Pause between connection attempts.

.gitignore

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

.gitlab-ci.yml

@@ -11,8 +11,8 @@ test:
       - .gradle/caches
 
   script:
-    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom animalSnifferMain animalSnifferTest
-    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom test
+    - ./gradlew --no-daemon animalSnifferMain animalSnifferTest
+    - ./gradlew --no-daemon test
 
   after_script:
     # these file change every time but should not be cached
@@ -21,7 +21,11 @@ test:
 
 
 test_reproducible:
+  image: briar/reproducer:latest
+
   script:
-    - "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"
+    - cd /opt/briar-reproducer
+    - ./reproduce.py ${CI_COMMIT_REF_NAME}
+
   only:
     - tags

.idea/codeStyles/Project.xml

@@ -36,9 +36,6 @@
       <option name="JD_ALIGN_PARAM_COMMENTS" value="false" />
       <option name="JD_ALIGN_EXCEPTION_COMMENTS" value="false" />
     </JavaCodeStyleSettings>
-    <JetCodeStyleSettings>
-      <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
-    </JetCodeStyleSettings>
     <Objective-C-extensions>
       <file>
         <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Import" />
@@ -260,11 +257,5 @@
         </rules>
       </arrangement>
     </codeStyleSettings>
-    <codeStyleSettings language="kotlin">
-      <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
-      <option name="PARAMETER_ANNOTATION_WRAP" value="1" />
-      <option name="VARIABLE_ANNOTATION_WRAP" value="1" />
-      <option name="ENUM_CONSTANTS_WRAP" value="1" />
-    </codeStyleSettings>
   </code_scheme>
 </component>

.idea/runConfigurations/All_in_briar_headless.xml

@@ -1,20 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All in briar-headless" type="AndroidJUnit" factoryName="Android JUnit" nameIsGenerated="true">
-    <module name="briar-headless" />
-    <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="" />
-    <option name="PARAMETERS" value="" />
-    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/briar-headless" />
-    <option name="PASS_PARENT_ENVS" value="true" />
-    <option name="TEST_SEARCH_SCOPE">
-      <value defaultName="singleModule" />
-    </option>
-    <patterns />
-    <method />
-  </configuration>
-</component>

.idea/runConfigurations/All_tests.xml

@@ -21,10 +21,8 @@
     <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-java" run_configuration_type="AndroidJUnit" />
+      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-j2se" run_configuration_type="AndroidJUnit" />
       <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in briar-core" run_configuration_type="AndroidJUnit" />
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All in briar-headless" run_configuration_type="AndroidJUnit" />
     </method>
   </configuration>
 </component>

.idea/runConfigurations/All_tests_in_bramble_android.xml

@@ -1,20 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in bramble-android" type="AndroidJUnit" factoryName="Android JUnit">
-    <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="PASS_PARENT_ENVS" value="true" />
-    <option name="TEST_SEARCH_SCOPE">
-      <value defaultName="singleModule" />
-    </option>
-    <patterns />
-    <method />
-  </configuration>
-</component>

.idea/runConfigurations/All_tests_in_bramble_api.xml

@@ -1,5 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="All tests in bramble-api" type="AndroidJUnit" factoryName="Android JUnit">
+    <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
     <module name="bramble-api" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
     <option name="ALTERNATIVE_JRE_PATH" />
@@ -10,10 +11,12 @@
     <option name="VM_PARAMETERS" value="-ea" />
     <option name="PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-api" />
+    <option name="ENV_VARIABLES" />
     <option name="PASS_PARENT_ENVS" value="true" />
     <option name="TEST_SEARCH_SCOPE">
       <value defaultName="singleModule" />
     </option>
+    <envs />
     <patterns />
     <method />
   </configuration>

.idea/runConfigurations/All_tests_in_bramble_core.xml

@@ -1,5 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="All tests in bramble-core" type="AndroidJUnit" factoryName="Android JUnit">
+    <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
     <module name="bramble-core" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
     <option name="ALTERNATIVE_JRE_PATH" />
@@ -10,10 +11,12 @@
     <option name="VM_PARAMETERS" value="-ea" />
     <option name="PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-core" />
+    <option name="ENV_VARIABLES" />
     <option name="PASS_PARENT_ENVS" value="true" />
     <option name="TEST_SEARCH_SCOPE">
       <value defaultName="singleModule" />
     </option>
+    <envs />
     <patterns />
     <method />
   </configuration>

.idea/runConfigurations/All_tests_in_bramble_j2se.xml

@@ -1,6 +1,7 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in bramble-java" type="AndroidJUnit" factoryName="Android JUnit">
-    <module name="bramble-java" />
+  <configuration default="false" name="All tests in bramble-j2se" type="AndroidJUnit" factoryName="Android JUnit">
+    <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
+    <module name="bramble-j2se" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
     <option name="ALTERNATIVE_JRE_PATH" />
     <option name="PACKAGE_NAME" value="" />
@@ -9,11 +10,13 @@
     <option name="TEST_OBJECT" value="package" />
     <option name="VM_PARAMETERS" value="-ea -Djava.library.path=libs" />
     <option name="PARAMETERS" value="" />
-    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-java" />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-j2se" />
+    <option name="ENV_VARIABLES" />
     <option name="PASS_PARENT_ENVS" value="true" />
     <option name="TEST_SEARCH_SCOPE">
       <value defaultName="singleModule" />
     </option>
+    <envs />
     <patterns />
     <method />
   </configuration>

.idea/runConfigurations/All_tests_in_briar_android.xml

@@ -1,5 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="All tests in briar-android" type="AndroidJUnit" factoryName="Android JUnit">
+    <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
     <module name="briar-android" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
     <option name="ALTERNATIVE_JRE_PATH" />
@@ -10,10 +11,12 @@
     <option name="VM_PARAMETERS" value="-ea" />
     <option name="PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/briar-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>

.idea/runConfigurations/All_tests_in_briar_core.xml

@@ -1,5 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="All tests in briar-core" type="AndroidJUnit" factoryName="Android JUnit">
+    <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
     <module name="briar-core" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
     <option name="ALTERNATIVE_JRE_PATH" />
@@ -10,10 +11,12 @@
     <option name="VM_PARAMETERS" value="-ea" />
     <option name="PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/briar-core" />
+    <option name="ENV_VARIABLES" />
     <option name="PASS_PARENT_ENVS" value="true" />
     <option name="TEST_SEARCH_SCOPE">
       <value defaultName="singleModule" />
     </option>
+    <envs />
     <patterns />
     <method />
   </configuration>

.idea/runConfigurations/H2_Performance_Test.xml

@@ -1,5 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="H2 Performance Test" type="AndroidJUnit" factoryName="Android JUnit">
+    <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
     <module name="bramble-core" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
     <option name="ALTERNATIVE_JRE_PATH" />
@@ -10,10 +11,12 @@
     <option name="VM_PARAMETERS" value="-ea" />
     <option name="PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="" />
+    <option name="ENV_VARIABLES" />
     <option name="PASS_PARENT_ENVS" value="true" />
     <option name="TEST_SEARCH_SCOPE">
       <value defaultName="singleModule" />
     </option>
+    <envs />
     <patterns />
     <method />
   </configuration>

.idea/runConfigurations/HyperSQL_Performance_Test.xml

@@ -1,5 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="HyperSQL Performance Test" type="AndroidJUnit" factoryName="Android JUnit">
+    <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
     <module name="bramble-core" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
     <option name="ALTERNATIVE_JRE_PATH" />
@@ -10,10 +11,12 @@
     <option name="VM_PARAMETERS" value="-ea" />
     <option name="PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="" />
+    <option name="ENV_VARIABLES" />
     <option name="PASS_PARENT_ENVS" value="true" />
     <option name="TEST_SEARCH_SCOPE">
       <value defaultName="singleModule" />
     </option>
+    <envs />
     <patterns />
     <method />
   </configuration>

.idea/runConfigurations/briar_headless.xml

@@ -1,17 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="briar-headless" type="JetRunConfigurationType" factoryName="Kotlin" singleton="true">
-    <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
-    <option name="VM_PARAMETERS" value="" />
-    <option name="PROGRAM_PARAMETERS" value="-v" />
-    <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-    <option name="ALTERNATIVE_JRE_PATH" />
-    <option name="PASS_PARENT_ENVS" value="true" />
-    <option name="MAIN_CLASS_NAME" value="org.briarproject.briar.headless.MainKt" />
-    <option name="WORKING_DIRECTORY" value="" />
-    <module name="briar-headless" />
-    <envs />
-    <method>
-      <option name="Gradle.BeforeRunTask" enabled="true" tasks="jar" externalProjectPath="$PROJECT_DIR$/briar-headless" vmOptions="" scriptParameters="" />
-    </method>
-  </configuration>
-</component>

bramble-android/build.gradle

@@ -1,19 +1,16 @@
 apply plugin: 'com.android.library'
 apply plugin: 'witness'
-apply from: 'witness.gradle'
 
 android {
-	compileSdkVersion 28
-	buildToolsVersion '28.0.3'
+	compileSdkVersion 27
+	buildToolsVersion '27.0.3'
 
 	defaultConfig {
 		minSdkVersion 14
 		targetSdkVersion 26
-		versionCode 10103
-		versionName "1.1.3"
+		versionCode 10005
+		versionName "1.0.5"
 		consumerProguardFiles 'proguard-rules.txt'
-
-		testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 	}
 
 	compileOptions {
@@ -28,19 +25,92 @@ configurations {
 
 dependencies {
 	implementation project(path: ':bramble-core', configuration: 'default')
-	tor 'org.briarproject:tor-android:0.3.4.8@zip'
+	implementation 'org.briarproject:jtorctl:0.3'
+	tor 'org.briarproject:tor-android:0.2.9.15@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"
+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',
+			'com.google.code.findbugs:jsr305:1.3.9:jsr305-1.3.9.jar:905721a0eea90a81534abb7ee6ef4ea2e5e645fa1def0a5cd88402df1b46c9ed',
+			'com.google.code.gson:gson:2.7:gson-2.7.jar:2d43eb5ea9e133d2ee2405cc14f5ee08951b8361302fdd93494a3a997b508d32',
+			'com.google.dagger:dagger-compiler:2.0.2:dagger-compiler-2.0.2.jar:b74bc9de063dd4c6400b232231f2ef5056145b8fbecbf5382012007dd1c071b3',
+			'com.google.dagger:dagger-producers:2.0-beta:dagger-producers-2.0-beta.jar:99ec15e8a0507ba569e7655bc1165ee5e5ca5aa914b3c8f7e2c2458f724edd6b',
+			'com.google.dagger:dagger:2.0.2:dagger-2.0.2.jar:84c0282ed8be73a29e0475d639da030b55dee72369e58dd35ae7d4fe6243dcf9',
+			'com.google.errorprone:error_prone_annotations:2.0.18:error_prone_annotations-2.0.18.jar:cb4cfad870bf563a07199f3ebea5763f0dec440fcda0b318640b1feaa788656b',
+			'com.google.guava:guava:18.0:guava-18.0.jar:d664fbfc03d2e5ce9cab2a44fb01f1d0bf9dfebeccc1a473b1f9ea31f79f6f99',
+			'com.google.guava:guava:22.0:guava-22.0.jar:1158e94c7de4da480873f0b4ab4a1da14c0d23d4b1902cc94a58a6f0f9ab579e',
+			'com.google.j2objc:j2objc-annotations:1.1:j2objc-annotations-1.1.jar:40ceb7157feb263949e0f503fe5f71689333a621021aa20ce0d0acee3badaa0f',
+			'com.google.jimfs:jimfs:1.1:jimfs-1.1.jar:c4828e28d7c0a930af9387510b3bada7daa5c04d7c25a75c7b8b081f1c257ddd',
+			'com.google.protobuf:protobuf-java:3.4.0:protobuf-java-3.4.0.jar:dce7e66b32456a1b1198da0caff3a8acb71548658391e798c79369241e6490a4',
+			'com.googlecode.json-simple:json-simple:1.1:json-simple-1.1.jar:2d9484f4c649f708f47f9a479465fc729770ee65617dca3011836602264f6439',
+			'com.squareup:javawriter:2.5.0:javawriter-2.5.0.jar:fcfb09fb0ea0aa97d3cfe7ea792398081348e468f126b3603cb3803f240197f0',
+			'com.sun.activation:javax.activation:1.2.0:javax.activation-1.2.0.jar:993302b16cd7056f21e779cc577d175a810bb4900ef73cd8fbf2b50f928ba9ce',
+			'com.sun.istack:istack-commons-runtime:2.21:istack-commons-runtime-2.21.jar:c33e67a0807095f02a0e2da139412dd7c4f9cc1a4c054b3e434f96831ba950f4',
+			'com.sun.xml.fastinfoset:FastInfoset:1.2.13:FastInfoset-1.2.13.jar:27a77db909f3c2833c0b1a37c55af1db06045118ad2eed96ce567b6632bce038',
+			'commons-codec:commons-codec:1.6:commons-codec-1.6.jar:54b34e941b8e1414bd3e40d736efd3481772dc26db3296f6aa45cec9f6203d86',
+			'commons-logging:commons-logging:1.1.1:commons-logging-1.1.1.jar:ce6f913cad1f0db3aad70186d65c5bc7ffcc9a99e3fe8e0b137312819f7c362f',
+			'it.unimi.dsi:fastutil:7.2.0:fastutil-7.2.0.jar:74fa208043740642f7e6eb09faba15965218ad2f50ce3020efb100136e4b591c',
+			'javax.annotation:jsr250-api:1.0:jsr250-api-1.0.jar:a1a922d0d9b6d183ed3800dfac01d1e1eb159f0e8c6f94736931c1def54a941f',
+			'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
+			'javax.xml.bind:jaxb-api:2.2.12-b140109.1041:jaxb-api-2.2.12-b140109.1041.jar:b5e60cd8b7b5ff01ce4a74c5dd008f4fbd14ced3495d0b47b85cfedc182211f2',
+			'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.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.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.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.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.jvnet.staxex:stax-ex:1.7.7:stax-ex-1.7.7.jar:a31ff7d77163c0deb09e7fee59ad35ae44c2cee2cc8552a116ccd1583d813fb4',
+			'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:5.1:asm-5.1.jar:d2da399a9967c69f0a21739256fa79d284222c223082cacadc17372244764b54',
+	]
 }
 
 project.afterEvaluate {

bramble-android/src/main/AndroidManifest.xml

@@ -2,13 +2,14 @@
 	package="org.briarproject.bramble"
 	xmlns:android="http://schemas.android.com/apk/res/android">
 
-	<uses-feature android:name="android.hardware.bluetooth" android:required="false"/>
+	<uses-feature android:name="android.hardware.bluetooth"/>
 
 	<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

@@ -1,16 +1,11 @@
 package org.briarproject.bramble;
 
-import org.briarproject.bramble.network.AndroidNetworkModule;
-import org.briarproject.bramble.plugin.tor.CircumventionModule;
 import org.briarproject.bramble.system.AndroidSystemModule;
 
 import dagger.Module;
 
 @Module(includes = {
-		AndroidNetworkModule.class,
-		AndroidSystemModule.class,
-		CircumventionModule.class
+		AndroidSystemModule.class
 })
 public class BrambleAndroidModule {
-
 }

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

@@ -1,108 +0,0 @@
-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

@@ -1,142 +0,0 @@
-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);
-		if (cm == null) throw new AssertionError();
-		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

@@ -1,21 +0,0 @@
-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

@@ -16,27 +16,18 @@ import org.briarproject.bramble.api.plugin.PluginException;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginCallback;
 import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
 import org.briarproject.bramble.api.system.AndroidExecutor;
-import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.util.AndroidUtils;
 
 import java.io.Closeable;
 import java.io.IOException;
 import java.security.SecureRandom;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.List;
 import java.util.UUID;
-import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Executor;
-import java.util.concurrent.LinkedBlockingQueue;
 import java.util.logging.Logger;
 
 import javax.annotation.Nullable;
 
-import static android.bluetooth.BluetoothAdapter.ACTION_DISCOVERY_FINISHED;
-import static android.bluetooth.BluetoothAdapter.ACTION_DISCOVERY_STARTED;
 import static android.bluetooth.BluetoothAdapter.ACTION_SCAN_MODE_CHANGED;
 import static android.bluetooth.BluetoothAdapter.ACTION_STATE_CHANGED;
 import static android.bluetooth.BluetoothAdapter.EXTRA_SCAN_MODE;
@@ -46,13 +37,7 @@ import static android.bluetooth.BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERA
 import static android.bluetooth.BluetoothAdapter.SCAN_MODE_NONE;
 import static android.bluetooth.BluetoothAdapter.STATE_OFF;
 import static android.bluetooth.BluetoothAdapter.STATE_ON;
-import static android.bluetooth.BluetoothDevice.ACTION_FOUND;
-import static android.bluetooth.BluetoothDevice.EXTRA_DEVICE;
-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;
-import static org.briarproject.bramble.util.PrivacyUtils.scrubMacAddress;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -61,11 +46,8 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
 	private static final Logger LOG =
 			Logger.getLogger(AndroidBluetoothPlugin.class.getName());
 
-	private static final int MAX_DISCOVERY_MS = 10_000;
-
 	private final AndroidExecutor androidExecutor;
 	private final Context appContext;
-	private final Clock clock;
 
 	private volatile boolean wasEnabledByUs = false;
 	private volatile BluetoothStateReceiver receiver = null;
@@ -75,13 +57,12 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
 
 	AndroidBluetoothPlugin(BluetoothConnectionLimiter connectionLimiter,
 			Executor ioExecutor, AndroidExecutor androidExecutor,
-			Context appContext, SecureRandom secureRandom, Clock clock,
-			Backoff backoff, DuplexPluginCallback callback, int maxLatency) {
+			Context appContext, SecureRandom secureRandom, Backoff backoff,
+			DuplexPluginCallback callback, int maxLatency) {
 		super(connectionLimiter, ioExecutor, secureRandom, backoff, callback,
 				maxLatency);
 		this.androidExecutor = androidExecutor;
 		this.appContext = appContext;
-		this.clock = clock;
 	}
 
 	@Override
@@ -164,7 +145,7 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
 		try {
 			if (ss != null) ss.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -200,79 +181,11 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
 		}
 	}
 
-	@Override
-	@Nullable
-	DuplexTransportConnection discoverAndConnect(String uuid) {
-		if (adapter == null) return null;
-		for (String address : discoverDevices()) {
-			try {
-				if (LOG.isLoggable(INFO))
-					LOG.info("Connecting to " + scrubMacAddress(address));
-				return connectTo(address, uuid);
-			} catch (IOException e) {
-				if (LOG.isLoggable(INFO)) {
-					LOG.info("Could not connect to "
-							+ scrubMacAddress(address));
-				}
-			}
-		}
-		LOG.info("Could not connect to any devices");
-		return null;
-	}
-
-	private Collection<String> discoverDevices() {
-		List<String> addresses = new ArrayList<>();
-		BlockingQueue<Intent> intents = new LinkedBlockingQueue<>();
-		DiscoveryReceiver receiver = new DiscoveryReceiver(intents);
-		IntentFilter filter = new IntentFilter();
-		filter.addAction(ACTION_DISCOVERY_STARTED);
-		filter.addAction(ACTION_DISCOVERY_FINISHED);
-		filter.addAction(ACTION_FOUND);
-		appContext.registerReceiver(receiver, filter);
-		try {
-			if (adapter.startDiscovery()) {
-				long now = clock.currentTimeMillis();
-				long end = now + MAX_DISCOVERY_MS;
-				while (now < end) {
-					Intent i = intents.poll(end - now, MILLISECONDS);
-					if (i == null) break;
-					String action = i.getAction();
-					if (ACTION_DISCOVERY_STARTED.equals(action)) {
-						LOG.info("Discovery started");
-					} else if (ACTION_DISCOVERY_FINISHED.equals(action)) {
-						LOG.info("Discovery finished");
-						break;
-					} else if (ACTION_FOUND.equals(action)) {
-						BluetoothDevice d = i.getParcelableExtra(EXTRA_DEVICE);
-						String address = d.getAddress();
-						if (LOG.isLoggable(INFO))
-							LOG.info("Discovered " + scrubMacAddress(address));
-						if (!addresses.contains(address))
-							addresses.add(address);
-					}
-					now = clock.currentTimeMillis();
-				}
-			} else {
-				LOG.info("Could not start discovery");
-			}
-		} catch (InterruptedException e) {
-			LOG.info("Interrupted while discovering devices");
-			Thread.currentThread().interrupt();
-		} finally {
-			LOG.info("Cancelling discovery");
-			adapter.cancelDiscovery();
-			appContext.unregisterReceiver(receiver);
-		}
-		// Shuffle the addresses so we don't always try the same one first
-		Collections.shuffle(addresses);
-		return addresses;
-	}
-
 	private void tryToClose(@Nullable Closeable c) {
 		try {
 			if (c != null) c.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -293,18 +206,4 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
 			}
 		}
 	}
-
-	private static class DiscoveryReceiver extends BroadcastReceiver {
-
-		private final BlockingQueue<Intent> intents;
-
-		private DiscoveryReceiver(BlockingQueue<Intent> intents) {
-			this.intents = intents;
-		}
-
-		@Override
-		public void onReceive(Context ctx, Intent intent) {
-			intents.add(intent);
-		}
-	}
 }

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

@@ -11,7 +11,6 @@ import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginCallback;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
 import org.briarproject.bramble.api.system.AndroidExecutor;
-import org.briarproject.bramble.api.system.Clock;
 
 import java.security.SecureRandom;
 import java.util.concurrent.Executor;
@@ -34,19 +33,17 @@ public class AndroidBluetoothPluginFactory implements DuplexPluginFactory {
 	private final Context appContext;
 	private final SecureRandom secureRandom;
 	private final EventBus eventBus;
-	private final Clock clock;
 	private final BackoffFactory backoffFactory;
 
 	public AndroidBluetoothPluginFactory(Executor ioExecutor,
 			AndroidExecutor androidExecutor, Context appContext,
-			SecureRandom secureRandom, EventBus eventBus, Clock clock,
+			SecureRandom secureRandom, EventBus eventBus,
 			BackoffFactory backoffFactory) {
 		this.ioExecutor = ioExecutor;
 		this.androidExecutor = androidExecutor;
 		this.appContext = appContext;
 		this.secureRandom = secureRandom;
 		this.eventBus = eventBus;
-		this.clock = clock;
 		this.backoffFactory = backoffFactory;
 	}
 
@@ -68,7 +65,7 @@ public class AndroidBluetoothPluginFactory implements DuplexPluginFactory {
 				MAX_POLLING_INTERVAL, BACKOFF_BASE);
 		AndroidBluetoothPlugin plugin = new AndroidBluetoothPlugin(
 				connectionLimiter, ioExecutor, androidExecutor, appContext,
-				secureRandom, clock, backoff, callback, MAX_LATENCY);
+				secureRandom, backoff, callback, MAX_LATENCY);
 		eventBus.addListener(plugin);
 		return plugin;
 	}

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

@@ -1,16 +1,15 @@
 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;
@@ -21,6 +20,7 @@ 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;
@@ -28,13 +28,21 @@ 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 implements EventListener {
+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;
 
 	private static final byte[] WIFI_AP_ADDRESS_BYTES =
 			{(byte) 192, (byte) 168, 43, 1};
@@ -52,20 +60,22 @@ class AndroidLanTcpPlugin extends LanTcpPlugin implements EventListener {
 		}
 	}
 
-	private final Executor connectionStatusExecutor;
+	private final ScheduledExecutorService scheduler;
+	private final Context appContext;
 	private final ConnectivityManager connectivityManager;
 	@Nullable
 	private final WifiManager wifiManager;
 
+	@Nullable
+	private volatile BroadcastReceiver networkStateReceiver = null;
 	private volatile SocketFactory socketFactory;
 
-	AndroidLanTcpPlugin(Executor ioExecutor, Context appContext,
-			Backoff backoff, DuplexPluginCallback callback, int maxLatency,
-			int maxIdleTime) {
+	AndroidLanTcpPlugin(Executor ioExecutor, ScheduledExecutorService scheduler,
+			Backoff backoff, Context appContext, DuplexPluginCallback callback,
+			int maxLatency, int maxIdleTime) {
 		super(ioExecutor, backoff, callback, maxLatency, maxIdleTime);
-		// Don't execute more than one connection status check at a time
-		connectionStatusExecutor =
-				new PoliteExecutor("AndroidLanTcpPlugin", ioExecutor, 1);
+		this.scheduler = scheduler;
+		this.appContext = appContext;
 		ConnectivityManager connectivityManager = (ConnectivityManager)
 				appContext.getSystemService(CONNECTIVITY_SERVICE);
 		if (connectivityManager == null) throw new AssertionError();
@@ -79,12 +89,19 @@ class AndroidLanTcpPlugin extends LanTcpPlugin implements EventListener {
 	public void start() {
 		if (used.getAndSet(true)) throw new IllegalStateException();
 		running = true;
-		updateConnectionStatus();
+		// 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);
 	}
 
 	@Override
 	public void stop() {
 		running = false;
+		if (networkStateReceiver != null)
+			appContext.unregisterReceiver(networkStateReceiver);
 		tryToClose(socket);
 	}
 
@@ -103,7 +120,7 @@ class AndroidLanTcpPlugin extends LanTcpPlugin implements EventListener {
 			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();
 	}
@@ -135,13 +152,21 @@ class AndroidLanTcpPlugin extends LanTcpPlugin implements EventListener {
 		return SocketFactory.getDefault();
 	}
 
-	@Override
-	public void eventOccurred(Event e) {
-		if (e instanceof NetworkStatusEvent) updateConnectionStatus();
-	}
+	private class NetworkStateReceiver extends BroadcastReceiver {
 
-	private void updateConnectionStatus() {
-		connectionStatusExecutor.execute(() -> {
+		@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() {
 			if (!running) return;
 			Collection<InetAddress> addrs = getLocalIpAddresses();
 			if (addrs.contains(WIFI_AP_ADDRESS)) {
@@ -161,6 +186,11 @@ class AndroidLanTcpPlugin extends LanTcpPlugin implements EventListener {
 				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

@@ -2,7 +2,6 @@ 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;
@@ -12,6 +11,7 @@ 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;
 
@@ -28,14 +28,15 @@ public class AndroidLanTcpPluginFactory implements DuplexPluginFactory {
 	private static final double BACKOFF_BASE = 1.2;
 
 	private final Executor ioExecutor;
-	private final EventBus eventBus;
+	private final ScheduledExecutorService scheduler;
 	private final BackoffFactory backoffFactory;
 	private final Context appContext;
 
-	public AndroidLanTcpPluginFactory(Executor ioExecutor, EventBus eventBus,
-			BackoffFactory backoffFactory, Context appContext) {
+	public AndroidLanTcpPluginFactory(Executor ioExecutor,
+			ScheduledExecutorService scheduler, BackoffFactory backoffFactory,
+			Context appContext) {
 		this.ioExecutor = ioExecutor;
-		this.eventBus = eventBus;
+		this.scheduler = scheduler;
 		this.backoffFactory = backoffFactory;
 		this.appContext = appContext;
 	}
@@ -54,9 +55,7 @@ public class AndroidLanTcpPluginFactory implements DuplexPluginFactory {
 	public DuplexPlugin createPlugin(DuplexPluginCallback callback) {
 		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
 				MAX_POLLING_INTERVAL, BACKOFF_BASE);
-		AndroidLanTcpPlugin plugin = new AndroidLanTcpPlugin(ioExecutor,
-				appContext, backoff, callback, MAX_LATENCY, MAX_IDLE_TIME);
-		eventBus.addListener(plugin);
-		return plugin;
+		return new AndroidLanTcpPlugin(ioExecutor, scheduler, backoff,
+				appContext, callback, MAX_LATENCY, MAX_IDLE_TIME);
 	}
 }

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

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

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

@@ -0,0 +1,18 @@
+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

@@ -1,5 +1,18 @@
 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.FileObserver;
+import android.os.PowerManager;
+
 import net.freehaven.tor.control.EventHandler;
 import net.freehaven.tor.control.TorControlConnection;
 
@@ -9,9 +22,6 @@ 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;
@@ -24,10 +34,9 @@ import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
 import org.briarproject.bramble.api.properties.TransportProperties;
 import org.briarproject.bramble.api.settings.Settings;
 import org.briarproject.bramble.api.settings.event.SettingsUpdatedEvent;
-import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
-import org.briarproject.bramble.api.system.ResourceProvider;
 import org.briarproject.bramble.util.IoUtils;
+import org.briarproject.bramble.util.StringUtils;
 
 import java.io.Closeable;
 import java.io.EOFException;
@@ -40,16 +49,18 @@ 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.CountDownLatch;
 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;
@@ -57,80 +68,78 @@ 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.MILLISECONDS;
+import static java.util.concurrent.TimeUnit.MINUTES;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static net.freehaven.tor.control.TorControlCommands.HS_ADDRESS;
 import static net.freehaven.tor.control.TorControlCommands.HS_PRIVKEY;
 import static org.briarproject.bramble.api.plugin.TorConstants.CONTROL_PORT;
 import static org.briarproject.bramble.api.plugin.TorConstants.ID;
-import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_MOBILE;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK;
-import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_AUTOMATIC;
+import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_ALWAYS;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_NEVER;
-import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_WITH_BRIDGES;
+import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_WIFI;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_PORT;
-import static org.briarproject.bramble.api.plugin.TorConstants.PROP_ONION_V2;
-import static org.briarproject.bramble.api.plugin.TorConstants.PROP_ONION_V3;
-import static org.briarproject.bramble.util.LogUtils.logException;
+import static org.briarproject.bramble.api.plugin.TorConstants.PROP_ONION;
 import static org.briarproject.bramble.util.PrivacyUtils.scrubOnion;
-import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
-abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
-
-	private static final Logger LOG =
-			Logger.getLogger(TorPlugin.class.getName());
+class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 
 	private static final String[] EVENTS = {
 			"CIRC", "ORCONN", "HS_DESC", "NOTICE", "WARN", "ERR"
 	};
 	private static final String OWNER = "__OwningControllerProcess";
-	private static final int COOKIE_TIMEOUT_MS = 3000;
-	private static final int COOKIE_POLLING_INTERVAL_MS = 200;
-	private static final Pattern ONION_V2 = Pattern.compile("[a-z2-7]{16}");
-	private static final Pattern ONION_V3 = Pattern.compile("[a-z2-7]{56}");
+	private static final int COOKIE_TIMEOUT = 3000; // Milliseconds
+	private static final Pattern ONION = Pattern.compile("[a-z2-7]{16}");
+	private static final Logger LOG =
+			Logger.getLogger(TorPlugin.class.getName());
 
 	private final Executor ioExecutor, connectionStatusExecutor;
-	private final NetworkManager networkManager;
+	private final ScheduledExecutorService scheduler;
+	private final Context appContext;
 	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 ResourceProvider resourceProvider;
 	private final int maxLatency, maxIdleTime, socketTimeout;
+	private final ConnectionStatus connectionStatus;
 	private final File torDirectory, torFile, geoIpFile, configFile;
 	private final File doneFile, cookieFile;
-	private final ConnectionStatus connectionStatus;
+	private final PowerManager.WakeLock 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 Settings settings = null;
+	private volatile BroadcastReceiver networkStateReceiver = null;
 
-	protected volatile boolean running = false;
-
-	protected abstract int getProcessId();
-
-	protected abstract long getLastUpdateTime();
-
-	TorPlugin(Executor ioExecutor, NetworkManager networkManager,
-			LocationUtils locationUtils, SocketFactory torSocketFactory,
-			Clock clock, ResourceProvider resourceProvider,
-			CircumventionProvider circumventionProvider, Backoff backoff,
-			DuplexPluginCallback callback, String architecture, int maxLatency,
-			int maxIdleTime, File torDirectory) {
+	TorPlugin(Executor ioExecutor, ScheduledExecutorService scheduler,
+			Context appContext, LocationUtils locationUtils,
+			SocketFactory torSocketFactory, Backoff backoff,
+			DuplexPluginCallback callback, String architecture,
+			int maxLatency, int maxIdleTime) {
 		this.ioExecutor = ioExecutor;
-		this.networkManager = networkManager;
+		this.scheduler = scheduler;
+		this.appContext = appContext;
 		this.locationUtils = locationUtils;
 		this.torSocketFactory = torSocketFactory;
-		this.clock = clock;
-		this.resourceProvider = resourceProvider;
-		this.circumventionProvider = circumventionProvider;
 		this.backoff = backoff;
 		this.callback = callback;
 		this.architecture = architecture;
@@ -139,16 +148,21 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		if (maxIdleTime > Integer.MAX_VALUE / 2)
 			socketTimeout = Integer.MAX_VALUE;
 		else socketTimeout = maxIdleTime * 2;
-		this.torDirectory = torDirectory;
+		connectionStatus = new ConnectionStatus();
+		torDirectory = appContext.getDir("tor", MODE_PRIVATE);
 		torFile = new File(torDirectory, "tor");
 		geoIpFile = new File(torDirectory, "geoip");
 		configFile = new File(torDirectory, "torrc");
 		doneFile = new File(torDirectory, "done");
 		cookieFile = new File(torDirectory, ".tor/control_auth_cookie");
-		connectionStatus = new ConnectionStatus();
+		Object o = appContext.getSystemService(POWER_SERVICE);
+		PowerManager pm = (PowerManager) o;
+		// This tag will prevent Huawei's powermanager from killing us.
+		wakeLock = pm.newWakeLock(PARTIAL_WAKE_LOCK, "LocationManagerService");
+		wakeLock.setReferenceCounted(false);
 		// Don't execute more than one connection status check at a time
-		connectionStatusExecutor =
-				new PoliteExecutor("TorPlugin", ioExecutor, 1);
+		connectionStatusExecutor = new PoliteExecutor("TorPlugin",
+				ioExecutor, 1);
 	}
 
 	@Override
@@ -169,25 +183,23 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	@Override
 	public void start() throws PluginException {
 		if (used.getAndSet(true)) throw new IllegalStateException();
-		if (!torDirectory.exists()) {
-			if (!torDirectory.mkdirs()) {
-				LOG.warning("Could not create Tor directory.");
-				throw new PluginException();
-			}
-		}
-		// Load the settings
-		settings = callback.getSettings();
 		// Install or update the assets if necessary
 		if (!assetsAreUpToDate()) installAssets();
-		if (cookieFile.exists() && !cookieFile.delete())
-			LOG.warning("Old auth cookie not deleted");
-		// Migrate old settings before having a chance to stop
-		migrateSettings();
-		// Start a new Tor process
 		LOG.info("Starting Tor");
+		// Watch for the auth cookie file being updated
+		try {
+			cookieFile.getParentFile().mkdirs();
+			cookieFile.createNewFile();
+		} catch (IOException e) {
+			throw new PluginException(e);
+		}
+		CountDownLatch latch = new CountDownLatch(1);
+		FileObserver obs = new WriteObserver(cookieFile, latch);
+		obs.startWatching();
+		// Start a new Tor process
 		String torPath = torFile.getAbsolutePath();
 		String configPath = configFile.getAbsolutePath();
-		String pid = String.valueOf(getProcessId());
+		String pid = String.valueOf(android.os.Process.myPid());
 		Process torProcess;
 		ProcessBuilder pb =
 				new ProcessBuilder(torPath, "-f", configPath, OWNER, pid);
@@ -223,16 +235,11 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				throw new PluginException();
 			}
 			// Wait for the auth cookie file to be created/updated
-			long start = clock.currentTimeMillis();
-			while (cookieFile.length() < 32) {
-				if (clock.currentTimeMillis() - start > COOKIE_TIMEOUT_MS) {
-					LOG.warning("Auth cookie not created");
-					if (LOG.isLoggable(INFO)) listFiles(torDirectory);
-					throw new PluginException();
-				}
-				Thread.sleep(COOKIE_POLLING_INTERVAL_MS);
+			if (!latch.await(COOKIE_TIMEOUT, MILLISECONDS)) {
+				LOG.warning("Auth cookie not created");
+				if (LOG.isLoggable(INFO)) listFiles(torDirectory);
+				throw new PluginException();
 			}
-			LOG.info("Auth cookie created");
 		} catch (InterruptedException e) {
 			LOG.warning("Interrupted while starting Tor");
 			Thread.currentThread().interrupt();
@@ -259,14 +266,26 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		} catch (IOException e) {
 			throw new PluginException(e);
 		}
-		// Check whether we're online
-		updateConnectionStatus(networkManager.getNetworkStatus());
+		// 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);
 		// Bind a server socket to receive incoming hidden service connections
 		bind();
 	}
 
 	private boolean assetsAreUpToDate() {
-		return doneFile.lastModified() > getLastUpdateTime();
+		try {
+			PackageManager pm = appContext.getPackageManager();
+			PackageInfo pi = pm.getPackageInfo(appContext.getPackageName(), 0);
+			return doneFile.lastModified() > pi.lastUpdateTime;
+		} catch (NameNotFoundException e) {
+			throw new RuntimeException(e);
+		}
 	}
 
 	private void installAssets() throws PluginException {
@@ -299,30 +318,36 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private InputStream getTorInputStream() throws IOException {
 		if (LOG.isLoggable(INFO))
 			LOG.info("Installing Tor binary for " + architecture);
-		InputStream in = resourceProvider
-				.getResourceInputStream("tor_" + architecture, ".zip");
+		int resId = getResourceId("tor_" + architecture);
+		InputStream in = appContext.getResources().openRawResource(resId);
 		ZipInputStream zin = new ZipInputStream(in);
 		if (zin.getNextEntry() == null) throw new IOException();
 		return zin;
 	}
 
 	private InputStream getGeoIpInputStream() throws IOException {
-		InputStream in = resourceProvider.getResourceInputStream("geoip",
-				".zip");
+		int resId = getResourceId("geoip");
+		InputStream in = appContext.getResources().openRawResource(resId);
 		ZipInputStream zin = new ZipInputStream(in);
 		if (zin.getNextEntry() == null) throw new IOException();
 		return zin;
 	}
 
 	private InputStream getConfigInputStream() {
-		return getClass().getClassLoader().getResourceAsStream("torrc");
+		int resId = getResourceId("torrc");
+		return appContext.getResources().openRawResource(resId);
+	}
+
+	private int getResourceId(String filename) {
+		Resources res = appContext.getResources();
+		return res.getIdentifier(filename, "raw", appContext.getPackageName());
 	}
 
 	private void tryToClose(@Nullable Closeable c) {
 		try {
 			if (c != null) c.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -330,7 +355,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		try {
 			if (s != null) s.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -339,7 +364,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			File[] children = f.listFiles();
 			if (children != null) for (File child : children) listFiles(child);
 		} else {
-			LOG.info(f.getAbsolutePath() + " " + f.length());
+			LOG.info(f.getAbsolutePath());
 		}
 	}
 
@@ -362,9 +387,9 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private void bind() {
 		ioExecutor.execute(() -> {
 			// If there's already a port number stored in config, reuse it
-			String portString = settings.get(PREF_TOR_PORT);
+			String portString = callback.getSettings().get(PREF_TOR_PORT);
 			int port;
-			if (isNullOrEmpty(portString)) port = 0;
+			if (StringUtils.isNullOrEmpty(portString)) port = 0;
 			else port = Integer.parseInt(portString);
 			// Bind a server socket to receive connections from Tor
 			ServerSocket ss = null;
@@ -372,7 +397,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				ss = new ServerSocket();
 				ss.bind(new InetSocketAddress("127.0.0.1", port));
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				tryToClose(ss);
 				return;
 			}
@@ -398,7 +423,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		try {
 			if (ss != null) ss.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		} finally {
 			callback.transportDisabled();
 		}
@@ -407,7 +432,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private void publishHiddenService(String port) {
 		if (!running) return;
 		LOG.info("Creating hidden service");
-		String privKey = settings.get(HS_PRIVKEY);
+		String privKey = callback.getSettings().get(HS_PRIVKEY);
 		Map<Integer, String> portLines =
 				Collections.singletonMap(80, "127.0.0.1:" + port);
 		Map<String, String> response;
@@ -417,7 +442,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				response = controlConnection.addOnion(portLines);
 			else response = controlConnection.addOnion(privKey, portLines);
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return;
 		}
 		if (!response.containsKey(HS_ADDRESS)) {
@@ -429,11 +454,11 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			return;
 		}
 		// Publish the hidden service's onion hostname in transport properties
-		String onion2 = response.get(HS_ADDRESS);
+		String hostname = response.get(HS_ADDRESS);
 		if (LOG.isLoggable(INFO))
-			LOG.info("Hidden service " + scrubOnion(onion2));
+			LOG.info("Hidden service " + scrubOnion(hostname));
 		TransportProperties p = new TransportProperties();
-		p.put(PROP_ONION_V2, onion2);
+		p.put(PROP_ONION, hostname);
 		callback.mergeLocalProperties(p);
 		if (privKey == null) {
 			// Save the hidden service's private key for next time
@@ -461,21 +486,14 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		}
 	}
 
-	protected void enableNetwork(boolean enable) throws IOException {
+	private void enableNetwork(boolean enable) throws IOException {
 		if (!running) return;
+		if (enable) wakeLock.acquire();
 		connectionStatus.enableNetwork(enable);
 		controlConnection.setConf("DisableNetwork", enable ? "0" : "1");
-		if (!enable) callback.transportDisabled();
-	}
-
-	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");
+		if (!enable) {
+			callback.transportDisabled();
+			wakeLock.release();
 		}
 	}
 
@@ -483,6 +501,8 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	public void stop() {
 		running = false;
 		tryToClose(socket);
+		if (networkStateReceiver != null)
+			appContext.unregisterReceiver(networkStateReceiver);
 		if (controlSocket != null && controlConnection != null) {
 			try {
 				LOG.info("Stopping Tor");
@@ -490,9 +510,10 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				controlConnection.shutdownTor("TERM");
 				controlSocket.close();
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
+		wakeLock.release();
 	}
 
 	@Override
@@ -532,41 +553,27 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	@Override
 	public DuplexTransportConnection createConnection(TransportProperties p) {
 		if (!isRunning()) return null;
-		String bestOnion = null;
-		String onion2 = p.get(PROP_ONION_V2);
-		String onion3 = p.get(PROP_ONION_V3);
-		if (!isNullOrEmpty(onion2)) {
-			if (ONION_V2.matcher(onion2).matches()) {
-				bestOnion = onion2;
-			} else {
-				// Don't scrub the address so we can find the problem
-				if (LOG.isLoggable(INFO))
-					LOG.info("Invalid v2 hostname: " + onion2);
-			}
+		String onion = p.get(PROP_ONION);
+		if (StringUtils.isNullOrEmpty(onion)) return null;
+		if (!ONION.matcher(onion).matches()) {
+			// not scrubbing this address, so we are able to find the problem
+			if (LOG.isLoggable(INFO)) LOG.info("Invalid hostname: " + onion);
+			return null;
 		}
-		if (!isNullOrEmpty(onion3)) {
-			if (ONION_V3.matcher(onion3).matches()) {
-				bestOnion = onion3;
-			} else {
-				// Don't scrub the address so we can find the problem
-				if (LOG.isLoggable(INFO))
-					LOG.info("Invalid v3 hostname: " + onion3);
-			}
-		}
-		if (bestOnion == null) return null;
 		Socket s = null;
 		try {
 			if (LOG.isLoggable(INFO))
-				LOG.info("Connecting to " + scrubOnion(bestOnion));
-			s = torSocketFactory.createSocket(bestOnion + ".onion", 80);
+				LOG.info("Connecting to " + scrubOnion(onion));
+			controlConnection.forgetHiddenService(onion);
+			s = torSocketFactory.createSocket(onion + ".onion", 80);
 			s.setSoTimeout(socketTimeout);
 			if (LOG.isLoggable(INFO))
-				LOG.info("Connected to " + scrubOnion(bestOnion));
+				LOG.info("Connected to " + scrubOnion(onion));
 			return new TorTransportConnection(this, s);
 		} catch (IOException e) {
 			if (LOG.isLoggable(INFO)) {
-				LOG.info("Could not connect to " + scrubOnion(bestOnion)
-						+ ": " + e.toString());
+				LOG.info("Could not connect to " + scrubOnion(onion) + ": " +
+						e.toString());
 			}
 			tryToClose(s);
 			return null;
@@ -605,12 +612,9 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 
 	@Override
 	public void orConnStatus(String status, String orName) {
-		if (LOG.isLoggable(INFO))
-			LOG.info("OR connection " + status + " " + orName);
-		if (status.equals("CLOSED") || status.equals("FAILED")) {
-			// Check whether we've lost connectivity
-			updateConnectionStatus(networkManager.getNetworkStatus());
-		}
+		if (LOG.isLoggable(INFO)) LOG.info("OR connection " + status);
+		if (status.equals("CLOSED") || status.equals("FAILED"))
+			updateConnectionStatus(); // Check whether we've lost connectivity
 	}
 
 	@Override
@@ -637,46 +641,46 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			LOG.info("Descriptor uploaded");
 	}
 
+	private static class WriteObserver extends FileObserver {
+
+		private final CountDownLatch latch;
+
+		private WriteObserver(File file, CountDownLatch latch) {
+			super(file.getAbsolutePath(), CLOSE_WRITE);
+			this.latch = latch;
+		}
+
+		@Override
+		public void onEvent(int event, @Nullable String path) {
+			stopWatching();
+			latch.countDown();
+		}
+	}
+
 	@Override
 	public void eventOccurred(Event e) {
 		if (e instanceof SettingsUpdatedEvent) {
 			SettingsUpdatedEvent s = (SettingsUpdatedEvent) e;
 			if (s.getNamespace().equals(ID.getString())) {
 				LOG.info("Tor settings updated");
-				settings = s.getSettings();
-				// Works around a bug introduced in Tor 0.3.4.8. Could be
-				// replaced with callback.transportDisabled() when fixed.
-				disableNetwork();
-				updateConnectionStatus(networkManager.getNetworkStatus());
+				updateConnectionStatus();
 			}
-		} else if (e instanceof NetworkStatusEvent) {
-			updateConnectionStatus(((NetworkStatusEvent) e).getStatus());
 		}
 	}
 
-	private void disableNetwork() {
-		connectionStatusExecutor.execute(() -> {
-			try {
-				enableNetwork(false);
-			} catch (IOException ex) {
-				logException(LOG, WARNING, ex);
-			}
-		});
-	}
-
-	private void updateConnectionStatus(NetworkStatus status) {
+	private void updateConnectionStatus() {
 		connectionStatusExecutor.execute(() -> {
 			if (!running) return;
-			boolean online = status.isConnected();
-			boolean wifi = status.isWifi();
+			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;
 			String country = locationUtils.getCurrentCountry();
-			boolean blocked =
-					circumventionProvider.isTorProbablyBlocked(country);
-			int network = settings.getInt(PREF_TOR_NETWORK,
-					PREF_TOR_NETWORK_AUTOMATIC);
-			boolean useMobile = settings.getBoolean(PREF_TOR_MOBILE, true);
-			boolean bridgesWork = circumventionProvider.doBridgesWork(country);
-			boolean automatic = network == PREF_TOR_NETWORK_AUTOMATIC;
+			boolean blocked = TorNetworkMetadata.isTorProbablyBlocked(
+					country);
+			Settings s = callback.getSettings();
+			int network = s.getInt(PREF_TOR_NETWORK, PREF_TOR_NETWORK_ALWAYS);
 
 			if (LOG.isLoggable(INFO)) {
 				LOG.info("Online: " + online + ", wifi: " + wifi);
@@ -688,42 +692,44 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				if (!online) {
 					LOG.info("Disabling network, device is offline");
 					enableNetwork(false);
-				} else if (network == PREF_TOR_NETWORK_NEVER ||
-						(!useMobile && !wifi)) {
-					LOG.info("Disabling network due to setting");
-					enableNetwork(false);
-				} else if (automatic && blocked && !bridgesWork) {
+				} else if (blocked) {
 					LOG.info("Disabling network, country is blocked");
 					enableNetwork(false);
-				} else if (network == PREF_TOR_NETWORK_WITH_BRIDGES ||
-						(automatic && bridgesWork)) {
-					LOG.info("Enabling network, using bridges");
-					enableBridges(true);
-					enableNetwork(true);
+				} else if (network == PREF_TOR_NETWORK_NEVER
+						|| (network == PREF_TOR_NETWORK_WIFI && !wifi)) {
+					LOG.info("Disabling network due to data setting");
+					enableNetwork(false);
 				} else {
-					LOG.info("Enabling network, not using bridges");
-					enableBridges(false);
+					LOG.info("Enabling network");
 					enableNetwork(true);
 				}
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
 
-	// TODO remove when sufficient time has passed. Added 2018-08-15
-	private void migrateSettings() {
-		Settings sOld = callback.getSettings();
-		int oldNetwork = sOld.getInt("network", -1);
-		if (oldNetwork == -1) return;
-		Settings s = new Settings();
-		if (oldNetwork == 0) {
-			s.putInt(PREF_TOR_NETWORK, PREF_TOR_NETWORK_NEVER);
-		} else if (oldNetwork == 1) {
-			s.putBoolean(PREF_TOR_MOBILE, false);
+	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();
+			}
 		}
-		s.putInt("network", -1);
-		callback.mergeSettings(s);
 	}
 
 	private static class ConnectionStatus {

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

@@ -4,7 +4,6 @@ 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;
@@ -13,9 +12,7 @@ import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginCallback;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
-import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
-import org.briarproject.bramble.api.system.ResourceProvider;
 import org.briarproject.bramble.util.AndroidUtils;
 
 import java.util.concurrent.Executor;
@@ -27,10 +24,10 @@ import javax.net.SocketFactory;
 
 @Immutable
 @NotNullByDefault
-public class AndroidTorPluginFactory implements DuplexPluginFactory {
+public class TorPluginFactory implements DuplexPluginFactory {
 
 	private static final Logger LOG =
-			Logger.getLogger(AndroidTorPluginFactory.class.getName());
+			Logger.getLogger(TorPluginFactory.class.getName());
 
 	private static final int MAX_LATENCY = 30 * 1000; // 30 seconds
 	private static final int MAX_IDLE_TIME = 30 * 1000; // 30 seconds
@@ -41,32 +38,22 @@ public class AndroidTorPluginFactory 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 ResourceProvider resourceProvider;
-	private final CircumventionProvider circumventionProvider;
-	private final Clock clock;
 
-	public AndroidTorPluginFactory(Executor ioExecutor,
+	public TorPluginFactory(Executor ioExecutor,
 			ScheduledExecutorService scheduler, Context appContext,
-			NetworkManager networkManager, LocationUtils locationUtils,
-			EventBus eventBus, SocketFactory torSocketFactory,
-			BackoffFactory backoffFactory, ResourceProvider resourceProvider,
-			CircumventionProvider circumventionProvider, Clock clock) {
+			LocationUtils locationUtils, EventBus eventBus,
+			SocketFactory torSocketFactory, BackoffFactory backoffFactory) {
 		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.resourceProvider = resourceProvider;
-		this.circumventionProvider = circumventionProvider;
-		this.clock = clock;
 	}
 
 	@Override
@@ -102,10 +89,9 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 
 		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
 				MAX_POLLING_INTERVAL, BACKOFF_BASE);
-		AndroidTorPlugin plugin = new AndroidTorPlugin(ioExecutor, scheduler,
-				appContext, networkManager, locationUtils, torSocketFactory,
-				clock, resourceProvider, circumventionProvider, backoff,
-				callback, architecture, MAX_LATENCY, MAX_IDLE_TIME);
+		TorPlugin plugin = new TorPlugin(ioExecutor, scheduler, appContext,
+				locationUtils, torSocketFactory, backoff, callback,
+				architecture, MAX_LATENCY, MAX_IDLE_TIME);
 		eventBus.addListener(plugin);
 		return plugin;
 	}

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

@@ -1,32 +0,0 @@
-package org.briarproject.bramble.system;
-
-import android.app.Application;
-import android.content.Context;
-import android.content.res.Resources;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.system.ResourceProvider;
-
-import java.io.InputStream;
-
-import javax.inject.Inject;
-
-@NotNullByDefault
-class AndroidResourceProvider implements ResourceProvider {
-
-	private final Context appContext;
-
-	@Inject
-	AndroidResourceProvider(Application app) {
-		this.appContext = app.getApplicationContext();
-	}
-
-	@Override
-	public InputStream getResourceInputStream(String name, String extension) {
-		Resources res = appContext.getResources();
-		// extension is ignored on Android, resources are retrieved without it
-		int resId =
-				res.getIdentifier(name, "raw", appContext.getPackageName());
-		return res.openRawResource(resId);
-	}
-}

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

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

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

@@ -3,6 +3,7 @@ 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;
 
@@ -57,6 +58,30 @@ 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/java/org/briarproject/bramble/util/RenewableWakeLock.java

@@ -1,100 +0,0 @@
-package org.briarproject.bramble.util;
-
-import android.os.PowerManager;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.ScheduledFuture;
-import java.util.concurrent.TimeUnit;
-import java.util.logging.Logger;
-
-import javax.annotation.Nullable;
-import javax.annotation.concurrent.ThreadSafe;
-
-import static java.util.concurrent.TimeUnit.MILLISECONDS;
-import static java.util.logging.Level.INFO;
-
-@ThreadSafe
-@NotNullByDefault
-public class RenewableWakeLock {
-
-	private static final Logger LOG =
-			Logger.getLogger(RenewableWakeLock.class.getName());
-
-	/**
-	 * Automatically release the lock this many milliseconds after it's due
-	 * to have been replaced and released.
-	 */
-	private static final int SAFETY_MARGIN_MS = 10_000;
-
-	private final PowerManager powerManager;
-	private final ScheduledExecutorService scheduler;
-	private final int levelAndFlags;
-	private final String tag;
-	private final long durationMs;
-	private final Runnable renewTask;
-
-	private final Object lock = new Object();
-	@Nullable
-	private PowerManager.WakeLock wakeLock; // Locking: lock
-	@Nullable
-	private ScheduledFuture future; // Locking: lock
-
-	public RenewableWakeLock(PowerManager powerManager,
-			ScheduledExecutorService scheduler, int levelAndFlags, String tag,
-			long duration, TimeUnit timeUnit) {
-		this.powerManager = powerManager;
-		this.scheduler = scheduler;
-		this.levelAndFlags = levelAndFlags;
-		this.tag = tag;
-		durationMs = MILLISECONDS.convert(duration, timeUnit);
-		renewTask = this::renew;
-	}
-
-	public void acquire() {
-		if (LOG.isLoggable(INFO)) LOG.info("Acquiring wake lock " + tag);
-		synchronized (lock) {
-			if (wakeLock != null) {
-				LOG.info("Already acquired");
-				return;
-			}
-			wakeLock = powerManager.newWakeLock(levelAndFlags, tag);
-			wakeLock.setReferenceCounted(false);
-			wakeLock.acquire(durationMs + SAFETY_MARGIN_MS);
-			future = scheduler.schedule(renewTask, durationMs, MILLISECONDS);
-		}
-	}
-
-	private void renew() {
-		if (LOG.isLoggable(INFO)) LOG.info("Renewing wake lock " + tag);
-		synchronized (lock) {
-			if (wakeLock == null) {
-				LOG.info("Already released");
-				return;
-			}
-			PowerManager.WakeLock oldWakeLock = wakeLock;
-			wakeLock = powerManager.newWakeLock(levelAndFlags, tag);
-			wakeLock.setReferenceCounted(false);
-			wakeLock.acquire(durationMs + SAFETY_MARGIN_MS);
-			oldWakeLock.release();
-			future = scheduler.schedule(renewTask, durationMs, MILLISECONDS);
-		}
-	}
-
-	public void release() {
-		if (LOG.isLoggable(INFO)) LOG.info("Releasing wake lock " + tag);
-		synchronized (lock) {
-			if (wakeLock == null) {
-				LOG.info("Already released");
-				return;
-			}
-			if (future == null) throw new AssertionError();
-			future.cancel(false);
-			future = null;
-			wakeLock.release();
-			wakeLock = null;
-		}
-	}
-}
-

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

@@ -1,162 +0,0 @@
-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-android/witness.gradle

@@ -1,94 +0,0 @@
-dependencyVerification {
-    verify = [
-        'cglib:cglib:3.2.0:cglib-3.2.0.jar:adb13bab79712ad6bdf1bd59f2a3918018a8016e722e8a357065afb9e6690861',
-        'com.android.tools.analytics-library:protos:26.2.1:protos-26.2.1.jar:2f371f5b1f551e85ab08be4d6a2873471b3d44afd1ebf6aa3298f3b796bf691f',
-        'com.android.tools.analytics-library:shared:26.2.1:shared-26.2.1.jar:4c1e4e705fa4d45f23aaea230557f6508155012d9c296337787c1d7b26a97f5a',
-        'com.android.tools.analytics-library:tracker:26.2.1:tracker-26.2.1.jar:4a624ecc976539f755ddb0bb8dfc2dd3d08326cfec59a098dbd70f701ca7fb75',
-        'com.android.tools.build:aapt2:3.2.1-4818971:aapt2-3.2.1-4818971-linux.jar:f431b6f96c91a2c155144b091a9c97d9805c589fe8efc9c930b6cd346cb60a1e',
-        'com.android.tools.build:apksig:3.2.1:apksig-3.2.1.jar:2b46f2feffea66037aab29e4261b2433c190194a6ef97b958511eb157f2ccba5',
-        'com.android.tools.build:apkzlib:3.2.1:apkzlib-3.2.1.jar:c39ad0313905932431fe81c8899c2cf39a4d92ad6c4edcaa4b25432f461452aa',
-        'com.android.tools.build:builder-model:3.2.1:builder-model-3.2.1.jar:a9f68e6abcec122f9cb5ad352d3f05a3eb03acbcdca95e4d25c16310c2c965ff',
-        'com.android.tools.build:builder-test-api:3.2.1:builder-test-api-3.2.1.jar:533ac6c2b5884bb54967a33791f2628dfdfac7981af39417a333b43d4379b6be',
-        'com.android.tools.build:builder:3.2.1:builder-3.2.1.jar:aedcbfd115dbe91d09b4113e66ef50589b558d0aa3b2f133b1d867c9b87fae83',
-        'com.android.tools.build:gradle-api:3.2.1:gradle-api-3.2.1.jar:57cf0ac5ac1dca8afdb3f62b94265e776e7dcfa641cc3844fb53a05193de208d',
-        'com.android.tools.build:manifest-merger:26.2.1:manifest-merger-26.2.1.jar:8830573263361035d38cfdcb51e2db94029c93865b21334f5fbf8a27984281a6',
-        'com.android.tools.ddms:ddmlib:26.2.1:ddmlib-26.2.1.jar:a4bf0a29a19980bf27269465cc782064656750b77c26728f82f9e148b705218b',
-        'com.android.tools.external.com-intellij:intellij-core:26.2.1:intellij-core-26.2.1.jar:4925ad1892c2687cb1a63427d440ef519c8c59215fefe0dc5d541d5d411fcafe',
-        'com.android.tools.external.com-intellij:kotlin-compiler:26.2.1:kotlin-compiler-26.2.1.jar:daa064fd708f340ee25fb9823c4c74104ac77f1370b76d907eb9ae6daec0a2ae',
-        'com.android.tools.external.org-jetbrains:uast:26.2.1:uast-26.2.1.jar:f10f7258d2ab9189562cc0f9ad838c0378fdba439229173390a99de02ebac75b',
-        'com.android.tools.layoutlib:layoutlib-api:26.2.1:layoutlib-api-26.2.1.jar:ddbf4fca123733fa011595b1cc1f4ac2937ed327b60990711fafc33c775c2ade',
-        'com.android.tools.lint:lint-api:26.2.1:lint-api-26.2.1.jar:3b57e739de567b98bc9ab56c2c0ee66fc026b4adf5843e8f9804ca0666a6f66e',
-        'com.android.tools.lint:lint-checks:26.2.1:lint-checks-26.2.1.jar:c86f4cc9aaee722ee4ad70062f7b5af91e9b041914af27adc09f545ab0fb3bc6',
-        'com.android.tools.lint:lint-gradle-api:26.2.1:lint-gradle-api-26.2.1.jar:2283e7af32e301565f2a797e531f0fc8c648077d457afb3ffdddbee638976c2f',
-        'com.android.tools.lint:lint-gradle:26.2.1:lint-gradle-26.2.1.jar:8fd90b2f3ec788cbb9801c07ab3e1ea2255aa31a6093157d7ea0ff13d0315ecb',
-        'com.android.tools.lint:lint-kotlin:26.2.1:lint-kotlin-26.2.1.jar:7a6a5d2b18f69cf1b900d857c2632b4c683713c533295933b8b759f8cab4a877',
-        'com.android.tools.lint:lint:26.2.1:lint-26.2.1.jar:7848b82ae988b90dee259ae7c7e86e05cbf52db6cd21c8bbd38ce7df08f3f8c5',
-        'com.android.tools:annotations:26.2.1:annotations-26.2.1.jar:7391c6a1e080174b96e64ceb078dadd31ce4d8a2d2fee0ec65be202126f90f24',
-        'com.android.tools:common:26.2.1:common-26.2.1.jar:a50aab2d6411ff68f4004a87c7e93d87d8e980a0ec3b352246549897ea2d78e5',
-        'com.android.tools:dvlib:26.2.1:dvlib-26.2.1.jar:72a83bf2839b1df9b1fbf67ba45d1bfb9f966cd774da4320c762b2be8f1688aa',
-        'com.android.tools:repository:26.2.1:repository-26.2.1.jar:fa74dae09103faef703df38550ad8fa244c5b6d1bf90d6198be932292b3d9cc1',
-        'com.android.tools:sdk-common:26.2.1:sdk-common-26.2.1.jar:759d4b292ca69a35cf961fca377b54158fc6c88108978006999442e80a011cf4',
-        'com.android.tools:sdklib:26.2.1:sdklib-26.2.1.jar:248df7ad5eac4aeb6f96c394c76760de4b7b89ac056e54d0c21a739368b91b45',
-        'com.google.code.findbugs:jsr305:1.3.9:jsr305-1.3.9.jar:905721a0eea90a81534abb7ee6ef4ea2e5e645fa1def0a5cd88402df1b46c9ed',
-        'com.google.code.gson:gson:2.8.0:gson-2.8.0.jar:c6221763bd79c4f1c3dc7f750b5f29a0bb38b367b81314c4f71896e340c40825',
-        'com.google.dagger:dagger-compiler:2.0.2:dagger-compiler-2.0.2.jar:b74bc9de063dd4c6400b232231f2ef5056145b8fbecbf5382012007dd1c071b3',
-        'com.google.dagger:dagger-producers:2.0-beta:dagger-producers-2.0-beta.jar:99ec15e8a0507ba569e7655bc1165ee5e5ca5aa914b3c8f7e2c2458f724edd6b',
-        'com.google.dagger:dagger:2.0.2:dagger-2.0.2.jar:84c0282ed8be73a29e0475d639da030b55dee72369e58dd35ae7d4fe6243dcf9',
-        'com.google.errorprone:error_prone_annotations:2.0.18:error_prone_annotations-2.0.18.jar:cb4cfad870bf563a07199f3ebea5763f0dec440fcda0b318640b1feaa788656b',
-        'com.google.guava:guava:18.0:guava-18.0.jar:d664fbfc03d2e5ce9cab2a44fb01f1d0bf9dfebeccc1a473b1f9ea31f79f6f99',
-        'com.google.guava:guava:23.0:guava-23.0.jar:7baa80df284117e5b945b19b98d367a85ea7b7801bd358ff657946c3bd1b6596',
-        'com.google.j2objc:j2objc-annotations:1.1:j2objc-annotations-1.1.jar:40ceb7157feb263949e0f503fe5f71689333a621021aa20ce0d0acee3badaa0f',
-        'com.google.jimfs:jimfs:1.1:jimfs-1.1.jar:c4828e28d7c0a930af9387510b3bada7daa5c04d7c25a75c7b8b081f1c257ddd',
-        'com.google.protobuf:protobuf-java:3.4.0:protobuf-java-3.4.0.jar:dce7e66b32456a1b1198da0caff3a8acb71548658391e798c79369241e6490a4',
-        'com.googlecode.json-simple:json-simple:1.1:json-simple-1.1.jar:2d9484f4c649f708f47f9a479465fc729770ee65617dca3011836602264f6439',
-        'com.squareup:javawriter:2.5.0:javawriter-2.5.0.jar:fcfb09fb0ea0aa97d3cfe7ea792398081348e468f126b3603cb3803f240197f0',
-        'com.sun.activation:javax.activation:1.2.0:javax.activation-1.2.0.jar:993302b16cd7056f21e779cc577d175a810bb4900ef73cd8fbf2b50f928ba9ce',
-        'com.sun.istack:istack-commons-runtime:2.21:istack-commons-runtime-2.21.jar:c33e67a0807095f02a0e2da139412dd7c4f9cc1a4c054b3e434f96831ba950f4',
-        'com.sun.xml.fastinfoset:FastInfoset:1.2.13:FastInfoset-1.2.13.jar:27a77db909f3c2833c0b1a37c55af1db06045118ad2eed96ce567b6632bce038',
-        'commons-codec:commons-codec:1.9:commons-codec-1.9.jar:ad19d2601c3abf0b946b5c3a4113e226a8c1e3305e395b90013b78dd94a723ce',
-        'commons-logging:commons-logging:1.2:commons-logging-1.2.jar:daddea1ea0be0f56978ab3006b8ac92834afeefbd9b7e4e6316fca57df0fa636',
-        'it.unimi.dsi:fastutil:7.2.0:fastutil-7.2.0.jar:74fa208043740642f7e6eb09faba15965218ad2f50ce3020efb100136e4b591c',
-        'javax.annotation:jsr250-api:1.0:jsr250-api-1.0.jar:a1a922d0d9b6d183ed3800dfac01d1e1eb159f0e8c6f94736931c1def54a941f',
-        'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
-        'javax.xml.bind:jaxb-api:2.2.12-b140109.1041:jaxb-api-2.2.12-b140109.1041.jar:b5e60cd8b7b5ff01ce4a74c5dd008f4fbd14ced3495d0b47b85cfedc182211f2',
-        'junit:junit:4.12:junit-4.12.jar:59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a',
-        'net.sf.jopt-simple:jopt-simple:4.9:jopt-simple-4.9.jar:26c5856e954b5f864db76f13b86919b59c6eecf9fd930b96baa8884626baf2f5',
-        'net.sf.kxml:kxml2:2.3.0:kxml2-2.3.0.jar:f264dd9f79a1fde10ce5ecc53221eff24be4c9331c830b7d52f2f08a7b633de2',
-        'org.apache.ant:ant-launcher:1.9.4:ant-launcher-1.9.4.jar:7bccea20b41801ca17bcbc909a78c835d0f443f12d639c77bd6ae3d05861608d',
-        'org.apache.ant:ant:1.9.4:ant-1.9.4.jar:649ae0730251de07b8913f49286d46bba7b92d47c5f332610aa426c4f02161d8',
-        'org.apache.commons:commons-compress:1.12:commons-compress-1.12.jar:2c1542faf343185b7cab9c3d55c8ae5471d6d095d3887a4adefdbdf2984dc0b6',
-        'org.apache.httpcomponents:httpclient:4.5.2:httpclient-4.5.2.jar:0dffc621400d6c632f55787d996b8aeca36b30746a716e079a985f24d8074057',
-        'org.apache.httpcomponents:httpcore:4.4.5:httpcore-4.4.5.jar:64d5453874cab7e40a7065cb01a9a9ca1053845a9786b478878b679e0580cec3',
-        'org.apache.httpcomponents:httpmime:4.5.2:httpmime-4.5.2.jar:231a3f7e4962053db2be8461d5422e68fc458a3a7dd7d8ada803a348e21f8f07',
-        'org.beanshell:bsh:1.3.0:bsh-1.3.0.jar:9b04edc75d19db54f1b4e8b5355e9364384c6cf71eb0a1b9724c159d779879f8',
-        'org.bouncycastle:bcpkix-jdk15on:1.56:bcpkix-jdk15on-1.56.jar:7043dee4e9e7175e93e0b36f45b1ec1ecb893c5f755667e8b916eb8dd201c6ca',
-        'org.bouncycastle:bcprov-jdk15on:1.56:bcprov-jdk15on-1.56.jar:963e1ee14f808ffb99897d848ddcdb28fa91ddda867eb18d303e82728f878349',
-        'org.briarproject:tor-android:0.3.4.8:tor-android-0.3.4.8.zip:989a0352d9d8d8172cd6c2137654e165e5d2beb10ed1211bab3814e224ad1926',
-        '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-common:1.2.71:kotlin-stdlib-common-1.2.71.jar:63999687ff2fce8a592dd180ffbbf8f1d21c26b4044c55cdc74ff3cf3b3cf328',
-        'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.2.71:kotlin-stdlib-jdk7-1.2.71.jar:b136bd61b240e07d4d92ce00d3bd1dbf584400a7bf5f220c2f3cd22446858082',
-        'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.2.71:kotlin-stdlib-jdk8-1.2.71.jar:ac3c8abf47790b64b4f7e2509a53f0c145e061ac1612a597520535d199946ea9',
-        'org.jetbrains.kotlin:kotlin-stdlib:1.2.71:kotlin-stdlib-1.2.71.jar:4c895c270b87f5fec2a2796e1d89c15407ee821de961527c28588bb46afbc68b',
-        '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:6.0:asm-analysis-6.0.jar:2f1a6387219c3a6cc4856481f221b03bd9f2408a326d416af09af5d6f608c1f4',
-        'org.ow2.asm:asm-commons:6.0:asm-commons-6.0.jar:f1bce5c648a96a017bdcd01fe5d59af9845297fd7b79b81c015a6fbbd9719abf',
-        'org.ow2.asm:asm-tree:6.0:asm-tree-6.0.jar:887998fb69727c8759e4d253f856822801e33f9fd4caa566b3ac58ee92106215',
-        'org.ow2.asm:asm-util:6.0:asm-util-6.0.jar:356afebdb0f870175262e5188f8709a3b17aa2a5a6a4b0340b04d4b449bca5f6',
-        'org.ow2.asm:asm:5.0.4:asm-5.0.4.jar:896618ed8ae62702521a78bc7be42b7c491a08e6920a15f89a3ecdec31e9a220',
-        'org.ow2.asm:asm:6.0:asm-6.0.jar:dd8971c74a4e697899a8e95caae4ea8760ea6c486dc6b97b1795e75760420461',
-    ]
-}

bramble-api/build.gradle

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

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

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

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

@@ -38,18 +38,4 @@ public abstract class StringMap extends Hashtable<String, String> {
 	public void putInt(String key, int value) {
 		put(key, String.valueOf(value));
 	}
-
-	public long getLong(String key, long defaultValue) {
-		String s = get(key);
-		if (s == null) return defaultValue;
-		try {
-			return Long.valueOf(s);
-		} catch (NumberFormatException e) {
-			return defaultValue;
-		}
-	}
-
-	public void putLong(String key, long value) {
-		put(key, String.valueOf(value));
-	}
 }

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

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

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

@@ -1,70 +0,0 @@
-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/client/BdfMessageValidator.java

@@ -16,6 +16,7 @@ import java.util.logging.Logger;
 
 import javax.annotation.concurrent.Immutable;
 
+import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 import static org.briarproject.bramble.api.transport.TransportConstants.MAX_CLOCK_DIFFERENCE;
 
 @Immutable
@@ -48,9 +49,14 @@ public abstract class BdfMessageValidator implements MessageValidator {
 			throw new InvalidMessageException(
 					"Timestamp is too far in the future");
 		}
+		byte[] raw = m.getRaw();
+		if (raw.length <= MESSAGE_HEADER_LENGTH) {
+			throw new InvalidMessageException("Message is too short");
+		}
 		try {
-			BdfList bodyList = clientHelper.toList(m.getBody());
-			BdfMessageContext result = validateMessage(m, g, bodyList);
+			BdfList body = clientHelper.toList(raw, MESSAGE_HEADER_LENGTH,
+					raw.length - MESSAGE_HEADER_LENGTH);
+			BdfMessageContext result = validateMessage(m, g, body);
 			Metadata meta = metadataEncoder.encode(result.getDictionary());
 			return new MessageContext(meta, result.getDependencies());
 		} catch (FormatException e) {

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

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

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

@@ -4,12 +4,8 @@ import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
-import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;
 
-import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_AUTHOR_NAME_LENGTH;
-import static org.briarproject.bramble.util.StringUtils.toUtf8;
-
 @Immutable
 @NotNullByDefault
 public class Contact {
@@ -17,21 +13,13 @@ public class Contact {
 	private final ContactId id;
 	private final Author author;
 	private final AuthorId localAuthorId;
-	@Nullable
-	private final String alias;
 	private final boolean verified, active;
 
 	public Contact(ContactId id, Author author, AuthorId localAuthorId,
-			@Nullable String alias, boolean verified, boolean active) {
-		if (alias != null) {
-			int aliasLength = toUtf8(alias).length;
-			if (aliasLength == 0 || aliasLength > MAX_AUTHOR_NAME_LENGTH)
-				throw new IllegalArgumentException();
-		}
+			boolean verified, boolean active) {
 		this.id = id;
 		this.author = author;
 		this.localAuthorId = localAuthorId;
-		this.alias = alias;
 		this.verified = verified;
 		this.active = active;
 	}
@@ -48,11 +36,6 @@ public class Contact {
 		return localAuthorId;
 	}
 
-	@Nullable
-	public String getAlias() {
-		return alias;
-	}
-
 	public boolean isVerified() {
 		return verified;
 	}

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

@@ -5,21 +5,18 @@ 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.AuthorId;
-import org.briarproject.bramble.api.identity.AuthorInfo;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import java.util.Collection;
 
-import javax.annotation.Nullable;
-
 @NotNullByDefault
 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(SecretKey)}.
+	 * {@link LifecycleManager#startServices(String)}.
 	 */
 	void registerContactHook(ContactHook hook);
 
@@ -96,12 +93,6 @@ public interface ContactManager {
 	void setContactActive(Transaction txn, ContactId c, boolean active)
 			throws DbException;
 
-	/**
-	 * Sets an alias name for the contact or unsets it if alias is null.
-	 */
-	void setContactAlias(ContactId c, @Nullable String alias)
-			throws DbException;
-
 	/**
 	 * Return true if a contact with this name and public key already exists
 	 */
@@ -114,16 +105,6 @@ public interface ContactManager {
 	boolean contactExists(AuthorId remoteAuthorId, AuthorId localAuthorId)
 			throws DbException;
 
-	/**
-	 * Returns the {@link AuthorInfo} for the given author.
-	 */
-	AuthorInfo getAuthorInfo(AuthorId a) throws DbException;
-
-	/**
-	 * Returns the {@link AuthorInfo} for the given author.
-	 */
-	AuthorInfo getAuthorInfo(Transaction txn, AuthorId a) throws DbException;
-
 	interface ContactHook {
 
 		void addingContact(Transaction txn, Contact c) throws DbException;

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

@@ -2,7 +2,6 @@ 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;
@@ -45,8 +44,7 @@ public interface DatabaseComponent {
 	 * @throws DataTooOldException if the data uses an older schema than the
 	 * current code and cannot be migrated
 	 */
-	boolean open(SecretKey key, @Nullable MigrationListener listener)
-			throws DbException;
+	boolean open(@Nullable MigrationListener listener) throws DbException;
 
 	/**
 	 * Waits for any open transactions to finish and closes the database.
@@ -76,19 +74,6 @@ public interface DatabaseComponent {
 	 */
 	void endTransaction(Transaction txn);
 
-	/**
-	 * Runs the given task within a transaction.
-	 */
-	<E extends Exception> void transaction(boolean readOnly,
-			DbRunnable<E> task) throws DbException, E;
-
-	/**
-	 * Runs the given task within a transaction and returns the result of the
-	 * task.
-	 */
-	<R, E extends Exception> R transactionWithResult(boolean readOnly,
-			DbCallable<R, E> task) throws DbException, E;
-
 	/**
 	 * Stores a contact associated with the given local and remote pseudonyms,
 	 * and returns an ID for the contact.
@@ -164,13 +149,13 @@ public interface DatabaseComponent {
 			throws DbException;
 
 	/**
-	 * Returns a batch of messages for the given contact, with a total length
-	 * less than or equal to the given length, for transmission over a
+	 * Returns a batch of raw messages for the given contact, with a total
+	 * length less than or equal to the given length, for transmission over a
 	 * transport with the given maximum latency. Returns null if there are no
 	 * sendable messages that fit in the given length.
 	 */
 	@Nullable
-	Collection<Message> generateBatch(Transaction txn, ContactId c,
+	Collection<byte[]> generateBatch(Transaction txn, ContactId c,
 			int maxLength, int maxLatency) throws DbException;
 
 	/**
@@ -191,14 +176,14 @@ public interface DatabaseComponent {
 			throws DbException;
 
 	/**
-	 * Returns a batch of messages for the given contact, with a total length
-	 * less than or equal to the given length, for transmission over a
+	 * Returns a batch of raw messages for the given contact, with a total
+	 * length less than or equal to the given length, for transmission over a
 	 * transport with the given maximum latency. Only messages that have been
 	 * requested by the contact are returned. Returns null if there are no
 	 * sendable messages that fit in the given length.
 	 */
 	@Nullable
-	Collection<Message> generateRequestedBatch(Transaction txn, ContactId c,
+	Collection<byte[]> generateRequestedBatch(Transaction txn, ContactId c,
 			int maxLength, int maxLatency) throws DbException;
 
 	/**
@@ -276,22 +261,13 @@ public interface DatabaseComponent {
 	 */
 	Collection<LocalAuthor> getLocalAuthors(Transaction txn) throws DbException;
 
-	/**
-	 * Returns the message with the given ID.
-	 * <p/>
-	 * Read-only.
-	 *
-	 * @throws MessageDeletedException if the message has been deleted
-	 */
-	Message getMessage(Transaction txn, MessageId m) throws DbException;
-
 	/**
 	 * Returns the IDs of all delivered messages in the given group.
 	 * <p/>
 	 * Read-only.
 	 */
 	Collection<MessageId> getMessageIds(Transaction txn, GroupId g)
-			throws DbException;
+		throws DbException;
 
 	/**
 	 * Returns the IDs of any messages that need to be validated.
@@ -319,6 +295,15 @@ public interface DatabaseComponent {
 	Collection<MessageId> getMessagesToShare(Transaction txn)
 			throws DbException;
 
+	/**
+	 * Returns the message with the given ID, in serialised form, or null if
+	 * the message has been deleted.
+	 * <p/>
+	 * Read-only.
+	 */
+	@Nullable
+	byte[] getRawMessage(Transaction txn, MessageId m) throws DbException;
+
 	/**
 	 * Returns the metadata for all delivered messages in the given group.
 	 * <p/>
@@ -502,7 +487,7 @@ 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.
@@ -515,12 +500,6 @@ public interface DatabaseComponent {
 	void setContactActive(Transaction txn, ContactId c, boolean active)
 			throws DbException;
 
-	/**
-	 * Sets an alias name for the contact or unsets it if alias is null.
-	 */
-	void setContactAlias(Transaction txn, ContactId c, @Nullable String alias)
-			throws DbException;
-
 	/**
 	 * Sets the given group's visibility to the given contact.
 	 */
@@ -555,7 +534,7 @@ 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

@@ -1,15 +1,30 @@
 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/db/DbCallable.java

@@ -1,6 +0,0 @@
-package org.briarproject.bramble.api.db;
-
-public interface DbCallable<R, E extends Exception> {
-
-	R call(Transaction txn) throws DbException, E;
-}

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

@@ -1,6 +0,0 @@
-package org.briarproject.bramble.api.db;
-
-public interface DbRunnable<E extends Exception> {
-
-	void run(Transaction txn) throws DbException, E;
-}

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

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

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

@@ -6,10 +6,6 @@ public interface MigrationListener {
 	 * This is called when a migration is started while opening the database.
 	 * It will be called once for each migration being applied.
 	 */
-	void onDatabaseMigration();
+	void onMigrationRun();
 
-	/**
-	 * This is called when compaction is started while opening the database.
-	 */
-	void onDatabaseCompaction();
 }

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

@@ -1,6 +1,5 @@
 package org.briarproject.bramble.api.identity;
 
-import org.briarproject.bramble.api.Nameable;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.util.StringUtils;
 
@@ -14,7 +13,11 @@ import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_PUBLIC_K
  */
 @Immutable
 @NotNullByDefault
-public class Author implements Nameable {
+public class Author {
+
+	public enum Status {
+		NONE, ANONYMOUS, UNKNOWN, UNVERIFIED, VERIFIED, OURSELVES
+	}
 
 	/**
 	 * The current version of the author structure.

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

@@ -1,42 +0,0 @@
-package org.briarproject.bramble.api.identity;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import javax.annotation.Nullable;
-import javax.annotation.concurrent.Immutable;
-
-@Immutable
-@NotNullByDefault
-public class AuthorInfo {
-
-	public enum Status {
-		NONE, ANONYMOUS, UNKNOWN, UNVERIFIED, VERIFIED, OURSELVES;
-
-		public boolean isContact() {
-			return this == UNVERIFIED || this == VERIFIED;
-		}
-	}
-
-	private final Status status;
-	@Nullable
-	private final String alias;
-
-	public AuthorInfo(Status status, @Nullable String alias) {
-		this.status = status;
-		this.alias = alias;
-	}
-
-	public AuthorInfo(Status status) {
-		this(status, null);
-	}
-
-	public Status getStatus() {
-		return status;
-	}
-
-	@Nullable
-	public String getAlias() {
-		return alias;
-	}
-
-}

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

@@ -1,39 +1,38 @@
 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;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 @NotNullByDefault
 public interface IdentityManager {
 
 	/**
-	 * Creates a local identity with the given name.
+	 * Stores the local pseudonym.
 	 */
-	@CryptoExecutor
-	LocalAuthor createLocalAuthor(String name);
+	void registerLocalAuthor(LocalAuthor a) throws DbException;
 
 	/**
-	 * 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.
+	 * Returns the cached main local identity, non-blocking, or loads it from
+	 * the db, blocking
 	 */
 	LocalAuthor getLocalAuthor() throws DbException;
 
 	/**
-	 * Returns the cached local identity or loads it from the database.
+	 * Returns the cached main local identity, non-blocking, or loads it from
+	 * the db, blocking, within the given Transaction.
 	 */
 	LocalAuthor getLocalAuthor(Transaction txn) throws DbException;
 
+	/**
+	 * Returns the trust-level status of the author
+	 */
+	Status getAuthorStatus(AuthorId a) throws DbException;
+
+	/**
+	 * Returns the trust-level status of the author
+	 */
+	Status getAuthorStatus(Transaction txn, AuthorId a) throws DbException;
+
 }

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

@@ -3,16 +3,20 @@ package org.briarproject.bramble.api.keyagreement;
 public interface KeyAgreementConstants {
 
 	/**
-	 * The version of the BQP protocol used in beta releases. This version
-	 * number is reserved.
-	 */
-	byte BETA_PROTOCOL_VERSION = 89;
-
-	/**
-	 * The current version of the BQP protocol.
+	 * The current version of the BQP protocol. Version number 89 is reserved.
 	 */
 	byte PROTOCOL_VERSION = 4;
 
+	/**
+	 * The length of the record header in bytes.
+	 */
+	int RECORD_HEADER_LENGTH = 4;
+
+	/**
+	 * The offset of the payload length in the record header, in bytes.
+	 */
+	int RECORD_HEADER_PAYLOAD_LENGTH_OFFSET = 2;
+
 	/**
 	 * The length of the BQP key commitment in bytes.
 	 */
@@ -21,7 +25,7 @@ public interface KeyAgreementConstants {
 	/**
 	 * The connection timeout in milliseconds.
 	 */
-	long CONNECTION_TIMEOUT = 60_000;
+	long CONNECTION_TIMEOUT = 20 * 1000;
 
 	/**
 	 * The transport identifier for Bluetooth.

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

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

bramble-api/src/main/java/org/briarproject/bramble/api/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 IO executor.
+ * for annotating methods that should run on the UI 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

@@ -1,12 +1,13 @@
 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
@@ -17,7 +18,7 @@ import java.util.concurrent.ExecutorService;
 public interface LifecycleManager {
 
 	/**
-	 * The result of calling {@link #startServices(SecretKey)}.
+	 * The result of calling {@link #startServices(String)}.
 	 */
 	enum StartResult {
 		ALREADY_RUNNING,
@@ -34,8 +35,7 @@ public interface LifecycleManager {
 	 */
 	enum LifecycleState {
 
-		STARTING, MIGRATING_DATABASE, COMPACTING_DATABASE, STARTING_SERVICES,
-		RUNNING, STOPPING;
+		STARTING, MIGRATING_DATABASE, STARTING_SERVICES, RUNNING, STOPPING;
 
 		public boolean isAfter(LifecycleState state) {
 			return ordinal() > state.ordinal();
@@ -44,27 +44,28 @@ public interface LifecycleManager {
 
 	/**
 	 * Registers a {@link Service} to be started and stopped. This method
-	 * should be called before {@link #startServices(SecretKey)}.
+	 * should be called before {@link #startServices(String)}.
 	 */
 	void registerService(Service s);
 
 	/**
 	 * Registers a {@link Client} to be started. This method should be called
-	 * before {@link #startServices(SecretKey)}.
+	 * before {@link #startServices(String)}.
 	 */
 	void registerClient(Client c);
 
 	/**
 	 * Registers an {@link ExecutorService} to be shut down. This method
-	 * should be called before {@link #startServices(SecretKey)}.
+	 * should be called before {@link #startServices(String)}.
 	 */
 	void registerForShutdown(ExecutorService e);
 
 	/**
-	 * Opens the {@link DatabaseComponent} using the given key and starts any
-	 * registered {@link Client Clients} and {@link Service Services}.
+	 * Opens the {@link DatabaseComponent}, optionally creates a local author
+	 * with the provided nickname, and starts any registered
+	 * {@link Client Clients} and {@link Service Services}.
 	 */
-	StartResult startServices(SecretKey dbKey);
+	StartResult startServices(@Nullable String nickname);
 
 	/**
 	 * Stops any registered {@link Service Services}, shuts down any

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

@@ -1,9 +0,0 @@
-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

@@ -1,25 +0,0 @@
-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

@@ -1,22 +0,0 @@
-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

@@ -4,8 +4,7 @@ public interface TorConstants {
 
 	TransportId ID = new TransportId("org.briarproject.bramble.tor");
 
-	String PROP_ONION_V2 = "onion";
-	String PROP_ONION_V3 = "onion3";
+	String PROP_ONION = "onion";
 
 	int SOCKS_PORT = 59050;
 	int CONTROL_PORT = 59051;
@@ -13,13 +12,11 @@ public interface TorConstants {
 	int CONNECT_TO_PROXY_TIMEOUT = 5000; // Milliseconds
 	int EXTRA_SOCKET_TIMEOUT = 30000; // Milliseconds
 
-	String PREF_TOR_NETWORK = "network2";
+	String PREF_TOR_NETWORK = "network";
 	String PREF_TOR_PORT = "port";
-	String PREF_TOR_MOBILE = "useMobileData";
 
-	int PREF_TOR_NETWORK_AUTOMATIC = 0;
-	int PREF_TOR_NETWORK_WITHOUT_BRIDGES = 1;
-	int PREF_TOR_NETWORK_WITH_BRIDGES = 2;
-	int PREF_TOR_NETWORK_NEVER = 3;
+	int PREF_TOR_NETWORK_NEVER = 0;
+	int PREF_TOR_NETWORK_WIFI = 1;
+	int PREF_TOR_NETWORK_ALWAYS = 2;
 
 }

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

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

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

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

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

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.sync;
 
-import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_BODY_LENGTH;
+import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_LENGTH;
 import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 
 public class Message {
@@ -13,16 +13,17 @@ public class Message {
 	private final MessageId id;
 	private final GroupId groupId;
 	private final long timestamp;
-	private final byte[] body;
+	private final byte[] raw;
 
-	public Message(MessageId id, GroupId groupId, long timestamp, byte[] body) {
-		if (body.length == 0) throw new IllegalArgumentException();
-		if (body.length > MAX_MESSAGE_BODY_LENGTH)
+	public Message(MessageId id, GroupId groupId, long timestamp, byte[] raw) {
+		if (raw.length <= MESSAGE_HEADER_LENGTH)
+			throw new IllegalArgumentException();
+		if (raw.length > MAX_MESSAGE_LENGTH)
 			throw new IllegalArgumentException();
 		this.id = id;
 		this.groupId = groupId;
 		this.timestamp = timestamp;
-		this.body = body;
+		this.raw = raw;
 	}
 
 	/**
@@ -49,15 +50,15 @@ public class Message {
 	/**
 	 * Returns the length of the raw message in bytes.
 	 */
-	public int getRawLength() {
-		return MESSAGE_HEADER_LENGTH + body.length;
+	public int getLength() {
+		return raw.length;
 	}
 
 	/**
-	 * Returns the message body.
+	 * Returns the raw message.
 	 */
-	public byte[] getBody() {
-		return body;
+	public byte[] getRaw() {
+		return raw;
 	}
 
 	@Override

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

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

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

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

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

@@ -1,6 +1,5 @@
 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;
@@ -36,8 +35,7 @@ public interface ValidationManager {
 
 	/**
 	 * Registers the message validator for the given client. This method
-	 * should be called before
-	 * {@link LifecycleManager#startServices(SecretKey)}.
+	 * should be called before {@link LifecycleManager#startServices(String)}.
 	 */
 	void registerMessageValidator(ClientId c, int majorVersion,
 			MessageValidator v);
@@ -46,7 +44,7 @@ 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(SecretKey)}.
+	 * {@link LifecycleManager#startServices(String)}.
 	 */
 	void registerIncomingMessageHook(ClientId c, int majorVersion,
 			IncomingMessageHook hook);

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

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

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

@@ -2,7 +2,6 @@ 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;
@@ -26,7 +25,7 @@ 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(SecretKey)}.
+	 * be called before {@link LifecycleManager#startServices(String)}.
 	 */
 	void registerClient(ClientId clientId, int majorVersion, int minorVersion,
 			ClientVersioningHook hook);

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

@@ -1,36 +0,0 @@
-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-api/src/test/java/org/briarproject/bramble/test/ArrayClock.java

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

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

@@ -1,24 +0,0 @@
-package org.briarproject.bramble.test;
-
-import org.briarproject.bramble.api.system.Clock;
-
-import java.util.concurrent.atomic.AtomicLong;
-
-public class SettableClock implements Clock {
-
-	private final AtomicLong time;
-
-	public SettableClock(AtomicLong time) {
-		this.time = time;
-	}
-
-	@Override
-	public long currentTimeMillis() {
-		return time.get();
-	}
-
-	@Override
-	public void sleep(long milliseconds) throws InterruptedException {
-		Thread.sleep(milliseconds);
-	}
-}

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

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

bramble-api/witness.gradle

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

bramble-core/build.gradle

@@ -6,7 +6,6 @@ apply plugin: 'ru.vyarus.animalsniffer'
 apply plugin: 'net.ltgt.apt'
 apply plugin: 'idea'
 apply plugin: 'witness'
-apply from: 'witness.gradle'
 
 dependencies {
 	implementation project(path: ':bramble-api', configuration: 'default')
@@ -14,8 +13,7 @@ dependencies {
 	implementation 'com.h2database:h2:1.4.192' // The last version that supports Java 1.6
 	implementation 'org.bitlet:weupnp:0.1.4'
 	implementation 'net.i2p.crypto:eddsa:0.2.0'
-	implementation 'org.whispersystems:curve25519-java:0.5.0'
-	implementation 'org.briarproject:jtorctl:0.3'
+	implementation 'org.whispersystems:curve25519-java:0.4.1'
 
 	apt 'com.google.dagger:dagger-compiler:2.0.2'
 
@@ -33,7 +31,40 @@ dependencies {
 	signature 'org.codehaus.mojo.signature:java16:1.1@signature'
 }
 
-// needed to make test output available to bramble-java
+dependencyVerification {
+	verify = [
+			'cglib:cglib:3.2.0:cglib-3.2.0.jar:adb13bab79712ad6bdf1bd59f2a3918018a8016e722e8a357065afb9e6690861',
+			'com.google.dagger:dagger-compiler:2.0.2:dagger-compiler-2.0.2.jar:b74bc9de063dd4c6400b232231f2ef5056145b8fbecbf5382012007dd1c071b3',
+			'com.google.dagger:dagger-producers:2.0-beta:dagger-producers-2.0-beta.jar:99ec15e8a0507ba569e7655bc1165ee5e5ca5aa914b3c8f7e2c2458f724edd6b',
+			'com.google.dagger:dagger:2.0.2:dagger-2.0.2.jar:84c0282ed8be73a29e0475d639da030b55dee72369e58dd35ae7d4fe6243dcf9',
+			'com.google.guava:guava:18.0:guava-18.0.jar:d664fbfc03d2e5ce9cab2a44fb01f1d0bf9dfebeccc1a473b1f9ea31f79f6f99',
+			'com.h2database:h2:1.4.192:h2-1.4.192.jar:225b22e9857235c46c93861410b60b8c81c10dc8985f4faf188985ba5445126c',
+			'com.madgag.spongycastle:core:1.58.0.0:core-1.58.0.0.jar:199617dd5698c5a9312b898c0a4cec7ce9dd8649d07f65d91629f58229d72728',
+			'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
+			'junit:junit:4.12:junit-4.12.jar:59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a',
+			'net.i2p.crypto:eddsa:0.2.0:eddsa-0.2.0.jar:a7cb1b85c16e2f0730b9204106929a1d9aaae1df728adc7041a8b8b605692140',
+			'org.apache.ant:ant-launcher:1.9.4:ant-launcher-1.9.4.jar:7bccea20b41801ca17bcbc909a78c835d0f443f12d639c77bd6ae3d05861608d',
+			'org.apache.ant:ant:1.9.4:ant-1.9.4.jar:649ae0730251de07b8913f49286d46bba7b92d47c5f332610aa426c4f02161d8',
+			'org.beanshell:bsh:1.3.0:bsh-1.3.0.jar:9b04edc75d19db54f1b4e8b5355e9364384c6cf71eb0a1b9724c159d779879f8',
+			'org.bitlet:weupnp:0.1.4:weupnp-0.1.4.jar:88df7e6504929d00bdb832863761385c68ab92af945b04f0770b126270a444fb',
+			'org.codehaus.mojo.signature:java16:1.1:java16-1.1.signature:53799223a2c98dba2d0add810bed76315460df285c69e4f397ae6098f87dd619',
+			'org.codehaus.mojo:animal-sniffer-ant-tasks:1.16:animal-sniffer-ant-tasks-1.16.jar:890040976fbe2d584619a6a61b1fd2e925b3b5eb342a85eb2762c467c0d64e90',
+			'org.codehaus.mojo:animal-sniffer:1.16:animal-sniffer-1.16.jar:72be8bcc226ba43b937c722a08a07852bfa1b11400089265d5df0ee7b38b1d52',
+			'org.hamcrest:hamcrest-core:1.3:hamcrest-core-1.3.jar:66fdef91e9739348df7a096aa384a5685f4e875584cce89386a7a47251c4d8e9',
+			'org.hamcrest:hamcrest-library:1.3:hamcrest-library-1.3.jar:711d64522f9ec410983bd310934296da134be4254a125080a0416ec178dfad1c',
+			'org.hsqldb:hsqldb:2.3.5:hsqldb-2.3.5.jar:6676a6977ac98997a80f827ddbd3fe8ca1e0853dad1492512135fd1a222ccfad',
+			'org.jmock:jmock-junit4:2.8.2:jmock-junit4-2.8.2.jar:f7ee4df4f7bd7b7f1cafad3b99eb74d579f109d5992ff625347352edb55e674c',
+			'org.jmock:jmock-legacy:2.8.2:jmock-legacy-2.8.2.jar:f2b985a5c08a9edb7f37612330c058809da3f6a6d63ce792426ebf8ff0d6d31b',
+			'org.jmock:jmock-testjar:2.8.2:jmock-testjar-2.8.2.jar:8900860f72c474e027cf97fe78dcbf154a1aa7fc62b6845c5fb4e4f3c7bc8760',
+			'org.jmock:jmock:2.8.2:jmock-2.8.2.jar:6c73cb4a2e6dbfb61fd99c9a768539c170ab6568e57846bd60dbf19596b65b16',
+			'org.objenesis:objenesis:2.1:objenesis-2.1.jar:c74330cc6b806c804fd37e74487b4fe5d7c2750c5e15fbc6efa13bdee1bdef80',
+			'org.ow2.asm:asm-all:5.2:asm-all-5.2.jar:7fbffbc1db3422e2101689fd88df8384b15817b52b9b2b267b9f6d2511dc198d',
+			'org.ow2.asm:asm:5.0.4:asm-5.0.4.jar:896618ed8ae62702521a78bc7be42b7c491a08e6920a15f89a3ecdec31e9a220',
+			'org.whispersystems:curve25519-java:0.4.1:curve25519-java-0.4.1.jar:7dd659d8822c06c3aea1a47f18fac9e5761e29cab8100030b877db445005f03e',
+	]
+}
+
+// needed to make test output available to bramble-j2se
 configurations {
 	testOutput.extendsFrom(testCompile)
 }

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}
@@ -20,6 +20,8 @@ import static org.briarproject.bramble.util.LogUtils.now;
 @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<>();
@@ -47,11 +49,11 @@ public class PoliteExecutor implements Executor {
 
 	@Override
 	public void execute(Runnable r) {
-		long submitted = now();
+		long submitted = System.currentTimeMillis();
 		Runnable wrapped = () -> {
-			if (log.isLoggable(FINE)) {
-				long queued = now() - submitted;
-				log.fine("Queue time " + queued + " ms");
+			if (log.isLoggable(LOG_LEVEL)) {
+				long queued = System.currentTimeMillis() - submitted;
+				log.log(LOG_LEVEL, "Queue time " + queued + " ms");
 			}
 			try {
 				r.run();

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

@@ -6,14 +6,16 @@ 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,
@@ -27,15 +29,15 @@ public class TimeLoggingExecutor extends ThreadPoolExecutor {
 
 	@Override
 	public void execute(Runnable r) {
-		if (log.isLoggable(FINE)) {
-			long submitted = now();
+		if (log.isLoggable(LOG_LEVEL)) {
+			long submitted = System.currentTimeMillis();
 			super.execute(() -> {
-				long started = now();
+				long started = System.currentTimeMillis();
 				long queued = started - submitted;
-				log.fine("Queue time " + queued + " ms");
+				log.log(LOG_LEVEL, "Queue time " + queued + " ms");
 				r.run();
-				long executing = now() - started;
-				log.fine("Execution time " + executing + " ms");
+				long executing = System.currentTimeMillis() - started;
+				log.log(LOG_LEVEL, "Execution time " + executing + " ms");
 			});
 		} else {
 			super.execute(r);

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

@@ -1,224 +0,0 @@
-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) {
-			if (hasDatabaseKey())
-				throw new AssertionError("Already have a database key");
-			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());
-			databaseKey = null;
-		}
-	}
-
-	@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

@@ -1,18 +0,0 @@
-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/client/ClientHelperImpl.java

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

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

@@ -46,7 +46,6 @@ 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;
 
@@ -123,7 +122,7 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 			in = conn.getReader().getInputStream();
 			out = conn.getWriter().getOutputStream();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			listener.contactExchangeFailed();
 			tryToClose(conn);
 			return;
@@ -134,7 +133,7 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 		try {
 			localProperties = transportPropertyManager.getLocalProperties();
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			listener.contactExchangeFailed();
 			tryToClose(conn);
 			return;
@@ -195,7 +194,7 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 				LOG.info("End of stream");
 			}
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			listener.contactExchangeFailed();
 			tryToClose(conn);
 			return;
@@ -223,11 +222,11 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 			LOG.info("Pseudonym exchange succeeded");
 			listener.contactExchangeSucceeded(remoteInfo.author);
 		} catch (ContactExistsException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			tryToClose(conn);
 			listener.duplicateContact(remoteInfo.author);
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			tryToClose(conn);
 			listener.contactExchangeFailed();
 		}
@@ -308,7 +307,7 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 			conn.getReader().dispose(true, true);
 			conn.getWriter().dispose(true);
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 

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

@@ -10,9 +10,6 @@ import org.briarproject.bramble.api.db.NoSuchContactException;
 import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorId;
-import org.briarproject.bramble.api.identity.AuthorInfo;
-import org.briarproject.bramble.api.identity.IdentityManager;
-import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.transport.KeyManager;
 
@@ -21,32 +18,21 @@ import java.util.Collection;
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
 
-import javax.annotation.Nullable;
 import javax.annotation.concurrent.ThreadSafe;
 import javax.inject.Inject;
 
-import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_AUTHOR_NAME_LENGTH;
-import static org.briarproject.bramble.api.identity.AuthorInfo.Status.OURSELVES;
-import static org.briarproject.bramble.api.identity.AuthorInfo.Status.UNKNOWN;
-import static org.briarproject.bramble.api.identity.AuthorInfo.Status.UNVERIFIED;
-import static org.briarproject.bramble.api.identity.AuthorInfo.Status.VERIFIED;
-import static org.briarproject.bramble.util.StringUtils.toUtf8;
-
 @ThreadSafe
 @NotNullByDefault
 class ContactManagerImpl implements ContactManager {
 
 	private final DatabaseComponent db;
 	private final KeyManager keyManager;
-	private final IdentityManager identityManager;
 	private final List<ContactHook> hooks;
 
 	@Inject
-	ContactManagerImpl(DatabaseComponent db, KeyManager keyManager,
-			IdentityManager identityManager) {
+	ContactManagerImpl(DatabaseComponent db, KeyManager keyManager) {
 		this.db = db;
 		this.keyManager = keyManager;
-		this.identityManager = identityManager;
 		hooks = new CopyOnWriteArrayList<>();
 	}
 
@@ -162,17 +148,6 @@ class ContactManagerImpl implements ContactManager {
 		db.setContactActive(txn, c, active);
 	}
 
-	@Override
-	public void setContactAlias(ContactId c, @Nullable String alias)
-			throws DbException {
-		if (alias != null) {
-			int aliasLength = toUtf8(alias).length;
-			if (aliasLength == 0 || aliasLength > MAX_AUTHOR_NAME_LENGTH)
-				throw new IllegalArgumentException();
-		}
-		db.transaction(false, txn -> db.setContactAlias(txn, c, alias));
-	}
-
 	@Override
 	public boolean contactExists(Transaction txn, AuthorId remoteAuthorId,
 			AuthorId localAuthorId) throws DbException {
@@ -201,23 +176,4 @@ class ContactManagerImpl implements ContactManager {
 		db.removeContact(txn, c);
 	}
 
-	@Override
-	public AuthorInfo getAuthorInfo(AuthorId a) throws DbException {
-		return db.transactionWithResult(true, txn -> getAuthorInfo(txn, a));
-	}
-
-	@Override
-	public AuthorInfo getAuthorInfo(Transaction txn, AuthorId authorId)
-			throws DbException {
-		LocalAuthor localAuthor = identityManager.getLocalAuthor(txn);
-		if (localAuthor.getId().equals(authorId))
-			return new AuthorInfo(OURSELVES);
-		Collection<Contact> contacts = db.getContactsByAuthorId(txn, authorId);
-		if (contacts.isEmpty()) return new AuthorInfo(UNKNOWN);
-		if (contacts.size() > 1) throw new AssertionError();
-		Contact c = contacts.iterator().next();
-		if (c.isVerified()) return new AuthorInfo(VERIFIED, c.getAlias());
-		else return new AuthorInfo(UNVERIFIED, c.getAlias());
-	}
-
 }

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

@@ -32,8 +32,6 @@ 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 {
@@ -129,14 +127,16 @@ class CryptoComponentImpl implements CryptoComponent {
 			throw new IllegalArgumentException();
 		if (!(pub instanceof Curve25519PublicKey))
 			throw new IllegalArgumentException();
-		long start = now();
+		long now = System.currentTimeMillis();
 		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();
-		logDuration(LOG, "Deriving shared secret", start);
+		long duration = System.currentTimeMillis() - now;
+		if (LOG.isLoggable(INFO))
+			LOG.info("Deriving shared secret took " + duration + " ms");
 		return secret;
 	}
 

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

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

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

@@ -16,8 +16,7 @@ import java.util.logging.Logger;
 
 import javax.annotation.concurrent.Immutable;
 
-import static org.briarproject.bramble.util.LogUtils.logDuration;
-import static org.briarproject.bramble.util.LogUtils.now;
+import static java.util.logging.Level.INFO;
 
 /**
  * A key parser that uses the encoding defined in "SEC 1: Elliptic Curve
@@ -49,7 +48,7 @@ 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 start = now();
+		long now = System.currentTimeMillis();
 		if (encodedKey.length != publicKeyBytes)
 			throw new GeneralSecurityException();
 		// The first byte must be 0x04
@@ -81,14 +80,16 @@ 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);
-		logDuration(LOG, "Parsing public key", start);
+		long duration = System.currentTimeMillis() - now;
+		if (LOG.isLoggable(INFO))
+			LOG.info("Parsing public key took " + duration + " ms");
 		return p;
 	}
 
 	@Override
 	public PrivateKey parsePrivateKey(byte[] encodedKey)
 			throws GeneralSecurityException {
-		long start = now();
+		long now = System.currentTimeMillis();
 		if (encodedKey.length != privateKeyBytes)
 			throw new GeneralSecurityException();
 		BigInteger d = new BigInteger(1, encodedKey); // Positive signum
@@ -98,7 +99,9 @@ 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);
-		logDuration(LOG, "Parsing private key", start);
+		long duration = System.currentTimeMillis() - now;
+		if (LOG.isLoggable(INFO))
+			LOG.info("Parsing private key took " + duration + " ms");
 		return p;
 	}
 }

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

@@ -2,11 +2,9 @@ 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;
-import org.briarproject.bramble.api.db.MessageDeletedException;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.identity.Author;
@@ -50,8 +48,7 @@ interface Database<T> {
 	 * @throws DataTooOldException if the data uses an older schema than the
 	 * current code and cannot be migrated
 	 */
-	boolean open(SecretKey key, @Nullable MigrationListener listener)
-			throws DbException;
+	boolean open(@Nullable MigrationListener listener) throws DbException;
 
 	/**
 	 * Prevents new transactions from starting, waits for all current
@@ -298,15 +295,6 @@ interface Database<T> {
 	 */
 	Collection<LocalAuthor> getLocalAuthors(T txn) throws DbException;
 
-	/**
-	 * Returns the message with the given ID.
-	 * <p/>
-	 * Read-only.
-	 *
-	 * @throws MessageDeletedException if the message has been deleted
-	 */
-	Message getMessage(T txn, MessageId m) throws DbException;
-
 	/**
 	 * Returns the IDs and states of all dependencies of the given message.
 	 * For missing dependencies and dependencies in other groups, the state
@@ -421,7 +409,7 @@ interface Database<T> {
 	 * Read-only.
 	 */
 	Collection<MessageId> getMessagesToOffer(T txn, ContactId c,
-			int maxMessages, int maxLatency) throws DbException;
+			int maxMessages) throws DbException;
 
 	/**
 	 * Returns the IDs of some messages that are eligible to be requested from
@@ -438,8 +426,8 @@ interface Database<T> {
 	 * <p/>
 	 * Read-only.
 	 */
-	Collection<MessageId> getMessagesToSend(T txn, ContactId c, int maxLength,
-			int maxLatency) throws DbException;
+	Collection<MessageId> getMessagesToSend(T txn, ContactId c, int maxLength)
+			throws DbException;
 
 	/**
 	 * Returns the IDs of any messages that need to be validated.
@@ -474,6 +462,15 @@ interface Database<T> {
 	 */
 	long getNextSendTime(T txn, ContactId c) throws DbException;
 
+	/**
+	 * Returns the message with the given ID, in serialised form, or null if
+	 * the message has been deleted.
+	 * <p/>
+	 * Read-only.
+	 */
+	@Nullable
+	byte[] getRawMessage(T txn, MessageId m) throws DbException;
+
 	/**
 	 * Returns the IDs of some messages that are eligible to be sent to the
 	 * given contact and have been requested by the contact, up to the given
@@ -482,7 +479,7 @@ interface Database<T> {
 	 * Read-only.
 	 */
 	Collection<MessageId> getRequestedMessagesToSend(T txn, ContactId c,
-			int maxLength, int maxLatency) throws DbException;
+			int maxLength) throws DbException;
 
 	/**
 	 * Returns all settings in the given namespace.
@@ -616,12 +613,6 @@ interface Database<T> {
 	void setContactActive(T txn, ContactId c, boolean active)
 			throws DbException;
 
-	/**
-	 * Sets an alias name for a contact.
-	 */
-	void setContactAlias(T txn, ContactId c, @Nullable String alias)
-			throws DbException;
-
 	/**
 	 * Sets the given group's visibility to the given contact to either
 	 * {@link Visibility VISIBLE} or {@link Visibility SHARED}.
@@ -650,14 +641,14 @@ 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, expiry time and estimated time of arrival
-	 * of the given message with respect to the given contact, using the latency
-	 * of the transport over which it was sent.
+	 * Updates the transmission count and expiry time of the given message
+	 * with respect to the given contact, using the latency of the transport
+	 * over which it was sent.
 	 */
-	void updateExpiryTimeAndEta(T txn, ContactId c, MessageId m, int maxLatency)
+	void updateExpiryTime(T txn, ContactId c, MessageId m, int maxLatency)
 			throws DbException;
 
 	/**

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

@@ -6,12 +6,9 @@ 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.DbCallable;
 import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.db.DbRunnable;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.db.NoSuchContactException;
@@ -71,15 +68,13 @@ 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
@@ -106,14 +101,14 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 	}
 
 	@Override
-	public boolean open(SecretKey key, @Nullable MigrationListener listener)
+	public boolean open(@Nullable MigrationListener listener)
 			throws DbException {
-		boolean reopened = db.open(key, listener);
+		boolean reopened = db.open(listener);
 		shutdown.addShutdownHook(() -> {
 			try {
 				close();
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 		return reopened;
@@ -130,13 +125,13 @@ 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 = now();
-		if (readOnly) {
-			lock.readLock().lock();
-			logDuration(LOG, "Waiting for read lock", start);
-		} else {
-			lock.writeLock().lock();
-			logDuration(LOG, "Waiting for write lock", start);
+		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");
 		}
 		try {
 			return new Transaction(db.startTransaction(), readOnly);
@@ -168,31 +163,6 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 			for (Event e : transaction.getEvents()) eventBus.broadcast(e);
 	}
 
-	@Override
-	public <E extends Exception> void transaction(boolean readOnly,
-			DbRunnable<E> task) throws DbException, E {
-		Transaction txn = startTransaction(readOnly);
-		try {
-			task.run(txn);
-			commitTransaction(txn);
-		} finally {
-			endTransaction(txn);
-		}
-	}
-
-	@Override
-	public <R, E extends Exception> R transactionWithResult(boolean readOnly,
-			DbCallable<R, E> task) throws DbException, E {
-		Transaction txn = startTransaction(readOnly);
-		try {
-			R result = task.call(txn);
-			commitTransaction(txn);
-			return result;
-		} finally {
-			endTransaction(txn);
-		}
-	}
-
 	private T unbox(Transaction transaction) {
 		if (transaction.isCommitted()) throw new IllegalStateException();
 		return txnClass.cast(transaction.unbox());
@@ -334,18 +304,17 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 
 	@Nullable
 	@Override
-	public Collection<Message> generateBatch(Transaction transaction,
+	public Collection<byte[]> generateBatch(Transaction transaction,
 			ContactId c, int maxLength, int maxLatency) throws DbException {
 		if (transaction.isReadOnly()) throw new IllegalArgumentException();
 		T txn = unbox(transaction);
 		if (!db.containsContact(txn, c))
 			throw new NoSuchContactException();
-		Collection<MessageId> ids =
-				db.getMessagesToSend(txn, c, maxLength, maxLatency);
-		List<Message> messages = new ArrayList<>(ids.size());
+		Collection<MessageId> ids = db.getMessagesToSend(txn, c, maxLength);
+		List<byte[]> messages = new ArrayList<>(ids.size());
 		for (MessageId m : ids) {
-			messages.add(db.getMessage(txn, m));
-			db.updateExpiryTimeAndEta(txn, c, m, maxLatency);
+			messages.add(db.getRawMessage(txn, m));
+			db.updateExpiryTime(txn, c, m, maxLatency);
 		}
 		if (ids.isEmpty()) return null;
 		db.lowerRequestedFlag(txn, c, ids);
@@ -361,11 +330,9 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		T txn = unbox(transaction);
 		if (!db.containsContact(txn, c))
 			throw new NoSuchContactException();
-		Collection<MessageId> ids =
-				db.getMessagesToOffer(txn, c, maxMessages, maxLatency);
+		Collection<MessageId> ids = db.getMessagesToOffer(txn, c, maxMessages);
 		if (ids.isEmpty()) return null;
-		for (MessageId m : ids)
-			db.updateExpiryTimeAndEta(txn, c, m, maxLatency);
+		for (MessageId m : ids) db.updateExpiryTime(txn, c, m, maxLatency);
 		return new Offer(ids);
 	}
 
@@ -386,18 +353,18 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 
 	@Nullable
 	@Override
-	public Collection<Message> generateRequestedBatch(Transaction transaction,
+	public Collection<byte[]> generateRequestedBatch(Transaction transaction,
 			ContactId c, int maxLength, int maxLatency) throws DbException {
 		if (transaction.isReadOnly()) throw new IllegalArgumentException();
 		T txn = unbox(transaction);
 		if (!db.containsContact(txn, c))
 			throw new NoSuchContactException();
-		Collection<MessageId> ids =
-				db.getRequestedMessagesToSend(txn, c, maxLength, maxLatency);
-		List<Message> messages = new ArrayList<>(ids.size());
+		Collection<MessageId> ids = db.getRequestedMessagesToSend(txn, c,
+				maxLength);
+		List<byte[]> messages = new ArrayList<>(ids.size());
 		for (MessageId m : ids) {
-			messages.add(db.getMessage(txn, m));
-			db.updateExpiryTimeAndEta(txn, c, m, maxLatency);
+			messages.add(db.getRawMessage(txn, m));
+			db.updateExpiryTime(txn, c, m, maxLatency);
 		}
 		if (ids.isEmpty()) return null;
 		db.lowerRequestedFlag(txn, c, ids);
@@ -487,15 +454,6 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		return db.getLocalAuthors(txn);
 	}
 
-	@Override
-	public Message getMessage(Transaction transaction, MessageId m)
-			throws DbException {
-		T txn = unbox(transaction);
-		if (!db.containsMessage(txn, m))
-			throw new NoSuchMessageException();
-		return db.getMessage(txn, m);
-	}
-
 	@Override
 	public Collection<MessageId> getMessageIds(Transaction transaction,
 			GroupId g) throws DbException {
@@ -526,6 +484,16 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		return db.getMessagesToShare(txn);
 	}
 
+	@Nullable
+	@Override
+	public byte[] getRawMessage(Transaction transaction, MessageId m)
+			throws DbException {
+		T txn = unbox(transaction);
+		if (!db.containsMessage(txn, m))
+			throw new NoSuchMessageException();
+		return db.getRawMessage(txn, m);
+	}
+
 	@Override
 	public Map<MessageId, Metadata> getMessageMetadata(Transaction transaction,
 			GroupId g) throws DbException {
@@ -685,7 +653,7 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		merged.putAll(s);
 		if (!merged.equals(old)) {
 			db.mergeSettings(txn, s, namespace);
-			transaction.attach(new SettingsUpdatedEvent(namespace, merged));
+			transaction.attach(new SettingsUpdatedEvent(namespace));
 		}
 	}
 
@@ -859,16 +827,6 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		transaction.attach(new ContactStatusChangedEvent(c, active));
 	}
 
-	@Override
-	public void setContactAlias(Transaction transaction, ContactId c,
-			String alias) throws DbException {
-		if (transaction.isReadOnly()) throw new IllegalArgumentException();
-		T txn = unbox(transaction);
-		if (!db.containsContact(txn, c))
-			throw new NoSuchContactException();
-		db.setContactAlias(txn, c, alias);
-	}
-
 	@Override
 	public void setGroupVisibility(Transaction transaction, ContactId c,
 			GroupId g, Visibility v) throws DbException {
@@ -895,8 +853,7 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		if (!db.containsMessage(txn, m))
 			throw new NoSuchMessageException();
 		if (db.getMessageState(txn, m) != DELIVERED)
-			throw new IllegalArgumentException(
-					"Shared undelivered message");
+			throw new IllegalArgumentException("Shared undelivered message");
 		db.setMessageShared(txn, m);
 		transaction.attach(new MessageSharedEvent(m));
 	}
@@ -922,8 +879,7 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 			throw new NoSuchMessageException();
 		State dependentState = db.getMessageState(txn, dependent.getId());
 		for (MessageId dependency : dependencies) {
-			db.addMessageDependency(txn, dependent, dependency,
-					dependentState);
+			db.addMessageDependency(txn, dependent, dependency, dependentState);
 		}
 	}
 
@@ -955,8 +911,7 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		T txn = unbox(transaction);
 		for (KeySet ks : keys) {
 			TransportId t = ks.getTransportKeys().getTransportId();
-			if (db.containsTransport(txn, t))
-				db.updateTransportKeys(txn, ks);
+			if (db.containsTransport(txn, t)) db.updateTransportKeys(txn, ks);
 		}
 	}
 }

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

@@ -2,8 +2,6 @@ package org.briarproject.bramble.db;
 
 import org.briarproject.bramble.api.settings.Settings;
 
-import static java.util.concurrent.TimeUnit.DAYS;
-
 interface DatabaseConstants {
 
 	/**
@@ -25,16 +23,4 @@ interface DatabaseConstants {
 	 */
 	String SCHEMA_VERSION_KEY = "schemaVersion";
 
-	/**
-	 * The {@link Settings} key under which the time of the last database
-	 * compaction is stored.
-	 */
-	String LAST_COMPACTED_KEY = "lastCompacted";
-
-	/**
-	 * The maximum time between database compactions in milliseconds. When the
-	 * database is opened it will be compacted if more than this amount of time
-	 * has passed since the last compaction.
-	 */
-	long MAX_COMPACTION_INTERVAL_MS = DAYS.toMillis(30);
 }

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

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

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

@@ -1,34 +0,0 @@
-package org.briarproject.bramble.db;
-
-class DatabaseTypes {
-
-	private final String hashType, secretType, binaryType;
-    private final String counterType, stringType;
-
-	public DatabaseTypes(String hashType, String secretType, String binaryType,
-			String counterType, String stringType) {
-		this.hashType = hashType;
-		this.secretType = secretType;
-		this.binaryType = binaryType;
-		this.counterType = counterType;
-		this.stringType = stringType;
-	}
-
-	/**
-	 * Replaces database type placeholders in a statement with the actual types.
-	 * These placeholders are currently supported:
-	 *	<li> _HASH
-	 *	<li> _SECRET
-	 *	<li> _BINARY
-	 *	<li> _COUNTER
-	 *	<li> _STRING
-	 */
-	String replaceTypes(String s) {
-		s = s.replaceAll("_HASH", hashType);
-		s = s.replaceAll("_SECRET", secretType);
-		s = s.replaceAll("_BINARY", binaryType);
-		s = s.replaceAll("_COUNTER", counterType);
-		s = s.replaceAll("_STRING", stringType);
-		return s;
-	}
-}

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

@@ -5,7 +5,6 @@ import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.util.StringUtils;
 
@@ -13,7 +12,6 @@ import java.io.File;
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.SQLException;
-import java.sql.Statement;
 import java.util.Properties;
 
 import javax.annotation.Nullable;
@@ -30,19 +28,14 @@ class H2Database extends JdbcDatabase {
 	private static final String BINARY_TYPE = "BINARY";
 	private static final String COUNTER_TYPE = "INT NOT NULL AUTO_INCREMENT";
 	private static final String STRING_TYPE = "VARCHAR";
-	private static final DatabaseTypes dbTypes = new DatabaseTypes(HASH_TYPE,
-			SECRET_TYPE, BINARY_TYPE, COUNTER_TYPE, STRING_TYPE);
 
 	private final DatabaseConfig config;
 	private final String url;
 
-	@Nullable
-	private volatile SecretKey key = null;
-
 	@Inject
-	H2Database(DatabaseConfig config, MessageFactory messageFactory,
-			Clock clock) {
-		super(dbTypes, messageFactory, clock);
+	H2Database(DatabaseConfig config, Clock clock) {
+		super(HASH_TYPE, SECRET_TYPE, BINARY_TYPE, COUNTER_TYPE, STRING_TYPE,
+				clock);
 		this.config = config;
 		File dir = config.getDatabaseDirectory();
 		String path = new File(dir, "db").getAbsolutePath();
@@ -51,11 +44,11 @@ class H2Database extends JdbcDatabase {
 	}
 
 	@Override
-	public boolean open(SecretKey key, @Nullable MigrationListener listener)
+	public boolean open(@Nullable MigrationListener listener)
 			throws DbException {
-		this.key = key;
-		boolean reopen = !config.getDatabaseDirectory().mkdirs();
-		super.open("org.h2.Driver", reopen, key, listener);
+		boolean reopen = config.databaseExists();
+		if (!reopen) config.getDatabaseDirectory().mkdirs();
+		super.open("org.h2.Driver", reopen, listener);
 		return reopen;
 	}
 
@@ -70,7 +63,7 @@ class H2Database extends JdbcDatabase {
 	}
 
 	@Override
-	public long getFreeSpace() {
+	public long getFreeSpace() throws DbException {
 		File dir = config.getDatabaseDirectory();
 		long maxSize = config.getMaxSize();
 		long free = dir.getFreeSpace();
@@ -95,7 +88,7 @@ class H2Database extends JdbcDatabase {
 
 	@Override
 	protected Connection createConnection() throws SQLException {
-		SecretKey key = this.key;
+		SecretKey key = config.getEncryptionKey();
 		if (key == null) throw new IllegalStateException();
 		Properties props = new Properties();
 		props.setProperty("user", "user");
@@ -108,22 +101,4 @@ class H2Database extends JdbcDatabase {
 	String getUrl() {
 		return url;
 	}
-
-	@Override
-	protected void compactAndClose() throws DbException {
-		Connection c = null;
-		Statement s = null;
-		try {
-			c = createConnection();
-			closeAllConnections();
-			s = c.createStatement();
-			s.execute("SHUTDOWN COMPACT");
-			s.close();
-			c.close();
-		} catch (SQLException e) {
-			tryToClose(s);
-			tryToClose(c);
-			throw new DbException(e);
-		}
-	}
 }

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

@@ -5,7 +5,6 @@ import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.util.StringUtils;
 
@@ -30,19 +29,14 @@ class HyperSqlDatabase extends JdbcDatabase {
 	private static final String COUNTER_TYPE =
 			"INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY(START WITH 1)";
 	private static final String STRING_TYPE = "VARCHAR";
-	private static final DatabaseTypes dbTypes = new DatabaseTypes(HASH_TYPE,
-			SECRET_TYPE, BINARY_TYPE, COUNTER_TYPE, STRING_TYPE);
 
 	private final DatabaseConfig config;
 	private final String url;
 
-	@Nullable
-	private volatile SecretKey key = null;
-
 	@Inject
-	HyperSqlDatabase(DatabaseConfig config, MessageFactory messageFactory,
-			Clock clock) {
-		super(dbTypes, messageFactory, clock);
+	HyperSqlDatabase(DatabaseConfig config, Clock clock) {
+		super(HASH_TYPE, SECRET_TYPE, BINARY_TYPE, COUNTER_TYPE, STRING_TYPE,
+				clock);
 		this.config = config;
 		File dir = config.getDatabaseDirectory();
 		String path = new File(dir, "db").getAbsolutePath();
@@ -52,34 +46,29 @@ class HyperSqlDatabase extends JdbcDatabase {
 	}
 
 	@Override
-	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);
+	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);
 		return reopen;
 	}
 
 	@Override
 	public void close() throws DbException {
-		Connection c = null;
-		Statement s = null;
 		try {
 			super.closeAllConnections();
-			c = createConnection();
-			s = c.createStatement();
+			Connection c = createConnection();
+			Statement s = c.createStatement();
 			s.executeQuery("SHUTDOWN");
 			s.close();
 			c.close();
 		} catch (SQLException e) {
-			tryToClose(s);
-			tryToClose(c);
 			throw new DbException(e);
 		}
 	}
 
 	@Override
-	public long getFreeSpace() {
+	public long getFreeSpace() throws DbException {
 		File dir = config.getDatabaseDirectory();
 		long maxSize = config.getMaxSize();
 		long free = dir.getFreeSpace();
@@ -104,27 +93,9 @@ class HyperSqlDatabase extends JdbcDatabase {
 
 	@Override
 	protected Connection createConnection() throws SQLException {
-		SecretKey key = this.key;
+		SecretKey key = config.getEncryptionKey();
 		if (key == null) throw new IllegalStateException();
 		String hex = StringUtils.toHexString(key.getBytes());
 		return DriverManager.getConnection(url + ";crypt_key=" + hex);
 	}
-
-	@Override
-	protected void compactAndClose() throws DbException {
-		Connection c = null;
-		Statement s = null;
-		try {
-			super.closeAllConnections();
-			c = createConnection();
-			s = c.createStatement();
-			s.executeQuery("SHUTDOWN COMPACT");
-			s.close();
-			c.close();
-		} catch (SQLException e) {
-			tryToClose(s);
-			tryToClose(c);
-			throw new DbException(e);
-		}
-	}
 }

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

@@ -7,7 +7,6 @@ import org.briarproject.bramble.api.db.DataTooNewException;
 import org.briarproject.bramble.api.db.DataTooOldException;
 import org.briarproject.bramble.api.db.DbClosedException;
 import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.db.MessageDeletedException;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.identity.Author;
@@ -21,7 +20,6 @@ import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.Group.Visibility;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.Message;
-import org.briarproject.bramble.api.sync.MessageFactory;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.MessageStatus;
 import org.briarproject.bramble.api.sync.ValidationManager.State;
@@ -38,7 +36,6 @@ import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
@@ -56,25 +53,19 @@ import java.util.logging.Logger;
 import javax.annotation.Nullable;
 
 import static java.sql.Types.INTEGER;
-import static java.sql.Types.VARCHAR;
+import static java.util.Collections.singletonList;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.db.Metadata.REMOVE;
 import static org.briarproject.bramble.api.sync.Group.Visibility.INVISIBLE;
 import static org.briarproject.bramble.api.sync.Group.Visibility.SHARED;
 import static org.briarproject.bramble.api.sync.Group.Visibility.VISIBLE;
-import static org.briarproject.bramble.api.sync.SyncConstants.MESSAGE_HEADER_LENGTH;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.DELIVERED;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.PENDING;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.UNKNOWN;
 import static org.briarproject.bramble.db.DatabaseConstants.DB_SETTINGS_NAMESPACE;
-import static org.briarproject.bramble.db.DatabaseConstants.LAST_COMPACTED_KEY;
-import static org.briarproject.bramble.db.DatabaseConstants.MAX_COMPACTION_INTERVAL_MS;
 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.logDuration;
-import static org.briarproject.bramble.util.LogUtils.logException;
-import static org.briarproject.bramble.util.LogUtils.now;
 
 /**
  * A generic database implementation that can be used with any JDBC-compatible
@@ -84,7 +75,7 @@ import static org.briarproject.bramble.util.LogUtils.now;
 abstract class JdbcDatabase implements Database<Connection> {
 
 	// Package access for testing
-	static final int CODE_SCHEMA_VERSION = 41;
+	static final int CODE_SCHEMA_VERSION = 39;
 
 	// Rotation period offsets for incoming transport keys
 	private static final int OFFSET_PREV = -1;
@@ -114,7 +105,6 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " authorId _HASH NOT NULL,"
 					+ " formatVersion INT NOT NULL,"
 					+ " name _STRING NOT NULL,"
-					+ " alias _STRING," // Null if no alias exists
 					+ " publicKey _BINARY NOT NULL,"
 					+ " localAuthorId _HASH NOT NULL,"
 					+ " verified BOOLEAN NOT NULL,"
@@ -225,7 +215,6 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " requested BOOLEAN NOT NULL,"
 					+ " expiry BIGINT NOT NULL,"
 					+ " txCount INT NOT NULL,"
-					+ " eta BIGINT NOT NULL,"
 					+ " PRIMARY KEY (messageId, contactId),"
 					+ " FOREIGN KEY (messageId)"
 					+ " REFERENCES messages (messageId)"
@@ -312,9 +301,9 @@ abstract class JdbcDatabase implements Database<Connection> {
 			Logger.getLogger(JdbcDatabase.class.getName());
 
 	// Different database libraries use different names for certain types
-	private final MessageFactory messageFactory;
+	private final String hashType, secretType, binaryType;
+	private final String counterType, stringType;
 	private final Clock clock;
-	private final DatabaseTypes dbTypes;
 
 	// Locking: connectionsLock
 	private final LinkedList<Connection> connections = new LinkedList<>();
@@ -322,21 +311,23 @@ abstract class JdbcDatabase implements Database<Connection> {
 	private int openConnections = 0; // Locking: connectionsLock
 	private boolean closed = false; // Locking: connectionsLock
 
+	@Nullable
 	protected abstract Connection createConnection() throws SQLException;
 
-	protected abstract void compactAndClose() throws DbException;
-
 	private final Lock connectionsLock = new ReentrantLock();
 	private final Condition connectionsChanged = connectionsLock.newCondition();
 
-	JdbcDatabase(DatabaseTypes databaseTypes, MessageFactory messageFactory,
-			Clock clock) {
-		this.dbTypes = databaseTypes;
-		this.messageFactory = messageFactory;
+	JdbcDatabase(String hashType, String secretType, String binaryType,
+			String counterType, String stringType, Clock clock) {
+		this.hashType = hashType;
+		this.secretType = secretType;
+		this.binaryType = binaryType;
+		this.counterType = counterType;
+		this.stringType = stringType;
 		this.clock = clock;
 	}
 
-	protected void open(String driverClass, boolean reopen, SecretKey key,
+	protected void open(String driverClass, boolean reopen,
 			@Nullable MigrationListener listener) throws DbException {
 		// Load the JDBC driver
 		try {
@@ -345,16 +336,13 @@ abstract class JdbcDatabase implements Database<Connection> {
 			throw new DbException(e);
 		}
 		// Open the database and create the tables and indexes if necessary
-		boolean compact;
 		Connection txn = startTransaction();
 		try {
 			if (reopen) {
-				Settings s = getSettings(txn, DB_SETTINGS_NAMESPACE);
-				compact = migrateSchema(txn, s, listener) || isCompactionDue(s);
+				checkSchemaVersion(txn, listener);
 			} else {
 				createTables(txn);
-				initialiseSettings(txn);
-				compact = false;
+				storeSchemaVersion(txn, CODE_SCHEMA_VERSION);
 			}
 			createIndexes(txn);
 			commitTransaction(txn);
@@ -362,25 +350,6 @@ abstract class JdbcDatabase implements Database<Connection> {
 			abortTransaction(txn);
 			throw e;
 		}
-		// Compact the database if necessary
-		if (compact) {
-			if (listener != null) listener.onDatabaseCompaction();
-			long start = now();
-			compactAndClose();
-			logDuration(LOG, "Compacting database", start);
-			// Allow the next transaction to reopen the DB
-			synchronized (connectionsLock) {
-				closed = false;
-			}
-			txn = startTransaction();
-			try {
-				storeLastCompacted(txn);
-				commitTransaction(txn);
-			} catch (DbException e) {
-				abortTransaction(txn);
-				throw e;
-			}
-		}
 	}
 
 	/**
@@ -388,18 +357,17 @@ abstract class JdbcDatabase implements Database<Connection> {
 	 * version used by the current code and applies any suitable migrations to
 	 * the data if necessary.
 	 *
-	 * @return true if any migrations were applied, false if the schema was
-	 * already current
 	 * @throws DataTooNewException if the data uses a newer schema than the
 	 * current code
 	 * @throws DataTooOldException if the data uses an older schema than the
 	 * current code and cannot be migrated
 	 */
-	private boolean migrateSchema(Connection txn, Settings s,
+	private void checkSchemaVersion(Connection txn,
 			@Nullable MigrationListener listener) throws DbException {
+		Settings s = getSettings(txn, DB_SETTINGS_NAMESPACE);
 		int dataSchemaVersion = s.getInt(SCHEMA_VERSION_KEY, -1);
 		if (dataSchemaVersion == -1) throw new DbException();
-		if (dataSchemaVersion == CODE_SCHEMA_VERSION) return false;
+		if (dataSchemaVersion == CODE_SCHEMA_VERSION) return;
 		if (CODE_SCHEMA_VERSION < dataSchemaVersion)
 			throw new DataTooNewException();
 		// Apply any suitable migrations in order
@@ -408,7 +376,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 			if (start == dataSchemaVersion) {
 				if (LOG.isLoggable(INFO))
 					LOG.info("Migrating from schema " + start + " to " + end);
-				if (listener != null) listener.onDatabaseMigration();
+				if (listener != null) listener.onMigrationRun();
 				// Apply the migration
 				m.migrate(txn);
 				// Store the new schema version
@@ -418,24 +386,11 @@ abstract class JdbcDatabase implements Database<Connection> {
 		}
 		if (dataSchemaVersion != CODE_SCHEMA_VERSION)
 			throw new DataTooOldException();
-		return true;
 	}
 
 	// Package access for testing
 	List<Migration<Connection>> getMigrations() {
-		return Arrays.asList(
-				new Migration38_39(),
-				new Migration39_40(),
-				new Migration40_41(dbTypes)
-		);
-	}
-
-	private boolean isCompactionDue(Settings s) {
-		long lastCompacted = s.getLong(LAST_COMPACTED_KEY, 0);
-		long elapsed = clock.currentTimeMillis() - lastCompacted;
-		if (LOG.isLoggable(INFO))
-			LOG.info(elapsed + " ms since last compaction");
-		return elapsed > MAX_COMPACTION_INTERVAL_MS;
+		return singletonList(new Migration38_39());
 	}
 
 	private void storeSchemaVersion(Connection txn, int version)
@@ -445,40 +400,19 @@ abstract class JdbcDatabase implements Database<Connection> {
 		mergeSettings(txn, s, DB_SETTINGS_NAMESPACE);
 	}
 
-	private void storeLastCompacted(Connection txn) throws DbException {
-		Settings s = new Settings();
-		s.putLong(LAST_COMPACTED_KEY, clock.currentTimeMillis());
-		mergeSettings(txn, s, DB_SETTINGS_NAMESPACE);
-	}
-
-	private void initialiseSettings(Connection txn) throws DbException {
-		Settings s = new Settings();
-		s.putInt(SCHEMA_VERSION_KEY, CODE_SCHEMA_VERSION);
-		s.putLong(LAST_COMPACTED_KEY, clock.currentTimeMillis());
-		mergeSettings(txn, s, DB_SETTINGS_NAMESPACE);
-	}
-
 	private void tryToClose(@Nullable ResultSet rs) {
 		try {
 			if (rs != null) rs.close();
 		} catch (SQLException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
-	protected void tryToClose(@Nullable Statement s) {
+	private void tryToClose(@Nullable Statement s) {
 		try {
 			if (s != null) s.close();
 		} catch (SQLException e) {
-			logException(LOG, WARNING, e);
-		}
-	}
-
-	protected void tryToClose(@Nullable Connection c) {
-		try {
-			if (c != null) c.close();
-		} catch (SQLException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -486,20 +420,20 @@ abstract class JdbcDatabase implements Database<Connection> {
 		Statement s = null;
 		try {
 			s = txn.createStatement();
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_SETTINGS));
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_LOCAL_AUTHORS));
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_CONTACTS));
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_GROUPS));
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_GROUP_METADATA));
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_GROUP_VISIBILITIES));
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_MESSAGES));
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_MESSAGE_METADATA));
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_MESSAGE_DEPENDENCIES));
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_OFFERS));
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_STATUSES));
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_TRANSPORTS));
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_OUTGOING_KEYS));
-			s.executeUpdate(dbTypes.replaceTypes(CREATE_INCOMING_KEYS));
+			s.executeUpdate(insertTypeNames(CREATE_SETTINGS));
+			s.executeUpdate(insertTypeNames(CREATE_LOCAL_AUTHORS));
+			s.executeUpdate(insertTypeNames(CREATE_CONTACTS));
+			s.executeUpdate(insertTypeNames(CREATE_GROUPS));
+			s.executeUpdate(insertTypeNames(CREATE_GROUP_METADATA));
+			s.executeUpdate(insertTypeNames(CREATE_GROUP_VISIBILITIES));
+			s.executeUpdate(insertTypeNames(CREATE_MESSAGES));
+			s.executeUpdate(insertTypeNames(CREATE_MESSAGE_METADATA));
+			s.executeUpdate(insertTypeNames(CREATE_MESSAGE_DEPENDENCIES));
+			s.executeUpdate(insertTypeNames(CREATE_OFFERS));
+			s.executeUpdate(insertTypeNames(CREATE_STATUSES));
+			s.executeUpdate(insertTypeNames(CREATE_TRANSPORTS));
+			s.executeUpdate(insertTypeNames(CREATE_OUTGOING_KEYS));
+			s.executeUpdate(insertTypeNames(CREATE_INCOMING_KEYS));
 			s.close();
 		} catch (SQLException e) {
 			tryToClose(s);
@@ -524,6 +458,15 @@ abstract class JdbcDatabase implements Database<Connection> {
 		}
 	}
 
+	private String insertTypeNames(String s) {
+		s = s.replaceAll("_HASH", hashType);
+		s = s.replaceAll("_SECRET", secretType);
+		s = s.replaceAll("_BINARY", binaryType);
+		s = s.replaceAll("_COUNTER", counterType);
+		s = s.replaceAll("_STRING", stringType);
+		return s;
+	}
+
 	@Override
 	public Connection startTransaction() throws DbException {
 		Connection txn;
@@ -538,6 +481,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 			if (txn == null) {
 				// Open a new connection
 				txn = createConnection();
+				if (txn == null) throw new DbException();
 				txn.setAutoCommit(false);
 				connectionsLock.lock();
 				try {
@@ -565,11 +509,12 @@ abstract class JdbcDatabase implements Database<Connection> {
 			}
 		} catch (SQLException e) {
 			// Try to close the connection
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			try {
 				txn.close();
 			} catch (SQLException e1) {
-				logException(LOG, WARNING, e1);
+				if (LOG.isLoggable(WARNING))
+					LOG.log(WARNING, e1.toString(), e1);
 			}
 			// Whatever happens, allow the database to close
 			connectionsLock.lock();
@@ -781,7 +726,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 			ps.setLong(3, m.getTimestamp());
 			ps.setInt(4, state.getValue());
 			ps.setBoolean(5, messageShared);
-			byte[] raw = messageFactory.getRawMessage(m);
+			byte[] raw = m.getRaw();
 			ps.setInt(6, raw.length);
 			ps.setBytes(7, raw);
 			int affected = ps.executeUpdate();
@@ -795,7 +740,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 				boolean offered = removeOfferedMessage(txn, c, m.getId());
 				boolean seen = offered || (sender != null && c.equals(sender));
 				addStatus(txn, m.getId(), c, m.getGroupId(), m.getTimestamp(),
-						raw.length, state, e.getValue(), messageShared,
+						m.getLength(), state, e.getValue(), messageShared,
 						false, seen);
 			}
 			// Update denormalised column in messageDependencies if dependency
@@ -854,9 +799,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 		try {
 			String sql = "INSERT INTO statuses (messageId, contactId, groupId,"
 					+ " timestamp, length, state, groupShared, messageShared,"
-					+ " deleted, ack, seen, requested, expiry, txCount, eta)"
-					+ " VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, FALSE, 0, 0,"
-					+ " 0)";
+					+ " deleted, ack, seen, requested, expiry, txCount)"
+					+ " VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, FALSE, 0, 0)";
 			ps = txn.prepareStatement(sql);
 			ps.setBytes(1, m.getBytes());
 			ps.setInt(2, c.getInt());
@@ -1249,8 +1193,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
-			String sql = "SELECT authorId, formatVersion, name, alias,"
-					+ " publicKey, localAuthorId, verified, active"
+			String sql = "SELECT authorId, formatVersion, name, publicKey,"
+					+ " localAuthorId, verified, active"
 					+ " FROM contacts"
 					+ " WHERE contactId = ?";
 			ps = txn.prepareStatement(sql);
@@ -1260,17 +1204,15 @@ abstract class JdbcDatabase implements Database<Connection> {
 			AuthorId authorId = new AuthorId(rs.getBytes(1));
 			int formatVersion = rs.getInt(2);
 			String name = rs.getString(3);
-			String alias = rs.getString(4);
-			byte[] publicKey = rs.getBytes(5);
-			AuthorId localAuthorId = new AuthorId(rs.getBytes(6));
-			boolean verified = rs.getBoolean(7);
-			boolean active = rs.getBoolean(8);
+			byte[] publicKey = rs.getBytes(4);
+			AuthorId localAuthorId = new AuthorId(rs.getBytes(5));
+			boolean verified = rs.getBoolean(6);
+			boolean active = rs.getBoolean(7);
 			rs.close();
 			ps.close();
 			Author author =
 					new Author(authorId, formatVersion, name, publicKey);
-			return new Contact(c, author, localAuthorId, alias, verified,
-					active);
+			return new Contact(c, author, localAuthorId, verified, active);
 		} catch (SQLException e) {
 			tryToClose(rs);
 			tryToClose(ps);
@@ -1285,7 +1227,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 		ResultSet rs = null;
 		try {
 			String sql = "SELECT contactId, authorId, formatVersion, name,"
-					+ " alias, publicKey, localAuthorId, verified, active"
+					+ " publicKey, localAuthorId, verified, active"
 					+ " FROM contacts";
 			ps = txn.prepareStatement(sql);
 			rs = ps.executeQuery();
@@ -1295,15 +1237,14 @@ abstract class JdbcDatabase implements Database<Connection> {
 				AuthorId authorId = new AuthorId(rs.getBytes(2));
 				int formatVersion = rs.getInt(3);
 				String name = rs.getString(4);
-				String alias = rs.getString(5);
-				byte[] publicKey = rs.getBytes(6);
+				byte[] publicKey = rs.getBytes(5);
 				Author author =
 						new Author(authorId, formatVersion, name, publicKey);
-				AuthorId localAuthorId = new AuthorId(rs.getBytes(7));
-				boolean verified = rs.getBoolean(8);
-				boolean active = rs.getBoolean(9);
+				AuthorId localAuthorId = new AuthorId(rs.getBytes(6));
+				boolean verified = rs.getBoolean(7);
+				boolean active = rs.getBoolean(8);
 				contacts.add(new Contact(contactId, author, localAuthorId,
-						alias, verified, active));
+						verified, active));
 			}
 			rs.close();
 			ps.close();
@@ -1344,8 +1285,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
-			String sql = "SELECT contactId, formatVersion, name, alias,"
-					+ " publicKey, localAuthorId, verified, active"
+			String sql = "SELECT contactId, formatVersion, name, publicKey,"
+					+ " localAuthorId, verified, active"
 					+ " FROM contacts"
 					+ " WHERE authorId = ?";
 			ps = txn.prepareStatement(sql);
@@ -1356,15 +1297,14 @@ abstract class JdbcDatabase implements Database<Connection> {
 				ContactId c = new ContactId(rs.getInt(1));
 				int formatVersion = rs.getInt(2);
 				String name = rs.getString(3);
-				String alias = rs.getString(4);
-				byte[] publicKey = rs.getBytes(5);
-				AuthorId localAuthorId = new AuthorId(rs.getBytes(6));
-				boolean verified = rs.getBoolean(7);
-				boolean active = rs.getBoolean(8);
+				byte[] publicKey = rs.getBytes(4);
+				AuthorId localAuthorId = new AuthorId(rs.getBytes(5));
+				boolean verified = rs.getBoolean(6);
+				boolean active = rs.getBoolean(7);
 				Author author =
 						new Author(remote, formatVersion, name, publicKey);
-				contacts.add(new Contact(c, author, localAuthorId, alias,
-						verified, active));
+				contacts.add(new Contact(c, author, localAuthorId, verified,
+						active));
 			}
 			rs.close();
 			ps.close();
@@ -1542,35 +1482,6 @@ abstract class JdbcDatabase implements Database<Connection> {
 		}
 	}
 
-	@Override
-	public Message getMessage(Connection txn, MessageId m) throws DbException {
-		PreparedStatement ps = null;
-		ResultSet rs = null;
-		try {
-			String sql = "SELECT groupId, timestamp, raw FROM messages"
-					+ " WHERE messageId = ?";
-			ps = txn.prepareStatement(sql);
-			ps.setBytes(1, m.getBytes());
-			rs = ps.executeQuery();
-			if (!rs.next()) throw new DbStateException();
-			GroupId g = new GroupId(rs.getBytes(1));
-			long timestamp = rs.getLong(2);
-			byte[] raw = rs.getBytes(3);
-			if (rs.next()) throw new DbStateException();
-			rs.close();
-			ps.close();
-			if (raw == null) throw new MessageDeletedException();
-			if (raw.length <= MESSAGE_HEADER_LENGTH) throw new AssertionError();
-			byte[] body = new byte[raw.length - MESSAGE_HEADER_LENGTH];
-			System.arraycopy(raw, MESSAGE_HEADER_LENGTH, body, 0, body.length);
-			return new Message(m, g, timestamp, body);
-		} catch (SQLException e) {
-			tryToClose(rs);
-			tryToClose(ps);
-			throw new DbException(e);
-		}
-	}
-
 	@Override
 	public Collection<MessageId> getMessageIds(Connection txn, GroupId g)
 			throws DbException {
@@ -1923,9 +1834,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	@Override
 	public Collection<MessageId> getMessagesToOffer(Connection txn,
-			ContactId c, int maxMessages, int maxLatency) throws DbException {
+			ContactId c, int maxMessages) throws DbException {
 		long now = clock.currentTimeMillis();
-		long eta = now + maxLatency;
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
@@ -1934,14 +1844,13 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " AND groupShared = TRUE AND messageShared = TRUE"
 					+ " AND deleted = FALSE"
 					+ " AND seen = FALSE AND requested = FALSE"
-					+ " AND (expiry <= ? OR eta > ?)"
+					+ " AND expiry < ?"
 					+ " ORDER BY timestamp LIMIT ?";
 			ps = txn.prepareStatement(sql);
 			ps.setInt(1, c.getInt());
 			ps.setInt(2, DELIVERED.getValue());
 			ps.setLong(3, now);
-			ps.setLong(4, eta);
-			ps.setInt(5, maxMessages);
+			ps.setInt(4, maxMessages);
 			rs = ps.executeQuery();
 			List<MessageId> ids = new ArrayList<>();
 			while (rs.next()) ids.add(new MessageId(rs.getBytes(1)));
@@ -1982,9 +1891,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	@Override
 	public Collection<MessageId> getMessagesToSend(Connection txn, ContactId c,
-			int maxLength, int maxLatency) throws DbException {
+			int maxLength) throws DbException {
 		long now = clock.currentTimeMillis();
-		long eta = now + maxLatency;
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
@@ -1993,13 +1901,12 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " AND groupShared = TRUE AND messageShared = TRUE"
 					+ " AND deleted = FALSE"
 					+ " AND seen = FALSE"
-					+ " AND (expiry <= ? OR eta > ?)"
+					+ " AND expiry < ?"
 					+ " ORDER BY timestamp";
 			ps = txn.prepareStatement(sql);
 			ps.setInt(1, c.getInt());
 			ps.setInt(2, DELIVERED.getValue());
 			ps.setLong(3, now);
-			ps.setLong(4, eta);
 			rs = ps.executeQuery();
 			List<MessageId> ids = new ArrayList<>();
 			int total = 0;
@@ -2111,11 +2018,34 @@ abstract class JdbcDatabase implements Database<Connection> {
 		}
 	}
 
+	@Override
+	@Nullable
+	public byte[] getRawMessage(Connection txn, MessageId m)
+			throws DbException {
+		PreparedStatement ps = null;
+		ResultSet rs = null;
+		try {
+			String sql = "SELECT raw FROM messages WHERE messageId = ?";
+			ps = txn.prepareStatement(sql);
+			ps.setBytes(1, m.getBytes());
+			rs = ps.executeQuery();
+			if (!rs.next()) throw new DbStateException();
+			byte[] raw = rs.getBytes(1);
+			if (rs.next()) throw new DbStateException();
+			rs.close();
+			ps.close();
+			return raw;
+		} catch (SQLException e) {
+			tryToClose(rs);
+			tryToClose(ps);
+			throw new DbException(e);
+		}
+	}
+
 	@Override
 	public Collection<MessageId> getRequestedMessagesToSend(Connection txn,
-			ContactId c, int maxLength, int maxLatency) throws DbException {
+			ContactId c, int maxLength) throws DbException {
 		long now = clock.currentTimeMillis();
-		long eta = now + maxLatency;
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
@@ -2124,13 +2054,12 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " AND groupShared = TRUE AND messageShared = TRUE"
 					+ " AND deleted = FALSE"
 					+ " AND seen = FALSE AND requested = TRUE"
-					+ " AND (expiry <= ? OR eta > ?)"
+					+ " AND expiry < ?"
 					+ " ORDER BY timestamp";
 			ps = txn.prepareStatement(sql);
 			ps.setInt(1, c.getInt());
 			ps.setInt(2, DELIVERED.getValue());
 			ps.setLong(3, now);
-			ps.setLong(4, eta);
 			rs = ps.executeQuery();
 			List<MessageId> ids = new ArrayList<>();
 			int total = 0;
@@ -2789,25 +2718,6 @@ abstract class JdbcDatabase implements Database<Connection> {
 		}
 	}
 
-	@Override
-	public void setContactAlias(Connection txn, ContactId c,
-			@Nullable String alias) throws DbException {
-		PreparedStatement ps = null;
-		try {
-			String sql = "UPDATE contacts SET alias = ? WHERE contactId = ?";
-			ps = txn.prepareStatement(sql);
-			if (alias == null) ps.setNull(1, VARCHAR);
-			else ps.setString(1, alias);
-			ps.setInt(2, c.getInt());
-			int affected = ps.executeUpdate();
-			if (affected < 0 || affected > 1) throw new DbStateException();
-			ps.close();
-		} catch (SQLException e) {
-			tryToClose(ps);
-			throw new DbException(e);
-		}
-	}
-
 	@Override
 	public void setGroupVisibility(Connection txn, ContactId c, GroupId g,
 			boolean shared) throws DbException {
@@ -2960,7 +2870,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 	}
 
 	@Override
-	public void updateExpiryTimeAndEta(Connection txn, ContactId c, MessageId m,
+	public void updateExpiryTime(Connection txn, ContactId c, MessageId m,
 			int maxLatency) throws DbException {
 		PreparedStatement ps = null;
 		ResultSet rs = null;
@@ -2976,16 +2886,13 @@ abstract class JdbcDatabase implements Database<Connection> {
 			if (rs.next()) throw new DbStateException();
 			rs.close();
 			ps.close();
-			sql = "UPDATE statuses"
-					+ " SET expiry = ?, txCount = txCount + 1, eta = ?"
+			sql = "UPDATE statuses SET expiry = ?, txCount = txCount + 1"
 					+ " WHERE messageId = ? AND contactId = ?";
 			ps = txn.prepareStatement(sql);
 			long now = clock.currentTimeMillis();
-			long eta = now + maxLatency;
 			ps.setLong(1, calculateExpiry(now, maxLatency, txCount));
-			ps.setLong(2, eta);
-			ps.setBytes(3, m.getBytes());
-			ps.setInt(4, c.getInt());
+			ps.setBytes(2, m.getBytes());
+			ps.setInt(3, c.getInt());
 			int affected = ps.executeUpdate();
 			if (affected != 1) throw new DbStateException();
 			ps.close();

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

@@ -10,7 +10,6 @@ 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> {
 
@@ -49,7 +48,7 @@ class Migration38_39 implements Migration<Connection> {
 		try {
 			if (s != null) s.close();
 		} catch (SQLException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 }

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

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

bramble-core/src/main/java/org/briarproject/bramble/db/Migration40_41.java

@@ -1,56 +0,0 @@
-package org.briarproject.bramble.db;
-
-import org.briarproject.bramble.api.db.DbException;
-
-import java.sql.Connection;
-import java.sql.SQLException;
-import java.sql.Statement;
-import java.util.logging.Logger;
-
-import javax.annotation.Nullable;
-
-import static java.util.logging.Level.WARNING;
-import static java.util.logging.Logger.getLogger;
-import static org.briarproject.bramble.util.LogUtils.logException;
-
-class Migration40_41 implements Migration<Connection> {
-
-	private static final Logger LOG = getLogger(Migration40_41.class.getName());
-
-	private final DatabaseTypes dbTypes;
-
-	public Migration40_41(DatabaseTypes databaseTypes) {
-		this.dbTypes = databaseTypes;
-	}
-
-	@Override
-	public int getStartVersion() {
-		return 40;
-	}
-
-	@Override
-	public int getEndVersion() {
-		return 41;
-	}
-
-	@Override
-	public void migrate(Connection txn) throws DbException {
-		Statement s = null;
-		try {
-			s = txn.createStatement();
-			s.execute("ALTER TABLE contacts"
-					+ dbTypes.replaceTypes(" ADD alias VARCHAR"));
-		} catch (SQLException e) {
-			tryToClose(s);
-			throw new DbException(e);
-		}
-	}
-
-	private void tryToClose(@Nullable Statement s) {
-		try {
-			if (s != null) s.close();
-		} catch (SQLException e) {
-			logException(LOG, WARNING, e);
-		}
-	}
-}

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

@@ -1,23 +1,26 @@
 package org.briarproject.bramble.identity;
 
-import org.briarproject.bramble.api.crypto.CryptoComponent;
-import org.briarproject.bramble.api.crypto.KeyPair;
+import org.briarproject.bramble.api.contact.Contact;
 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.AuthorFactory;
+import org.briarproject.bramble.api.identity.Author.Status;
+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.api.nullsafety.NotNullByDefault;
 
+import java.util.Collection;
 import java.util.logging.Logger;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.ThreadSafe;
 import javax.inject.Inject;
 
-import static org.briarproject.bramble.util.LogUtils.logDuration;
-import static org.briarproject.bramble.util.LogUtils.now;
+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;
 
 @ThreadSafe
 @NotNullByDefault
@@ -27,51 +30,25 @@ 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, CryptoComponent crypto,
-			AuthorFactory authorFactory) {
+	IdentityManagerImpl(DatabaseComponent db) {
 		this.db = db;
-		this.crypto = crypto;
-		this.authorFactory = authorFactory;
 	}
 
 	@Override
-	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;
-		}
+	public void registerLocalAuthor(LocalAuthor localAuthor)
+			throws DbException {
 		Transaction txn = db.startTransaction(false);
 		try {
-			db.addLocalAuthor(txn, cached);
+			db.addLocalAuthor(txn, localAuthor);
 			db.commitTransaction(txn);
-			LOG.info("Local author stored");
+			cachedAuthor = localAuthor;
+			LOG.info("Local author registered");
 		} finally {
 			db.endTransaction(txn);
 		}
@@ -110,4 +87,26 @@ class IdentityManagerImpl implements IdentityManager {
 		return db.getLocalAuthors(txn).iterator().next();
 	}
 
+	@Override
+	public Status getAuthorStatus(AuthorId authorId) throws DbException {
+		Transaction txn = db.startTransaction(true);
+		try {
+			return getAuthorStatus(txn, authorId);
+		} finally {
+			db.endTransaction(txn);
+		}
+	}
+
+	@Override
+	public Status getAuthorStatus(Transaction txn, AuthorId authorId)
+			throws DbException {
+		if (getLocalAuthor(txn).getId().equals(authorId)) return OURSELVES;
+		Collection<Contact> contacts = db.getContactsByAuthorId(txn, authorId);
+		if (contacts.isEmpty()) return UNKNOWN;
+		for (Contact c : contacts) {
+			if (c.isVerified()) return VERIFIED;
+		}
+		return UNVERIFIED;
+	}
+
 }

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

@@ -31,7 +31,6 @@ 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 {
@@ -135,7 +134,7 @@ class KeyAgreementConnector {
 			Thread.currentThread().interrupt();
 			return null;
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return null;
 		} finally {
 			stopListening();

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

@@ -28,7 +28,6 @@ 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
@@ -102,7 +101,6 @@ class KeyAgreementTaskImpl extends Thread implements KeyAgreementTask,
 		KeyAgreementTransport transport =
 				connector.connect(remotePayload, alice);
 		if (transport == null) {
-			LOG.warning("Key agreement failed. Transport was null.");
 			// Notify caller that the connection failed
 			eventBus.broadcast(new KeyAgreementFailedEvent());
 			return;
@@ -122,11 +120,13 @@ class KeyAgreementTaskImpl extends Thread implements KeyAgreementTask,
 			// Broadcast result to caller
 			eventBus.broadcast(new KeyAgreementFinishedEvent(result));
 		} catch (AbortException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING))
+				LOG.log(WARNING, e.toString(), e);
 			// Notify caller that the protocol was aborted
 			eventBus.broadcast(new KeyAgreementAbortedEvent(e.receivedAbort));
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING))
+				LOG.log(WARNING, e.toString(), e);
 			// Notify caller that the connection failed
 			eventBus.broadcast(new KeyAgreementFailedEvent());
 		}