Move task to back rather than showing home screen.

Do not show sign-in reminder once PasswordActivity was opened

Closes #47

See merge request briar/briar!879

.gitignore

@@ -23,5 +23,6 @@ local.properties
 !.idea/codeStyles
 .gradle
 build/
+captures
 *.iml
 projectFilesBackup/

.gitlab-ci.yml

@@ -21,11 +21,7 @@ test:
 
 
 test_reproducible:
-  image: briar/reproducer:latest
-
   script:
-    - cd /opt/briar-reproducer
-    - ./reproduce.py ${CI_COMMIT_REF_NAME}
-
+    - "curl -X POST -F token=${RELEASE_CHECK_TOKEN} -F ref=master -F variables[RELEASE_TAG]=${CI_COMMIT_REF_NAME} https://code.briarproject.org/api/v4/projects/61/trigger/pipeline"
   only:
     - tags

.idea/runConfigurations/All_tests.xml

@@ -21,6 +21,7 @@
     <method>
       <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-api" run_configuration_type="AndroidJUnit" />
       <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-core" run_configuration_type="AndroidJUnit" />
+      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-android" run_configuration_type="AndroidJUnit" />
       <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-j2se" run_configuration_type="AndroidJUnit" />
       <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in briar-core" run_configuration_type="AndroidJUnit" />
     </method>

.idea/runConfigurations/All_tests_in_bramble_android.xml

@@ -0,0 +1,23 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="All tests in bramble-android" type="AndroidJUnit" factoryName="Android JUnit">
+    <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
+    <module name="bramble-android" />
+    <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
+    <option name="ALTERNATIVE_JRE_PATH" />
+    <option name="PACKAGE_NAME" value="" />
+    <option name="MAIN_CLASS_NAME" value="" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="package" />
+    <option name="VM_PARAMETERS" value="-ea" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-android" />
+    <option name="ENV_VARIABLES" />
+    <option name="PASS_PARENT_ENVS" value="true" />
+    <option name="TEST_SEARCH_SCOPE">
+      <value defaultName="singleModule" />
+    </option>
+    <envs />
+    <patterns />
+    <method />
+  </configuration>
+</component>

bramble-android/build.gradle

@@ -8,9 +8,11 @@ android {
 	defaultConfig {
 		minSdkVersion 14
 		targetSdkVersion 26
-		versionCode 10009
-		versionName "1.0.9"
+		versionCode 10013
+		versionName "1.0.13"
 		consumerProguardFiles 'proguard-rules.txt'
+
+		testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 	}
 
 	compileOptions {
@@ -26,41 +28,59 @@ configurations {
 dependencies {
 	implementation project(path: ':bramble-core', configuration: 'default')
 	implementation 'org.briarproject:jtorctl:0.3'
-	tor 'org.briarproject:tor-android:0.2.9.15@zip'
+	tor 'org.briarproject:tor-android:0.2.9.16@zip'
 
 	annotationProcessor 'com.google.dagger:dagger-compiler:2.0.2'
 
 	compileOnly 'javax.annotation:jsr250-api:1.0'
+
+	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
+	testImplementation 'junit:junit:4.12'
+	testImplementation "org.jmock:jmock:2.8.2"
+	testImplementation "org.jmock:jmock-junit4:2.8.2"
+	testImplementation "org.jmock:jmock-legacy:2.8.2"
+	testImplementation "org.hamcrest:hamcrest-library:1.3"
+	testImplementation "org.hamcrest:hamcrest-core:1.3"
+
+	androidTestImplementation project(path: ':bramble-api', configuration: 'testOutput')
+	androidTestImplementation project(path: ':bramble-core', configuration: 'testOutput')
+	androidTestImplementation 'com.android.support.test:runner:1.0.2'
+	androidTestAnnotationProcessor 'com.google.dagger:dagger-compiler:2.0.2'
+	androidTestCompileOnly 'javax.annotation:jsr250-api:1.0'
 }
 
 dependencyVerification {
 	verify = [
-			'com.android.tools.analytics-library:protos:26.1.2:protos-26.1.2.jar:52672a0b42b572a06aecc3535d5068eb46c0e15d129b9f1085d3c16a1da5cdbb',
-			'com.android.tools.analytics-library:shared:26.1.2:shared-26.1.2.jar:5c7e0eda18c6f87feeb83628c707e8aaa3298b41fb72e38efe31ad1675f9e8e9',
-			'com.android.tools.analytics-library:tracker:26.1.2:tracker-26.1.2.jar:06f97aa0adf44ffb06f8681c6a79d9be153a08f61d21eddc42b8d3db96df4282',
-			'com.android.tools.build:apksig:3.1.2:apksig-3.1.2.jar:40696a4559124d1d57873d208857eee059d48859239d569c7d18374ac644a8be',
-			'com.android.tools.build:builder-model:3.1.2:builder-model-3.1.2.jar:d49bfa2a135c9562b6ca7aa4342036cfa1582c7074c2d1d93d1dae8b3a134e17',
-			'com.android.tools.build:builder-test-api:3.1.2:builder-test-api-3.1.2.jar:dfe2a50b740d41b11189101062434d4283d18647e89a492ad51710c719363e9f',
-			'com.android.tools.build:builder:3.1.2:builder-3.1.2.jar:b60f825a42e2efe8433619fbc759f3d9effecab718279048d36881188ceb1d14',
-			'com.android.tools.build:gradle-api:3.1.2:gradle-api-3.1.2.jar:e58bcc5b893e4583ab0f5c8ef89c4dbcce202b405a9d7fcc116d21e5357d4893',
-			'com.android.tools.build:manifest-merger:26.1.2:manifest-merger-26.1.2.jar:9c61c27ea5266573107b954acf1216d398f4d7e7ae6fad6409d6b2b767eb091c',
-			'com.android.tools.ddms:ddmlib:26.1.2:ddmlib-26.1.2.jar:18a2a5fbef36882f07d03c2b9e59eba05cf8248177bf5cbff736e4b582804c44',
-			'com.android.tools.external.com-intellij:intellij-core:26.1.2:intellij-core-26.1.2.jar:37c5acf279f1ae3e85b1a5be3c9f15f43bde7b08f978eefefffb9c4035760c52',
-			'com.android.tools.external.com-intellij:kotlin-compiler:26.1.2:kotlin-compiler-26.1.2.jar:152df0bee7580326c77316b669a9d96e3b09efb1d45f545dce4147271b0b8944',
-			'com.android.tools.external.org-jetbrains:uast:26.1.2:uast-26.1.2.jar:02d39582206d3f5fc0a6cb18bfd9e8b9f9c1acb805ec6dac08b4e3a56849d279',
-			'com.android.tools.layoutlib:layoutlib-api:26.1.2:layoutlib-api-26.1.2.jar:20220039fcc7d799f928153beff862e704457c0f55ab44258f3745ebeb662b4f',
-			'com.android.tools.lint:lint-api:26.1.2:lint-api-26.1.2.jar:e1d5b62b870a7c566e9877a6b96b27784a4d713f8caa07fdcb4705d47a40a1d9',
-			'com.android.tools.lint:lint-checks:26.1.2:lint-checks-26.1.2.jar:211e2afd58504372385d71b1e5be982c2b5121ab6fee1c04ddabeb75a8729e07',
-			'com.android.tools.lint:lint-gradle-api:26.1.2:lint-gradle-api-26.1.2.jar:71284f2a8b03c3e55c94511c9eb36f8184fbb85324325fc6b78abf5183f03d90',
-			'com.android.tools.lint:lint-gradle:26.1.2:lint-gradle-26.1.2.jar:855f0c82b7fc690df1b7319c0774f7517f7f8f5dd4eee1f6077dcf50e07c6240',
-			'com.android.tools.lint:lint-kotlin:26.1.2:lint-kotlin-26.1.2.jar:1e591f70bcbbc11569720a9bbcca2bc1f3d4f789f01f40f642848d920643d484',
-			'com.android.tools.lint:lint:26.1.2:lint-26.1.2.jar:93736c62e9f1976998c2b4aa716aea0734cdb162d05502f4af7292654aedb182',
-			'com.android.tools:annotations:26.1.2:annotations-26.1.2.jar:72773dcaf5c4ccca828e3c8467f1b78a8a00b3cc5f8ad1aab88fcf9379928018',
-			'com.android.tools:common:26.1.2:common-26.1.2.jar:ea4320f0c17dcbc4491896bb705c4d25ec08bd62ef02ab0579fe154e75e788e6',
-			'com.android.tools:dvlib:26.1.2:dvlib-26.1.2.jar:1187aa4fb666595c96c4deb6bc0e0f4b7e396bde9f6243330b49a232946130ea',
-			'com.android.tools:repository:26.1.2:repository-26.1.2.jar:8b86e512ad6d32bd76989451eefe2b271f5efce6d4d65ecb173afaf14606e01a',
-			'com.android.tools:sdk-common:26.1.2:sdk-common-26.1.2.jar:23584720a60a21cdcb5b1ec10269e3013789d6805d153cc696c39ec7ce251896',
-			'com.android.tools:sdklib:26.1.2:sdklib-26.1.2.jar:d3870fafc59ab8efa70d3f9649f40ee299c8ec5b58377b06e8853d7272a5bf4e',
+			'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',
@@ -83,32 +103,44 @@ dependencyVerification {
 			'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:0.2.9.15:tor-android-0.2.9.15.zip:34a6474ee219ffa52e0f3393e917dda6ed03d320b02247d4fa5075aa4094ee6d',
+			'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-android/src/androidTest/java/org/briarproject/bramble/plugin/tor/BridgeTest.java

@@ -0,0 +1,129 @@
+package org.briarproject.bramble.plugin.tor;
+
+import android.content.Context;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.briarproject.bramble.api.event.EventBus;
+import org.briarproject.bramble.api.network.NetworkManager;
+import org.briarproject.bramble.api.plugin.BackoffFactory;
+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.test.BrambleAndroidIntegrationTestComponent;
+import org.briarproject.bramble.test.BrambleTestCase;
+import org.briarproject.bramble.test.DaggerBrambleAndroidIntegrationTestComponent;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.List;
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledThreadPoolExecutor;
+import java.util.logging.Logger;
+
+import javax.inject.Inject;
+import javax.net.SocketFactory;
+
+import static android.support.test.InstrumentationRegistry.getTargetContext;
+import static java.util.Collections.singletonList;
+import static java.util.concurrent.TimeUnit.SECONDS;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+
+@RunWith(AndroidJUnit4.class)
+public class BridgeTest extends BrambleTestCase {
+
+	private final static long TIMEOUT = SECONDS.toMillis(23);
+
+	private final static Logger LOG =
+			Logger.getLogger(BridgeTest.class.getSimpleName());
+
+	@Inject
+	NetworkManager networkManager;
+	@Inject
+	EventBus eventBus;
+	@Inject
+	BackoffFactory backoffFactory;
+	@Inject
+	Clock clock;
+
+	private final Context appContext = getTargetContext();
+	private final CircumventionProvider circumventionProvider;
+	private final List<String> bridges;
+	private TorPluginFactory factory;
+	private volatile int currentBridge = 0;
+
+	public BridgeTest() {
+		super();
+		circumventionProvider = 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(bridges.get(currentBridge));
+			}
+		};
+		bridges = new CircumventionProviderImpl(appContext).getBridges();
+	}
+
+	@Before
+	public void setUp() {
+		BrambleAndroidIntegrationTestComponent component =
+				DaggerBrambleAndroidIntegrationTestComponent.builder().build();
+		component.inject(this);
+
+		Executor ioExecutor = Executors.newCachedThreadPool();
+		ScheduledExecutorService scheduler = new ScheduledThreadPoolExecutor(1);
+		LocationUtils locationUtils = () -> "US";
+		SocketFactory torSocketFactory = SocketFactory.getDefault();
+
+		factory = new TorPluginFactory(ioExecutor, scheduler, appContext,
+				networkManager, locationUtils, eventBus, torSocketFactory,
+				backoffFactory, circumventionProvider, clock);
+	}
+
+	@Test
+	public void testBridges() throws Exception {
+		assertTrue(bridges.size() > 0);
+
+		for (int i = 0; i < bridges.size(); i++) {
+			testBridge(i);
+		}
+	}
+
+	private void testBridge(int bridge) throws Exception {
+		DuplexPlugin duplexPlugin =
+				factory.createPlugin(new TorPluginCallBack());
+		assertNotNull(duplexPlugin);
+		TorPlugin plugin = (TorPlugin) duplexPlugin;
+
+		currentBridge = bridge;
+		LOG.warning("Testing " + bridges.get(currentBridge));
+		try {
+			plugin.start();
+			long start = clock.currentTimeMillis();
+			while (clock.currentTimeMillis() - start < TIMEOUT) {
+				if (plugin.isRunning()) return;
+				clock.sleep(500);
+			}
+			if (!plugin.isRunning()) {
+				fail("Could not connect to Tor within timeout.");
+			}
+		} finally {
+			plugin.stop();
+		}
+	}
+
+}

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

@@ -0,0 +1,54 @@
+package org.briarproject.bramble.plugin.tor;
+
+import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.duplex.DuplexPluginCallback;
+import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
+import org.briarproject.bramble.api.properties.TransportProperties;
+import org.briarproject.bramble.api.settings.Settings;
+
+@NotNullByDefault
+public class TorPluginCallBack implements DuplexPluginCallback {
+
+	@Override
+	public void incomingConnectionCreated(DuplexTransportConnection d) {
+
+	}
+
+	@Override
+	public void outgoingConnectionCreated(ContactId c,
+			DuplexTransportConnection d) {
+
+	}
+
+	@Override
+	public Settings getSettings() {
+		return new Settings();
+	}
+
+	@Override
+	public TransportProperties getLocalProperties() {
+		return new TransportProperties();
+	}
+
+	@Override
+	public void mergeSettings(Settings s) {
+
+	}
+
+	@Override
+	public void mergeLocalProperties(TransportProperties p) {
+
+	}
+
+	@Override
+	public void transportEnabled() {
+
+	}
+
+	@Override
+	public void transportDisabled() {
+
+	}
+
+}

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

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

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

@@ -0,0 +1,26 @@
+package org.briarproject.bramble.test;
+
+import org.briarproject.bramble.BrambleAndroidModule;
+import org.briarproject.bramble.event.EventModule;
+import org.briarproject.bramble.plugin.PluginModule;
+import org.briarproject.bramble.plugin.tor.BridgeTest;
+import org.briarproject.bramble.system.SystemModule;
+
+import javax.inject.Singleton;
+
+import dagger.Component;
+
+@Singleton
+@Component(modules = {
+		BrambleAndroidModule.class,
+		TestLifecycleModule.class,
+		ApplicationModule.class,
+		PluginModule.class,  // needed for BackoffFactory
+		EventModule.class,
+		SystemModule.class,
+})
+public interface BrambleAndroidIntegrationTestComponent {
+
+	void inject(BridgeTest init);
+
+}

bramble-android/src/main/AndroidManifest.xml

@@ -2,14 +2,13 @@
 	package="org.briarproject.bramble"
 	xmlns:android="http://schemas.android.com/apk/res/android">
 
-	<uses-feature android:name="android.hardware.bluetooth"/>
+	<uses-feature android:name="android.hardware.bluetooth" android:required="false"/>
 
 	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
 	<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
 	<uses-permission android:name="android.permission.BLUETOOTH"/>
 	<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
 	<uses-permission android:name="android.permission.INTERNET"/>
-	<uses-permission android:name="android.permission.READ_LOGS"/>
 	<uses-permission android:name="android.permission.WAKE_LOCK"/>
 
 	<application

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

@@ -1,11 +1,27 @@
 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.CircumventionProviderImpl;
 import org.briarproject.bramble.system.AndroidSystemModule;
 
+import javax.inject.Singleton;
+
 import dagger.Module;
+import dagger.Provides;
 
 @Module(includes = {
+		AndroidNetworkModule.class,
 		AndroidSystemModule.class
 })
 public class BrambleAndroidModule {
+
+	@Provides
+	@Singleton
+	CircumventionProvider provideCircumventionProvider(Application app) {
+		return new CircumventionProviderImpl(app.getApplicationContext());
+	}
+
 }

bramble-android/src/main/java/org/briarproject/bramble/account/AndroidAccountManager.java

@@ -0,0 +1,108 @@
+package org.briarproject.bramble.account;
+
+import android.app.Application;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+
+import org.briarproject.bramble.api.account.AccountManager;
+import org.briarproject.bramble.api.crypto.CryptoComponent;
+import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.identity.IdentityManager;
+import org.briarproject.bramble.util.IoUtils;
+
+import java.io.File;
+import java.util.logging.Logger;
+
+import javax.annotation.Nullable;
+import javax.inject.Inject;
+
+class AndroidAccountManager extends AccountManagerImpl
+		implements AccountManager {
+
+	private static final Logger LOG =
+			Logger.getLogger(AndroidAccountManager.class.getName());
+
+	private static final String PREF_DB_KEY = "key";
+
+	protected final Context appContext;
+	private final SharedPreferences prefs;
+
+	@Inject
+	AndroidAccountManager(DatabaseConfig databaseConfig,
+			CryptoComponent crypto, IdentityManager identityManager,
+			SharedPreferences prefs, Application app) {
+		super(databaseConfig, crypto, identityManager);
+		this.prefs = prefs;
+		appContext = app.getApplicationContext();
+	}
+
+	// Locking: stateChangeLock
+	@Override
+	@Nullable
+	protected String loadEncryptedDatabaseKey() {
+		String key = getDatabaseKeyFromPreferences();
+		if (key == null) key = super.loadEncryptedDatabaseKey();
+		else migrateDatabaseKeyToFile(key);
+		return key;
+	}
+
+	// Locking: stateChangeLock
+	@Nullable
+	private String getDatabaseKeyFromPreferences() {
+		String key = prefs.getString(PREF_DB_KEY, null);
+		if (key == null) LOG.info("No database key in preferences");
+		else LOG.info("Found database key in preferences");
+		return key;
+	}
+
+	// Locking: stateChangeLock
+	private void migrateDatabaseKeyToFile(String key) {
+		if (storeEncryptedDatabaseKey(key)) {
+			if (prefs.edit().remove(PREF_DB_KEY).commit())
+				LOG.info("Database key migrated to file");
+			else LOG.warning("Database key not removed from preferences");
+		} else {
+			LOG.warning("Database key not migrated to file");
+		}
+	}
+
+	@Override
+	public void deleteAccount() {
+		synchronized (stateChangeLock) {
+			super.deleteAccount();
+			SharedPreferences defaultPrefs = getDefaultSharedPreferences();
+			deleteAppData(prefs, defaultPrefs);
+		}
+	}
+
+	// Package access for testing
+	SharedPreferences getDefaultSharedPreferences() {
+		return PreferenceManager.getDefaultSharedPreferences(appContext);
+	}
+
+	// Locking: stateChangeLock
+	private void deleteAppData(SharedPreferences... clear) {
+		// Clear and commit shared preferences
+		for (SharedPreferences prefs : clear) {
+			if (!prefs.edit().clear().commit())
+				LOG.warning("Could not clear shared preferences");
+		}
+		// Delete files, except lib and shared_prefs directories
+		File dataDir = new File(appContext.getApplicationInfo().dataDir);
+		File[] children = dataDir.listFiles();
+		if (children == null) {
+			LOG.warning("Could not list files in app data dir");
+		} else {
+			for (File child : children) {
+				String name = child.getName();
+				if (!name.equals("lib") && !name.equals("shared_prefs")) {
+					IoUtils.deleteFileOrDir(child);
+				}
+			}
+		}
+		// Recreate the cache dir as some OpenGL drivers expect it to exist
+		if (!new File(dataDir, "cache").mkdir())
+			LOG.warning("Could not recreate cache dir");
+	}
+}

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

@@ -0,0 +1,142 @@
+package org.briarproject.bramble.network;
+
+import android.app.Application;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+
+import org.briarproject.bramble.api.event.EventBus;
+import org.briarproject.bramble.api.lifecycle.Service;
+import org.briarproject.bramble.api.network.NetworkManager;
+import org.briarproject.bramble.api.network.NetworkStatus;
+import org.briarproject.bramble.api.network.event.NetworkStatusEvent;
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.bramble.api.system.Scheduler;
+
+import java.util.concurrent.Future;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.logging.Logger;
+
+import javax.annotation.Nullable;
+import javax.inject.Inject;
+
+import static android.content.Context.CONNECTIVITY_SERVICE;
+import static android.content.Intent.ACTION_SCREEN_OFF;
+import static android.content.Intent.ACTION_SCREEN_ON;
+import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
+import static android.net.ConnectivityManager.TYPE_WIFI;
+import static android.os.Build.VERSION.SDK_INT;
+import static android.os.PowerManager.ACTION_DEVICE_IDLE_MODE_CHANGED;
+import static java.util.concurrent.TimeUnit.MINUTES;
+import static java.util.concurrent.TimeUnit.SECONDS;
+import static java.util.logging.Level.INFO;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+class AndroidNetworkManager implements NetworkManager, Service {
+
+	private static final Logger LOG =
+			Logger.getLogger(AndroidNetworkManager.class.getName());
+
+	// See android.net.wifi.WifiManager
+	private static final String WIFI_AP_STATE_CHANGED_ACTION =
+			"android.net.wifi.WIFI_AP_STATE_CHANGED";
+
+	private final ScheduledExecutorService scheduler;
+	private final EventBus eventBus;
+	private final Context appContext;
+	private final AtomicReference<Future<?>> connectivityCheck =
+			new AtomicReference<>();
+	private final AtomicBoolean used = new AtomicBoolean(false);
+
+	private volatile BroadcastReceiver networkStateReceiver = null;
+
+	@Inject
+	AndroidNetworkManager(@Scheduler ScheduledExecutorService scheduler,
+			EventBus eventBus, Application app) {
+		this.scheduler = scheduler;
+		this.eventBus = eventBus;
+		this.appContext = app.getApplicationContext();
+	}
+
+	@Override
+	public void startService() {
+		if (used.getAndSet(true)) throw new IllegalStateException();
+		// Register to receive network status events
+		networkStateReceiver = new NetworkStateReceiver();
+		IntentFilter filter = new IntentFilter();
+		filter.addAction(CONNECTIVITY_ACTION);
+		filter.addAction(ACTION_SCREEN_ON);
+		filter.addAction(ACTION_SCREEN_OFF);
+		filter.addAction(WIFI_AP_STATE_CHANGED_ACTION);
+		if (SDK_INT >= 23) filter.addAction(ACTION_DEVICE_IDLE_MODE_CHANGED);
+		appContext.registerReceiver(networkStateReceiver, filter);
+
+	}
+
+	@Override
+	public void stopService() {
+		if (networkStateReceiver != null)
+			appContext.unregisterReceiver(networkStateReceiver);
+	}
+
+	@Override
+	public NetworkStatus getNetworkStatus() {
+		ConnectivityManager cm = (ConnectivityManager)
+				appContext.getSystemService(CONNECTIVITY_SERVICE);
+		assert cm != null;
+		NetworkInfo net = cm.getActiveNetworkInfo();
+		boolean connected = net != null && net.isConnected();
+		boolean wifi = connected && net.getType() == TYPE_WIFI;
+		return new NetworkStatus(connected, wifi);
+	}
+
+	private void updateConnectionStatus() {
+		eventBus.broadcast(new NetworkStatusEvent(getNetworkStatus()));
+	}
+
+	private void scheduleConnectionStatusUpdate(int delay, TimeUnit unit) {
+		Future<?> newConnectivityCheck =
+				scheduler.schedule(this::updateConnectionStatus, delay, unit);
+		Future<?> oldConnectivityCheck =
+				connectivityCheck.getAndSet(newConnectivityCheck);
+		if (oldConnectivityCheck != null) oldConnectivityCheck.cancel(false);
+	}
+
+	private class NetworkStateReceiver extends BroadcastReceiver {
+
+		@Override
+		public void onReceive(Context ctx, Intent i) {
+			String action = i.getAction();
+			if (LOG.isLoggable(INFO)) LOG.info("Received broadcast " + action);
+			updateConnectionStatus();
+			if (isSleepOrDozeEvent(action)) {
+				// Allow time for the network to be enabled or disabled
+				scheduleConnectionStatusUpdate(1, MINUTES);
+			} else if (isApEvent(action)) {
+				// The state change may be broadcast before the AP address is
+				// visible, so delay handling the event
+				scheduleConnectionStatusUpdate(5, SECONDS);
+			}
+		}
+
+		private boolean isSleepOrDozeEvent(@Nullable String action) {
+			boolean isSleep = ACTION_SCREEN_ON.equals(action) ||
+					ACTION_SCREEN_OFF.equals(action);
+			boolean isDoze = SDK_INT >= 23 &&
+					ACTION_DEVICE_IDLE_MODE_CHANGED.equals(action);
+			return isSleep || isDoze;
+		}
+
+		private boolean isApEvent(@Nullable String action) {
+			return WIFI_AP_STATE_CHANGED_ACTION.equals(action);
+		}
+	}
+}

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

@@ -0,0 +1,21 @@
+package org.briarproject.bramble.network;
+
+import org.briarproject.bramble.api.lifecycle.LifecycleManager;
+import org.briarproject.bramble.api.network.NetworkManager;
+
+import javax.inject.Singleton;
+
+import dagger.Module;
+import dagger.Provides;
+
+@Module
+public class AndroidNetworkModule {
+
+	@Provides
+	@Singleton
+	NetworkManager provideNetworkManager(LifecycleManager lifecycleManager,
+			AndroidNetworkManager networkManager) {
+		lifecycleManager.registerService(networkManager);
+		return networkManager;
+	}
+}

bramble-android/src/main/java/org/briarproject/bramble/plugin/bluetooth/AndroidBluetoothPlugin.java

@@ -38,6 +38,7 @@ import static android.bluetooth.BluetoothAdapter.SCAN_MODE_NONE;
 import static android.bluetooth.BluetoothAdapter.STATE_OFF;
 import static android.bluetooth.BluetoothAdapter.STATE_ON;
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -145,7 +146,7 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
 		try {
 			if (ss != null) ss.close();
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -185,7 +186,7 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
 		try {
 			if (c != null) c.close();
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 

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

@@ -1,15 +1,16 @@
 package org.briarproject.bramble.plugin.tcp;
 
-import android.content.BroadcastReceiver;
 import android.content.Context;
-import android.content.Intent;
-import android.content.IntentFilter;
 import android.net.ConnectivityManager;
 import android.net.Network;
 import android.net.NetworkInfo;
 import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
 
+import org.briarproject.bramble.PoliteExecutor;
+import org.briarproject.bramble.api.event.Event;
+import org.briarproject.bramble.api.event.EventListener;
+import org.briarproject.bramble.api.network.event.NetworkStatusEvent;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.Backoff;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginCallback;
@@ -20,7 +21,6 @@ import java.net.Socket;
 import java.net.UnknownHostException;
 import java.util.Collection;
 import java.util.concurrent.Executor;
-import java.util.concurrent.ScheduledExecutorService;
 import java.util.logging.Logger;
 
 import javax.annotation.Nullable;
@@ -28,21 +28,13 @@ import javax.net.SocketFactory;
 
 import static android.content.Context.CONNECTIVITY_SERVICE;
 import static android.content.Context.WIFI_SERVICE;
-import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
 import static android.net.ConnectivityManager.TYPE_WIFI;
-import static android.net.wifi.WifiManager.EXTRA_WIFI_STATE;
 import static android.os.Build.VERSION.SDK_INT;
 import static java.util.Collections.emptyList;
 import static java.util.Collections.singletonList;
-import static java.util.concurrent.TimeUnit.SECONDS;
 
 @NotNullByDefault
-class AndroidLanTcpPlugin extends LanTcpPlugin {
-
-	// See android.net.wifi.WifiManager
-	private static final String WIFI_AP_STATE_CHANGED_ACTION =
-			"android.net.wifi.WIFI_AP_STATE_CHANGED";
-	private static final int WIFI_AP_STATE_ENABLED = 13;
+class AndroidLanTcpPlugin extends LanTcpPlugin implements EventListener {
 
 	private static final byte[] WIFI_AP_ADDRESS_BYTES =
 			{(byte) 192, (byte) 168, 43, 1};
@@ -60,25 +52,23 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 		}
 	}
 
-	private final ScheduledExecutorService scheduler;
-	private final Context appContext;
+	private final Executor connectionStatusExecutor;
 	private final ConnectivityManager connectivityManager;
 	@Nullable
 	private final WifiManager wifiManager;
 
-	@Nullable
-	private volatile BroadcastReceiver networkStateReceiver = null;
 	private volatile SocketFactory socketFactory;
 
-	AndroidLanTcpPlugin(Executor ioExecutor, ScheduledExecutorService scheduler,
-			Backoff backoff, Context appContext, DuplexPluginCallback callback,
-			int maxLatency, int maxIdleTime) {
+	AndroidLanTcpPlugin(Executor ioExecutor, Context appContext,
+			Backoff backoff, DuplexPluginCallback callback, int maxLatency,
+			int maxIdleTime) {
 		super(ioExecutor, backoff, callback, maxLatency, maxIdleTime);
-		this.scheduler = scheduler;
-		this.appContext = appContext;
+		// Don't execute more than one connection status check at a time
+		connectionStatusExecutor =
+				new PoliteExecutor("AndroidLanTcpPlugin", ioExecutor, 1);
 		ConnectivityManager connectivityManager = (ConnectivityManager)
 				appContext.getSystemService(CONNECTIVITY_SERVICE);
-		if (connectivityManager == null) throw new AssertionError();
+		assert connectivityManager != null;
 		this.connectivityManager = connectivityManager;
 		wifiManager = (WifiManager) appContext.getApplicationContext()
 				.getSystemService(WIFI_SERVICE);
@@ -89,19 +79,12 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 	public void start() {
 		if (used.getAndSet(true)) throw new IllegalStateException();
 		running = true;
-		// Register to receive network status events
-		networkStateReceiver = new NetworkStateReceiver();
-		IntentFilter filter = new IntentFilter();
-		filter.addAction(CONNECTIVITY_ACTION);
-		filter.addAction(WIFI_AP_STATE_CHANGED_ACTION);
-		appContext.registerReceiver(networkStateReceiver, filter);
+		updateConnectionStatus();
 	}
 
 	@Override
 	public void stop() {
 		running = false;
-		if (networkStateReceiver != null)
-			appContext.unregisterReceiver(networkStateReceiver);
 		tryToClose(socket);
 	}
 
@@ -120,7 +103,7 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 			return singletonList(intToInetAddress(info.getIpAddress()));
 		// If we're running an access point, return its address
 		if (super.getLocalIpAddresses().contains(WIFI_AP_ADDRESS))
-				return singletonList(WIFI_AP_ADDRESS);
+			return singletonList(WIFI_AP_ADDRESS);
 		// No suitable addresses
 		return emptyList();
 	}
@@ -152,21 +135,13 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 		return SocketFactory.getDefault();
 	}
 
-	private class NetworkStateReceiver extends BroadcastReceiver {
+	@Override
+	public void eventOccurred(Event e) {
+		if (e instanceof NetworkStatusEvent) updateConnectionStatus();
+	}
 
-		@Override
-		public void onReceive(Context ctx, Intent i) {
-			if (!running) return;
-			if (isApEnabledEvent(i)) {
-				// The state change may be broadcast before the AP address is
-				// visible, so delay handling the event
-				scheduler.schedule(this::handleConnectivityChange, 1, SECONDS);
-			} else {
-				handleConnectivityChange();
-			}
-		}
-
-		private void handleConnectivityChange() {
+	private void updateConnectionStatus() {
+		connectionStatusExecutor.execute(() -> {
 			if (!running) return;
 			Collection<InetAddress> addrs = getLocalIpAddresses();
 			if (addrs.contains(WIFI_AP_ADDRESS)) {
@@ -186,11 +161,6 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 				socketFactory = getSocketFactory();
 				if (socket == null || socket.isClosed()) bind();
 			}
-		}
-
-		private boolean isApEnabledEvent(Intent i) {
-			return WIFI_AP_STATE_CHANGED_ACTION.equals(i.getAction()) &&
-					i.getIntExtra(EXTRA_WIFI_STATE, 0) == WIFI_AP_STATE_ENABLED;
-		}
+		});
 	}
-}
+}

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

@@ -2,6 +2,7 @@ package org.briarproject.bramble.plugin.tcp;
 
 import android.content.Context;
 
+import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.Backoff;
 import org.briarproject.bramble.api.plugin.BackoffFactory;
@@ -11,7 +12,6 @@ import org.briarproject.bramble.api.plugin.duplex.DuplexPluginCallback;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
 
 import java.util.concurrent.Executor;
-import java.util.concurrent.ScheduledExecutorService;
 
 import javax.annotation.concurrent.Immutable;
 
@@ -28,15 +28,14 @@ public class AndroidLanTcpPluginFactory implements DuplexPluginFactory {
 	private static final double BACKOFF_BASE = 1.2;
 
 	private final Executor ioExecutor;
-	private final ScheduledExecutorService scheduler;
+	private final EventBus eventBus;
 	private final BackoffFactory backoffFactory;
 	private final Context appContext;
 
-	public AndroidLanTcpPluginFactory(Executor ioExecutor,
-			ScheduledExecutorService scheduler, BackoffFactory backoffFactory,
-			Context appContext) {
+	public AndroidLanTcpPluginFactory(Executor ioExecutor, EventBus eventBus,
+			BackoffFactory backoffFactory, Context appContext) {
 		this.ioExecutor = ioExecutor;
-		this.scheduler = scheduler;
+		this.eventBus = eventBus;
 		this.backoffFactory = backoffFactory;
 		this.appContext = appContext;
 	}
@@ -55,7 +54,9 @@ public class AndroidLanTcpPluginFactory implements DuplexPluginFactory {
 	public DuplexPlugin createPlugin(DuplexPluginCallback callback) {
 		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
 				MAX_POLLING_INTERVAL, BACKOFF_BASE);
-		return new AndroidLanTcpPlugin(ioExecutor, scheduler, backoff,
-				appContext, callback, MAX_LATENCY, MAX_IDLE_TIME);
+		AndroidLanTcpPlugin plugin = new AndroidLanTcpPlugin(ioExecutor,
+				appContext, backoff, callback, MAX_LATENCY, MAX_IDLE_TIME);
+		eventBus.addListener(plugin);
+		return plugin;
 	}
 }

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

@@ -0,0 +1,32 @@
+package org.briarproject.bramble.plugin.tor;
+
+import org.briarproject.bramble.api.lifecycle.IoExecutor;
+
+import java.util.List;
+
+// TODO: Create a module for this so it doesn't have to be public
+
+public interface CircumventionProvider {
+
+	/**
+	 * Countries where Tor is blocked, i.e. vanilla Tor connection won't work.
+	 *
+	 * See https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2
+	 * and https://trac.torproject.org/projects/tor/wiki/doc/OONI/censorshipwiki
+	 */
+	String[] BLOCKED = {"CN", "IR", "EG", "BY", "TR", "SY", "VE"};
+
+	/**
+	 * Countries where vanilla bridge connection are likely to work.
+	 * Should be a subset of {@link #BLOCKED}.
+	 */
+	String[] BRIDGES = { "EG", "BY", "TR", "SY", "VE" };
+
+	boolean isTorProbablyBlocked(String countryCode);
+
+	boolean doBridgesWork(String countryCode);
+
+	@IoExecutor
+	List<String> getBridges();
+
+}

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

@@ -0,0 +1,70 @@
+package org.briarproject.bramble.plugin.tor;
+
+import android.content.Context;
+import android.content.res.Resources;
+
+import org.briarproject.bramble.api.lifecycle.IoExecutor;
+
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Scanner;
+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
+
+public class CircumventionProviderImpl implements CircumventionProvider {
+
+	private final static String BRIDGE_FILE_NAME = "bridges";
+
+	private final Context ctx;
+	@Nullable
+	private volatile List<String> bridges = null;
+
+	@Inject
+	public CircumventionProviderImpl(Context ctx) {
+		this.ctx = ctx;
+	}
+
+	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);
+	}
+
+	@Override
+	public boolean doBridgesWork(String countryCode) {
+		return BRIDGES_WORK_IN_COUNTRIES.contains(countryCode);
+	}
+
+	@Override
+	@IoExecutor
+	public List<String> getBridges() {
+		if (this.bridges != null) return this.bridges;
+
+		Resources res = ctx.getResources();
+		int resId = res.getIdentifier(BRIDGE_FILE_NAME, "raw",
+				ctx.getPackageName());
+		InputStream is = ctx.getResources().openRawResource(resId);
+		Scanner scanner = new Scanner(is);
+
+		List<String> bridges = new ArrayList<>();
+		while (scanner.hasNextLine()) {
+			String line = scanner.nextLine();
+			if (!line.startsWith("#")) bridges.add(line);
+		}
+		scanner.close();
+		this.bridges = bridges;
+		return bridges;
+	}
+
+}

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

@@ -1,18 +0,0 @@
-package org.briarproject.bramble.plugin.tor;
-
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.Set;
-
-class TorNetworkMetadata {
-
-	// See https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2
-	// and https://trac.torproject.org/projects/tor/wiki/doc/OONI/censorshipwiki
-	// TODO: get a more complete list
-	private static final Set<String> BLOCKED_IN_COUNTRIES =
-			new HashSet<>(Arrays.asList("CN", "IR", "SY", "ZZ"));
-
-	static boolean isTorProbablyBlocked(String countryCode) {
-		return BLOCKED_IN_COUNTRIES.contains(countryCode);
-	}
-}

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

@@ -1,15 +1,10 @@
 package org.briarproject.bramble.plugin.tor;
 
-import android.content.BroadcastReceiver;
 import android.content.Context;
-import android.content.Intent;
-import android.content.IntentFilter;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.res.Resources;
-import android.net.ConnectivityManager;
-import android.net.NetworkInfo;
 import android.os.PowerManager;
 
 import net.freehaven.tor.control.EventHandler;
@@ -21,6 +16,9 @@ import org.briarproject.bramble.api.data.BdfList;
 import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.event.EventListener;
 import org.briarproject.bramble.api.keyagreement.KeyAgreementListener;
+import org.briarproject.bramble.api.network.NetworkManager;
+import org.briarproject.bramble.api.network.NetworkStatus;
+import org.briarproject.bramble.api.network.event.NetworkStatusEvent;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.bramble.api.plugin.Backoff;
@@ -50,17 +48,17 @@ import java.io.OutputStream;
 import java.net.InetSocketAddress;
 import java.net.ServerSocket;
 import java.net.Socket;
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Scanner;
 import java.util.concurrent.Executor;
-import java.util.concurrent.Future;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicReference;
 import java.util.logging.Logger;
 import java.util.regex.Pattern;
 import java.util.zip.ZipInputStream;
@@ -68,15 +66,8 @@ import java.util.zip.ZipInputStream;
 import javax.annotation.Nullable;
 import javax.net.SocketFactory;
 
-import static android.content.Context.CONNECTIVITY_SERVICE;
 import static android.content.Context.MODE_PRIVATE;
 import static android.content.Context.POWER_SERVICE;
-import static android.content.Intent.ACTION_SCREEN_OFF;
-import static android.content.Intent.ACTION_SCREEN_ON;
-import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
-import static android.net.ConnectivityManager.TYPE_WIFI;
-import static android.os.Build.VERSION.SDK_INT;
-import static android.os.PowerManager.ACTION_DEVICE_IDLE_MODE_CHANGED;
 import static android.os.PowerManager.PARTIAL_WAKE_LOCK;
 import static java.util.concurrent.TimeUnit.MINUTES;
 import static java.util.logging.Level.INFO;
@@ -85,12 +76,14 @@ import static net.freehaven.tor.control.TorControlCommands.HS_ADDRESS;
 import static net.freehaven.tor.control.TorControlCommands.HS_PRIVKEY;
 import static org.briarproject.bramble.api.plugin.TorConstants.CONTROL_PORT;
 import static org.briarproject.bramble.api.plugin.TorConstants.ID;
+import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_DISABLE_BLOCKED;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_ALWAYS;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_NEVER;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_WIFI;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_PORT;
 import static org.briarproject.bramble.api.plugin.TorConstants.PROP_ONION;
+import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.PrivacyUtils.scrubOnion;
 
 @MethodsNotNullByDefault
@@ -110,43 +103,43 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			Logger.getLogger(TorPlugin.class.getName());
 
 	private final Executor ioExecutor, connectionStatusExecutor;
-	private final ScheduledExecutorService scheduler;
 	private final Context appContext;
+	private final NetworkManager networkManager;
 	private final LocationUtils locationUtils;
 	private final SocketFactory torSocketFactory;
 	private final Clock clock;
 	private final Backoff backoff;
 	private final DuplexPluginCallback callback;
 	private final String architecture;
+	private final CircumventionProvider circumventionProvider;
 	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 AtomicReference<Future<?>> connectivityCheck =
-			new AtomicReference<>();
 	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;
-	private volatile BroadcastReceiver networkStateReceiver = null;
 
 	TorPlugin(Executor ioExecutor, ScheduledExecutorService scheduler,
-			Context appContext, LocationUtils locationUtils,
-			SocketFactory torSocketFactory, Clock clock, Backoff backoff,
-			DuplexPluginCallback callback, String architecture,
-			int maxLatency, int maxIdleTime) {
+			Context appContext, NetworkManager networkManager,
+			LocationUtils locationUtils, SocketFactory torSocketFactory,
+			Clock clock, CircumventionProvider circumventionProvider,
+			Backoff backoff, DuplexPluginCallback callback,
+			String architecture, int maxLatency, int maxIdleTime) {
 		this.ioExecutor = ioExecutor;
-		this.scheduler = scheduler;
 		this.appContext = appContext;
+		this.networkManager = networkManager;
 		this.locationUtils = locationUtils;
 		this.torSocketFactory = torSocketFactory;
 		this.clock = clock;
 		this.backoff = backoff;
 		this.callback = callback;
 		this.architecture = architecture;
+		this.circumventionProvider = circumventionProvider;
 		this.maxLatency = maxLatency;
 		this.maxIdleTime = maxIdleTime;
 		if (maxIdleTime > Integer.MAX_VALUE / 2)
@@ -160,8 +153,8 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		doneFile = new File(torDirectory, "done");
 		cookieFile = new File(torDirectory, ".tor/control_auth_cookie");
 		// Don't execute more than one connection status check at a time
-		connectionStatusExecutor = new PoliteExecutor("TorPlugin",
-				ioExecutor, 1);
+		connectionStatusExecutor =
+				new PoliteExecutor("TorPlugin", ioExecutor, 1);
 		PowerManager pm = (PowerManager)
 				appContext.getSystemService(POWER_SERVICE);
 		wakeLock = new RenewableWakeLock(pm, scheduler, PARTIAL_WAKE_LOCK,
@@ -188,6 +181,8 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		if (used.getAndSet(true)) throw new IllegalStateException();
 		// Install or update the assets if necessary
 		if (!assetsAreUpToDate()) installAssets();
+		if (cookieFile.exists() && !cookieFile.delete())
+			LOG.warning("Old auth cookie not deleted");
 		// Start a new Tor process
 		LOG.info("Starting Tor");
 		String torPath = torFile.getAbsolutePath();
@@ -264,14 +259,8 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		} catch (IOException e) {
 			throw new PluginException(e);
 		}
-		// Register to receive network status events
-		networkStateReceiver = new NetworkStateReceiver();
-		IntentFilter filter = new IntentFilter();
-		filter.addAction(CONNECTIVITY_ACTION);
-		filter.addAction(ACTION_SCREEN_ON);
-		filter.addAction(ACTION_SCREEN_OFF);
-		if (SDK_INT >= 23) filter.addAction(ACTION_DEVICE_IDLE_MODE_CHANGED);
-		appContext.registerReceiver(networkStateReceiver, filter);
+		// Check whether we're online
+		updateConnectionStatus(networkManager.getNetworkStatus());
 		// Bind a server socket to receive incoming hidden service connections
 		bind();
 	}
@@ -345,7 +334,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		try {
 			if (c != null) c.close();
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -353,7 +342,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		try {
 			if (s != null) s.close();
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -395,7 +384,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				ss = new ServerSocket();
 				ss.bind(new InetSocketAddress("127.0.0.1", port));
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				tryToClose(ss);
 				return;
 			}
@@ -421,7 +410,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		try {
 			if (ss != null) ss.close();
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		} finally {
 			callback.transportDisabled();
 		}
@@ -440,7 +429,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				response = controlConnection.addOnion(portLines);
 			else response = controlConnection.addOnion(privKey, portLines);
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			return;
 		}
 		if (!response.containsKey(HS_ADDRESS)) {
@@ -495,12 +484,21 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		}
 	}
 
+	private void enableBridges(boolean enable) throws IOException {
+		if (enable) {
+			Collection<String> conf = new ArrayList<>();
+			conf.add("UseBridges 1");
+			conf.addAll(circumventionProvider.getBridges());
+			controlConnection.setConf(conf);
+		} else {
+			controlConnection.setConf("UseBridges", "0");
+		}
+	}
+
 	@Override
 	public void stop() {
 		running = false;
 		tryToClose(socket);
-		if (networkStateReceiver != null)
-			appContext.unregisterReceiver(networkStateReceiver);
 		if (controlSocket != null && controlConnection != null) {
 			try {
 				LOG.info("Stopping Tor");
@@ -508,7 +506,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				controlConnection.shutdownTor("TERM");
 				controlSocket.close();
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 		wakeLock.release();
@@ -562,7 +560,6 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		try {
 			if (LOG.isLoggable(INFO))
 				LOG.info("Connecting to " + scrubOnion(onion));
-			controlConnection.forgetHiddenService(onion);
 			s = torSocketFactory.createSocket(onion + ".onion", 80);
 			s.setSoTimeout(socketTimeout);
 			if (LOG.isLoggable(INFO))
@@ -611,8 +608,10 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	@Override
 	public void orConnStatus(String status, String orName) {
 		if (LOG.isLoggable(INFO)) LOG.info("OR connection " + status);
-		if (status.equals("CLOSED") || status.equals("FAILED"))
-			updateConnectionStatus(); // Check whether we've lost connectivity
+		if (status.equals("CLOSED") || status.equals("FAILED")) {
+			// Check whether we've lost connectivity
+			updateConnectionStatus(networkManager.getNetworkStatus());
+		}
 	}
 
 	@Override
@@ -645,24 +644,25 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			SettingsUpdatedEvent s = (SettingsUpdatedEvent) e;
 			if (s.getNamespace().equals(ID.getString())) {
 				LOG.info("Tor settings updated");
-				updateConnectionStatus();
+				updateConnectionStatus(networkManager.getNetworkStatus());
 			}
+		} else if (e instanceof NetworkStatusEvent) {
+			updateConnectionStatus(((NetworkStatusEvent) e).getStatus());
 		}
 	}
 
-	private void updateConnectionStatus() {
+	private void updateConnectionStatus(NetworkStatus status) {
 		connectionStatusExecutor.execute(() -> {
 			if (!running) return;
-			Object o = appContext.getSystemService(CONNECTIVITY_SERVICE);
-			ConnectivityManager cm = (ConnectivityManager) o;
-			NetworkInfo net = cm.getActiveNetworkInfo();
-			boolean online = net != null && net.isConnected();
-			boolean wifi = online && net.getType() == TYPE_WIFI;
+			boolean online = status.isConnected();
+			boolean wifi = status.isWifi();
 			String country = locationUtils.getCurrentCountry();
-			boolean blocked = TorNetworkMetadata.isTorProbablyBlocked(
-					country);
+			boolean blocked =
+					circumventionProvider.isTorProbablyBlocked(country);
 			Settings s = callback.getSettings();
 			int network = s.getInt(PREF_TOR_NETWORK, PREF_TOR_NETWORK_ALWAYS);
+			boolean disableWhenBlocked =
+					s.getBoolean(PREF_TOR_DISABLE_BLOCKED, true);
 
 			if (LOG.isLoggable(INFO)) {
 				LOG.info("Online: " + online + ", wifi: " + wifi);
@@ -674,46 +674,34 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				if (!online) {
 					LOG.info("Disabling network, device is offline");
 					enableNetwork(false);
-				} else if (blocked) {
-					LOG.info("Disabling network, country is blocked");
-					enableNetwork(false);
 				} else if (network == PREF_TOR_NETWORK_NEVER
 						|| (network == PREF_TOR_NETWORK_WIFI && !wifi)) {
 					LOG.info("Disabling network due to data setting");
 					enableNetwork(false);
+				} else if (blocked) {
+					if (circumventionProvider.doBridgesWork(country)) {
+						LOG.info("Enabling network, using bridges");
+						enableBridges(true);
+						enableNetwork(true);
+					} else if (disableWhenBlocked) {
+						LOG.info("Disabling network, country is blocked");
+						enableNetwork(false);
+					} else {
+						LOG.info("Enabling network but country is blocked");
+						enableBridges(false);
+						enableNetwork(true);
+					}
 				} else {
 					LOG.info("Enabling network");
+					enableBridges(false);
 					enableNetwork(true);
 				}
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		});
 	}
 
-	private void scheduleConnectionStatusUpdate() {
-		Future<?> newConnectivityCheck =
-				scheduler.schedule(this::updateConnectionStatus, 1, MINUTES);
-		Future<?> oldConnectivityCheck =
-				connectivityCheck.getAndSet(newConnectivityCheck);
-		if (oldConnectivityCheck != null) oldConnectivityCheck.cancel(false);
-	}
-
-	private class NetworkStateReceiver extends BroadcastReceiver {
-
-		@Override
-		public void onReceive(Context ctx, Intent i) {
-			if (!running) return;
-			String action = i.getAction();
-			if (LOG.isLoggable(INFO)) LOG.info("Received broadcast " + action);
-			updateConnectionStatus();
-			if (ACTION_SCREEN_ON.equals(action)
-					|| ACTION_SCREEN_OFF.equals(action)) {
-				scheduleConnectionStatusUpdate();
-			}
-		}
-	}
-
 	private static class ConnectionStatus {
 
 		// All of the following are locking: this

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

@@ -4,6 +4,7 @@ import android.content.Context;
 import android.os.Build;
 
 import org.briarproject.bramble.api.event.EventBus;
+import org.briarproject.bramble.api.network.NetworkManager;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.Backoff;
 import org.briarproject.bramble.api.plugin.BackoffFactory;
@@ -39,24 +40,29 @@ public class TorPluginFactory implements DuplexPluginFactory {
 	private final Executor ioExecutor;
 	private final ScheduledExecutorService scheduler;
 	private final Context appContext;
+	private final NetworkManager networkManager;
 	private final LocationUtils locationUtils;
 	private final EventBus eventBus;
 	private final SocketFactory torSocketFactory;
 	private final BackoffFactory backoffFactory;
+	private final CircumventionProvider circumventionProvider;
 	private final Clock clock;
 
 	public TorPluginFactory(Executor ioExecutor,
 			ScheduledExecutorService scheduler, Context appContext,
-			LocationUtils locationUtils, EventBus eventBus,
-			SocketFactory torSocketFactory, BackoffFactory backoffFactory,
-			Clock clock) {
+			NetworkManager networkManager, LocationUtils locationUtils,
+			EventBus eventBus, SocketFactory torSocketFactory,
+			BackoffFactory backoffFactory,
+			CircumventionProvider circumventionProvider, Clock clock) {
 		this.ioExecutor = ioExecutor;
 		this.scheduler = scheduler;
 		this.appContext = appContext;
+		this.networkManager = networkManager;
 		this.locationUtils = locationUtils;
 		this.eventBus = eventBus;
 		this.torSocketFactory = torSocketFactory;
 		this.backoffFactory = backoffFactory;
+		this.circumventionProvider = circumventionProvider;
 		this.clock = clock;
 	}
 
@@ -94,8 +100,9 @@ public class TorPluginFactory implements DuplexPluginFactory {
 		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
 				MAX_POLLING_INTERVAL, BACKOFF_BASE);
 		TorPlugin plugin = new TorPlugin(ioExecutor, scheduler, appContext,
-				locationUtils, torSocketFactory, clock, backoff, callback,
-				architecture, MAX_LATENCY, MAX_IDLE_TIME);
+				networkManager, locationUtils, torSocketFactory, clock,
+				circumventionProvider, backoff, callback, architecture,
+				MAX_LATENCY, MAX_IDLE_TIME);
 		eventBus.addListener(plugin);
 		return plugin;
 	}

bramble-android/src/main/java/org/briarproject/bramble/util/AndroidUtils.java

@@ -3,7 +3,6 @@ package org.briarproject.bramble.util;
 import android.annotation.SuppressLint;
 import android.bluetooth.BluetoothAdapter;
 import android.content.Context;
-import android.content.SharedPreferences;
 import android.os.Build;
 import android.provider.Settings;
 
@@ -58,30 +57,6 @@ public class AndroidUtils {
 				&& !address.equals(FAKE_BLUETOOTH_ADDRESS);
 	}
 
-	public static void deleteAppData(Context ctx, SharedPreferences... clear) {
-		// Clear and commit shared preferences
-		for (SharedPreferences prefs : clear) {
-			if (!prefs.edit().clear().commit())
-				LOG.warning("Could not clear shared preferences");
-		}
-		// Delete files, except lib and shared_prefs directories
-		File dataDir = new File(ctx.getApplicationInfo().dataDir);
-		File[] children = dataDir.listFiles();
-		if (children == null) {
-			LOG.warning("Could not list files in app data dir");
-		} else {
-			for (File child : children) {
-				String name = child.getName();
-				if (!name.equals("lib") && !name.equals("shared_prefs")) {
-					IoUtils.deleteFileOrDir(child);
-				}
-			}
-		}
-		// Recreate the cache dir as some OpenGL drivers expect it to exist
-		if (!new File(dataDir, "cache").mkdir())
-			LOG.warning("Could not recreate cache dir");
-	}
-
 	public static File getReportDir(Context ctx) {
 		return ctx.getDir(STORED_REPORTS, MODE_PRIVATE);
 	}

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

@@ -0,0 +1,8 @@
+Bridge 131.252.210.150:8081 0E858AC201BF0F3FA3C462F64844CBFFC7297A42
+Bridge 67.205.189.122:8443 12D64D5D44E20169585E7378580C0D33A872AD98
+Bridge 45.32.148.146:8443 0CE016FB2462D8BF179AE71F7D702D09DEAC3F1D
+Bridge 148.251.90.59:7510 019F727CA6DCA6CA5C90B55E477B7D87981E75BC
+Bridge 195.91.239.8:9001 BA83F62551545655BBEBBFF353A45438D73FD45A
+Bridge 185.165.184.217:6429 64CC94BEC51254E4409AD059192833854CCB95F0
+Bridge 45.55.1.74:8443 6F18FEFBB0CAECD5ABA755312FCCB34FC11A7AB8
+Bridge 95.85.40.163:9001 40057BE9CF76B6C5BDBE713753468BE0A990DE9C

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

@@ -0,0 +1,162 @@
+package org.briarproject.bramble.account;
+
+import android.app.Application;
+import android.content.SharedPreferences;
+import android.content.pm.ApplicationInfo;
+
+import org.briarproject.bramble.api.crypto.CryptoComponent;
+import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.identity.IdentityManager;
+import org.briarproject.bramble.test.BrambleMockTestCase;
+import org.jmock.Expectations;
+import org.jmock.lib.legacy.ClassImposteriser;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.File;
+
+import static junit.framework.Assert.assertEquals;
+import static junit.framework.Assert.assertFalse;
+import static junit.framework.Assert.assertTrue;
+import static org.briarproject.bramble.test.TestUtils.deleteTestDirectory;
+import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
+import static org.briarproject.bramble.test.TestUtils.getTestDirectory;
+import static org.briarproject.bramble.util.StringUtils.toHexString;
+
+public class AndroidAccountManagerTest extends BrambleMockTestCase {
+
+	private final SharedPreferences prefs =
+			context.mock(SharedPreferences.class, "prefs");
+	private final SharedPreferences defaultPrefs =
+			context.mock(SharedPreferences.class, "defaultPrefs");
+	private final DatabaseConfig databaseConfig =
+			context.mock(DatabaseConfig.class);
+	private final CryptoComponent crypto = context.mock(CryptoComponent.class);
+	private final IdentityManager identityManager =
+			context.mock(IdentityManager.class);
+	private final SharedPreferences.Editor
+			editor = context.mock(SharedPreferences.Editor.class);
+	private final Application app;
+	private final ApplicationInfo applicationInfo;
+
+	private final String encryptedKeyHex = toHexString(getRandomBytes(123));
+	private final File testDir = getTestDirectory();
+	private final File keyDir = new File(testDir, "key");
+	private final File keyFile = new File(keyDir, "db.key");
+	private final File keyBackupFile = new File(keyDir, "db.key.bak");
+	private final File dbDir = new File(testDir, "db");
+
+	private AndroidAccountManager accountManager;
+
+	public AndroidAccountManagerTest() {
+		context.setImposteriser(ClassImposteriser.INSTANCE);
+		app = context.mock(Application.class);
+		applicationInfo = new ApplicationInfo();
+		applicationInfo.dataDir = testDir.getAbsolutePath();
+	}
+
+	@Before
+	public void setUp() {
+		context.checking(new Expectations() {{
+			allowing(databaseConfig).getDatabaseDirectory();
+			will(returnValue(dbDir));
+			allowing(databaseConfig).getDatabaseKeyDirectory();
+			will(returnValue(keyDir));
+			allowing(app).getApplicationContext();
+			will(returnValue(app));
+		}});
+		accountManager = new AndroidAccountManager(databaseConfig, crypto,
+				identityManager, prefs, app) {
+			@Override
+			SharedPreferences getDefaultSharedPreferences() {
+				return defaultPrefs;
+			}
+		};
+	}
+
+	@Test
+	public void testDbKeyIsMigratedFromPreferencesToFile() {
+		context.checking(new Expectations() {{
+			oneOf(prefs).getString("key", null);
+			will(returnValue(encryptedKeyHex));
+			oneOf(prefs).edit();
+			will(returnValue(editor));
+			oneOf(editor).remove("key");
+			will(returnValue(editor));
+			oneOf(editor).commit();
+			will(returnValue(true));
+		}});
+
+		assertFalse(keyFile.exists());
+		assertFalse(keyBackupFile.exists());
+
+		assertEquals(encryptedKeyHex,
+				accountManager.loadEncryptedDatabaseKey());
+
+		assertTrue(keyFile.exists());
+		assertTrue(keyBackupFile.exists());
+	}
+
+	@Test
+	public void testDeleteAccountClearsSharedPrefsAndDeletesFiles()
+			throws Exception {
+		// Directories 'lib' and 'shared_prefs' should be spared
+		File libDir = new File(testDir, "lib");
+		File libFile = new File(libDir, "file");
+		File sharedPrefsDir = new File(testDir, "shared_prefs");
+		File sharedPrefsFile = new File(sharedPrefsDir, "file");
+		// Directory 'cache' should be emptied
+		File cacheDir = new File(testDir, "cache");
+		File cacheFile = new File(cacheDir, "file");
+		// Other directories should be deleted
+		File potatoDir = new File(testDir, ".potato");
+		File potatoFile = new File(potatoDir, "file");
+
+		context.checking(new Expectations() {{
+			oneOf(prefs).edit();
+			will(returnValue(editor));
+			oneOf(editor).clear();
+			will(returnValue(editor));
+			oneOf(editor).commit();
+			will(returnValue(true));
+			oneOf(defaultPrefs).edit();
+			will(returnValue(editor));
+			oneOf(editor).clear();
+			will(returnValue(editor));
+			oneOf(editor).commit();
+			will(returnValue(true));
+			oneOf(app).getApplicationInfo();
+			will(returnValue(applicationInfo));
+		}});
+
+		assertTrue(dbDir.mkdirs());
+		assertTrue(keyDir.mkdirs());
+		assertTrue(libDir.mkdirs());
+		assertTrue(libFile.createNewFile());
+		assertTrue(sharedPrefsDir.mkdirs());
+		assertTrue(sharedPrefsFile.createNewFile());
+		assertTrue(cacheDir.mkdirs());
+		assertTrue(cacheFile.createNewFile());
+		assertTrue(potatoDir.mkdirs());
+		assertTrue(potatoFile.createNewFile());
+
+		accountManager.deleteAccount();
+
+		assertFalse(dbDir.exists());
+		assertFalse(keyDir.exists());
+		assertTrue(libDir.exists());
+		assertTrue(libFile.exists());
+		assertTrue(sharedPrefsDir.exists());
+		assertTrue(sharedPrefsFile.exists());
+		assertTrue(cacheDir.exists());
+		assertFalse(cacheFile.exists());
+		assertFalse(potatoDir.exists());
+		assertFalse(potatoFile.exists());
+	}
+
+	@After
+	public void tearDown() {
+		deleteTestDirectory(testDir);
+	}
+}

bramble-api/src/main/java/org/briarproject/bramble/api/account/AccountManager.java

@@ -0,0 +1,70 @@
+package org.briarproject.bramble.api.account;
+
+import org.briarproject.bramble.api.crypto.SecretKey;
+import org.briarproject.bramble.api.identity.IdentityManager;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import javax.annotation.Nullable;
+
+@NotNullByDefault
+public interface AccountManager {
+
+	/**
+	 * Returns true if the manager has the database key. This will be false
+	 * before {@link #createAccount(String, String)} or {@link #signIn(String)}
+	 * has been called, and true after {@link #createAccount(String, String)}
+	 * or {@link #signIn(String)} has returned true, until the process exits.
+	 */
+	boolean hasDatabaseKey();
+
+	/**
+	 * Returns the database key if the manager has it. This will be null
+	 * before {@link #createAccount(String, String)} or {@link #signIn(String)}
+	 * has been called, and non-null after
+	 * {@link #createAccount(String, String)} or {@link #signIn(String)} has
+	 * returned true, until the process exits.
+	 */
+	@Nullable
+	SecretKey getDatabaseKey();
+
+	/**
+	 * Returns true if the encrypted database key can be loaded from disk, and
+	 * the database directory exists and is a directory.
+	 */
+	boolean accountExists();
+
+	/**
+	 * Creates an identity with the given name and registers it with the
+	 * {@link IdentityManager}. Creates a database key, encrypts it with the
+	 * given password and stores it on disk.
+	 * <p/>
+	 * This method does not create the database directory, so
+	 * {@link #accountExists()} will continue to return false until the
+	 * database directory is created.
+	 */
+	boolean createAccount(String name, String password);
+
+	/**
+	 * Deletes all account state from disk. {@link #accountExists()} will
+	 * return false after this method returns.
+	 */
+	void deleteAccount();
+
+	/**
+	 * Loads the encrypted database key from disk and decrypts it with the
+	 * given password.
+	 *
+	 * @return true if the database key was successfully loaded and decrypted.
+	 */
+	boolean signIn(String password);
+
+	/**
+	 * Loads the encrypted database key from disk, decrypts it with the old
+	 * password, encrypts it with the new password, and stores it on disk,
+	 * replacing the old key.
+	 *
+	 * @return true if the database key was successfully loaded, re-encrypted
+	 * and stored.
+	 */
+	boolean changePassword(String oldPassword, String newPassword);
+}

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

@@ -16,7 +16,7 @@ public interface ContactManager {
 	/**
 	 * Registers a hook to be called whenever a contact is added or removed.
 	 * This method should be called before
-	 * {@link LifecycleManager#startServices(String)}.
+	 * {@link LifecycleManager#startServices(SecretKey)}.
 	 */
 	void registerContactHook(ContactHook hook);
 

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

@@ -2,6 +2,7 @@ package org.briarproject.bramble.api.db;
 
 import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorId;
 import org.briarproject.bramble.api.identity.LocalAuthor;
@@ -44,7 +45,8 @@ public interface DatabaseComponent {
 	 * @throws DataTooOldException if the data uses an older schema than the
 	 * current code and cannot be migrated
 	 */
-	boolean open(@Nullable MigrationListener listener) throws DbException;
+	boolean open(SecretKey key, @Nullable MigrationListener listener)
+			throws DbException;
 
 	/**
 	 * Waits for any open transactions to finish and closes the database.
@@ -267,7 +269,7 @@ public interface DatabaseComponent {
 	 * Read-only.
 	 */
 	Collection<MessageId> getMessageIds(Transaction txn, GroupId g)
-		throws DbException;
+			throws DbException;
 
 	/**
 	 * Returns the IDs of any messages that need to be validated.
@@ -487,7 +489,7 @@ public interface DatabaseComponent {
 	 * Removes the given transport keys from the database.
 	 */
 	void removeTransportKeys(Transaction txn, TransportId t, KeySetId k)
-		throws DbException;
+			throws DbException;
 
 	/**
 	 * Marks the given contact as verified.
@@ -534,7 +536,7 @@ public interface DatabaseComponent {
 	 * Marks the given transport keys as usable for outgoing streams.
 	 */
 	void setTransportKeysActive(Transaction txn, TransportId t, KeySetId k)
-		throws DbException;
+			throws DbException;
 
 	/**
 	 * Stores the given transport keys, deleting any keys they have replaced.

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

@@ -1,30 +1,15 @@
 package org.briarproject.bramble.api.db;
 
-import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import java.io.File;
 
-import javax.annotation.Nullable;
-
 @NotNullByDefault
 public interface DatabaseConfig {
 
-	boolean databaseExists();
-
 	File getDatabaseDirectory();
 
 	File getDatabaseKeyDirectory();
 
-	void setEncryptionKey(SecretKey key);
-
-	@Nullable
-	SecretKey getEncryptionKey();
-
-	void setLocalAuthorName(String nickname);
-
-	@Nullable
-	String getLocalAuthorName();
-
 	long getMaxSize();
 }

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

@@ -1,5 +1,6 @@
 package org.briarproject.bramble.api.identity;
 
+import org.briarproject.bramble.api.crypto.CryptoExecutor;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.identity.Author.Status;
@@ -9,29 +10,40 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 public interface IdentityManager {
 
 	/**
-	 * Stores the local pseudonym.
+	 * Creates a local identity with the given name.
 	 */
-	void registerLocalAuthor(LocalAuthor a) throws DbException;
+	@CryptoExecutor
+	LocalAuthor createLocalAuthor(String name);
 
 	/**
-	 * Returns the cached main local identity, non-blocking, or loads it from
-	 * the db, blocking
+	 * Registers the given local identity with the manager. The identity is
+	 * not stored until {@link #storeLocalAuthor()} is called.
+	 */
+	void registerLocalAuthor(LocalAuthor a);
+
+	/**
+	 * Stores the local identity registered with
+	 * {@link #registerLocalAuthor(LocalAuthor)}, if any.
+	 */
+	void storeLocalAuthor() throws DbException;
+
+	/**
+	 * Returns the cached local identity or loads it from the database.
 	 */
 	LocalAuthor getLocalAuthor() throws DbException;
 
 	/**
-	 * Returns the cached main local identity, non-blocking, or loads it from
-	 * the db, blocking, within the given Transaction.
+	 * Returns the cached local identity or loads it from the database.
 	 */
 	LocalAuthor getLocalAuthor(Transaction txn) throws DbException;
 
 	/**
-	 * Returns the trust-level status of the author
+	 * Returns the {@link Status} of the given author.
 	 */
 	Status getAuthorStatus(AuthorId a) throws DbException;
 
 	/**
-	 * Returns the trust-level status of the author
+	 * Returns the {@link Status} of the given author.
 	 */
 	Status getAuthorStatus(Transaction txn, AuthorId a) throws DbException;
 

bramble-api/src/main/java/org/briarproject/bramble/api/lifecycle/IoExecutor.java

@@ -12,7 +12,7 @@ import static java.lang.annotation.RetentionPolicy.RUNTIME;
 
 /**
  * Annotation for injecting the executor for long-running IO tasks. Also used
- * for annotating methods that should run on the UI executor.
+ * for annotating methods that should run on the IO executor.
  * <p>
  * The contract of this executor is that tasks may be run concurrently, and
  * submitting a task will never block. Tasks may run indefinitely. Tasks

bramble-api/src/main/java/org/briarproject/bramble/api/lifecycle/LifecycleManager.java

@@ -1,13 +1,12 @@
 package org.briarproject.bramble.api.lifecycle;
 
+import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.Client;
 
 import java.util.concurrent.ExecutorService;
 
-import javax.annotation.Nullable;
-
 /**
  * Manages the lifecycle of the app, starting {@link Client Clients}, starting
  * and stopping {@link Service Services}, shutting down
@@ -18,7 +17,7 @@ import javax.annotation.Nullable;
 public interface LifecycleManager {
 
 	/**
-	 * The result of calling {@link #startServices(String)}.
+	 * The result of calling {@link #startServices(SecretKey)}.
 	 */
 	enum StartResult {
 		ALREADY_RUNNING,
@@ -44,28 +43,27 @@ public interface LifecycleManager {
 
 	/**
 	 * Registers a {@link Service} to be started and stopped. This method
-	 * should be called before {@link #startServices(String)}.
+	 * should be called before {@link #startServices(SecretKey)}.
 	 */
 	void registerService(Service s);
 
 	/**
 	 * Registers a {@link Client} to be started. This method should be called
-	 * before {@link #startServices(String)}.
+	 * before {@link #startServices(SecretKey)}.
 	 */
 	void registerClient(Client c);
 
 	/**
 	 * Registers an {@link ExecutorService} to be shut down. This method
-	 * should be called before {@link #startServices(String)}.
+	 * should be called before {@link #startServices(SecretKey)}.
 	 */
 	void registerForShutdown(ExecutorService e);
 
 	/**
-	 * Opens the {@link DatabaseComponent}, optionally creates a local author
-	 * with the provided nickname, and starts any registered
-	 * {@link Client Clients} and {@link Service Services}.
+	 * Opens the {@link DatabaseComponent} using the given key and starts any
+	 * registered {@link Client Clients} and {@link Service Services}.
 	 */
-	StartResult startServices(@Nullable String nickname);
+	StartResult startServices(SecretKey dbKey);
 
 	/**
 	 * Stops any registered {@link Service Services}, shuts down any

bramble-api/src/main/java/org/briarproject/bramble/api/network/NetworkManager.java

@@ -0,0 +1,9 @@
+package org.briarproject.bramble.api.network;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+@NotNullByDefault
+public interface NetworkManager {
+
+	NetworkStatus getNetworkStatus();
+}

bramble-api/src/main/java/org/briarproject/bramble/api/network/NetworkStatus.java

@@ -0,0 +1,25 @@
+package org.briarproject.bramble.api.network;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import javax.annotation.concurrent.Immutable;
+
+@Immutable
+@NotNullByDefault
+public class NetworkStatus {
+
+	private final boolean connected, wifi;
+
+	public NetworkStatus(boolean connected, boolean wifi) {
+		this.connected = connected;
+		this.wifi = wifi;
+	}
+
+	public boolean isConnected() {
+		return connected;
+	}
+
+	public boolean isWifi() {
+		return wifi;
+	}
+}

bramble-api/src/main/java/org/briarproject/bramble/api/network/event/NetworkStatusEvent.java

@@ -0,0 +1,22 @@
+package org.briarproject.bramble.api.network.event;
+
+import org.briarproject.bramble.api.event.Event;
+import org.briarproject.bramble.api.network.NetworkStatus;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import javax.annotation.concurrent.Immutable;
+
+@Immutable
+@NotNullByDefault
+public class NetworkStatusEvent extends Event {
+
+	private final NetworkStatus status;
+
+	public NetworkStatusEvent(NetworkStatus status) {
+		this.status = status;
+	}
+
+	public NetworkStatus getStatus() {
+		return status;
+	}
+}

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

@@ -14,6 +14,7 @@ public interface TorConstants {
 
 	String PREF_TOR_NETWORK = "network";
 	String PREF_TOR_PORT = "port";
+	String PREF_TOR_DISABLE_BLOCKED = "disableWhenBlocked";
 
 	int PREF_TOR_NETWORK_NEVER = 0;
 	int PREF_TOR_NETWORK_WIFI = 1;

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

@@ -1,5 +1,6 @@
 package org.briarproject.bramble.api.sync;
 
+import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.Transaction;
@@ -35,7 +36,8 @@ public interface ValidationManager {
 
 	/**
 	 * Registers the message validator for the given client. This method
-	 * should be called before {@link LifecycleManager#startServices(String)}.
+	 * should be called before
+	 * {@link LifecycleManager#startServices(SecretKey)}.
 	 */
 	void registerMessageValidator(ClientId c, int majorVersion,
 			MessageValidator v);
@@ -44,7 +46,7 @@ public interface ValidationManager {
 	 * Registers the incoming message hook for the given client. The hook will
 	 * be called once for each incoming message that passes validation. This
 	 * method should be called before
-	 * {@link LifecycleManager#startServices(String)}.
+	 * {@link LifecycleManager#startServices(SecretKey)}.
 	 */
 	void registerIncomingMessageHook(ClientId c, int majorVersion,
 			IncomingMessageHook hook);

bramble-api/src/main/java/org/briarproject/bramble/api/versioning/ClientVersioningManager.java

@@ -2,6 +2,7 @@ package org.briarproject.bramble.api.versioning;
 
 import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
@@ -25,7 +26,7 @@ public interface ClientVersioningManager {
 	/**
 	 * Registers a client that will be advertised to contacts. The hook will
 	 * be called when the visibility of the client changes. This method should
-	 * be called before {@link LifecycleManager#startServices(String)}.
+	 * be called before {@link LifecycleManager#startServices(SecretKey)}.
 	 */
 	void registerClient(ClientId clientId, int majorVersion, int minorVersion,
 			ClientVersioningHook hook);

bramble-api/src/main/java/org/briarproject/bramble/util/LogUtils.java

@@ -0,0 +1,36 @@
+package org.briarproject.bramble.util;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import static java.util.logging.Level.FINE;
+
+public class LogUtils {
+
+	private static final int NANOS_PER_MILLI = 1000 * 1000;
+
+	/**
+	 * Returns the elapsed time in milliseconds since some arbitrary
+	 * starting time. This is only useful for measuring elapsed time.
+	 */
+	public static long now() {
+		return System.nanoTime() / NANOS_PER_MILLI;
+	}
+
+	/**
+	 * Logs the duration of a task.
+	 * @param logger the logger to use
+	 * @param task a description of the task
+	 * @param start the start time of the task, as returned by {@link #now()}
+	 */
+	public static void logDuration(Logger logger, String task, long start) {
+		if (logger.isLoggable(FINE)) {
+			long duration = now() - start;
+			logger.fine(task + " took " + duration + " ms");
+		}
+	}
+
+	public static void logException(Logger logger, Level level, Throwable t) {
+		if (logger.isLoggable(level)) logger.log(level, t.toString(), t);
+	}
+}

bramble-core/src/main/java/org/briarproject/bramble/PoliteExecutor.java

@@ -5,12 +5,12 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import java.util.LinkedList;
 import java.util.Queue;
 import java.util.concurrent.Executor;
-import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import javax.annotation.concurrent.GuardedBy;
 
 import static java.util.logging.Level.FINE;
+import static org.briarproject.bramble.util.LogUtils.now;
 
 /**
  * An {@link Executor} that delegates its tasks to another {@link Executor}
@@ -20,8 +20,6 @@ import static java.util.logging.Level.FINE;
 @NotNullByDefault
 public class PoliteExecutor implements Executor {
 
-	private static final Level LOG_LEVEL = FINE;
-
 	private final Object lock = new Object();
 	@GuardedBy("lock")
 	private final Queue<Runnable> queue = new LinkedList<>();
@@ -49,11 +47,11 @@ public class PoliteExecutor implements Executor {
 
 	@Override
 	public void execute(Runnable r) {
-		long submitted = System.currentTimeMillis();
+		long submitted = now();
 		Runnable wrapped = () -> {
-			if (log.isLoggable(LOG_LEVEL)) {
-				long queued = System.currentTimeMillis() - submitted;
-				log.log(LOG_LEVEL, "Queue time " + queued + " ms");
+			if (log.isLoggable(FINE)) {
+				long queued = now() - submitted;
+				log.fine("Queue time " + queued + " ms");
 			}
 			try {
 				r.run();

bramble-core/src/main/java/org/briarproject/bramble/TimeLoggingExecutor.java

@@ -6,16 +6,14 @@ import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.RejectedExecutionHandler;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
-import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import static java.util.logging.Level.FINE;
+import static org.briarproject.bramble.util.LogUtils.now;
 
 @NotNullByDefault
 public class TimeLoggingExecutor extends ThreadPoolExecutor {
 
-	private static final Level LOG_LEVEL = FINE;
-
 	private final Logger log;
 
 	public TimeLoggingExecutor(String tag, int corePoolSize, int maxPoolSize,
@@ -29,15 +27,15 @@ public class TimeLoggingExecutor extends ThreadPoolExecutor {
 
 	@Override
 	public void execute(Runnable r) {
-		if (log.isLoggable(LOG_LEVEL)) {
-			long submitted = System.currentTimeMillis();
+		if (log.isLoggable(FINE)) {
+			long submitted = now();
 			super.execute(() -> {
-				long started = System.currentTimeMillis();
+				long started = now();
 				long queued = started - submitted;
-				log.log(LOG_LEVEL, "Queue time " + queued + " ms");
+				log.fine("Queue time " + queued + " ms");
 				r.run();
-				long executing = System.currentTimeMillis() - started;
-				log.log(LOG_LEVEL, "Execution time " + executing + " ms");
+				long executing = now() - started;
+				log.fine("Execution time " + executing + " ms");
 			});
 		} else {
 			super.execute(r);

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

@@ -0,0 +1,221 @@
+package org.briarproject.bramble.account;
+
+import org.briarproject.bramble.api.account.AccountManager;
+import org.briarproject.bramble.api.crypto.CryptoComponent;
+import org.briarproject.bramble.api.crypto.SecretKey;
+import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.identity.IdentityManager;
+import org.briarproject.bramble.api.identity.LocalAuthor;
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.bramble.util.IoUtils;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.logging.Logger;
+
+import javax.annotation.Nullable;
+import javax.inject.Inject;
+
+import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
+import static org.briarproject.bramble.util.StringUtils.fromHexString;
+import static org.briarproject.bramble.util.StringUtils.toHexString;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+class AccountManagerImpl implements AccountManager {
+
+	private static final Logger LOG =
+			Logger.getLogger(AccountManagerImpl.class.getName());
+
+	private static final String DB_KEY_FILENAME = "db.key";
+	private static final String DB_KEY_BACKUP_FILENAME = "db.key.bak";
+
+	private final DatabaseConfig databaseConfig;
+	private final CryptoComponent crypto;
+	private final IdentityManager identityManager;
+	private final File dbKeyFile, dbKeyBackupFile;
+
+	final Object stateChangeLock = new Object();
+
+	@Nullable
+	private volatile SecretKey databaseKey = null;
+
+	@Inject
+	AccountManagerImpl(DatabaseConfig databaseConfig, CryptoComponent crypto,
+			IdentityManager identityManager) {
+		this.databaseConfig = databaseConfig;
+		this.crypto = crypto;
+		this.identityManager = identityManager;
+		File keyDir = databaseConfig.getDatabaseKeyDirectory();
+		dbKeyFile = new File(keyDir, DB_KEY_FILENAME);
+		dbKeyBackupFile = new File(keyDir, DB_KEY_BACKUP_FILENAME);
+	}
+
+	@Override
+	public boolean hasDatabaseKey() {
+		return databaseKey != null;
+	}
+
+	@Override
+	@Nullable
+	public SecretKey getDatabaseKey() {
+		return databaseKey;
+	}
+
+	// Locking: stateChangeLock
+	@Nullable
+	protected String loadEncryptedDatabaseKey() {
+		String key = readDbKeyFromFile(dbKeyFile);
+		if (key == null) {
+			LOG.info("No database key in primary file");
+			key = readDbKeyFromFile(dbKeyBackupFile);
+			if (key == null) LOG.info("No database key in backup file");
+			else LOG.warning("Found database key in backup file");
+		} else {
+			LOG.info("Found database key in primary file");
+		}
+		return key;
+	}
+
+	// Locking: stateChangeLock
+	@Nullable
+	private String readDbKeyFromFile(File f) {
+		if (!f.exists()) {
+			LOG.info("Key file does not exist");
+			return null;
+		}
+		try {
+			BufferedReader reader = new BufferedReader(new InputStreamReader(
+					new FileInputStream(f), "UTF-8"));
+			String key = reader.readLine();
+			reader.close();
+			return key;
+		} catch (IOException e) {
+			logException(LOG, WARNING, e);
+			return null;
+		}
+	}
+
+	// Locking: stateChangeLock
+	protected boolean storeEncryptedDatabaseKey(String hex) {
+		LOG.info("Storing database key in file");
+		// Create the directory if necessary
+		if (databaseConfig.getDatabaseKeyDirectory().mkdirs())
+			LOG.info("Created database key directory");
+		// If only the backup file exists, rename it so we don't overwrite it
+		if (dbKeyBackupFile.exists() && !dbKeyFile.exists()) {
+			if (dbKeyBackupFile.renameTo(dbKeyFile))
+				LOG.info("Renamed old backup");
+			else LOG.warning("Failed to rename old backup");
+		}
+		try {
+			// Write to the backup file
+			writeDbKeyToFile(hex, dbKeyBackupFile);
+			LOG.info("Stored database key in backup file");
+			// Delete the old primary file, if it exists
+			if (dbKeyFile.exists()) {
+				if (dbKeyFile.delete()) LOG.info("Deleted primary file");
+				else LOG.warning("Failed to delete primary file");
+			}
+			// The backup file becomes the new primary
+			if (dbKeyBackupFile.renameTo(dbKeyFile)) {
+				LOG.info("Renamed backup file to primary");
+			} else {
+				LOG.warning("Failed to rename backup file to primary");
+				return false; // Don't overwrite our only copy
+			}
+			// Write a second copy to the backup file
+			writeDbKeyToFile(hex, dbKeyBackupFile);
+			LOG.info("Stored second copy of database key in backup file");
+			return true;
+		} catch (IOException e) {
+			logException(LOG, WARNING, e);
+			return false;
+		}
+	}
+
+	// Locking: stateChangeLock
+	private void writeDbKeyToFile(String key, File f) throws IOException {
+		FileOutputStream out = new FileOutputStream(f);
+		out.write(key.getBytes("UTF-8"));
+		out.flush();
+		out.close();
+	}
+
+	@Override
+	public boolean accountExists() {
+		synchronized (stateChangeLock) {
+			return loadEncryptedDatabaseKey() != null
+					&& databaseConfig.getDatabaseDirectory().isDirectory();
+		}
+	}
+
+	@Override
+	public boolean createAccount(String name, String password) {
+		synchronized (stateChangeLock) {
+			LocalAuthor localAuthor = identityManager.createLocalAuthor(name);
+			identityManager.registerLocalAuthor(localAuthor);
+			SecretKey key = crypto.generateSecretKey();
+			if (!encryptAndStoreDatabaseKey(key, password)) return false;
+			databaseKey = key;
+			return true;
+		}
+	}
+
+	// Locking: stateChangeLock
+	private boolean encryptAndStoreDatabaseKey(SecretKey key, String password) {
+		byte[] plaintext = key.getBytes();
+		byte[] ciphertext = crypto.encryptWithPassword(plaintext, password);
+		return storeEncryptedDatabaseKey(toHexString(ciphertext));
+	}
+
+	@Override
+	public void deleteAccount() {
+		synchronized (stateChangeLock) {
+			LOG.info("Deleting account");
+			IoUtils.deleteFileOrDir(databaseConfig.getDatabaseKeyDirectory());
+			IoUtils.deleteFileOrDir(databaseConfig.getDatabaseDirectory());
+		}
+	}
+
+	@Override
+	public boolean signIn(String password) {
+		synchronized (stateChangeLock) {
+			SecretKey key = loadAndDecryptDatabaseKey(password);
+			if (key == null) return false;
+			databaseKey = key;
+			return true;
+		}
+	}
+
+	// Locking: stateChangeLock
+	@Nullable
+	private SecretKey loadAndDecryptDatabaseKey(String password) {
+		String hex = loadEncryptedDatabaseKey();
+		if (hex == null) {
+			LOG.warning("Failed to load encrypted database key");
+			return null;
+		}
+		byte[] ciphertext = fromHexString(hex);
+		byte[] plaintext = crypto.decryptWithPassword(ciphertext, password);
+		if (plaintext == null) {
+			LOG.info("Failed to decrypt database key");
+			return null;
+		}
+		return new SecretKey(plaintext);
+	}
+
+	@Override
+	public boolean changePassword(String oldPassword, String newPassword) {
+		synchronized (stateChangeLock) {
+			SecretKey key = loadAndDecryptDatabaseKey(oldPassword);
+			return key != null && encryptAndStoreDatabaseKey(key, newPassword);
+		}
+	}
+}

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

@@ -0,0 +1,18 @@
+package org.briarproject.bramble.account;
+
+import org.briarproject.bramble.api.account.AccountManager;
+
+import javax.inject.Singleton;
+
+import dagger.Module;
+import dagger.Provides;
+
+@Module
+public class AccountModule {
+
+	@Provides
+	@Singleton
+	AccountManager provideAccountManager(AccountManagerImpl accountManager) {
+		return accountManager;
+	}
+}

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

@@ -46,6 +46,7 @@ import javax.inject.Inject;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.contact.RecordTypes.CONTACT_INFO;
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_SIGNATURE_LENGTH;
+import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.ValidationUtils.checkLength;
 import static org.briarproject.bramble.util.ValidationUtils.checkSize;
 
@@ -122,7 +123,7 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 			in = conn.getReader().getInputStream();
 			out = conn.getWriter().getOutputStream();
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			listener.contactExchangeFailed();
 			tryToClose(conn);
 			return;
@@ -133,7 +134,7 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 		try {
 			localProperties = transportPropertyManager.getLocalProperties();
 		} catch (DbException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			listener.contactExchangeFailed();
 			tryToClose(conn);
 			return;
@@ -194,7 +195,7 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 				LOG.info("End of stream");
 			}
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			listener.contactExchangeFailed();
 			tryToClose(conn);
 			return;
@@ -222,11 +223,11 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 			LOG.info("Pseudonym exchange succeeded");
 			listener.contactExchangeSucceeded(remoteInfo.author);
 		} catch (ContactExistsException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			tryToClose(conn);
 			listener.duplicateContact(remoteInfo.author);
 		} catch (DbException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			tryToClose(conn);
 			listener.contactExchangeFailed();
 		}
@@ -307,7 +308,7 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 			conn.getReader().dispose(true, true);
 			conn.getWriter().dispose(true);
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/crypto/CryptoComponentImpl.java

@@ -32,6 +32,8 @@ import javax.inject.Inject;
 
 import static java.util.logging.Level.INFO;
 import static org.briarproject.bramble.util.ByteUtils.INT_32_BYTES;
+import static org.briarproject.bramble.util.LogUtils.logDuration;
+import static org.briarproject.bramble.util.LogUtils.now;
 
 @NotNullByDefault
 class CryptoComponentImpl implements CryptoComponent {
@@ -127,16 +129,14 @@ class CryptoComponentImpl implements CryptoComponent {
 			throw new IllegalArgumentException();
 		if (!(pub instanceof Curve25519PublicKey))
 			throw new IllegalArgumentException();
-		long now = System.currentTimeMillis();
+		long start = now();
 		byte[] secret = curve25519.calculateAgreement(pub.getEncoded(),
 				priv.getEncoded());
 		// If the shared secret is all zeroes, the public key is invalid
 		byte allZero = 0;
 		for (byte b : secret) allZero |= b;
 		if (allZero == 0) throw new GeneralSecurityException();
-		long duration = System.currentTimeMillis() - now;
-		if (LOG.isLoggable(INFO))
-			LOG.info("Deriving shared secret took " + duration + " ms");
+		logDuration(LOG, "Deriving shared secret", start);
 		return secret;
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/crypto/ScryptKdf.java

@@ -10,6 +10,8 @@ import java.util.logging.Logger;
 import javax.inject.Inject;
 
 import static java.util.logging.Level.INFO;
+import static org.briarproject.bramble.util.LogUtils.logDuration;
+import static org.briarproject.bramble.util.LogUtils.now;
 
 class ScryptKdf implements PasswordBasedKdf {
 
@@ -50,13 +52,11 @@ class ScryptKdf implements PasswordBasedKdf {
 
 	@Override
 	public SecretKey deriveKey(String password, byte[] salt, int cost) {
-		long start = System.currentTimeMillis();
+		long start = now();
 		byte[] passwordBytes = StringUtils.toUtf8(password);
 		SecretKey k = new SecretKey(SCrypt.generate(passwordBytes, salt, cost,
 				BLOCK_SIZE, PARALLELIZATION, SecretKey.LENGTH));
-		long duration = System.currentTimeMillis() - start;
-		if (LOG.isLoggable(INFO))
-			LOG.info("Deriving key from password took " + duration + " ms");
+		logDuration(LOG, "Deriving key from password", start);
 		return k;
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/crypto/Sec1KeyParser.java

@@ -16,7 +16,8 @@ import java.util.logging.Logger;
 
 import javax.annotation.concurrent.Immutable;
 
-import static java.util.logging.Level.INFO;
+import static org.briarproject.bramble.util.LogUtils.logDuration;
+import static org.briarproject.bramble.util.LogUtils.now;
 
 /**
  * A key parser that uses the encoding defined in "SEC 1: Elliptic Curve
@@ -48,7 +49,7 @@ class Sec1KeyParser implements KeyParser {
 			throws GeneralSecurityException {
 		// The validation procedure comes from SEC 1, section 3.2.2.1. Note
 		// that SEC 1 parameter names are used below, not RFC 5639 names
-		long now = System.currentTimeMillis();
+		long start = now();
 		if (encodedKey.length != publicKeyBytes)
 			throw new GeneralSecurityException();
 		// The first byte must be 0x04
@@ -80,16 +81,14 @@ class Sec1KeyParser implements KeyParser {
 		// Construct a public key from the point (x, y) and the params
 		ECPublicKeyParameters k = new ECPublicKeyParameters(pub, params);
 		PublicKey p = new Sec1PublicKey(k);
-		long duration = System.currentTimeMillis() - now;
-		if (LOG.isLoggable(INFO))
-			LOG.info("Parsing public key took " + duration + " ms");
+		logDuration(LOG, "Parsing public key", start);
 		return p;
 	}
 
 	@Override
 	public PrivateKey parsePrivateKey(byte[] encodedKey)
 			throws GeneralSecurityException {
-		long now = System.currentTimeMillis();
+		long start = now();
 		if (encodedKey.length != privateKeyBytes)
 			throw new GeneralSecurityException();
 		BigInteger d = new BigInteger(1, encodedKey); // Positive signum
@@ -99,9 +98,7 @@ class Sec1KeyParser implements KeyParser {
 		// Construct a private key from the private value and the params
 		ECPrivateKeyParameters k = new ECPrivateKeyParameters(d, params);
 		PrivateKey p = new Sec1PrivateKey(k, keyBits);
-		long duration = System.currentTimeMillis() - now;
-		if (LOG.isLoggable(INFO))
-			LOG.info("Parsing private key took " + duration + " ms");
+		logDuration(LOG, "Parsing private key", start);
 		return p;
 	}
 }

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

@@ -2,6 +2,7 @@ package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DataTooNewException;
 import org.briarproject.bramble.api.db.DataTooOldException;
 import org.briarproject.bramble.api.db.DbException;
@@ -48,7 +49,8 @@ interface Database<T> {
 	 * @throws DataTooOldException if the data uses an older schema than the
 	 * current code and cannot be migrated
 	 */
-	boolean open(@Nullable MigrationListener listener) throws DbException;
+	boolean open(SecretKey key, @Nullable MigrationListener listener)
+			throws DbException;
 
 	/**
 	 * Prevents new transactions from starting, waits for all current
@@ -641,7 +643,7 @@ interface Database<T> {
 	 * Marks the given transport keys as usable for outgoing streams.
 	 */
 	void setTransportKeysActive(T txn, TransportId t, KeySetId k)
-		throws DbException;
+			throws DbException;
 
 	/**
 	 * Updates the transmission count and expiry time of the given message

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

@@ -6,6 +6,7 @@ import org.briarproject.bramble.api.contact.event.ContactAddedEvent;
 import org.briarproject.bramble.api.contact.event.ContactRemovedEvent;
 import org.briarproject.bramble.api.contact.event.ContactStatusChangedEvent;
 import org.briarproject.bramble.api.contact.event.ContactVerifiedEvent;
+import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.ContactExistsException;
 import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
@@ -68,13 +69,15 @@ import javax.annotation.Nullable;
 import javax.annotation.concurrent.ThreadSafe;
 import javax.inject.Inject;
 
-import static java.util.logging.Level.FINE;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.sync.Group.Visibility.INVISIBLE;
 import static org.briarproject.bramble.api.sync.Group.Visibility.SHARED;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.DELIVERED;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.UNKNOWN;
 import static org.briarproject.bramble.db.DatabaseConstants.MAX_OFFERED_MESSAGES;
+import static org.briarproject.bramble.util.LogUtils.logDuration;
+import static org.briarproject.bramble.util.LogUtils.logException;
+import static org.briarproject.bramble.util.LogUtils.now;
 
 @ThreadSafe
 @NotNullByDefault
@@ -101,14 +104,14 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 	}
 
 	@Override
-	public boolean open(@Nullable MigrationListener listener)
+	public boolean open(SecretKey key, @Nullable MigrationListener listener)
 			throws DbException {
-		boolean reopened = db.open(listener);
+		boolean reopened = db.open(key, listener);
 		shutdown.addShutdownHook(() -> {
 			try {
 				close();
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		});
 		return reopened;
@@ -125,13 +128,13 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		// Don't allow reentrant locking
 		if (lock.getReadHoldCount() > 0) throw new IllegalStateException();
 		if (lock.getWriteHoldCount() > 0) throw new IllegalStateException();
-		long start = System.currentTimeMillis();
-		if (readOnly) lock.readLock().lock();
-		else lock.writeLock().lock();
-		if (LOG.isLoggable(FINE)) {
-			long duration = System.currentTimeMillis() - start;
-			if (readOnly) LOG.fine("Waited " + duration + " ms for read lock");
-			else LOG.fine("Waited " + duration + " ms for write lock");
+		long start = now();
+		if (readOnly) {
+			lock.readLock().lock();
+			logDuration(LOG, "Waiting for read lock", start);
+		} else {
+			lock.writeLock().lock();
+			logDuration(LOG, "Waiting for write lock", start);
 		}
 		try {
 			return new Transaction(db.startTransaction(), readOnly);

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

@@ -32,6 +32,9 @@ class H2Database extends JdbcDatabase {
 	private final DatabaseConfig config;
 	private final String url;
 
+	@Nullable
+	private volatile SecretKey key = null;
+
 	@Inject
 	H2Database(DatabaseConfig config, Clock clock) {
 		super(HASH_TYPE, SECRET_TYPE, BINARY_TYPE, COUNTER_TYPE, STRING_TYPE,
@@ -44,11 +47,11 @@ class H2Database extends JdbcDatabase {
 	}
 
 	@Override
-	public boolean open(@Nullable MigrationListener listener)
+	public boolean open(SecretKey key, @Nullable MigrationListener listener)
 			throws DbException {
-		boolean reopen = config.databaseExists();
-		if (!reopen) config.getDatabaseDirectory().mkdirs();
-		super.open("org.h2.Driver", reopen, listener);
+		this.key = key;
+		boolean reopen = !config.getDatabaseDirectory().mkdirs();
+		super.open("org.h2.Driver", reopen, key, listener);
 		return reopen;
 	}
 
@@ -63,7 +66,7 @@ class H2Database extends JdbcDatabase {
 	}
 
 	@Override
-	public long getFreeSpace() throws DbException {
+	public long getFreeSpace() {
 		File dir = config.getDatabaseDirectory();
 		long maxSize = config.getMaxSize();
 		long free = dir.getFreeSpace();
@@ -88,7 +91,7 @@ class H2Database extends JdbcDatabase {
 
 	@Override
 	protected Connection createConnection() throws SQLException {
-		SecretKey key = config.getEncryptionKey();
+		SecretKey key = this.key;
 		if (key == null) throw new IllegalStateException();
 		Properties props = new Properties();
 		props.setProperty("user", "user");

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

@@ -33,6 +33,9 @@ class HyperSqlDatabase extends JdbcDatabase {
 	private final DatabaseConfig config;
 	private final String url;
 
+	@Nullable
+	private volatile SecretKey key = null;
+
 	@Inject
 	HyperSqlDatabase(DatabaseConfig config, Clock clock) {
 		super(HASH_TYPE, SECRET_TYPE, BINARY_TYPE, COUNTER_TYPE, STRING_TYPE,
@@ -46,10 +49,11 @@ class HyperSqlDatabase extends JdbcDatabase {
 	}
 
 	@Override
-	public boolean open(@Nullable MigrationListener listener) throws DbException {
-		boolean reopen = config.databaseExists();
-		if (!reopen) config.getDatabaseDirectory().mkdirs();
-		super.open("org.hsqldb.jdbc.JDBCDriver", reopen, listener);
+	public boolean open(SecretKey key, @Nullable MigrationListener listener)
+			throws DbException {
+		this.key = key;
+		boolean reopen = !config.getDatabaseDirectory().mkdirs();
+		super.open("org.hsqldb.jdbc.JDBCDriver", reopen, key, listener);
 		return reopen;
 	}
 
@@ -93,7 +97,7 @@ class HyperSqlDatabase extends JdbcDatabase {
 
 	@Override
 	protected Connection createConnection() throws SQLException {
-		SecretKey key = config.getEncryptionKey();
+		SecretKey key = this.key;
 		if (key == null) throw new IllegalStateException();
 		String hex = StringUtils.toHexString(key.getBytes());
 		return DriverManager.getConnection(url + ";crypt_key=" + hex);

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

@@ -66,6 +66,7 @@ import static org.briarproject.bramble.api.sync.ValidationManager.State.UNKNOWN;
 import static org.briarproject.bramble.db.DatabaseConstants.DB_SETTINGS_NAMESPACE;
 import static org.briarproject.bramble.db.DatabaseConstants.SCHEMA_VERSION_KEY;
 import static org.briarproject.bramble.db.ExponentialBackoff.calculateExpiry;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 /**
  * A generic database implementation that can be used with any JDBC-compatible
@@ -327,7 +328,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 		this.clock = clock;
 	}
 
-	protected void open(String driverClass, boolean reopen,
+	protected void open(String driverClass, boolean reopen, SecretKey key,
 			@Nullable MigrationListener listener) throws DbException {
 		// Load the JDBC driver
 		try {
@@ -404,7 +405,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 		try {
 			if (rs != null) rs.close();
 		} catch (SQLException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -412,7 +413,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 		try {
 			if (s != null) s.close();
 		} catch (SQLException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -509,12 +510,11 @@ abstract class JdbcDatabase implements Database<Connection> {
 			}
 		} catch (SQLException e) {
 			// Try to close the connection
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			try {
 				txn.close();
 			} catch (SQLException e1) {
-				if (LOG.isLoggable(WARNING))
-					LOG.log(WARNING, e1.toString(), e1);
+				logException(LOG, WARNING, e1);
 			}
 			// Whatever happens, allow the database to close
 			connectionsLock.lock();

bramble-core/src/main/java/org/briarproject/bramble/db/Migration38_39.java

@@ -10,6 +10,7 @@ import java.util.logging.Logger;
 import javax.annotation.Nullable;
 
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 class Migration38_39 implements Migration<Connection> {
 
@@ -48,7 +49,7 @@ class Migration38_39 implements Migration<Connection> {
 		try {
 			if (s != null) s.close();
 		} catch (SQLException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/identity/IdentityManagerImpl.java

@@ -1,10 +1,13 @@
 package org.briarproject.bramble.identity;
 
 import org.briarproject.bramble.api.contact.Contact;
+import org.briarproject.bramble.api.crypto.CryptoComponent;
+import org.briarproject.bramble.api.crypto.KeyPair;
 import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.identity.Author.Status;
+import org.briarproject.bramble.api.identity.AuthorFactory;
 import org.briarproject.bramble.api.identity.AuthorId;
 import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.api.identity.LocalAuthor;
@@ -21,6 +24,8 @@ import static org.briarproject.bramble.api.identity.Author.Status.OURSELVES;
 import static org.briarproject.bramble.api.identity.Author.Status.UNKNOWN;
 import static org.briarproject.bramble.api.identity.Author.Status.UNVERIFIED;
 import static org.briarproject.bramble.api.identity.Author.Status.VERIFIED;
+import static org.briarproject.bramble.util.LogUtils.logDuration;
+import static org.briarproject.bramble.util.LogUtils.now;
 
 @ThreadSafe
 @NotNullByDefault
@@ -30,25 +35,51 @@ class IdentityManagerImpl implements IdentityManager {
 			Logger.getLogger(IdentityManagerImpl.class.getName());
 
 	private final DatabaseComponent db;
+	private final CryptoComponent crypto;
+	private final AuthorFactory authorFactory;
 
 	// The local author is immutable so we can cache it
 	@Nullable
 	private volatile LocalAuthor cachedAuthor;
 
 	@Inject
-	IdentityManagerImpl(DatabaseComponent db) {
+	IdentityManagerImpl(DatabaseComponent db, CryptoComponent crypto,
+			AuthorFactory authorFactory) {
 		this.db = db;
+		this.crypto = crypto;
+		this.authorFactory = authorFactory;
 	}
 
 	@Override
-	public void registerLocalAuthor(LocalAuthor localAuthor)
-			throws DbException {
+	public LocalAuthor createLocalAuthor(String name) {
+		long start = now();
+		KeyPair keyPair = crypto.generateSignatureKeyPair();
+		byte[] publicKey = keyPair.getPublic().getEncoded();
+		byte[] privateKey = keyPair.getPrivate().getEncoded();
+		LocalAuthor localAuthor = authorFactory.createLocalAuthor(name,
+				publicKey, privateKey);
+		logDuration(LOG, "Creating local author", start);
+		return localAuthor;
+	}
+
+	@Override
+	public void registerLocalAuthor(LocalAuthor a) {
+		cachedAuthor = a;
+		LOG.info("Local author registered");
+	}
+
+	@Override
+	public void storeLocalAuthor() throws DbException {
+		LocalAuthor cached = cachedAuthor;
+		if (cached == null) {
+			LOG.info("No local author to store");
+			return;
+		}
 		Transaction txn = db.startTransaction(false);
 		try {
-			db.addLocalAuthor(txn, localAuthor);
+			db.addLocalAuthor(txn, cached);
 			db.commitTransaction(txn);
-			cachedAuthor = localAuthor;
-			LOG.info("Local author registered");
+			LOG.info("Local author stored");
 		} finally {
 			db.endTransaction(txn);
 		}

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

@@ -31,6 +31,7 @@ import javax.annotation.Nullable;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.CONNECTION_TIMEOUT;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @NotNullByDefault
 class KeyAgreementConnector {
@@ -134,7 +135,7 @@ class KeyAgreementConnector {
 			Thread.currentThread().interrupt();
 			return null;
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			return null;
 		} finally {
 			stopListening();

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

@@ -28,6 +28,7 @@ import java.util.logging.Logger;
 import javax.inject.Inject;
 
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -120,13 +121,11 @@ class KeyAgreementTaskImpl extends Thread implements KeyAgreementTask,
 			// Broadcast result to caller
 			eventBus.broadcast(new KeyAgreementFinishedEvent(result));
 		} catch (AbortException e) {
-			if (LOG.isLoggable(WARNING))
-				LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			// Notify caller that the protocol was aborted
 			eventBus.broadcast(new KeyAgreementAbortedEvent(e.receivedAbort));
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING))
-				LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			// Notify caller that the connection failed
 			eventBus.broadcast(new KeyAgreementFailedEvent());
 		}

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

@@ -20,6 +20,7 @@ import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.PR
 import static org.briarproject.bramble.api.keyagreement.RecordTypes.ABORT;
 import static org.briarproject.bramble.api.keyagreement.RecordTypes.CONFIRM;
 import static org.briarproject.bramble.api.keyagreement.RecordTypes.KEY;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 /**
  * Handles the sending and receiving of BQP records.
@@ -72,7 +73,7 @@ class KeyAgreementTransport {
 		try {
 			writeRecord(ABORT, new byte[0]);
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			exception = true;
 		}
 		tryToClose(exception);
@@ -83,7 +84,7 @@ class KeyAgreementTransport {
 			kac.getConnection().getReader().dispose(exception, true);
 			kac.getConnection().getWriter().dispose(exception);
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/lifecycle/LifecycleManagerImpl.java

@@ -1,7 +1,6 @@
 package org.briarproject.bramble.lifecycle;
 
-import org.briarproject.bramble.api.crypto.CryptoComponent;
-import org.briarproject.bramble.api.crypto.KeyPair;
+import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DataTooNewException;
 import org.briarproject.bramble.api.db.DataTooOldException;
 import org.briarproject.bramble.api.db.DatabaseComponent;
@@ -9,9 +8,7 @@ import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.event.EventBus;
-import org.briarproject.bramble.api.identity.AuthorFactory;
 import org.briarproject.bramble.api.identity.IdentityManager;
-import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.lifecycle.Service;
 import org.briarproject.bramble.api.lifecycle.ServiceException;
@@ -26,10 +23,10 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Semaphore;
 import java.util.logging.Logger;
 
-import javax.annotation.Nullable;
 import javax.annotation.concurrent.ThreadSafe;
 import javax.inject.Inject;
 
+import static java.util.logging.Level.FINE;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.LifecycleState.MIGRATING_DATABASE;
@@ -43,6 +40,9 @@ import static org.briarproject.bramble.api.lifecycle.LifecycleManager.StartResul
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.StartResult.DB_ERROR;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.StartResult.SERVICE_ERROR;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.StartResult.SUCCESS;
+import static org.briarproject.bramble.util.LogUtils.logDuration;
+import static org.briarproject.bramble.util.LogUtils.logException;
+import static org.briarproject.bramble.util.LogUtils.now;
 
 @ThreadSafe
 @NotNullByDefault
@@ -56,8 +56,6 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 	private final List<Service> services;
 	private final List<Client> clients;
 	private final List<ExecutorService> executors;
-	private final CryptoComponent crypto;
-	private final AuthorFactory authorFactory;
 	private final IdentityManager identityManager;
 	private final Semaphore startStopSemaphore = new Semaphore(1);
 	private final CountDownLatch dbLatch = new CountDownLatch(1);
@@ -68,12 +66,9 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 
 	@Inject
 	LifecycleManagerImpl(DatabaseComponent db, EventBus eventBus,
-			CryptoComponent crypto, AuthorFactory authorFactory,
 			IdentityManager identityManager) {
 		this.db = db;
 		this.eventBus = eventBus;
-		this.crypto = crypto;
-		this.authorFactory = authorFactory;
 		this.identityManager = identityManager;
 		services = new CopyOnWriteArrayList<>();
 		clients = new CopyOnWriteArrayList<>();
@@ -100,48 +95,20 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 		executors.add(e);
 	}
 
-	private LocalAuthor createLocalAuthor(String nickname) {
-		long now = System.currentTimeMillis();
-		KeyPair keyPair = crypto.generateSignatureKeyPair();
-		byte[] publicKey = keyPair.getPublic().getEncoded();
-		byte[] privateKey = keyPair.getPrivate().getEncoded();
-		LocalAuthor localAuthor = authorFactory
-				.createLocalAuthor(nickname, publicKey, privateKey);
-		long duration = System.currentTimeMillis() - now;
-		if (LOG.isLoggable(INFO))
-			LOG.info("Creating local author took " + duration + " ms");
-		return localAuthor;
-	}
-
-	private void registerLocalAuthor(LocalAuthor author) throws DbException {
-		long now = System.currentTimeMillis();
-		identityManager.registerLocalAuthor(author);
-		long duration = System.currentTimeMillis() - now;
-		if (LOG.isLoggable(INFO))
-			LOG.info("Registering local author took " + duration + " ms");
-	}
-
 	@Override
-	public StartResult startServices(@Nullable String nickname) {
+	public StartResult startServices(SecretKey dbKey) {
 		if (!startStopSemaphore.tryAcquire()) {
 			LOG.info("Already starting or stopping");
 			return ALREADY_RUNNING;
 		}
 		try {
 			LOG.info("Starting services");
-			long start = System.currentTimeMillis();
+			long start = now();
 
-			boolean reopened = db.open(this);
-			long duration = System.currentTimeMillis() - start;
-			if (LOG.isLoggable(INFO)) {
-				if (reopened)
-					LOG.info("Reopening database took " + duration + " ms");
-				else LOG.info("Creating database took " + duration + " ms");
-			}
-
-			if (nickname != null) {
-				registerLocalAuthor(createLocalAuthor(nickname));
-			}
+			boolean reopened = db.open(dbKey, this);
+			if (reopened) logDuration(LOG, "Reopening database", start);
+			else logDuration(LOG, "Creating database", start);
+			identityManager.storeLocalAuthor();
 
 			state = STARTING_SERVICES;
 			dbLatch.countDown();
@@ -150,13 +117,11 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 			Transaction txn = db.startTransaction(false);
 			try {
 				for (Client c : clients) {
-					start = System.currentTimeMillis();
+					start = now();
 					c.createLocalState(txn);
-					duration = System.currentTimeMillis() - start;
-					if (LOG.isLoggable(INFO)) {
-						LOG.info("Starting client "
-								+ c.getClass().getSimpleName()
-								+ " took " + duration + " ms");
+					if (LOG.isLoggable(FINE)) {
+						logDuration(LOG, "Starting client "
+								+ c.getClass().getSimpleName(), start);
 					}
 				}
 				db.commitTransaction(txn);
@@ -164,12 +129,11 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 				db.endTransaction(txn);
 			}
 			for (Service s : services) {
-				start = System.currentTimeMillis();
+				start = now();
 				s.startService();
-				duration = System.currentTimeMillis() - start;
-				if (LOG.isLoggable(INFO)) {
-					LOG.info("Starting service " + s.getClass().getSimpleName()
-							+ " took " + duration + " ms");
+				if (LOG.isLoggable(FINE)) {
+					logDuration(LOG, "Starting service "
+							+ s.getClass().getSimpleName(), start);
 				}
 			}
 
@@ -178,16 +142,16 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 			eventBus.broadcast(new LifecycleEvent(RUNNING));
 			return SUCCESS;
 		} catch (DataTooOldException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			return DATA_TOO_OLD_ERROR;
 		} catch (DataTooNewException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			return DATA_TOO_NEW_ERROR;
 		} catch (DbException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			return DB_ERROR;
 		} catch (ServiceException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			return SERVICE_ERROR;
 		} finally {
 			startStopSemaphore.release();
@@ -213,29 +177,26 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 			state = STOPPING;
 			eventBus.broadcast(new LifecycleEvent(STOPPING));
 			for (Service s : services) {
-				long start = System.currentTimeMillis();
+				long start = now();
 				s.stopService();
-				long duration = System.currentTimeMillis() - start;
-				if (LOG.isLoggable(INFO)) {
-					LOG.info("Stopping service " + s.getClass().getSimpleName()
-							+ " took " + duration + " ms");
+				if (LOG.isLoggable(FINE)) {
+					logDuration(LOG, "Stopping service "
+							+ s.getClass().getSimpleName(), start);
 				}
 			}
 			for (ExecutorService e : executors) {
-				if (LOG.isLoggable(INFO)) {
-					LOG.info("Stopping executor "
+				if (LOG.isLoggable(FINE)) {
+					LOG.fine("Stopping executor "
 							+ e.getClass().getSimpleName());
 				}
 				e.shutdownNow();
 			}
-			long start = System.currentTimeMillis();
+			long start = now();
 			db.close();
-			long duration = System.currentTimeMillis() - start;
-			if (LOG.isLoggable(INFO))
-				LOG.info("Closing database took " + duration + " ms");
+			logDuration(LOG, "Closing database", start);
 			shutdownLatch.countDown();
 		} catch (DbException | ServiceException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		} finally {
 			startStopSemaphore.release();
 		}

bramble-core/src/main/java/org/briarproject/bramble/lifecycle/LifecycleModule.java

@@ -1,10 +1,5 @@
 package org.briarproject.bramble.lifecycle;
 
-import org.briarproject.bramble.api.crypto.CryptoComponent;
-import org.briarproject.bramble.api.db.DatabaseComponent;
-import org.briarproject.bramble.api.event.EventBus;
-import org.briarproject.bramble.api.identity.AuthorFactory;
-import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.api.lifecycle.IoExecutor;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.lifecycle.ShutdownManager;
@@ -54,11 +49,9 @@ public class LifecycleModule {
 
 	@Provides
 	@Singleton
-	LifecycleManager provideLifecycleManager(DatabaseComponent db,
-			EventBus eventBus, CryptoComponent crypto,
-			AuthorFactory authorFactory, IdentityManager identityManager) {
-		return new LifecycleManagerImpl(db, eventBus, crypto, authorFactory,
-				identityManager);
+	LifecycleManager provideLifecycleManager(
+			LifecycleManagerImpl lifecycleManager) {
+		return lifecycleManager;
 	}
 
 	@Provides

bramble-core/src/main/java/org/briarproject/bramble/plugin/ConnectionManagerImpl.java

@@ -27,6 +27,7 @@ import javax.inject.Inject;
 
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.transport.TransportConstants.TAG_LENGTH;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 class ConnectionManagerImpl implements ConnectionManager {
 
@@ -135,7 +136,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				byte[] tag = readTag(reader);
 				ctx = keyManager.getStreamContext(transportId, tag);
 			} catch (IOException | DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				disposeReader(true, false);
 				return;
 			}
@@ -151,7 +152,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				createIncomingSession(ctx, reader).run();
 				disposeReader(false, true);
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				disposeReader(true, true);
 			} finally {
 				connectionRegistry.unregisterConnection(contactId, transportId,
@@ -163,7 +164,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				reader.dispose(exception, recognised);
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 	}
@@ -188,7 +189,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				ctx = keyManager.getStreamContext(contactId, transportId);
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				disposeWriter(true);
 				return;
 			}
@@ -204,7 +205,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				createSimplexOutgoingSession(ctx, writer).run();
 				disposeWriter(false);
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				disposeWriter(true);
 			} finally {
 				connectionRegistry.unregisterConnection(contactId, transportId,
@@ -216,7 +217,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				writer.dispose(exception);
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 	}
@@ -246,7 +247,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				byte[] tag = readTag(reader);
 				ctx = keyManager.getStreamContext(transportId, tag);
 			} catch (IOException | DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				disposeReader(true, false);
 				return;
 			}
@@ -265,7 +266,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				incomingSession.run();
 				disposeReader(false, true);
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				disposeReader(true, true);
 			} finally {
 				connectionRegistry.unregisterConnection(contactId, transportId,
@@ -279,7 +280,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				ctx = keyManager.getStreamContext(contactId, transportId);
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				disposeWriter(true);
 				return;
 			}
@@ -294,7 +295,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				outgoingSession.run();
 				disposeWriter(false);
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				disposeWriter(true);
 			}
 		}
@@ -305,7 +306,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				reader.dispose(exception, recognised);
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 
@@ -317,7 +318,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				writer.dispose(exception);
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 	}
@@ -347,7 +348,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				ctx = keyManager.getStreamContext(contactId, transportId);
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				disposeWriter(true);
 				return;
 			}
@@ -364,7 +365,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				outgoingSession.run();
 				disposeWriter(false);
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				disposeWriter(true);
 			}
 		}
@@ -376,7 +377,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				byte[] tag = readTag(reader);
 				ctx = keyManager.getStreamContext(transportId, tag);
 			} catch (IOException | DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				disposeReader(true, false);
 				return;
 			}
@@ -400,7 +401,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				incomingSession.run();
 				disposeReader(false, true);
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				disposeReader(true, true);
 			} finally {
 				connectionRegistry.unregisterConnection(contactId, transportId,
@@ -414,7 +415,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				reader.dispose(exception, recognised);
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 
@@ -426,7 +427,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				writer.dispose(exception);
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 	}

bramble-core/src/main/java/org/briarproject/bramble/plugin/PluginManagerImpl.java

@@ -49,8 +49,12 @@ import java.util.logging.Logger;
 import javax.annotation.concurrent.ThreadSafe;
 import javax.inject.Inject;
 
+import static java.util.logging.Level.FINE;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logDuration;
+import static org.briarproject.bramble.util.LogUtils.logException;
+import static org.briarproject.bramble.util.LogUtils.now;
 
 @ThreadSafe
 @NotNullByDefault
@@ -205,17 +209,16 @@ class PluginManagerImpl implements PluginManager, Service {
 		@Override
 		public void run() {
 			try {
-				long start = System.currentTimeMillis();
+				long start = now();
 				plugin.start();
-				long duration = System.currentTimeMillis() - start;
-				if (LOG.isLoggable(INFO)) {
-					LOG.info("Starting plugin " + plugin.getId() + " took " +
-							duration + " ms");
+				if (LOG.isLoggable(FINE)) {
+					logDuration(LOG, "Starting plugin " + plugin.getId(),
+							start);
 				}
 			} catch (PluginException e) {
 				if (LOG.isLoggable(WARNING)) {
 					LOG.warning("Plugin " + plugin.getId() + " did not start");
-					LOG.log(WARNING, e.toString(), e);
+					logException(LOG, WARNING, e);
 				}
 			} finally {
 				startLatch.countDown();
@@ -243,12 +246,11 @@ class PluginManagerImpl implements PluginManager, Service {
 				// Wait for the plugin to finish starting
 				startLatch.await();
 				// Stop the plugin
-				long start = System.currentTimeMillis();
+				long start = now();
 				plugin.stop();
-				long duration = System.currentTimeMillis() - start;
-				if (LOG.isLoggable(INFO)) {
-					LOG.info("Stopping plugin " + plugin.getId()
-							+ " took " + duration + " ms");
+				if (LOG.isLoggable(FINE)) {
+					logDuration(LOG, "Stopping plugin " + plugin.getId(),
+							start);
 				}
 			} catch (InterruptedException e) {
 				LOG.warning("Interrupted while waiting for plugin to stop");
@@ -256,7 +258,7 @@ class PluginManagerImpl implements PluginManager, Service {
 			} catch (PluginException e) {
 				if (LOG.isLoggable(WARNING)) {
 					LOG.warning("Plugin " + plugin.getId() + " did not stop");
-					LOG.log(WARNING, e.toString(), e);
+					logException(LOG, WARNING, e);
 				}
 			} finally {
 				stopLatch.countDown();
@@ -278,7 +280,7 @@ class PluginManagerImpl implements PluginManager, Service {
 			try {
 				return settingsManager.getSettings(id.getString());
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				return new Settings();
 			}
 		}
@@ -288,7 +290,7 @@ class PluginManagerImpl implements PluginManager, Service {
 			try {
 				return transportPropertyManager.getLocalProperties(id);
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				return new TransportProperties();
 			}
 		}
@@ -298,7 +300,7 @@ class PluginManagerImpl implements PluginManager, Service {
 			try {
 				settingsManager.mergeSettings(s, id.getString());
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 
@@ -307,7 +309,7 @@ class PluginManagerImpl implements PluginManager, Service {
 			try {
 				transportPropertyManager.mergeLocalProperties(id, p);
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 

bramble-core/src/main/java/org/briarproject/bramble/plugin/Poller.java

@@ -41,6 +41,7 @@ import javax.annotation.concurrent.ThreadSafe;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @ThreadSafe
 @NotNullByDefault
@@ -134,7 +135,7 @@ class Poller implements EventListener {
 				if (w != null)
 					connectionManager.manageOutgoingConnection(c, t, w);
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		});
 	}
@@ -150,7 +151,7 @@ class Poller implements EventListener {
 				if (d != null)
 					connectionManager.manageOutgoingConnection(c, t, d);
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		});
 	}
@@ -211,7 +212,7 @@ class Poller implements EventListener {
 			remote.keySet().removeAll(connected);
 			if (!remote.isEmpty()) p.poll(remote);
 		} catch (DbException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 

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

@@ -13,6 +13,7 @@ import javax.annotation.concurrent.ThreadSafe;
 
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @NotNullByDefault
 @ThreadSafe
@@ -92,7 +93,7 @@ class BluetoothConnectionLimiterImpl implements BluetoothConnectionLimiter {
 			conn.getWriter().dispose(false);
 			conn.getReader().dispose(false, false);
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 

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

@@ -43,6 +43,7 @@ import static org.briarproject.bramble.api.plugin.BluetoothConstants.PREF_BT_ENA
 import static org.briarproject.bramble.api.plugin.BluetoothConstants.PROP_ADDRESS;
 import static org.briarproject.bramble.api.plugin.BluetoothConstants.PROP_UUID;
 import static org.briarproject.bramble.api.plugin.BluetoothConstants.UUID_BYTES;
+import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.PrivacyUtils.scrubMacAddress;
 
 @MethodsNotNullByDefault
@@ -169,7 +170,7 @@ abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
 			try {
 				ss = openServerSocket(contactConnectionsUuid);
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				return;
 			}
 			if (!isRunning() || !shouldAllowContactConnections()) {
@@ -336,7 +337,7 @@ abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
 		try {
 			ss = openServerSocket(uuid);
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			return null;
 		}
 		if (!isRunning()) {

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

@@ -15,6 +15,7 @@ import java.util.logging.Logger;
 
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.plugin.FileConstants.PROP_PATH;
+import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
 
 @NotNullByDefault
@@ -51,7 +52,7 @@ abstract class FilePlugin implements SimplexPlugin {
 			FileInputStream in = new FileInputStream(file);
 			return new FileTransportReader(file, in, this);
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			return null;
 		}
 	}
@@ -70,7 +71,7 @@ abstract class FilePlugin implements SimplexPlugin {
 			FileOutputStream out = new FileOutputStream(file);
 			return new FileTransportWriter(file, out, this);
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			return null;
 		}
 	}

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

@@ -9,6 +9,7 @@ import java.io.InputStream;
 import java.util.logging.Logger;
 
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @NotNullByDefault
 class FileTransportReader implements TransportConnectionReader {
@@ -36,7 +37,7 @@ class FileTransportReader implements TransportConnectionReader {
 		try {
 			in.close();
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 		plugin.readerFinished(file, exception, recognised);
 	}

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

@@ -9,6 +9,7 @@ import java.io.OutputStream;
 import java.util.logging.Logger;
 
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @NotNullByDefault
 class FileTransportWriter implements TransportConnectionWriter {
@@ -46,7 +47,7 @@ class FileTransportWriter implements TransportConnectionWriter {
 		try {
 			out.close();
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 		plugin.writerFinished(file, exception);
 	}

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

@@ -35,6 +35,7 @@ import static org.briarproject.bramble.api.plugin.LanTcpConstants.ID;
 import static org.briarproject.bramble.api.plugin.LanTcpConstants.PREF_LAN_IP_PORTS;
 import static org.briarproject.bramble.api.plugin.LanTcpConstants.PROP_IP_PORTS;
 import static org.briarproject.bramble.util.ByteUtils.MAX_16_BIT_UNSIGNED;
+import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.PrivacyUtils.scrubSocketAddress;
 
 @NotNullByDefault
@@ -295,7 +296,7 @@ class LanTcpPlugin extends TcpPlugin {
 			try {
 				ss.close();
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 	}

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

@@ -17,6 +17,7 @@ import javax.xml.parsers.ParserConfigurationException;
 
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.PrivacyUtils.scrubInetAddress;
 
 @ThreadSafe
@@ -59,7 +60,7 @@ class PortMapperImpl implements PortMapper {
 			if (externalString != null)
 				external = InetAddress.getByName(externalString);
 		} catch (IOException | SAXException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 		return new MappingResult(internal, external, port, succeeded);
 	}
@@ -76,7 +77,7 @@ class PortMapperImpl implements PortMapper {
 		try {
 			d.discover();
 		} catch (IOException | SAXException | ParserConfigurationException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 		gateway = d.getValidGateway();
 	}
@@ -87,7 +88,7 @@ class PortMapperImpl implements PortMapper {
 			if (LOG.isLoggable(INFO))
 				LOG.info("Deleted mapping for port " + port);
 		} catch (IOException | SAXException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 }

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

@@ -37,6 +37,7 @@ import javax.annotation.Nullable;
 
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.PrivacyUtils.scrubSocketAddress;
 
 @MethodsNotNullByDefault
@@ -152,7 +153,7 @@ abstract class TcpPlugin implements DuplexPlugin {
 		try {
 			if (ss != null) ss.close();
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		} finally {
 			callback.transportDisabled();
 		}
@@ -306,7 +307,7 @@ abstract class TcpPlugin implements DuplexPlugin {
 		try {
 			ifaces = Collections.list(NetworkInterface.getNetworkInterfaces());
 		} catch (SocketException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			return Collections.emptyList();
 		}
 		List<InetAddress> addrs = new ArrayList<>();

bramble-core/src/main/java/org/briarproject/bramble/reliability/ReliabilityLayerImpl.java

@@ -16,6 +16,7 @@ import java.util.logging.Logger;
 
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -78,7 +79,7 @@ class ReliabilityLayerImpl implements ReliabilityLayer, WriteHandler {
 				Thread.currentThread().interrupt();
 				running = false;
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				running = false;
 			}
 		});

bramble-core/src/main/java/org/briarproject/bramble/reporting/DevReporterImpl.java

@@ -32,6 +32,7 @@ import javax.inject.Inject;
 import javax.net.SocketFactory;
 
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @Immutable
 @NotNullByDefault
@@ -132,7 +133,7 @@ class DevReporterImpl implements DevReporter, EventListener {
 		try {
 			if (c != null) c.close();
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -140,7 +141,7 @@ class DevReporterImpl implements DevReporter, EventListener {
 		try {
 			if (s != null) s.close();
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 }

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

@@ -42,6 +42,7 @@ import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.LifecycleState.STOPPING;
 import static org.briarproject.bramble.api.record.Record.MAX_RECORD_PAYLOAD_BYTES;
 import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_IDS;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 /**
  * An outgoing {@link SyncSession} suitable for duplex transports. The session
@@ -240,7 +241,7 @@ class DuplexOutgoingSession implements SyncSession, EventListener {
 					LOG.info("Generated ack: " + (a != null));
 				if (a != null) writerTasks.add(new WriteAck(a));
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				interrupt();
 			}
 		}
@@ -287,7 +288,7 @@ class DuplexOutgoingSession implements SyncSession, EventListener {
 					LOG.info("Generated batch: " + (b != null));
 				if (b != null) writerTasks.add(new WriteBatch(b));
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				interrupt();
 			}
 		}
@@ -334,7 +335,7 @@ class DuplexOutgoingSession implements SyncSession, EventListener {
 					LOG.info("Generated offer: " + (o != null));
 				if (o != null) writerTasks.add(new WriteOffer(o));
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				interrupt();
 			}
 		}
@@ -379,7 +380,7 @@ class DuplexOutgoingSession implements SyncSession, EventListener {
 					LOG.info("Generated request: " + (r != null));
 				if (r != null) writerTasks.add(new WriteRequest(r));
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				interrupt();
 			}
 		}

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

@@ -28,6 +28,7 @@ import javax.annotation.concurrent.ThreadSafe;
 
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.LifecycleState.STOPPING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 /**
  * An incoming {@link SyncSession}.
@@ -127,7 +128,7 @@ class IncomingSession implements SyncSession, EventListener {
 					db.endTransaction(txn);
 				}
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				interrupt();
 			}
 		}
@@ -153,7 +154,7 @@ class IncomingSession implements SyncSession, EventListener {
 					db.endTransaction(txn);
 				}
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				interrupt();
 			}
 		}
@@ -179,7 +180,7 @@ class IncomingSession implements SyncSession, EventListener {
 					db.endTransaction(txn);
 				}
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				interrupt();
 			}
 		}
@@ -205,7 +206,7 @@ class IncomingSession implements SyncSession, EventListener {
 					db.endTransaction(txn);
 				}
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				interrupt();
 			}
 		}

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

@@ -32,6 +32,7 @@ import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.LifecycleState.STOPPING;
 import static org.briarproject.bramble.api.record.Record.MAX_RECORD_PAYLOAD_BYTES;
 import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_IDS;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 /**
  * An outgoing {@link SyncSession} suitable for simplex transports. The session
@@ -139,7 +140,7 @@ class SimplexOutgoingSession implements SyncSession, EventListener {
 				if (a == null) decrementOutstandingQueries();
 				else writerTasks.add(new WriteAck(a));
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				interrupt();
 			}
 		}
@@ -184,7 +185,7 @@ class SimplexOutgoingSession implements SyncSession, EventListener {
 				if (b == null) decrementOutstandingQueries();
 				else writerTasks.add(new WriteBatch(b));
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				interrupt();
 			}
 		}

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

@@ -40,6 +40,7 @@ import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.DELIVERED;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.INVALID;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.PENDING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @ThreadSafe
 @NotNullByDefault
@@ -110,7 +111,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			}
 			validateNextMessageAsync(unvalidated);
 		} catch (DbException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -144,7 +145,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			LOG.info("Group removed before validation");
 			validateNextMessageAsync(unvalidated);
 		} catch (DbException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -165,7 +166,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			}
 			deliverNextPendingMessageAsync(pending);
 		} catch (DbException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -231,7 +232,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			LOG.info("Group removed before delivery");
 			deliverNextPendingMessageAsync(pending);
 		} catch (DbException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -252,8 +253,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 				storeMessageContextAsync(m, g.getClientId(),
 						g.getMajorVersion(), context);
 			} catch (InvalidMessageException e) {
-				if (LOG.isLoggable(INFO))
-					LOG.log(INFO, e.toString(), e);
+				logException(LOG, INFO, e);
 				Queue<MessageId> invalidate = new LinkedList<>();
 				invalidate.add(m.getId());
 				invalidateNextMessageAsync(invalidate);
@@ -326,7 +326,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 		} catch (NoSuchGroupException e) {
 			LOG.info("Group removed during validation");
 		} catch (DbException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -377,7 +377,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			}
 			shareNextMessageAsync(toShare);
 		} catch (DbException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -412,7 +412,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			LOG.info("Group removed before sharing");
 			shareNextMessageAsync(toShare);
 		} catch (DbException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -440,7 +440,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			LOG.info("Message removed before invalidation");
 			invalidateNextMessageAsync(invalidate);
 		} catch (DbException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -492,7 +492,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 		} catch (NoSuchGroupException e) {
 			LOG.info("Group removed before validation");
 		} catch (DbException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 

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

@@ -13,6 +13,7 @@ import java.util.logging.Logger;
 import javax.annotation.concurrent.Immutable;
 
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @Immutable
 @NotNullByDefault
@@ -49,7 +50,7 @@ class LinuxSecureRandomProvider extends AbstractSecureRandomProvider {
 			out.close();
 		} catch (IOException e) {
 			// On some devices /dev/urandom isn't writable - this isn't fatal
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 

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

@@ -10,6 +10,7 @@ import java.security.SecureRandomSpi;
 import java.util.logging.Logger;
 
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 public class LinuxSecureRandomSpi extends SecureRandomSpi {
 
@@ -39,7 +40,7 @@ public class LinuxSecureRandomSpi extends SecureRandomSpi {
 			out.close();
 		} catch (IOException e) {
 			// On some devices /dev/urandom isn't writable - this isn't fatal
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/transport/TransportKeyManagerImpl.java

@@ -36,6 +36,7 @@ import static org.briarproject.bramble.api.transport.TransportConstants.MAX_CLOC
 import static org.briarproject.bramble.api.transport.TransportConstants.PROTOCOL_VERSION;
 import static org.briarproject.bramble.api.transport.TransportConstants.TAG_LENGTH;
 import static org.briarproject.bramble.util.ByteUtils.MAX_32_BIT_UNSIGNED;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @ThreadSafe
 @NotNullByDefault
@@ -169,7 +170,7 @@ class TransportKeyManagerImpl implements TransportKeyManager {
 					db.endTransaction(txn);
 				}
 			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		});
 	}

bramble-core/src/test/java/org/briarproject/bramble/account/AccountManagerImplTest.java

@@ -0,0 +1,341 @@
+package org.briarproject.bramble.account;
+
+import org.briarproject.bramble.api.crypto.CryptoComponent;
+import org.briarproject.bramble.api.crypto.SecretKey;
+import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.identity.IdentityManager;
+import org.briarproject.bramble.api.identity.LocalAuthor;
+import org.briarproject.bramble.test.BrambleMockTestCase;
+import org.jmock.Expectations;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+import javax.annotation.Nullable;
+
+import static junit.framework.Assert.assertFalse;
+import static junit.framework.Assert.assertNull;
+import static junit.framework.Assert.assertTrue;
+import static org.briarproject.bramble.test.TestUtils.deleteTestDirectory;
+import static org.briarproject.bramble.test.TestUtils.getLocalAuthor;
+import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
+import static org.briarproject.bramble.test.TestUtils.getSecretKey;
+import static org.briarproject.bramble.test.TestUtils.getTestDirectory;
+import static org.briarproject.bramble.util.StringUtils.getRandomString;
+import static org.briarproject.bramble.util.StringUtils.toHexString;
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
+public class AccountManagerImplTest extends BrambleMockTestCase {
+
+	private final DatabaseConfig databaseConfig =
+			context.mock(DatabaseConfig.class);
+	private final CryptoComponent crypto = context.mock(CryptoComponent.class);
+	private final IdentityManager identityManager =
+			context.mock(IdentityManager.class);
+
+	private final SecretKey key = getSecretKey();
+	private final byte[] encryptedKey = getRandomBytes(123);
+	private final String encryptedKeyHex = toHexString(encryptedKey);
+	private final byte[] newEncryptedKey = getRandomBytes(123);
+	private final String newEncryptedKeyHex = toHexString(newEncryptedKey);
+	private final LocalAuthor localAuthor = getLocalAuthor();
+	private final String authorName = localAuthor.getName();
+	private final String password = getRandomString(10);
+	private final String newPassword = getRandomString(10);
+	private final File testDir = getTestDirectory();
+	private final File dbDir = new File(testDir, "db");
+	private final File keyDir = new File(testDir, "key");
+	private final File keyFile = new File(keyDir, "db.key");
+	private final File keyBackupFile = new File(keyDir, "db.key.bak");
+
+	private AccountManagerImpl accountManager;
+
+	@Before
+	public void setUp() {
+		context.checking(new Expectations() {{
+			allowing(databaseConfig).getDatabaseDirectory();
+			will(returnValue(dbDir));
+			allowing(databaseConfig).getDatabaseKeyDirectory();
+			will(returnValue(keyDir));
+		}});
+
+		accountManager =
+				new AccountManagerImpl(databaseConfig, crypto, identityManager);
+
+		assertFalse(keyFile.exists());
+		assertFalse(keyBackupFile.exists());
+	}
+
+	@Test
+	public void testSignInReturnsFalseIfDbKeyCannotBeLoaded() {
+		assertFalse(accountManager.signIn(password));
+		assertFalse(accountManager.hasDatabaseKey());
+
+		assertFalse(keyFile.exists());
+		assertFalse(keyBackupFile.exists());
+	}
+
+	@Test
+	public void testSignInReturnsFalseIfPasswordIsWrong() throws Exception {
+		context.checking(new Expectations() {{
+			oneOf(crypto).decryptWithPassword(encryptedKey, password);
+			will(returnValue(null));
+		}});
+
+		storeDatabaseKey(keyFile, encryptedKeyHex);
+		storeDatabaseKey(keyBackupFile, encryptedKeyHex);
+
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyFile));
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyBackupFile));
+
+		assertFalse(accountManager.signIn(password));
+		assertFalse(accountManager.hasDatabaseKey());
+
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyFile));
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyBackupFile));
+	}
+
+	@Test
+	public void testSignInReturnsTrueIfPasswordIsRight() throws Exception {
+		context.checking(new Expectations() {{
+			oneOf(crypto).decryptWithPassword(encryptedKey, password);
+			will(returnValue(key.getBytes()));
+		}});
+
+		storeDatabaseKey(keyFile, encryptedKeyHex);
+		storeDatabaseKey(keyBackupFile, encryptedKeyHex);
+
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyFile));
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyBackupFile));
+
+		assertTrue(accountManager.signIn(password));
+		assertTrue(accountManager.hasDatabaseKey());
+		SecretKey decrypted = accountManager.getDatabaseKey();
+		assertNotNull(decrypted);
+		assertArrayEquals(key.getBytes(), decrypted.getBytes());
+
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyFile));
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyBackupFile));
+	}
+
+	@Test
+	public void testDbKeyIsLoadedFromPrimaryFile() throws Exception {
+		storeDatabaseKey(keyFile, encryptedKeyHex);
+
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyFile));
+		assertFalse(keyBackupFile.exists());
+
+		assertEquals(encryptedKeyHex,
+				accountManager.loadEncryptedDatabaseKey());
+
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyFile));
+		assertFalse(keyBackupFile.exists());
+	}
+
+	@Test
+	public void testDbKeyIsLoadedFromBackupFile() throws Exception {
+		storeDatabaseKey(keyBackupFile, encryptedKeyHex);
+
+		assertFalse(keyFile.exists());
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyBackupFile));
+
+		assertEquals(encryptedKeyHex,
+				accountManager.loadEncryptedDatabaseKey());
+
+		assertFalse(keyFile.exists());
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyBackupFile));
+	}
+
+	@Test
+	public void testDbKeyIsNullIfNotFound() {
+		assertNull(accountManager.loadEncryptedDatabaseKey());
+
+		assertFalse(keyFile.exists());
+		assertFalse(keyBackupFile.exists());
+	}
+
+	@Test
+	public void testStoringDbKeyOverwritesPrimary() throws Exception {
+		storeDatabaseKey(keyFile, encryptedKeyHex);
+
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyFile));
+		assertFalse(keyBackupFile.exists());
+
+		assertTrue(accountManager.storeEncryptedDatabaseKey(
+				newEncryptedKeyHex));
+
+		assertEquals(newEncryptedKeyHex, loadDatabaseKey(keyFile));
+		assertEquals(newEncryptedKeyHex, loadDatabaseKey(keyBackupFile));
+	}
+
+	@Test
+	public void testStoringDbKeyOverwritesBackup() throws Exception {
+		storeDatabaseKey(keyBackupFile, encryptedKeyHex);
+
+		assertFalse(keyFile.exists());
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyBackupFile));
+
+		assertTrue(accountManager.storeEncryptedDatabaseKey(
+				newEncryptedKeyHex));
+
+		assertEquals(newEncryptedKeyHex, loadDatabaseKey(keyFile));
+		assertEquals(newEncryptedKeyHex, loadDatabaseKey(keyBackupFile));
+	}
+
+	@Test
+	public void testAccountExistsReturnsFalseIfDbKeyCannotBeLoaded() {
+		assertFalse(accountManager.accountExists());
+
+		assertFalse(keyFile.exists());
+		assertFalse(keyBackupFile.exists());
+	}
+
+	@Test
+	public void testAccountExistsReturnsFalseIfDbDirectoryDoesNotExist()
+			throws Exception {
+		storeDatabaseKey(keyFile, encryptedKeyHex);
+		storeDatabaseKey(keyBackupFile, encryptedKeyHex);
+
+		assertFalse(dbDir.exists());
+
+		assertFalse(accountManager.accountExists());
+
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyFile));
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyBackupFile));
+		assertFalse(dbDir.exists());
+	}
+
+	@Test
+	public void testAccountExistsReturnsFalseIfDbDirectoryIsNotDirectory()
+			throws Exception {
+		storeDatabaseKey(keyFile, encryptedKeyHex);
+		storeDatabaseKey(keyBackupFile, encryptedKeyHex);
+
+		assertTrue(dbDir.createNewFile());
+		assertFalse(dbDir.isDirectory());
+
+		assertFalse(accountManager.accountExists());
+
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyFile));
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyBackupFile));
+		assertTrue(dbDir.exists());
+		assertFalse(dbDir.isDirectory());
+	}
+
+	@Test
+	public void testAccountExistsReturnsTrueIfDbDirectoryIsDirectory()
+			throws Exception {
+		storeDatabaseKey(keyFile, encryptedKeyHex);
+		storeDatabaseKey(keyBackupFile, encryptedKeyHex);
+
+		assertTrue(dbDir.mkdirs());
+		assertTrue(dbDir.isDirectory());
+
+		assertTrue(accountManager.accountExists());
+
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyFile));
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyBackupFile));
+		assertTrue(dbDir.exists());
+		assertTrue(dbDir.isDirectory());
+	}
+
+	@Test
+	public void testCreateAccountStoresDbKey() throws Exception {
+		context.checking(new Expectations() {{
+			oneOf(identityManager).createLocalAuthor(authorName);
+			will(returnValue(localAuthor));
+			oneOf(identityManager).registerLocalAuthor(localAuthor);
+			oneOf(crypto).generateSecretKey();
+			will(returnValue(key));
+			oneOf(crypto).encryptWithPassword(key.getBytes(), password);
+			will(returnValue(encryptedKey));
+		}});
+
+		assertFalse(accountManager.hasDatabaseKey());
+
+		assertTrue(accountManager.createAccount(authorName, password));
+
+		assertTrue(accountManager.hasDatabaseKey());
+		SecretKey dbKey = accountManager.getDatabaseKey();
+		assertNotNull(dbKey);
+		assertArrayEquals(key.getBytes(), dbKey.getBytes());
+
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyFile));
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyBackupFile));
+	}
+
+	@Test
+	public void testChangePasswordReturnsFalseIfDbKeyCannotBeLoaded() {
+		assertFalse(accountManager.changePassword(password, newPassword));
+
+		assertFalse(keyFile.exists());
+		assertFalse(keyBackupFile.exists());
+	}
+
+	@Test
+	public void testChangePasswordReturnsFalseIfPasswordIsWrong()
+			throws Exception {
+		context.checking(new Expectations() {{
+			oneOf(crypto).decryptWithPassword(encryptedKey, password);
+			will(returnValue(null));
+		}});
+
+		storeDatabaseKey(keyFile, encryptedKeyHex);
+		storeDatabaseKey(keyBackupFile, encryptedKeyHex);
+
+		assertFalse(accountManager.changePassword(password, newPassword));
+
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyFile));
+		assertEquals(encryptedKeyHex, loadDatabaseKey(keyBackupFile));
+	}
+
+	@Test
+	public void testChangePasswordReturnsTrueIfPasswordIsRight()
+			throws Exception {
+		context.checking(new Expectations() {{
+			oneOf(crypto).decryptWithPassword(encryptedKey, password);
+			will(returnValue(key.getBytes()));
+			oneOf(crypto).encryptWithPassword(key.getBytes(), newPassword);
+			will(returnValue(newEncryptedKey));
+		}});
+
+		storeDatabaseKey(keyFile, encryptedKeyHex);
+		storeDatabaseKey(keyBackupFile, encryptedKeyHex);
+
+		assertTrue(accountManager.changePassword(password, newPassword));
+
+		assertEquals(newEncryptedKeyHex, loadDatabaseKey(keyFile));
+		assertEquals(newEncryptedKeyHex, loadDatabaseKey(keyBackupFile));
+	}
+
+	private void storeDatabaseKey(File f, String hex) throws IOException {
+		f.getParentFile().mkdirs();
+		FileOutputStream out = new FileOutputStream(f);
+		out.write(hex.getBytes("UTF-8"));
+		out.flush();
+		out.close();
+	}
+
+	@Nullable
+	private String loadDatabaseKey(File f) throws IOException {
+		BufferedReader reader = new BufferedReader(new InputStreamReader(
+				new FileInputStream(f), "UTF-8"));
+		String hex = reader.readLine();
+		reader.close();
+		return hex;
+	}
+
+	@After
+	public void tearDown() {
+		deleteTestDirectory(testDir);
+	}
+}

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

@@ -89,6 +89,7 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 			context.mock(ShutdownManager.class);
 	private final EventBus eventBus = context.mock(EventBus.class);
 
+	private final SecretKey key = getSecretKey();
 	private final Object txn = new Object();
 	private final ClientId clientId;
 	private final int majorVersion;
@@ -141,7 +142,7 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 		int shutdownHandle = 12345;
 		context.checking(new Expectations() {{
 			// open()
-			oneOf(database).open(null);
+			oneOf(database).open(key, null);
 			will(returnValue(false));
 			oneOf(shutdown).addShutdownHook(with(any(Runnable.class)));
 			will(returnValue(shutdownHandle));
@@ -208,7 +209,7 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 		DatabaseComponent db = createDatabaseComponent(database, eventBus,
 				shutdown);
 
-		assertFalse(db.open(null));
+		assertFalse(db.open(key, null));
 		Transaction transaction = db.startTransaction(false);
 		try {
 			db.addLocalAuthor(transaction, localAuthor);
@@ -1602,7 +1603,7 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 		MessageId messageId2 = new MessageId(getRandomId());
 		context.checking(new Expectations() {{
 			// open()
-			oneOf(database).open(null);
+			oneOf(database).open(key, null);
 			will(returnValue(false));
 			oneOf(shutdown).addShutdownHook(with(any(Runnable.class)));
 			will(returnValue(shutdownHandle));
@@ -1646,7 +1647,7 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 		DatabaseComponent db = createDatabaseComponent(database, eventBus,
 				shutdown);
 
-		assertFalse(db.open(null));
+		assertFalse(db.open(key, null));
 		Transaction transaction = db.startTransaction(false);
 		try {
 			db.addLocalMessage(transaction, message, metadata, true);

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

@@ -1,5 +1,6 @@
 package org.briarproject.bramble.db;
 
+import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DataTooNewException;
 import org.briarproject.bramble.api.db.DataTooOldException;
 import org.briarproject.bramble.api.db.DatabaseConfig;
@@ -26,6 +27,7 @@ import static java.util.Collections.singletonList;
 import static org.briarproject.bramble.db.DatabaseConstants.DB_SETTINGS_NAMESPACE;
 import static org.briarproject.bramble.db.DatabaseConstants.SCHEMA_VERSION_KEY;
 import static org.briarproject.bramble.db.JdbcDatabase.CODE_SCHEMA_VERSION;
+import static org.briarproject.bramble.test.TestUtils.getSecretKey;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
@@ -43,6 +45,7 @@ public abstract class DatabaseMigrationTest extends BrambleMockTestCase {
 
 	protected final DatabaseConfig config =
 			new TestDatabaseConfig(testDir, 1024 * 1024);
+	protected final SecretKey key = getSecretKey();
 	protected final Clock clock = new SystemClock();
 
 	abstract Database<Connection> createDatabase(
@@ -62,7 +65,7 @@ public abstract class DatabaseMigrationTest extends BrambleMockTestCase {
 	public void testDoesNotRunMigrationsWhenCreatingDatabase()
 			throws Exception {
 		Database<Connection> db = createDatabase(singletonList(migration));
-		assertFalse(db.open(null));
+		assertFalse(db.open(key, null));
 		assertEquals(CODE_SCHEMA_VERSION, getDataSchemaVersion(db));
 		db.close();
 	}
@@ -72,14 +75,14 @@ public abstract class DatabaseMigrationTest extends BrambleMockTestCase {
 			throws Exception {
 		// Open the DB for the first time
 		Database<Connection> db = createDatabase(asList(migration, migration1));
-		assertFalse(db.open(null));
+		assertFalse(db.open(key, null));
 		assertEquals(CODE_SCHEMA_VERSION, getDataSchemaVersion(db));
 		// Override the data schema version
 		setDataSchemaVersion(db, -1);
 		db.close();
 		// Reopen the DB - an exception should be thrown
 		db = createDatabase(asList(migration, migration1));
-		db.open(null);
+		db.open(key, null);
 	}
 
 	@Test
@@ -87,12 +90,12 @@ public abstract class DatabaseMigrationTest extends BrambleMockTestCase {
 			throws Exception {
 		// Open the DB for the first time
 		Database<Connection> db = createDatabase(asList(migration, migration1));
-		assertFalse(db.open(null));
+		assertFalse(db.open(key, null));
 		assertEquals(CODE_SCHEMA_VERSION, getDataSchemaVersion(db));
 		db.close();
 		// Reopen the DB - migrations should not be run
 		db = createDatabase(asList(migration, migration1));
-		assertTrue(db.open(null));
+		assertTrue(db.open(key, null));
 		assertEquals(CODE_SCHEMA_VERSION, getDataSchemaVersion(db));
 		db.close();
 	}
@@ -101,14 +104,14 @@ public abstract class DatabaseMigrationTest extends BrambleMockTestCase {
 	public void testThrowsExceptionIfDataIsNewerThanCode() throws Exception {
 		// Open the DB for the first time
 		Database<Connection> db = createDatabase(asList(migration, migration1));
-		assertFalse(db.open(null));
+		assertFalse(db.open(key, null));
 		assertEquals(CODE_SCHEMA_VERSION, getDataSchemaVersion(db));
 		// Override the data schema version
 		setDataSchemaVersion(db, CODE_SCHEMA_VERSION + 1);
 		db.close();
 		// Reopen the DB - an exception should be thrown
 		db = createDatabase(asList(migration, migration1));
-		db.open(null);
+		db.open(key, null);
 	}
 
 	@Test(expected = DataTooOldException.class)
@@ -116,13 +119,13 @@ public abstract class DatabaseMigrationTest extends BrambleMockTestCase {
 			throws Exception {
 		// Open the DB for the first time
 		Database<Connection> db = createDatabase(emptyList());
-		assertFalse(db.open(null));
+		assertFalse(db.open(key, null));
 		assertEquals(CODE_SCHEMA_VERSION, getDataSchemaVersion(db));
 		setDataSchemaVersion(db, CODE_SCHEMA_VERSION - 1);
 		db.close();
 		// Reopen the DB - an exception should be thrown
 		db = createDatabase(emptyList());
-		db.open(null);
+		db.open(key, null);
 	}
 
 	@Test(expected = DataTooOldException.class)
@@ -141,14 +144,14 @@ public abstract class DatabaseMigrationTest extends BrambleMockTestCase {
 
 		// Open the DB for the first time
 		Database<Connection> db = createDatabase(asList(migration, migration1));
-		assertFalse(db.open(null));
+		assertFalse(db.open(key, null));
 		assertEquals(CODE_SCHEMA_VERSION, getDataSchemaVersion(db));
 		// Override the data schema version
 		setDataSchemaVersion(db, CODE_SCHEMA_VERSION - 3);
 		db.close();
 		// Reopen the DB - an exception should be thrown
 		db = createDatabase(asList(migration, migration1));
-		db.open(null);
+		db.open(key, null);
 	}
 
 	@Test
@@ -170,14 +173,14 @@ public abstract class DatabaseMigrationTest extends BrambleMockTestCase {
 
 		// Open the DB for the first time
 		Database<Connection> db = createDatabase(asList(migration, migration1));
-		assertFalse(db.open(null));
+		assertFalse(db.open(key, null));
 		assertEquals(CODE_SCHEMA_VERSION, getDataSchemaVersion(db));
 		// Override the data schema version
 		setDataSchemaVersion(db, CODE_SCHEMA_VERSION - 2);
 		db.close();
 		// Reopen the DB - the first migration should be run
 		db = createDatabase(asList(migration, migration1));
-		assertTrue(db.open(null));
+		assertTrue(db.open(key, null));
 		assertEquals(CODE_SCHEMA_VERSION, getDataSchemaVersion(db));
 		db.close();
 	}
@@ -202,14 +205,14 @@ public abstract class DatabaseMigrationTest extends BrambleMockTestCase {
 
 		// Open the DB for the first time
 		Database<Connection> db = createDatabase(asList(migration, migration1));
-		assertFalse(db.open(null));
+		assertFalse(db.open(key, null));
 		assertEquals(CODE_SCHEMA_VERSION, getDataSchemaVersion(db));
 		// Override the data schema version
 		setDataSchemaVersion(db, CODE_SCHEMA_VERSION - 2);
 		db.close();
 		// Reopen the DB - both migrations should be run
 		db = createDatabase(asList(migration, migration1));
-		assertTrue(db.open(null));
+		assertTrue(db.open(key, null));
 		assertEquals(CODE_SCHEMA_VERSION, getDataSchemaVersion(db));
 		db.close();
 	}

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

@@ -15,6 +15,7 @@ import java.util.List;
 import static org.briarproject.bramble.test.TestUtils.deleteTestDirectory;
 import static org.briarproject.bramble.test.TestUtils.getMean;
 import static org.briarproject.bramble.test.TestUtils.getMedian;
+import static org.briarproject.bramble.test.TestUtils.getSecretKey;
 import static org.briarproject.bramble.test.TestUtils.getStandardDeviation;
 import static org.briarproject.bramble.test.UTest.Z_CRITICAL_0_01;
 
@@ -71,7 +72,7 @@ public abstract class DatabasePerformanceComparisonTest
 			throws DbException {
 		Database<Connection> db = createDatabase(conditionA,
 				new TestDatabaseConfig(testDir, MAX_SIZE), new SystemClock());
-		db.open(null);
+		db.open(getSecretKey(), null);
 		return db;
 	}
 

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

@@ -16,6 +16,7 @@ import java.sql.Connection;
 import javax.annotation.Nullable;
 
 import static org.briarproject.bramble.test.TestUtils.deleteTestDirectory;
+import static org.briarproject.bramble.test.TestUtils.getSecretKey;
 
 public abstract class DatabaseTraceTest extends DatabasePerformanceTest {
 
@@ -43,7 +44,7 @@ public abstract class DatabaseTraceTest extends DatabasePerformanceTest {
 	private Database<Connection> openDatabase() throws DbException {
 		Database<Connection> db = createDatabase(
 				new TestDatabaseConfig(testDir, MAX_SIZE), new SystemClock());
-		db.open(null);
+		db.open(getSecretKey(), null);
 		return db;
 	}
 

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

@@ -9,8 +9,8 @@ import java.util.List;
 public class H2MigrationTest extends DatabaseMigrationTest {
 
 	@Override
-	Database<Connection> createDatabase(List<Migration<Connection>> migrations)
-			throws Exception {
+	Database<Connection> createDatabase(
+			List<Migration<Connection>> migrations) {
 		return new H2Database(config, clock) {
 			@Override
 			List<Migration<Connection>> getMigrations() {

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

@@ -64,6 +64,7 @@ import static org.briarproject.bramble.test.TestUtils.getLocalAuthor;
 import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
 import static org.briarproject.bramble.test.TestUtils.getRandomId;
 import static org.briarproject.bramble.test.TestUtils.getSecretKey;
+import static org.briarproject.bramble.test.TestUtils.getTestDirectory;
 import static org.briarproject.bramble.test.TestUtils.getTransportId;
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
@@ -79,7 +80,8 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 	private static final int ONE_MEGABYTE = 1024 * 1024;
 	private static final int MAX_SIZE = 5 * ONE_MEGABYTE;
 
-	private final File testDir = TestUtils.getTestDirectory();
+	private final SecretKey key = getSecretKey();
+	private final File testDir = getTestDirectory();
 	private final GroupId groupId;
 	private final ClientId clientId;
 	private final int majorVersion;
@@ -96,7 +98,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 	private final KeySetId keySetId, keySetId1;
 	private final Random random = new Random();
 
-	JdbcDatabaseTest() throws Exception {
+	JdbcDatabaseTest() {
 		clientId = getClientId();
 		majorVersion = 123;
 		group = getGroup(clientId, majorVersion);
@@ -1819,7 +1821,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Database<Connection> db = createDatabase(
 				new TestDatabaseConfig(testDir, MAX_SIZE), clock);
 		if (!resume) TestUtils.deleteTestDirectory(testDir);
-		db.open(null);
+		db.open(key, null);
 		return db;
 	}
 

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

@@ -13,6 +13,7 @@ import java.util.List;
 import static org.briarproject.bramble.test.TestUtils.deleteTestDirectory;
 import static org.briarproject.bramble.test.TestUtils.getMean;
 import static org.briarproject.bramble.test.TestUtils.getMedian;
+import static org.briarproject.bramble.test.TestUtils.getSecretKey;
 import static org.briarproject.bramble.test.TestUtils.getStandardDeviation;
 
 public abstract class SingleDatabasePerformanceTest
@@ -40,7 +41,7 @@ public abstract class SingleDatabasePerformanceTest
 	private Database<Connection> openDatabase() throws DbException {
 		Database<Connection> db = createDatabase(
 				new TestDatabaseConfig(testDir, MAX_SIZE), new SystemClock());
-		db.open(null);
+		db.open(getSecretKey(), null);
 		return db;
 	}
 

bramble-core/src/test/java/org/briarproject/bramble/identity/IdentityManagerImplTest.java

@@ -2,15 +2,21 @@ package org.briarproject.bramble.identity;
 
 import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.crypto.CryptoComponent;
+import org.briarproject.bramble.api.crypto.KeyPair;
+import org.briarproject.bramble.api.crypto.PrivateKey;
+import org.briarproject.bramble.api.crypto.PublicKey;
 import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.identity.Author;
+import org.briarproject.bramble.api.identity.AuthorFactory;
 import org.briarproject.bramble.api.identity.AuthorId;
 import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.jmock.Expectations;
+import org.junit.Before;
 import org.junit.Test;
 
 import java.util.ArrayList;
@@ -27,24 +33,48 @@ import static org.junit.Assert.assertEquals;
 
 public class IdentityManagerImplTest extends BrambleMockTestCase {
 
-	private final IdentityManager identityManager;
 	private final DatabaseComponent db = context.mock(DatabaseComponent.class);
+	private final CryptoComponent crypto = context.mock(CryptoComponent.class);
+	private final AuthorFactory authorFactory =
+			context.mock(AuthorFactory.class);
+	private final PublicKey publicKey = context.mock(PublicKey.class);
+	private final PrivateKey privateKey = context.mock(PrivateKey.class);
+
 	private final Transaction txn = new Transaction(null, false);
 	private final LocalAuthor localAuthor = getLocalAuthor();
 	private final Collection<LocalAuthor> localAuthors =
 			Collections.singletonList(localAuthor);
+	private final String authorName = localAuthor.getName();
+	private final KeyPair keyPair = new KeyPair(publicKey, privateKey);
+	private final byte[] publicKeyBytes = localAuthor.getPublicKey();
+	private final byte[] privateKeyBytes = localAuthor.getPrivateKey();
+	private IdentityManager identityManager;
 
-	public IdentityManagerImplTest() {
-		identityManager = new IdentityManagerImpl(db);
+	@Before
+	public void setUp() {
+		identityManager = new IdentityManagerImpl(db, crypto, authorFactory);
 	}
 
 	@Test
-	public void testRegisterLocalAuthor() throws DbException {
-		expectRegisterLocalAuthor();
-		identityManager.registerLocalAuthor(localAuthor);
+	public void testCreateLocalAuthor() {
+		context.checking(new Expectations() {{
+			oneOf(crypto).generateSignatureKeyPair();
+			will(returnValue(keyPair));
+			oneOf(publicKey).getEncoded();
+			will(returnValue(publicKeyBytes));
+			oneOf(privateKey).getEncoded();
+			will(returnValue(privateKeyBytes));
+			oneOf(authorFactory).createLocalAuthor(authorName,
+					publicKeyBytes, privateKeyBytes);
+			will(returnValue(localAuthor));
+		}});
+
+		assertEquals(localAuthor,
+				identityManager.createLocalAuthor(authorName));
 	}
 
-	private void expectRegisterLocalAuthor() throws DbException {
+	@Test
+	public void testRegisterAndStoreLocalAuthor() throws DbException {
 		context.checking(new Expectations() {{
 			oneOf(db).startTransaction(false);
 			will(returnValue(txn));
@@ -52,6 +82,10 @@ public class IdentityManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).commitTransaction(txn);
 			oneOf(db).endTransaction(txn);
 		}});
+
+		identityManager.registerLocalAuthor(localAuthor);
+		assertEquals(localAuthor, identityManager.getLocalAuthor());
+		identityManager.storeLocalAuthor();
 	}
 
 	@Test
@@ -69,7 +103,6 @@ public class IdentityManagerImplTest extends BrambleMockTestCase {
 
 	@Test
 	public void testGetCachedLocalAuthor() throws DbException {
-		expectRegisterLocalAuthor();
 		identityManager.registerLocalAuthor(localAuthor);
 		assertEquals(localAuthor, identityManager.getLocalAuthor());
 	}

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

@@ -1,6 +1,5 @@
 package org.briarproject.bramble.test;
 
-import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
@@ -11,7 +10,6 @@ public class TestDatabaseConfig implements DatabaseConfig {
 
 	private final File dbDir, keyDir;
 	private final long maxSize;
-	private volatile SecretKey key = new SecretKey(new byte[SecretKey.LENGTH]);
 
 	public TestDatabaseConfig(File testDir, long maxSize) {
 		dbDir = new File(testDir, "db");
@@ -19,13 +17,6 @@ public class TestDatabaseConfig implements DatabaseConfig {
 		this.maxSize = maxSize;
 	}
 
-	@Override
-	public boolean databaseExists() {
-		if (!dbDir.isDirectory()) return false;
-		File[] files = dbDir.listFiles();
-		return files != null && files.length > 0;
-	}
-
 	@Override
 	public File getDatabaseDirectory() {
 		return dbDir;
@@ -36,26 +27,6 @@ public class TestDatabaseConfig implements DatabaseConfig {
 		return keyDir;
 	}
 
-	@Override
-	public void setEncryptionKey(SecretKey key) {
-		this.key = key;
-	}
-
-	@Override
-	public SecretKey getEncryptionKey() {
-		return key;
-	}
-
-	@Override
-	public void setLocalAuthorName(String nickname) {
-
-	}
-
-	@Override
-	public String getLocalAuthorName() {
-		return null;
-	}
-
 	@Override
 	public long getMaxSize() {
 		return maxSize;

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

@@ -1,5 +1,6 @@
 package org.briarproject.bramble.test;
 
+import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.lifecycle.IoExecutor;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.lifecycle.Service;
@@ -11,7 +12,6 @@ import java.util.concurrent.Executor;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
-import javax.annotation.Nullable;
 import javax.inject.Singleton;
 
 import dagger.Module;
@@ -40,7 +40,7 @@ public class TestLifecycleModule {
 			}
 
 			@Override
-			public StartResult startServices(@Nullable String nickname) {
+			public StartResult startServices(SecretKey dbKey) {
 				return StartResult.SUCCESS;
 			}
 
@@ -49,15 +49,15 @@ public class TestLifecycleModule {
 			}
 
 			@Override
-			public void waitForDatabase() throws InterruptedException {
+			public void waitForDatabase() {
 			}
 
 			@Override
-			public void waitForStartup() throws InterruptedException {
+			public void waitForStartup() {
 			}
 
 			@Override
-			public void waitForShutdown() throws InterruptedException {
+			public void waitForShutdown() {
 			}
 
 			@Override

bramble-j2se/src/main/java/org/briarproject/bramble/lifecycle/WindowsShutdownManagerImpl.java

@@ -28,6 +28,7 @@ import javax.annotation.concurrent.ThreadSafe;
 import static com.sun.jna.Library.OPTION_FUNCTION_MAPPER;
 import static com.sun.jna.Library.OPTION_TYPE_MAPPER;
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @ThreadSafe
 @NotNullByDefault
@@ -141,7 +142,7 @@ class WindowsShutdownManagerImpl extends ShutdownManagerImpl {
 					user32.DispatchMessage(msg);
 				}
 			} catch (UnsatisfiedLinkError e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 	}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/bluetooth/JavaBluetoothPlugin.java

@@ -19,6 +19,7 @@ import javax.microedition.io.StreamConnection;
 import javax.microedition.io.StreamConnectionNotifier;
 
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.StringUtils.isValidMac;
 
 @MethodsNotNullByDefault
@@ -85,7 +86,7 @@ class JavaBluetoothPlugin extends BluetoothPlugin<StreamConnectionNotifier> {
 		try {
 			if (ss != null) ss.close();
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/modem/ModemImpl.java

@@ -27,6 +27,7 @@ import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static jssc.SerialPort.PURGE_RXCLEAR;
 import static jssc.SerialPort.PURGE_TXCLEAR;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -136,7 +137,7 @@ class ModemImpl implements Modem, WriteHandler, SerialPortEventListener {
 		try {
 			if (port != null) port.closePort();
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -327,7 +328,7 @@ class ModemImpl implements Modem, WriteHandler, SerialPortEventListener {
 				}
 			}
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 		}
 	}
 
@@ -394,8 +395,7 @@ class ModemImpl implements Modem, WriteHandler, SerialPortEventListener {
 						try {
 							answer();
 						} catch (IOException e) {
-							if (LOG.isLoggable(WARNING))
-								LOG.log(WARNING, e.toString(), e);
+							logException(LOG, WARNING, e);
 						}
 					});
 				}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/modem/ModemPlugin.java

@@ -23,6 +23,7 @@ import java.util.logging.Logger;
 
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -81,7 +82,7 @@ class ModemPlugin implements DuplexPlugin, Modem.Callback {
 				running = true;
 				return;
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 		throw new PluginException();
@@ -94,7 +95,7 @@ class ModemPlugin implements DuplexPlugin, Modem.Callback {
 			try {
 				modem.stop();
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 	}
@@ -131,7 +132,7 @@ class ModemPlugin implements DuplexPlugin, Modem.Callback {
 					LOG.info("Initialised modem on " + portName);
 				return true;
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 			}
 		}
 		running = false;
@@ -157,7 +158,7 @@ class ModemPlugin implements DuplexPlugin, Modem.Callback {
 		try {
 			if (!modem.dial(number)) return null;
 		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			logException(LOG, WARNING, e);
 			resetModem();
 			return null;
 		}
@@ -209,7 +210,7 @@ class ModemPlugin implements DuplexPlugin, Modem.Callback {
 			try {
 				modem.hangUp();
 			} catch (IOException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				logException(LOG, WARNING, e);
 				exception = true;
 			}
 			if (exception) resetModem();

briar-android/.gitignore

@@ -5,3 +5,9 @@ local.properties
 .settings
 src/main/assets/*.zip
 src/main/res/values-iw
+
+# Fastlane Screenshots
+/fastlane/metadata/android/screenshots.html
+/fastlane/metadata/android/*/images
+/fastlane/report.xml
+/fastlane/README.md

briar-android/artwork/logo_horizontal_white.svg

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+     id="path57"
+     inkscape:connector-curvature="0" /><path
+     inkscape:connector-curvature="0"
+     style="fill:#87c214;stroke-width:0.21276595"
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+     id="path13-3" /><path
+     inkscape:connector-curvature="0"
+     style="fill:#95d220;stroke-width:0.21276595"
+     d="M 3.7657914,10.042387 C 1.7019617,10.042387 0,11.723487 0,13.808594 v 1.765708 c 0,2.063829 1.6806851,3.766206 3.7657914,3.766206 H 29.191323 v -9.298121 z m 37.6811826,0 v 9.298121 h 4.787233 c 2.06383,0 3.765792,-1.6811 3.765792,-3.766206 v -1.765708 c 0,-2.085107 -1.701962,-3.766207 -3.765792,-3.766207 z M 3.7657914,30.680684 C 1.7019617,30.680684 0,32.361784 0,34.44689 v 1.765709 c 0,2.06383 1.6806851,3.766206 3.7657914,3.766206 h 4.7872339 v -9.298121 z m 17.0428856,0 v 9.298121 h 25.42553 c 2.06383,0 3.765792,-1.702376 3.765792,-3.766206 V 34.44689 c 0,-2.085106 -1.701962,-3.766206 -3.765792,-3.766206 z"
+     id="path35" /></svg>

briar-android/artwork/notification_ongoing.svg

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Generator: Adobe Illustrator 19.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   id="Ebene_1"
+   x="0px"
+   y="0px"
+   viewBox="0 0 24 24"
+   xml:space="preserve"
+   inkscape:version="0.92.3 (2405546, 2018-03-11)"
+   sodipodi:docname="notification_ongoing.svg"
+   width="24"
+   height="24"><metadata
+     id="metadata61"><rdf:RDF><cc:Work
+         rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" /><dc:title /></cc:Work></rdf:RDF></metadata><defs
+     id="defs59" /><sodipodi:namedview
+     pagecolor="#000000"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1920"
+     inkscape:window-height="1020"
+     id="namedview57"
+     showgrid="false"
+     inkscape:zoom="11.466748"
+     inkscape:cx="-4.790356"
+     inkscape:cy="17.536496"
+     inkscape:window-x="1442"
+     inkscape:window-y="24"
+     inkscape:window-maximized="0"
+     inkscape:current-layer="Ebene_1"
+     units="px" /><style
+     type="text/css"
+     id="style3">
+	.st0{fill:#FFFFFF;}
+	.st1{display:none;fill:#87C214;}
+	.st2{fill:#87C214;}
+	.st3{display:none;fill:#FFFFFF;}
+	.st4{fill:#95D220;}
+	.st5{display:none;fill:#95D220;}
+</style><path
+     style="fill:#ffffff;stroke-width:0.07272727"
+     d="M 12,0 A 12,12 0 0 0 0,12 12,12 0 0 0 12,24 12,12 0 0 0 24,12 12,12 0 0 0 12,0 Z M 8.1454545,3.4764204 h 0.6036931 c 0.7054546,0 1.2872164,0.5817614 1.2872164,1.287216 V 6.4 H 6.8582386 V 4.7636364 c 0,-0.7054546 0.5817614,-1.287216 1.2872159,-1.287216 z m 7.0545455,0 h 0.603693 c 0.712727,0 1.287216,0.5817614 1.287216,1.287216 V 13.454545 H 13.912784 V 4.7636364 c 0,-0.7054546 0.581761,-1.287216 1.287216,-1.287216 z M 4.7127841,6.9090909 H 13.403693 V 10.087216 H 4.7127841 c -0.7127273,0 -1.287358,-0.5817618 -1.287358,-1.2872156 V 8.1963069 c 0,-0.7127273 0.5819034,-1.287216 1.287358,-1.287216 z m 12.8872159,0 h 1.636364 c 0.705454,0 1.279943,0.5817615 1.287216,1.287216 v 0.6036935 c 0,0.7127269 -0.581762,1.2872156 -1.287216,1.2872156 H 17.6 Z M 6.8582386,10.596307 h 3.1781254 v 8.690909 c 0,0.705454 -0.5817618,1.287358 -1.2872164,1.287358 H 8.1454545 c -0.7127272,0 -1.2872159,-0.581904 -1.2872159,-1.287358 z m -2.1454545,3.367329 h 1.6363636 v 3.178125 H 4.7127841 c -0.7127273,0 -1.287358,-0.581761 -1.287358,-1.287216 v -0.603693 c 0,-0.712727 0.5819034,-1.287216 1.287358,-1.287216 z m 5.8326709,0 h 8.690909 c 0.705454,0 1.279943,0.581761 1.287216,1.287216 v 0.603693 c 0,0.705455 -0.581762,1.287216 -1.287216,1.287216 h -8.690909 z m 3.367329,3.687216 h 3.178125 v 1.636364 c 0,0.705454 -0.581761,1.287358 -1.287216,1.287358 H 15.2 c -0.705455,0 -1.287216,-0.581904 -1.287216,-1.287358 z"
+     id="circle7"
+     inkscape:connector-curvature="0" /></svg>

briar-android/build.gradle

@@ -22,7 +22,7 @@ dependencies {
 	implementation "com.android.support:support-annotations:$supportVersion"
 	implementation 'com.android.support.constraint:constraint-layout:1.1.0'
 
-	implementation('ch.acra:acra:4.8.5') {
+	implementation('ch.acra:acra:4.9.1') {
 		exclude module: 'support-v4'
 		exclude module: 'support-annotations'
 	}
@@ -49,6 +49,16 @@ dependencies {
 	testImplementation "org.jmock:jmock-legacy:2.8.2"
 	testImplementation "org.hamcrest:hamcrest-library:1.3"
 	testImplementation "org.hamcrest:hamcrest-core:1.3"
+
+	def espressoVersion = '3.0.2'
+	androidTestImplementation "com.android.support.test.espresso:espresso-core:$espressoVersion"
+	androidTestImplementation "com.android.support.test.espresso:espresso-contrib:$espressoVersion"
+	androidTestImplementation "com.android.support.test.espresso:espresso-intents:$espressoVersion"
+	androidTestImplementation "tools.fastlane:screengrab:1.1.0"
+	androidTestImplementation "com.android.support.test.uiautomator:uiautomator-v18:2.1.3"
+	androidTestAnnotationProcessor "com.google.dagger:dagger-compiler:2.0.2"
+	androidTestCompileOnly 'javax.annotation:jsr250-api:1.0'
+	androidTestImplementation 'junit:junit:4.12'
 }
 
 dependencyVerification {
@@ -61,11 +71,19 @@ dependencyVerification {
 			'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:4.8.5:acra-4.8.5.aar:afd5b28934d5166b55f261c85685ad59e8a4ebe9ca1960906afaa8c76d8dc9eb',
+			'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',
@@ -82,35 +100,37 @@ dependencyVerification {
 			'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:26.1.2:protos-26.1.2.jar:52672a0b42b572a06aecc3535d5068eb46c0e15d129b9f1085d3c16a1da5cdbb',
-			'com.android.tools.analytics-library:shared:26.1.2:shared-26.1.2.jar:5c7e0eda18c6f87feeb83628c707e8aaa3298b41fb72e38efe31ad1675f9e8e9',
-			'com.android.tools.analytics-library:tracker:26.1.2:tracker-26.1.2.jar:06f97aa0adf44ffb06f8681c6a79d9be153a08f61d21eddc42b8d3db96df4282',
-			'com.android.tools.build:apksig:3.1.2:apksig-3.1.2.jar:40696a4559124d1d57873d208857eee059d48859239d569c7d18374ac644a8be',
-			'com.android.tools.build:builder-model:3.1.2:builder-model-3.1.2.jar:d49bfa2a135c9562b6ca7aa4342036cfa1582c7074c2d1d93d1dae8b3a134e17',
-			'com.android.tools.build:builder-test-api:3.1.2:builder-test-api-3.1.2.jar:dfe2a50b740d41b11189101062434d4283d18647e89a492ad51710c719363e9f',
-			'com.android.tools.build:builder:3.1.2:builder-3.1.2.jar:b60f825a42e2efe8433619fbc759f3d9effecab718279048d36881188ceb1d14',
-			'com.android.tools.build:gradle-api:3.1.2:gradle-api-3.1.2.jar:e58bcc5b893e4583ab0f5c8ef89c4dbcce202b405a9d7fcc116d21e5357d4893',
-			'com.android.tools.build:manifest-merger:26.1.2:manifest-merger-26.1.2.jar:9c61c27ea5266573107b954acf1216d398f4d7e7ae6fad6409d6b2b767eb091c',
-			'com.android.tools.ddms:ddmlib:26.1.2:ddmlib-26.1.2.jar:18a2a5fbef36882f07d03c2b9e59eba05cf8248177bf5cbff736e4b582804c44',
-			'com.android.tools.external.com-intellij:intellij-core:26.1.2:intellij-core-26.1.2.jar:37c5acf279f1ae3e85b1a5be3c9f15f43bde7b08f978eefefffb9c4035760c52',
-			'com.android.tools.external.com-intellij:kotlin-compiler:26.1.2:kotlin-compiler-26.1.2.jar:152df0bee7580326c77316b669a9d96e3b09efb1d45f545dce4147271b0b8944',
-			'com.android.tools.external.org-jetbrains:uast:26.1.2:uast-26.1.2.jar:02d39582206d3f5fc0a6cb18bfd9e8b9f9c1acb805ec6dac08b4e3a56849d279',
-			'com.android.tools.layoutlib:layoutlib-api:26.1.2:layoutlib-api-26.1.2.jar:20220039fcc7d799f928153beff862e704457c0f55ab44258f3745ebeb662b4f',
-			'com.android.tools.lint:lint-api:26.1.2:lint-api-26.1.2.jar:e1d5b62b870a7c566e9877a6b96b27784a4d713f8caa07fdcb4705d47a40a1d9',
-			'com.android.tools.lint:lint-checks:26.1.2:lint-checks-26.1.2.jar:211e2afd58504372385d71b1e5be982c2b5121ab6fee1c04ddabeb75a8729e07',
-			'com.android.tools.lint:lint-gradle-api:26.1.2:lint-gradle-api-26.1.2.jar:71284f2a8b03c3e55c94511c9eb36f8184fbb85324325fc6b78abf5183f03d90',
-			'com.android.tools.lint:lint-gradle:26.1.2:lint-gradle-26.1.2.jar:855f0c82b7fc690df1b7319c0774f7517f7f8f5dd4eee1f6077dcf50e07c6240',
-			'com.android.tools.lint:lint-kotlin:26.1.2:lint-kotlin-26.1.2.jar:1e591f70bcbbc11569720a9bbcca2bc1f3d4f789f01f40f642848d920643d484',
-			'com.android.tools.lint:lint:26.1.2:lint-26.1.2.jar:93736c62e9f1976998c2b4aa716aea0734cdb162d05502f4af7292654aedb182',
-			'com.android.tools:annotations:26.1.2:annotations-26.1.2.jar:72773dcaf5c4ccca828e3c8467f1b78a8a00b3cc5f8ad1aab88fcf9379928018',
-			'com.android.tools:common:26.1.2:common-26.1.2.jar:ea4320f0c17dcbc4491896bb705c4d25ec08bd62ef02ab0579fe154e75e788e6',
-			'com.android.tools:dvlib:26.1.2:dvlib-26.1.2.jar:1187aa4fb666595c96c4deb6bc0e0f4b7e396bde9f6243330b49a232946130ea',
-			'com.android.tools:repository:26.1.2:repository-26.1.2.jar:8b86e512ad6d32bd76989451eefe2b271f5efce6d4d65ecb173afaf14606e01a',
-			'com.android.tools:sdk-common:26.1.2:sdk-common-26.1.2.jar:23584720a60a21cdcb5b1ec10269e3013789d6805d153cc696c39ec7ce251896',
-			'com.android.tools:sdklib:26.1.2:sdklib-26.1.2.jar:d3870fafc59ab8efa70d3f9649f40ee299c8ec5b58377b06e8853d7272a5bf4e',
+			'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',
@@ -127,6 +147,7 @@ dependencyVerification {
 			'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',
@@ -181,6 +202,7 @@ dependencyVerification {
 			'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',
@@ -212,6 +234,7 @@ dependencyVerification {
 			'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',
@@ -238,33 +261,48 @@ android {
 	defaultConfig {
 		minSdkVersion 14
 		targetSdkVersion 26
-		versionCode 10009
-		versionName "1.0.9"
+		versionCode 10013
+		versionName "1.0.13"
 		applicationId "org.briarproject.briar.android"
-		resValue "string", "app_package", "org.briarproject.briar.android"
-		resValue "string", "app_name", "Briar"
 		buildConfigField "String", "GitHash",
 				"\"${getStdout(['git', 'rev-parse', '--short=7', 'HEAD'], 'No commit hash')}\""
 		def now = (long) (System.currentTimeMillis() / 1000)
 		buildConfigField "Long", "BuildTimestamp",
 				"${getStdout(['git', 'log', '-n', '1', '--format=%ct'], now)}000L"
+		testInstrumentationRunner 'org.briarproject.briar.android.test.BriarTestRunner'
 	}
 
 	buildTypes {
 		debug {
 			applicationIdSuffix ".debug"
-			resValue "string", "app_package", "org.briarproject.briar.android.debug"
-			resValue "string", "app_name", "Briar Debug"
+			shrinkResources false
+			minifyEnabled true
+			crunchPngs false
+			proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
+			testProguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt', 'proguard-test.txt'
+		}
+		release {
 			shrinkResources false
 			minifyEnabled true
 			crunchPngs false
 			proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
 		}
-		release {
-			shrinkResources true
-			minifyEnabled true
-			crunchPngs false
-			proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
+	}
+
+	flavorDimensions "version"
+	productFlavors {
+		screenshot {
+			dimension "version"
+			minSdkVersion 18
+			applicationIdSuffix ".screenshot" // = org.briarproject.briar.android.screenshot.debug
+		}
+		main {
+			dimension "version"
+		}
+	}
+	variantFilter { variant ->
+		if (variant.flavors*.name.contains("screenshot") && variant.buildType.name == "release") {
+			setIgnore(true)
 		}
 	}
 
@@ -288,14 +326,14 @@ android {
 
 task verifyTranslations {
 	doLast {
-		def file = "briar-android/src/main/res/values/arrays.xml"
+		def file = project.file("src/main/res/values/arrays.xml")
 		def arrays = new XmlParser().parse(file)
 		def lc = arrays.children().find { it.@name == "pref_language_values" }
 		def translations = []
 		lc.children().each { value -> translations.add(value.text()) }
 
 		def folders = ["default", "en-US"]
-		new File("briar-android/src/main/res").eachDir { dir ->
+		project.file("src/main/res").eachDir { dir ->
 			if (dir.name.startsWith("values-") && !dir.name.endsWith("night")) {
 				folders.add(dir.name.substring(7).replace("-r", "-"))
 			}
@@ -310,14 +348,14 @@ task verifyTranslations {
 					+ "\nhave no matching value folder")
 
 		// Some devices use iw instead of he for hebrew
-		def hebrew_legacy = new File("briar-android/src/main/res/values-iw")
-		def hebrew = new File("briar-android/src/main/res/values-he")
+		def hebrew_legacy = project.file("src/main/res/values-iw")
+		def hebrew = project.file("src/main/res/values-he")
 		// Copy values-he to values-iw
 		if (hebrew.exists()) {
 			hebrew_legacy.mkdir()
 			copy {
-				from 'src/main/res/values-he'
-				into 'src/main/res/values-iw'
+				from hebrew.getAbsolutePath()
+				into hebrew_legacy.getAbsolutePath()
 			}
 		}
 	}