.2.11:txw2-2.2.11.jar:272a3ccad45a4511351920cd2a8633c53cab8d5220c7a92954da5526bb5eafea',
-			'org.hamcrest:hamcrest-core:1.3:hamcrest-core-1.3.jar:66fdef91e9739348df7a096aa384a5685f4e875584cce89386a7a47251c4d8e9',
-			'org.hamcrest:hamcrest-integration:1.3:hamcrest-integration-1.3.jar:70f418efbb506c5155da5f9a5a33262ea08a9e4d7fea186aa9015c41a7224ac2',
-			'org.hamcrest:hamcrest-library:1.3:hamcrest-library-1.3.jar:711d64522f9ec410983bd310934296da134be4254a125080a0416ec178dfad1c',
-			'org.jetbrains.kotlin:kotlin-reflect:1.2.0:kotlin-reflect-1.2.0.jar:4f48a872bad6e4d9c053f4ad610d11e4012ad7e58dc19a03dd5eb811f36069dd',
-			'org.jetbrains.kotlin:kotlin-stdlib-jre7:1.2.0:kotlin-stdlib-jre7-1.2.0.jar:c7a20fb951d437797afe8980aff6c1e5a03f310c661ba58ba1d4fa90cb0f2926',
-			'org.jetbrains.kotlin:kotlin-stdlib-jre8:1.2.0:kotlin-stdlib-jre8-1.2.0.jar:633524eee6ef1941f7cb1dab7ee3927b0a221ceee9047aeb5515f4cbb990c82a',
-			'org.jetbrains.kotlin:kotlin-stdlib:1.2.0:kotlin-stdlib-1.2.0.jar:05cfd9f5ac0b41910703a8925f7211a495909b27a2ffdd1c5106f1689aeafcd4',
-			'org.jetbrains.trove4j:trove4j:20160824:trove4j-20160824.jar:1917871c8deb468307a584680c87a44572f5a8b0b98c6d397fc0f5f86596dbe7',
-			'org.jetbrains:annotations:13.0:annotations-13.0.jar:ace2a10dc8e2d5fd34925ecac03e4988b2c0f851650c94b8cef49ba1bd111478',
-			'org.jmock:jmock-junit4:2.8.2:jmock-junit4-2.8.2.jar:f7ee4df4f7bd7b7f1cafad3b99eb74d579f109d5992ff625347352edb55e674c',
-			'org.jmock:jmock-legacy:2.8.2:jmock-legacy-2.8.2.jar:f2b985a5c08a9edb7f37612330c058809da3f6a6d63ce792426ebf8ff0d6d31b',
-			'org.jmock:jmock-testjar:2.8.2:jmock-testjar-2.8.2.jar:8900860f72c474e027cf97fe78dcbf154a1aa7fc62b6845c5fb4e4f3c7bc8760',
-			'org.jmock:jmock:2.8.2:jmock-2.8.2.jar:6c73cb4a2e6dbfb61fd99c9a768539c170ab6568e57846bd60dbf19596b65b16',
-			'org.jvnet.staxex:stax-ex:1.7.7:stax-ex-1.7.7.jar:a31ff7d77163c0deb09e7fee59ad35ae44c2cee2cc8552a116ccd1583d813fb4',
-			'org.mockito:mockito-core:2.8.9:mockito-core-2.8.9.jar:a2bb9b8b40d81bb02ccb84259524c0f4911f73c6577bfc7ddd940b8fc729b6e6',
-			'org.objenesis:objenesis:2.5:objenesis-2.5.jar:293328e1b0d31ed30bb89fca542b6c52fac00989bb0e62eb9d98d630c4dd6b7c',
-			'org.ow2.asm:asm-analysis:5.1:asm-analysis-5.1.jar:a34658f5c5de4b573eef21131cc32cc25f7b66407944f312b28ec2e56abb1fa9',
-			'org.ow2.asm:asm-commons:5.0.1:asm-commons-5.0.1.jar:fb1cb7fa27d892712ced8fbf8d027eb5052ecd3999dba1ba47824357accb40e7',
-			'org.ow2.asm:asm-commons:5.1:asm-commons-5.1.jar:97b3786e1f55e74bddf8ad102bf50e33bbcbc1f6b7fd7b36f0bbbb25cd4981be',
-			'org.ow2.asm:asm-tree:5.0.1:asm-tree-5.0.1.jar:ff2aceed10da9930a44f6c8f81c6372d5e55eb59c4e0ea9d37f77dfd765fa9fa',
-			'org.ow2.asm:asm-tree:5.1:asm-tree-5.1.jar:c0de2bbc4cb8297419659813ecd4ed1d077ed1dd5c1f5544cc5143e493e84c10',
-			'org.ow2.asm:asm-util:5.1:asm-util-5.1.jar:ee032c39ae5e3cd099148fbba9a2124f9ed613e5cb93e03ee0fa8808ce364040',
-			'org.ow2.asm:asm:5.0.4:asm-5.0.4.jar:896618ed8ae62702521a78bc7be42b7c491a08e6920a15f89a3ecdec31e9a220',
-			'org.ow2.asm:asm:5.1:asm-5.1.jar:d2da399a9967c69f0a21739256fa79d284222c223082cacadc17372244764b54',
-			'org.robolectric:annotations:3.5.1:annotations-3.5.1.jar:14db0f7d2299c5400ff7764bb37b4fa80306582d8965fdf6999091723e2384ce',
-			'org.robolectric:junit:3.5.1:junit-3.5.1.jar:b2e81b7d5a22755f2ea76aa9bbbd4359d61c4cb9577193ccfbb8f97378ed293b',
-			'org.robolectric:resources:3.5.1:resources-3.5.1.jar:22a5564590c8bfd8df7efb2b0c7d9942b46a0beb59ba38899d59c1270f293b1c',
-			'org.robolectric:robolectric:3.5.1:robolectric-3.5.1.jar:603cf898f93b854f18021fab452aca3fe482368eeb2e720988ae82212ebcf4b6',
-			'org.robolectric:sandbox:3.5.1:sandbox-3.5.1.jar:beff8c3c1e840e0f7f78aadef170f347bae349f098babfc176765f499a4bcbb5',
-			'org.robolectric:shadowapi:3.5.1:shadowapi-3.5.1.jar:6d574f9ae0922791eb8f06979f0010997d4b862c7aec96d485ae797ddfc13278',
-			'org.robolectric:shadows-framework:3.5.1:shadows-framework-3.5.1.jar:597b54cc1a494799d783921c6ac04352f33e94fca8e00f299d4ca192db79e3fc',
-			'org.robolectric:shadows-support-v4:3.0:shadows-support-v4-3.0.jar:66bcc3257b037d72998e860d67b1bc58215b7eeac8ad860fcc3e613332d88619',
-			'org.robolectric:utils:3.5.1:utils-3.5.1.jar:d7d77326867e6d903156ebb18c244819b26aebe3aa82a1c57081081a0b6c4f63',
-			'tools.fastlane:screengrab:1.1.0:screengrab-1.1.0.aar:03ce3868ee8a0082d14e7a1de0999f91531c0cc794392688beb08ee9bc4495fd',
-			'uk.co.samuelwall:material-tap-target-prompt:2.8.0:material-tap-target-prompt-2.8.0.aar:ac70770c05bbc4675a1d5712c0e53d46ee4fa961b74947589fce50d8003065ec',
-			'xmlpull:xmlpull:1.1.3.1:xmlpull-1.1.3.1.jar:34e08ee62116071cbb69c0ed70d15a7a5b208d62798c59f2120bb8929324cb63',
-			'xpp3:xpp3_min:1.1.4c:xpp3_min-1.1.4c.jar:bfc90e9e32d0eab1f397fb974b5f150a815188382ac41f372a7149d5bc178008',
-	]
-}
-
 def getStdout = { command, defaultValue ->
 	def stdout = new ByteArrayOutputStream()
 	try {
@@ -296,7 +117,7 @@ android {
 			minSdkVersion 18
 			applicationIdSuffix ".screenshot" // = org.briarproject.briar.android.screenshot.debug
 		}
-		main {
+		official {
 			dimension "version"
 		}
 	}
@@ -365,4 +186,7 @@ project.afterEvaluate {
 	preBuild.dependsOn.add(verifyTranslations)
 }
 
-
+tasks.withType(Test) {
+	// Use entropy-gathering device specified on command line, if any
+	systemProperty 'java.security.egd', System.getProperty('java.security.egd')
+}

briar-android/src/androidTest/java/org/briarproject/briar/android/BriarUiTestComponent.java

@@ -4,7 +4,6 @@ import org.briarproject.bramble.BrambleAndroidModule;
 import org.briarproject.bramble.BrambleCoreModule;
 import org.briarproject.bramble.account.BriarAccountModule;
 import org.briarproject.briar.BriarCoreModule;
-import org.briarproject.briar.android.login.PasswordActivityTest;
 import org.briarproject.briar.android.login.SetupActivityScreenshotTest;
 import org.briarproject.briar.android.navdrawer.NavDrawerActivityTest;
 import org.briarproject.briar.android.settings.SettingsActivityScreenshotTest;
@@ -24,7 +23,6 @@ import dagger.Component;
 public interface BriarUiTestComponent extends AndroidComponent {
 
 	void inject(SetupActivityScreenshotTest test);
-	void inject(PasswordActivityTest test);
 	void inject(NavDrawerActivityTest test);
 	void inject(SettingsActivityScreenshotTest test);
 

briar-android/src/main/AndroidManifest.xml

@@ -4,7 +4,7 @@
 	xmlns:android="http://schemas.android.com/apk/res/android">
 
 	<uses-feature android:name="android.hardware.bluetooth" android:required="false"/>
-	<uses-feature android:name="android.hardware.camera" />
+	<uses-feature android:name="android.hardware.camera" android:required="false"/>
 	<uses-feature android:name="android.hardware.touchscreen" android:required="false" />
 
 	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
@@ -402,5 +402,11 @@
 			android:theme="@android:style/Theme.NoDisplay">
 		</activity>
 
+		<activity
+			android:name=".android.login.UnlockActivity"
+			android:label="@string/lock_unlock"
+			android:launchMode="singleTask"
+			android:theme="@style/BriarTheme.NoActionBar"/>
+
 	</application>
 </manifest>

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

@@ -28,6 +28,7 @@ import org.briarproject.briar.android.login.SignInReminderReceiver;
 import org.briarproject.briar.android.reporting.BriarReportSender;
 import org.briarproject.briar.api.android.AndroidNotificationManager;
 import org.briarproject.briar.api.android.DozeWatchdog;
+import org.briarproject.briar.api.android.LockManager;
 import org.briarproject.briar.api.android.ScreenFilterMonitor;
 import org.briarproject.briar.api.blog.BlogManager;
 import org.briarproject.briar.api.blog.BlogPostFactory;
@@ -146,6 +147,8 @@ public interface AndroidComponent
 
 	AccountManager accountManager();
 
+	LockManager lockManager();
+
 	void inject(SignInReminderReceiver briarService);
 
 	void inject(BriarService briarService);

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

@@ -2,6 +2,7 @@ package org.briarproject.briar.android;
 
 import android.annotation.TargetApi;
 import android.app.Application;
+import android.app.Notification;
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
@@ -10,8 +11,8 @@ import android.content.Intent;
 import android.net.Uri;
 import android.support.annotation.StringRes;
 import android.support.annotation.UiThread;
+import android.support.v4.app.NotificationCompat;
 import android.support.v4.app.TaskStackBuilder;
-import android.support.v4.content.ContextCompat;
 
 import org.briarproject.bramble.api.Multiset;
 import org.briarproject.bramble.api.contact.ContactId;
@@ -33,8 +34,10 @@ import org.briarproject.bramble.util.StringUtils;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.contact.ConversationActivity;
 import org.briarproject.briar.android.forum.ForumActivity;
+import org.briarproject.briar.android.login.SignInReminderReceiver;
 import org.briarproject.briar.android.navdrawer.NavDrawerActivity;
 import org.briarproject.briar.android.privategroup.conversation.GroupActivity;
+import org.briarproject.briar.android.splash.SplashScreenActivity;
 import org.briarproject.briar.android.util.BriarNotificationBuilder;
 import org.briarproject.briar.api.android.AndroidNotificationManager;
 import org.briarproject.briar.api.blog.event.BlogPostAddedEvent;
@@ -62,13 +65,19 @@ import javax.inject.Inject;
 import static android.app.Notification.DEFAULT_LIGHTS;
 import static android.app.Notification.DEFAULT_SOUND;
 import static android.app.Notification.DEFAULT_VIBRATE;
-import static android.app.Notification.VISIBILITY_SECRET;
 import static android.app.NotificationManager.IMPORTANCE_DEFAULT;
+import static android.app.NotificationManager.IMPORTANCE_LOW;
 import static android.content.Context.NOTIFICATION_SERVICE;
 import static android.content.Intent.FLAG_ACTIVITY_CLEAR_TOP;
+import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
 import static android.os.Build.VERSION.SDK_INT;
 import static android.support.v4.app.NotificationCompat.CATEGORY_MESSAGE;
+import static android.support.v4.app.NotificationCompat.CATEGORY_SERVICE;
 import static android.support.v4.app.NotificationCompat.CATEGORY_SOCIAL;
+import static android.support.v4.app.NotificationCompat.PRIORITY_LOW;
+import static android.support.v4.app.NotificationCompat.PRIORITY_MIN;
+import static android.support.v4.app.NotificationCompat.VISIBILITY_SECRET;
+import static android.support.v4.content.ContextCompat.getColor;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.briar.android.activity.BriarActivity.GROUP_ID;
@@ -107,6 +116,7 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 	private int nextRequestId = 0;
 	private ContactId blockedContact = null;
 	private GroupId blockedGroup = null;
+	private boolean blockSignInReminder = false;
 	private boolean blockContacts = false, blockGroups = false;
 	private boolean blockForums = false, blockBlogs = false;
 	private boolean blockIntroductions = false;
@@ -166,8 +176,7 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 		nc.setLockscreenVisibility(VISIBILITY_SECRET);
 		nc.enableVibration(true);
 		nc.enableLights(true);
-		nc.setLightColor(
+		nc.setLightColor(getColor(appContext, R.color.briar_green_light));
-				ContextCompat.getColor(appContext, R.color.briar_green_light));
 		notificationManager.createNotificationChannel(nc);
 	}
 
@@ -264,6 +273,47 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 		});
 	}
 
+	@UiThread
+	@Override
+	public Notification getForegroundNotification() {
+		return getForegroundNotification(false);
+	}
+
+	@UiThread
+	private Notification getForegroundNotification(boolean locked) {
+		int title = locked ? R.string.lock_is_locked :
+				R.string.ongoing_notification_title;
+		int text = locked ? R.string.lock_tap_to_unlock :
+				R.string.ongoing_notification_text;
+		int icon = locked ? R.drawable.startup_lock :
+				R.drawable.notification_ongoing;
+		// Ongoing foreground notification that shows BriarService is running
+		NotificationCompat.Builder b =
+				new NotificationCompat.Builder(appContext, ONGOING_CHANNEL_ID);
+		b.setSmallIcon(icon);
+		b.setColor(getColor(appContext, R.color.briar_primary));
+		b.setContentTitle(appContext.getText(title));
+		b.setContentText(appContext.getText(text));
+		b.setWhen(0); // Don't show the time
+		b.setOngoing(true);
+		Intent i = new Intent(appContext, NavDrawerActivity.class);
+		i.setFlags(FLAG_ACTIVITY_NEW_TASK | FLAG_ACTIVITY_CLEAR_TOP);
+		b.setContentIntent(PendingIntent.getActivity(appContext, 0, i, 0));
+		if (SDK_INT >= 21) {
+			b.setCategory(CATEGORY_SERVICE);
+			b.setVisibility(VISIBILITY_SECRET);
+		}
+		b.setPriority(PRIORITY_MIN);
+		return b.build();
+	}
+
+	@UiThread
+	@Override
+	public void updateForegroundNotification(boolean locked) {
+		Notification n = getForegroundNotification(locked);
+		notificationManager.notify(ONGOING_NOTIFICATION_ID, n);
+	}
+
 	private void showContactNotification(ContactId c) {
 		androidExecutor.runOnUiThread(() -> {
 			if (blockContacts) return;
@@ -612,6 +662,58 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 				this::clearIntroductionSuccessNotification);
 	}
 
+	@Override
+	public void showSignInNotification() {
+		if (blockSignInReminder) return;
+		if (SDK_INT >= 26) {
+			NotificationChannel channel =
+					new NotificationChannel(REMINDER_CHANNEL_ID, appContext
+							.getString(
+									R.string.reminder_notification_channel_title),
+							IMPORTANCE_LOW);
+			channel.setLockscreenVisibility(
+					NotificationCompat.VISIBILITY_SECRET);
+			notificationManager.createNotificationChannel(channel);
+		}
+
+		NotificationCompat.Builder b =
+				new NotificationCompat.Builder(appContext, REMINDER_CHANNEL_ID);
+		b.setSmallIcon(R.drawable.ic_signout);
+		b.setColor(getColor(appContext, R.color.briar_primary));
+		b.setContentTitle(
+				appContext.getText(R.string.reminder_notification_title));
+		b.setContentText(
+				appContext.getText(R.string.reminder_notification_text));
+		b.setAutoCancel(true);
+		b.setWhen(0); // Don't show the time
+		b.setPriority(PRIORITY_LOW);
+
+		// Add a 'Dismiss' action
+		String actionTitle =
+				appContext.getString(R.string.reminder_notification_dismiss);
+		Intent i1 = new Intent(appContext, SignInReminderReceiver.class);
+		i1.setAction(ACTION_DISMISS_REMINDER);
+		PendingIntent actionIntent =
+				PendingIntent.getBroadcast(appContext, 0, i1, 0);
+		b.addAction(0, actionTitle, actionIntent);
+
+		Intent i = new Intent(appContext, SplashScreenActivity.class);
+		i.setFlags(FLAG_ACTIVITY_NEW_TASK | FLAG_ACTIVITY_CLEAR_TOP);
+		b.setContentIntent(PendingIntent.getActivity(appContext, 0, i, 0));
+
+		notificationManager.notify(REMINDER_NOTIFICATION_ID, b.build());
+	}
+
+	@Override
+	public void clearSignInNotification() {
+		notificationManager.cancel(REMINDER_NOTIFICATION_ID);
+	}
+
+	@Override
+	public void blockSignInNotification() {
+		blockSignInReminder = true;
+	}
+
 	@Override
 	public void blockNotification(GroupId g) {
 		androidExecutor.runOnUiThread((Runnable) () -> blockedGroup = g);

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

@@ -21,15 +21,18 @@ import org.briarproject.bramble.api.reporting.DevConfig;
 import org.briarproject.bramble.api.system.AndroidExecutor;
 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.api.system.Scheduler;
 import org.briarproject.bramble.plugin.bluetooth.AndroidBluetoothPluginFactory;
 import org.briarproject.bramble.plugin.tcp.AndroidLanTcpPluginFactory;
+import org.briarproject.bramble.plugin.tor.AndroidTorPluginFactory;
 import org.briarproject.bramble.plugin.tor.CircumventionProvider;
-import org.briarproject.bramble.plugin.tor.TorPluginFactory;
 import org.briarproject.bramble.util.AndroidUtils;
 import org.briarproject.bramble.util.StringUtils;
+import org.briarproject.briar.android.account.LockManagerImpl;
 import org.briarproject.briar.api.android.AndroidNotificationManager;
 import org.briarproject.briar.api.android.DozeWatchdog;
+import org.briarproject.briar.api.android.LockManager;
 import org.briarproject.briar.api.android.ScreenFilterMonitor;
 
 import java.io.File;
@@ -95,14 +98,16 @@ public class AppModule {
 			SocketFactory torSocketFactory, BackoffFactory backoffFactory,
 			Application app, NetworkManager networkManager,
 			LocationUtils locationUtils, EventBus eventBus,
+			ResourceProvider resourceProvider,
 			CircumventionProvider circumventionProvider, Clock clock) {
 		Context appContext = app.getApplicationContext();
 		DuplexPluginFactory bluetooth =
 				new AndroidBluetoothPluginFactory(ioExecutor, androidExecutor,
 						appContext, random, eventBus, backoffFactory);
-		DuplexPluginFactory tor = new TorPluginFactory(ioExecutor, scheduler,
+		DuplexPluginFactory tor = new AndroidTorPluginFactory(ioExecutor,
-				appContext, networkManager, locationUtils, eventBus,
+				scheduler, appContext, networkManager, locationUtils, eventBus,
-				torSocketFactory, backoffFactory, circumventionProvider, clock);
+				torSocketFactory, backoffFactory, resourceProvider,
+				circumventionProvider, clock);
 		DuplexPluginFactory lan = new AndroidLanTcpPluginFactory(ioExecutor,
 				eventBus, backoffFactory, appContext);
 		Collection<DuplexPluginFactory> duplex = asList(bluetooth, tor, lan);
@@ -197,4 +202,13 @@ public class AppModule {
 		return dozeWatchdog;
 	}
 
+	@Provides
+	@Singleton
+	LockManager provideLockManager(LifecycleManager lifecycleManager,
+			EventBus eventBus, LockManagerImpl lockManager) {
+		lifecycleManager.registerService(lockManager);
+		eventBus.addListener(lockManager);
+		return lockManager;
+	}
+
 }

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

@@ -2,6 +2,7 @@ package org.briarproject.briar.android;
 
 import android.app.ActivityManager;
 import android.app.ActivityManager.RunningAppProcessInfo;
+import android.app.Notification;
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
@@ -15,7 +16,6 @@ import android.content.ServiceConnection;
 import android.os.Binder;
 import android.os.IBinder;
 import android.support.v4.app.NotificationCompat;
-import android.support.v4.content.ContextCompat;
 
 import org.briarproject.bramble.api.account.AccountManager;
 import org.briarproject.bramble.api.crypto.SecretKey;
@@ -25,6 +25,7 @@ import org.briarproject.bramble.api.system.AndroidExecutor;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.logout.HideUiActivity;
 import org.briarproject.briar.android.navdrawer.NavDrawerActivity;
+import org.briarproject.briar.api.android.AndroidNotificationManager;
 
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -44,8 +45,6 @@ import static android.content.Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS;
 import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
 import static android.content.Intent.FLAG_ACTIVITY_NO_ANIMATION;
 import static android.os.Build.VERSION.SDK_INT;
-import static android.support.v4.app.NotificationCompat.CATEGORY_SERVICE;
-import static android.support.v4.app.NotificationCompat.PRIORITY_MIN;
 import static android.support.v4.app.NotificationCompat.VISIBILITY_SECRET;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
@@ -74,6 +73,8 @@ public class BriarService extends Service {
 	@Nullable
 	private BroadcastReceiver receiver = null;
 
+	@Inject
+	AndroidNotificationManager notificationManager;
 	@Inject
 	AccountManager accountManager;
 
@@ -121,24 +122,9 @@ public class BriarService extends Service {
 			failureChannel.setLockscreenVisibility(VISIBILITY_SECRET);
 			nm.createNotificationChannel(failureChannel);
 		}
-		// Show an ongoing notification that the service is running
+		Notification foregroundNotification =
-		NotificationCompat.Builder b =
+				notificationManager.getForegroundNotification();
-				new NotificationCompat.Builder(this, ONGOING_CHANNEL_ID);
+		startForeground(ONGOING_NOTIFICATION_ID, foregroundNotification);
-		b.setSmallIcon(R.drawable.notification_ongoing);
-		b.setColor(ContextCompat.getColor(this, R.color.briar_primary));
-		b.setContentTitle(getText(R.string.ongoing_notification_title));
-		b.setContentText(getText(R.string.ongoing_notification_text));
-		b.setWhen(0); // Don't show the time
-		b.setOngoing(true);
-		Intent i = new Intent(this, NavDrawerActivity.class);
-		i.setFlags(FLAG_ACTIVITY_NEW_TASK | FLAG_ACTIVITY_CLEAR_TOP);
-		b.setContentIntent(PendingIntent.getActivity(this, 0, i, 0));
-		if (SDK_INT >= 21) {
-			b.setCategory(CATEGORY_SERVICE);
-			b.setVisibility(VISIBILITY_SECRET);
-		}
-		b.setPriority(PRIORITY_MIN);
-		startForeground(ONGOING_NOTIFICATION_ID, b.build());
 		// Start the services in a background thread
 		new Thread(() -> {
 			StartResult result = lifecycleManager.startServices(dbKey);

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

@@ -40,4 +40,9 @@ public interface TestingConstants {
 	 * Feature flag for enabling the sign-in reminder in release builds.
 	 */
 	boolean FEATURE_FLAG_SIGN_IN_REMINDER = IS_DEBUG_BUILD;
+
+	/**
+	 * Feature flag for enabling the PIN lock in release builds.
+	 */
+	boolean FEATURE_FLAG_PIN_LOCK = IS_DEBUG_BUILD;
 }

briar-android/src/main/java/org/briarproject/briar/android/account/LockManagerImpl.java

@@ -0,0 +1,132 @@
+package org.briarproject.briar.android.account;
+
+import android.app.Application;
+import android.arch.lifecycle.LiveData;
+import android.arch.lifecycle.MutableLiveData;
+import android.content.Context;
+import android.support.annotation.UiThread;
+
+import org.briarproject.bramble.api.db.DatabaseExecutor;
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.event.Event;
+import org.briarproject.bramble.api.event.EventListener;
+import org.briarproject.bramble.api.lifecycle.Service;
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.bramble.api.settings.Settings;
+import org.briarproject.bramble.api.settings.SettingsManager;
+import org.briarproject.bramble.api.settings.event.SettingsUpdatedEvent;
+import org.briarproject.briar.api.android.AndroidNotificationManager;
+import org.briarproject.briar.api.android.LockManager;
+
+import java.util.concurrent.Executor;
+import java.util.logging.Logger;
+
+import javax.annotation.concurrent.ThreadSafe;
+import javax.inject.Inject;
+
+import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
+import static org.briarproject.briar.android.settings.SettingsFragment.PREF_SCREEN_LOCK;
+import static org.briarproject.briar.android.settings.SettingsFragment.SETTINGS_NAMESPACE;
+import static org.briarproject.briar.android.util.UiUtils.hasScreenLock;
+
+@ThreadSafe
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class LockManagerImpl implements LockManager, Service, EventListener {
+
+	private static final Logger LOG =
+			Logger.getLogger(LockManagerImpl.class.getName());
+
+	private final Context appContext;
+	private final SettingsManager settingsManager;
+	private final AndroidNotificationManager notificationManager;
+	@DatabaseExecutor
+	private final Executor dbExecutor;
+
+	private volatile boolean locked = false;
+	private volatile boolean lockableSetting = false;
+	private final MutableLiveData<Boolean> lockable = new MutableLiveData<>();
+
+	@Inject
+	public LockManagerImpl(Application app, SettingsManager settingsManager,
+			AndroidNotificationManager notificationManager,
+			@DatabaseExecutor Executor dbExecutor) {
+		this.appContext = app.getApplicationContext();
+		this.settingsManager = settingsManager;
+		this.notificationManager = notificationManager;
+		this.dbExecutor = dbExecutor;
+
+		// setting this in the constructor makes #getValue() @NonNull
+		this.lockable.setValue(false);
+	}
+
+	@Override
+	public void startService() {
+		// only load the setting here, because database isn't open before
+		loadLockableSetting();
+	}
+
+	@Override
+	public void stopService() {
+	}
+
+	@Override
+	public LiveData<Boolean> isLockable() {
+		return lockable;
+	}
+
+	@UiThread
+	@Override
+	public void checkIfLockable() {
+		boolean oldValue = lockable.getValue();
+		boolean newValue = hasScreenLock(appContext) && lockableSetting;
+		if (oldValue != newValue) {
+			this.lockable.setValue(newValue);
+		}
+	}
+
+	@Override
+	public boolean isLocked() {
+		if (locked && !hasScreenLock(appContext)) {
+			lockable.postValue(false);
+			locked = false;
+		}
+		return locked;
+	}
+
+	@Override
+	public void setLocked(boolean locked) {
+		this.locked = locked;
+		notificationManager.updateForegroundNotification(locked);
+	}
+
+	@Override
+	public void eventOccurred(Event event) {
+		if (event instanceof SettingsUpdatedEvent) {
+			SettingsUpdatedEvent e = (SettingsUpdatedEvent) event;
+			String namespace = e.getNamespace();
+			if (namespace.equals(SETTINGS_NAMESPACE)) {
+				loadLockableSetting();
+			}
+		}
+	}
+
+	private void loadLockableSetting() {
+		dbExecutor.execute(() -> {
+			try {
+				Settings settings =
+						settingsManager.getSettings(SETTINGS_NAMESPACE);
+				lockableSetting = settings.getBoolean(PREF_SCREEN_LOCK, false);
+				boolean newValue = hasScreenLock(appContext) && lockableSetting;
+				lockable.postValue(newValue);
+			} catch (DbException e) {
+				logException(LOG, WARNING, e);
+				lockableSetting = false;
+				lockable.postValue(false);
+			}
+		});
+	}
+
+}

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

@@ -37,6 +37,7 @@ import org.briarproject.briar.android.login.OpenDatabaseActivity;
 import org.briarproject.briar.android.login.PasswordActivity;
 import org.briarproject.briar.android.login.PasswordFragment;
 import org.briarproject.briar.android.login.SetupActivity;
+import org.briarproject.briar.android.login.UnlockActivity;
 import org.briarproject.briar.android.navdrawer.NavDrawerActivity;
 import org.briarproject.briar.android.panic.PanicPreferencesActivity;
 import org.briarproject.briar.android.panic.PanicResponderActivity;
@@ -163,6 +164,8 @@ public interface ActivityComponent {
 
 	void inject(StartupFailureActivity activity);
 
+	void inject(UnlockActivity activity);
+
 	// Fragments
 	void inject(AuthorNameFragment fragment);
 

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

@@ -16,7 +16,9 @@ import org.briarproject.briar.android.controller.BriarController;
 import org.briarproject.briar.android.controller.DbController;
 import org.briarproject.briar.android.controller.handler.UiResultHandler;
 import org.briarproject.briar.android.login.PasswordActivity;
+import org.briarproject.briar.android.login.UnlockActivity;
 import org.briarproject.briar.android.logout.ExitActivity;
+import org.briarproject.briar.api.android.LockManager;
 
 import java.util.logging.Logger;
 
@@ -30,6 +32,7 @@ import static android.content.Intent.FLAG_ACTIVITY_NO_ANIMATION;
 import static android.os.Build.VERSION.SDK_INT;
 import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_DOZE_WHITELISTING;
 import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_PASSWORD;
+import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_UNLOCK;
 import static org.briarproject.briar.android.util.UiUtils.getDozeWhitelistingIntent;
 import static org.briarproject.briar.android.util.UiUtils.isSamsung7;
 
@@ -44,26 +47,43 @@ public abstract class BriarActivity extends BaseActivity {
 
 	@Inject
 	BriarController briarController;
-
 	@Deprecated
 	@Inject
 	DbController dbController;
+	@Inject
+	protected LockManager lockManager;
 
 	@Override
 	protected void onActivityResult(int request, int result, Intent data) {
 		super.onActivityResult(request, result, data);
-		if (request == REQUEST_PASSWORD) {
+		if (request == REQUEST_PASSWORD && result == RESULT_OK) {
-			if (result == RESULT_OK) briarController.startAndBindService();
+			// PasswordActivity finishes when password was entered correctly.
-			else supportFinishAfterTransition();
+			// When back button is pressed there, it will bring itself back,
+			// so that we never arrive here with a result that is not OK.
+			briarController.startAndBindService();
+		} else if (request == REQUEST_UNLOCK && result != RESULT_OK) {
+			// We arrive here, if the user presses 'back'
+			// in the Keyguard unlock screen, because UnlockActivity finishes.
+			// If we don't finish here, isFinishing will be false in onResume()
+			// and we launch a new UnlockActivity causing a loop.
+			supportFinishAfterTransition();
+			// If the result is OK, we don't need to do anything here
+			// and can resume normally.
 		}
 	}
 
 	@Override
-	public void onStart() {
+	public void onResume() {
-		super.onStart();
+		super.onResume();
-		if (!briarController.accountSignedIn() && !isFinishing()) {
+		if (!briarController.accountSignedIn()) {
 			Intent i = new Intent(this, PasswordActivity.class);
 			startActivityForResult(i, REQUEST_PASSWORD);
+		} else if (lockManager.isLocked() && !isFinishing()) {
+			// Also check that the activity isn't finishing already.
+			// This is possible if finishing in onActivityResult().
+			// Failure to do this check would cause an UnlockActivity loop.
+			Intent i = new Intent(this, UnlockActivity.class);
+			startActivityForResult(i, REQUEST_UNLOCK);
 		} else if (SDK_INT >= 23) {
 			briarController.hasDozed(new UiResultHandler<Boolean>(this) {
 				@Override

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

@@ -12,5 +12,7 @@ public interface RequestCodes {
 	int REQUEST_PERMISSION_CAMERA = 8;
 	int REQUEST_DOZE_WHITELISTING = 9;
 	int REQUEST_ENABLE_BLUETOOTH = 10;
+	int REQUEST_UNLOCK = 11;
+	int REQUEST_KEYGUARD_UNLOCK = 12;
 
 }

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

@@ -17,7 +17,7 @@ import org.briarproject.briar.android.activity.ActivityComponent;
 @ParametersNotNullByDefault
 public class ErrorFragment extends BaseFragment {
 
-	private static final String TAG = ErrorFragment.class.getSimpleName();
+	private static final String TAG = ErrorFragment.class.getName();
 
 	private static final String ERROR_MSG = "errorMessage";
 

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

@@ -1,6 +1,5 @@
 package org.briarproject.briar.android.login;
 
-import android.app.NotificationManager;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
@@ -20,22 +19,23 @@ import org.briarproject.briar.android.activity.BaseActivity;
 import org.briarproject.briar.android.controller.BriarController;
 import org.briarproject.briar.android.controller.handler.UiResultHandler;
 import org.briarproject.briar.android.util.UiUtils;
+import org.briarproject.briar.api.android.AndroidNotificationManager;
 
 import javax.inject.Inject;
 
-import static android.content.Intent.ACTION_MAIN;
-import static android.content.Intent.CATEGORY_HOME;
 import static android.content.Intent.FLAG_ACTIVITY_CLEAR_TASK;
 import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
 import static android.view.View.INVISIBLE;
 import static android.view.View.VISIBLE;
-import static org.briarproject.briar.api.android.AndroidNotificationManager.REMINDER_NOTIFICATION_ID;
 
 public class PasswordActivity extends BaseActivity {
 
 	@Inject
 	AccountManager accountManager;
 
+	@Inject
+	AndroidNotificationManager notificationManager;
+
 	@Inject
 	PasswordController passwordController;
 
@@ -95,10 +95,8 @@ public class PasswordActivity extends BaseActivity {
 			setResult(RESULT_OK);
 			finish();
 		} else {
-			// Remove sign-in reminder notification
+			notificationManager.blockSignInNotification();
-			NotificationManager nm = (NotificationManager)
+			notificationManager.clearSignInNotification();
-					getSystemService(NOTIFICATION_SERVICE);
-			nm.cancel(REMINDER_NOTIFICATION_ID);
 		}
 	}
 
@@ -109,10 +107,9 @@ public class PasswordActivity extends BaseActivity {
 
 	@Override
 	public void onBackPressed() {
-		// Show the home screen rather than another password prompt
+		// Move task and activity to the background instead of showing another
-		Intent intent = new Intent(ACTION_MAIN);
+		// password prompt. onActivityResult() won't be called in BriarActivity
-		intent.addCategory(CATEGORY_HOME);
+		moveTaskToBack(true);
-		startActivity(intent);
 	}
 
 	private void deleteAccount() {

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

@@ -1,43 +1,29 @@
 package org.briarproject.briar.android.login;
 
-import android.app.NotificationChannel;
-import android.app.NotificationManager;
-import android.app.PendingIntent;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.support.v4.app.NotificationCompat;
-import android.support.v4.content.ContextCompat;
 
 import org.briarproject.bramble.api.account.AccountManager;
-import org.briarproject.briar.R;
 import org.briarproject.briar.android.AndroidComponent;
 import org.briarproject.briar.android.BriarApplication;
-import org.briarproject.briar.android.navdrawer.NavDrawerActivity;
+import org.briarproject.briar.api.android.AndroidNotificationManager;
 
 import javax.inject.Inject;
 
-import static android.app.NotificationManager.IMPORTANCE_LOW;
-import static android.content.Context.NOTIFICATION_SERVICE;
 import static android.content.Intent.ACTION_BOOT_COMPLETED;
 import static android.content.Intent.ACTION_MY_PACKAGE_REPLACED;
-import static android.content.Intent.FLAG_ACTIVITY_CLEAR_TOP;
-import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
-import static android.os.Build.VERSION.SDK_INT;
-import static android.support.v4.app.NotificationCompat.PRIORITY_LOW;
-import static android.support.v4.app.NotificationCompat.VISIBILITY_SECRET;
 import static org.briarproject.briar.android.TestingConstants.FEATURE_FLAG_SIGN_IN_REMINDER;
 import static org.briarproject.briar.android.settings.SettingsFragment.NOTIFY_SIGN_IN;
-import static org.briarproject.briar.api.android.AndroidNotificationManager.REMINDER_CHANNEL_ID;
+import static org.briarproject.briar.api.android.AndroidNotificationManager.ACTION_DISMISS_REMINDER;
-import static org.briarproject.briar.api.android.AndroidNotificationManager.REMINDER_NOTIFICATION_ID;
 
 public class SignInReminderReceiver extends BroadcastReceiver {
 
-	public static final String DISMISS_REMINDER = "dismissReminder";
-
 	@Inject
 	AccountManager accountManager;
+	@Inject
+	AndroidNotificationManager notificationManager;
 
 	@Override
 	public void onReceive(Context ctx, Intent intent) {
@@ -55,58 +41,12 @@ public class SignInReminderReceiver extends BroadcastReceiver {
 					!accountManager.hasDatabaseKey()) {
 				SharedPreferences prefs = app.getDefaultSharedPreferences();
 				if (prefs.getBoolean(NOTIFY_SIGN_IN, true)) {
-					showSignInNotification(ctx);
+					notificationManager.showSignInNotification();
 				}
 			}
-		} else if (action.equals(DISMISS_REMINDER)) {
+		} else if (action.equals(ACTION_DISMISS_REMINDER)) {
-			dismissReminder(ctx);
+			notificationManager.clearSignInNotification();
 		}
 	}
 
-	private void showSignInNotification(Context ctx) {
-		NotificationManager nm = (NotificationManager)
-				ctx.getSystemService(NOTIFICATION_SERVICE);
-		if (nm == null) return;
-
-		if (SDK_INT >= 26) {
-			NotificationChannel channel =
-					new NotificationChannel(REMINDER_CHANNEL_ID, ctx.getString(
-							R.string.reminder_notification_channel_title),
-							IMPORTANCE_LOW);
-			channel.setLockscreenVisibility(VISIBILITY_SECRET);
-			nm.createNotificationChannel(channel);
-		}
-
-		NotificationCompat.Builder b =
-				new NotificationCompat.Builder(ctx, REMINDER_CHANNEL_ID);
-		b.setSmallIcon(R.drawable.ic_signout);
-		b.setColor(ContextCompat.getColor(ctx, R.color.briar_primary));
-		b.setContentTitle(ctx.getText(R.string.reminder_notification_title));
-		b.setContentText(ctx.getText(R.string.reminder_notification_text));
-		b.setAutoCancel(true);
-		b.setWhen(0); // Don't show the time
-		b.setPriority(PRIORITY_LOW);
-
-		// Add a 'Dismiss' action
-		String actionTitle =
-				ctx.getString(R.string.reminder_notification_dismiss);
-		Intent i1 = new Intent(ctx, SignInReminderReceiver.class);
-		i1.setAction(DISMISS_REMINDER);
-		PendingIntent actionIntent = PendingIntent.getBroadcast(ctx, 0, i1, 0);
-		b.addAction(0, actionTitle, actionIntent);
-
-		Intent i = new Intent(ctx, NavDrawerActivity.class);
-		i.setFlags(FLAG_ACTIVITY_NEW_TASK | FLAG_ACTIVITY_CLEAR_TOP);
-		b.setContentIntent(PendingIntent.getActivity(ctx, 0, i, 0));
-
-		nm.notify(REMINDER_NOTIFICATION_ID, b.build());
-	}
-
-	private void dismissReminder(Context ctx) {
-		NotificationManager nm = (NotificationManager)
-				ctx.getSystemService(NOTIFICATION_SERVICE);
-		if (nm == null) return;
-		nm.cancel(REMINDER_NOTIFICATION_ID);
-	}
-
 }

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

@@ -0,0 +1,123 @@
+package org.briarproject.briar.android.login;
+
+import android.app.KeyguardManager;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.annotation.RequiresApi;
+import android.widget.Button;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.activity.BaseActivity;
+import org.briarproject.briar.api.android.LockManager;
+
+import java.util.logging.Logger;
+
+import javax.inject.Inject;
+
+import static android.os.Build.VERSION.SDK_INT;
+import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_KEYGUARD_UNLOCK;
+
+@RequiresApi(21)
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class UnlockActivity extends BaseActivity {
+
+	private static final Logger LOG =
+			Logger.getLogger(UnlockActivity.class.getName());
+	private static final String KEYGUARD_SHOWN = "keyguardShown";
+
+	@Inject
+	LockManager lockManager;
+
+	private boolean keyguardShown = false;
+
+	@Override
+	public void injectActivity(ActivityComponent component) {
+		component.inject(this);
+	}
+
+	public void onCreate(@Nullable Bundle state) {
+		super.onCreate(state);
+		overridePendingTransition(0, 0);
+		setContentView(R.layout.activity_unlock);
+
+		Button button = findViewById(R.id.unlock);
+		button.setOnClickListener(view -> requestKeyguardUnlock());
+
+		keyguardShown = state != null && state.getBoolean(KEYGUARD_SHOWN);
+	}
+
+	@Override
+	protected void onSaveInstanceState(Bundle outState) {
+		super.onSaveInstanceState(outState);
+		// Saving whether we've shown the keyguard already is necessary
+		// for Android 6 when this activity gets destroyed.
+		//
+		// This will not help Android 5.
+		// There the system will show the keyguard once again.
+		// So if this activity was destroyed, the user needs to enter PIN twice.
+		outState.putBoolean(KEYGUARD_SHOWN, keyguardShown);
+	}
+
+	@Override
+	protected void onActivityResult(int requestCode, int resultCode,
+			Intent data) {
+		super.onActivityResult(requestCode, resultCode, data);
+		if (requestCode == REQUEST_KEYGUARD_UNLOCK) {
+			if (resultCode == RESULT_OK) unlock();
+			else {
+				finish();
+				overridePendingTransition(0, 0);
+			}
+		}
+	}
+
+	@Override
+	protected void onResume() {
+		super.onResume();
+		// Show keyguard after onActivityResult() as been called.
+		// Check if app is still locked, lockable
+		// and not finishing (which is possible if recreated)
+		if (!keyguardShown && lockManager.isLocked() && !isFinishing()) {
+			requestKeyguardUnlock();
+		} else if (!lockManager.isLocked()) {
+			setResult(RESULT_OK);
+			finish();
+		}
+	}
+
+	@Override
+	public void onBackPressed() {
+		moveTaskToBack(true);
+	}
+
+	private void requestKeyguardUnlock() {
+		KeyguardManager keyguardManager =
+				(KeyguardManager) getSystemService(KEYGUARD_SERVICE);
+		if (keyguardManager == null) throw new AssertionError();
+		Intent intent = keyguardManager.createConfirmDeviceCredentialIntent(
+				SDK_INT < 23 ? getString(R.string.lock_unlock_verbose) :
+						getString(R.string.lock_unlock), null);
+		if (intent == null) {
+			// the user must have removed the screen lock since locked
+			LOG.warning("Unlocking without keyguard");
+			unlock();
+		} else {
+			keyguardShown = true;
+			startActivityForResult(intent, REQUEST_KEYGUARD_UNLOCK);
+			overridePendingTransition(0, 0);
+		}
+	}
+
+	private void unlock() {
+		lockManager.setLocked(false);
+		setResult(RESULT_OK);
+		finish();
+		overridePendingTransition(0, 0);
+	}
+
+}

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

@@ -7,6 +7,7 @@ import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.design.widget.NavigationView;
 import android.support.design.widget.NavigationView.OnNavigationItemSelectedListener;
+import android.support.v4.app.ActivityCompat;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentTransaction;
 import android.support.v4.content.ContextCompat;
@@ -136,6 +137,8 @@ public class NavDrawerActivity extends BriarActivity implements
 		initializeTransports(getLayoutInflater());
 		transportsView.setAdapter(transportsAdapter);
 
+		lockManager.isLockable().observe(this, this::setLockVisible);
+
 		if (lifecycleManager.getLifecycleState().isAfter(RUNNING)) {
 			showSignOutFragment();
 		} else if (state == null) {
@@ -152,6 +155,7 @@ public class NavDrawerActivity extends BriarActivity implements
 	public void onStart() {
 		super.onStart();
 		updateTransports();
+		lockManager.checkIfLockable();
 		controller.showExpiryWarning(new UiResultHandler<ExpiryWarning>(this) {
 			@Override
 			public void onResultUi(ExpiryWarning expiry) {
@@ -213,9 +217,15 @@ public class NavDrawerActivity extends BriarActivity implements
 	public boolean onNavigationItemSelected(@NonNull MenuItem item) {
 		drawerLayout.closeDrawer(START);
 		clearBackStack();
-		loadFragment(item.getItemId());
+		if (item.getItemId() == R.id.nav_btn_lock) {
-		// Don't display the Settings item as checked
+			lockManager.setLocked(true);
-		return item.getItemId() != R.id.nav_btn_settings;
+			ActivityCompat.finishAfterTransition(this);
+			return false;
+		} else {
+			loadFragment(item.getItemId());
+			// Don't display the Settings item as checked
+			return item.getItemId() != R.id.nav_btn_settings;
+		}
 	}
 
 	@Override
@@ -301,6 +311,11 @@ public class NavDrawerActivity extends BriarActivity implements
 		// Do nothing for now
 	}
 
+	private void setLockVisible(boolean visible) {
+		MenuItem item = navigation.getMenu().findItem(R.id.nav_btn_lock);
+		if (item != null) item.setVisible(visible);
+	}
+
 	@SuppressWarnings("ConstantConditions")
 	private void showExpiryWarning(ExpiryWarning expiry) {
 		int daysUntilExpiry = getDaysUntilExpiry();

briar-android/src/main/java/org/briarproject/briar/android/panic/PanicPreferencesFragment.java

@@ -9,8 +9,8 @@ import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.net.Uri;
 import android.os.Bundle;
+import android.support.v14.preference.SwitchPreference;
 import android.support.v7.app.AlertDialog;
-import android.support.v7.preference.CheckBoxPreference;
 import android.support.v7.preference.ListPreference;
 import android.support.v7.preference.PreferenceFragmentCompat;
 import android.text.TextUtils;
@@ -37,7 +37,7 @@ public class PanicPreferencesFragment extends PreferenceFragmentCompat
 			Logger.getLogger(PanicPreferencesFragment.class.getName());
 
 	private PackageManager pm;
-	private CheckBoxPreference lockPref, purgePref, uninstallPref;
+	private SwitchPreference lockPref, purgePref, uninstallPref;
 	private ListPreference panicAppPref;
 
 	@Override
@@ -46,10 +46,10 @@ public class PanicPreferencesFragment extends PreferenceFragmentCompat
 
 		pm = getActivity().getPackageManager();
 
-		lockPref = (CheckBoxPreference) findPreference(KEY_LOCK);
+		lockPref = (SwitchPreference) findPreference(KEY_LOCK);
 		panicAppPref = (ListPreference) findPreference(KEY_PANIC_APP);
-		purgePref = (CheckBoxPreference) findPreference(KEY_PURGE);
+		purgePref = (SwitchPreference) findPreference(KEY_PURGE);
-		uninstallPref = (CheckBoxPreference) findPreference(KEY_UNINSTALL);
+		uninstallPref = (SwitchPreference) findPreference(KEY_UNINSTALL);
 
 		// check for connect/disconnect intents from panic trigger apps
 		if (PanicResponder.checkForDisconnectIntent(getActivity())) {

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

@@ -10,9 +10,9 @@ import android.media.RingtoneManager;
 import android.net.Uri;
 import android.os.Bundle;
 import android.support.annotation.StringRes;
+import android.support.v14.preference.SwitchPreference;
 import android.support.v4.content.ContextCompat;
 import android.support.v4.text.TextUtilsCompat;
-import android.support.v7.preference.CheckBoxPreference;
 import android.support.v7.preference.ListPreference;
 import android.support.v7.preference.Preference;
 import android.support.v7.preference.PreferenceFragmentCompat;
@@ -82,10 +82,12 @@ import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.LogUtils.now;
 import static org.briarproject.bramble.util.StringUtils.join;
 import static org.briarproject.briar.android.TestingConstants.FEATURE_FLAG_DARK_THEME;
+import static org.briarproject.briar.android.TestingConstants.FEATURE_FLAG_PIN_LOCK;
 import static org.briarproject.briar.android.TestingConstants.FEATURE_FLAG_SIGN_IN_REMINDER;
 import static org.briarproject.briar.android.TestingConstants.IS_DEBUG_BUILD;
 import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_RINGTONE;
 import static org.briarproject.briar.android.navdrawer.NavDrawerActivity.INTENT_SIGN_OUT;
+import static org.briarproject.briar.android.util.UiUtils.hasScreenLock;
 import static org.briarproject.briar.api.android.AndroidNotificationManager.BLOG_CHANNEL_ID;
 import static org.briarproject.briar.api.android.AndroidNotificationManager.CONTACT_CHANNEL_ID;
 import static org.briarproject.briar.api.android.AndroidNotificationManager.FORUM_CHANNEL_ID;
@@ -109,6 +111,7 @@ public class SettingsFragment extends PreferenceFragmentCompat
 	public static final String BT_NAMESPACE = BluetoothConstants.ID.getString();
 	public static final String TOR_NAMESPACE = TorConstants.ID.getString();
 	public static final String LANGUAGE = "pref_key_language";
+	public static final String PREF_SCREEN_LOCK = "pref_key_lock";
 	public static final String NOTIFY_SIGN_IN = "pref_key_notify_sign_in";
 	public static final String TOR_LOCATION = "pref_key_tor_location";
 
@@ -119,14 +122,14 @@ public class SettingsFragment extends PreferenceFragmentCompat
 	private ListPreference language;
 	private ListPreference enableBluetooth;
 	private ListPreference torNetwork;
-	private CheckBoxPreference torBlocked;
+	private SwitchPreference torBlocked;
-	private CheckBoxPreference notifyPrivateMessages;
+	private SwitchPreference screenLock;
-	private CheckBoxPreference notifyGroupMessages;
+	private SwitchPreference notifyPrivateMessages;
-	private CheckBoxPreference notifyForumPosts;
+	private SwitchPreference notifyGroupMessages;
-	private CheckBoxPreference notifyBlogPosts;
+	private SwitchPreference notifyForumPosts;
-	private CheckBoxPreference notifyVibration;
+	private SwitchPreference notifyBlogPosts;
-	private CheckBoxPreference notifyLockscreen;
+	private SwitchPreference notifyVibration;
-
+	private SwitchPreference notifyLockscreen;
 	private Preference notifySound;
 
 	// Fields that are accessed from background threads must be volatile
@@ -158,26 +161,25 @@ public class SettingsFragment extends PreferenceFragmentCompat
 				(ListPreference) findPreference("pref_key_theme");
 		enableBluetooth = (ListPreference) findPreference("pref_key_bluetooth");
 		torNetwork = (ListPreference) findPreference("pref_key_tor_network");
-		torBlocked = (CheckBoxPreference) findPreference(TOR_LOCATION);
+		torBlocked = (SwitchPreference) findPreference(TOR_LOCATION);
 		setBlockedCountries();
-		CheckBoxPreference notifySignIn =
+		SwitchPreference notifySignIn =
-				(CheckBoxPreference) findPreference(NOTIFY_SIGN_IN);
+				(SwitchPreference) findPreference(NOTIFY_SIGN_IN);
-		notifyPrivateMessages = (CheckBoxPreference) findPreference(
+		screenLock = (SwitchPreference) findPreference(PREF_SCREEN_LOCK);
+		notifyPrivateMessages = (SwitchPreference) findPreference(
 				"pref_key_notify_private_messages");
-		notifyGroupMessages = (CheckBoxPreference) findPreference(
+		notifyGroupMessages = (SwitchPreference) findPreference(
 				"pref_key_notify_group_messages");
-		notifyForumPosts = (CheckBoxPreference) findPreference(
+		notifyForumPosts = (SwitchPreference) findPreference(
 				"pref_key_notify_forum_posts");
-		notifyBlogPosts = (CheckBoxPreference) findPreference(
+		notifyBlogPosts = (SwitchPreference) findPreference(
 				"pref_key_notify_blog_posts");
-		notifyVibration = (CheckBoxPreference) findPreference(
+		notifyVibration = (SwitchPreference) findPreference(
 				"pref_key_notify_vibration");
-		notifyLockscreen = (CheckBoxPreference) findPreference(
+		notifyLockscreen = (SwitchPreference) findPreference(
 				"pref_key_notify_lock_screen");
 		notifySound = findPreference("pref_key_notify_sound");
 
-		setSettingsEnabled(false);
-
 		language.setOnPreferenceChangeListener(this);
 		theme.setOnPreferenceChangeListener((preference, newValue) -> {
 			if (getActivity() != null) {
@@ -200,6 +202,7 @@ public class SettingsFragment extends PreferenceFragmentCompat
 		enableBluetooth.setOnPreferenceChangeListener(this);
 		torNetwork.setOnPreferenceChangeListener(this);
 		torBlocked.setOnPreferenceChangeListener(this);
+		screenLock.setOnPreferenceChangeListener(this);
 		if (SDK_INT >= 21) {
 			notifyLockscreen.setVisible(true);
 			notifyLockscreen.setOnPreferenceChangeListener(this);
@@ -220,6 +223,7 @@ public class SettingsFragment extends PreferenceFragmentCompat
 		} else {
 			theme.setVisible(FEATURE_FLAG_DARK_THEME);
 			notifySignIn.setVisible(FEATURE_FLAG_SIGN_IN_REMINDER);
+			screenLock.setVisible(FEATURE_FLAG_PIN_LOCK);
 
 			findPreference("pref_key_explode").setVisible(false);
 			findPreference("pref_key_test_data").setVisible(false);
@@ -229,7 +233,6 @@ public class SettingsFragment extends PreferenceFragmentCompat
 			testing.setVisible(false);
 		}
 
-		loadSettings();
 	}
 
 	@Override
@@ -246,6 +249,8 @@ public class SettingsFragment extends PreferenceFragmentCompat
 	public void onStart() {
 		super.onStart();
 		eventBus.addListener(this);
+		setSettingsEnabled(false);
+		loadSettings();
 	}
 
 	@Override
@@ -300,8 +305,26 @@ public class SettingsFragment extends PreferenceFragmentCompat
 	}
 
 	private void setBlockedCountries() {
-		List<String> countries = new ArrayList<>(asList(BLOCKED));
+		List<String> countryCodes = new ArrayList<>(asList(BLOCKED));
-		countries.removeAll(asList(BRIDGES));
+		countryCodes.removeAll(asList(BRIDGES));
+		// Look up country names in the user's chosen language if available
+		Locale[] locales = Locale.getAvailableLocales();
+		List<String> countries = new ArrayList<>(countryCodes.size());
+		for (String countryCode : countryCodes) {
+			boolean found = false;
+			for (Locale locale : locales) {
+				if (locale.getCountry().equalsIgnoreCase(countryCode)) {
+					countries.add(locale.getDisplayCountry());
+					found = true;
+					break;
+				}
+			}
+			if (!found) {
+				if (LOG.isLoggable(INFO))
+					LOG.info("No locale for " + countryCode);
+				countries.add(countryCode);
+			}
+		}
 		Collections.sort(countries);
 		String format = getString(R.string.tor_location_setting_hint_format);
 		torBlocked.setSummary(String.format(format, join(countries, ", ")));
@@ -336,6 +359,7 @@ public class SettingsFragment extends PreferenceFragmentCompat
 			enableBluetooth.setValue(Boolean.toString(btSetting));
 			torNetwork.setValue(Integer.toString(torNetworkSetting));
 			torBlocked.setChecked(torBlockedSetting);
+			displayScreenLockSetting();
 
 			if (SDK_INT < 26) {
 				notifyPrivateMessages.setChecked(settings.getBoolean(
@@ -393,9 +417,12 @@ public class SettingsFragment extends PreferenceFragmentCompat
 		// preferences not needed here, because handled by SharedPreferences:
 		// - pref_key_theme
 		// - pref_key_notify_sign_in
+		// preferences partly needed here, because they have their own logic
+		// - pref_key_lock (screenLock -> displayScreenLockSetting())
 		enableBluetooth.setEnabled(enabled);
 		torNetwork.setEnabled(enabled);
 		torBlocked.setEnabled(enabled);
+		if (!enabled) screenLock.setEnabled(false);
 		notifyPrivateMessages.setEnabled(enabled);
 		notifyGroupMessages.setEnabled(enabled);
 		notifyForumPosts.setEnabled(enabled);
@@ -405,8 +432,25 @@ public class SettingsFragment extends PreferenceFragmentCompat
 		notifySound.setEnabled(enabled);
 	}
 
+	private void displayScreenLockSetting() {
+		if (SDK_INT < 21) {
+			screenLock.setVisible(false);
+		} else {
+			if (getActivity() != null && hasScreenLock(getActivity())) {
+				screenLock.setEnabled(true);
+				screenLock.setChecked(
+						settings.getBoolean(PREF_SCREEN_LOCK, false));
+				screenLock.setSummary(R.string.pref_lock_summary);
+			} else {
+				screenLock.setEnabled(false);
+				screenLock.setChecked(false);
+				screenLock.setSummary(R.string.pref_lock_disabled_summary);
+			}
+		}
+	}
+
 	@TargetApi(26)
-	private void setupNotificationPreference(CheckBoxPreference pref,
+	private void setupNotificationPreference(SwitchPreference pref,
 			String channelId, @StringRes int summary) {
 		pref.setWidgetLayoutResource(0);
 		pref.setSummary(summary);
@@ -460,6 +504,10 @@ public class SettingsFragment extends PreferenceFragmentCompat
 		} else if (preference == torBlocked) {
 			boolean torBlockedSetting = (Boolean) newValue;
 			storeTorBlockedSetting(torBlockedSetting);
+		} else if (preference == screenLock) {
+			Settings s = new Settings();
+			s.putBoolean(PREF_SCREEN_LOCK, (Boolean) newValue);
+			storeSettings(s);
 		} else if (preference == notifyPrivateMessages) {
 			Settings s = new Settings();
 			s.putBoolean(PREF_NOTIFY_PRIVATE, (Boolean) newValue);

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

@@ -14,6 +14,8 @@ import org.briarproject.briar.android.activity.ActivityComponent;
 import org.briarproject.briar.android.activity.BaseActivity;
 import org.briarproject.briar.android.login.OpenDatabaseActivity;
 import org.briarproject.briar.android.login.SetupActivity;
+import org.briarproject.briar.android.navdrawer.NavDrawerActivity;
+import org.briarproject.briar.api.android.LockManager;
 
 import java.util.logging.Logger;
 
@@ -29,6 +31,8 @@ public class SplashScreenActivity extends BaseActivity {
 	@Inject
 	protected AccountManager accountManager;
 	@Inject
+	protected LockManager lockManager;
+	@Inject
 	protected AndroidExecutor androidExecutor;
 
 	@Override
@@ -44,7 +48,16 @@ public class SplashScreenActivity extends BaseActivity {
 		setContentView(R.layout.splash);
 
 		if (accountManager.hasDatabaseKey()) {
-			startActivity(new Intent(this, OpenDatabaseActivity.class));
+			Intent i;
+			if (lockManager.isLocked()) {
+				// The database needs to be opened for the app to be locked.
+				// Start main activity right away. It will open UnlockActivity.
+				// Otherwise, we would end up with two screen unlock inputs.
+				i = new Intent(this, NavDrawerActivity.class);
+			} else {
+				i = new Intent(this, OpenDatabaseActivity.class);
+			}
+			startActivity(i);
 			finish();
 		} else {
 			new Handler().postDelayed(() -> {

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

@@ -2,6 +2,7 @@ package org.briarproject.briar.android.util;
 
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
+import android.app.KeyguardManager;
 import android.content.Context;
 import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
@@ -36,6 +37,7 @@ import org.briarproject.briar.android.widget.LinkDialogFragment;
 
 import javax.annotation.Nullable;
 
+import static android.content.Context.KEYGUARD_SERVICE;
 import static android.content.Context.POWER_SERVICE;
 import static android.content.Intent.CATEGORY_DEFAULT;
 import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
@@ -229,4 +231,15 @@ public class UiUtils {
 		return ContextCompat.getColor(ctx, color);
 	}
 
+	public static boolean hasScreenLock(Context ctx) {
+		if (SDK_INT < 21) return false;
+		KeyguardManager keyguardManager =
+				(KeyguardManager) ctx.getSystemService(KEYGUARD_SERVICE);
+		if (keyguardManager == null) return false;
+		// check if there's a lock mechanism we can use
+		// first one is true if SIM card is locked, so use second if available
+		return (SDK_INT < 23 && keyguardManager.isKeyguardSecure()) ||
+				(SDK_INT >= 23 && keyguardManager.isDeviceSecure());
+	}
+
 }

briar-android/src/main/java/org/briarproject/briar/api/android/AndroidNotificationManager.java

@@ -1,5 +1,7 @@
 package org.briarproject.briar.api.android;
 
+import android.app.Notification;
+
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.sync.GroupId;
 
@@ -49,6 +51,13 @@ public interface AndroidNotificationManager {
 	String BLOG_URI = "content://org.briarproject.briar/blog";
 	String INTRODUCTION_URI = "content://org.briarproject.briar/introduction";
 
+	// Actions for pending intents
+	String ACTION_DISMISS_REMINDER = "dismissReminder";
+
+	Notification getForegroundNotification();
+
+	void updateForegroundNotification(boolean locked);
+
 	void clearContactNotification(ContactId c);
 
 	void clearAllContactNotifications();
@@ -67,6 +76,12 @@ public interface AndroidNotificationManager {
 
 	void clearAllIntroductionNotifications();
 
+	void showSignInNotification();
+
+	void clearSignInNotification();
+
+	void blockSignInNotification();
+
 	void blockContactNotification(ContactId c);
 
 	void unblockContactNotification(ContactId c);

briar-android/src/main/java/org/briarproject/briar/api/android/LockManager.java

@@ -0,0 +1,33 @@
+package org.briarproject.briar.api.android;
+
+import android.arch.lifecycle.LiveData;
+import android.support.annotation.UiThread;
+
+public interface LockManager {
+
+	/**
+	 * Returns an observable LiveData to indicate whether the app can be locked.
+	 */
+	LiveData<Boolean> isLockable();
+
+	/**
+	 * Updates the LiveData returned by {@link #isLockable()}.
+	 * It checks whether a device screen lock is available and
+	 * whether the app setting is checked.
+	 */
+	@UiThread
+	void checkIfLockable();
+
+	/**
+	 * Returns true if app is currently locked, false otherwise.
+	 * If the device's screen lock was removed while the app was locked,
+	 * calling this will unlock the app automatically.
+	 */
+	boolean isLocked();
+
+	/**
+	 * Locks the app if true is passed, otherwise unlocks the app.
+	 */
+	void setLocked(boolean locked);
+
+}

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

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<shape
-	xmlns:android="http://schemas.android.com/apk/res/android"
-	android:shape="rectangle">
-	<corners
-		android:bottomLeftRadius="@dimen/message_bubble_radius_big"
-		android:bottomRightRadius="@dimen/message_bubble_radius_big"
-		android:topLeftRadius="@dimen/message_bubble_radius_small"
-		android:topRightRadius="@dimen/message_bubble_radius_big"/>
-	<padding
-		android:bottom="@dimen/message_bubble_padding_bottom"
-		android:left="@dimen/message_bubble_padding_sides"
-		android:right="@dimen/message_bubble_padding_sides"
-		android:top="@dimen/message_bubble_padding_top"/>
-	<solid
-		android:color="@color/msg_in"/>
-</shape>

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

@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<shape
-	xmlns:android="http://schemas.android.com/apk/res/android"
-	android:shape="rectangle">
-	<stroke android:width="1dp" android:color="@color/msg_border"/>
-	<corners
-		android:bottomLeftRadius="@dimen/message_bubble_radius_big"
-		android:bottomRightRadius="@dimen/message_bubble_radius_big"
-		android:topLeftRadius="@dimen/message_bubble_radius_small"
-		android:topRightRadius="@dimen/message_bubble_radius_big"/>
-</shape>

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

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<shape
-	xmlns:android="http://schemas.android.com/apk/res/android"
-	android:shape="rectangle">
-	<corners
-		android:bottomLeftRadius="0dp"
-		android:bottomRightRadius="0dp"
-		android:topLeftRadius="@dimen/message_bubble_radius_small"
-		android:topRightRadius="@dimen/message_bubble_radius_big"/>
-	<padding
-		android:bottom="@dimen/message_bubble_padding_top"
-		android:left="@dimen/message_bubble_padding_sides"
-		android:right="@dimen/message_bubble_padding_sides"
-		android:top="@dimen/message_bubble_padding_top"/>
-	<solid
-		android:color="@color/msg_in"/>
-</shape>

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

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<shape
-	xmlns:android="http://schemas.android.com/apk/res/android"
-	android:shape="rectangle">
-	<corners
-		android:bottomLeftRadius="@dimen/message_bubble_radius_big"
-		android:bottomRightRadius="@dimen/message_bubble_radius_big"
-		android:topLeftRadius="@dimen/message_bubble_radius_big"
-		android:topRightRadius="@dimen/message_bubble_radius_small"/>
-	<padding
-		android:bottom="@dimen/message_bubble_padding_bottom"
-		android:left="@dimen/message_bubble_padding_sides"
-		android:right="@dimen/message_bubble_padding_sides"
-		android:top="@dimen/message_bubble_padding_top"/>
-	<solid
-		android:color="@color/msg_out"/>
-</shape>

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

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<shape
-	xmlns:android="http://schemas.android.com/apk/res/android"
-	android:shape="rectangle">
-	<corners
-		android:bottomLeftRadius="0dp"
-		android:bottomRightRadius="0dp"
-		android:topLeftRadius="@dimen/message_bubble_radius_big"
-		android:topRightRadius="@dimen/message_bubble_radius_small"/>
-	<padding
-		android:bottom="@dimen/message_bubble_padding_top"
-		android:left="@dimen/message_bubble_padding_sides"
-		android:right="@dimen/message_bubble_padding_sides"
-		android:top="@dimen/message_bubble_padding_top"/>
-	<solid
-		android:color="@color/msg_out"/>
-</shape>

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

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<shape
-	xmlns:android="http://schemas.android.com/apk/res/android"
-	android:shape="rectangle">
-	<corners
-		android:bottomLeftRadius="@dimen/message_bubble_radius_big"
-		android:bottomRightRadius="@dimen/message_bubble_radius_big"
-		android:topLeftRadius="@dimen/message_bubble_radius_small"
-		android:topRightRadius="@dimen/message_bubble_radius_big"/>
-	<padding
-		android:bottom="@dimen/message_bubble_padding_bottom"
-		android:left="@dimen/message_bubble_padding_sides"
-		android:right="@dimen/message_bubble_padding_sides"
-		android:top="@dimen/message_bubble_padding_top"/>
-	<solid
-		android:color="@color/notice_in"/>
-</shape>

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

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<shape
-	xmlns:android="http://schemas.android.com/apk/res/android"
-	android:shape="rectangle">
-	<corners
-		android:bottomLeftRadius="@dimen/message_bubble_radius_big"
-		android:bottomRightRadius="@dimen/message_bubble_radius_big"
-		android:topLeftRadius="0dp"
-		android:topRightRadius="0dp"/>
-	<padding
-		android:bottom="@dimen/message_bubble_padding_bottom"
-		android:left="@dimen/message_bubble_padding_sides"
-		android:right="@dimen/message_bubble_padding_sides"
-		android:top="@dimen/message_bubble_padding_bottom"/>
-	<solid
-		android:color="@color/notice_in"/>
-</shape>

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

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<shape
-	xmlns:android="http://schemas.android.com/apk/res/android"
-	android:shape="rectangle">
-	<corners
-		android:bottomLeftRadius="@dimen/message_bubble_radius_big"
-		android:bottomRightRadius="@dimen/message_bubble_radius_big"
-		android:topLeftRadius="@dimen/message_bubble_radius_big"
-		android:topRightRadius="@dimen/message_bubble_radius_small"/>
-	<padding
-		android:bottom="@dimen/message_bubble_padding_bottom"
-		android:left="@dimen/message_bubble_padding_sides"
-		android:right="@dimen/message_bubble_padding_sides"
-		android:top="@dimen/message_bubble_padding_top"/>
-	<solid
-		android:color="@color/notice_out"/>
-</shape>

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

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<shape
-	xmlns:android="http://schemas.android.com/apk/res/android"
-	android:shape="rectangle">
-	<corners
-		android:bottomLeftRadius="@dimen/message_bubble_radius_big"
-		android:bottomRightRadius="@dimen/message_bubble_radius_big"
-		android:topLeftRadius="0dp"
-		android:topRightRadius="0dp"/>
-	<padding
-		android:bottom="@dimen/message_bubble_padding_bottom"
-		android:left="@dimen/message_bubble_padding_sides"
-		android:right="@dimen/message_bubble_padding_sides"
-		android:top="@dimen/message_bubble_padding_bottom"/>
-	<solid
-		android:color="@color/notice_out"/>
-</shape>

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

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:orientation="vertical"
+	tools:context=".android.login.UnlockActivity">
+
+	<android.support.v7.widget.AppCompatImageView
+		android:id="@+id/image"
+		android:layout_width="150dp"
+		android:layout_height="150dp"
+		android:layout_margin="@dimen/margin_large"
+		android:src="@drawable/splash_screen"
+		app:layout_constraintBottom_toTopOf="@+id/is_locked"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent"
+		app:layout_constraintVertical_chainStyle="spread"
+		app:tint="?attr/colorControlNormal"/>
+
+	<TextView
+		android:id="@+id/is_locked"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_margin="@dimen/margin_large"
+		android:gravity="center"
+		android:text="@string/lock_is_locked"
+		android:textSize="@dimen/text_size_xlarge"
+		app:layout_constraintBottom_toTopOf="@+id/unlock"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/image"
+		app:layout_constraintVertical_chainStyle="spread"/>
+
+	<Button
+		android:id="@+id/unlock"
+		style="@style/BriarButton"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_margin="@dimen/margin_large"
+		android:text="@string/lock_unlock"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"/>
+
+</android.support.constraint.ConstraintLayout>

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

@@ -5,12 +5,9 @@
 	xmlns:tools="http://schemas.android.com/tools"
 	android:layout_width="wrap_content"
 	android:layout_height="wrap_content"
-	android:layout_marginBottom="@dimen/message_bubble_margin"
 	android:layout_marginLeft="@dimen/message_bubble_margin_tail"
 	android:layout_marginRight="@dimen/message_bubble_margin_non_tail"
-	android:layout_marginTop="@dimen/message_bubble_margin"
 	android:background="@drawable/msg_in"
-	android:elevation="@dimen/message_bubble_elevation"
 	android:orientation="vertical">
 
 	<org.thoughtcrime.securesms.components.emoji.EmojiTextView
@@ -28,6 +25,7 @@
 		android:layout_height="wrap_content"
 		android:layout_gravity="right|end"
 		android:layout_marginTop="@dimen/message_bubble_timestamp_margin"
+		android:textColor="?android:attr/textColorSecondary"
 		tools:text="Dec 24, 13:37"/>
 
 </LinearLayout>