Add a bunch of tests highlighting implicit acks

Automatically decline incoming blog/forum invitations when they self-destruct

See merge request briar/briar!1392

.gitignore

@@ -18,7 +18,6 @@ local.properties
 
 # Android Studio
 .idea/*
-!.idea/inspectionProfiles/
 !.idea/runConfigurations/
 !.idea/codeStyleSettings.xml
 !.idea/codeStyles

.gitlab-ci.yml

@@ -1,122 +1,64 @@
 image: briar/ci-image-android:latest
 
 stages:
-  - test
+- test
-  - optional_tests
+- optional_tests
-  - check_reproducibility
+- check_reproducibility
 
-variables:
+test:
-  GIT_SUBMODULE_STRATEGY: recursive
+  stage: test
-
-workflow:
-  # when to create a CI pipeline
-  rules:
-    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
-    - if: '$CI_COMMIT_BRANCH && $CI_OPEN_MERGE_REQUESTS'
-      when: never # avoids duplicate jobs for branch and MR
-    - if: '$CI_COMMIT_BRANCH'
-    - if: '$CI_COMMIT_TAG'
-
-.base-test:
   before_script:
     - set -e
     - export GRADLE_USER_HOME=$PWD/.gradle
+
   cache:
-    key: "$CI_COMMIT_REF_SLUG"
     paths:
       - .gradle/wrapper
       - .gradle/caches
+
+  script:
+    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom animalSnifferMain animalSnifferTest
+    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom check compileOfficialDebugAndroidTestSources compileScreenshotDebugAndroidTestSources
+
   after_script:
-    # these file change every time and should not be cached
+    # these file change every time but should not be cached
     - rm -f $GRADLE_USER_HOME/caches/modules-2/modules-2.lock
     - rm -fr $GRADLE_USER_HOME/caches/*/plugin-resolution/
 
-test:
-  extends: .base-test
-  stage: test
-  script:
-    - git submodule update
-    - ./gradlew -Djava.security.egd=file:/dev/urandom animalSnifferMain animalSnifferTest
-    - ./gradlew -Djava.security.egd=file:/dev/urandom assembleOfficialDebug :briar-headless:linuxJars
-    - ./gradlew -Djava.security.egd=file:/dev/urandom compileOfficialDebugAndroidTestSources compileScreenshotDebugAndroidTestSources check
-  rules:
-    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
-      when: always
-    - when: always
-
-android test:
-  extends: .base-test
-  stage: optional_tests
-  image: briar/ci-image-android-emulator:latest
-  script:
-    # start emulator first, so it can fail early
-    - start-emulator.sh
-    # run normal and screenshot tests together (exclude Large tests)
-    - ./gradlew -Djava.security.egd=file:/dev/urandom connectedAndroidTest -Pandroid.testInstrumentationRunnerArguments.package=org.briarproject.briar.android -Pandroid.testInstrumentationRunnerArguments.notAnnotation=androidx.test.filters.LargeTest
-  after_script:
-    - adb pull /sdcard/Pictures/screenshots
-  artifacts:
-    name: "${CI_PROJECT_PATH}_${CI_JOB_STAGE}_${CI_COMMIT_REF_NAME}_${CI_COMMIT_SHA}"
-    paths:
-      - kernel.log
-      - logcat.txt
-      - briar-android/build/reports/androidTests/connected/flavors/*
-      - screenshots
-    expire_in: 3 days
-    when: on_failure
-  rules:
-    - if: '$CI_PIPELINE_SOURCE == "schedule"'
-      when: manual
-    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
-      changes:
-        - briar-android/**/*
-      when: manual
-      allow_failure: true
-    - if: '$CI_COMMIT_TAG == null'
-      when: manual
-      allow_failure: true
-  retry:
-    max: 1
-  tags:
-    - kvm
 
 test_reproducible:
   stage: check_reproducibility
   script:
-    - "curl -X POST -F token=${RELEASE_CHECK_TOKEN} -F ref=master -F variables[APP]='briar' -F variables[RELEASE_TAG]=${CI_COMMIT_REF_NAME} https://code.briarproject.org/api/v4/projects/61/trigger/pipeline"
+    - "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"
-    - "curl -X POST -F token=${RELEASE_JAR_CHECK_TOKEN} -F ref=main -F variables[APP]='briar-headless' -F variables[RELEASE_TAG]=${CI_COMMIT_REF_NAME} https://code.briarproject.org/api/v4/projects/307/trigger/pipeline"
   only:
     - tags
 
 .optional_tests:
   stage: optional_tests
-  extends: .base-test
+  before_script:
+    - set -e
+    - export GRADLE_USER_HOME=$PWD/.gradle
+
+  cache:
+    paths:
+      - .gradle/wrapper
+      - .gradle/caches
 
-bridge test:
-  extends: .optional_tests
-  rules:
-    - if: '$CI_PIPELINE_SOURCE == "schedule"'
-      when: on_success
-      allow_failure: false
-    - if: '$CI_COMMIT_TAG == null'
-      when: manual
-      allow_failure: true
   script:
     - OPTIONAL_TESTS=org.briarproject.bramble.plugin.tor.BridgeTest ./gradlew --info bramble-java:test --tests BridgeTest
-  timeout: 4h
 
-mailbox integration test:
+  after_script:
+    # these file change every time but should not be cached
+    - rm -f $GRADLE_USER_HOME/caches/modules-2/modules-2.lock
+    - rm -fr $GRADLE_USER_HOME/caches/*/plugin-resolution/
+
+manual_tests:
   extends: .optional_tests
-  rules:
+  when: manual
-    - changes:
+  except:
-        - mailbox-integration-tests/**/*
+    - tags
-      when: on_success
+
-      allow_failure: false
+pre_release_tests:
-    - if: '$CI_PIPELINE_SOURCE == "schedule"'
+  extends: .optional_tests
-      when: on_success
+  only:
-    - if: '$CI_COMMIT_TAG == null'
+    - tags
-      when: manual
-      allow_failure: true # TODO figure out how not to allow failure while leaving this optional
-  script:
-    - (cd briar-mailbox; git fetch; git reset --hard origin/main)
-    - MAILBOX_INTEGRATION_TESTS=true ./gradlew --info mailbox-integration-tests:test

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "briar-mailbox"]
-	path = briar-mailbox
-	url = https://code.briarproject.org/briar/briar-mailbox.git

.idea/codeStyles/Project.xml

@@ -31,10 +31,22 @@
       <option name="PACKAGES_TO_USE_STAR_IMPORTS">
         <value />
       </option>
+      <option name="PACKAGES_IMPORT_LAYOUT">
+        <value>
+          <package name="" alias="false" withSubpackages="true" />
+          <package name="java" alias="false" withSubpackages="true" />
+          <package name="javax" alias="false" withSubpackages="true" />
+          <package name="kotlin" alias="false" withSubpackages="true" />
+          <package name="" alias="true" withSubpackages="true" />
+        </value>
+      </option>
       <option name="NAME_COUNT_TO_USE_STAR_IMPORT" value="2147483647" />
       <option name="NAME_COUNT_TO_USE_STAR_IMPORT_FOR_MEMBERS" value="2147483647" />
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
     </JetCodeStyleSettings>
+    <XML>
+      <option name="XML_LEGACY_SETTINGS_IMPORTED" value="true" />
+    </XML>
     <codeStyleSettings language="Groovy">
       <indentOptions>
         <option name="USE_TAB_CHARACTER" value="true" />
@@ -185,9 +197,9 @@
     </codeStyleSettings>
     <codeStyleSettings language="kotlin">
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
-      <indentOptions>
+      <option name="PARAMETER_ANNOTATION_WRAP" value="1" />
-        <option name="CONTINUATION_INDENT_SIZE" value="4" />
+      <option name="VARIABLE_ANNOTATION_WRAP" value="1" />
-      </indentOptions>
+      <option name="ENUM_CONSTANTS_WRAP" value="1" />
     </codeStyleSettings>
   </code_scheme>
 </component>

.idea/inspectionProfiles/Project_Default.xml

@@ -1,14 +0,0 @@
-<component name="InspectionProjectProfileManager">
-  <profile version="1.0">
-    <option name="myName" value="Project Default" />
-    <inspection_tool class="MissingOverrideAnnotation" enabled="true" level="WARNING" enabled_by_default="true">
-      <option name="ignoreObjectMethods" value="true" />
-      <option name="ignoreAnonymousClassMethods" value="false" />
-    </inspection_tool>
-    <inspection_tool class="WeakerAccess" enabled="true" level="WARNING" enabled_by_default="true">
-      <option name="SUGGEST_PACKAGE_LOCAL_FOR_MEMBERS" value="true" />
-      <option name="SUGGEST_PACKAGE_LOCAL_FOR_TOP_CLASSES" value="true" />
-      <option name="SUGGEST_PRIVATE_FOR_INNERS" value="true" />
-    </inspection_tool>
-  </profile>
-</component>

.idea/runConfigurations/All_tests.xml

@@ -1,32 +1,21 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests" type="GradleRunConfiguration" factoryName="Gradle">
+  <configuration default="false" name="All tests" type="AndroidJUnit" factoryName="Android JUnit">
-    <ExternalSystemSettings>
+    <module name="briar.briar-android" />
-      <option name="executionName" />
+    <option name="PACKAGE_NAME" value="" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+    <option name="MAIN_CLASS_NAME" value="" />
-      <option name="externalSystemIdString" value="GRADLE" />
+    <option name="METHOD_NAME" value="" />
-      <option name="scriptParameters" value="" />
+    <option name="TEST_OBJECT" value="package" />
-      <option name="taskDescriptions">
+    <option name="PARAMETERS" value="" />
-        <list />
+    <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/briar-android" />
-      </option>
-      <option name="taskNames">
-        <list>
-          <option value=":briar-android:testOfficialDebugUnitTest" />
-          <option value=":briar-android:testScreenshotDebugUnitTest" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
     <method v="2">
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-api" run_configuration_type="GradleRunConfiguration" />
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in bramble-core" run_configuration_type="GradleRunConfiguration" />
+      <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-java" run_configuration_type="GradleRunConfiguration" />
+      <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="GradleRunConfiguration" />
+      <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 briar-api" run_configuration_type="GradleRunConfiguration" />
+      <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 briar-core" run_configuration_type="GradleRunConfiguration" />
+      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in briar-api" run_configuration_type="AndroidJUnit" />
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All tests in briar-headless" run_configuration_type="GradleRunConfiguration" />
+      <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 tests in briar-headless" run_configuration_type="AndroidJUnit" />
     </method>
   </configuration>
 </component>

.idea/runConfigurations/All_tests_in_bramble_android.xml

@@ -1,23 +1,14 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in bramble-android" type="GradleRunConfiguration" factoryName="Gradle">
+  <configuration default="false" name="All tests in bramble-android" type="AndroidJUnit" factoryName="Android JUnit">
-    <ExternalSystemSettings>
+    <module name="briar.bramble-android" />
-      <option name="executionName" />
+    <option name="PACKAGE_NAME" value="" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+    <option name="MAIN_CLASS_NAME" value="" />
-      <option name="externalSystemIdString" value="GRADLE" />
+    <option name="METHOD_NAME" value="" />
-      <option name="scriptParameters" value="" />
+    <option name="TEST_OBJECT" value="package" />
-      <option name="taskDescriptions">
+    <option name="PARAMETERS" value="" />
-        <list />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-android" />
-      </option>
+    <method v="2">
-      <option name="taskNames">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
-        <list>
+    </method>
-          <option value=":bramble-android:testDebugUnitTest" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
   </configuration>
 </component>

.idea/runConfigurations/All_tests_in_bramble_api.xml

@@ -1,25 +1,14 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in bramble-api" type="GradleRunConfiguration" factoryName="Gradle">
+  <configuration default="false" name="All tests in bramble-api" type="AndroidJUnit" factoryName="Android JUnit">
-    <ExternalSystemSettings>
+    <module name="briar.bramble-api" />
-      <option name="executionName" />
+    <option name="PACKAGE_NAME" value="" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+    <option name="MAIN_CLASS_NAME" value="" />
-      <option name="externalSystemIdString" value="GRADLE" />
+    <option name="METHOD_NAME" value="" />
-      <option name="scriptParameters" value="" />
+    <option name="TEST_OBJECT" value="package" />
-      <option name="taskDescriptions">
+    <option name="PARAMETERS" value="" />
-        <list />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-api" />
-      </option>
+    <method v="2">
-      <option name="taskNames">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
-        <list>
+    </method>
-          <option value=":bramble-api:animalSnifferMain" />
-          <option value=":bramble-api:animalSnifferTest" />
-          <option value=":bramble-api:test" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
   </configuration>
 </component>

.idea/runConfigurations/All_tests_in_bramble_core.xml

@@ -1,25 +1,14 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in bramble-core" type="GradleRunConfiguration" factoryName="Gradle">
+  <configuration default="false" name="All tests in bramble-core" type="AndroidJUnit" factoryName="Android JUnit">
-    <ExternalSystemSettings>
+    <module name="briar.bramble-core" />
-      <option name="executionName" />
+    <option name="PACKAGE_NAME" value="" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+    <option name="MAIN_CLASS_NAME" value="" />
-      <option name="externalSystemIdString" value="GRADLE" />
+    <option name="METHOD_NAME" value="" />
-      <option name="scriptParameters" value="" />
+    <option name="TEST_OBJECT" value="package" />
-      <option name="taskDescriptions">
+    <option name="PARAMETERS" value="" />
-        <list />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-core" />
-      </option>
+    <method v="2">
-      <option name="taskNames">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
-        <list>
+    </method>
-          <option value=":bramble-core:animalSnifferMain" />
-          <option value=":bramble-core:animalSnifferTest" />
-          <option value=":bramble-core:test" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
   </configuration>
 </component>

.idea/runConfigurations/All_tests_in_bramble_java.xml

@@ -1,23 +1,15 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in bramble-java" type="GradleRunConfiguration" factoryName="Gradle">
+  <configuration default="false" name="All tests in bramble-java" type="AndroidJUnit" factoryName="Android JUnit">
-    <ExternalSystemSettings>
+    <module name="briar.bramble-java" />
-      <option name="executionName" />
+    <option name="PACKAGE_NAME" value="" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+    <option name="MAIN_CLASS_NAME" value="" />
-      <option name="externalSystemIdString" value="GRADLE" />
+    <option name="METHOD_NAME" value="" />
-      <option name="scriptParameters" value="" />
+    <option name="TEST_OBJECT" value="package" />
-      <option name="taskDescriptions">
+    <option name="VM_PARAMETERS" value="-ea -Djava.library.path=libs" />
-        <list />
+    <option name="PARAMETERS" value="" />
-      </option>
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/bramble-java" />
-      <option name="taskNames">
+    <method v="2">
-        <list>
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
-          <option value=":bramble-java:test" />
+    </method>
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
   </configuration>
 </component>

.idea/runConfigurations/All_tests_in_briar_android.xml

@@ -1,24 +1,14 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in briar-android" type="GradleRunConfiguration" factoryName="Gradle">
+  <configuration default="false" name="All tests in briar-android" type="AndroidJUnit" factoryName="Android JUnit">
-    <ExternalSystemSettings>
+    <module name="briar.briar-android" />
-      <option name="executionName" />
+    <option name="PACKAGE_NAME" value="" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+    <option name="MAIN_CLASS_NAME" value="" />
-      <option name="externalSystemIdString" value="GRADLE" />
+    <option name="METHOD_NAME" value="" />
-      <option name="scriptParameters" value="" />
+    <option name="TEST_OBJECT" value="package" />
-      <option name="taskDescriptions">
+    <option name="PARAMETERS" value="" />
-        <list />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/briar-android" />
-      </option>
+    <method v="2">
-      <option name="taskNames">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
-        <list>
+    </method>
-          <option value=":briar-android:testOfficialDebugUnitTest" />
-          <option value=":briar-android:testScreenshotDebugUnitTest" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
   </configuration>
 </component>

.idea/runConfigurations/All_tests_in_briar_api.xml

@@ -1,25 +1,14 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in briar-api" type="GradleRunConfiguration" factoryName="Gradle">
+  <configuration default="false" name="All tests in briar-api" type="AndroidJUnit" factoryName="Android JUnit">
-    <ExternalSystemSettings>
+    <module name="briar.briar-api" />
-      <option name="executionName" />
+    <option name="PACKAGE_NAME" value="" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+    <option name="MAIN_CLASS_NAME" value="" />
-      <option name="externalSystemIdString" value="GRADLE" />
+    <option name="METHOD_NAME" value="" />
-      <option name="scriptParameters" value="" />
+    <option name="TEST_OBJECT" value="package" />
-      <option name="taskDescriptions">
+    <option name="PARAMETERS" value="" />
-        <list />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/briar-api" />
-      </option>
+    <method v="2">
-      <option name="taskNames">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
-        <list>
+    </method>
-          <option value=":briar-api:animalSnifferMain" />
-          <option value=":briar-api:animalSnifferTest" />
-          <option value=":briar-api:test" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
   </configuration>
 </component>

.idea/runConfigurations/All_tests_in_briar_core.xml

@@ -1,25 +1,14 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in briar-core" type="GradleRunConfiguration" factoryName="Gradle">
+  <configuration default="false" name="All tests in briar-core" type="AndroidJUnit" factoryName="Android JUnit">
-    <ExternalSystemSettings>
+    <module name="briar.briar-core" />
-      <option name="executionName" />
+    <option name="PACKAGE_NAME" value="" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+    <option name="MAIN_CLASS_NAME" value="" />
-      <option name="externalSystemIdString" value="GRADLE" />
+    <option name="METHOD_NAME" value="" />
-      <option name="scriptParameters" value="" />
+    <option name="TEST_OBJECT" value="package" />
-      <option name="taskDescriptions">
+    <option name="PARAMETERS" value="" />
-        <list />
+    <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$/briar-core" />
-      </option>
+    <method v="2">
-      <option name="taskNames">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
-        <list>
+    </method>
-          <option value=":briar-core:animalSnifferMain" />
-          <option value=":briar-core:animalSnifferTest" />
-          <option value=":briar-core:test" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
   </configuration>
 </component>

.idea/runConfigurations/All_tests_in_briar_headless.xml

@@ -1,23 +1,15 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in briar-headless" type="GradleRunConfiguration" factoryName="Gradle">
+  <configuration default="false" name="All tests in briar-headless" type="AndroidJUnit" factoryName="Android JUnit">
-    <ExternalSystemSettings>
+    <module name="briar.briar-headless" />
-      <option name="executionName" />
+    <option name="PACKAGE_NAME" value="org.briarproject.briar.headless" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+    <option name="MAIN_CLASS_NAME" value="" />
-      <option name="externalSystemIdString" value="GRADLE" />
+    <option name="METHOD_NAME" value="" />
-      <option name="scriptParameters" value="" />
+    <option name="TEST_OBJECT" value="package" />
-      <option name="taskDescriptions">
+    <option name="VM_PARAMETERS" />
-        <list />
+    <option name="PARAMETERS" value="" />
-      </option>
+    <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/briar-headless" />
-      <option name="taskNames">
+    <method v="2">
-        <list>
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
-          <option value=":briar-headless:test" />
+    </method>
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
   </configuration>
 </component>

.idea/runConfigurations/All_tests_in_mailbox_integration_tests.xml

@@ -1,29 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="All tests in mailbox-integration-tests" type="GradleRunConfiguration" factoryName="Gradle">
-    <ExternalSystemSettings>
-      <option name="env">
-        <map>
-          <entry key="MAILBOX_INTEGRATION_TESTS" value="true" />
-        </map>
-      </option>
-      <option name="executionName" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
-      <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="" />
-      <option name="taskDescriptions">
-        <list />
-      </option>
-      <option name="taskNames">
-        <list>
-          <option value=":mailbox-integration-tests:test" />
-          <option value=":mailbox-integration-tests:cleanTest" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
-  </configuration>
-</component>

.idea/runConfigurations/BridgeTest.xml

@@ -1,28 +1,24 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="BridgeTest" type="GradleRunConfiguration" factoryName="Gradle">
+  <configuration default="false" name="BridgeTest" type="AndroidJUnit" factoryName="Android JUnit" nameIsGenerated="true">
-    <ExternalSystemSettings>
+    <module name="briar.bramble-java" />
-      <option name="env">
+    <useClassPathOnly />
-        <map>
+    <extension name="coverage">
-          <entry key="OPTIONAL_TESTS" value="org.briarproject.bramble.plugin.tor.BridgeTest" />
+      <pattern>
-        </map>
+        <option name="PATTERN" value="org.briarproject.bramble.plugin.tor.*" />
-      </option>
+        <option name="ENABLED" value="true" />
-      <option name="executionName" />
+      </pattern>
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+    </extension>
-      <option name="externalSystemIdString" value="GRADLE" />
+    <option name="PACKAGE_NAME" value="org.briarproject.bramble.plugin.tor" />
-      <option name="scriptParameters" value="--tests &quot;org.briarproject.bramble.plugin.tor.BridgeTest&quot;" />
+    <option name="MAIN_CLASS_NAME" value="org.briarproject.bramble.plugin.tor.BridgeTest" />
-      <option name="taskDescriptions">
+    <option name="METHOD_NAME" value="" />
-        <list />
+    <option name="TEST_OBJECT" value="class" />
-      </option>
+    <option name="PARAMETERS" value="" />
-      <option name="taskNames">
+    <option name="WORKING_DIRECTORY" value="$MODULE_DIR$" />
-        <list>
+    <envs>
-          <option value=":bramble-java:test" />
+      <env name="OPTIONAL_TESTS" value="org.briarproject.bramble.plugin.tor.BridgeTest" />
-        </list>
+    </envs>
-      </option>
+    <method v="2">
-      <option name="vmOptions" value="" />
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
-    </ExternalSystemSettings>
+    </method>
-    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2" />
   </configuration>
 </component>

.idea/runConfigurations/H2_Performance_Test.xml

@@ -0,0 +1,14 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="H2 Performance Test" type="AndroidJUnit" factoryName="Android JUnit">
+    <module name="briar.bramble-core" />
+    <option name="PACKAGE_NAME" value="org.briarproject.bramble.db" />
+    <option name="MAIN_CLASS_NAME" value="org.briarproject.bramble.db.H2DatabasePerformanceTest" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="class" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="" />
+    <method v="2">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+    </method>
+  </configuration>
+</component>

.idea/runConfigurations/HyperSQL_Performance_Test.xml

@@ -0,0 +1,14 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="HyperSQL Performance Test" type="AndroidJUnit" factoryName="Android JUnit">
+    <module name="briar.bramble-core" />
+    <option name="PACKAGE_NAME" value="org.briarproject.bramble.db" />
+    <option name="MAIN_CLASS_NAME" value="org.briarproject.bramble.db.HyperSqlDatabasePerformanceTest" />
+    <option name="METHOD_NAME" value="" />
+    <option name="TEST_OBJECT" value="class" />
+    <option name="PARAMETERS" value="" />
+    <option name="WORKING_DIRECTORY" value="" />
+    <method v="2">
+      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
+    </method>
+  </configuration>
+</component>

.idea/runConfigurations/Instrumentation_Tests__destroys_DB_.xml

@@ -1,51 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Instrumentation Tests (destroys DB)" type="AndroidTestRunConfigurationType" factoryName="Android Instrumented Tests">
-    <module name="briar.briar-android" />
-    <option name="TESTING_TYPE" value="1" />
-    <option name="METHOD_NAME" value="" />
-    <option name="CLASS_NAME" value="" />
-    <option name="PACKAGE_NAME" value="org.briarproject.briar.android" />
-    <option name="INSTRUMENTATION_RUNNER_CLASS" value="" />
-    <option name="EXTRA_OPTIONS" value="-e notAnnotation androidx.test.filters.LargeTest" />
-    <option name="INCLUDE_GRADLE_EXTRA_OPTIONS" value="true" />
-    <option name="CLEAR_LOGCAT" value="false" />
-    <option name="SHOW_LOGCAT_AUTOMATICALLY" value="false" />
-    <option name="SKIP_NOOP_APK_INSTALLATIONS" value="true" />
-    <option name="FORCE_STOP_RUNNING_APP" value="true" />
-    <option name="TARGET_SELECTION_MODE" value="DEVICE_AND_SNAPSHOT_COMBO_BOX" />
-    <option name="DEBUGGER_TYPE" value="Auto" />
-    <Auto>
-      <option name="USE_JAVA_AWARE_DEBUGGER" value="false" />
-      <option name="SHOW_STATIC_VARS" value="true" />
-      <option name="WORKING_DIR" value="" />
-      <option name="TARGET_LOGGING_CHANNELS" value="lldb process:gdb-remote packets" />
-      <option name="SHOW_OPTIMIZED_WARNING" value="true" />
-    </Auto>
-    <Hybrid>
-      <option name="USE_JAVA_AWARE_DEBUGGER" value="false" />
-      <option name="SHOW_STATIC_VARS" value="true" />
-      <option name="WORKING_DIR" value="" />
-      <option name="TARGET_LOGGING_CHANNELS" value="lldb process:gdb-remote packets" />
-      <option name="SHOW_OPTIMIZED_WARNING" value="true" />
-    </Hybrid>
-    <Java />
-    <Native>
-      <option name="USE_JAVA_AWARE_DEBUGGER" value="false" />
-      <option name="SHOW_STATIC_VARS" value="true" />
-      <option name="WORKING_DIR" value="" />
-      <option name="TARGET_LOGGING_CHANNELS" value="lldb process:gdb-remote packets" />
-      <option name="SHOW_OPTIMIZED_WARNING" value="true" />
-    </Native>
-    <Profilers>
-      <option name="ADVANCED_PROFILING_ENABLED" value="false" />
-      <option name="STARTUP_PROFILING_ENABLED" value="false" />
-      <option name="STARTUP_CPU_PROFILING_ENABLED" value="false" />
-      <option name="STARTUP_CPU_PROFILING_CONFIGURATION_NAME" value="Sample Java Methods" />
-      <option name="STARTUP_NATIVE_MEMORY_PROFILING_ENABLED" value="false" />
-      <option name="NATIVE_MEMORY_SAMPLE_RATE_BYTES" value="2048" />
-    </Profilers>
-    <method v="2">
-      <option name="Android.Gradle.BeforeRunTask" enabled="true" />
-    </method>
-  </configuration>
-</component>

CONTRIBUTING.md

@@ -1,10 +0,0 @@
-Folder-Description:
-===================
-* `briar-*`: Specifically for the Briar app (Phone/Desktop/Headless)
-* `bramble-*`: The protocol stack - not necessarily Briar-dependent
-
----
-
-* `*-api`: public stuff that can be referenced from other packages and modules - mostly interfaces + a few utility classes
-* `*-core`: implementations of api that are portable across Android/Desktop/Headless
-* `*-java`: implementations of api that are specific to Desktop & Headless

README.md

@@ -1,37 +1 @@
-# Briar
+Briar is a messaging app designed for activists, journalists, and anyone else who needs a safe, easy and robust way to communicate. Unlike traditional messaging tools such as email, Twitter or Telegram, Briar doesn't rely on a central server - messages are synchronized directly between the users' devices. If the Internet's down, Briar can sync via Bluetooth or Wi-Fi, keeping the information flowing in a crisis. If the Internet's up, Briar can sync via the Tor network, protecting users and their relationships from surveillance.
-Briar is a messaging app designed for activists, journalists, and anyone else who needs a safe, easy and robust way to communicate.
-
-Unlike traditional messaging tools such as email, Twitter or Telegram, Briar doesn't rely on a central server - messages are synchronized directly between the users' devices. 
-
-If the Internet's down, Briar can sync via Bluetooth or Wi-Fi, keeping information flowing in a crisis. If the Internet's up, Briar can sync via the Tor network, protecting users and their relationships from surveillance.
-
-## Download Briar
-
-[<img src="https://briarproject.org//img/fdroid_badge.png"  width="240">](https://briarproject.org/fdroid)
-[<img src="https://briarproject.org/img/google_play_badge_web_generic.png"  width="240">](https://play.google.com/store/apps/details?id=org.briarproject.briar.android)
-
-You can also [download the APK file](https://briarproject.org/apk) directly from
-our site.
-
-## Useful links
-[briarproject.org](https://briarproject.org/)
-
-[Source code](https://code.briarproject.org/briar/briar/tree/master)
-
-[Manual](https://briarproject.org/manual/)
-
-[Wiki](https://code.briarproject.org/briar/briar/-/wikis/home)
-
-## Reproducible builds
-
-We provide [docker images](https://code.briarproject.org/briar/briar-reproducer#briar-reproducer)
-to ease the task of verifying that the published APK binaries
-include nothing but our publicly available source code.
-
-You can either use those images or use them as a blueprint to build your own environment
-for reproduction.
-
-## Donate
-
-[![Donate using Liberapay](https://briarproject.org/img/liberapay.svg)](https://liberapay.com/Briar/donate) [![Flattr this](https://briarproject.org/img/flattr-badge-large.png "Flattr this")](https://flattr.com/t/592836/)   
-Bitcoin and BCH: 1NZCKkUCtJV2U2Y9hDb9uq8S7ksFCFGR6K

bramble-android/build.gradle

@@ -1,24 +1,21 @@
+import com.android.build.gradle.tasks.MergeResources
+
 apply plugin: 'com.android.library'
 apply plugin: 'witness'
 apply from: 'witness.gradle'
 
 android {
-	compileSdkVersion 33
+	compileSdkVersion 30
-	buildToolsVersion '33.0.0'
+	buildToolsVersion '30.0.2'
-
-	packagingOptions {
-		doNotStrip '**/*.so'
-	}
 
 	defaultConfig {
 		minSdkVersion 16
-		targetSdkVersion 31
+		targetSdkVersion 29
-		versionCode 10423
+		versionCode 10216
-		versionName "1.4.23"
+		versionName "1.2.16"
 		consumerProguardFiles 'proguard-rules.txt'
 
 		testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
-		testInstrumentationRunnerArguments disableAnalytics: 'true'
 	}
 
 	compileOptions {
@@ -40,52 +37,75 @@ configurations {
 }
 
 dependencies {
-	// In theory this dependency shouldn't be needed, but without it Android Studio's linter will
+	implementation project(path: ':bramble-core', configuration: 'default')
-	// complain about unresolved symbols for bramble-api test classes in bramble-android tests,
+	tor 'org.briarproject:tor-android:0.3.5.13@zip'
-	// even though the bramble-api test classes are provided by the testImplementation dependency
+	tor 'org.briarproject:obfs4proxy-android:0.0.12-dev-40245c4a@zip'
-	// below and the compiler can find them
-	implementation project(':bramble-api')
 
-	implementation project(':bramble-core')
+	annotationProcessor 'com.google.dagger:dagger-compiler:2.24'
-
-	implementation 'androidx.annotation:annotation:1.5.0'
-
-	tor "org.briarproject:tor-android:$tor_version"
-	tor "org.briarproject:obfs4proxy-android:$obfs4proxy_version"
-	tor "org.briarproject:snowflake-android:$snowflake_version"
-
-	annotationProcessor "com.google.dagger:dagger-compiler:$dagger_version"
 
 	compileOnly 'javax.annotation:jsr250-api:1.0'
 
 	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
-
+	testImplementation 'junit:junit:4.12'
-	testImplementation "junit:junit:$junit_version"
+	testImplementation "org.jmock:jmock:2.8.2"
-	testImplementation "org.jmock:jmock:$jmock_version"
+	testImplementation "org.jmock:jmock-junit4:2.8.2"
-	testImplementation "org.jmock:jmock-junit4:$jmock_version"
+	testImplementation "org.jmock:jmock-legacy:2.8.2"
-	testImplementation "org.jmock:jmock-imposters:$jmock_version"
 }
 
+def torBinariesDir = 'src/main/res/raw'
 def torLibsDir = 'src/main/jniLibs'
 
 task cleanTorBinaries {
-	outputs.dir torLibsDir
 	doLast {
-		delete fileTree(torLibsDir)
+		delete fileTree(torBinariesDir) { include '*.zip' }
+		delete fileTree(torLibsDir) { include '**/*.so' }
 	}
 }
 
 clean.dependsOn cleanTorBinaries
 
 task unpackTorBinaries {
-	outputs.dir torLibsDir
 	doLast {
 		copy {
 			from configurations.tor.collect { zipTree(it) }
-			into torLibsDir
+			into torBinariesDir
+			include 'geoip.zip'
+		}
+		configurations.tor.each { outer ->
+			zipTree(outer).each { inner ->
+				if (inner.name.endsWith('_arm_pie.zip')) {
+					copy {
+						from zipTree(inner)
+						into torLibsDir
+						rename '(.*)', 'armeabi-v7a/lib$1.so'
+					}
+				} else if (inner.name.endsWith('_arm64_pie.zip')) {
+					copy {
+						from zipTree(inner)
+						into torLibsDir
+						rename '(.*)', 'arm64-v8a/lib$1.so'
+					}
+				} else if (inner.name.endsWith('_x86_pie.zip')) {
+					copy {
+						from zipTree(inner)
+						into torLibsDir
+						rename '(.*)', 'x86/lib$1.so'
+					}
+				} else if (inner.name.endsWith('_x86_64_pie.zip')) {
+					copy {
+						from zipTree(inner)
+						into torLibsDir
+						rename '(.*)', 'x86_64/lib$1.so'
+					}
+				}
+			}
 		}
 	}
 	dependsOn cleanTorBinaries
 }
 
-preBuild.dependsOn unpackTorBinaries
+tasks.withType(MergeResources) {
+	inputs.dir torBinariesDir
+	inputs.dir torLibsDir
+	dependsOn unpackTorBinaries
+}

bramble-android/proguard-rules.txt

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

bramble-android/src/main/AndroidManifest.xml

@@ -1,28 +1,15 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+<manifest
-	xmlns:tools="http://schemas.android.com/tools"
+	package="org.briarproject.bramble"
-	package="org.briarproject.bramble">
+	xmlns:android="http://schemas.android.com/apk/res/android">
 
-	<uses-feature
+	<uses-feature android:name="android.hardware.bluetooth" android:required="false"/>
-		android:name="android.hardware.bluetooth"
-		android:required="false" />
 
-	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
-	<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+	<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
-	<!-- The BLUETOOTH permission was supposed to be removed in API 31 but is still needed on some Xiaomi/Redmi/POCO devices running API 31 -->
+	<uses-permission android:name="android.permission.BLUETOOTH"/>
-	<uses-permission
+	<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
-		android:name="android.permission.BLUETOOTH"
+	<uses-permission android:name="android.permission.INTERNET"/>
-		android:maxSdkVersion="31" />
+	<uses-permission android:name="android.permission.WAKE_LOCK"/>
-	<uses-permission
-		android:name="android.permission.BLUETOOTH_ADMIN"
-		android:maxSdkVersion="30" />
-	<uses-permission
-		android:name="android.permission.BLUETOOTH_SCAN"
-		android:usesPermissionFlags="neverForLocation"
-		tools:targetApi="31" />
-	<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
-	<uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
-	<uses-permission android:name="android.permission.INTERNET" />
-	<uses-permission android:name="android.permission.WAKE_LOCK" />
 
 	<application
 		android:allowBackup="false"

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

@@ -1,7 +1,6 @@
 package org.briarproject.bramble;
 
 import org.briarproject.bramble.battery.AndroidBatteryModule;
-import org.briarproject.bramble.io.DnsModule;
 import org.briarproject.bramble.network.AndroidNetworkModule;
 import org.briarproject.bramble.plugin.tor.CircumventionModule;
 import org.briarproject.bramble.reporting.ReportingModule;
@@ -9,7 +8,6 @@ import org.briarproject.bramble.socks.SocksModule;
 import org.briarproject.bramble.system.AndroidSystemModule;
 import org.briarproject.bramble.system.AndroidTaskSchedulerModule;
 import org.briarproject.bramble.system.AndroidWakefulIoExecutorModule;
-import org.briarproject.bramble.system.DefaultThreadFactoryModule;
 
 import dagger.Module;
 
@@ -19,9 +17,7 @@ import dagger.Module;
 		AndroidSystemModule.class,
 		AndroidTaskSchedulerModule.class,
 		AndroidWakefulIoExecutorModule.class,
-		DefaultThreadFactoryModule.class,
 		CircumventionModule.class,
-		DnsModule.class,
 		ReportingModule.class,
 		SocksModule.class
 })

bramble-android/src/main/java/org/briarproject/bramble/api/system/AlarmListener.java

@@ -2,7 +2,7 @@ package org.briarproject.bramble.api.system;
 
 import android.content.Intent;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 @NotNullByDefault
 public interface AlarmListener {

bramble-android/src/main/java/org/briarproject/bramble/api/system/AndroidWakeLock.java

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.system;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 @NotNullByDefault
 public interface AndroidWakeLock {

bramble-android/src/main/java/org/briarproject/bramble/api/system/AndroidWakeLockManager.java

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.system;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import java.util.concurrent.Executor;
 

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

@@ -11,19 +11,17 @@ import android.net.LinkAddress;
 import android.net.LinkProperties;
 import android.net.Network;
 import android.net.NetworkInfo;
-import android.net.wifi.WifiInfo;
-import android.net.wifi.WifiManager;
 
-import org.briarproject.bramble.api.Cancellable;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.event.EventExecutor;
 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.TaskScheduler;
-import org.briarproject.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.system.TaskScheduler.Cancellable;
-import org.briarproject.nullsafety.ParametersNotNullByDefault;
 
 import java.net.Inet4Address;
 import java.net.InetAddress;
@@ -40,7 +38,6 @@ import javax.annotation.Nullable;
 import javax.inject.Inject;
 
 import static android.content.Context.CONNECTIVITY_SERVICE;
-import static android.content.Context.WIFI_SERVICE;
 import static android.content.Intent.ACTION_SCREEN_OFF;
 import static android.content.Intent.ACTION_SCREEN_ON;
 import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
@@ -55,8 +52,8 @@ import static java.util.concurrent.TimeUnit.SECONDS;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.api.nullsafety.NullSafety.requireNonNull;
 import static org.briarproject.bramble.util.LogUtils.logException;
-import static org.briarproject.nullsafety.NullSafety.requireNonNull;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -114,42 +111,15 @@ class AndroidNetworkManager implements NetworkManager, Service {
 
 	@Override
 	public NetworkStatus getNetworkStatus() {
-		// https://issuetracker.google.com/issues/175055271
+		NetworkInfo net = connectivityManager.getActiveNetworkInfo();
-		try {
+		boolean connected = net != null && net.isConnected();
-			NetworkInfo net = connectivityManager.getActiveNetworkInfo();
+		boolean wifi = false, ipv6Only = false;
-			boolean connected = net != null && net.isConnected();
+		if (connected) {
-			// Research into Android's behavior to check network connectivity
+			wifi = net.getType() == TYPE_WIFI;
-			// (https://code.briarproject.org/briar/public-mesh-research/-/issues/19)
+			if (SDK_INT >= 23) ipv6Only = isActiveNetworkIpv6Only();
-			// has shown that NetworkInfo#isConnected() returns true if the device
+			else ipv6Only = areAllAvailableNetworksIpv6Only();
-			// is connected to any Wifi, independent of whether any specific IP
-			// address can be reached using it or any domain names can be resolved.
-			boolean wifi = false, ipv6Only = false;
-			if (connected) {
-				wifi = net.getType() == TYPE_WIFI;
-				if (SDK_INT >= 23) ipv6Only = isActiveNetworkIpv6Only();
-				else ipv6Only = areAllAvailableNetworksIpv6Only();
-			}
-			return new NetworkStatus(connected, wifi, ipv6Only);
-		} catch (SecurityException e) {
-			logException(LOG, WARNING, e);
-			// Without the ConnectivityManager we can't detect whether we have
-			// internet access. Assume we do, which is probably less harmful
-			// than assuming we don't. Likewise, assume the connection is
-			// IPv6-only. Fall back to the WifiManager to detect whether we
-			// have a wifi connection.
-			LOG.info("ConnectivityManager is broken, guessing connectivity");
-			boolean connected = true, wifi = false, ipv6Only = true;
-			WifiManager wm = (WifiManager) app.getSystemService(WIFI_SERVICE);
-			if (wm != null) {
-				WifiInfo info = wm.getConnectionInfo();
-				if (info != null && info.getIpAddress() != 0) {
-					LOG.info("Connected to wifi");
-					wifi = true;
-					ipv6Only = false;
-				}
-			}
-			return new NetworkStatus(connected, wifi, ipv6Only);
 		}
+		return new NetworkStatus(connected, wifi, ipv6Only);
 	}
 
 	/**
@@ -160,29 +130,23 @@ class AndroidNetworkManager implements NetworkManager, Service {
 	 */
 	@TargetApi(23)
 	private boolean isActiveNetworkIpv6Only() {
-		// https://issuetracker.google.com/issues/175055271
+		Network net = connectivityManager.getActiveNetwork();
-		try {
+		if (net == null) {
-			Network net = connectivityManager.getActiveNetwork();
+			LOG.info("No active network");
-			if (net == null) {
-				LOG.info("No active network");
-				return false;
-			}
-			LinkProperties props = connectivityManager.getLinkProperties(net);
-			if (props == null) {
-				LOG.info("No link properties for active network");
-				return false;
-			}
-			boolean hasIpv6Unicast = false;
-			for (LinkAddress linkAddress : props.getLinkAddresses()) {
-				InetAddress addr = linkAddress.getAddress();
-				if (addr instanceof Inet4Address) return false;
-				if (!addr.isMulticastAddress()) hasIpv6Unicast = true;
-			}
-			return hasIpv6Unicast;
-		} catch (SecurityException e) {
-			logException(LOG, WARNING, e);
 			return false;
 		}
+		LinkProperties props = connectivityManager.getLinkProperties(net);
+		if (props == null) {
+			LOG.info("No link properties for active network");
+			return false;
+		}
+		boolean hasIpv6Unicast = false;
+		for (LinkAddress linkAddress : props.getLinkAddresses()) {
+			InetAddress addr = linkAddress.getAddress();
+			if (addr instanceof Inet4Address) return false;
+			if (!addr.isMulticastAddress()) hasIpv6Unicast = true;
+		}
+		return hasIpv6Unicast;
 	}
 
 	/**

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

@@ -3,10 +3,10 @@ package org.briarproject.bramble.plugin.bluetooth;
 import android.bluetooth.BluetoothSocket;
 
 import org.briarproject.bramble.api.io.TimeoutMonitor;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
 import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
 import org.briarproject.bramble.api.system.AndroidWakeLockManager;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.io.IOException;
 

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

@@ -10,6 +10,8 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 
+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.PluginCallback;
 import org.briarproject.bramble.api.plugin.PluginException;
@@ -18,8 +20,6 @@ import org.briarproject.bramble.api.system.AndroidExecutor;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.util.AndroidUtils;
 import org.briarproject.bramble.util.IoUtils;
-import org.briarproject.nullsafety.MethodsNotNullByDefault;
-import org.briarproject.nullsafety.ParametersNotNullByDefault;
 
 import java.io.IOException;
 import java.security.SecureRandom;
@@ -55,13 +55,12 @@ import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static java.util.logging.Logger.getLogger;
-import static org.briarproject.bramble.util.AndroidUtils.hasBtConnectPermission;
 import static org.briarproject.bramble.util.PrivacyUtils.scrubMacAddress;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
-class AndroidBluetoothPlugin extends
+class AndroidBluetoothPlugin
-		AbstractBluetoothPlugin<BluetoothSocket, BluetoothServerSocket> {
+		extends BluetoothPlugin<BluetoothSocket, BluetoothServerSocket> {
 
 	private static final Logger LOG =
 			getLogger(AndroidBluetoothPlugin.class.getName());
@@ -76,7 +75,6 @@ class AndroidBluetoothPlugin extends
 
 	// Non-null if the plugin started successfully
 	private volatile BluetoothAdapter adapter = null;
-	private volatile boolean stopDiscoverAndConnect;
 
 	AndroidBluetoothPlugin(BluetoothConnectionLimiter connectionLimiter,
 			BluetoothConnectionFactory<BluetoothSocket> connectionFactory,
@@ -88,7 +86,7 @@ class AndroidBluetoothPlugin extends
 			Clock clock,
 			Backoff backoff,
 			PluginCallback callback,
-			long maxLatency,
+			int maxLatency,
 			int maxIdleTime) {
 		super(connectionLimiter, connectionFactory, ioExecutor,
 				wakefulIoExecutor, secureRandom, backoff, callback,
@@ -98,11 +96,6 @@ class AndroidBluetoothPlugin extends
 		this.clock = clock;
 	}
 
-	@Override
-	protected boolean isBluetoothAccessible() {
-		return hasBtConnectPermission(app);
-	}
-
 	@Override
 	public void start() throws PluginException {
 		super.start();
@@ -182,11 +175,6 @@ class AndroidBluetoothPlugin extends
 		} catch (IOException e) {
 			IoUtils.tryToClose(s, LOG, WARNING);
 			throw e;
-		} catch (NullPointerException e) {
-			// BluetoothSocket#connect() may throw an NPE under unknown
-			// circumstances
-			IoUtils.tryToClose(s, LOG, WARNING);
-			throw new IOException(e);
 		}
 	}
 
@@ -194,40 +182,22 @@ class AndroidBluetoothPlugin extends
 	@Nullable
 	DuplexTransportConnection discoverAndConnect(String uuid) {
 		if (adapter == null) return null;
-		if (!discoverSemaphore.tryAcquire()) {
+		for (String address : discoverDevices()) {
-			LOG.info("Discover already running");
+			try {
-			return null;
+				if (LOG.isLoggable(INFO))
-		}
+					LOG.info("Connecting to " + scrubMacAddress(address));
-		try {
+				return connectTo(address, uuid);
-			stopDiscoverAndConnect = false;
+			} catch (IOException e) {
-			for (String address : discoverDevices()) {
+				if (LOG.isLoggable(INFO)) {
-				if (stopDiscoverAndConnect) {
+					LOG.info("Could not connect to "
-					break;
+							+ scrubMacAddress(address));
-				}
-				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));
-					}
 				}
 			}
-		} finally {
-			discoverSemaphore.release();
 		}
 		LOG.info("Could not connect to any devices");
 		return null;
 	}
 
-	@Override
-	public void stopDiscoverAndConnect() {
-		stopDiscoverAndConnect = true;
-		adapter.cancelDiscovery();
-	}
-
 	private Collection<String> discoverDevices() {
 		List<String> addresses = new ArrayList<>();
 		BlockingQueue<Intent> intents = new LinkedBlockingQueue<>();

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

@@ -6,6 +6,7 @@ import android.bluetooth.BluetoothSocket;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.io.TimeoutMonitor;
 import org.briarproject.bramble.api.lifecycle.IoExecutor;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.Backoff;
 import org.briarproject.bramble.api.plugin.BackoffFactory;
 import org.briarproject.bramble.api.plugin.PluginCallback;
@@ -16,7 +17,6 @@ import org.briarproject.bramble.api.system.AndroidExecutor;
 import org.briarproject.bramble.api.system.AndroidWakeLockManager;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.WakefulIoExecutor;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.security.SecureRandom;
 import java.util.concurrent.Executor;
@@ -47,7 +47,7 @@ public class AndroidBluetoothPluginFactory implements DuplexPluginFactory {
 	private final BackoffFactory backoffFactory;
 
 	@Inject
-	AndroidBluetoothPluginFactory(@IoExecutor Executor ioExecutor,
+	public AndroidBluetoothPluginFactory(@IoExecutor Executor ioExecutor,
 			@WakefulIoExecutor Executor wakefulIoExecutor,
 			AndroidExecutor androidExecutor,
 			AndroidWakeLockManager wakeLockManager,
@@ -75,7 +75,7 @@ public class AndroidBluetoothPluginFactory implements DuplexPluginFactory {
 	}
 
 	@Override
-	public long getMaxLatency() {
+	public int getMaxLatency() {
 		return MAX_LATENCY;
 	}
 

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

@@ -3,11 +3,11 @@ package org.briarproject.bramble.plugin.bluetooth;
 import android.bluetooth.BluetoothSocket;
 
 import org.briarproject.bramble.api.io.TimeoutMonitor;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.Plugin;
 import org.briarproject.bramble.api.plugin.duplex.AbstractDuplexTransportConnection;
 import org.briarproject.bramble.api.system.AndroidWakeLock;
 import org.briarproject.bramble.api.system.AndroidWakeLockManager;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -33,10 +33,8 @@ class AndroidBluetoothTransportConnection
 		super(plugin);
 		this.connectionLimiter = connectionLimiter;
 		this.socket = socket;
-		InputStream socketIn = socket.getInputStream();
+		in = timeoutMonitor.createTimeoutInputStream(
-		if (socketIn == null) throw new IOException();
+				socket.getInputStream(), plugin.getMaxIdleTime() * 2);
-		in = timeoutMonitor.createTimeoutInputStream(socketIn,
-				plugin.getMaxIdleTime() * 2L);
 		wakeLock = wakeLockManager.createWakeLock("BluetoothConnection");
 		wakeLock.acquire();
 		String address = socket.getRemoteDevice().getAddress();
@@ -50,9 +48,7 @@ class AndroidBluetoothTransportConnection
 
 	@Override
 	protected OutputStream getOutputStream() throws IOException {
-		OutputStream socketOut = socket.getOutputStream();
+		return socket.getOutputStream();
-		if (socketOut == null) throw new IOException();
-		return socketOut;
 	}
 
 	@Override

bramble-android/src/main/java/org/briarproject/bramble/plugin/file/AndroidRemovableDrivePlugin.java

@@ -1,53 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import android.app.Application;
-import android.net.Uri;
-
-import org.briarproject.bramble.api.plugin.PluginCallback;
-import org.briarproject.bramble.api.properties.TransportProperties;
-import org.briarproject.nullsafety.NotNullByDefault;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-
-import javax.annotation.concurrent.Immutable;
-
-import static org.briarproject.bramble.api.plugin.file.RemovableDriveConstants.PROP_URI;
-import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
-
-@Immutable
-@NotNullByDefault
-class AndroidRemovableDrivePlugin extends RemovableDrivePlugin {
-
-	private final Application app;
-
-	AndroidRemovableDrivePlugin(Application app, PluginCallback callback,
-			long maxLatency) {
-		super(callback, maxLatency);
-		this.app = app;
-	}
-
-	@Override
-	InputStream openInputStream(TransportProperties p) throws IOException {
-		String uri = p.get(PROP_URI);
-		if (isNullOrEmpty(uri)) throw new IllegalArgumentException();
-		try {
-			return app.getContentResolver().openInputStream(Uri.parse(uri));
-		} catch (SecurityException e) {
-			throw new IOException(e);
-		}
-	}
-
-	@Override
-	OutputStream openOutputStream(TransportProperties p) throws IOException {
-		String uri = p.get(PROP_URI);
-		if (isNullOrEmpty(uri)) throw new IllegalArgumentException();
-		try {
-			return app.getContentResolver()
-					.openOutputStream(Uri.parse(uri), "wt");
-		} catch (SecurityException e) {
-			throw new IOException(e);
-		}
-	}
-}

bramble-android/src/main/java/org/briarproject/bramble/plugin/file/AndroidRemovableDrivePluginFactory.java

@@ -1,47 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import android.app.Application;
-
-import org.briarproject.bramble.api.plugin.PluginCallback;
-import org.briarproject.bramble.api.plugin.TransportId;
-import org.briarproject.bramble.api.plugin.simplex.SimplexPlugin;
-import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
-import org.briarproject.nullsafety.NotNullByDefault;
-
-import javax.annotation.Nullable;
-import javax.annotation.concurrent.Immutable;
-import javax.inject.Inject;
-
-import static java.util.concurrent.TimeUnit.DAYS;
-import static org.briarproject.bramble.api.plugin.file.RemovableDriveConstants.ID;
-
-@Immutable
-@NotNullByDefault
-public class AndroidRemovableDrivePluginFactory implements
-		SimplexPluginFactory {
-
-	private static final long MAX_LATENCY = DAYS.toMillis(28);
-
-	private final Application app;
-
-	@Inject
-	AndroidRemovableDrivePluginFactory(Application app) {
-		this.app = app;
-	}
-
-	@Override
-	public TransportId getId() {
-		return ID;
-	}
-
-	@Override
-	public long getMaxLatency() {
-		return MAX_LATENCY;
-	}
-
-	@Nullable
-	@Override
-	public SimplexPlugin createPlugin(PluginCallback callback) {
-		return new AndroidRemovableDrivePlugin(app, callback, MAX_LATENCY);
-	}
-}

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

@@ -14,10 +14,10 @@ import org.briarproject.bramble.PoliteExecutor;
 import org.briarproject.bramble.api.Pair;
 import org.briarproject.bramble.api.event.Event;
 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.PluginCallback;
 import org.briarproject.bramble.api.settings.Settings;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.io.IOException;
 import java.net.InetAddress;
@@ -29,7 +29,6 @@ import java.net.UnknownHostException;
 import java.util.List;
 import java.util.concurrent.Executor;
 import java.util.logging.Logger;
-import java.util.regex.Pattern;
 
 import javax.annotation.Nullable;
 import javax.net.SocketFactory;
@@ -43,13 +42,12 @@ import static java.util.Collections.list;
 import static java.util.Collections.singletonList;
 import static java.util.logging.Level.WARNING;
 import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.api.nullsafety.NullSafety.requireNonNull;
 import static org.briarproject.bramble.api.plugin.LanTcpConstants.DEFAULT_PREF_PLUGIN_ENABLE;
 import static org.briarproject.bramble.api.plugin.Plugin.State.ACTIVE;
 import static org.briarproject.bramble.api.plugin.Plugin.State.INACTIVE;
 import static org.briarproject.bramble.util.IoUtils.tryToClose;
 import static org.briarproject.bramble.util.LogUtils.logException;
-import static org.briarproject.bramble.util.NetworkUtils.getNetworkInterfaces;
-import static org.briarproject.nullsafety.NullSafety.requireNonNull;
 
 @NotNullByDefault
 class AndroidLanTcpPlugin extends LanTcpPlugin {
@@ -57,13 +55,6 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 	private static final Logger LOG =
 			getLogger(AndroidLanTcpPlugin.class.getName());
 
-	/**
-	 * The interface name is used as a heuristic for deciding whether the
-	 * device is providing a wifi access point.
-	 */
-	private static final Pattern AP_INTERFACE_NAME =
-			Pattern.compile("^(wlan|ap|p2p)[-0-9]");
-
 	private final Executor connectionStatusExecutor;
 	private final ConnectivityManager connectivityManager;
 	@Nullable
@@ -76,7 +67,7 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 			Application app,
 			Backoff backoff,
 			PluginCallback callback,
-			long maxLatency,
+			int maxLatency,
 			int maxIdleTime,
 			int connectionTimeout) {
 		super(ioExecutor, wakefulIoExecutor, backoff, callback, maxLatency,
@@ -139,14 +130,17 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 		if (info != null && info.getIpAddress() != 0) {
 			return new Pair<>(intToInetAddress(info.getIpAddress()), false);
 		}
-		// If we're providing an access point, return its address
+		List<InterfaceAddress> ifAddrs = getLocalInterfaceAddresses();
-		for (NetworkInterface iface : getNetworkInterfaces()) {
+		// If we're providing a normal access point, return its address
-			if (AP_INTERFACE_NAME.matcher(iface.getName()).find()) {
+		for (InterfaceAddress ifAddr : ifAddrs) {
-				for (InterfaceAddress ifAddr : iface.getInterfaceAddresses()) {
+			if (isAndroidWifiApAddress(ifAddr)) {
-					if (isPossibleWifiApInterface(ifAddr)) {
+				return new Pair<>(ifAddr.getAddress(), true);
-						return new Pair<>(ifAddr.getAddress(), true);
+			}
-					}
+		}
-				}
+		// If we're providing a wifi direct access point, return its address
+		for (InterfaceAddress ifAddr : ifAddrs) {
+			if (isAndroidWifiDirectApAddress(ifAddr)) {
+				return new Pair<>(ifAddr.getAddress(), true);
 			}
 		}
 		// Not connected to wifi
@@ -154,18 +148,33 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 	}
 
 	/**
-	 * Returns true if the given address may belong to an interface providing
+	 * Returns true if the given address belongs to a network provided by an
-	 * a wifi access point (including wifi direct legacy mode access points).
+	 * Android access point (including the access point's own address).
 	 * <p>
-	 * This method may return true for wifi client interfaces as well, but
+	 * The access point's address is usually 192.168.43.1, but at least one
-	 * we've already checked for a wifi client connection above.
+	 * device (Honor 8A) may use other addresses in the range 192.168.43.0/24.
 	 */
-	private boolean isPossibleWifiApInterface(InterfaceAddress ifAddr) {
+	private boolean isAndroidWifiApAddress(InterfaceAddress ifAddr) {
 		if (ifAddr.getNetworkPrefixLength() != 24) return false;
 		byte[] ip = ifAddr.getAddress().getAddress();
 		return ip.length == 4
 				&& ip[0] == (byte) 192
-				&& ip[1] == (byte) 168;
+				&& ip[1] == (byte) 168
+				&& ip[2] == (byte) 43;
+	}
+
+	/**
+	 * Returns true if the given address belongs to a network provided by an
+	 * Android wifi direct legacy mode access point (including the access
+	 * point's own address).
+	 */
+	private boolean isAndroidWifiDirectApAddress(InterfaceAddress ifAddr) {
+		if (ifAddr.getNetworkPrefixLength() != 24) return false;
+		byte[] ip = ifAddr.getAddress().getAddress();
+		return ip.length == 4
+				&& ip[0] == (byte) 192
+				&& ip[1] == (byte) 168
+				&& ip[2] == (byte) 49;
 	}
 
 	/**
@@ -175,24 +184,16 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 	@TargetApi(21)
 	@Nullable
 	private InetAddress getWifiClientIpv6Address() {
-		// https://issuetracker.google.com/issues/175055271
+		for (Network net : connectivityManager.getAllNetworks()) {
-		try {
+			NetworkCapabilities caps =
-			for (Network net : connectivityManager.getAllNetworks()) {
+					connectivityManager.getNetworkCapabilities(net);
-				NetworkCapabilities caps =
+			if (caps == null || !caps.hasTransport(TRANSPORT_WIFI)) continue;
-						connectivityManager.getNetworkCapabilities(net);
+			LinkProperties props = connectivityManager.getLinkProperties(net);
-				if (caps == null || !caps.hasTransport(TRANSPORT_WIFI)) {
+			if (props == null) continue;
-					continue;
+			for (LinkAddress linkAddress : props.getLinkAddresses()) {
-				}
+				InetAddress addr = linkAddress.getAddress();
-				LinkProperties props =
+				if (isIpv6LinkLocalAddress(addr)) return addr;
-						connectivityManager.getLinkProperties(net);
-				if (props == null) continue;
-				for (LinkAddress linkAddress : props.getLinkAddresses()) {
-					InetAddress addr = linkAddress.getAddress();
-					if (isIpv6LinkLocalAddress(addr)) return addr;
-				}
 			}
-		} catch (SecurityException e) {
-			logException(LOG, WARNING, e);
 		}
 		return null;
 	}
@@ -235,17 +236,12 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 	// network's socket factory may try to connect via another network
 	private SocketFactory getSocketFactory() {
 		if (SDK_INT < 21) return SocketFactory.getDefault();
-		// https://issuetracker.google.com/issues/175055271
+		for (Network net : connectivityManager.getAllNetworks()) {
-		try {
+			NetworkCapabilities caps =
-			for (Network net : connectivityManager.getAllNetworks()) {
+					connectivityManager.getNetworkCapabilities(net);
-				NetworkCapabilities caps =
+			if (caps != null && caps.hasTransport(TRANSPORT_WIFI)) {
-						connectivityManager.getNetworkCapabilities(net);
+				return net.getSocketFactory();
-				if (caps != null && caps.hasTransport(TRANSPORT_WIFI)) {
-					return net.getSocketFactory();
-				}
 			}
-		} catch (SecurityException e) {
-			logException(LOG, WARNING, e);
 		}
 		LOG.warning("Could not find suitable socket factory");
 		return SocketFactory.getDefault();

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

@@ -4,6 +4,7 @@ import android.app.Application;
 
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.lifecycle.IoExecutor;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.Backoff;
 import org.briarproject.bramble.api.plugin.BackoffFactory;
 import org.briarproject.bramble.api.plugin.PluginCallback;
@@ -11,7 +12,6 @@ import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
 import org.briarproject.bramble.api.system.WakefulIoExecutor;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.util.concurrent.Executor;
 
@@ -37,7 +37,7 @@ public class AndroidLanTcpPluginFactory implements DuplexPluginFactory {
 	private final Application app;
 
 	@Inject
-	AndroidLanTcpPluginFactory(@IoExecutor Executor ioExecutor,
+	public AndroidLanTcpPluginFactory(@IoExecutor Executor ioExecutor,
 			@WakefulIoExecutor Executor wakefulIoExecutor,
 			EventBus eventBus,
 			BackoffFactory backoffFactory,
@@ -55,7 +55,7 @@ public class AndroidLanTcpPluginFactory implements DuplexPluginFactory {
 	}
 
 	@Override
-	public long getMaxLatency() {
+	public int getMaxLatency() {
 		return MAX_LATENCY;
 	}
 

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

@@ -7,6 +7,8 @@ import android.content.pm.PackageManager.NameNotFoundException;
 
 import org.briarproject.bramble.api.battery.BatteryManager;
 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.PluginCallback;
 import org.briarproject.bramble.api.system.AndroidWakeLock;
@@ -15,8 +17,6 @@ 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 org.briarproject.nullsafety.MethodsNotNullByDefault;
-import org.briarproject.nullsafety.ParametersNotNullByDefault;
 
 import java.io.File;
 import java.io.FileInputStream;
@@ -31,8 +31,6 @@ import java.util.zip.ZipInputStream;
 
 import javax.net.SocketFactory;
 
-import androidx.annotation.ChecksSdkIntAtLeast;
-
 import static android.os.Build.VERSION.SDK_INT;
 import static java.util.Arrays.asList;
 import static java.util.logging.Level.INFO;
@@ -47,14 +45,13 @@ class AndroidTorPlugin extends TorPlugin {
 
 	private static final String TOR_LIB_NAME = "libtor.so";
 	private static final String OBFS4_LIB_NAME = "libobfs4proxy.so";
-	private static final String SNOWFLAKE_LIB_NAME = "libsnowflake.so";
 
 	private static final Logger LOG =
 			getLogger(AndroidTorPlugin.class.getName());
 
 	private final Application app;
 	private final AndroidWakeLock wakeLock;
-	private final File torLib, obfs4Lib, snowflakeLib;
+	private final File torLib, obfs4Lib;
 
 	AndroidTorPlugin(Executor ioExecutor,
 			Executor wakefulIoExecutor,
@@ -71,22 +68,19 @@ class AndroidTorPlugin extends TorPlugin {
 			TorRendezvousCrypto torRendezvousCrypto,
 			PluginCallback callback,
 			String architecture,
-			long maxLatency,
+			int maxLatency,
 			int maxIdleTime,
-			File torDirectory,
+			File torDirectory) {
-			int torSocksPort,
-			int torControlPort) {
 		super(ioExecutor, wakefulIoExecutor, networkManager, locationUtils,
 				torSocketFactory, clock, resourceProvider,
 				circumventionProvider, batteryManager, backoff,
 				torRendezvousCrypto, callback, architecture, maxLatency,
-				maxIdleTime, torDirectory, torSocksPort, torControlPort);
+				maxIdleTime, torDirectory);
 		this.app = app;
 		wakeLock = wakeLockManager.createWakeLock("TorPlugin");
 		String nativeLibDir = app.getApplicationInfo().nativeLibraryDir;
 		torLib = new File(nativeLibDir, TOR_LIB_NAME);
 		obfs4Lib = new File(nativeLibDir, OBFS4_LIB_NAME);
-		snowflakeLib = new File(nativeLibDir, SNOWFLAKE_LIB_NAME);
 	}
 
 	@Override
@@ -112,12 +106,6 @@ class AndroidTorPlugin extends TorPlugin {
 		if (!enable) wakeLock.release();
 	}
 
-	@Override
-	@ChecksSdkIntAtLeast(api = 25)
-	protected boolean canVerifyLetsEncryptCerts() {
-		return SDK_INT >= 25;
-	}
-
 	@Override
 	public void stop() {
 		super.stop();
@@ -134,43 +122,39 @@ class AndroidTorPlugin extends TorPlugin {
 		return obfs4Lib.exists() ? obfs4Lib : super.getObfs4ExecutableFile();
 	}
 
-	@Override
-	protected File getSnowflakeExecutableFile() {
-		return snowflakeLib.exists()
-				? snowflakeLib : super.getSnowflakeExecutableFile();
-	}
-
 	@Override
 	protected void installTorExecutable() throws IOException {
-		installExecutable(super.getTorExecutableFile(), torLib, TOR_LIB_NAME);
+		File extracted = super.getTorExecutableFile();
+		if (torLib.exists()) {
+			// If an older version left behind a Tor binary, delete it
+			if (extracted.exists()) {
+				if (extracted.delete()) LOG.info("Deleted Tor binary");
+				else LOG.info("Failed to delete Tor binary");
+			}
+		} else if (SDK_INT < 29) {
+			// The binary wasn't extracted at install time. Try to extract it
+			extractLibraryFromApk(TOR_LIB_NAME, extracted);
+		} else {
+			// No point extracting the binary, we won't be allowed to execute it
+			throw new FileNotFoundException(torLib.getAbsolutePath());
+		}
 	}
 
 	@Override
 	protected void installObfs4Executable() throws IOException {
-		installExecutable(super.getObfs4ExecutableFile(), obfs4Lib,
+		File extracted = super.getObfs4ExecutableFile();
-				OBFS4_LIB_NAME);
+		if (obfs4Lib.exists()) {
-	}
+			// If an older version left behind an obfs4 binary, delete it
-
-	@Override
-	protected void installSnowflakeExecutable() throws IOException {
-		installExecutable(super.getSnowflakeExecutableFile(), snowflakeLib,
-				SNOWFLAKE_LIB_NAME);
-	}
-
-	private void installExecutable(File extracted, File lib, String libName)
-			throws IOException {
-		if (lib.exists()) {
-			// If an older version left behind a binary, delete it
 			if (extracted.exists()) {
-				if (extracted.delete()) LOG.info("Deleted old binary");
+				if (extracted.delete()) LOG.info("Deleted obfs4 binary");
-				else LOG.info("Failed to delete old binary");
+				else LOG.info("Failed to delete obfs4 binary");
 			}
 		} else if (SDK_INT < 29) {
 			// The binary wasn't extracted at install time. Try to extract it
-			extractLibraryFromApk(libName, extracted);
+			extractLibraryFromApk(OBFS4_LIB_NAME, extracted);
 		} else {
 			// No point extracting the binary, we won't be allowed to execute it
-			throw new FileNotFoundException(lib.getAbsolutePath());
+			throw new FileNotFoundException(obfs4Lib.getAbsolutePath());
 		}
 	}
 

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

@@ -3,43 +3,64 @@ package org.briarproject.bramble.plugin.tor;
 import android.app.Application;
 
 import org.briarproject.bramble.api.battery.BatteryManager;
-import org.briarproject.bramble.api.crypto.CryptoComponent;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.lifecycle.IoExecutor;
 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;
 import org.briarproject.bramble.api.plugin.PluginCallback;
-import org.briarproject.bramble.api.plugin.TorControlPort;
+import org.briarproject.bramble.api.plugin.TorConstants;
 import org.briarproject.bramble.api.plugin.TorDirectory;
-import org.briarproject.bramble.api.plugin.TorSocksPort;
+import org.briarproject.bramble.api.plugin.TransportId;
+import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
+import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
 import org.briarproject.bramble.api.system.AndroidWakeLockManager;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
 import org.briarproject.bramble.api.system.ResourceProvider;
 import org.briarproject.bramble.api.system.WakefulIoExecutor;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.util.AndroidUtils;
 
 import java.io.File;
 import java.util.concurrent.Executor;
+import java.util.logging.Logger;
 
-import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;
 import javax.inject.Inject;
 import javax.net.SocketFactory;
 
-import static org.briarproject.bramble.util.AndroidUtils.getSupportedArchitectures;
-
 @Immutable
 @NotNullByDefault
-public class AndroidTorPluginFactory extends TorPluginFactory {
+public class AndroidTorPluginFactory implements DuplexPluginFactory {
 
+	private static final Logger LOG =
+			Logger.getLogger(AndroidTorPluginFactory.class.getName());
+
+	private static final int MAX_LATENCY = 30 * 1000; // 30 seconds
+	private static final int MAX_IDLE_TIME = 30 * 1000; // 30 seconds
+	private static final int MIN_POLLING_INTERVAL = 60 * 1000; // 1 minute
+	private static final int MAX_POLLING_INTERVAL = 10 * 60 * 1000; // 10 mins
+	private static final double BACKOFF_BASE = 1.2;
+
+	private final Executor ioExecutor, wakefulIoExecutor;
 	private final Application app;
+	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 BatteryManager batteryManager;
 	private final AndroidWakeLockManager wakeLockManager;
+	private final Clock clock;
+	private final File torDirectory;
 
 	@Inject
-	AndroidTorPluginFactory(@IoExecutor Executor ioExecutor,
+	public AndroidTorPluginFactory(@IoExecutor Executor ioExecutor,
 			@WakefulIoExecutor Executor wakefulIoExecutor,
+			Application app,
 			NetworkManager networkManager,
 			LocationUtils locationUtils,
 			EventBus eventBus,
@@ -48,43 +69,72 @@ public class AndroidTorPluginFactory extends TorPluginFactory {
 			ResourceProvider resourceProvider,
 			CircumventionProvider circumventionProvider,
 			BatteryManager batteryManager,
+			AndroidWakeLockManager wakeLockManager,
 			Clock clock,
-			CryptoComponent crypto,
+			@TorDirectory File torDirectory) {
-			@TorDirectory File torDirectory,
+		this.ioExecutor = ioExecutor;
-			@TorSocksPort int torSocksPort,
+		this.wakefulIoExecutor = wakefulIoExecutor;
-			@TorControlPort int torControlPort,
-			Application app,
-			AndroidWakeLockManager wakeLockManager) {
-		super(ioExecutor, wakefulIoExecutor, networkManager, locationUtils,
-				eventBus, torSocketFactory, backoffFactory, resourceProvider,
-				circumventionProvider, batteryManager, clock, crypto,
-				torDirectory, torSocksPort, torControlPort);
 		this.app = app;
+		this.networkManager = networkManager;
+		this.locationUtils = locationUtils;
+		this.eventBus = eventBus;
+		this.torSocketFactory = torSocketFactory;
+		this.backoffFactory = backoffFactory;
+		this.resourceProvider = resourceProvider;
+		this.circumventionProvider = circumventionProvider;
+		this.batteryManager = batteryManager;
 		this.wakeLockManager = wakeLockManager;
+		this.clock = clock;
+		this.torDirectory = torDirectory;
 	}
 
-	@Nullable
 	@Override
-	String getArchitectureForTorBinary() {
+	public TransportId getId() {
-		for (String abi : getSupportedArchitectures()) {
+		return TorConstants.ID;
-			if (abi.startsWith("x86_64")) return "x86_64_pie";
+	}
-			else if (abi.startsWith("x86")) return "x86_pie";
+
-			else if (abi.startsWith("arm64")) return "arm64_pie";
+	@Override
-			else if (abi.startsWith("armeabi")) return "arm_pie";
+	public int getMaxLatency() {
+		return MAX_LATENCY;
+	}
+
+	@Override
+	public DuplexPlugin createPlugin(PluginCallback callback) {
+
+		// Check that we have a Tor binary for this architecture
+		String architecture = null;
+		for (String abi : AndroidUtils.getSupportedArchitectures()) {
+			if (abi.startsWith("x86_64")) {
+				architecture = "x86_64";
+				break;
+			} else if (abi.startsWith("x86")) {
+				architecture = "x86";
+				break;
+			} else if (abi.startsWith("arm64")) {
+				architecture = "arm64";
+				break;
+			} else if (abi.startsWith("armeabi")) {
+				architecture = "arm";
+				break;
+			}
 		}
-		return null;
+		if (architecture == null) {
-	}
+			LOG.info("Tor is not supported on this architecture");
+			return null;
+		}
+		// Use position-independent executable
+		architecture += "_pie";
 
-	@Override
+		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
-	TorPlugin createPluginInstance(Backoff backoff,
+				MAX_POLLING_INTERVAL, BACKOFF_BASE);
-			TorRendezvousCrypto torRendezvousCrypto, PluginCallback callback,
+		TorRendezvousCrypto torRendezvousCrypto = new TorRendezvousCryptoImpl();
-			String architecture) {
+		AndroidTorPlugin plugin = new AndroidTorPlugin(ioExecutor,
-		return new AndroidTorPlugin(ioExecutor,
 				wakefulIoExecutor, app, networkManager, locationUtils,
 				torSocketFactory, clock, resourceProvider,
 				circumventionProvider, batteryManager, wakeLockManager,
 				backoff, torRendezvousCrypto, callback, architecture,
-				MAX_LATENCY, MAX_IDLE_TIME, torDirectory, torSocksPort,
+				MAX_LATENCY, MAX_IDLE_TIME, torDirectory);
-				torControlPort);
+		eventBus.addListener(plugin);
+		return plugin;
 	}
 }

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

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.system;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 @NotNullByDefault
 interface AlarmConstants {

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

@@ -6,8 +6,8 @@ import android.content.Context;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.system.LocationUtils;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.util.Locale;
 import java.util.logging.Logger;

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

@@ -4,8 +4,8 @@ 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 org.briarproject.nullsafety.NotNullByDefault;
 
 import java.io.InputStream;
 

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

@@ -6,25 +6,20 @@ import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothDevice;
 import android.content.ContentResolver;
 import android.content.Context;
+import android.os.Build;
 import android.os.Parcel;
 import android.os.StrictMode;
 import android.provider.Settings;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import java.io.DataOutputStream;
 import java.io.IOException;
-import java.util.Set;
 
 import javax.annotation.concurrent.Immutable;
 import javax.inject.Inject;
 
-import static android.os.Build.FINGERPRINT;
-import static android.os.Build.SERIAL;
 import static android.os.Build.VERSION.SDK_INT;
-import static android.os.Process.myPid;
-import static android.os.Process.myTid;
-import static android.os.Process.myUid;
 import static android.provider.Settings.Secure.ANDROID_ID;
 
 @Immutable
@@ -44,27 +39,22 @@ class AndroidSecureRandomProvider extends UnixSecureRandomProvider {
 	@Override
 	protected void writeToEntropyPool(DataOutputStream out) throws IOException {
 		super.writeToEntropyPool(out);
-		out.writeInt(myPid());
+		out.writeInt(android.os.Process.myPid());
-		out.writeInt(myTid());
+		out.writeInt(android.os.Process.myTid());
-		out.writeInt(myUid());
+		out.writeInt(android.os.Process.myUid());
-		if (FINGERPRINT != null) out.writeUTF(FINGERPRINT);
+		if (Build.FINGERPRINT != null) out.writeUTF(Build.FINGERPRINT);
-		if (SERIAL != null) out.writeUTF(SERIAL);
+		if (Build.SERIAL != null) out.writeUTF(Build.SERIAL);
 		ContentResolver contentResolver = appContext.getContentResolver();
 		String id = Settings.Secure.getString(contentResolver, ANDROID_ID);
 		if (id != null) out.writeUTF(id);
-		// On API 31 and higher we need permission to access bonded devices
+		Parcel parcel = Parcel.obtain();
-		if (SDK_INT < 31) {
+		BluetoothAdapter bt = BluetoothAdapter.getDefaultAdapter();
-			Parcel parcel = Parcel.obtain();
+		if (bt != null) {
-			BluetoothAdapter bt = BluetoothAdapter.getDefaultAdapter();
+			for (BluetoothDevice device : bt.getBondedDevices())
-			if (bt != null) {
+				parcel.writeParcelable(device, 0);
-				@SuppressLint("MissingPermission")
-				Set<BluetoothDevice> deviceSet = bt.getBondedDevices();
-				for (BluetoothDevice device : deviceSet)
-					parcel.writeParcelable(device, 0);
-			}
-			out.write(parcel.marshall());
-			parcel.recycle();
 		}
+		out.write(parcel.marshall());
+		parcel.recycle();
 	}
 
 	@Override
@@ -87,7 +77,7 @@ class AndroidSecureRandomProvider extends UnixSecureRandomProvider {
 					.invoke(null, (Object) seed);
 			// Mix the output of the Linux PRNG into the OpenSSL PRNG
 			int bytesRead = (Integer) Class.forName(
-							"org.apache.harmony.xnet.provider.jsse.NativeCrypto")
+					"org.apache.harmony.xnet.provider.jsse.NativeCrypto")
 					.getMethod("RAND_load_file", String.class, long.class)
 					.invoke(null, "/dev/urandom", 1024);
 			if (bytesRead != 1024) throw new IOException();

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

@@ -8,13 +8,12 @@ import android.content.Intent;
 import android.os.Process;
 import android.os.SystemClock;
 
-import org.briarproject.bramble.api.Cancellable;
 import org.briarproject.bramble.api.lifecycle.Service;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.system.AlarmListener;
 import org.briarproject.bramble.api.system.AndroidWakeLockManager;
 import org.briarproject.bramble.api.system.TaskScheduler;
 import org.briarproject.bramble.api.system.Wakeful;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -41,7 +40,6 @@ import static java.util.logging.Level.INFO;
 import static java.util.logging.Logger.getLogger;
 import static org.briarproject.bramble.system.AlarmConstants.EXTRA_PID;
 import static org.briarproject.bramble.system.AlarmConstants.REQUEST_ALARM;
-import static org.briarproject.bramble.util.AndroidUtils.getImmutableFlags;
 
 @ThreadSafe
 @NotNullByDefault
@@ -118,12 +116,10 @@ class AndroidTaskScheduler implements TaskScheduler, Service, AlarmListener {
 		long dueMillis = now + MILLISECONDS.convert(delay, unit);
 		Runnable wakeful = () ->
 				wakeLockManager.executeWakefully(task, executor, "TaskHandoff");
-		// Acquire the lock before scheduling the check to ensure the check
+		Future<?> check = scheduleCheckForDueTasks(delay, unit);
-		// doesn't access the task queue before the task has been added
+		ScheduledTask s = new ScheduledTask(wakeful, dueMillis, check,
-		ScheduledTask s;
+				cancelled);
 		synchronized (lock) {
-			Future<?> check = scheduleCheckForDueTasks(delay, unit);
-			s = new ScheduledTask(wakeful, dueMillis, check, cancelled);
 			tasks.add(s);
 		}
 		return s;
@@ -140,7 +136,6 @@ class AndroidTaskScheduler implements TaskScheduler, Service, AlarmListener {
 		return schedule(wrapped, executor, delay, unit, cancelled);
 	}
 
-	@GuardedBy("lock")
 	private Future<?> scheduleCheckForDueTasks(long delay, TimeUnit unit) {
 		Runnable wakeful = () -> wakeLockManager.runWakefully(
 				this::runDueTasks, "TaskScheduler");
@@ -200,7 +195,7 @@ class AndroidTaskScheduler implements TaskScheduler, Service, AlarmListener {
 		Intent i = new Intent(app, AlarmReceiver.class);
 		i.putExtra(EXTRA_PID, android.os.Process.myPid());
 		return PendingIntent.getBroadcast(app, REQUEST_ALARM, i,
-				getImmutableFlags(FLAG_CANCEL_CURRENT));
+				FLAG_CANCEL_CURRENT);
 	}
 
 	private class ScheduledTask
@@ -211,7 +206,7 @@ class AndroidTaskScheduler implements TaskScheduler, Service, AlarmListener {
 		private final Future<?> check;
 		private final AtomicBoolean cancelled;
 
-		private ScheduledTask(Runnable task, long dueMillis,
+		public ScheduledTask(Runnable task, long dueMillis,
 				Future<?> check, AtomicBoolean cancelled) {
 			this.task = task;
 			this.dueMillis = dueMillis;

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

@@ -1,7 +1,7 @@
 package org.briarproject.bramble.system;
 
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.system.AndroidWakeLock;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.logging.Logger;

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

@@ -5,9 +5,9 @@ import android.content.Context;
 import android.content.pm.PackageManager;
 import android.os.PowerManager;
 
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.system.AndroidWakeLock;
 import org.briarproject.bramble.api.system.AndroidWakeLockManager;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.util.concurrent.Executor;
 import java.util.concurrent.ScheduledExecutorService;
@@ -18,7 +18,7 @@ import static android.content.Context.POWER_SERVICE;
 import static android.os.PowerManager.PARTIAL_WAKE_LOCK;
 import static java.util.concurrent.TimeUnit.MINUTES;
 import static java.util.concurrent.TimeUnit.SECONDS;
-import static org.briarproject.nullsafety.NullSafety.requireNonNull;
+import static org.briarproject.bramble.api.nullsafety.NullSafety.requireNonNull;
 
 @NotNullByDefault
 class AndroidWakeLockManagerImpl implements AndroidWakeLockManager {

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

@@ -3,7 +3,7 @@ package org.briarproject.bramble.system;
 import android.os.PowerManager;
 import android.os.PowerManager.WakeLock;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import java.util.concurrent.Future;
 import java.util.concurrent.ScheduledExecutorService;
@@ -18,7 +18,7 @@ import static java.util.logging.Level.FINE;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static java.util.logging.Logger.getLogger;
-import static org.briarproject.nullsafety.NullSafety.requireNonNull;
+import static org.briarproject.bramble.api.nullsafety.NullSafety.requireNonNull;
 
 @ThreadSafe
 @NotNullByDefault

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

@@ -1,7 +1,7 @@
 package org.briarproject.bramble.system;
 
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.system.AndroidWakeLock;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 @NotNullByDefault
 interface SharedWakeLock {

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

@@ -4,34 +4,25 @@ import android.annotation.SuppressLint;
 import android.bluetooth.BluetoothAdapter;
 import android.content.Context;
 import android.os.Build;
-import android.os.Looper;
 import android.provider.Settings;
 
 import org.briarproject.bramble.api.Pair;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import java.io.File;
-import java.io.IOException;
 import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
-import java.util.Scanner;
 
 import javax.annotation.Nullable;
 
-import static android.Manifest.permission.BLUETOOTH_CONNECT;
-import static android.app.PendingIntent.FLAG_IMMUTABLE;
 import static android.content.Context.MODE_PRIVATE;
-import static android.content.pm.PackageManager.PERMISSION_GRANTED;
 import static android.os.Build.VERSION.SDK_INT;
-import static android.os.Process.myPid;
-import static android.os.Process.myUid;
-import static java.lang.Runtime.getRuntime;
 import static java.util.Arrays.asList;
-import static org.briarproject.nullsafety.NullSafety.requireNonNull;
+import static org.briarproject.bramble.api.nullsafety.NullSafety.requireNonNull;
 
 @NotNullByDefault
 public class AndroidUtils {
@@ -53,11 +44,6 @@ public class AndroidUtils {
 		return abis;
 	}
 
-	public static boolean hasBtConnectPermission(Context ctx) {
-		return SDK_INT < 31 || ctx.checkPermission(BLUETOOTH_CONNECT, myPid(),
-				myUid()) == PERMISSION_GRANTED;
-	}
-
 	public static String getBluetoothAddress(Context ctx,
 			BluetoothAdapter adapter) {
 		return getBluetoothAddressAndMethod(ctx, adapter).getFirst();
@@ -65,9 +51,6 @@ public class AndroidUtils {
 
 	public static Pair<String, String> getBluetoothAddressAndMethod(Context ctx,
 			BluetoothAdapter adapter) {
-		// If we don't have permission to access the adapter's address, let
-		// the caller know we can't find it
-		if (!hasBtConnectPermission(ctx)) return new Pair<>("", "");
 		// Return the adapter's address if it's valid and not fake
 		@SuppressLint("HardwareIds")
 		String address = adapter.getAddress();
@@ -131,32 +114,12 @@ public class AndroidUtils {
 
 	/**
 	 * Returns an array of supported content types for image attachments.
+	 * GIFs can't be compressed on API < 24 so they're not supported.
+	 * <p>
+	 * TODO: Remove this restriction when large message support is added
 	 */
 	public static String[] getSupportedImageContentTypes() {
-		return new String[] {"image/jpeg", "image/png", "image/gif"};
+		if (SDK_INT < 24) return new String[] {"image/jpeg", "image/png"};
-	}
+		else return new String[] {"image/jpeg", "image/png", "image/gif"};
-
-	@Nullable
-	public static String getSystemProperty(String propName) {
-		try {
-			Process p = getRuntime().exec("getprop " + propName);
-			Scanner s = new Scanner(p.getInputStream());
-			String line = s.nextLine();
-			s.close();
-			return line;
-		} catch (SecurityException | IOException e) {
-			return null;
-		}
-	}
-
-	public static boolean isUiThread() {
-		return Looper.myLooper() == Looper.getMainLooper();
-	}
-
-	public static int getImmutableFlags(int flags) {
-		if (SDK_INT >= 23) {
-			return FLAG_IMMUTABLE | flags;
-		}
-		return flags;
 	}
 }

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

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

bramble-android/witness.gradle

@@ -1,59 +1,110 @@
 dependencyVerification {
     verify = [
-        'androidx.annotation:annotation:1.5.0:annotation-1.5.0.jar:261fb7c0210858500bab66d34354972a75166ab4182add283780b05513d6ec4a',
+        'cglib:cglib:3.2.0:cglib-3.2.0.jar:adb13bab79712ad6bdf1bd59f2a3918018a8016e722e8a357065afb9e6690861',
-        'cglib:cglib:3.2.8:cglib-3.2.8.jar:3f64de999ecc5595dc84ca8ff0879d8a34c8623f9ef3c517a53ed59023fcb9db',
+        'com.android.tools.analytics-library:protos:27.1.1:protos-27.1.1.jar:13f77e73762e58ab372d140b3a6be6903aea9775b62dd14fbc62d4cc7069c9a4',
-        'com.google.code.findbugs:annotations:3.0.1:annotations-3.0.1.jar:6b47ff0a6de0ce17cbedc3abb0828ca5bce3009d53ea47b3723ff023c4742f79',
+        'com.android.tools.analytics-library:shared:27.1.1:shared-27.1.1.jar:82930a52001410e97d809930b670f4de3002286975f046b9de5f6b777b06d366',
+        'com.android.tools.analytics-library:tracker:27.1.1:tracker-27.1.1.jar:31bc5a00be0055bac89c9b2f34751883e987cd89e3ac1783720645c164f591d9',
+        'com.android.tools.build:aapt2-proto:4.1.0-alpha01-6193524:aapt2-proto-4.1.0-alpha01-6193524.jar:17e75523e1e92dd4f222c7368ee41df9e964a508232f591e265d0c499baf9dca',
+        'com.android.tools.build:apksig:4.1.1:apksig-4.1.1.jar:e0a69da9e5a03986d608b45bbf954ef0e6a0b3f58c1b8315bd169ec08b279e72',
+        'com.android.tools.build:apkzlib:4.1.1:apkzlib-4.1.1.jar:ba4b5e419b6be0130eae7f8301c3a551ad3976f487d2e0c6852ebb175ac41127',
+        'com.android.tools.build:builder-model:4.1.1:builder-model-4.1.1.jar:e95c99cc298ad67b8deb6ced99c51abc8f59afebedad044b1a10dde14646a4dd',
+        'com.android.tools.build:builder-test-api:4.1.1:builder-test-api-4.1.1.jar:464f596ab261c051c3847406748e843770dea123f6fa5fee8a9390644e709b7a',
+        'com.android.tools.build:builder:4.1.1:builder-4.1.1.jar:0f78d4759d2f7b57b95865522ec34596ba419b9982f3b25e3449213f9c98b80d',
+        'com.android.tools.build:gradle-api:4.1.1:gradle-api-4.1.1.jar:d42e6b539e4c1353ad3546e75ec8ce11a017b97481023e8ea18577eefe374358',
+        'com.android.tools.build:manifest-merger:27.1.1:manifest-merger-27.1.1.jar:7a45fa143687859bb2e5a961dcf6ee88094d3853de0cb543dc03dbcb0f4b554b',
+        'com.android.tools.ddms:ddmlib:27.1.1:ddmlib-27.1.1.jar:da6e4bd834b6a85dae8019039849d8bd96933347dfbf460df74913ddade6e40a',
+        'com.android.tools.external.com-intellij:intellij-core:27.1.1:intellij-core-27.1.1.jar:2591a7363c4443c59bf9f793730acafce9d6ec3076e2f46716edaf53a41b6fb6',
+        'com.android.tools.external.com-intellij:kotlin-compiler:27.1.1:kotlin-compiler-27.1.1.jar:5054ae770ba788f110303c65abd6b1fa28eccf52dee1274510e201b2b81885c8',
+        'com.android.tools.external.org-jetbrains:uast:27.1.1:uast-27.1.1.jar:54cd8f6886a9d2f5641659dd5c91f626629672cd48301f7f0bd6aad9bd448714',
+        'com.android.tools.layoutlib:layoutlib-api:27.1.1:layoutlib-api-27.1.1.jar:8a9a22e3b309521ea83b724e5a89cfdac6076f52d675c0e17d77b05527bc0f8c',
+        'com.android.tools.lint:lint-api:27.1.1:lint-api-27.1.1.jar:c1d8176094cb0478786070d40533efb578ebc53529a82f6ef5bee879bdca418b',
+        'com.android.tools.lint:lint-checks:27.1.1:lint-checks-27.1.1.jar:3899c91e00bd059b40c31a9ca00cd0f8303191947608735ae1b657323693fb61',
+        'com.android.tools.lint:lint-gradle-api:27.1.1:lint-gradle-api-27.1.1.jar:26aa89d38b9825cc73229daa82a68875801c8b8491f30497ce62aff1f206eb0d',
+        'com.android.tools.lint:lint-gradle:27.1.1:lint-gradle-27.1.1.jar:f7355823ead869f4d28184ba28b7a0c693b507519a2d3705bb9848a0f35b3756',
+        'com.android.tools.lint:lint-model:27.1.1:lint-model-27.1.1.jar:bc23c0c413bdfca59dac2cd56b870d8360d009e9ec0d365e71f774bcf127971d',
+        'com.android.tools.lint:lint:27.1.1:lint-27.1.1.jar:2f6038a5398a42bd591883c3f5e5894f4ec52ca1c3683bf94fa8553c1700af81',
+        'com.android.tools:annotations:27.1.1:annotations-27.1.1.jar:ff28c504d2acb9fd1a5ffbd97ae85cf59ee18c76927525aad250509bccf2cab1',
+        'com.android.tools:common:27.1.1:common-27.1.1.jar:63d9a2a9ad6d278db319f3749b9f50bdf5457ef7020074a1bebe124e714b535c',
+        'com.android.tools:dvlib:27.1.1:dvlib-27.1.1.jar:998a54201fc1cefee5f2399215e95c42b1f64f9e1d8f4452eb8255c68ba5440f',
+        'com.android.tools:repository:27.1.1:repository-27.1.1.jar:d25b74ccabf4d876903efb375e9af6fb380d8ae0445bb74bbdcc225c1e37fa1d',
+        'com.android.tools:sdk-common:27.1.1:sdk-common-27.1.1.jar:4473ae97d0ef7061ee1de61041d5aa97405ae08e44c09cf7bb278b42e4b97c7c',
+        'com.android.tools:sdklib:27.1.1:sdklib-27.1.1.jar:08e6b83961ac9724b3c1e3d0eff971f13be6701292c77914b8794480f3391250',
+        'com.android:signflinger:4.1.1:signflinger-4.1.1.jar:0c66825988873ec2d51057fa463f54a8f18fc7326ff4530b9da363b71e97ce60',
+        'com.android:zipflinger:4.1.1:zipflinger-4.1.1.jar:0a8c3e52ac13dd031236f9fb5ba4408b1d5dcd12325a05440b36da09d8881446',
         'com.google.code.findbugs:jsr305:3.0.2:jsr305-3.0.2.jar:766ad2a0783f2687962c8ad74ceecc38a28b9f72a2d085ee438b7813e928d0c7',
-        'com.google.dagger:dagger-compiler:2.43.2:dagger-compiler-2.43.2.jar:298c020ee6ed2f4cc651ebbfdb7f8de329b07c44b618d65be117846a850e2a03',
+        'com.google.code.gson:gson:2.8.5:gson-2.8.5.jar:233a0149fc365c9f6edbd683cfe266b19bdc773be98eabdaf6b3c924b48e7d81',
-        'com.google.dagger:dagger-producers:2.43.2:dagger-producers-2.43.2.jar:e7f5d9ffc85d48a49c8e22e02833d418f7ccad5d7512f529964db5127ab915ff',
+        'com.google.dagger:dagger-compiler:2.24:dagger-compiler-2.24.jar:3c5afb955fb188da485cb2c048eff37dce0e1530b9780a0f2f7187d16d1ccc1f',
-        'com.google.dagger:dagger-spi:2.43.2:dagger-spi-2.43.2.jar:3bae8d9dadeaaa5927da6f094389a560c12c05fec3d2711d2fa79292c7a7d7ad',
+        'com.google.dagger:dagger-producers:2.24:dagger-producers-2.24.jar:f10f45b95191954d5d6b043fca9e62fb621d21bf70634b8f8476c7988b504c3a',
-        'com.google.dagger:dagger:2.43.2:dagger-2.43.2.jar:c89681f7cbbf8c527bf4ac2748515d617fdb54a1d425c08d914fdc28192b5fe4',
+        'com.google.dagger:dagger-spi:2.24:dagger-spi-2.24.jar:c038445d14dbcb4054e61bf49e05009edf26fce4fdc7ec1a9db544784f68e718',
-        'com.google.devtools.ksp:symbol-processing-api:1.7.0-1.0.6:symbol-processing-api-1.7.0-1.0.6.jar:adc29417be5ca9ff42118105fea4e36d9ef44987abfc41432309371a60198941',
+        'com.google.dagger:dagger:2.24:dagger-2.24.jar:550a6e46a6dfcdf1d764887b6090cea94f783327e50e5c73754f18facfc70b64',
-        'com.google.errorprone:error_prone_annotations:2.7.1:error_prone_annotations-2.7.1.jar:cd5257c08a246cf8628817ae71cb822be192ef91f6881ca4a3fcff4f1de1cff3',
+        'com.google.errorprone:error_prone_annotations:2.2.0:error_prone_annotations-2.2.0.jar:6ebd22ca1b9d8ec06d41de8d64e0596981d9607b42035f9ed374f9de271a481a',
+        'com.google.errorprone:error_prone_annotations:2.3.2:error_prone_annotations-2.3.2.jar:357cd6cfb067c969226c442451502aee13800a24e950fdfde77bcdb4565a668d',
         'com.google.errorprone:javac-shaded:9-dev-r4023-3:javac-shaded-9-dev-r4023-3.jar:65bfccf60986c47fbc17c9ebab0be626afc41741e0a6ec7109e0768817a36f30',
         'com.google.googlejavaformat:google-java-format:1.5:google-java-format-1.5.jar:aa19ad7850fb85178aa22f2fddb163b84d6ce4d0035872f30d4408195ca1144e',
         'com.google.guava:failureaccess:1.0.1:failureaccess-1.0.1.jar:a171ee4c734dd2da837e4b16be9df4661afab72a41adaf31eb84dfdaf936ca26',
-        'com.google.guava:guava:31.0.1-jre:guava-31.0.1-jre.jar:d5be94d65e87bd219fb3193ad1517baa55a3b88fc91d21cf735826ab5af087b9',
+        'com.google.guava:guava:27.1-jre:guava-27.1-jre.jar:4a5aa70cc968a4d137e599ad37553e5cfeed2265e8c193476d7119036c536fe7',
+        'com.google.guava:guava:28.1-jre:guava-28.1-jre.jar:30beb8b8527bd07c6e747e77f1a92122c2f29d57ce347461a4a55eb26e382da4',
         'com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava:listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar:b372a037d4230aa57fbeffdef30fd6123f9c0c2db85d0aced00c91b974f33f99',
+        'com.google.j2objc:j2objc-annotations:1.1:j2objc-annotations-1.1.jar:2994a7eb78f2710bd3d3bfb639b2c94e219cedac0d4d084d516e78c16dddecf6',
         'com.google.j2objc:j2objc-annotations:1.3:j2objc-annotations-1.3.jar:21af30c92267bd6122c0e0b4d20cccb6641a37eaf956c6540ec471d584e64a7b',
-        'com.squareup:javapoet:1.13.0:javapoet-1.13.0.jar:4c7517e848a71b36d069d12bb3bf46a70fd4cda3105d822b0ed2e19c00b69291',
+        'com.google.jimfs:jimfs:1.1:jimfs-1.1.jar:c4828e28d7c0a930af9387510b3bada7daa5c04d7c25a75c7b8b081f1c257ddd',
+        'com.google.protobuf:protobuf-java:3.10.0:protobuf-java-3.10.0.jar:161d7d61a8cb3970891c299578702fd079646e032329d6c2cabf998d191437c9',
+        'com.googlecode.json-simple:json-simple:1.1:json-simple-1.1.jar:2d9484f4c649f708f47f9a479465fc729770ee65617dca3011836602264f6439',
+        'com.squareup:javapoet:1.11.1:javapoet-1.11.1.jar:9cbf2107be499ec6e95afd36b58e3ca122a24166cdd375732e51267d64058e90',
+        '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:3.0.7:istack-commons-runtime-3.0.7.jar:6443e10ba2e259fb821d9b6becf10db5316285fc30c53cec9d7b19a3877e7fdf',
+        'com.sun.xml.fastinfoset:FastInfoset:1.2.15:FastInfoset-1.2.15.jar:785861db11ca1bd0d1956682b974ad73eb19cd3e01a4b3fa82d62eca97210aec',
+        'commons-codec:commons-codec:1.10:commons-codec-1.10.jar:4241dfa94e711d435f29a4604a3e2de5c4aa3c165e23bd066be6fc1fc4309569',
+        '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.activation:javax.activation-api:1.2.0:javax.activation-api-1.2.0.jar:43fdef0b5b6ceb31b0424b208b930c74ab58fac2ceeb7b3f6fd3aeb8b5ca4393',
         'javax.annotation:jsr250-api:1.0:jsr250-api-1.0.jar:a1a922d0d9b6d183ed3800dfac01d1e1eb159f0e8c6f94736931c1def54a941f',
         'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
-        'junit:junit:4.13.2:junit-4.13.2.jar:8e495b634469d64fb8acfa3495a065cbacc8a0fff55ce1e31007be4c16dc57d3',
+        'javax.xml.bind:jaxb-api:2.3.1:jaxb-api-2.3.1.jar:88b955a0df57880a26a74708bc34f74dcaf8ebf4e78843a28b50eae945732b06',
-        'net.bytebuddy:byte-buddy:1.9.12:byte-buddy-1.9.12.jar:3688c3d434bebc3edc5516296a2ed0f47b65e451071b4afecad84f902f0efc11',
+        'junit:junit:4.12:junit-4.12.jar:59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a',
-        'net.jcip:jcip-annotations:1.0:jcip-annotations-1.0.jar:be5805392060c71474bf6c9a67a099471274d30b83eef84bfc4e0889a4f1dcc0',
         'net.ltgt.gradle.incap:incap:0.2:incap-0.2.jar:b625b9806b0f1e4bc7a2e3457119488de3cd57ea20feedd513db070a573a4ffd',
-        'org.apache-extras.beanshell:bsh:2.0b6:bsh-2.0b6.jar:a17955976070c0573235ee662f2794a78082758b61accffce8d3f8aedcd91047',
+        'net.sf.jopt-simple:jopt-simple:4.9:jopt-simple-4.9.jar:26c5856e954b5f864db76f13b86919b59c6eecf9fd930b96baa8884626baf2f5',
-        'org.briarproject:obfs4proxy-android:0.0.14-tor2:obfs4proxy-android-0.0.14-tor2.jar:a0a93770d6760ce57d9dbd31cc7177687374e00c3361dac22ab75e3b6e0f289e',
+        'net.sf.kxml:kxml2:2.3.0:kxml2-2.3.0.jar:f264dd9f79a1fde10ce5ecc53221eff24be4c9331c830b7d52f2f08a7b633de2',
-        'org.briarproject:snowflake-android:2.5.1:snowflake-android-2.5.1.jar:88ec81c17b1b6fa884d06839dec0330e328b45c89f88c970a213ce91ca8eac87',
+        'org.apache.ant:ant-launcher:1.9.4:ant-launcher-1.9.4.jar:7bccea20b41801ca17bcbc909a78c835d0f443f12d639c77bd6ae3d05861608d',
-        'org.briarproject:tor-android:0.4.7.13-2:tor-android-0.4.7.13-2.jar:453fd463b234a2104edd7f0d02d0649cbb5c5efbe47a76df3828f55a3f90f8b5',
+        'org.apache.ant:ant:1.9.4:ant-1.9.4.jar:649ae0730251de07b8913f49286d46bba7b92d47c5f332610aa426c4f02161d8',
-        'org.checkerframework:checker-compat-qual:2.5.5:checker-compat-qual-2.5.5.jar:11d134b245e9cacc474514d2d66b5b8618f8039a1465cdc55bbc0b34e0008b7a',
+        'org.apache.commons:commons-compress:1.12:commons-compress-1.12.jar:2c1542faf343185b7cab9c3d55c8ae5471d6d095d3887a4adefdbdf2984dc0b6',
-        'org.checkerframework:checker-qual:3.12.0:checker-qual-3.12.0.jar:ff10785ac2a357ec5de9c293cb982a2cbb605c0309ea4cc1cb9b9bc6dbe7f3cb',
+        'org.apache.httpcomponents:httpclient:4.5.6:httpclient-4.5.6.jar:c03f813195e7a80e3608d0ddd8da80b21696a4c92a6a2298865bf149071551c7',
-        'org.hamcrest:hamcrest-core:2.1:hamcrest-core-2.1.jar:e09109e54a289d88506b9bfec987ddd199f4217c9464132668351b9a4f00bee9',
+        'org.apache.httpcomponents:httpcore:4.4.10:httpcore-4.4.10.jar:78ba1096561957db1b55200a159b648876430342d15d461277e62360da19f6fd',
-        'org.hamcrest:hamcrest-library:2.1:hamcrest-library-2.1.jar:b7e2b6895b3b679f0e47b6380fda391b225e9b78505db9d8bdde8d3cc8d52a21',
+        'org.apache.httpcomponents:httpmime:4.5.6:httpmime-4.5.6.jar:0b2b1102c18d3c7e05a77214b9b7501a6f6056174ae5604e0e256776eda7553e',
-        'org.hamcrest:hamcrest:2.1:hamcrest-2.1.jar:ba93b2e3a562322ba432f0a1b53addcc55cb188253319a020ed77f824e692050',
+        'org.beanshell:bsh:1.3.0:bsh-1.3.0.jar:9b04edc75d19db54f1b4e8b5355e9364384c6cf71eb0a1b9724c159d779879f8',
-        'org.jacoco:org.jacoco.agent:0.8.7:org.jacoco.agent-0.8.7.jar:9cbcc986e0fbe821a78ff1f8f7d5216f200e5eb124e7f6837d1dc4a77b28b143',
+        'org.bouncycastle:bcpkix-jdk15on:1.56:bcpkix-jdk15on-1.56.jar:7043dee4e9e7175e93e0b36f45b1ec1ecb893c5f755667e8b916eb8dd201c6ca',
-        'org.jacoco:org.jacoco.ant:0.8.7:org.jacoco.ant-0.8.7.jar:97ca96a382c3f23a44d8eb4c4e6c3742a30cb8005774a76ced0fc4806ce49605',
+        'org.bouncycastle:bcprov-jdk15on:1.56:bcprov-jdk15on-1.56.jar:963e1ee14f808ffb99897d848ddcdb28fa91ddda867eb18d303e82728f878349',
-        'org.jacoco:org.jacoco.core:0.8.7:org.jacoco.core-0.8.7.jar:ad7739b5fb5969aa1a8aead3d74ed54dc82ed012f1f10f336bd1b96e71c1a13c',
+        'org.briarproject:obfs4proxy-android:0.0.12-dev-40245c4a:obfs4proxy-android-0.0.12-dev-40245c4a.zip:8ab05a8f8391be2cb5ab2b665c281a06d9e3a756bd0f95a40a36ca927866ea82',
-        'org.jacoco:org.jacoco.report:0.8.7:org.jacoco.report-0.8.7.jar:cc89258623700a6c932592153cb528785876b6da183d5431f97efbba6f020e5b',
+        'org.briarproject:tor-android:0.3.5.13:tor-android-0.3.5.13.zip:e0978db136731dae07774b722970cdae1e462fb5adc82845dd80a7e2d87f356c',
-        'org.jetbrains.kotlin:kotlin-stdlib-common:1.7.0:kotlin-stdlib-common-1.7.0.jar:59c6ff64fe9a6604afce03e8aaa75f83586c6030ac71fb0b34ee7cdefed3618f',
+        'org.checkerframework:checker-compat-qual:2.5.3:checker-compat-qual-2.5.3.jar:d76b9afea61c7c082908023f0cbc1427fab9abd2df915c8b8a3e7a509bccbc6d',
-        'org.jetbrains.kotlin:kotlin-stdlib-common:1.7.10:kotlin-stdlib-common-1.7.10.jar:19f102efe9629f8eabc63853ad15c533e47c47f91fca09285c5bde86e59f91d4',
+        'org.checkerframework:checker-qual:2.5.2:checker-qual-2.5.2.jar:64b02691c8b9d4e7700f8ee2e742dce7ea2c6e81e662b7522c9ee3bf568c040a',
-        'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.0:kotlin-stdlib-jdk7-1.7.0.jar:07e91be9b2ca20672d2bdb7e181b766e73453a2da13492b5ddaee8fa47aea239',
+        'org.checkerframework:checker-qual:2.8.1:checker-qual-2.8.1.jar:9103499008bcecd4e948da29b17864abb64304e15706444ae209d17ebe0575df',
-        'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.0:kotlin-stdlib-jdk8-1.7.0.jar:cf058e11db1dfc9944680c8c61b95ac689aaaa8a3eb30bced028100f038f030b',
+        'org.codehaus.groovy:groovy-all:2.4.15:groovy-all-2.4.15.jar:51d6c4e71782e85674239189499854359d380fb75e1a703756e3aaa5b98a5af0',
-        'org.jetbrains.kotlin:kotlin-stdlib:1.7.0:kotlin-stdlib-1.7.0.jar:aa88e9625577957f3249a46cb6e166ee09b369e600f7a11d148d16b0a6d87f05',
+        'org.codehaus.mojo:animal-sniffer-annotations:1.17:animal-sniffer-annotations-1.17.jar:92654f493ecfec52082e76354f0ebf87648dc3d5cec2e3c3cdb947c016747a53',
-        'org.jetbrains.kotlin:kotlin-stdlib:1.7.10:kotlin-stdlib-1.7.10.jar:e771fe74250a943e8f6346713201ff1d8cb95c3a5d1a91a22b65a9e04f6a8901',
+        'org.codehaus.mojo:animal-sniffer-annotations:1.18:animal-sniffer-annotations-1.18.jar:47f05852b48ee9baefef80fa3d8cea60efa4753c0013121dd7fe5eef2e5c729d',
-        'org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.5.0:kotlinx-metadata-jvm-0.5.0.jar:ca063a96639b08b9eaa0de4d65e899480740a6efbe28ab9a8681a2ced03055a4',
+        'org.glassfish.jaxb:jaxb-runtime:2.3.1:jaxb-runtime-2.3.1.jar:45fecfa5c8217ce1f3652ab95179790ec8cc0dec0384bca51cbeb94a293d9f2f',
+        'org.glassfish.jaxb:txw2:2.3.1:txw2-2.3.1.jar:34975dde1c6920f1a39791142235689bc3cd357e24d05edd8ff93b885bd68d60',
+        '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:1.3.72:kotlin-reflect-1.3.72.jar:a188d9367de1c4ee9479db630985c0597b20709c83161b1430d24edb27e38c40',
+        'org.jetbrains.kotlin:kotlin-stdlib-common:1.3.72:kotlin-stdlib-common-1.3.72.jar:5e7d1552863e480c1628b1cc39ce230ef829f5b7230106215a05acda5172203a',
+        'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.72:kotlin-stdlib-jdk7-1.3.72.jar:40566c0c08d414b9413ba556ff7f8a0b04b98b9f0f424d122dd2088510efccc4',
+        'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.72:kotlin-stdlib-jdk8-1.3.72.jar:133da70cfc07b56094282eac5c59bccd59f167ee2ead22e5282876d8bc10bf95',
+        'org.jetbrains.kotlin:kotlin-stdlib:1.3.72:kotlin-stdlib-1.3.72.jar:3856a7349ebacd6d1be6802b2fed9c4dc2c5a564ea92b6b945ac988243d4b16b',
+        'org.jetbrains.trove4j:trove4j:20160824:trove4j-20160824.jar:1917871c8deb468307a584680c87a44572f5a8b0b98c6d397fc0f5f86596dbe7',
         'org.jetbrains:annotations:13.0:annotations-13.0.jar:ace2a10dc8e2d5fd34925ecac03e4988b2c0f851650c94b8cef49ba1bd111478',
-        'org.jmock:jmock-imposters:2.12.0:jmock-imposters-2.12.0.jar:3b836269745a137c9b2347e8d7c2104845b126ef04f012d6bfd94f1a7dea7b09',
+        'org.jmock:jmock-junit4:2.8.2:jmock-junit4-2.8.2.jar:f7ee4df4f7bd7b7f1cafad3b99eb74d579f109d5992ff625347352edb55e674c',
-        'org.jmock:jmock-junit4:2.12.0:jmock-junit4-2.12.0.jar:3233062fc889637c151a24f1ee086bad04321ab7d8264fef279daff0fa27205b',
+        'org.jmock:jmock-legacy:2.8.2:jmock-legacy-2.8.2.jar:f2b985a5c08a9edb7f37612330c058809da3f6a6d63ce792426ebf8ff0d6d31b',
-        'org.jmock:jmock-legacy:2.12.0:jmock-legacy-2.12.0.jar:dea3a9cca653d082e2fe7e40232e982fe03a9984c7d67ceff24f3e03fe580dcd',
+        'org.jmock:jmock-testjar:2.8.2:jmock-testjar-2.8.2.jar:8900860f72c474e027cf97fe78dcbf154a1aa7fc62b6845c5fb4e4f3c7bc8760',
-        'org.jmock:jmock-testjar:2.12.0:jmock-testjar-2.12.0.jar:efefbcf6cd294d0e29f0c46eb2a3380d4ca4e1763ff719c69e2f2ac62f564a04',
+        'org.jmock:jmock:2.8.2:jmock-2.8.2.jar:6c73cb4a2e6dbfb61fd99c9a768539c170ab6568e57846bd60dbf19596b65b16',
-        'org.jmock:jmock:2.12.0:jmock-2.12.0.jar:266d07314c0cd343c46ff8a55601272de8cf406807caf55e6f313295f83d10be',
+        'org.jvnet.staxex:stax-ex:1.8:stax-ex-1.8.jar:95b05d9590af4154c6513b9c5dc1fb2e55b539972ba0a9ef28e9a0c01d83ad77',
-        'org.objenesis:objenesis:3.0.1:objenesis-3.0.1.jar:7a8ff780b9ff48415d7c705f60030b0acaa616e7f823c98eede3b63508d4e984',
+        'org.objenesis:objenesis:2.1:objenesis-2.1.jar:c74330cc6b806c804fd37e74487b4fe5d7c2750c5e15fbc6efa13bdee1bdef80',
-        'org.ow2.asm:asm-analysis:9.1:asm-analysis-9.1.jar:81a88041b1b8beda5a8a99646098046c48709538270c49def68abff25ac3be34',
+        'org.ow2.asm:asm-analysis:7.0:asm-analysis-7.0.jar:e981f8f650c4d900bb033650b18e122fa6b161eadd5f88978d08751f72ee8474',
-        'org.ow2.asm:asm-commons:9.1:asm-commons-9.1.jar:afcb26dc1fc12c0c4a99ada670908dd82e18dfc488caf5ee92546996b470c00c',
+        'org.ow2.asm:asm-commons:7.0:asm-commons-7.0.jar:fed348ef05958e3e846a3ac074a12af5f7936ef3d21ce44a62c4fa08a771927d',
-        'org.ow2.asm:asm-tree:9.1:asm-tree-9.1.jar:fd00afa49e9595d7646205b09cecb4a776a8ff0ba06f2d59b8f7bf9c704b4a73',
+        'org.ow2.asm:asm-tree:7.0:asm-tree-7.0.jar:cfd7a0874f9de36a999c127feeadfbfe6e04d4a71ee954d7af3d853f0be48a6c',
-        'org.ow2.asm:asm:7.1:asm-7.1.jar:4ab2fa2b6d2cc9ccb1eaa05ea329c407b47b13ed2915f62f8c4b8cc96258d4de',
+        'org.ow2.asm:asm-util:7.0:asm-util-7.0.jar:75fbbca440ef463f41c2b0ab1a80abe67e910ac486da60a7863cbcb5bae7e145',
-        'org.ow2.asm:asm:9.1:asm-9.1.jar:cda4de455fab48ff0bcb7c48b4639447d4de859a7afc30a094a986f0936beba2',
+        'org.ow2.asm:asm:5.0.4:asm-5.0.4.jar:896618ed8ae62702521a78bc7be42b7c491a08e6920a15f89a3ecdec31e9a220',
+        'org.ow2.asm:asm:7.0:asm-7.0.jar:b88ef66468b3c978ad0c97fd6e90979e56155b4ac69089ba7a44e9aa7ffe9acf',
     ]
 }

bramble-api/build.gradle

@@ -7,16 +7,13 @@ apply plugin: 'witness'
 apply from: 'witness.gradle'
 
 dependencies {
-	api 'org.briarproject:null-safety:0.1'
+	implementation "com.google.dagger:dagger:2.24"
-	api 'com.google.code.findbugs:jsr305:3.0.2'
+	implementation 'com.google.code.findbugs:jsr305:3.0.2'
-	api 'javax.inject:javax.inject:1'
-	api "com.google.dagger:dagger:$dagger_version"
 
-	implementation "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
+	testImplementation 'junit:junit:4.12'
-
+	testImplementation "org.jmock:jmock:2.8.2"
-	testImplementation "junit:junit:$junit_version"
+	testImplementation "org.jmock:jmock-junit4:2.8.2"
-	testImplementation "org.jmock:jmock:$jmock_version"
+	testImplementation "org.jmock:jmock-legacy:2.8.2"
-	testImplementation "org.jmock:jmock-junit4:$jmock_version"
 
 	signature 'org.codehaus.mojo.signature:java16:1.1@signature'
 }
@@ -26,7 +23,7 @@ configurations {
 	testOutput.extendsFrom(testCompile)
 }
 task jarTest(type: Jar, dependsOn: testClasses) {
-	from sourceSets.test.output, sourceSets.main.output
+	from sourceSets.test.output
 	classifier = 'test'
 }
 artifacts {

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

@@ -1,7 +1,7 @@
 package org.briarproject.bramble.api;
 
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.util.StringUtils;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.util.Arrays;
 

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

@@ -1,6 +0,0 @@
-package org.briarproject.bramble.api;
-
-public interface Cancellable {
-
-	void cancel();
-}

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

@@ -1,9 +0,0 @@
-package org.briarproject.bramble.api;
-
-import org.briarproject.nullsafety.NotNullByDefault;
-
-@NotNullByDefault
-public interface Consumer<T> {
-
-	void accept(T t);
-}

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

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

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

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import java.util.Collections;
 import java.util.HashMap;

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

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 @NotNullByDefault
 public interface Nameable {

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

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.Immutable;
 

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

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 @NotNullByDefault
 public interface Predicate<T> {

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

@@ -1,14 +1,8 @@
 package org.briarproject.bramble.api;
 
-import org.briarproject.bramble.util.StringUtils;
-
-import java.util.ArrayList;
 import java.util.Hashtable;
-import java.util.List;
 import java.util.Map;
 
-import javax.annotation.Nullable;
-
 public abstract class StringMap extends Hashtable<String, String> {
 
 	protected StringMap(Map<String, String> m) {
@@ -58,31 +52,4 @@ public abstract class StringMap extends Hashtable<String, String> {
 	public void putLong(String key, long value) {
 		put(key, String.valueOf(value));
 	}
-
-	@Nullable
-	public int[] getIntArray(String key) {
-		String s = get(key);
-		if (s == null) return null;
-		// Handle empty string because "".split(",") returns {""}
-		if (s.length() == 0) return new int[0];
-		String[] intStrings = s.split(",");
-		int[] ints = new int[intStrings.length];
-		try {
-			for (int i = 0; i < ints.length; i++) {
-				ints[i] = Integer.parseInt(intStrings[i]);
-			}
-		} catch (NumberFormatException e) {
-			return null;
-		}
-		return ints;
-	}
-
-	public void putIntArray(String key, int[] value) {
-		List<String> intStrings = new ArrayList<>();
-		for (int integer : value) {
-			intStrings.add(String.valueOf(integer));
-		}
-		// Puts empty string if input array value is empty
-		put(key, StringUtils.join(intStrings, ","));
-	}
 }

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

@@ -1,19 +1,19 @@
 package org.briarproject.bramble.api;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.ThreadSafe;
 
 @ThreadSafe
 @NotNullByDefault
-public class UniqueId extends Bytes {
+public abstract class UniqueId extends Bytes {
 
 	/**
 	 * The length of a unique identifier in bytes.
 	 */
 	public static final int LENGTH = 32;
 
-	public UniqueId(byte[] id) {
+	protected UniqueId(byte[] id) {
 		super(id);
 		if (id.length != LENGTH) throw new IllegalArgumentException();
 	}

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

@@ -1,35 +0,0 @@
-package org.briarproject.bramble.api;
-
-import org.briarproject.nullsafety.NotNullByDefault;
-
-import java.lang.ref.WeakReference;
-
-import javax.annotation.concurrent.GuardedBy;
-import javax.inject.Provider;
-
-/**
- * A {@link Provider} that keeps a {@link WeakReference} to the last provided
- * instance and provides the same instance again until the instance is garbage
- * collected.
- */
-@NotNullByDefault
-public abstract class WeakSingletonProvider<T> implements Provider<T> {
-
-	private final Object lock = new Object();
-	@GuardedBy("lock")
-	private WeakReference<T> ref = new WeakReference<>(null);
-
-	@Override
-	public T get() {
-		synchronized (lock) {
-			T instance = ref.get();
-			if (instance == null) {
-				instance = createInstance();
-				ref = new WeakReference<>(instance);
-			}
-			return instance;
-		}
-	}
-
-	public abstract T createInstance();
-}

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

@@ -3,7 +3,7 @@ package org.briarproject.bramble.api.account;
 import org.briarproject.bramble.api.crypto.DecryptionException;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.identity.IdentityManager;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.Nullable;
 

bramble-api/src/main/java/org/briarproject/bramble/api/cleanup/CleanupHook.java

@@ -3,9 +3,9 @@ package org.briarproject.bramble.api.cleanup;
 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.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.MessageId;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.util.Collection;
 

bramble-api/src/main/java/org/briarproject/bramble/api/cleanup/CleanupManager.java

@@ -5,9 +5,9 @@ import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.ClientId;
 import org.briarproject.bramble.api.sync.MessageId;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 /**
  * The CleanupManager is responsible for tracking the cleanup deadlines of

bramble-api/src/main/java/org/briarproject/bramble/api/cleanup/event/CleanupTimerStartedEvent.java

@@ -1,8 +1,8 @@
 package org.briarproject.bramble.api.cleanup.event;
 
 import org.briarproject.bramble.api.event.Event;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.MessageId;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.Immutable;
 

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

@@ -8,10 +8,10 @@ import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.Transaction;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.InvalidMessageException;
 import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.validation.IncomingMessageHook;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.Immutable;
 
@@ -32,31 +32,28 @@ public abstract class BdfIncomingMessageHook implements IncomingMessageHook {
 
 	/**
 	 * Called once for each incoming message that passes validation.
-	 * <p>
-	 * If an unexpected exception occurs while handling data that is assumed
-	 * to be valid (e.g. locally created metadata), it may be sensible to
-	 * rethrow the unexpected exception as a DbException so that delivery is
-	 * attempted again at next startup. This will allow delivery to succeed if
-	 * the unexpected exception was caused by a bug that has subsequently been
-	 * fixed.
 	 *
 	 * @param txn A read-write transaction
-	 * @throws DbException if a database error occurs while delivering the
+	 * @return Whether or not this message should be shared
-	 * message. Delivery will be attempted again at next startup. Throwing
+	 * @throws DbException Should only be used for real database errors.
-	 * this exception has the same effect as returning
+	 * If this is thrown, delivery will be attempted again at next startup,
-	 * {@link DeliveryAction#DEFER}.
+	 * whereas if a FormatException is thrown, the message will be permanently
-	 * @throws FormatException if the message is invalid in the context of its
+	 * invalidated.
-	 * dependencies. The message and any dependents will be marked as invalid
+	 * @throws FormatException Use this for any non-database error
-	 * and deleted along with their metadata. Throwing this exception has the
+	 * that occurs while handling remotely created data.
-	 * same effect as returning {@link DeliveryAction#REJECT}.
+	 * This includes errors that occur while handling locally created data
+	 * in a context controlled by remotely created data
+	 * (for example, parsing the metadata of a dependency
+	 * of an incoming message).
+	 * Never rethrow DbException as FormatException!
 	 */
-	protected abstract DeliveryAction incomingMessage(Transaction txn,
+	protected abstract boolean incomingMessage(Transaction txn, Message m,
-			Message m, BdfList body, BdfDictionary meta)
+			BdfList body, BdfDictionary meta) throws DbException,
-			throws DbException, FormatException;
+			FormatException;
 
 	@Override
-	public DeliveryAction incomingMessage(Transaction txn, Message m,
+	public boolean incomingMessage(Transaction txn, Message m, Metadata meta)
-			Metadata meta) throws DbException, InvalidMessageException {
+			throws DbException, InvalidMessageException {
 		try {
 			BdfList body = clientHelper.toList(m);
 			BdfDictionary metaDictionary = metadataParser.parse(meta);

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

@@ -1,8 +1,8 @@
 package org.briarproject.bramble.api.client;
 
 import org.briarproject.bramble.api.data.BdfDictionary;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.MessageId;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.util.Collection;
 import java.util.Collections;

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

@@ -4,19 +4,18 @@ import org.briarproject.bramble.api.FormatException;
 import org.briarproject.bramble.api.data.BdfList;
 import org.briarproject.bramble.api.data.MetadataEncoder;
 import org.briarproject.bramble.api.db.Metadata;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.InvalidMessageException;
 import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.MessageContext;
 import org.briarproject.bramble.api.sync.validation.MessageValidator;
 import org.briarproject.bramble.api.system.Clock;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.util.logging.Logger;
 
 import javax.annotation.concurrent.Immutable;
 
-import static java.util.logging.Logger.getLogger;
 import static org.briarproject.bramble.api.transport.TransportConstants.MAX_CLOCK_DIFFERENCE;
 
 @Immutable
@@ -24,24 +23,17 @@ import static org.briarproject.bramble.api.transport.TransportConstants.MAX_CLOC
 public abstract class BdfMessageValidator implements MessageValidator {
 
 	protected static final Logger LOG =
-			getLogger(BdfMessageValidator.class.getName());
+			Logger.getLogger(BdfMessageValidator.class.getName());
 
 	protected final ClientHelper clientHelper;
 	protected final MetadataEncoder metadataEncoder;
 	protected final Clock clock;
-	protected final boolean canonical;
-
-	protected BdfMessageValidator(ClientHelper clientHelper,
-			MetadataEncoder metadataEncoder, Clock clock, boolean canonical) {
-		this.clientHelper = clientHelper;
-		this.metadataEncoder = metadataEncoder;
-		this.clock = clock;
-		this.canonical = canonical;
-	}
 
 	protected BdfMessageValidator(ClientHelper clientHelper,
 			MetadataEncoder metadataEncoder, Clock clock) {
-		this(clientHelper, metadataEncoder, clock, true);
+		this.clientHelper = clientHelper;
+		this.metadataEncoder = metadataEncoder;
+		this.clock = clock;
 	}
 
 	protected abstract BdfMessageContext validateMessage(Message m, Group g,
@@ -57,7 +49,7 @@ public abstract class BdfMessageValidator implements MessageValidator {
 					"Timestamp is too far in the future");
 		}
 		try {
-			BdfList bodyList = clientHelper.toList(m, canonical);
+			BdfList bodyList = clientHelper.toList(m.getBody());
 			BdfMessageContext result = validateMessage(m, g, bodyList);
 			Metadata meta = metadataEncoder.encode(result.getDictionary());
 			return new MessageContext(meta, result.getDependencies());

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

@@ -9,18 +9,15 @@ import org.briarproject.bramble.api.data.BdfList;
 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.mailbox.MailboxUpdate;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.mailbox.MailboxVersion;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.properties.TransportProperties;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.MessageId;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.security.GeneralSecurityException;
 import java.util.Collection;
-import java.util.List;
 import java.util.Map;
 
 @NotNullByDefault
@@ -49,9 +46,6 @@ public interface ClientHelper {
 	BdfList getMessageAsList(Transaction txn, MessageId m) throws DbException,
 			FormatException;
 
-	BdfList getMessageAsList(Transaction txn, MessageId m, boolean canonical)
-			throws DbException, FormatException;
-
 	BdfDictionary getGroupMetadataAsDictionary(GroupId g) throws DbException,
 			FormatException;
 
@@ -109,8 +103,6 @@ public interface ClientHelper {
 
 	BdfList toList(Message m) throws FormatException;
 
-	BdfList toList(Message m, boolean canonical) throws FormatException;
-
 	BdfList toList(Author a);
 
 	byte[] sign(String label, BdfList toSign, PrivateKey privateKey)
@@ -131,25 +123,12 @@ public interface ClientHelper {
 	Map<TransportId, TransportProperties> parseAndValidateTransportPropertiesMap(
 			BdfDictionary properties) throws FormatException;
 
-	/**
-	 * Parse and validate the elements of a Mailbox update message.
-	 *
-	 * @return the parsed update message
-	 * @throws FormatException if the message elements are invalid
-	 */
-	MailboxUpdate parseAndValidateMailboxUpdate(BdfList clientSupports,
-			BdfList serverSupports, BdfDictionary properties)
-			throws FormatException;
-
-	List<MailboxVersion> parseMailboxVersionList(BdfList bdfList)
-			throws FormatException;
-
 	/**
 	 * Retrieves the contact ID from the group metadata of the given contact
 	 * group.
 	 */
 	ContactId getContactId(Transaction txn, GroupId contactGroupId)
-			throws DbException;
+			throws DbException, FormatException;
 
 	/**
 	 * Stores the given contact ID in the group metadata of the given contact

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

@@ -2,9 +2,9 @@ package org.briarproject.bramble.api.client;
 
 import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.identity.AuthorId;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.ClientId;
 import org.briarproject.bramble.api.sync.Group;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 @NotNullByDefault
 public interface ContactGroupFactory {

bramble-api/src/main/java/org/briarproject/bramble/api/connection/ConnectionManager.java

@@ -2,12 +2,11 @@ package org.briarproject.bramble.api.connection;
 
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.contact.PendingContactId;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.TransportConnectionReader;
 import org.briarproject.bramble.api.plugin.TransportConnectionWriter;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
-import org.briarproject.bramble.api.sync.OutgoingSessionRecord;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 @NotNullByDefault
 public interface ConnectionManager {
@@ -17,17 +16,6 @@ public interface ConnectionManager {
 	 */
 	void manageIncomingConnection(TransportId t, TransportConnectionReader r);
 
-	/**
-	 * Manages an incoming connection from a contact via a mailbox.
-	 * <p>
-	 * This method does not mark the tag as recognised until after the data
-	 * has been read from the {@link TransportConnectionReader}, at which
-	 * point the {@link TagController} is called to decide whether the tag
-	 * should be marked as recognised.
-	 */
-	void manageIncomingConnection(TransportId t, TransportConnectionReader r,
-			TagController c);
-
 	/**
 	 * Manages an incoming connection from a contact over a duplex transport.
 	 */
@@ -46,14 +34,6 @@ public interface ConnectionManager {
 	void manageOutgoingConnection(ContactId c, TransportId t,
 			TransportConnectionWriter w);
 
-	/**
-	 * Manages an outgoing connection to a contact via a mailbox. The IDs of
-	 * any messages sent or acked are added to the given
-	 * {@link OutgoingSessionRecord}.
-	 */
-	void manageOutgoingConnection(ContactId c, TransportId t,
-			TransportConnectionWriter w, OutgoingSessionRecord sessionRecord);
-
 	/**
 	 * Manages an outgoing connection to a contact over a duplex transport.
 	 */
@@ -66,21 +46,4 @@ public interface ConnectionManager {
 	 */
 	void manageOutgoingConnection(PendingContactId p, TransportId t,
 			DuplexTransportConnection d);
-
-	/**
-	 * An interface for controlling whether a tag should be marked as
-	 * recognised.
-	 */
-	interface TagController {
-		/**
-		 * This method is only called if a tag was read from the corresponding
-		 * {@link TransportConnectionReader} and recognised.
-		 *
-		 * @param exception True if an exception was thrown while reading from
-		 * the {@link TransportConnectionReader}, after successfully reading
-		 * and recognising the tag.
-		 * @return True if the tag should be marked as recognised.
-		 */
-		boolean shouldMarkTagAsRecognised(boolean exception);
-	}
 }

bramble-api/src/main/java/org/briarproject/bramble/api/connection/ConnectionRegistry.java

@@ -2,6 +2,7 @@ package org.briarproject.bramble.api.connection;
 
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.contact.PendingContactId;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.PluginConfig;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.event.ConnectionClosedEvent;
@@ -11,7 +12,6 @@ import org.briarproject.bramble.api.plugin.event.ContactDisconnectedEvent;
 import org.briarproject.bramble.api.rendezvous.event.RendezvousConnectionClosedEvent;
 import org.briarproject.bramble.api.rendezvous.event.RendezvousConnectionOpenedEvent;
 import org.briarproject.bramble.api.sync.Priority;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.util.Collection;
 

bramble-api/src/main/java/org/briarproject/bramble/api/connection/InterruptibleConnection.java

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.connection;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 /**
  * A duplex sync connection that can be closed by interrupting its outgoing

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

@@ -3,7 +3,7 @@ package org.briarproject.bramble.api.contact;
 import org.briarproject.bramble.api.crypto.PublicKey;
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorId;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;

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

@@ -3,8 +3,8 @@ package org.briarproject.bramble.api.contact;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.ContactExistsException;
 import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.io.IOException;
 

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

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.contact;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;

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

@@ -12,7 +12,7 @@ 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.lifecycle.LifecycleManager;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import java.security.GeneralSecurityException;
 import java.util.Collection;
@@ -107,32 +107,6 @@ public interface ContactManager {
 	 */
 	String getHandshakeLink() throws DbException;
 
-	/**
-	 * Returns the handshake link that needs to be sent to a contact we want
-	 * to add.
-	 */
-	String getHandshakeLink(Transaction txn) throws DbException;
-
-	/**
-	 * Creates a {@link PendingContact} from the given handshake link and
-	 * alias, adds it to the database and returns it.
-	 *
-	 * @param link The handshake link received from the pending contact
-	 * @param alias The alias the user has given this pending contact
-	 * @throws UnsupportedVersionException If the link uses a format version
-	 * that is not supported
-	 * @throws FormatException If the link is invalid
-	 * @throws GeneralSecurityException If the pending contact's handshake
-	 * public key is invalid
-	 * @throws ContactExistsException If a contact with the same handshake
-	 * public key already exists
-	 * @throws PendingContactExistsException If a pending contact with the same
-	 * handshake public key already exists
-	 */
-	PendingContact addPendingContact(Transaction txn, String link, String alias)
-			throws DbException, FormatException, GeneralSecurityException,
-			ContactExistsException, PendingContactExistsException;
-
 	/**
 	 * Creates a {@link PendingContact} from the given handshake link and
 	 * alias, adds it to the database and returns it.
@@ -166,24 +140,11 @@ public interface ContactManager {
 	Collection<Pair<PendingContact, PendingContactState>> getPendingContacts()
 			throws DbException;
 
-	/**
-	 * Returns a list of {@link PendingContact PendingContacts} and their
-	 * {@link PendingContactState states}.
-	 */
-	Collection<Pair<PendingContact, PendingContactState>> getPendingContacts(Transaction txn)
-			throws DbException;
-
 	/**
 	 * Removes a {@link PendingContact}.
 	 */
 	void removePendingContact(PendingContactId p) throws DbException;
 
-	/**
-	 * Removes a {@link PendingContact}.
-	 */
-	void removePendingContact(Transaction txn, PendingContactId p)
-			throws DbException;
-
 	/**
 	 * Returns the contact with the given ID.
 	 */

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

@@ -2,8 +2,8 @@ package org.briarproject.bramble.api.contact;
 
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.transport.StreamWriter;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.io.IOException;
 import java.io.InputStream;

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

@@ -1,7 +1,7 @@
 package org.briarproject.bramble.api.contact;
 
 import org.briarproject.bramble.api.crypto.PublicKey;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.Immutable;
 

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

@@ -1,8 +1,9 @@
 package org.briarproject.bramble.api.contact;
 
 import org.briarproject.bramble.api.UniqueId;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
+import javax.annotation.Nullable;
 import javax.annotation.concurrent.ThreadSafe;
 
 /**
@@ -16,4 +17,9 @@ public class PendingContactId extends UniqueId {
 	public PendingContactId(byte[] id) {
 		super(id);
 	}
+
+	@Override
+	public boolean equals(@Nullable Object o) {
+		return o instanceof PendingContactId && super.equals(o);
+	}
 }

bramble-api/src/main/java/org/briarproject/bramble/api/contact/event/ContactAddedEvent.java

@@ -2,7 +2,7 @@ package org.briarproject.bramble.api.contact.event;
 
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.event.Event;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.Immutable;
 

bramble-api/src/main/java/org/briarproject/bramble/api/contact/event/ContactAliasChangedEvent.java

@@ -1,35 +0,0 @@
-package org.briarproject.bramble.api.contact.event;
-
-import org.briarproject.bramble.api.contact.ContactId;
-import org.briarproject.bramble.api.event.Event;
-import org.briarproject.nullsafety.NotNullByDefault;
-
-import javax.annotation.Nullable;
-import javax.annotation.concurrent.Immutable;
-
-/**
- * An event that is broadcast when the alias for a contact changed.
- */
-@Immutable
-@NotNullByDefault
-public class ContactAliasChangedEvent extends Event {
-
-	private final ContactId contactId;
-	@Nullable
-	private final String alias;
-
-	public ContactAliasChangedEvent(ContactId contactId,
-			@Nullable String alias) {
-		this.contactId = contactId;
-		this.alias = alias;
-	}
-
-	public ContactId getContactId() {
-		return contactId;
-	}
-
-	@Nullable
-	public String getAlias() {
-		return alias;
-	}
-}

bramble-api/src/main/java/org/briarproject/bramble/api/contact/event/ContactRemovedEvent.java

@@ -2,7 +2,7 @@ package org.briarproject.bramble.api.contact.event;
 
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.event.Event;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.Immutable;
 

bramble-api/src/main/java/org/briarproject/bramble/api/contact/event/ContactVerifiedEvent.java

@@ -2,7 +2,7 @@ package org.briarproject.bramble.api.contact.event;
 
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.event.Event;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.Immutable;
 

bramble-api/src/main/java/org/briarproject/bramble/api/contact/event/PendingContactAddedEvent.java

@@ -2,7 +2,7 @@ package org.briarproject.bramble.api.contact.event;
 
 import org.briarproject.bramble.api.contact.PendingContact;
 import org.briarproject.bramble.api.event.Event;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.Immutable;
 

bramble-api/src/main/java/org/briarproject/bramble/api/contact/event/PendingContactRemovedEvent.java

@@ -2,7 +2,7 @@ package org.briarproject.bramble.api.contact.event;
 
 import org.briarproject.bramble.api.contact.PendingContactId;
 import org.briarproject.bramble.api.event.Event;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.Immutable;
 

bramble-api/src/main/java/org/briarproject/bramble/api/contact/event/PendingContactStateChangedEvent.java

@@ -3,7 +3,7 @@ package org.briarproject.bramble.api.contact.event;
 import org.briarproject.bramble.api.contact.PendingContactId;
 import org.briarproject.bramble.api.contact.PendingContactState;
 import org.briarproject.bramble.api.event.Event;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.Immutable;
 

bramble-api/src/main/java/org/briarproject/bramble/api/crypto/AgreementPrivateKey.java

@@ -1,7 +1,7 @@
 package org.briarproject.bramble.api.crypto;
 
 import org.briarproject.bramble.api.Bytes;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.Immutable;
 

bramble-api/src/main/java/org/briarproject/bramble/api/crypto/AgreementPublicKey.java

@@ -1,7 +1,7 @@
 package org.briarproject.bramble.api.crypto;
 
 import org.briarproject.bramble.api.Bytes;
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.Immutable;
 

bramble-api/src/main/java/org/briarproject/bramble/api/crypto/CryptoComponent.java

@@ -1,7 +1,6 @@
 package org.briarproject.bramble.api.crypto;
 
-import org.briarproject.bramble.api.UniqueId;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.nullsafety.NotNullByDefault;
 
 import java.security.GeneralSecurityException;
 import java.security.SecureRandom;
@@ -11,8 +10,6 @@ import javax.annotation.Nullable;
 @NotNullByDefault
 public interface CryptoComponent {
 
-	UniqueId generateUniqueId();
-
 	SecretKey generateSecretKey();
 
 	SecureRandom getSecureRandom();
@@ -173,13 +170,4 @@ public interface CryptoComponent {
 	 * length. The line terminator is CRLF.
 	 */
 	String asciiArmour(byte[] b, int lineLength);
-
-	/**
-	 * Encode the Onion given its public key. Specified here:
-	 * https://gitweb.torproject.org/torspec.git/tree/rend-spec-v3.txt?id=29245fd5#n2135
-	 *
-	 * @return the encoded onion, base32 chars
-	 */
-	String encodeOnion(byte[] publicKey);
-
 }

bramble-api/src/main/java/org/briarproject/bramble/api/crypto/DecryptionException.java

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.crypto;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 @NotNullByDefault
 public class DecryptionException extends Exception {

bramble-api/src/main/java/org/briarproject/bramble/api/crypto/KeyPair.java

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.crypto;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import javax.annotation.concurrent.Immutable;
 

bramble-api/src/main/java/org/briarproject/bramble/api/crypto/KeyParser.java

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.crypto;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 import java.security.GeneralSecurityException;
 

bramble-api/src/main/java/org/briarproject/bramble/api/crypto/KeyStrengthener.java

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.crypto;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 /**
  * Interface for strengthening a password-based key, for example by using a

bramble-api/src/main/java/org/briarproject/bramble/api/crypto/PasswordStrengthEstimator.java

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.crypto;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 @NotNullByDefault
 public interface PasswordStrengthEstimator {

bramble-api/src/main/java/org/briarproject/bramble/api/crypto/PrivateKey.java

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.crypto;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 /**
  * The private half of a public/private {@link KeyPair}.

bramble-api/src/main/java/org/briarproject/bramble/api/crypto/PublicKey.java

@@ -1,6 +1,6 @@
 package org.briarproject.bramble.api.crypto;
 
-import org.briarproject.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 /**
  * The public half of a public/private {@link KeyPair}.

bramble-api/src/main/java/org/briarproject/bramble/api/crypto/SecretKey.java

@@ -1,19 +1,23 @@
 package org.briarproject.bramble.api.crypto;
 
-import org.briarproject.bramble.api.Bytes;
-
 /**
  * A secret key used for encryption and/or authentication.
  */
-public class SecretKey extends Bytes {
+public class SecretKey {
 
 	/**
 	 * The length of a secret key in bytes.
 	 */
 	public static final int LENGTH = 32;
 
+	private final byte[] key;
+
 	public SecretKey(byte[] key) {
-		super(key);
 		if (key.length != LENGTH) throw new IllegalArgumentException();
+		this.key = key;
+	}
+
+	public byte[] getBytes() {
+		return key;
 	}
 }