Rewrap some lines.

Make Tor ports configurable at runtime

See merge request briar/briar!1537

.gitlab-ci.yml

@@ -33,7 +33,7 @@ test:
   stage: test
   script:
     - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom animalSnifferMain animalSnifferTest
-    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom check
+    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom compileOfficialDebugAndroidTestSources compileScreenshotDebugAndroidTestSources check
   rules:
     - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
       when: always

.idea/codeStyles/Project.xml

@@ -31,15 +31,6 @@
       <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" />
@@ -197,9 +188,9 @@
     </codeStyleSettings>
     <codeStyleSettings language="kotlin">
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
-      <option name="PARAMETER_ANNOTATION_WRAP" value="1" />
+      <indentOptions>
-      <option name="VARIABLE_ANNOTATION_WRAP" value="1" />
+        <option name="CONTINUATION_INDENT_SIZE" value="4" />
-      <option name="ENUM_CONSTANTS_WRAP" value="1" />
+      </indentOptions>
     </codeStyleSettings>
   </code_scheme>
 </component>

.idea/runConfigurations/All_tests.xml

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

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

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

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

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

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

.idea/runConfigurations/All_tests_in_briar_api.xml

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

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

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

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

.idea/runConfigurations/H2_Performance_Test.xml

@@ -1,14 +0,0 @@
-<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

@@ -1,14 +0,0 @@
-<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>

README.md

@@ -1 +1,28 @@
-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
+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)
+
+## 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

@@ -1,6 +1,7 @@
 import com.android.build.gradle.tasks.MergeResources
 
 apply plugin: 'com.android.library'
+apply plugin: 'checkstyle'
 apply plugin: 'witness'
 apply from: 'witness.gradle'
 
@@ -15,8 +16,8 @@ android {
 	defaultConfig {
 		minSdkVersion 16
 		targetSdkVersion 30
-		versionCode 10306
+		versionCode 10401
-		versionName "1.3.6"
+		versionName "1.4.1"
 		consumerProguardFiles 'proguard-rules.txt'
 
 		testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

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

@@ -29,6 +29,7 @@ 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;
@@ -48,6 +49,7 @@ 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;
 
 @NotNullByDefault
 class AndroidLanTcpPlugin extends LanTcpPlugin {
@@ -55,6 +57,13 @@ 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
@@ -130,17 +139,14 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 		if (info != null && info.getIpAddress() != 0) {
 			return new Pair<>(intToInetAddress(info.getIpAddress()), false);
 		}
-		List<InterfaceAddress> ifAddrs = getLocalInterfaceAddresses();
+		// If we're providing an access point, return its address
-		// If we're providing a normal access point, return its address
+		for (NetworkInterface iface : getNetworkInterfaces()) {
-		for (InterfaceAddress ifAddr : ifAddrs) {
+			if (AP_INTERFACE_NAME.matcher(iface.getName()).find()) {
-			if (isAndroidWifiApAddress(ifAddr)) {
+				for (InterfaceAddress ifAddr : iface.getInterfaceAddresses()) {
-				return new Pair<>(ifAddr.getAddress(), true);
+					if (isPossibleWifiApInterface(ifAddr)) {
-			}
+						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
@@ -148,33 +154,18 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
 	}
 
 	/**
-	 * Returns true if the given address belongs to a network provided by an
+	 * Returns true if the given address may belong to an interface providing
-	 * Android access point (including the access point's own address).
+	 * a wifi access point (including wifi direct legacy mode access points).
 	 * <p>
-	 * The access point's address is usually 192.168.43.1, but at least one
+	 * This method may return true for wifi client interfaces as well, but
-	 * device (Honor 8A) may use other addresses in the range 192.168.43.0/24.
+	 * we've already checked for a wifi client connection above.
 	 */
-	private boolean isAndroidWifiApAddress(InterfaceAddress ifAddr) {
+	private boolean isPossibleWifiApInterface(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;
 	}
 
 	/**

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

@@ -70,12 +70,14 @@ class AndroidTorPlugin extends TorPlugin {
 			String architecture,
 			long 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);
+				maxIdleTime, torDirectory, torSocksPort, torControlPort);
 		this.app = app;
 		wakeLock = wakeLockManager.createWakeLock("TorPlugin");
 		String nativeLibDir = app.getApplicationInfo().nativeLibraryDir;

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

@@ -11,7 +11,9 @@ 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.TorConstants;
+import org.briarproject.bramble.api.plugin.TorControlPort;
 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;
@@ -56,6 +58,8 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 	private final AndroidWakeLockManager wakeLockManager;
 	private final Clock clock;
 	private final File torDirectory;
+	private int torSocksPort;
+	private int torControlPort;
 
 	@Inject
 	AndroidTorPluginFactory(@IoExecutor Executor ioExecutor,
@@ -71,7 +75,9 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 			BatteryManager batteryManager,
 			AndroidWakeLockManager wakeLockManager,
 			Clock clock,
-			@TorDirectory File torDirectory) {
+			@TorDirectory File torDirectory,
+			@TorSocksPort int torSocksPort,
+			@TorControlPort int torControlPort) {
 		this.ioExecutor = ioExecutor;
 		this.wakefulIoExecutor = wakefulIoExecutor;
 		this.app = app;
@@ -86,6 +92,8 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 		this.wakeLockManager = wakeLockManager;
 		this.clock = clock;
 		this.torDirectory = torDirectory;
+		this.torSocksPort = torSocksPort;
+		this.torControlPort = torControlPort;
 	}
 
 	@Override
@@ -133,7 +141,8 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 				torSocketFactory, clock, resourceProvider,
 				circumventionProvider, batteryManager, wakeLockManager,
 				backoff, torRendezvousCrypto, callback, architecture,
-				MAX_LATENCY, MAX_IDLE_TIME, torDirectory);
+				MAX_LATENCY, MAX_IDLE_TIME, torDirectory, torSocksPort,
+				torControlPort);
 		eventBus.addListener(plugin);
 		return plugin;
 	}

bramble-android/witness.gradle

@@ -1,5 +1,6 @@
 dependencyVerification {
     verify = [
+        'antlr:antlr:2.7.7:antlr-2.7.7.jar:88fbda4b912596b9f56e8e12e580cc954bacfb51776ecfddd3e18fc1cf56dc4c',
         'cglib:cglib:3.2.8:cglib-3.2.8.jar:3f64de999ecc5595dc84ca8ff0879d8a34c8623f9ef3c517a53ed59023fcb9db',
         'com.android.tools.analytics-library:protos:27.1.3:protos-27.1.3.jar:0d9e6cff60b318baac250b6f5bb076a8161103338bf2749cdf1db8a5a13a1f12',
         'com.android.tools.analytics-library:shared:27.1.3:shared-27.1.3.jar:10d2a51d8f89ff4ac849888e5a9c60b10e879c30d78545ec1da4d3df7bd56ae4',
@@ -51,13 +52,17 @@ dependencyVerification {
         '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.puppycrawl.tools:checkstyle:8.27:checkstyle-8.27.jar:26c81958a112ebdfc5d7b40507bbfc8f15f606fea1e55ef5675609ddb41a6053',
         'com.squareup:javapoet:1.13.0:javapoet-1.13.0.jar:4c7517e848a71b36d069d12bb3bf46a70fd4cda3105d822b0ed2e19c00b69291',
         '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-beanutils:commons-beanutils:1.9.4:commons-beanutils-1.9.4.jar:7d938c81789028045c08c065e94be75fc280527620d5bd62b519d5838532368a',
         'commons-codec:commons-codec:1.10:commons-codec-1.10.jar:4241dfa94e711d435f29a4604a3e2de5c4aa3c165e23bd066be6fc1fc4309569',
+        'commons-collections:commons-collections:3.2.2:commons-collections-3.2.2.jar:eeeae917917144a68a741d4c0dff66aa5c5c5fd85593ff217bced3fc8ca783b8',
         'commons-logging:commons-logging:1.2:commons-logging-1.2.jar:daddea1ea0be0f56978ab3006b8ac92834afeefbd9b7e4e6316fca57df0fa636',
+        'info.picocli:picocli:4.1.1:picocli-4.1.1.jar:9238b6af4ded57dcfedf6f7dbcf2bdf334dae2f118ea2a0bd6d05066e63ee6fc',
         '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',
@@ -69,6 +74,8 @@ dependencyVerification {
         'net.ltgt.gradle.incap:incap:0.2:incap-0.2.jar:b625b9806b0f1e4bc7a2e3457119488de3cd57ea20feedd513db070a573a4ffd',
         'net.sf.jopt-simple:jopt-simple:4.9:jopt-simple-4.9.jar:26c5856e954b5f864db76f13b86919b59c6eecf9fd930b96baa8884626baf2f5',
         'net.sf.kxml:kxml2:2.3.0:kxml2-2.3.0.jar:f264dd9f79a1fde10ce5ecc53221eff24be4c9331c830b7d52f2f08a7b633de2',
+        'net.sf.saxon:Saxon-HE:9.9.1-5:Saxon-HE-9.9.1-5.jar:4b39a9e30d5b634b5e91db5f0c6937f176d4517543ababc9b5e01830b8c56620',
+        'org.antlr:antlr4-runtime:4.7.2:antlr4-runtime-4.7.2.jar:4c518b87d4bdff8b44cd8cbc1af816e944b62a3fe5b80b781501cf1f4759bbc4',
         'org.apache-extras.beanshell:bsh:2.0b6:bsh-2.0b6.jar:a17955976070c0573235ee662f2794a78082758b61accffce8d3f8aedcd91047',
         'org.apache.commons:commons-compress:1.12:commons-compress-1.12.jar:2c1542faf343185b7cab9c3d55c8ae5471d6d095d3887a4adefdbdf2984dc0b6',
         'org.apache.httpcomponents:httpclient:4.5.6:httpclient-4.5.6.jar:c03f813195e7a80e3608d0ddd8da80b21696a4c92a6a2298865bf149071551c7',

bramble-api/build.gradle

@@ -3,6 +3,7 @@ sourceCompatibility = 1.8
 targetCompatibility = 1.8
 
 apply plugin: 'ru.vyarus.animalsniffer'
+apply plugin: 'checkstyle'
 apply plugin: 'witness'
 apply from: 'witness.gradle'
 

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

@@ -10,8 +10,4 @@ public interface FeatureFlags {
 	boolean shouldEnableProfilePictures();
 
 	boolean shouldEnableDisappearingMessages();
-
-	boolean shouldEnableConnectViaBluetooth();
-
-	boolean shouldEnableTransferData();
 }

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

@@ -21,8 +21,9 @@ public interface CleanupHook {
 	 * <p>
 	 * The callee is not required to delete the messages, but the hook won't be
 	 * called again for these messages unless another cleanup timer is set (see
-	 * {@link DatabaseComponent#setCleanupTimerDuration(Transaction, MessageId, long)}
+	 * {@link DatabaseComponent#setCleanupTimerDuration(Transaction, MessageId,
-	 * and {@link DatabaseComponent#startCleanupTimer(Transaction, MessageId)}).
+	 * long)} and {@link DatabaseComponent#startCleanupTimer(Transaction,
+	 * MessageId)}).
 	 */
 	void deleteMessages(Transaction txn, GroupId g,
 			Collection<MessageId> messageIds) throws DbException;

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

@@ -18,8 +18,8 @@ import org.briarproject.bramble.api.sync.MessageId;
  * {@link CleanupTimerStartedEvent CleanupTimerStartedEvents} broadcast by the
  * {@link DatabaseComponent}.
  * <p>
- * See {@link DatabaseComponent#setCleanupTimerDuration(Transaction, MessageId, long)},
+ * See {@link DatabaseComponent#setCleanupTimerDuration(Transaction, MessageId,
- * {@link DatabaseComponent#startCleanupTimer(Transaction, MessageId)},
+ * long)}, {@link DatabaseComponent#startCleanupTimer(Transaction, MessageId)},
  * {@link DatabaseComponent#stopCleanupTimer(Transaction, MessageId)}.
  */
 @NotNullByDefault

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

@@ -10,8 +10,8 @@ public interface TorConstants {
 	String PROP_ONION_V2 = "onion";
 	String PROP_ONION_V3 = "onion3";
 
-	int SOCKS_PORT = 59050;
+	int DEFAULT_SOCKS_PORT = 59050;
-	int CONTROL_PORT = 59051;
+	int DEFAULT_CONTROL_PORT = 59051;
 
 	int CONNECT_TO_PROXY_TIMEOUT = 5000; // Milliseconds
 	int EXTRA_SOCKET_TIMEOUT = 30000; // Milliseconds

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

@@ -0,0 +1,20 @@
+package org.briarproject.bramble.api.plugin;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+import javax.inject.Qualifier;
+
+import static java.lang.annotation.ElementType.FIELD;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.ElementType.PARAMETER;
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
+/**
+ * Annotation for injecting the control port for the Tor plugin.
+ */
+@Qualifier
+@Target({FIELD, METHOD, PARAMETER})
+@Retention(RUNTIME)
+public @interface TorControlPort {
+}

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

@@ -0,0 +1,20 @@
+package org.briarproject.bramble.api.plugin;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+import javax.inject.Qualifier;
+
+import static java.lang.annotation.ElementType.FIELD;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.ElementType.PARAMETER;
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
+/**
+ * Annotation for injecting the socks port for the Tor plugin.
+ */
+@Qualifier
+@Target({FIELD, METHOD, PARAMETER})
+@Retention(RUNTIME)
+public @interface TorSocksPort {
+}

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

@@ -35,8 +35,8 @@ public interface TaskScheduler {
 
 		/**
 		 * Cancels the task if it has not already started running. If the task
-		 * is {@link #scheduleWithFixedDelay(Runnable, Executor, long, long, TimeUnit) periodic},
+		 * is {@link #scheduleWithFixedDelay(Runnable, Executor, long, long,
-		 * all future executions of the task are cancelled.
+		 * TimeUnit) periodic}, all future executions of the task are cancelled.
 		 */
 		void cancel();
 	}

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

@@ -0,0 +1,34 @@
+package org.briarproject.bramble.util;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import java.net.NetworkInterface;
+import java.net.SocketException;
+import java.util.Enumeration;
+import java.util.List;
+import java.util.logging.Logger;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.list;
+import static java.util.logging.Level.WARNING;
+import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.util.LogUtils.logException;
+
+@NotNullByDefault
+public class NetworkUtils {
+
+	private static final Logger LOG = getLogger(NetworkUtils.class.getName());
+
+	public static List<NetworkInterface> getNetworkInterfaces() {
+		try {
+			Enumeration<NetworkInterface> ifaces =
+					NetworkInterface.getNetworkInterfaces();
+			// Despite what the docs say, the return value can be null
+			//noinspection ConstantConditions
+			return ifaces == null ? emptyList() : list(ifaces);
+		} catch (SocketException e) {
+			logException(LOG, WARNING, e);
+			return emptyList();
+		}
+	}
+}

bramble-api/witness.gradle

@@ -1,17 +1,31 @@
 dependencyVerification {
     verify = [
+        'antlr:antlr:2.7.7:antlr-2.7.7.jar:88fbda4b912596b9f56e8e12e580cc954bacfb51776ecfddd3e18fc1cf56dc4c',
         'cglib:cglib:3.2.8:cglib-3.2.8.jar:3f64de999ecc5595dc84ca8ff0879d8a34c8623f9ef3c517a53ed59023fcb9db',
         'com.google.code.findbugs:annotations:3.0.1:annotations-3.0.1.jar:6b47ff0a6de0ce17cbedc3abb0828ca5bce3009d53ea47b3723ff023c4742f79',
         'com.google.code.findbugs:jsr305:3.0.2:jsr305-3.0.2.jar:766ad2a0783f2687962c8ad74ceecc38a28b9f72a2d085ee438b7813e928d0c7',
         'com.google.dagger:dagger:2.33:dagger-2.33.jar:d8798c5b8cf6b125234e33af5c6293bb9f2208ce29b57924c35b8c0be7b6bdcb',
+        'com.google.errorprone:error_prone_annotations:2.3.2:error_prone_annotations-2.3.2.jar:357cd6cfb067c969226c442451502aee13800a24e950fdfde77bcdb4565a668d',
+        'com.google.guava:failureaccess:1.0.1:failureaccess-1.0.1.jar:a171ee4c734dd2da837e4b16be9df4661afab72a41adaf31eb84dfdaf936ca26',
+        '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:1.3:j2objc-annotations-1.3.jar:21af30c92267bd6122c0e0b4d20cccb6641a37eaf956c6540ec471d584e64a7b',
+        'com.puppycrawl.tools:checkstyle:8.27:checkstyle-8.27.jar:26c81958a112ebdfc5d7b40507bbfc8f15f606fea1e55ef5675609ddb41a6053',
+        'commons-beanutils:commons-beanutils:1.9.4:commons-beanutils-1.9.4.jar:7d938c81789028045c08c065e94be75fc280527620d5bd62b519d5838532368a',
+        'commons-collections:commons-collections:3.2.2:commons-collections-3.2.2.jar:eeeae917917144a68a741d4c0dff66aa5c5c5fd85593ff217bced3fc8ca783b8',
+        'info.picocli:picocli:4.1.1:picocli-4.1.1.jar:9238b6af4ded57dcfedf6f7dbcf2bdf334dae2f118ea2a0bd6d05066e63ee6fc',
         'javax.inject:javax.inject:1:javax.inject-1.jar:91c77044a50c481636c32d916fd89c9118a72195390452c81065080f957de7ff',
         'junit:junit:4.13.2:junit-4.13.2.jar:8e495b634469d64fb8acfa3495a065cbacc8a0fff55ce1e31007be4c16dc57d3',
         'net.bytebuddy:byte-buddy:1.9.12:byte-buddy-1.9.12.jar:3688c3d434bebc3edc5516296a2ed0f47b65e451071b4afecad84f902f0efc11',
         'net.jcip:jcip-annotations:1.0:jcip-annotations-1.0.jar:be5805392060c71474bf6c9a67a099471274d30b83eef84bfc4e0889a4f1dcc0',
+        'net.sf.saxon:Saxon-HE:9.9.1-5:Saxon-HE-9.9.1-5.jar:4b39a9e30d5b634b5e91db5f0c6937f176d4517543ababc9b5e01830b8c56620',
+        'org.antlr:antlr4-runtime:4.7.2:antlr4-runtime-4.7.2.jar:4c518b87d4bdff8b44cd8cbc1af816e944b62a3fe5b80b781501cf1f4759bbc4',
         'org.apache-extras.beanshell:bsh:2.0b6:bsh-2.0b6.jar:a17955976070c0573235ee662f2794a78082758b61accffce8d3f8aedcd91047',
+        'org.checkerframework:checker-qual:2.8.1:checker-qual-2.8.1.jar:9103499008bcecd4e948da29b17864abb64304e15706444ae209d17ebe0575df',
         'org.codehaus.mojo.signature:java16:1.1:java16-1.1.signature:53799223a2c98dba2d0add810bed76315460df285c69e4f397ae6098f87dd619',
-        'org.codehaus.mojo:animal-sniffer-ant-tasks:1.16:animal-sniffer-ant-tasks-1.16.jar:890040976fbe2d584619a6a61b1fd2e925b3b5eb342a85eb2762c467c0d64e90',
+        'org.codehaus.mojo:animal-sniffer-annotations:1.18:animal-sniffer-annotations-1.18.jar:47f05852b48ee9baefef80fa3d8cea60efa4753c0013121dd7fe5eef2e5c729d',
-        'org.codehaus.mojo:animal-sniffer:1.16:animal-sniffer-1.16.jar:72be8bcc226ba43b937c722a08a07852bfa1b11400089265d5df0ee7b38b1d52',
+        'org.codehaus.mojo:animal-sniffer-ant-tasks:1.20:animal-sniffer-ant-tasks-1.20.jar:bb7d2498144118311d968bb08ff6fae3fc535fb1cb9cca8b8e9ea65b189422ac',
+        'org.codehaus.mojo:animal-sniffer:1.20:animal-sniffer-1.20.jar:80c422523c38db91260c6d78e5ee4b012862ab61cc55020c9e243dd7b5c62249',
         'org.hamcrest:hamcrest-core:2.1:hamcrest-core-2.1.jar:e09109e54a289d88506b9bfec987ddd199f4217c9464132668351b9a4f00bee9',
         'org.hamcrest:hamcrest-library:2.1:hamcrest-library-2.1.jar:b7e2b6895b3b679f0e47b6380fda391b225e9b78505db9d8bdde8d3cc8d52a21',
         'org.hamcrest:hamcrest:2.1:hamcrest-2.1.jar:ba93b2e3a562322ba432f0a1b53addcc55cb188253319a020ed77f824e692050',
@@ -21,7 +35,7 @@ dependencyVerification {
         'org.jmock:jmock-testjar:2.12.0:jmock-testjar-2.12.0.jar:efefbcf6cd294d0e29f0c46eb2a3380d4ca4e1763ff719c69e2f2ac62f564a04',
         'org.jmock:jmock:2.12.0:jmock-2.12.0.jar:266d07314c0cd343c46ff8a55601272de8cf406807caf55e6f313295f83d10be',
         'org.objenesis:objenesis:3.0.1:objenesis-3.0.1.jar:7a8ff780b9ff48415d7c705f60030b0acaa616e7f823c98eede3b63508d4e984',
-        'org.ow2.asm:asm-all:5.2:asm-all-5.2.jar:7fbffbc1db3422e2101689fd88df8384b15817b52b9b2b267b9f6d2511dc198d',
         'org.ow2.asm:asm:7.1:asm-7.1.jar:4ab2fa2b6d2cc9ccb1eaa05ea329c407b47b13ed2915f62f8c4b8cc96258d4de',
+        'org.ow2.asm:asm:9.1:asm-9.1.jar:cda4de455fab48ff0bcb7c48b4639447d4de859a7afc30a094a986f0936beba2',
     ]
 }

bramble-core/build.gradle

@@ -3,6 +3,7 @@ sourceCompatibility = 1.8
 targetCompatibility = 1.8
 
 apply plugin: 'ru.vyarus.animalsniffer'
+apply plugin: 'checkstyle'
 apply plugin: 'idea'
 apply plugin: 'witness'
 apply from: 'witness.gradle'
@@ -10,7 +11,7 @@ apply from: '../dagger.gradle'
 
 dependencies {
 	implementation project(path: ':bramble-api', configuration: 'default')
-	implementation 'com.madgag.spongycastle:core:1.58.0.0'
+	implementation 'org.bouncycastle:bcprov-jdk15on:1.69'
 	implementation 'com.h2database:h2:1.4.192' // The last version that supports Java 1.6
 	implementation 'org.bitlet:weupnp:0.1.4'
 	implementation 'net.i2p.crypto:eddsa:0.2.0'
@@ -32,6 +33,14 @@ dependencies {
 	signature 'org.codehaus.mojo.signature:java16:1.1@signature'
 }
 
+animalsniffer {
+	// Allow requireNonNull: Android desugaring rewrites it (so it's safe for us to use),
+	// and it gets used when passing method references instead of lambdas with Java 11.
+	// Note that this line allows *all* methods from java.util.Objects.
+	// That's the best that we can do with the configuration options that Animal Sniffer offers.
+	ignore 'java.util.Objects'
+}
+
 // needed to make test output available to bramble-java
 configurations {
 	testOutput.extendsFrom(testCompile)

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

@@ -4,6 +4,9 @@ import net.i2p.crypto.eddsa.EdDSAPrivateKey;
 import net.i2p.crypto.eddsa.EdDSAPublicKey;
 import net.i2p.crypto.eddsa.KeyPairGenerator;
 
+import org.bouncycastle.crypto.CryptoException;
+import org.bouncycastle.crypto.Digest;
+import org.bouncycastle.crypto.digests.Blake2bDigest;
 import org.briarproject.bramble.api.crypto.AgreementPrivateKey;
 import org.briarproject.bramble.api.crypto.AgreementPublicKey;
 import org.briarproject.bramble.api.crypto.CryptoComponent;
@@ -20,9 +23,6 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.system.SecureRandomProvider;
 import org.briarproject.bramble.util.ByteUtils;
 import org.briarproject.bramble.util.StringUtils;
-import org.spongycastle.crypto.CryptoException;
-import org.spongycastle.crypto.Digest;
-import org.spongycastle.crypto.digests.Blake2bDigest;
 import org.whispersystems.curve25519.Curve25519;
 import org.whispersystems.curve25519.Curve25519KeyPair;
 

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

@@ -1,38 +1,38 @@
 package org.briarproject.bramble.crypto;
 
+import org.bouncycastle.asn1.teletrust.TeleTrusTNamedCurves;
+import org.bouncycastle.asn1.x9.X9ECParameters;
+import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
+import org.bouncycastle.crypto.BasicAgreement;
+import org.bouncycastle.crypto.BlockCipher;
+import org.bouncycastle.crypto.CipherParameters;
+import org.bouncycastle.crypto.CryptoException;
+import org.bouncycastle.crypto.DerivationFunction;
+import org.bouncycastle.crypto.KeyEncoder;
+import org.bouncycastle.crypto.Mac;
+import org.bouncycastle.crypto.agreement.ECDHCBasicAgreement;
+import org.bouncycastle.crypto.digests.SHA256Digest;
+import org.bouncycastle.crypto.engines.AESLightEngine;
+import org.bouncycastle.crypto.engines.IESEngine;
+import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
+import org.bouncycastle.crypto.generators.EphemeralKeyPairGenerator;
+import org.bouncycastle.crypto.generators.KDF2BytesGenerator;
+import org.bouncycastle.crypto.macs.HMac;
+import org.bouncycastle.crypto.modes.CBCBlockCipher;
+import org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher;
+import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
+import org.bouncycastle.crypto.params.ECDomainParameters;
+import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
+import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
+import org.bouncycastle.crypto.params.ECPublicKeyParameters;
+import org.bouncycastle.crypto.params.IESWithCipherParameters;
+import org.bouncycastle.crypto.parsers.ECIESPublicKeyParser;
 import org.briarproject.bramble.api.crypto.KeyPair;
 import org.briarproject.bramble.api.crypto.KeyParser;
 import org.briarproject.bramble.api.crypto.PrivateKey;
 import org.briarproject.bramble.api.crypto.PublicKey;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.util.StringUtils;
-import org.spongycastle.asn1.teletrust.TeleTrusTNamedCurves;
-import org.spongycastle.asn1.x9.X9ECParameters;
-import org.spongycastle.crypto.AsymmetricCipherKeyPair;
-import org.spongycastle.crypto.BasicAgreement;
-import org.spongycastle.crypto.BlockCipher;
-import org.spongycastle.crypto.CipherParameters;
-import org.spongycastle.crypto.CryptoException;
-import org.spongycastle.crypto.DerivationFunction;
-import org.spongycastle.crypto.KeyEncoder;
-import org.spongycastle.crypto.Mac;
-import org.spongycastle.crypto.agreement.ECDHCBasicAgreement;
-import org.spongycastle.crypto.digests.SHA256Digest;
-import org.spongycastle.crypto.engines.AESLightEngine;
-import org.spongycastle.crypto.engines.IESEngine;
-import org.spongycastle.crypto.generators.ECKeyPairGenerator;
-import org.spongycastle.crypto.generators.EphemeralKeyPairGenerator;
-import org.spongycastle.crypto.generators.KDF2BytesGenerator;
-import org.spongycastle.crypto.macs.HMac;
-import org.spongycastle.crypto.modes.CBCBlockCipher;
-import org.spongycastle.crypto.paddings.PaddedBufferedBlockCipher;
-import org.spongycastle.crypto.params.AsymmetricKeyParameter;
-import org.spongycastle.crypto.params.ECDomainParameters;
-import org.spongycastle.crypto.params.ECKeyGenerationParameters;
-import org.spongycastle.crypto.params.ECPrivateKeyParameters;
-import org.spongycastle.crypto.params.ECPublicKeyParameters;
-import org.spongycastle.crypto.params.IESWithCipherParameters;
-import org.spongycastle.crypto.parsers.ECIESPublicKeyParser;
 
 import java.io.FileInputStream;
 import java.io.FileOutputStream;

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

@@ -1,9 +1,9 @@
 package org.briarproject.bramble.crypto;
 
+import org.bouncycastle.crypto.generators.SCrypt;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.util.StringUtils;
-import org.spongycastle.crypto.generators.SCrypt;
 
 import java.util.logging.Logger;
 

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

@@ -1,14 +1,14 @@
 package org.briarproject.bramble.crypto;
 
+import org.bouncycastle.crypto.params.ECDomainParameters;
+import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
+import org.bouncycastle.crypto.params.ECPublicKeyParameters;
+import org.bouncycastle.math.ec.ECCurve;
+import org.bouncycastle.math.ec.ECPoint;
 import org.briarproject.bramble.api.crypto.KeyParser;
 import org.briarproject.bramble.api.crypto.PrivateKey;
 import org.briarproject.bramble.api.crypto.PublicKey;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.spongycastle.crypto.params.ECDomainParameters;
-import org.spongycastle.crypto.params.ECPrivateKeyParameters;
-import org.spongycastle.crypto.params.ECPublicKeyParameters;
-import org.spongycastle.math.ec.ECCurve;
-import org.spongycastle.math.ec.ECPoint;
 
 import java.math.BigInteger;
 import java.security.GeneralSecurityException;

bramble-core/src/main/java/org/briarproject/bramble/crypto/Sec1PrivateKey.java

@@ -1,8 +1,8 @@
 package org.briarproject.bramble.crypto;
 
+import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
 import org.briarproject.bramble.api.crypto.PrivateKey;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.spongycastle.crypto.params.ECPrivateKeyParameters;
 
 import javax.annotation.concurrent.Immutable;
 

bramble-core/src/main/java/org/briarproject/bramble/crypto/Sec1PublicKey.java

@@ -1,8 +1,8 @@
 package org.briarproject.bramble.crypto;
 
+import org.bouncycastle.crypto.params.ECPublicKeyParameters;
 import org.briarproject.bramble.api.crypto.PublicKey;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.spongycastle.crypto.params.ECPublicKeyParameters;
 
 import javax.annotation.concurrent.Immutable;
 

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

@@ -1,5 +1,7 @@
 package org.briarproject.bramble.crypto;
 
+import org.bouncycastle.crypto.Digest;
+import org.bouncycastle.crypto.digests.Blake2bDigest;
 import org.briarproject.bramble.api.crypto.CryptoComponent;
 import org.briarproject.bramble.api.crypto.KeyPair;
 import org.briarproject.bramble.api.crypto.PublicKey;
@@ -9,8 +11,6 @@ import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.transport.IncomingKeys;
 import org.briarproject.bramble.api.transport.OutgoingKeys;
 import org.briarproject.bramble.api.transport.TransportKeys;
-import org.spongycastle.crypto.Digest;
-import org.spongycastle.crypto.digests.Blake2bDigest;
 
 import java.security.GeneralSecurityException;
 

bramble-core/src/main/java/org/briarproject/bramble/crypto/XSalsa20Poly1305AuthenticatedCipher.java

@@ -1,13 +1,13 @@
 package org.briarproject.bramble.crypto;
 
+import org.bouncycastle.crypto.DataLengthException;
+import org.bouncycastle.crypto.engines.XSalsa20Engine;
+import org.bouncycastle.crypto.generators.Poly1305KeyGenerator;
+import org.bouncycastle.crypto.macs.Poly1305;
+import org.bouncycastle.crypto.params.KeyParameter;
+import org.bouncycastle.crypto.params.ParametersWithIV;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.spongycastle.crypto.DataLengthException;
-import org.spongycastle.crypto.engines.XSalsa20Engine;
-import org.spongycastle.crypto.generators.Poly1305KeyGenerator;
-import org.spongycastle.crypto.macs.Poly1305;
-import org.spongycastle.crypto.params.KeyParameter;
-import org.spongycastle.crypto.params.ParametersWithIV;
 
 import java.security.GeneralSecurityException;
 

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

@@ -845,8 +845,8 @@ interface Database<T> {
 	 * of the given message with respect to the given contact, using the latency
 	 * of the transport over which it was sent.
 	 */
-	void updateExpiryTimeAndEta(T txn, ContactId c, MessageId m, long maxLatency)
+	void updateExpiryTimeAndEta(T txn, ContactId c, MessageId m,
-			throws DbException;
+			long maxLatency) throws DbException;
 
 	/**
 	 * Stores the given transport keys, deleting any keys they have replaced.

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

@@ -28,11 +28,9 @@ import java.net.InterfaceAddress;
 import java.net.NetworkInterface;
 import java.net.ServerSocket;
 import java.net.Socket;
-import java.net.SocketException;
 import java.net.UnknownHostException;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Enumeration;
 import java.util.List;
 import java.util.concurrent.Executor;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -53,7 +51,7 @@ import static org.briarproject.bramble.api.plugin.Plugin.State.DISABLED;
 import static org.briarproject.bramble.api.plugin.Plugin.State.INACTIVE;
 import static org.briarproject.bramble.api.plugin.Plugin.State.STARTING_STOPPING;
 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.bramble.util.PrivacyUtils.scrubSocketAddress;
 import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
 
@@ -98,7 +96,6 @@ abstract class TcpPlugin implements DuplexPlugin, EventListener {
 	/**
 	 * Returns true if connections to the given address can be attempted.
 	 */
-	@SuppressWarnings("BooleanMethodIsAlwaysInverted")
 	protected abstract boolean isConnectable(InterfaceAddress local,
 			InetSocketAddress remote);
 
@@ -398,17 +395,6 @@ abstract class TcpPlugin implements DuplexPlugin, EventListener {
 		return addrs;
 	}
 
-	private List<NetworkInterface> getNetworkInterfaces() {
-		try {
-			Enumeration<NetworkInterface> ifaces =
-					NetworkInterface.getNetworkInterfaces();
-			return ifaces == null ? emptyList() : list(ifaces);
-		} catch (SocketException e) {
-			logException(LOG, WARNING, e);
-			return emptyList();
-		}
-	}
-
 	@Override
 	public void eventOccurred(Event e) {
 		if (e instanceof SettingsUpdatedEvent) {

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

@@ -34,6 +34,7 @@ import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
 import org.briarproject.bramble.api.system.ResourceProvider;
 
+import java.io.ByteArrayInputStream;
 import java.io.EOFException;
 import java.io.File;
 import java.io.FileInputStream;
@@ -44,6 +45,7 @@ import java.io.OutputStream;
 import java.net.InetSocketAddress;
 import java.net.ServerSocket;
 import java.net.Socket;
+import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
@@ -68,13 +70,11 @@ import static java.util.logging.Level.WARNING;
 import static java.util.logging.Logger.getLogger;
 import static net.freehaven.tor.control.TorControlCommands.HS_ADDRESS;
 import static net.freehaven.tor.control.TorControlCommands.HS_PRIVKEY;
-import static org.briarproject.bramble.api.nullsafety.NullSafety.requireNonNull;
 import static org.briarproject.bramble.api.plugin.Plugin.State.ACTIVE;
 import static org.briarproject.bramble.api.plugin.Plugin.State.DISABLED;
 import static org.briarproject.bramble.api.plugin.Plugin.State.ENABLING;
 import static org.briarproject.bramble.api.plugin.Plugin.State.INACTIVE;
 import static org.briarproject.bramble.api.plugin.Plugin.State.STARTING_STOPPING;
-import static org.briarproject.bramble.api.plugin.TorConstants.CONTROL_PORT;
 import static org.briarproject.bramble.api.plugin.TorConstants.DEFAULT_PREF_PLUGIN_ENABLE;
 import static org.briarproject.bramble.api.plugin.TorConstants.DEFAULT_PREF_TOR_MOBILE;
 import static org.briarproject.bramble.api.plugin.TorConstants.DEFAULT_PREF_TOR_NETWORK;
@@ -132,8 +132,11 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private final CircumventionProvider circumventionProvider;
 	private final ResourceProvider resourceProvider;
 	private final long maxLatency;
-	private final int maxIdleTime, socketTimeout;
+	private final int maxIdleTime;
+	private final int socketTimeout;
 	private final File torDirectory, geoIpFile, configFile;
+	private int torSocksPort;
+	private int torControlPort;
 	private final File doneFile, cookieFile;
 	private final AtomicBoolean used = new AtomicBoolean(false);
 
@@ -162,7 +165,9 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			String architecture,
 			long maxLatency,
 			int maxIdleTime,
-			File torDirectory) {
+			File torDirectory,
+			int torSocksPort,
+			int torControlPort) {
 		this.ioExecutor = ioExecutor;
 		this.wakefulIoExecutor = wakefulIoExecutor;
 		this.networkManager = networkManager;
@@ -182,6 +187,8 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			socketTimeout = Integer.MAX_VALUE;
 		else socketTimeout = maxIdleTime * 2;
 		this.torDirectory = torDirectory;
+		this.torSocksPort = torSocksPort;
+		this.torControlPort = torControlPort;
 		geoIpFile = new File(torDirectory, "geoip");
 		configFile = new File(torDirectory, "torrc");
 		doneFile = new File(torDirectory, "done");
@@ -287,7 +294,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		}
 		try {
 			// Open a control connection and authenticate using the cookie file
-			controlSocket = new Socket("127.0.0.1", CONTROL_PORT);
+			controlSocket = new Socket("127.0.0.1", torControlPort);
 			controlConnection = new TorControlConnection(controlSocket);
 			controlConnection.authenticate(read(cookieFile));
 			// Tell Tor to exit when the control connection is closed
@@ -390,9 +397,23 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		return zin;
 	}
 
+	private static void append(StringBuilder strb, String name, int value) {
+		strb.append(name);
+		strb.append(" ");
+		strb.append(value);
+		strb.append("\n");
+	}
+
 	private InputStream getConfigInputStream() {
-		ClassLoader cl = getClass().getClassLoader();
+		StringBuilder strb = new StringBuilder();
-		return requireNonNull(cl.getResourceAsStream("torrc"));
+		append(strb, "ControlPort", torControlPort);
+		append(strb, "CookieAuthentication", 1);
+		append(strb, "DisableNetwork", 1);
+		append(strb, "RunAsDaemon", 1);
+		append(strb, "SafeSocks", 1);
+		append(strb, "SocksPort", torSocksPort);
+		return new ByteArrayInputStream(
+				strb.toString().getBytes(Charset.forName("UTF-8")));
 	}
 
 	private void listFiles(File f) {

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

@@ -4,10 +4,10 @@ import net.i2p.crypto.eddsa.spec.EdDSANamedCurveSpec;
 import net.i2p.crypto.eddsa.spec.EdDSANamedCurveTable;
 import net.i2p.crypto.eddsa.spec.EdDSAPrivateKeySpec;
 
+import org.bouncycastle.crypto.Digest;
+import org.bouncycastle.crypto.digests.SHA3Digest;
+import org.bouncycastle.util.encoders.Base64;
 import org.briarproject.bramble.util.Base32;
-import org.spongycastle.crypto.Digest;
-import org.spongycastle.crypto.digests.SHA3Digest;
-import org.spongycastle.util.encoders.Base64;
 
 import java.nio.charset.Charset;
 

bramble-core/src/main/java/org/briarproject/bramble/rendezvous/KeyMaterialSourceImpl.java

@@ -1,11 +1,11 @@
 package org.briarproject.bramble.rendezvous;
 
+import org.bouncycastle.crypto.engines.Salsa20Engine;
+import org.bouncycastle.crypto.params.KeyParameter;
+import org.bouncycastle.crypto.params.ParametersWithIV;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.rendezvous.KeyMaterialSource;
-import org.spongycastle.crypto.engines.Salsa20Engine;
-import org.spongycastle.crypto.params.KeyParameter;
-import org.spongycastle.crypto.params.ParametersWithIV;
 
 import javax.annotation.concurrent.GuardedBy;
 import javax.annotation.concurrent.ThreadSafe;

bramble-core/src/main/java/org/briarproject/bramble/socks/SocksModule.java

@@ -1,5 +1,7 @@
 package org.briarproject.bramble.socks;
 
+import org.briarproject.bramble.api.plugin.TorSocksPort;
+
 import java.net.InetSocketAddress;
 
 import javax.net.SocketFactory;
@@ -9,15 +11,14 @@ import dagger.Provides;
 
 import static org.briarproject.bramble.api.plugin.TorConstants.CONNECT_TO_PROXY_TIMEOUT;
 import static org.briarproject.bramble.api.plugin.TorConstants.EXTRA_SOCKET_TIMEOUT;
-import static org.briarproject.bramble.api.plugin.TorConstants.SOCKS_PORT;
 
 @Module
 public class SocksModule {
 
 	@Provides
-	SocketFactory provideTorSocketFactory() {
+	SocketFactory provideTorSocketFactory(@TorSocksPort int torSocksPort) {
 		InetSocketAddress proxy = new InetSocketAddress("127.0.0.1",
-				SOCKS_PORT);
+				torSocksPort);
 		return new SocksSocketFactory(proxy, CONNECT_TO_PROXY_TIMEOUT,
 				EXTRA_SOCKET_TIMEOUT);
 	}

bramble-core/src/main/java/org/briarproject/bramble/socks/SocksSocketFactory.java

@@ -22,7 +22,8 @@ class SocksSocketFactory extends SocketFactory {
 
 	@Override
 	public Socket createSocket() {
-		return new SocksSocket(proxy, connectToProxyTimeout, extraSocketTimeout);
+		return new SocksSocket(proxy, connectToProxyTimeout,
+				extraSocketTimeout);
 	}
 
 	@Override

bramble-core/src/main/resources/torrc

@@ -1,6 +0,0 @@
-ControlPort 59051
-CookieAuthentication 1
-DisableNetwork 1
-RunAsDaemon 1
-SafeSocks 1
-SocksPort 59050

bramble-core/src/test/java/org/briarproject/bramble/crypto/Blake2bDigestTest.java

@@ -1,9 +1,9 @@
 package org.briarproject.bramble.crypto;
 
+import org.bouncycastle.crypto.digests.Blake2bDigest;
 import org.briarproject.bramble.test.BrambleTestCase;
 import org.briarproject.bramble.util.StringUtils;
 import org.junit.Test;
-import org.spongycastle.crypto.digests.Blake2bDigest;
 
 import java.util.Random;
 

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

@@ -1,115 +0,0 @@
-package org.briarproject.bramble.crypto;
-
-import org.briarproject.bramble.test.BrambleTestCase;
-import org.junit.Test;
-import org.spongycastle.asn1.teletrust.TeleTrusTNamedCurves;
-import org.spongycastle.asn1.x9.X9ECParameters;
-import org.spongycastle.crypto.AsymmetricCipherKeyPair;
-import org.spongycastle.crypto.agreement.ECDHCBasicAgreement;
-import org.spongycastle.crypto.generators.ECKeyPairGenerator;
-import org.spongycastle.crypto.params.ECDomainParameters;
-import org.spongycastle.crypto.params.ECKeyGenerationParameters;
-import org.spongycastle.crypto.params.ECPrivateKeyParameters;
-import org.spongycastle.crypto.params.ECPublicKeyParameters;
-import org.spongycastle.math.ec.ECCurve;
-import org.spongycastle.math.ec.ECPoint;
-import org.spongycastle.math.ec.MontgomeryLadderMultiplier;
-
-import java.math.BigInteger;
-import java.security.SecureRandom;
-
-import static org.junit.Assert.assertEquals;
-
-public class EllipticCurveMultiplicationTest extends BrambleTestCase {
-
-	@Test
-	public void testMultiplierProducesSameResultsAsDefault() throws Exception {
-		// Instantiate the default implementation of the curve
-		X9ECParameters defaultX9Parameters =
-				TeleTrusTNamedCurves.getByName("brainpoolp256r1");
-		ECCurve defaultCurve = defaultX9Parameters.getCurve();
-		ECPoint defaultG = defaultX9Parameters.getG();
-		BigInteger defaultN = defaultX9Parameters.getN();
-		BigInteger defaultH = defaultX9Parameters.getH();
-		ECDomainParameters defaultParameters = new ECDomainParameters(
-				defaultCurve, defaultG, defaultN, defaultH);
-		// Instantiate an implementation using the Montgomery ladder multiplier
-		ECDomainParameters montgomeryParameters =
-				constantTime(defaultParameters);
-		// Generate two key pairs with each set of parameters, using the same
-		// deterministic PRNG for both sets of parameters
-		byte[] seed = new byte[32];
-		new SecureRandom().nextBytes(seed);
-		// Montgomery ladder multiplier
-		SecureRandom random = new PseudoSecureRandom(seed);
-		ECKeyGenerationParameters montgomeryGeneratorParams =
-				new ECKeyGenerationParameters(montgomeryParameters, random);
-		ECKeyPairGenerator montgomeryGenerator = new ECKeyPairGenerator();
-		montgomeryGenerator.init(montgomeryGeneratorParams);
-		AsymmetricCipherKeyPair montgomeryKeyPair1 =
-				montgomeryGenerator.generateKeyPair();
-		ECPrivateKeyParameters montgomeryPrivate1 =
-				(ECPrivateKeyParameters) montgomeryKeyPair1.getPrivate();
-		ECPublicKeyParameters montgomeryPublic1 =
-				(ECPublicKeyParameters) montgomeryKeyPair1.getPublic();
-		AsymmetricCipherKeyPair montgomeryKeyPair2 =
-				montgomeryGenerator.generateKeyPair();
-		ECPrivateKeyParameters montgomeryPrivate2 =
-				(ECPrivateKeyParameters) montgomeryKeyPair2.getPrivate();
-		ECPublicKeyParameters montgomeryPublic2 =
-				(ECPublicKeyParameters) montgomeryKeyPair2.getPublic();
-		// Default multiplier
-		random = new PseudoSecureRandom(seed);
-		ECKeyGenerationParameters defaultGeneratorParams =
-				new ECKeyGenerationParameters(defaultParameters, random);
-		ECKeyPairGenerator defaultGenerator = new ECKeyPairGenerator();
-		defaultGenerator.init(defaultGeneratorParams);
-		AsymmetricCipherKeyPair defaultKeyPair1 =
-				defaultGenerator.generateKeyPair();
-		ECPrivateKeyParameters defaultPrivate1 =
-				(ECPrivateKeyParameters) defaultKeyPair1.getPrivate();
-		ECPublicKeyParameters defaultPublic1 =
-				(ECPublicKeyParameters) defaultKeyPair1.getPublic();
-		AsymmetricCipherKeyPair defaultKeyPair2 =
-				defaultGenerator.generateKeyPair();
-		ECPrivateKeyParameters defaultPrivate2 =
-				(ECPrivateKeyParameters) defaultKeyPair2.getPrivate();
-		ECPublicKeyParameters defaultPublic2 =
-				(ECPublicKeyParameters) defaultKeyPair2.getPublic();
-		// The key pairs generated with both sets of parameters should be equal
-		assertEquals(montgomeryPrivate1.getD(), defaultPrivate1.getD());
-		assertEquals(montgomeryPublic1.getQ(), defaultPublic1.getQ());
-		assertEquals(montgomeryPrivate2.getD(), defaultPrivate2.getD());
-		assertEquals(montgomeryPublic2.getQ(), defaultPublic2.getQ());
-		// OK, all of the above was just sanity checks - now for the test!
-		ECDHCBasicAgreement agreement = new ECDHCBasicAgreement();
-		agreement.init(montgomeryPrivate1);
-		BigInteger sharedSecretMontgomeryMontgomery =
-				agreement.calculateAgreement(montgomeryPublic2);
-		agreement.init(montgomeryPrivate1);
-		BigInteger sharedSecretMontgomeryDefault =
-				agreement.calculateAgreement(defaultPublic2);
-		agreement.init(defaultPrivate1);
-		BigInteger sharedSecretDefaultMontgomery =
-				agreement.calculateAgreement(montgomeryPublic2);
-		agreement.init(defaultPrivate1);
-		BigInteger sharedSecretDefaultDefault =
-				agreement.calculateAgreement(defaultPublic2);
-		// Shared secrets calculated with different multipliers should be equal
-		assertEquals(sharedSecretMontgomeryMontgomery,
-				sharedSecretMontgomeryDefault);
-		assertEquals(sharedSecretMontgomeryMontgomery,
-				sharedSecretDefaultMontgomery);
-		assertEquals(sharedSecretMontgomeryMontgomery,
-				sharedSecretDefaultDefault);
-	}
-
-	private static ECDomainParameters constantTime(ECDomainParameters in) {
-		ECCurve curve = in.getCurve().configure().setMultiplier(
-				new MontgomeryLadderMultiplier()).create();
-		BigInteger x = in.getG().getAffineXCoord().toBigInteger();
-		BigInteger y = in.getG().getAffineYCoord().toBigInteger();
-		ECPoint g = curve.createPoint(x, y);
-		return new ECDomainParameters(curve, g, in.getN(), in.getH());
-	}
-}

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

@@ -3,30 +3,26 @@ package org.briarproject.bramble.crypto;
 import net.i2p.crypto.eddsa.EdDSASecurityProvider;
 import net.i2p.crypto.eddsa.KeyPairGenerator;
 
-import org.spongycastle.asn1.sec.SECNamedCurves;
+import org.bouncycastle.asn1.sec.SECNamedCurves;
-import org.spongycastle.asn1.teletrust.TeleTrusTNamedCurves;
+import org.bouncycastle.asn1.teletrust.TeleTrusTNamedCurves;
-import org.spongycastle.asn1.x9.X9ECParameters;
+import org.bouncycastle.asn1.x9.X9ECParameters;
-import org.spongycastle.crypto.AsymmetricCipherKeyPair;
+import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
-import org.spongycastle.crypto.BasicAgreement;
+import org.bouncycastle.crypto.BasicAgreement;
-import org.spongycastle.crypto.Digest;
+import org.bouncycastle.crypto.Digest;
-import org.spongycastle.crypto.agreement.ECDHBasicAgreement;
+import org.bouncycastle.crypto.agreement.ECDHBasicAgreement;
-import org.spongycastle.crypto.agreement.ECDHCBasicAgreement;
+import org.bouncycastle.crypto.agreement.ECDHCBasicAgreement;
-import org.spongycastle.crypto.digests.Blake2bDigest;
+import org.bouncycastle.crypto.digests.Blake2bDigest;
-import org.spongycastle.crypto.generators.ECKeyPairGenerator;
+import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
-import org.spongycastle.crypto.params.ECDomainParameters;
+import org.bouncycastle.crypto.params.ECDomainParameters;
-import org.spongycastle.crypto.params.ECKeyGenerationParameters;
+import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
-import org.spongycastle.crypto.params.ParametersWithRandom;
+import org.bouncycastle.crypto.params.ParametersWithRandom;
-import org.spongycastle.crypto.signers.DSADigestSigner;
+import org.bouncycastle.crypto.signers.DSADigestSigner;
-import org.spongycastle.crypto.signers.DSAKCalculator;
+import org.bouncycastle.crypto.signers.DSAKCalculator;
-import org.spongycastle.crypto.signers.ECDSASigner;
+import org.bouncycastle.crypto.signers.ECDSASigner;
-import org.spongycastle.crypto.signers.HMacDSAKCalculator;
+import org.bouncycastle.crypto.signers.HMacDSAKCalculator;
-import org.spongycastle.math.ec.ECCurve;
-import org.spongycastle.math.ec.ECPoint;
-import org.spongycastle.math.ec.MontgomeryLadderMultiplier;
 import org.whispersystems.curve25519.Curve25519;
 import org.whispersystems.curve25519.Curve25519KeyPair;
 
-import java.math.BigInteger;
 import java.security.GeneralSecurityException;
 import java.security.KeyPair;
 import java.security.Provider;
@@ -55,14 +51,12 @@ public class EllipticCurvePerformanceTest {
 		for (String name : SEC_NAMES) {
 			ECDomainParameters params =
 					convertParams(SECNamedCurves.getByName(name));
-			runTest(name + " default", params);
+			runTest(name, params);
-			runTest(name + " constant", constantTime(params));
 		}
 		for (String name : BRAINPOOL_NAMES) {
 			ECDomainParameters params =
 					convertParams(TeleTrusTNamedCurves.getByName(name));
-			runTest(name + " default", params);
+			runTest(name, params);
-			runTest(name + " constant", constantTime(params));
 		}
 		runCurve25519Test();
 		runEd25519Test();
@@ -193,13 +187,4 @@ public class EllipticCurvePerformanceTest {
 		return new ECDomainParameters(in.getCurve(), in.getG(), in.getN(),
 				in.getH());
 	}
-
-	private static ECDomainParameters constantTime(ECDomainParameters in) {
-		ECCurve curve = in.getCurve().configure().setMultiplier(
-				new MontgomeryLadderMultiplier()).create();
-		BigInteger x = in.getG().getAffineXCoord().toBigInteger();
-		BigInteger y = in.getG().getAffineYCoord().toBigInteger();
-		ECPoint g = curve.createPoint(x, y);
-		return new ECDomainParameters(curve, g, in.getN(), in.getH());
-	}
 }

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

@@ -1,11 +1,11 @@
 package org.briarproject.bramble.crypto;
 
+import org.bouncycastle.crypto.CryptoException;
 import org.briarproject.bramble.api.crypto.KeyPair;
 import org.briarproject.bramble.api.crypto.PrivateKey;
 import org.briarproject.bramble.api.crypto.PublicKey;
 import org.briarproject.bramble.test.BrambleTestCase;
 import org.junit.Test;
-import org.spongycastle.crypto.CryptoException;
 
 import java.security.SecureRandom;
 

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

@@ -1,11 +1,11 @@
 package org.briarproject.bramble.crypto;
 
+import org.bouncycastle.crypto.Digest;
+import org.bouncycastle.crypto.digests.Blake2bDigest;
+import org.bouncycastle.crypto.engines.Salsa20Engine;
+import org.bouncycastle.crypto.params.KeyParameter;
+import org.bouncycastle.crypto.params.ParametersWithIV;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.spongycastle.crypto.Digest;
-import org.spongycastle.crypto.digests.Blake2bDigest;
-import org.spongycastle.crypto.engines.Salsa20Engine;
-import org.spongycastle.crypto.params.KeyParameter;
-import org.spongycastle.crypto.params.ParametersWithIV;
 
 import javax.annotation.concurrent.NotThreadSafe;
 

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

@@ -24,16 +24,6 @@ public class TestFeatureFlagModule {
 			public boolean shouldEnableDisappearingMessages() {
 				return true;
 			}
-
-			@Override
-			public boolean shouldEnableConnectViaBluetooth() {
-				return true;
-			}
-
-			@Override
-			public boolean shouldEnableTransferData() {
-				return true;
-			}
 		};
 	}
 }

bramble-core/witness.gradle

@@ -1,5 +1,6 @@
 dependencyVerification {
     verify = [
+        'antlr:antlr:2.7.7:antlr-2.7.7.jar:88fbda4b912596b9f56e8e12e580cc954bacfb51776ecfddd3e18fc1cf56dc4c',
         'cglib:cglib:3.2.8:cglib-3.2.8.jar:3f64de999ecc5595dc84ca8ff0879d8a34c8623f9ef3c517a53ed59023fcb9db',
         'com.google.code.findbugs:annotations:3.0.1:annotations-3.0.1.jar:6b47ff0a6de0ce17cbedc3abb0828ca5bce3009d53ea47b3723ff023c4742f79',
         'com.google.code.findbugs:jsr305:3.0.2:jsr305-3.0.2.jar:766ad2a0783f2687962c8ad74ceecc38a28b9f72a2d085ee438b7813e928d0c7',
@@ -8,15 +9,21 @@ dependencyVerification {
         'com.google.dagger:dagger-spi:2.33:dagger-spi-2.33.jar:e2dcab2221b8afb9556ef0a1c83b0bd5f42552e254322a257330f754cdbbb9d4',
         'com.google.dagger:dagger:2.33:dagger-2.33.jar:d8798c5b8cf6b125234e33af5c6293bb9f2208ce29b57924c35b8c0be7b6bdcb',
         '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: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.h2database:h2:1.4.192:h2-1.4.192.jar:225b22e9857235c46c93861410b60b8c81c10dc8985f4faf188985ba5445126c',
-        'com.madgag.spongycastle:core:1.58.0.0:core-1.58.0.0.jar:199617dd5698c5a9312b898c0a4cec7ce9dd8649d07f65d91629f58229d72728',
+        'com.puppycrawl.tools:checkstyle:8.27:checkstyle-8.27.jar:26c81958a112ebdfc5d7b40507bbfc8f15f606fea1e55ef5675609ddb41a6053',
         'com.squareup:javapoet:1.13.0:javapoet-1.13.0.jar:4c7517e848a71b36d069d12bb3bf46a70fd4cda3105d822b0ed2e19c00b69291',
+        'commons-beanutils:commons-beanutils:1.9.4:commons-beanutils-1.9.4.jar:7d938c81789028045c08c065e94be75fc280527620d5bd62b519d5838532368a',
+        'commons-collections:commons-collections:3.2.2:commons-collections-3.2.2.jar:eeeae917917144a68a741d4c0dff66aa5c5c5fd85593ff217bced3fc8ca783b8',
+        'info.picocli:picocli:4.1.1:picocli-4.1.1.jar:9238b6af4ded57dcfedf6f7dbcf2bdf334dae2f118ea2a0bd6d05066e63ee6fc',
         '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',
@@ -25,15 +32,20 @@ dependencyVerification {
         'net.jcip:jcip-annotations:1.0:jcip-annotations-1.0.jar:be5805392060c71474bf6c9a67a099471274d30b83eef84bfc4e0889a4f1dcc0',
         'net.jodah:concurrentunit:0.4.2:concurrentunit-0.4.2.jar:5583078e1acf91734939e985bc9e7ee947b0e93a8eef679da6bb07bbeb47ced3',
         'net.ltgt.gradle.incap:incap:0.2:incap-0.2.jar:b625b9806b0f1e4bc7a2e3457119488de3cd57ea20feedd513db070a573a4ffd',
+        'net.sf.saxon:Saxon-HE:9.9.1-5:Saxon-HE-9.9.1-5.jar:4b39a9e30d5b634b5e91db5f0c6937f176d4517543ababc9b5e01830b8c56620',
+        'org.antlr:antlr4-runtime:4.7.2:antlr4-runtime-4.7.2.jar:4c518b87d4bdff8b44cd8cbc1af816e944b62a3fe5b80b781501cf1f4759bbc4',
         'org.apache-extras.beanshell:bsh:2.0b6:bsh-2.0b6.jar:a17955976070c0573235ee662f2794a78082758b61accffce8d3f8aedcd91047',
         'org.bitlet:weupnp:0.1.4:weupnp-0.1.4.jar:88df7e6504929d00bdb832863761385c68ab92af945b04f0770b126270a444fb',
+        'org.bouncycastle:bcprov-jdk15on:1.69:bcprov-jdk15on-1.69.jar:e469bd39f936999f256002631003ff022a22951da9d5bd9789c7abfa9763a292',
         'org.briarproject:jtorctl:0.3:jtorctl-0.3.jar:f2939238a097898998432effe93b0334d97a787972ab3a91a8973a1d309fc864',
         'org.checkerframework:checker-compat-qual:2.5.3:checker-compat-qual-2.5.3.jar:d76b9afea61c7c082908023f0cbc1427fab9abd2df915c8b8a3e7a509bccbc6d',
         'org.checkerframework:checker-qual:2.5.2:checker-qual-2.5.2.jar:64b02691c8b9d4e7700f8ee2e742dce7ea2c6e81e662b7522c9ee3bf568c040a',
+        'org.checkerframework:checker-qual:2.8.1:checker-qual-2.8.1.jar:9103499008bcecd4e948da29b17864abb64304e15706444ae209d17ebe0575df',
         'org.codehaus.mojo.signature:java16:1.1:java16-1.1.signature:53799223a2c98dba2d0add810bed76315460df285c69e4f397ae6098f87dd619',
         'org.codehaus.mojo:animal-sniffer-annotations:1.17:animal-sniffer-annotations-1.17.jar:92654f493ecfec52082e76354f0ebf87648dc3d5cec2e3c3cdb947c016747a53',
-        'org.codehaus.mojo:animal-sniffer-ant-tasks:1.16:animal-sniffer-ant-tasks-1.16.jar:890040976fbe2d584619a6a61b1fd2e925b3b5eb342a85eb2762c467c0d64e90',
+        'org.codehaus.mojo:animal-sniffer-annotations:1.18:animal-sniffer-annotations-1.18.jar:47f05852b48ee9baefef80fa3d8cea60efa4753c0013121dd7fe5eef2e5c729d',
-        'org.codehaus.mojo:animal-sniffer:1.16:animal-sniffer-1.16.jar:72be8bcc226ba43b937c722a08a07852bfa1b11400089265d5df0ee7b38b1d52',
+        'org.codehaus.mojo:animal-sniffer-ant-tasks:1.20:animal-sniffer-ant-tasks-1.20.jar:bb7d2498144118311d968bb08ff6fae3fc535fb1cb9cca8b8e9ea65b189422ac',
+        'org.codehaus.mojo:animal-sniffer:1.20:animal-sniffer-1.20.jar:80c422523c38db91260c6d78e5ee4b012862ab61cc55020c9e243dd7b5c62249',
         'org.hamcrest:hamcrest-core:2.1:hamcrest-core-2.1.jar:e09109e54a289d88506b9bfec987ddd199f4217c9464132668351b9a4f00bee9',
         'org.hamcrest:hamcrest-library:2.1:hamcrest-library-2.1.jar:b7e2b6895b3b679f0e47b6380fda391b225e9b78505db9d8bdde8d3cc8d52a21',
         'org.hamcrest:hamcrest:2.1:hamcrest-2.1.jar:ba93b2e3a562322ba432f0a1b53addcc55cb188253319a020ed77f824e692050',
@@ -48,8 +60,8 @@ dependencyVerification {
         'org.jmock:jmock-testjar:2.12.0:jmock-testjar-2.12.0.jar:efefbcf6cd294d0e29f0c46eb2a3380d4ca4e1763ff719c69e2f2ac62f564a04',
         'org.jmock:jmock:2.12.0:jmock-2.12.0.jar:266d07314c0cd343c46ff8a55601272de8cf406807caf55e6f313295f83d10be',
         'org.objenesis:objenesis:3.0.1:objenesis-3.0.1.jar:7a8ff780b9ff48415d7c705f60030b0acaa616e7f823c98eede3b63508d4e984',
-        'org.ow2.asm:asm-all:5.2:asm-all-5.2.jar:7fbffbc1db3422e2101689fd88df8384b15817b52b9b2b267b9f6d2511dc198d',
         'org.ow2.asm:asm:7.1:asm-7.1.jar:4ab2fa2b6d2cc9ccb1eaa05ea329c407b47b13ed2915f62f8c4b8cc96258d4de',
+        'org.ow2.asm:asm:9.1:asm-9.1.jar:cda4de455fab48ff0bcb7c48b4639447d4de859a7afc30a094a986f0936beba2',
         'org.whispersystems:curve25519-java:0.5.0:curve25519-java-0.5.0.jar:0aadd43cf01d11e9b58f867b3c4f25c3194e8b0623d1953d32dfbfbee009e38d',
     ]
 }

bramble-java/build.gradle

@@ -2,6 +2,7 @@ apply plugin: 'java-library'
 sourceCompatibility = 1.8
 targetCompatibility = 1.8
 
+apply plugin: 'checkstyle'
 apply plugin: 'idea'
 apply plugin: 'witness'
 apply from: 'witness.gradle'

bramble-java/src/main/java/org/briarproject/bramble/network/JavaNetworkManager.java

@@ -9,16 +9,15 @@ import java.net.Inet4Address;
 import java.net.InetAddress;
 import java.net.NetworkInterface;
 import java.net.SocketException;
-import java.util.Enumeration;
 import java.util.logging.Logger;
 
 import javax.inject.Inject;
 
-import static java.net.NetworkInterface.getNetworkInterfaces;
 import static java.util.Collections.list;
 import static java.util.logging.Level.WARNING;
 import static java.util.logging.Logger.getLogger;
 import static org.briarproject.bramble.util.LogUtils.logException;
+import static org.briarproject.bramble.util.NetworkUtils.getNetworkInterfaces;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -35,19 +34,14 @@ class JavaNetworkManager implements NetworkManager {
 	public NetworkStatus getNetworkStatus() {
 		boolean connected = false, hasIpv4 = false, hasIpv6Unicast = false;
 		try {
-			Enumeration<NetworkInterface> interfaces = getNetworkInterfaces();
+			for (NetworkInterface i : getNetworkInterfaces()) {
-			if (interfaces == null) {
+				if (i.isLoopback() || !i.isUp()) continue;
-				LOG.info("No network interfaces");
+				for (InetAddress addr : list(i.getInetAddresses())) {
-			} else {
+					connected = true;
-				for (NetworkInterface i : list(interfaces)) {
+					if (addr instanceof Inet4Address) {
-					if (i.isLoopback() || !i.isUp()) continue;
+						hasIpv4 = true;
-					for (InetAddress addr : list(i.getInetAddresses())) {
+					} else if (!addr.isMulticastAddress()) {
-						connected = true;
+						hasIpv6Unicast = true;
-						if (addr instanceof Inet4Address) {
-							hasIpv4 = true;
-						} else if (!addr.isMulticastAddress()) {
-							hasIpv6Unicast = true;
-						}
 					}
 				}
 			}

bramble-java/src/main/java/org/briarproject/bramble/plugin/modem/CountryCodes.java

@@ -81,33 +81,36 @@ class CountryCodes {
 		new Country("GA", "Gabonese Republic", "241", "00", ""),
 		new Country("GB", "United Kingdom", "44", "00", "0"),
 		new Country("GD", "Grenada", "1", "011", "4"),
-		new Country("GE", "Georgia", "995", "8**10", "8"),
+			new Country("GE", "Georgia", "995", "8**10", "8"),
-		new Country("GF", "French Guiana", "594", "00", ""),
+			new Country("GF", "French Guiana", "594", "00", ""),
-		new Country("GH", "Ghana", "233", "00", ""),
+			new Country("GH", "Ghana", "233", "00", ""),
-		new Country("GI", "Gibraltar", "350", "00", ""),
+			new Country("GI", "Gibraltar", "350", "00", ""),
-		new Country("GL", "Greenland", "299", "00", ""),
+			new Country("GL", "Greenland", "299", "00", ""),
-		new Country("GM", "Gambia", "220", "00", ""),
+			new Country("GM", "Gambia", "220", "00", ""),
-		new Country("GN", "Guinea", "224", "00", "0"),
+			new Country("GN", "Guinea", "224", "00", "0"),
-		new Country("GP", "Guadeloupe", "590", "00", ""),
+			new Country("GP", "Guadeloupe", "590", "00", ""),
-		new Country("GQ", "Equatorial Guinea", "240", "00", ""),
+			new Country("GQ", "Equatorial Guinea", "240", "00", ""),
-		new Country("GR", "Greece", "30", "00", ""),
+			new Country("GR", "Greece", "30", "00", ""),
-		new Country("GS", "South Georgia and the South Sandwich Islands", "995", "8**10", "8"),
+			new Country("GS", "South Georgia and the South Sandwich Islands",
-		new Country("GT", "Guatemala", "502", "00", ""),
+					"995", "8**10", "8"),
-		new Country("GU", "Guam", "1", "011", "1"),
+			new Country("GT", "Guatemala", "502", "00", ""),
-		new Country("GW", "Guinea-Bissau", "245", "00", ""),
+			new Country("GU", "Guam", "1", "011", "1"),
-		new Country("GY", "Guyana", "592", "001", "0"),
+			new Country("GW", "Guinea-Bissau", "245", "00", ""),
-		new Country("HK", "Hong Kong", "852", "001", ""),
+			new Country("GY", "Guyana", "592", "001", "0"),
-		new Country("HM", "Heard Island and McDonald Islands", "692", "00", "0"),
+			new Country("HK", "Hong Kong", "852", "001", ""),
-		new Country("HN", "Honduras", "504", "00", "0"),
+			new Country("HM", "Heard Island and McDonald Islands",
-		new Country("HR", "Croatia", "385", "00", "0"),
+					"692", "00", "0"),
-		new Country("HT", "Haiti", "509", "00", "0"),
+			new Country("HN", "Honduras", "504", "00", "0"),
-		new Country("HU", "Hungary", "36", "00", "06"),
+			new Country("HR", "Croatia", "385", "00", "0"),
-		new Country("ID", "Indonesia", "62", "001", "0"),
+			new Country("HT", "Haiti", "509", "00", "0"),
-		new Country("IE", "Ireland", "353", "00", "0"),
+			new Country("HU", "Hungary", "36", "00", "06"),
-		new Country("IL", "Israel", "972", "00", "0"),
+			new Country("ID", "Indonesia", "62", "001", "0"),
-		new Country("IN", "India", "91", "00", "0"),
+			new Country("IE", "Ireland", "353", "00", "0"),
-		new Country("IO", "British Indian Ocean Territory", "246", "00", ""),
+			new Country("IL", "Israel", "972", "00", "0"),
-		new Country("IQ", "Iraq", "964", "00", "0"),
+			new Country("IN", "India", "91", "00", "0"),
+			new Country("IO", "British Indian Ocean Territory", "246", "00",
+					""),
+			new Country("IQ", "Iraq", "964", "00", "0"),
 		new Country("IR", "Iran", "98", "00", "0"),
 		new Country("IS", "Iceland", "354", "00", "0"),
 		new Country("IT", "Italy", "39", "00", ""),

bramble-java/src/main/java/org/briarproject/bramble/plugin/modem/SerialPortImpl.java

@@ -28,7 +28,8 @@ class SerialPortImpl implements SerialPort {
 	@Override
 	public void closePort() throws IOException {
 		try {
-			if (!port.closePort()) throw new IOException("Failed to close port");
+			if (!port.closePort())
+				throw new IOException("Failed to close port");
 		} catch (SerialPortException e) {
 			throw new IOException(e);
 		}

bramble-java/src/main/java/org/briarproject/bramble/plugin/tor/JavaTorPlugin.java

@@ -35,12 +35,15 @@ abstract class JavaTorPlugin extends TorPlugin {
 			String architecture,
 			long 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);
+				maxLatency, maxIdleTime, torDirectory, torSocksPort,
+				torControlPort);
 	}
 
 	@Override

bramble-java/src/main/java/org/briarproject/bramble/plugin/tor/UnixTorPlugin.java

@@ -35,12 +35,15 @@ class UnixTorPlugin extends JavaTorPlugin {
 			String architecture,
 			long 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);
+				maxLatency, maxIdleTime, torDirectory, torSocksPort,
+				torControlPort);
 	}
 
 	@Override

bramble-java/src/main/java/org/briarproject/bramble/plugin/tor/UnixTorPluginFactory.java

@@ -9,7 +9,9 @@ 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.TorConstants;
+import org.briarproject.bramble.api.plugin.TorControlPort;
 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;
@@ -54,6 +56,8 @@ public class UnixTorPluginFactory implements DuplexPluginFactory {
 	private final BatteryManager batteryManager;
 	private final Clock clock;
 	private final File torDirectory;
+	private int torSocksPort;
+	private int torControlPort;
 
 	@Inject
 	UnixTorPluginFactory(@IoExecutor Executor ioExecutor,
@@ -67,7 +71,9 @@ public class UnixTorPluginFactory implements DuplexPluginFactory {
 			CircumventionProvider circumventionProvider,
 			BatteryManager batteryManager,
 			Clock clock,
-			@TorDirectory File torDirectory) {
+			@TorDirectory File torDirectory,
+			@TorSocksPort int torSocksPort,
+			@TorControlPort int torControlPort) {
 		this.ioExecutor = ioExecutor;
 		this.wakefulIoExecutor = wakefulIoExecutor;
 		this.networkManager = networkManager;
@@ -80,6 +86,8 @@ public class UnixTorPluginFactory implements DuplexPluginFactory {
 		this.batteryManager = batteryManager;
 		this.clock = clock;
 		this.torDirectory = torDirectory;
+		this.torSocksPort = torSocksPort;
+		this.torControlPort = torControlPort;
 	}
 
 	@Override
@@ -125,7 +133,8 @@ public class UnixTorPluginFactory implements DuplexPluginFactory {
 				networkManager, locationUtils, torSocketFactory, clock,
 				resourceProvider, circumventionProvider, batteryManager,
 				backoff, torRendezvousCrypto, callback, architecture,
-				MAX_LATENCY, MAX_IDLE_TIME, torDirectory);
+				MAX_LATENCY, MAX_IDLE_TIME, torDirectory, torSocksPort,
+				torControlPort);
 		eventBus.addListener(plugin);
 		return plugin;
 	}

bramble-java/src/test/java/org/briarproject/bramble/plugin/tor/BridgeTest.java

@@ -36,6 +36,8 @@ import static java.util.Collections.singletonList;
 import static java.util.concurrent.TimeUnit.SECONDS;
 import static java.util.logging.Logger.getLogger;
 import static org.briarproject.bramble.api.plugin.Plugin.State.ACTIVE;
+import static org.briarproject.bramble.api.plugin.TorConstants.DEFAULT_CONTROL_PORT;
+import static org.briarproject.bramble.api.plugin.TorConstants.DEFAULT_SOCKS_PORT;
 import static org.briarproject.bramble.test.TestUtils.deleteTestDirectory;
 import static org.briarproject.bramble.test.TestUtils.getTestDirectory;
 import static org.briarproject.bramble.test.TestUtils.isOptionalTestEnabled;
@@ -139,7 +141,8 @@ public class BridgeTest extends BrambleTestCase {
 		factory = new UnixTorPluginFactory(ioExecutor, wakefulIoExecutor,
 				networkManager, locationUtils, eventBus, torSocketFactory,
 				backoffFactory, resourceProvider, bridgeProvider,
-				batteryManager, clock, torDir);
+				batteryManager, clock, torDir, DEFAULT_SOCKS_PORT,
+				DEFAULT_CONTROL_PORT);
 	}
 
 	@After

bramble-java/witness.gradle

@@ -1,5 +1,6 @@
 dependencyVerification {
     verify = [
+        'antlr:antlr:2.7.7:antlr-2.7.7.jar:88fbda4b912596b9f56e8e12e580cc954bacfb51776ecfddd3e18fc1cf56dc4c',
         'cglib:cglib:3.2.8:cglib-3.2.8.jar:3f64de999ecc5595dc84ca8ff0879d8a34c8623f9ef3c517a53ed59023fcb9db',
         'com.google.code.findbugs:annotations:3.0.1:annotations-3.0.1.jar:6b47ff0a6de0ce17cbedc3abb0828ca5bce3009d53ea47b3723ff023c4742f79',
         'com.google.code.findbugs:jsr305:3.0.2:jsr305-3.0.2.jar:766ad2a0783f2687962c8ad74ceecc38a28b9f72a2d085ee438b7813e928d0c7',
@@ -8,13 +9,20 @@ dependencyVerification {
         'com.google.dagger:dagger-spi:2.33:dagger-spi-2.33.jar:e2dcab2221b8afb9556ef0a1c83b0bd5f42552e254322a257330f754cdbbb9d4',
         'com.google.dagger:dagger:2.33:dagger-2.33.jar:d8798c5b8cf6b125234e33af5c6293bb9f2208ce29b57924c35b8c0be7b6bdcb',
         '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: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.puppycrawl.tools:checkstyle:8.27:checkstyle-8.27.jar:26c81958a112ebdfc5d7b40507bbfc8f15f606fea1e55ef5675609ddb41a6053',
         'com.squareup:javapoet:1.13.0:javapoet-1.13.0.jar:4c7517e848a71b36d069d12bb3bf46a70fd4cda3105d822b0ed2e19c00b69291',
+        'commons-beanutils:commons-beanutils:1.9.4:commons-beanutils-1.9.4.jar:7d938c81789028045c08c065e94be75fc280527620d5bd62b519d5838532368a',
+        'commons-collections:commons-collections:3.2.2:commons-collections-3.2.2.jar:eeeae917917144a68a741d4c0dff66aa5c5c5fd85593ff217bced3fc8ca783b8',
+        'info.picocli:picocli:4.1.1:picocli-4.1.1.jar:9238b6af4ded57dcfedf6f7dbcf2bdf334dae2f118ea2a0bd6d05066e63ee6fc',
         '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',
@@ -23,12 +31,16 @@ dependencyVerification {
         'net.java.dev.jna:jna:4.5.2:jna-4.5.2.jar:0c8eb7acf67261656d79005191debaba3b6bf5dd60a43735a245429381dbecff',
         'net.jcip:jcip-annotations:1.0:jcip-annotations-1.0.jar:be5805392060c71474bf6c9a67a099471274d30b83eef84bfc4e0889a4f1dcc0',
         'net.ltgt.gradle.incap:incap:0.2:incap-0.2.jar:b625b9806b0f1e4bc7a2e3457119488de3cd57ea20feedd513db070a573a4ffd',
+        'net.sf.saxon:Saxon-HE:9.9.1-5:Saxon-HE-9.9.1-5.jar:4b39a9e30d5b634b5e91db5f0c6937f176d4517543ababc9b5e01830b8c56620',
+        'org.antlr:antlr4-runtime:4.7.2:antlr4-runtime-4.7.2.jar:4c518b87d4bdff8b44cd8cbc1af816e944b62a3fe5b80b781501cf1f4759bbc4',
         'org.apache-extras.beanshell:bsh:2.0b6:bsh-2.0b6.jar:a17955976070c0573235ee662f2794a78082758b61accffce8d3f8aedcd91047',
         'org.briarproject:obfs4proxy:0.0.12-dev-40245c4a:obfs4proxy-0.0.12-dev-40245c4a.zip:172029e7058b3a83ac93ac4991a44bf76e16ce8d46f558f5836d57da3cb3a766',
         'org.briarproject:tor:0.3.5.15:tor-0.3.5.15.jar:2ff5b5a3b5eaa97d699629ad24ba9584b3199d0ffdb1ea7d8a02de3016b80e7a',
         'org.checkerframework:checker-compat-qual:2.5.3:checker-compat-qual-2.5.3.jar:d76b9afea61c7c082908023f0cbc1427fab9abd2df915c8b8a3e7a509bccbc6d',
         'org.checkerframework:checker-qual:2.5.2:checker-qual-2.5.2.jar:64b02691c8b9d4e7700f8ee2e742dce7ea2c6e81e662b7522c9ee3bf568c040a',
+        'org.checkerframework:checker-qual:2.8.1:checker-qual-2.8.1.jar:9103499008bcecd4e948da29b17864abb64304e15706444ae209d17ebe0575df',
         'org.codehaus.mojo:animal-sniffer-annotations:1.17:animal-sniffer-annotations-1.17.jar:92654f493ecfec52082e76354f0ebf87648dc3d5cec2e3c3cdb947c016747a53',
+        'org.codehaus.mojo:animal-sniffer-annotations:1.18:animal-sniffer-annotations-1.18.jar:47f05852b48ee9baefef80fa3d8cea60efa4753c0013121dd7fe5eef2e5c729d',
         'org.hamcrest:hamcrest-core:2.1:hamcrest-core-2.1.jar:e09109e54a289d88506b9bfec987ddd199f4217c9464132668351b9a4f00bee9',
         'org.hamcrest:hamcrest-library:2.1:hamcrest-library-2.1.jar:b7e2b6895b3b679f0e47b6380fda391b225e9b78505db9d8bdde8d3cc8d52a21',
         'org.hamcrest:hamcrest:2.1:hamcrest-2.1.jar:ba93b2e3a562322ba432f0a1b53addcc55cb188253319a020ed77f824e692050',

briar-android/artwork/bluetooth.svg

@@ -1,15 +1,28 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
+<svg xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:cc="http://creativecommons.org/ns#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
+    xmlns="http://www.w3.org/2000/svg" xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:cc="http://creativecommons.org/ns#"
+    xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" width="500" height="175" viewBox="0 0 500 175"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+    id="svg2" version="1.1" sodipodi:docname="bluetooth.svg" inkscape:version="1.0.2 (e86c870879, 2021-01-15)">
-   xmlns:svg="http://www.w3.org/2000/svg"
+  <sodipodi:namedview
-   xmlns="http://www.w3.org/2000/svg"
+     pagecolor="#ffffff"
-   width="499.24374"
+     bordercolor="#666666"
-   height="175.49413"
+     borderopacity="1"
-   viewBox="0 0 499.24373 175.49413"
+     objecttolerance="10"
-   id="svg2"
+     gridtolerance="10"
-   version="1.1">
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1920"
+     inkscape:window-height="892"
+     id="namedview10"
+     showgrid="false"
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+		fill="#87C214" id="path26" />
+	<path
+		d="M115.938 100.312V96.6023C115.938 95.003 114.636 93.684 113.036 93.684H111.668C110.069 93.684 108.75 95.003 108.75 96.6023V100.312H115.938V100.312Z"
+		fill="#87C214" id="path28" />
+	<path
+		d="M131.931 116.305V96.6023C131.931 95.003 130.628 93.684 129.029 93.684H127.66C126.061 93.684 124.742 95.003 124.742 96.6023V116.305H131.931V116.305Z"
+		fill="#87C214" id="path30" />
+	<path
+		d="M124.742 125.801V129.511C124.742 131.11 126.061 132.429 127.66 132.429H129.029C130.628 132.429 131.947 131.11 131.947 129.511V125.801H124.742Z"
+		fill="#87C214" id="path32" />
+	<path
+		d="M107.595 117.459H103.886C102.286 117.459 100.967 118.761 100.967 120.377V121.746C100.967 123.345 102.27 124.664 103.886 124.664H107.595V117.459Z"
+		fill="#95D220" id="path34" />
+	<path
+		d="M136.795 117.459H117.092V124.664H136.795C138.394 124.664 139.713 123.345 139.713 121.746V120.377C139.713 118.761 138.394 117.459 136.795 117.459Z"
+		fill="#95D220" id="path36" />
+	<path
+		d="M123.588 101.466H103.886C102.286 101.466 100.967 102.769 100.967 104.385V105.753C100.967 107.352 102.27 108.671 103.886 108.671H123.588V101.466Z"
+		fill="#95D220" id="path38" />
+	<path
+		d="M136.795 101.466H133.085V108.671H136.795C138.394 108.671 139.713 107.369 139.713 105.753V104.384C139.713 102.769 138.394 101.466 136.795 101.466Z"
+		fill="#95D220" id="path40" />
+</svg>

briar-android/build.gradle

@@ -1,4 +1,5 @@
 apply plugin: 'com.android.application'
+apply plugin: 'checkstyle'
 apply plugin: 'witness'
 apply from: 'witness.gradle'
 
@@ -26,8 +27,8 @@ android {
 	defaultConfig {
 		minSdkVersion 16
 		targetSdkVersion 30
-		versionCode 10306
+		versionCode 10401
-		versionName "1.3.6"
+		versionName "1.4.1"
 		applicationId "org.briarproject.briar.android"
 
 		vectorDrawables.useSupportLibrary = true
@@ -110,7 +111,7 @@ dependencies {
 
 	implementation 'info.guardianproject.panic:panic:1.0'
 	implementation 'info.guardianproject.trustedintents:trustedintents:0.2'
-	implementation 'de.hdodenhof:circleimageview:3.0.1'
+	implementation 'de.hdodenhof:circleimageview:3.1.0'
 	implementation 'com.google.zxing:core:3.3.3'  // newer version need minSdk 24
 	implementation 'uk.co.samuelwall:material-tap-target-prompt:3.3.0'
 	implementation 'com.vanniktech:emoji-google:0.6.0' // newer versions need minSdk 21
@@ -121,6 +122,7 @@ dependencies {
 		exclude group: 'com.android.support'
 		exclude module: 'disklrucache' // when there's no disk cache, we can't accidentally use it
 	}
+	implementation 'org.nanohttpd:nanohttpd:2.3.1'
 
 	annotationProcessor "com.google.dagger:dagger-compiler:$dagger_version"
 	annotationProcessor "com.github.bumptech.glide:compiler:$glideVersion"

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

@@ -3,6 +3,7 @@ package org.briarproject.briar.android;
 import org.briarproject.bramble.BrambleAndroidModule;
 import org.briarproject.bramble.BrambleCoreModule;
 import org.briarproject.bramble.account.BriarAccountModule;
+import org.briarproject.bramble.plugin.file.RemovableDriveModule;
 import org.briarproject.bramble.system.ClockModule;
 import org.briarproject.briar.BriarCoreModule;
 import org.briarproject.briar.android.attachment.AttachmentModule;
@@ -20,6 +21,7 @@ import dagger.Component;
 		AttachmentModule.class,
 		ClockModule.class,
 		MediaModule.class,
+		RemovableDriveModule.class,
 		BriarCoreModule.class,
 		BrambleAndroidModule.class,
 		BriarAccountModule.class,

briar-android/src/main/AndroidManifest.xml

@@ -18,6 +18,7 @@
 
 	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 	<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+	<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
 	<uses-permission android:name="android.permission.BLUETOOTH" />
 	<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
 	<uses-permission android:name="android.permission.CAMERA" />
@@ -456,6 +457,22 @@
 			android:label="@string/pending_contact_requests"
 			android:theme="@style/BriarTheme" />
 
+		<activity
+			android:name=".android.hotspot.HotspotActivity"
+			android:label="@string/hotspot_title"
+			android:theme="@style/BriarTheme" />
+
+		<activity
+			android:name=".android.contact.connect.ConnectViaBluetoothActivity"
+			android:exported="false"
+			android:label="@string/connect_via_bluetooth_title"
+			android:parentActivityName="org.briarproject.briar.android.conversation.ConversationActivity"
+			android:theme="@style/BriarTheme">
+			<meta-data
+				android:name="android.support.PARENT_ACTIVITY"
+				android:value="org.briarproject.briar.android.conversation.ConversationActivity" />
+		</activity>
+
 	</application>
 
 	<queries>

briar-android/src/main/assets/hotspot.html

@@ -0,0 +1,103 @@
+<html>
+<head>
+    <meta content="text/html;charset=utf-8" http-equiv="Content-Type">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <style>
+        body {
+            background-color: #F2F2F2;
+            font-family: Roboto,Arial,Helvetica,sans-serif;
+            font-size: 14px;
+            margin: 0;
+            height: 100%;
+        }
+        div#top {
+            background-color: #FFFFFF;
+            padding: 16px;
+        }
+        div#bottom {
+            padding: 16px 32px;
+            margin-top: 12px;
+        }
+        a.button {
+            background-color: #82C91E;
+            width: 100%;
+            display: block;
+            box-sizing: border-box;
+            padding: 12px 32px !important;
+            border: 1px solid transparent;
+            border-radius: 2px;
+            color: #000000 !important;
+            cursor: pointer;
+            font-weight: 500;
+            text-decoration: none;
+            text-transform: uppercase;
+            text-align: center;
+            margin: 20px auto 20px auto;
+        }
+        ol {
+            list-style: none;
+            counter-reset: briar-counter;
+            padding-left: 40px;
+        }
+        ol li {
+            counter-increment: briar-counter;
+            margin-bottom: 2em;
+        }
+        ol li::before {
+            content: counter(briar-counter);
+            background-color: #82C91E;
+            color: #000000 !important;
+            font-weight: bold;
+            border-radius: 70px;
+            width: 24px;
+            height: 24px;
+            line-height: 24px;
+            text-align: center;
+            position: absolute;
+            left: 32px;
+        }
+
+    </style>
+</head>
+<body>
+
+<div id="top">
+    <svg style="width:156px;height:47px;" viewBox="0 0 778 235">
+        <path style="fill:#87c214"
+              d="m 64.900391,0 c -9.7,0 -17.701172,7.9992183 -17.701172,17.699219 v 22.5 h 43.601562 v -22.5 C 90.800781,7.9992183 82.899219,0 73.199219,0 Z m 96.999999,0 c -9.7,0 -17.70117,7.9992183 -17.70117,17.699219 V 137.19922 h 43.60156 V 17.699219 C 187.80078,7.9992183 179.89922,0 170.19922,0 Z M 47.199219,97.800781 V 217.30078 c 0,9.7 7.901172,17.69922 17.701172,17.69922 h 8.298828 c 9.7,0 17.701172,-7.99922 17.701172,-17.69922 V 97.800781 Z m 97.000001,96.999999 v 22.5 c 0,9.7 8.00117,17.69922 17.70117,17.69922 h 8.29883 c 9.7,0 17.70117,-7.99922 17.70117,-17.69922 v -22.5 z"/>
+        <path style="fill:#95d220"
+              d="M 17.699219,47.199219 C 7.9992186,47.199219 0,55.100391 0,64.900391 v 8.298828 c 0,9.7 7.8992186,17.701172 17.699219,17.701172 H 137.19922 V 47.199219 Z m 177.101561,0 v 43.701172 h 22.5 c 9.7,0 17.69922,-7.901172 17.69922,-17.701172 v -8.298828 c 0,-9.8 -7.99922,-17.701172 -17.69922,-17.701172 z M 17.699219,144.19922 C 7.9992186,144.19922 0,152.10039 0,161.90039 v 8.29883 c 0,9.7 7.8992186,17.70117 17.699219,17.70117 h 22.5 v -43.70117 z m 80.101562,0 v 43.70117 H 217.30078 c 9.7,0 17.69922,-8.00117 17.69922,-17.70117 v -8.29883 c 0,-9.8 -7.99922,-17.70117 -17.69922,-17.70117 z"/>
+        <path d="M 301,60.564864 V 174.43514 h 53.31362 c 25.13729,0 38.31622,-12.58548 38.31622,-32.27441 0,-12.78766 -5.88,-22.32687 -17.63776,-27.60431 v -0.20217 c 8.91968,-5.48043 12.77339,-12.38249 12.77339,-23.140374 0,-16.238294 -11.14945,-30.648991 -34.66495,-30.648991 z m 110.68683,0 V 174.43514 h 13.37598 v -45.67022 l -1.41529,-1.41926 h 26.95811 c 15.00127,0 23.51842,5.27428 28.99185,17.04704 l 14.1887,30.04244 h 15.00139 l -16.82503,-35.52128 c -3.64896,-7.91617 -9.52848,-12.99064 -14.79921,-15.22341 v -0.20216 c 12.36593,-3.24765 22.70429,-14.41228 22.70429,-29.229734 0,-22.530633 -17.43208,-33.693671 -38.31224,-33.693671 z m 111.08726,0 V 174.43514 h 13.37992 V 60.564864 Z m 78.65821,0 -50.07469,113.870276 h 14.59701 l 12.16287,-27.40213 -0.60656,-1.41926 h 62.2336 l -0.60655,1.41926 12.16286,27.40213 h 14.59701 L 615.62098,60.564864 Z m 79.463,0 V 174.43514 h 13.37994 v -45.67022 l -1.41927,-1.41926 h 26.96209 c 15.00128,0 23.51842,5.27428 28.99185,17.04704 l 14.1887,30.04244 H 778 l -16.82503,-35.52128 c -3.64895,-7.91617 -9.52851,-12.99064 -14.79921,-15.22341 v -0.20216 c 12.36591,-3.24765 22.70427,-14.41228 22.70427,-29.229734 0,-22.530633 -17.43209,-33.693671 -38.31223,-33.693671 z M 312.96068,73.147961 h 38.72057 c 14.59584,0 22.29593,5.887175 22.29593,18.065895 0,10.148944 -6.07834,18.268094 -22.29593,18.268094 h -38.72057 l 1.41927,-1.41927 V 74.571187 Z m 110.68684,0 h 37.90786 c 13.78495,0 24.32519,5.684988 24.52791,20.908395 0,12.178724 -9.52687,20.702244 -25.94718,20.702244 h -36.48859 l 1.41529,-1.41927 V 74.571187 Z m 269.00626,0 h 37.90788 c 13.98769,0 24.53187,5.684988 24.53187,20.908395 0,12.178724 -9.52688,20.702244 -25.94718,20.702244 h -36.49257 l 1.41927,-1.41927 V 74.571187 Z m -83.92693,1.423226 h 0.20615 l 3.44509,11.366019 20.06794,45.670224 1.41924,1.41926 h -50.07071 l 1.41926,-1.41926 20.06793,-45.670224 z M 312.96068,122.06505 h 41.35294 c 16.82575,0 24.53189,7.71398 24.53189,20.09568 0,12.58468 -7.09797,19.69131 -24.53189,19.69131 h -41.35294 l 1.41927,-1.42322 v -36.94055 z"/>
+    </svg>
+
+    <h2 id="download_title">Download Briar 1.2.20</h2>
+
+    <span id="download_intro">Someone nearby shared Briar with you.</span>
+
+    <a href="/app.apk" class="button">
+        <svg aria-hidden="true"
+             style="width:24px;height:24px;margin-right:6px;vertical-align:middle;"
+             viewBox="0 0 24 24">
+            <path fill="currentColor" d="M5,20H19V18H5M19,9H15V3H9V9H5L12,16L19,9Z"/>
+        </svg>
+        <span id="download_button">Download Briar</span>
+    </a>
+
+    <span id="download_outro">After the download is complete, open the downloaded file and install it.</span>
+</div>
+
+<div id="bottom">
+    <h3 id="troubleshooting_title">Troubleshooting</h3>
+    <ol>
+        <li id="troubleshooting_1">If you can't download the app, try it with a different web
+            browser app.
+        </li>
+        <li id="troubleshooting_2">To install the downloaded app,
+            you might need to allow your browser to install unknown apps.
+            We recommend to undo that after successful installation.
+        </li>
+    </ol>
+</div>
+
+</body>
+</html>

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

@@ -35,7 +35,13 @@ import org.briarproject.briar.BriarCoreEagerSingletons;
 import org.briarproject.briar.BriarCoreModule;
 import org.briarproject.briar.android.attachment.AttachmentModule;
 import org.briarproject.briar.android.attachment.media.MediaModule;
+import org.briarproject.briar.android.contact.connect.BluetoothIntroFragment;
 import org.briarproject.briar.android.conversation.glide.BriarModelLoader;
+import org.briarproject.briar.android.hotspot.AbstractTabsFragment;
+import org.briarproject.briar.android.hotspot.FallbackFragment;
+import org.briarproject.briar.android.hotspot.HotspotIntroFragment;
+import org.briarproject.briar.android.hotspot.ManualHotspotFragment;
+import org.briarproject.briar.android.hotspot.QrHotspotFragment;
 import org.briarproject.briar.android.logging.CachingLogHandler;
 import org.briarproject.briar.android.login.SignInReminderReceiver;
 import org.briarproject.briar.android.removabledrive.ChooserFragment;
@@ -216,9 +222,21 @@ public interface AndroidComponent
 
 	void inject(NotificationsFragment notificationsFragment);
 
+	void inject(HotspotIntroFragment hotspotIntroFragment);
+
+	void inject(AbstractTabsFragment abstractTabsFragment);
+
+	void inject(QrHotspotFragment qrHotspotFragment);
+
+	void inject(ManualHotspotFragment manualHotspotFragment);
+
+	void inject(FallbackFragment fallbackFragment);
+
 	void inject(ChooserFragment chooserFragment);
 
 	void inject(SendFragment sendFragment);
 
 	void inject(ReceiveFragment receiveFragment);
+
+	void inject(BluetoothIntroFragment bluetoothIntroFragment);
 }

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

@@ -30,6 +30,7 @@ import org.briarproject.bramble.util.StringUtils;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.conversation.ConversationActivity;
 import org.briarproject.briar.android.forum.ForumActivity;
+import org.briarproject.briar.android.hotspot.HotspotActivity;
 import org.briarproject.briar.android.login.SignInReminderReceiver;
 import org.briarproject.briar.android.navdrawer.NavDrawerActivity;
 import org.briarproject.briar.android.privategroup.conversation.GroupActivity;
@@ -63,9 +64,11 @@ import static android.app.Notification.DEFAULT_SOUND;
 import static android.app.Notification.DEFAULT_VIBRATE;
 import static android.app.NotificationManager.IMPORTANCE_DEFAULT;
 import static android.app.NotificationManager.IMPORTANCE_LOW;
+import static android.app.PendingIntent.getActivity;
 import static android.content.Context.NOTIFICATION_SERVICE;
 import static android.content.Intent.FLAG_ACTIVITY_CLEAR_TOP;
 import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
+import static android.content.Intent.FLAG_ACTIVITY_SINGLE_TOP;
 import static android.os.Build.VERSION.SDK_INT;
 import static androidx.core.app.NotificationCompat.CATEGORY_MESSAGE;
 import static androidx.core.app.NotificationCompat.CATEGORY_SERVICE;
@@ -274,7 +277,7 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 		b.setWhen(0); // Don't show the time
 		b.setOngoing(true);
 		Intent i = new Intent(appContext, SplashScreenActivity.class);
-		b.setContentIntent(PendingIntent.getActivity(appContext, 0, i, 0));
+		b.setContentIntent(getActivity(appContext, 0, i, 0));
 		if (SDK_INT >= 21) {
 			b.setCategory(CATEGORY_SERVICE);
 			b.setVisibility(VISIBILITY_SECRET);
@@ -619,13 +622,11 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 	public void showSignInNotification() {
 		if (blockSignInReminder) return;
 		if (SDK_INT >= 26) {
-			NotificationChannel channel =
+			NotificationChannel channel = new NotificationChannel(
-					new NotificationChannel(REMINDER_CHANNEL_ID, appContext
+					REMINDER_CHANNEL_ID, appContext
-							.getString(
+					.getString(R.string.reminder_notification_channel_title),
-									R.string.reminder_notification_channel_title),
+					IMPORTANCE_LOW);
-							IMPORTANCE_LOW);
+			channel.setLockscreenVisibility(VISIBILITY_SECRET);
-			channel.setLockscreenVisibility(
-					NotificationCompat.VISIBILITY_SECRET);
 			notificationManager.createNotificationChannel(channel);
 		}
 
@@ -652,7 +653,7 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 
 		Intent i = new Intent(appContext, SplashScreenActivity.class);
 		i.setFlags(FLAG_ACTIVITY_NEW_TASK | FLAG_ACTIVITY_CLEAR_TOP);
-		b.setContentIntent(PendingIntent.getActivity(appContext, 0, i, 0));
+		b.setContentIntent(getActivity(appContext, 0, i, 0));
 
 		notificationManager.notify(REMINDER_NOTIFICATION_ID, b.build());
 	}
@@ -720,4 +721,40 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 	public void unblockAllBlogPostNotifications() {
 		androidExecutor.runOnUiThread((Runnable) () -> blockBlogs = false);
 	}
+
+	@Override
+	public void showHotspotNotification() {
+		if (SDK_INT >= 26) {
+			String channelTitle = appContext
+					.getString(R.string.hotspot_notification_channel_title);
+			NotificationChannel channel = new NotificationChannel(
+					HOTSPOT_CHANNEL_ID, channelTitle, IMPORTANCE_LOW);
+			channel.setLockscreenVisibility(VISIBILITY_SECRET);
+			notificationManager.createNotificationChannel(channel);
+		}
+		BriarNotificationBuilder b =
+				new BriarNotificationBuilder(appContext, HOTSPOT_CHANNEL_ID);
+		b.setSmallIcon(R.drawable.notification_hotspot);
+		b.setColorRes(R.color.briar_brand_green);
+		b.setContentTitle(
+				appContext.getText(R.string.hotspot_notification_title));
+		b.setNotificationCategory(CATEGORY_SERVICE);
+		b.setOngoing(true);
+		b.setShowWhen(true);
+
+		String actionTitle =
+				appContext.getString(R.string.hotspot_button_stop_sharing);
+		Intent i = new Intent(appContext, HotspotActivity.class);
+		i.addFlags(FLAG_ACTIVITY_SINGLE_TOP);
+		i.setAction(ACTION_STOP_HOTSPOT);
+		PendingIntent actionIntent = getActivity(appContext, 0, i, 0);
+		int icon = SDK_INT >= 21 ? R.drawable.ic_portable_wifi_off : 0;
+		b.addAction(icon, actionTitle, actionIntent);
+		notificationManager.notify(HOTSPOT_NOTIFICATION_ID, b.build());
+	}
+
+	@Override
+	public void clearHotspotNotification() {
+		notificationManager.cancel(HOTSPOT_NOTIFICATION_ID);
+	}
 }

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

@@ -18,7 +18,9 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.BluetoothConstants;
 import org.briarproject.bramble.api.plugin.LanTcpConstants;
 import org.briarproject.bramble.api.plugin.PluginConfig;
+import org.briarproject.bramble.api.plugin.TorControlPort;
 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.DuplexPluginFactory;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
@@ -35,7 +37,9 @@ import org.briarproject.briar.android.account.SetupModule;
 import org.briarproject.briar.android.blog.BlogModule;
 import org.briarproject.briar.android.contact.ContactListModule;
 import org.briarproject.briar.android.contact.add.nearby.AddNearbyContactModule;
+import org.briarproject.briar.android.contact.connect.ConnectViaBluetoothModule;
 import org.briarproject.briar.android.forum.ForumModule;
+import org.briarproject.briar.android.hotspot.HotspotModule;
 import org.briarproject.briar.android.introduction.IntroductionModule;
 import org.briarproject.briar.android.logging.LoggingModule;
 import org.briarproject.briar.android.login.LoginModule;
@@ -72,6 +76,8 @@ import static java.util.Arrays.asList;
 import static java.util.Collections.emptyList;
 import static java.util.Collections.singletonList;
 import static java.util.Collections.singletonMap;
+import static org.briarproject.bramble.api.plugin.TorConstants.DEFAULT_CONTROL_PORT;
+import static org.briarproject.bramble.api.plugin.TorConstants.DEFAULT_SOCKS_PORT;
 import static org.briarproject.bramble.api.reporting.ReportingConstants.DEV_ONION_ADDRESS;
 import static org.briarproject.bramble.api.reporting.ReportingConstants.DEV_PUBLIC_KEY_HEX;
 import static org.briarproject.briar.android.TestingConstants.IS_DEBUG_BUILD;
@@ -88,12 +94,14 @@ import static org.briarproject.briar.android.TestingConstants.IS_DEBUG_BUILD;
 		DevReportModule.class,
 		ContactListModule.class,
 		IntroductionModule.class,
+		ConnectViaBluetoothModule.class,
 		// below need to be within same scope as ViewModelProvider.Factory
 		BlogModule.class,
 		ForumModule.class,
 		GroupListModule.class,
 		GroupConversationModule.class,
 		SharingModule.class,
+		HotspotModule.class,
 		TransferDataModule.class,
 })
 public class AppModule {
@@ -151,6 +159,28 @@ public class AppModule {
 		return app.getDir("tor", MODE_PRIVATE);
 	}
 
+	@Provides
+	@Singleton
+	@TorSocksPort
+	int provideTorSocksPort() {
+		if (!IS_DEBUG_BUILD) {
+			return DEFAULT_SOCKS_PORT;
+		} else {
+			return DEFAULT_SOCKS_PORT + 2;
+		}
+	}
+
+	@Provides
+	@Singleton
+	@TorControlPort
+	int provideTorControlPort() {
+		if (!IS_DEBUG_BUILD) {
+			return DEFAULT_CONTROL_PORT;
+		} else {
+			return DEFAULT_CONTROL_PORT + 2;
+		}
+	}
+
 	@Provides
 	@Singleton
 	PluginConfig providePluginConfig(AndroidBluetoothPluginFactory bluetooth,
@@ -167,11 +197,8 @@ public class AppModule {
 
 			@Override
 			public Collection<SimplexPluginFactory> getSimplexFactories() {
-				if (SDK_INT >= 19 && featureFlags.shouldEnableTransferData()) {
+				if (SDK_INT >= 19) return singletonList(drive);
-					return singletonList(drive);
+				else return emptyList();
-				} else {
-					return emptyList();
-				}
 			}
 
 			@Override
@@ -308,16 +335,6 @@ public class AppModule {
 			public boolean shouldEnableDisappearingMessages() {
 				return true;
 			}
-
-			@Override
-			public boolean shouldEnableConnectViaBluetooth() {
-				return IS_DEBUG_BUILD;
-			}
-
-			@Override
-			public boolean shouldEnableTransferData() {
-				return IS_DEBUG_BUILD;
-			}
 		};
 	}
 }

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

@@ -28,8 +28,8 @@ import org.briarproject.briar.android.contact.add.remote.AddContactActivity;
 import org.briarproject.briar.android.contact.add.remote.LinkExchangeFragment;
 import org.briarproject.briar.android.contact.add.remote.NicknameFragment;
 import org.briarproject.briar.android.contact.add.remote.PendingContactListActivity;
+import org.briarproject.briar.android.contact.connect.ConnectViaBluetoothActivity;
 import org.briarproject.briar.android.conversation.AliasDialogFragment;
-import org.briarproject.briar.android.conversation.BluetoothConnecterDialogFragment;
 import org.briarproject.briar.android.conversation.ConversationActivity;
 import org.briarproject.briar.android.conversation.ConversationSettingsDialog;
 import org.briarproject.briar.android.conversation.ImageActivity;
@@ -38,6 +38,7 @@ import org.briarproject.briar.android.forum.CreateForumActivity;
 import org.briarproject.briar.android.forum.ForumActivity;
 import org.briarproject.briar.android.forum.ForumListFragment;
 import org.briarproject.briar.android.fragment.ScreenFilterDialogFragment;
+import org.briarproject.briar.android.hotspot.HotspotActivity;
 import org.briarproject.briar.android.introduction.ContactChooserFragment;
 import org.briarproject.briar.android.introduction.IntroductionActivity;
 import org.briarproject.briar.android.introduction.IntroductionMessageFragment;
@@ -177,6 +178,8 @@ public interface ActivityComponent {
 
 	void inject(CrashReportActivity crashReportActivity);
 
+	void inject(HotspotActivity hotspotActivity);
+
 	void inject(RemovableDriveActivity activity);
 
 	// Fragments
@@ -235,9 +238,6 @@ public interface ActivityComponent {
 
 	void inject(ConversationSettingsDialog dialog);
 
-	void inject(
-			BluetoothConnecterDialogFragment bluetoothConnecterDialogFragment);
-
 	void inject(RssFeedImportFragment fragment);
 
 	void inject(RssFeedManageFragment fragment);
@@ -245,4 +245,6 @@ public interface ActivityComponent {
 	void inject(RssFeedImportFailedDialogFragment fragment);
 
 	void inject(RssFeedDeleteFeedDialogFragment fragment);
+
+	void inject(ConnectViaBluetoothActivity connectViaBluetoothActivity);
 }

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

@@ -46,6 +46,7 @@ import static java.util.logging.Level.INFO;
 import static java.util.logging.Logger.getLogger;
 import static org.briarproject.briar.android.TestingConstants.PREVENT_SCREENSHOTS;
 import static org.briarproject.briar.android.util.UiUtils.hideSoftKeyboard;
+import static org.briarproject.briar.android.util.UiUtils.showFragment;
 
 /**
  * Warning: Some activities don't extend {@link BaseActivity}.
@@ -177,13 +178,7 @@ public abstract class BaseActivity extends AppCompatActivity
 
 	public void showNextFragment(BaseFragment f) {
 		if (!getLifecycle().getCurrentState().isAtLeast(STARTED)) return;
-		getSupportFragmentManager().beginTransaction()
+		showFragment(getSupportFragmentManager(), f, f.getUniqueTag());
-				.setCustomAnimations(R.anim.step_next_in,
-						R.anim.step_previous_out, R.anim.step_previous_in,
-						R.anim.step_next_out)
-				.replace(R.id.fragmentContainer, f, f.getUniqueTag())
-				.addToBackStack(f.getUniqueTag())
-				.commit();
 	}
 
 	protected boolean isFragmentAdded(String fragmentTag) {

briar-android/src/main/java/org/briarproject/briar/android/blog/BlogPostItem.java

@@ -1,10 +1,10 @@
 package org.briarproject.briar.android.blog;
 
 import org.briarproject.bramble.api.identity.Author;
-import org.briarproject.briar.api.identity.AuthorInfo;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.briar.api.blog.BlogPostHeader;
+import org.briarproject.briar.api.identity.AuthorInfo;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.NotThreadSafe;
@@ -50,7 +50,7 @@ public class BlogPostItem implements Comparable<BlogPostItem> {
 		return text;
 	}
 
-	public boolean isRssFeed() {
+	boolean isRssFeed() {
 		return header.isRssFeed();
 	}
 

briar-android/src/main/java/org/briarproject/briar/android/blog/BlogPostViewHolder.java

@@ -20,6 +20,7 @@ import androidx.annotation.UiThread;
 import androidx.core.view.ViewCompat;
 import androidx.recyclerview.widget.RecyclerView;
 
+import static android.os.Build.VERSION.SDK_INT;
 import static android.view.View.GONE;
 import static android.view.View.VISIBLE;
 import static org.briarproject.briar.android.activity.BriarActivity.GROUP_ID;
@@ -44,6 +45,7 @@ class BlogPostViewHolder extends RecyclerView.ViewHolder {
 	private final TextView text;
 	private final ViewGroup commentContainer;
 	private final boolean fullText, authorClickable;
+	private final int padding;
 
 	private final OnBlogPostClickListener listener;
 
@@ -61,6 +63,8 @@ class BlogPostViewHolder extends RecyclerView.ViewHolder {
 		reblogButton = v.findViewById(R.id.commentView);
 		text = v.findViewById(R.id.textView);
 		commentContainer = v.findViewById(R.id.commentContainer);
+		padding = ctx.getResources()
+				.getDimensionPixelSize(R.dimen.listitem_vertical_margin);
 	}
 
 	void hideReblogButton() {
@@ -129,6 +133,12 @@ class BlogPostViewHolder extends RecyclerView.ViewHolder {
 		} else {
 			reblogger.setVisibility(GONE);
 		}
+
+		// Apply Android 4 padding fix after setting up author/reblogger views
+		if (SDK_INT < 21) {
+			reblogger.setPadding(padding, padding, padding, padding);
+			author.setPadding(padding, padding, padding, padding);
+		}
 	}
 
 	private void onBindComment(BlogCommentItem item, boolean authorClickable) {

briar-android/src/main/java/org/briarproject/briar/android/blog/RssFeedActivity.java

@@ -57,8 +57,12 @@ public class RssFeedActivity extends BriarActivity
 				onBackPressed();
 			}
 		} else if (result == FAILED) {
+			String url = viewModel.getUrlFailedImport();
+			if (url == null) {
+				throw new AssertionError();
+			}
 			RssFeedImportFailedDialogFragment dialog =
-					RssFeedImportFailedDialogFragment.newInstance();
+					RssFeedImportFailedDialogFragment.newInstance(url);
 			dialog.show(getSupportFragmentManager(),
 					RssFeedImportFailedDialogFragment.TAG);
 		} else if (result == EXISTS) {

briar-android/src/main/java/org/briarproject/briar/android/blog/RssFeedImportFailedDialogFragment.java

@@ -25,8 +25,15 @@ public class RssFeedImportFailedDialogFragment extends DialogFragment {
 	ViewModelProvider.Factory viewModelFactory;
 	private RssFeedViewModel viewModel;
 
-	static RssFeedImportFailedDialogFragment newInstance() {
+	private static final String ARG_URL = "url";
-		return new RssFeedImportFailedDialogFragment();
+
+	static RssFeedImportFailedDialogFragment newInstance(String retryUrl) {
+		Bundle args = new Bundle();
+		args.putString(ARG_URL, retryUrl);
+		RssFeedImportFailedDialogFragment f =
+				new RssFeedImportFailedDialogFragment();
+		f.setArguments(args);
+		return f;
 	}
 
 	@Override
@@ -45,8 +52,8 @@ public class RssFeedImportFailedDialogFragment extends DialogFragment {
 						R.style.BriarDialogTheme);
 		builder.setMessage(R.string.blogs_rss_feeds_import_error);
 		builder.setNegativeButton(R.string.cancel, null);
-		builder.setPositiveButton(R.string.try_again_button,
+		builder.setPositiveButton(R.string.try_again_button, (dialog, which) ->
-				(dialog, which) -> viewModel.retryImportFeed());
+				viewModel.importFeed(requireArguments().getString(ARG_URL)));
 
 		return builder.create();
 	}

briar-android/src/main/java/org/briarproject/briar/android/blog/RssFeedManageFragment.java

@@ -20,7 +20,6 @@ import org.briarproject.briar.api.feed.Feed;
 import javax.annotation.Nullable;
 import javax.inject.Inject;
 
-import androidx.annotation.NonNull;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.recyclerview.widget.LinearLayoutManager;
 

briar-android/src/main/java/org/briarproject/briar/android/blog/RssFeedViewModel.java

@@ -159,11 +159,9 @@ class RssFeedViewModel extends DbViewModel {
 		});
 	}
 
-	void retryImportFeed() {
+	@Nullable
-		if (urlFailedImport == null) {
+	String getUrlFailedImport() {
-			throw new AssertionError();
+		return urlFailedImport;
-		}
-		importFeed(urlFailedImport);
 	}
 
 	private boolean exists(String url) {

briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/AddNearbyContactViewModel.java

@@ -53,6 +53,7 @@ import org.briarproject.briar.android.contact.add.nearby.AddContactState.Contact
 import org.briarproject.briar.android.contact.add.nearby.AddContactState.KeyAgreementListening;
 import org.briarproject.briar.android.contact.add.nearby.AddContactState.KeyAgreementStarted;
 import org.briarproject.briar.android.contact.add.nearby.AddContactState.KeyAgreementWaiting;
+import org.briarproject.briar.android.util.QrCodeUtils;
 import org.briarproject.briar.android.viewmodel.LiveEvent;
 import org.briarproject.briar.android.viewmodel.MutableLiveEvent;
 

briar-android/src/main/java/org/briarproject/briar/android/contact/add/remote/LinkExchangeFragment.java

@@ -59,7 +59,7 @@ public class LinkExchangeFragment extends BaseFragment
 	@Override
 	public void injectFragment(ActivityComponent component) {
 		component.inject(this);
-		viewModel = new ViewModelProvider(getActivity(), viewModelFactory)
+		viewModel = new ViewModelProvider(requireActivity(), viewModelFactory)
 				.get(AddContactViewModel.class);
 	}
 

briar-android/src/main/java/org/briarproject/briar/android/contact/connect/BluetoothConditionManager.java

@@ -0,0 +1,87 @@
+package org.briarproject.briar.android.contact.connect;
+
+import android.app.Activity;
+import android.content.Context;
+
+import org.briarproject.briar.R;
+
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.annotation.Nullable;
+import androidx.annotation.UiThread;
+import androidx.appcompat.app.AlertDialog;
+
+import static android.Manifest.permission.ACCESS_FINE_LOCATION;
+import static android.os.Build.VERSION.SDK_INT;
+import static androidx.core.app.ActivityCompat.shouldShowRequestPermissionRationale;
+import static org.briarproject.briar.android.util.UiUtils.getGoToSettingsListener;
+import static org.briarproject.briar.android.util.UiUtils.isLocationEnabled;
+import static org.briarproject.briar.android.util.UiUtils.showLocationDialog;
+
+class BluetoothConditionManager {
+
+	private enum Permission {
+		UNKNOWN, GRANTED, SHOW_RATIONALE, PERMANENTLY_DENIED
+	}
+
+	private Permission locationPermission = Permission.UNKNOWN;
+
+	/**
+	 * Call this when the using activity or fragment starts,
+	 * because permissions might have changed while it was stopped.
+	 */
+	void reset() {
+		locationPermission = Permission.UNKNOWN;
+	}
+
+	@UiThread
+	void onLocationPermissionResult(Activity activity,
+			@Nullable Boolean result) {
+		if (result != null && result) {
+			locationPermission = Permission.GRANTED;
+		} else if (shouldShowRequestPermissionRationale(activity,
+				ACCESS_FINE_LOCATION)) {
+			locationPermission = Permission.SHOW_RATIONALE;
+		} else {
+			locationPermission = Permission.PERMANENTLY_DENIED;
+		}
+	}
+
+	boolean areRequirementsFulfilled(Context ctx,
+			ActivityResultLauncher<String> permissionRequest,
+			Runnable onLocationDenied) {
+		boolean permissionGranted =
+				SDK_INT < 23 || locationPermission == Permission.GRANTED;
+		boolean locationEnabled = isLocationEnabled(ctx);
+		if (permissionGranted && locationEnabled) return true;
+
+		if (locationPermission == Permission.PERMANENTLY_DENIED) {
+			showDenialDialog(ctx, onLocationDenied);
+		} else if (locationPermission == Permission.SHOW_RATIONALE) {
+			showRationale(ctx, permissionRequest);
+		} else if (!locationEnabled) {
+			showLocationDialog(ctx);
+		}
+		return false;
+	}
+
+	private void showDenialDialog(Context ctx, Runnable onLocationDenied) {
+		new AlertDialog.Builder(ctx, R.style.BriarDialogTheme)
+				.setTitle(R.string.permission_location_title)
+				.setMessage(R.string.permission_location_denied_body)
+				.setPositiveButton(R.string.ok, getGoToSettingsListener(ctx))
+				.setNegativeButton(R.string.cancel, (v, d) ->
+						onLocationDenied.run())
+				.show();
+	}
+
+	private void showRationale(Context ctx,
+			ActivityResultLauncher<String> permissionRequest) {
+		new AlertDialog.Builder(ctx, R.style.BriarDialogTheme)
+				.setTitle(R.string.permission_location_title)
+				.setMessage(R.string.permission_location_request_body)
+				.setPositiveButton(R.string.ok, (dialog, which) ->
+						permissionRequest.launch(ACCESS_FINE_LOCATION))
+				.show();
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/contact/connect/BluetoothIntroFragment.java

@@ -0,0 +1,109 @@
+package org.briarproject.briar.android.contact.connect;
+
+import android.app.Activity;
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.Toast;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.util.ActivityLaunchers.RequestBluetoothDiscoverable;
+
+import javax.inject.Inject;
+
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.contract.ActivityResultContracts.RequestPermission;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.ViewModelProvider;
+
+import static android.Manifest.permission.ACCESS_FINE_LOCATION;
+import static android.widget.Toast.LENGTH_LONG;
+import static org.briarproject.briar.android.AppModule.getAndroidComponent;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class BluetoothIntroFragment extends Fragment {
+
+	final static String TAG = BluetoothIntroFragment.class.getName();
+
+	@Inject
+	ViewModelProvider.Factory viewModelFactory;
+
+	private final BluetoothConditionManager conditionManager =
+			new BluetoothConditionManager();
+	private ConnectViaBluetoothViewModel viewModel;
+
+	private final ActivityResultLauncher<Integer> bluetoothDiscoverableRequest =
+			registerForActivityResult(new RequestBluetoothDiscoverable(),
+					this::onBluetoothDiscoverable);
+	private final ActivityResultLauncher<String> permissionRequest =
+			registerForActivityResult(new RequestPermission(),
+					this::onPermissionRequestResult);
+
+	@Override
+	public void onAttach(Context context) {
+		super.onAttach(context);
+		getAndroidComponent(requireContext()).inject(this);
+		viewModel = new ViewModelProvider(requireActivity(), viewModelFactory)
+				.get(ConnectViaBluetoothViewModel.class);
+	}
+
+	@Override
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		return inflater
+				.inflate(R.layout.fragment_bluetooth_intro, container, false);
+	}
+
+	@Override
+	public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
+		Button startButton = view.findViewById(R.id.startButton);
+		startButton.setOnClickListener(this::onStartClicked);
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		conditionManager.reset();
+	}
+
+	private void onStartClicked(View v) {
+		if (viewModel.shouldStartFlow()) {
+			// The dialog starts a permission request which comes back as true
+			// if the permission is already granted.
+			// So we can use the request as a generic entry point
+			// to the whole flow.
+			permissionRequest.launch(ACCESS_FINE_LOCATION);
+		}
+	}
+
+	private void onPermissionRequestResult(@Nullable Boolean result) {
+		Activity a = requireActivity();
+		// update permission result in BluetoothConnecter
+		conditionManager.onLocationPermissionResult(a, result);
+		// what to do when the user denies granting the location permission
+		Runnable onLocationPermissionDenied = () -> Toast.makeText(
+				requireContext(),
+				R.string.connect_via_bluetooth_no_location_permission,
+				LENGTH_LONG).show();
+		// if requirements are fulfilled, request Bluetooth discoverability
+		if (conditionManager.areRequirementsFulfilled(a, permissionRequest,
+				onLocationPermissionDenied)) {
+			bluetoothDiscoverableRequest.launch(120); // for 2min
+		}
+	}
+
+	private void onBluetoothDiscoverable(@Nullable Boolean result) {
+		if (result != null && result) {
+			viewModel.onBluetoothDiscoverable();
+		}
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/contact/connect/BluetoothProgressFragment.java

@@ -0,0 +1,29 @@
+package org.briarproject.briar.android.contact.connect;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class BluetoothProgressFragment extends Fragment {
+
+	final static String TAG = BluetoothProgressFragment.class.getName();
+
+	@Override
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		return inflater
+				.inflate(R.layout.fragment_bluetooth_progress, container, false);
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/contact/connect/ConnectViaBluetoothActivity.java

@@ -0,0 +1,98 @@
+package org.briarproject.briar.android.contact.connect;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.MenuItem;
+import android.widget.Toast;
+
+import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.activity.BriarActivity;
+
+import javax.inject.Inject;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.ViewModelProvider;
+
+import static android.widget.Toast.LENGTH_LONG;
+import static java.util.Objects.requireNonNull;
+import static org.briarproject.briar.android.conversation.ConversationActivity.CONTACT_ID;
+import static org.briarproject.briar.android.util.UiUtils.showFragment;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class ConnectViaBluetoothActivity extends BriarActivity {
+
+	@Inject
+	ViewModelProvider.Factory viewModelFactory;
+
+	private ConnectViaBluetoothViewModel viewModel;
+
+	@Override
+	public void injectActivity(ActivityComponent component) {
+		component.inject(this);
+
+		viewModel = new ViewModelProvider(this, viewModelFactory)
+				.get(ConnectViaBluetoothViewModel.class);
+	}
+
+	@Override
+	public void onCreate(@Nullable Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+
+		Intent intent = requireNonNull(getIntent());
+		int contactId = intent.getIntExtra(CONTACT_ID, -1);
+		if (contactId == -1) throw new IllegalArgumentException("ContactId");
+		viewModel.setContactId(new ContactId(contactId));
+
+		setContentView(R.layout.activity_fragment_container);
+
+		viewModel.getState().observeEvent(this, this::onStateChanged);
+
+		if (savedInstanceState == null) {
+			Fragment f = new BluetoothIntroFragment();
+			String tag = BluetoothIntroFragment.TAG;
+			getSupportFragmentManager().beginTransaction()
+					.replace(R.id.fragmentContainer, f, tag)
+					.commitNow();
+		}
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		viewModel.reset();
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(@NonNull MenuItem item) {
+		if (item.getItemId() == android.R.id.home) {
+			onBackPressed();
+			return true;
+		}
+		return super.onOptionsItemSelected(item);
+	}
+
+	private void onStateChanged(ConnectViaBluetoothState state) {
+		if (state instanceof ConnectViaBluetoothState.Connecting) {
+			Fragment f = new BluetoothProgressFragment();
+			String tag = BluetoothProgressFragment.TAG;
+			showFragment(getSupportFragmentManager(), f, tag, false);
+		} else if (state instanceof ConnectViaBluetoothState.Success) {
+			Toast.makeText(this, R.string.connect_via_bluetooth_success,
+					LENGTH_LONG).show();
+			supportFinishAfterTransition();
+		} else if (state instanceof ConnectViaBluetoothState.Error) {
+			Toast.makeText(this,
+					((ConnectViaBluetoothState.Error) state).errorRes,
+					LENGTH_LONG).show();
+			supportFinishAfterTransition();
+		} else throw new AssertionError();
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/contact/connect/ConnectViaBluetoothModule.java

@@ -0,0 +1,19 @@
+package org.briarproject.briar.android.contact.connect;
+
+import org.briarproject.briar.android.viewmodel.ViewModelKey;
+
+import androidx.lifecycle.ViewModel;
+import dagger.Binds;
+import dagger.Module;
+import dagger.multibindings.IntoMap;
+
+@Module
+public abstract class ConnectViaBluetoothModule {
+
+	@Binds
+	@IntoMap
+	@ViewModelKey(ConnectViaBluetoothViewModel.class)
+	abstract ViewModel bindContactListViewModel(
+			ConnectViaBluetoothViewModel connectViaBluetoothViewModel);
+
+}

briar-android/src/main/java/org/briarproject/briar/android/contact/connect/ConnectViaBluetoothState.java

@@ -0,0 +1,23 @@
+package org.briarproject.briar.android.contact.connect;
+
+import androidx.annotation.StringRes;
+
+abstract class ConnectViaBluetoothState {
+
+	static class Connecting extends ConnectViaBluetoothState {
+	}
+
+	static class Success extends ConnectViaBluetoothState {
+	}
+
+	static class Error extends ConnectViaBluetoothState {
+		@StringRes
+		final int errorRes;
+
+		Error(@StringRes int errorRes) {
+			this.errorRes = errorRes;
+		}
+	}
+
+}
+

briar-android/src/main/java/org/briarproject/briar/android/contact/connect/ConnectViaBluetoothViewModel.java

@@ -1,19 +1,20 @@
-package org.briarproject.briar.android.conversation;
+package org.briarproject.briar.android.contact.connect;
 
-import android.app.Activity;
 import android.app.Application;
 import android.bluetooth.BluetoothAdapter;
-import android.content.Context;
-import android.widget.Toast;
 
 import org.briarproject.bramble.api.connection.ConnectionManager;
 import org.briarproject.bramble.api.connection.ConnectionRegistry;
 import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.db.DatabaseExecutor;
 import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.db.TransactionManager;
 import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.event.EventListener;
 import org.briarproject.bramble.api.lifecycle.IoExecutor;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.PluginManager;
 import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
 import org.briarproject.bramble.api.plugin.event.ConnectionOpenedEvent;
@@ -21,23 +22,22 @@ import org.briarproject.bramble.api.properties.TransportPropertyManager;
 import org.briarproject.bramble.api.system.AndroidExecutor;
 import org.briarproject.bramble.plugin.bluetooth.BluetoothPlugin;
 import org.briarproject.briar.R;
-import org.briarproject.briar.android.contact.ContactItem;
+import org.briarproject.briar.android.contact.connect.ConnectViaBluetoothState.Connecting;
+import org.briarproject.briar.android.contact.connect.ConnectViaBluetoothState.Success;
+import org.briarproject.briar.android.viewmodel.DbViewModel;
+import org.briarproject.briar.android.viewmodel.LiveEvent;
+import org.briarproject.briar.android.viewmodel.MutableLiveEvent;
 
 import java.util.concurrent.Executor;
 import java.util.logging.Logger;
 
+import javax.annotation.Nullable;
 import javax.inject.Inject;
 
-import androidx.activity.result.ActivityResultLauncher;
 import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.annotation.StringRes;
 import androidx.annotation.UiThread;
-import androidx.appcompat.app.AlertDialog;
 
-import static android.Manifest.permission.ACCESS_FINE_LOCATION;
+import static java.util.Objects.requireNonNull;
-import static android.os.Build.VERSION.SDK_INT;
-import static androidx.core.app.ActivityCompat.shouldShowRequestPermissionRationale;
 import static java.util.concurrent.TimeUnit.SECONDS;
 import static java.util.logging.Level.WARNING;
 import static java.util.logging.Logger.getLogger;
@@ -46,48 +46,50 @@ import static org.briarproject.bramble.api.plugin.BluetoothConstants.PROP_UUID;
 import static org.briarproject.bramble.api.plugin.Plugin.State.ACTIVE;
 import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
-import static org.briarproject.briar.android.util.UiUtils.getGoToSettingsListener;
-import static org.briarproject.briar.android.util.UiUtils.isLocationEnabled;
-import static org.briarproject.briar.android.util.UiUtils.showLocationDialog;
 
-class BluetoothConnecter implements EventListener {
+@UiThread
+@NotNullByDefault
+class ConnectViaBluetoothViewModel extends DbViewModel implements
+		EventListener {
 
-	private final Logger LOG = getLogger(BluetoothConnecter.class.getName());
+	private final Logger LOG =
+			getLogger(ConnectViaBluetoothViewModel.class.getName());
 
 	private final long BT_ACTIVE_TIMEOUT = SECONDS.toMillis(5);
 
-	private enum Permission {
-		UNKNOWN, GRANTED, SHOW_RATIONALE, PERMANENTLY_DENIED
-	}
-
-	private final Application app;
 	private final PluginManager pluginManager;
 	private final Executor ioExecutor;
-	private final AndroidExecutor androidExecutor;
 	private final ConnectionRegistry connectionRegistry;
+	@Nullable
 	private final BluetoothAdapter bt = BluetoothAdapter.getDefaultAdapter();
 	private final EventBus eventBus;
 	private final TransportPropertyManager transportPropertyManager;
 	private final ConnectionManager connectionManager;
 
+	@Nullable
 	private volatile BluetoothPlugin bluetoothPlugin;
-
+	@Nullable
-	private Permission locationPermission = Permission.UNKNOWN;
 	private ContactId contactId = null;
 
+	private final MutableLiveEvent<ConnectViaBluetoothState> state =
+			new MutableLiveEvent<>();
+
 	@Inject
-	BluetoothConnecter(Application app,
+	ConnectViaBluetoothViewModel(
+			Application app,
+			@DatabaseExecutor Executor dbExecutor,
+			LifecycleManager lifecycleManager,
+			TransactionManager db,
+			AndroidExecutor androidExecutor,
 			PluginManager pluginManager,
 			@IoExecutor Executor ioExecutor,
-			AndroidExecutor androidExecutor,
 			ConnectionRegistry connectionRegistry,
 			EventBus eventBus,
 			TransportPropertyManager transportPropertyManager,
 			ConnectionManager connectionManager) {
-		this.app = app;
+		super(app, dbExecutor, lifecycleManager, db, androidExecutor);
 		this.pluginManager = pluginManager;
 		this.ioExecutor = ioExecutor;
-		this.androidExecutor = androidExecutor;
 		this.bluetoothPlugin = (BluetoothPlugin) pluginManager.getPlugin(ID);
 		this.connectionRegistry = connectionRegistry;
 		this.eventBus = eventBus;
@@ -95,20 +97,22 @@ class BluetoothConnecter implements EventListener {
 		this.connectionManager = connectionManager;
 	}
 
-	boolean isConnectedViaBluetooth(ContactId contactId) {
+	@Override
-		return connectionRegistry.isConnected(contactId, ID);
+	protected void onCleared() {
-	}
+		stopConnecting();
-
-	boolean isDiscovering() {
-		return bluetoothPlugin.isDiscovering();
 	}
 
 	/**
-	 * Call this when the using activity or fragment starts,
+	 * Set this as soon as it becomes available.
-	 * because permissions might have changed while it was stopped.
+	 */
+	void setContactId(ContactId contactId) {
+		this.contactId = contactId;
+	}
+
+	/**
+	 * Call this when the using activity or fragment starts.
 	 */
 	void reset() {
-		locationPermission = Permission.UNKNOWN;
 		// When this class is instantiated before we are logged in
 		// (like when returning to a killed activity), bluetoothPlugin would be
 		// null and we consider bluetooth not supported. So reset here.
@@ -116,94 +120,52 @@ class BluetoothConnecter implements EventListener {
 	}
 
 	@UiThread
-	void onLocationPermissionResult(Activity activity,
+	boolean shouldStartFlow() {
-			@Nullable Boolean result) {
+		if (isBluetoothNotSupported()) {
-		if (result != null && result) {
+			state.setEvent(new ConnectViaBluetoothState.Error(
-			locationPermission = Permission.GRANTED;
+					R.string.bt_plugin_status_inactive));
-		} else if (shouldShowRequestPermissionRationale(activity,
+			return false;
-				ACCESS_FINE_LOCATION)) {
+		} else if (isConnectedViaBluetooth()) {
-			locationPermission = Permission.SHOW_RATIONALE;
+			state.setEvent(new Success());
-		} else {
+			return false;
-			locationPermission = Permission.PERMANENTLY_DENIED;
+		} else if (isDiscovering()) {
+			state.setEvent(new ConnectViaBluetoothState.Error(
+					R.string.connect_via_bluetooth_already_discovering));
+			return false;
 		}
+		return true;
 	}
 
-	boolean isBluetoothNotSupported() {
+	private boolean isBluetoothNotSupported() {
 		return bt == null || bluetoothPlugin == null;
 	}
 
-	boolean areRequirementsFulfilled(Context ctx,
+	private boolean isDiscovering() {
-			ActivityResultLauncher<String> permissionRequest,
+		// we should not be calling this if isBluetoothNotSupported() is true
-			Runnable onLocationDenied) {
+		return requireNonNull(bluetoothPlugin).isDiscovering();
-		boolean permissionGranted =
-				SDK_INT < 23 || locationPermission == Permission.GRANTED;
-		boolean locationEnabled = isLocationEnabled(ctx);
-		if (permissionGranted && locationEnabled) return true;
-
-		if (locationPermission == Permission.PERMANENTLY_DENIED) {
-			showDenialDialog(ctx, onLocationDenied);
-		} else if (locationPermission == Permission.SHOW_RATIONALE) {
-			showRationale(ctx, permissionRequest);
-		} else if (!locationEnabled) {
-			showLocationDialog(ctx);
-		}
-		return false;
 	}
 
-	private void showDenialDialog(Context ctx, Runnable onLocationDenied) {
+	private boolean isConnectedViaBluetooth() {
-		new AlertDialog.Builder(ctx, R.style.BriarDialogTheme)
+		return connectionRegistry.isConnected(requireNonNull(contactId), ID);
-				.setTitle(R.string.permission_location_title)
-				.setMessage(R.string.permission_location_denied_body)
-				.setPositiveButton(R.string.ok, getGoToSettingsListener(ctx))
-				.setNegativeButton(R.string.cancel, (v, d) ->
-						onLocationDenied.run())
-				.show();
-	}
-
-	private void showRationale(Context ctx,
-			ActivityResultLauncher<String> permissionRequest) {
-		new AlertDialog.Builder(ctx, R.style.BriarDialogTheme)
-				.setTitle(R.string.permission_location_title)
-				.setMessage(R.string.permission_location_request_body)
-				.setPositiveButton(R.string.ok, (dialog, which) ->
-						permissionRequest.launch(ACCESS_FINE_LOCATION))
-				.show();
 	}
 
 	@UiThread
-	void onBluetoothDiscoverable(ContactItem contact) {
+	void onBluetoothDiscoverable() {
-		contactId = contact.getContact().getId();
+		ContactId contactId = requireNonNull(this.contactId);
-		connect();
+		BluetoothPlugin bluetoothPlugin = requireNonNull(this.bluetoothPlugin);
-	}
 
-	@UiThread
+		state.setEvent(new Connecting());
-	@Override
-	public void eventOccurred(@NonNull Event e) {
-		if (e instanceof ConnectionOpenedEvent) {
-			ConnectionOpenedEvent c = (ConnectionOpenedEvent) e;
-			if (c.getContactId().equals(contactId) && c.isIncoming() &&
-					c.getTransportId() == ID) {
-				if (bluetoothPlugin != null) {
-					bluetoothPlugin.stopDiscoverAndConnect();
-				}
-				LOG.info("Contact connected to us");
-				showToast(R.string.toast_connect_via_bluetooth_success);
-			}
-		}
-	}
 
-	private void connect() {
 		bluetoothPlugin.disablePolling();
 		pluginManager.setPluginEnabled(ID, true);
-
 		ioExecutor.execute(() -> {
 			try {
 				if (!waitForBluetoothActive()) {
-					showToast(R.string.bt_plugin_status_inactive);
+					state.postEvent(new ConnectViaBluetoothState.Error(
+							R.string.bt_plugin_status_inactive));
 					LOG.warning("Bluetooth plugin didn't become active");
 					return;
 				}
-				showToast(R.string.toast_connect_via_bluetooth_start);
 				eventBus.addListener(this);
 				try {
 					String uuid = null;
@@ -226,7 +188,7 @@ class BluetoothConnecter implements EventListener {
 						LOG.info("Could connect, handling connection");
 						connectionManager
 								.manageOutgoingConnection(contactId, ID, conn);
-						showToast(R.string.toast_connect_via_bluetooth_success);
+						state.postEvent(new Success());
 					}
 				} finally {
 					eventBus.removeListener(this);
@@ -237,8 +199,23 @@ class BluetoothConnecter implements EventListener {
 		});
 	}
 
+	@UiThread
+	@Override
+	public void eventOccurred(@NonNull Event e) {
+		if (e instanceof ConnectionOpenedEvent) {
+			ConnectionOpenedEvent c = (ConnectionOpenedEvent) e;
+			if (c.getContactId().equals(contactId) && c.isIncoming() &&
+					c.getTransportId() == ID) {
+				stopConnecting();
+				LOG.info("Contact connected to us");
+				state.postEvent(new Success());
+			}
+		}
+	}
+
 	@IoExecutor
 	private boolean waitForBluetoothActive() {
+		BluetoothPlugin bluetoothPlugin = requireNonNull(this.bluetoothPlugin);
 		long left = BT_ACTIVE_TIMEOUT;
 		final long sleep = 250;
 		try {
@@ -264,9 +241,9 @@ class BluetoothConnecter implements EventListener {
 		final long sleep = 250;
 		try {
 			while (left > 0) {
-				if (isConnectedViaBluetooth(contactId)) {
+				if (isConnectedViaBluetooth()) {
 					LOG.info("Failed to connect, but contact connected");
-					// no Toast needed here, as it gets shown when
+					// no success state needed here, as it gets shown when
 					// ConnectionOpenedEvent is received
 					return;
 				}
@@ -277,13 +254,19 @@ class BluetoothConnecter implements EventListener {
 			Thread.currentThread().interrupt();
 		}
 		LOG.warning("Failed to connect");
-		showToast(R.string.toast_connect_via_bluetooth_error);
+		state.postEvent(new ConnectViaBluetoothState.Error(
+				R.string.connect_via_bluetooth_error));
 	}
 
-	private void showToast(@StringRes int res) {
+	private void stopConnecting() {
-		androidExecutor.runOnUiThread(() ->
+		BluetoothPlugin bluetoothPlugin = this.bluetoothPlugin;
-				Toast.makeText(app, res, Toast.LENGTH_LONG).show()
+		if (bluetoothPlugin != null) {
-		);
+			bluetoothPlugin.stopDiscoverAndConnect();
+		}
+	}
+
+	LiveEvent<ConnectViaBluetoothState> getState() {
+		return state;
 	}
 
 }

briar-android/src/main/java/org/briarproject/briar/android/conversation/BluetoothConnecterDialogFragment.java

@@ -1,151 +0,0 @@
-package org.briarproject.briar.android.conversation;
-
-import android.app.Activity;
-import android.app.Dialog;
-import android.content.Context;
-import android.os.Bundle;
-import android.view.View;
-import android.widget.Button;
-import android.widget.Toast;
-
-import org.briarproject.bramble.api.contact.ContactId;
-import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
-import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
-import org.briarproject.briar.R;
-import org.briarproject.briar.android.activity.BaseActivity;
-import org.briarproject.briar.android.contact.ContactItem;
-import org.briarproject.briar.android.util.ActivityLaunchers.RequestBluetoothDiscoverable;
-
-import javax.inject.Inject;
-
-import androidx.activity.result.ActivityResultLauncher;
-import androidx.activity.result.contract.ActivityResultContracts.RequestPermission;
-import androidx.annotation.Nullable;
-import androidx.annotation.StringRes;
-import androidx.appcompat.app.AlertDialog;
-import androidx.fragment.app.DialogFragment;
-import androidx.lifecycle.ViewModelProvider;
-
-import static android.Manifest.permission.ACCESS_FINE_LOCATION;
-import static android.content.DialogInterface.BUTTON_POSITIVE;
-import static android.widget.Toast.LENGTH_LONG;
-import static java.util.Objects.requireNonNull;
-
-@MethodsNotNullByDefault
-@ParametersNotNullByDefault
-public class BluetoothConnecterDialogFragment extends DialogFragment {
-
-	final static String TAG = BluetoothConnecterDialogFragment.class.getName();
-
-	@Inject
-	ViewModelProvider.Factory viewModelFactory;
-
-	private ConversationViewModel viewModel;
-	private BluetoothConnecter bluetoothConnecter;
-
-	private final ActivityResultLauncher<Integer> bluetoothDiscoverableRequest =
-			registerForActivityResult(new RequestBluetoothDiscoverable(),
-					this::onBluetoothDiscoverable);
-	private final ActivityResultLauncher<String> permissionRequest =
-			registerForActivityResult(new RequestPermission(),
-					this::onPermissionRequestResult);
-
-	@Override
-	public void onAttach(Context ctx) {
-		super.onAttach(ctx);
-		((BaseActivity) requireActivity()).getActivityComponent().inject(this);
-		viewModel = new ViewModelProvider(requireActivity(), viewModelFactory)
-				.get(ConversationViewModel.class);
-		bluetoothConnecter = viewModel.getBluetoothConnecter();
-	}
-
-	@Override
-	public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
-		Context ctx = requireContext();
-		return new AlertDialog.Builder(ctx, R.style.BriarDialogTheme)
-				.setTitle(R.string.dialog_title_connect_via_bluetooth)
-				.setMessage(R.string.dialog_message_connect_via_bluetooth)
-				// actual listener gets set in onResume()
-				.setPositiveButton(R.string.start, null)
-				.setNegativeButton(R.string.cancel, null)
-				.setCancelable(false) // keep it open until dismissed
-				.create();
-	}
-
-	@Override
-	public void onStart() {
-		super.onStart();
-		bluetoothConnecter.reset();
-		if (bluetoothConnecter.isBluetoothNotSupported()) {
-			showToast(R.string.toast_connect_via_bluetooth_error);
-			dismiss();
-			return;
-		}
-		// MenuItem only gets enabled after contactItem has loaded
-		ContactItem contact =
-				requireNonNull(viewModel.getContactItem().getValue());
-		ContactId contactId = contact.getContact().getId();
-		if (bluetoothConnecter.isConnectedViaBluetooth(contactId)) {
-			showToast(R.string.toast_connect_via_bluetooth_success);
-			dismiss();
-			return;
-		}
-		if (bluetoothConnecter.isDiscovering()) {
-			showToast(R.string.toast_connect_via_bluetooth_already_discovering);
-			dismiss();
-		}
-	}
-
-	@Override
-	public void onResume() {
-		super.onResume();
-		// Set the click listener for the START button here
-		// to prevent it from automatically dismissing the dialog.
-		// The dialog is shown in onStart(), so we set the listener here later.
-		AlertDialog dialog = (AlertDialog) getDialog();
-		Button positiveButton = dialog.getButton(BUTTON_POSITIVE);
-		positiveButton.setOnClickListener(this::onStartClicked);
-	}
-
-	private void onStartClicked(View v) {
-		// The dialog starts a permission request which comes back as true
-		// if the permission is already granted.
-		// So we can use the request as a generic entry point to the whole flow.
-		permissionRequest.launch(ACCESS_FINE_LOCATION);
-	}
-
-	private void onPermissionRequestResult(@Nullable Boolean result) {
-		Activity a = requireActivity();
-		// update permission result in BluetoothConnecter
-		bluetoothConnecter.onLocationPermissionResult(a, result);
-		// what to do when the user denies granting the location permission
-		Runnable onLocationPermissionDenied = () -> {
-			Toast.makeText(requireContext(),
-					R.string.toast_connect_via_bluetooth_no_location_permission,
-					LENGTH_LONG).show();
-			dismiss();
-		};
-		// if requirements are fulfilled, request Bluetooth discoverability
-		if (bluetoothConnecter.areRequirementsFulfilled(a, permissionRequest,
-				onLocationPermissionDenied)) {
-			bluetoothDiscoverableRequest.launch(120); // for 2min
-		}
-	}
-
-	private void onBluetoothDiscoverable(@Nullable Boolean result) {
-		if (result != null && result) {
-			// MenuItem only gets enabled after contactItem has loaded
-			ContactItem contact =
-					requireNonNull(viewModel.getContactItem().getValue());
-			bluetoothConnecter.onBluetoothDiscoverable(contact);
-			dismiss();
-		} else {
-			showToast(R.string.toast_connect_via_bluetooth_not_discoverable);
-		}
-	}
-
-	private void showToast(@StringRes int stringRes) {
-		Toast.makeText(requireContext(), stringRes, LENGTH_LONG).show();
-	}
-
-}

briar-android/src/main/java/org/briarproject/briar/android/conversation/ConversationActivity.java

@@ -48,6 +48,7 @@ import org.briarproject.briar.android.activity.BriarActivity;
 import org.briarproject.briar.android.attachment.AttachmentItem;
 import org.briarproject.briar.android.attachment.AttachmentRetriever;
 import org.briarproject.briar.android.blog.BlogActivity;
+import org.briarproject.briar.android.contact.connect.ConnectViaBluetoothActivity;
 import org.briarproject.briar.android.conversation.ConversationVisitor.AttachmentCache;
 import org.briarproject.briar.android.conversation.ConversationVisitor.TextCache;
 import org.briarproject.briar.android.forum.ForumActivity;
@@ -104,7 +105,6 @@ import androidx.appcompat.widget.Toolbar;
 import androidx.core.app.ActivityCompat;
 import androidx.core.app.ActivityOptionsCompat;
 import androidx.core.content.ContextCompat;
-import androidx.fragment.app.FragmentManager;
 import androidx.lifecycle.LiveData;
 import androidx.lifecycle.Observer;
 import androidx.lifecycle.ViewModelProvider;
@@ -379,11 +379,8 @@ public class ConversationActivity extends BriarActivity
 						this::showIntroductionOnboarding);
 			}
 		});
-		if (!featureFlags.shouldEnableConnectViaBluetooth()) {
-			menu.findItem(R.id.action_connect_via_bluetooth).setVisible(false);
-		}
 		// Transfer Data feature only supported on API 19+
-		if (SDK_INT >= 19 && featureFlags.shouldEnableTransferData()) {
+		if (SDK_INT >= 19) {
 			menu.findItem(R.id.action_transfer_data).setVisible(true);
 		}
 		// enable alias and bluetooth action once available
@@ -422,9 +419,9 @@ public class ConversationActivity extends BriarActivity
 			onAutoDeleteTimerNoticeClicked();
 			return true;
 		} else if (itemId == R.id.action_connect_via_bluetooth) {
-			FragmentManager fm = getSupportFragmentManager();
+			Intent intent = new Intent(this, ConnectViaBluetoothActivity.class);
-			new BluetoothConnecterDialogFragment().show(fm,
+			intent.putExtra(CONTACT_ID, contactId.getInt());
-					BluetoothConnecterDialogFragment.TAG);
+			startActivity(intent);
 			return true;
 		} else if (itemId == R.id.action_transfer_data) {
 			Intent intent = new Intent(this, RemovableDriveActivity.class);

briar-android/src/main/java/org/briarproject/briar/android/conversation/ConversationViewModel.java

@@ -101,7 +101,6 @@ public class ConversationViewModel extends DbViewModel
 	private final AttachmentCreator attachmentCreator;
 	private final AutoDeleteManager autoDeleteManager;
 	private final ConversationManager conversationManager;
-	private final BluetoothConnecter bluetoothConnecter;
 
 	@Nullable
 	private ContactId contactId = null;
@@ -140,8 +139,7 @@ public class ConversationViewModel extends DbViewModel
 			AttachmentRetriever attachmentRetriever,
 			AttachmentCreator attachmentCreator,
 			AutoDeleteManager autoDeleteManager,
-			ConversationManager conversationManager,
+			ConversationManager conversationManager) {
-			BluetoothConnecter bluetoothConnecter) {
 		super(application, dbExecutor, lifecycleManager, db, androidExecutor);
 		this.db = db;
 		this.eventBus = eventBus;
@@ -154,7 +152,6 @@ public class ConversationViewModel extends DbViewModel
 		this.attachmentCreator = attachmentCreator;
 		this.autoDeleteManager = autoDeleteManager;
 		this.conversationManager = conversationManager;
-		this.bluetoothConnecter = bluetoothConnecter;
 		messagingGroupId = map(contactItem, c ->
 				messagingManager.getContactGroup(c.getContact()).getId());
 		eventBus.addListener(this);
@@ -414,10 +411,6 @@ public class ConversationViewModel extends DbViewModel
 		return attachmentRetriever;
 	}
 
-	BluetoothConnecter getBluetoothConnecter() {
-		return bluetoothConnecter;
-	}
-
 	LiveData<ContactItem> getContactItem() {
 		return contactItem;
 	}

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

@@ -17,7 +17,7 @@ import androidx.annotation.Nullable;
 @ParametersNotNullByDefault
 public class ErrorFragment extends BaseFragment {
 
-	private static final String TAG = ErrorFragment.class.getName();
+	public static final String TAG = ErrorFragment.class.getName();
 
 	private static final String ERROR_MSG = "errorMessage";
 
@@ -40,8 +40,7 @@ public class ErrorFragment extends BaseFragment {
 	public void onCreate(@Nullable Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 
-		Bundle args = getArguments();
+		Bundle args = requireArguments();
-		if (args == null) throw new AssertionError();
 		errorMessage = args.getString(ERROR_MSG);
 	}
 

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

@@ -7,7 +7,6 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Button;
 import android.widget.ImageView;
-import android.widget.ScrollView;
 import android.widget.TextView;
 
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
@@ -22,9 +21,11 @@ import androidx.annotation.StringRes;
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.widget.ImageViewCompat;
+import androidx.core.widget.NestedScrollView;
 import androidx.fragment.app.Fragment;
 
 import static android.view.View.FOCUS_DOWN;
+import static android.view.View.GONE;
 
 /**
  * A fragment to be used at the end of a user flow
@@ -58,7 +59,7 @@ public class FinalFragment extends Fragment {
 		return f;
 	}
 
-	private ScrollView scrollView;
+	private NestedScrollView scrollView;
 	protected Button buttonView;
 
 	@Nullable
@@ -69,7 +70,7 @@ public class FinalFragment extends Fragment {
 		View v = inflater
 				.inflate(R.layout.fragment_final, container, false);
 
-		scrollView = (ScrollView) v;
+		scrollView = (NestedScrollView) v;
 		ImageView iconView = v.findViewById(R.id.iconView);
 		TextView titleView = v.findViewById(R.id.titleView);
 		TextView textView = v.findViewById(R.id.textView);
@@ -81,7 +82,12 @@ public class FinalFragment extends Fragment {
 		int color = getResources().getColor(args.getInt(ARG_ICON_TINT));
 		ColorStateList tint = ColorStateList.valueOf(color);
 		ImageViewCompat.setImageTintList(iconView, tint);
-		textView.setText(args.getInt(ARG_TEXT));
+		int textRes = args.getInt(ARG_TEXT);
+		if (textRes == 0) {
+			textView.setVisibility(GONE);
+		} else {
+			textView.setText(textRes);
+		}
 
 		buttonView.setOnClickListener(view -> onBackButtonPressed());
 

briar-android/src/main/java/org/briarproject/briar/android/hotspot/AbstractConditionManager.java

@@ -0,0 +1,84 @@
+package org.briarproject.briar.android.hotspot;
+
+import android.content.Context;
+import android.content.DialogInterface;
+import android.net.wifi.WifiManager;
+
+import org.briarproject.briar.R;
+
+import androidx.annotation.StringRes;
+import androidx.appcompat.app.AlertDialog;
+import androidx.core.util.Consumer;
+import androidx.fragment.app.FragmentActivity;
+
+import static android.content.Context.WIFI_SERVICE;
+
+/**
+ * Abstract base class for the ConditionManagers that ensure that the conditions
+ * to open a hotspot are fulfilled. There are different extensions of this for
+ * API levels lower than 29 and 29+.
+ */
+abstract class AbstractConditionManager {
+
+	enum Permission {
+		UNKNOWN, GRANTED, SHOW_RATIONALE, PERMANENTLY_DENIED
+	}
+
+	protected final Consumer<Boolean> permissionUpdateCallback;
+	protected FragmentActivity ctx;
+	WifiManager wifiManager;
+
+	AbstractConditionManager(Consumer<Boolean> permissionUpdateCallback) {
+		this.permissionUpdateCallback = permissionUpdateCallback;
+	}
+
+	/**
+	 * Pass a FragmentActivity context here during `onCreateView()`.
+	 */
+	void init(FragmentActivity ctx) {
+		this.ctx = ctx;
+		this.wifiManager = (WifiManager) ctx.getApplicationContext()
+				.getSystemService(WIFI_SERVICE);
+	}
+
+	/**
+	 * Call this during onStart() in the fragment where the ConditionManager
+	 * is used.
+	 */
+	abstract void onStart();
+
+	/**
+	 * Check if all required conditions are met such that the hotspot can be
+	 * started. If any precondition is not met yet, bring up relevant dialogs
+	 * asking the user to grant relevant permissions or take relevant actions.
+	 *
+	 * @return true if conditions are fulfilled and flow can continue.
+	 */
+	abstract boolean checkAndRequestConditions();
+
+	void showDenialDialog(FragmentActivity ctx,
+			@StringRes int title, @StringRes int body,
+			DialogInterface.OnClickListener onOkClicked, Runnable onDismiss) {
+		AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
+		builder.setTitle(title);
+		builder.setMessage(body);
+		builder.setPositiveButton(R.string.ok, onOkClicked);
+		builder.setNegativeButton(R.string.cancel,
+				(dialog, which) -> ctx.supportFinishAfterTransition());
+		builder.setOnDismissListener(dialog -> onDismiss.run());
+		builder.show();
+	}
+
+	void showRationale(Context ctx, @StringRes int title,
+			@StringRes int body, Runnable onContinueClicked,
+			Runnable onDismiss) {
+		AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
+		builder.setTitle(title);
+		builder.setMessage(body);
+		builder.setNeutralButton(R.string.continue_button,
+				(dialog, which) -> onContinueClicked.run());
+		builder.setOnDismissListener(dialog -> onDismiss.run());
+		builder.show();
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/hotspot/AbstractTabsFragment.java

@@ -0,0 +1,143 @@
+package org.briarproject.briar.android.hotspot;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.google.android.material.tabs.TabLayout;
+import com.google.android.material.tabs.TabLayoutMediator;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+
+import javax.inject.Inject;
+
+import androidx.annotation.CallSuper;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.viewpager2.adapter.FragmentStateAdapter;
+import androidx.viewpager2.widget.ViewPager2;
+
+import static androidx.core.app.ActivityCompat.finishAfterTransition;
+import static org.briarproject.briar.android.AppModule.getAndroidComponent;
+import static org.briarproject.briar.android.util.UiUtils.showFragment;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public abstract class AbstractTabsFragment extends Fragment {
+
+	static String ARG_FOR_WIFI_CONNECT = "forWifiConnect";
+
+	@Inject
+	ViewModelProvider.Factory viewModelFactory;
+
+	protected HotspotViewModel viewModel;
+
+	protected Button stopButton;
+	protected Button connectedButton;
+	protected TextView connectedView;
+
+	@Override
+	public void onAttach(Context context) {
+		super.onAttach(context);
+		getAndroidComponent(requireContext()).inject(this);
+		viewModel = new ViewModelProvider(requireActivity(), viewModelFactory)
+				.get(HotspotViewModel.class);
+	}
+
+	@Override
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		setHasOptionsMenu(true);
+		return inflater
+				.inflate(R.layout.fragment_hotspot_tabs, container, false);
+	}
+
+	@Override
+	@CallSuper
+	public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
+		TabAdapter tabAdapter = new TabAdapter(this);
+		ViewPager2 viewPager = view.findViewById(R.id.pager);
+		viewPager.setAdapter(tabAdapter);
+		TabLayout tabLayout = view.findViewById(R.id.tabLayout);
+		new TabLayoutMediator(tabLayout, viewPager, (tab, position) -> {
+			// tabs are set in XML, but are just dummies that don't get added
+			if (position == 0) {
+				tab.setText(R.string.hotspot_tab_manual);
+				tab.setIcon(R.drawable.forum_item_create_white);
+			} else if (position == 1) {
+				tab.setText(R.string.qr_code);
+				tab.setIcon(R.drawable.ic_qr_code);
+			} else throw new AssertionError();
+		}).attach();
+
+		stopButton = view.findViewById(R.id.stopButton);
+		stopButton.setOnClickListener(v -> {
+			// also clears hotspot
+			finishAfterTransition(requireActivity());
+		});
+		connectedButton = view.findViewById(R.id.connectedButton);
+		connectedView = view.findViewById(R.id.connectedView);
+		viewModel.getPeersConnectedEvent()
+				.observe(getViewLifecycleOwner(), this::onPeerConnected);
+	}
+
+	@Override
+	public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+		inflater.inflate(R.menu.hotspot_help_action, menu);
+		super.onCreateOptionsMenu(menu, inflater);
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		if (item.getItemId() == R.id.action_help) {
+			Fragment f = new HotspotHelpFragment();
+			String tag = HotspotHelpFragment.TAG;
+			showFragment(getParentFragmentManager(), f, tag);
+			return true;
+		}
+		return super.onOptionsItemSelected(item);
+	}
+
+	protected abstract Fragment getFirstFragment();
+
+	protected abstract Fragment getSecondFragment();
+
+	private class TabAdapter extends FragmentStateAdapter {
+		private TabAdapter(Fragment fragment) {
+			super(fragment);
+		}
+
+		@Override
+		public Fragment createFragment(int position) {
+			if (position == 0) return getFirstFragment();
+			if (position == 1) return getSecondFragment();
+			throw new AssertionError();
+		}
+
+		@Override
+		public int getItemCount() {
+			return 2;
+		}
+	}
+
+	private void onPeerConnected(int peers) {
+		if (peers == 0) {
+			connectedView.setText(R.string.hotspot_no_peers_connected);
+		} else {
+			connectedView.setText(getResources().getQuantityString(
+					R.plurals.hotspot_peers_connected, peers, peers));
+		}
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/hotspot/ConditionManager.java

@@ -0,0 +1,83 @@
+package org.briarproject.briar.android.hotspot;
+
+import android.content.Intent;
+import android.provider.Settings;
+
+import org.briarproject.briar.R;
+
+import java.util.logging.Logger;
+
+import androidx.activity.result.ActivityResultCaller;
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.contract.ActivityResultContracts.StartActivityForResult;
+import androidx.core.util.Consumer;
+
+import static java.util.logging.Level.INFO;
+import static java.util.logging.Logger.getLogger;
+
+/**
+ * This class ensures that the conditions to open a hotspot are fulfilled on
+ * API levels < 29.
+ * <p>
+ * As soon as {@link #checkAndRequestConditions()} returns true,
+ * all conditions are fulfilled.
+ */
+class ConditionManager extends AbstractConditionManager {
+
+	private static final Logger LOG =
+			getLogger(ConditionManager.class.getName());
+
+	private final ActivityResultLauncher<Intent> wifiRequest;
+
+	ConditionManager(ActivityResultCaller arc,
+			Consumer<Boolean> permissionUpdateCallback) {
+		super(permissionUpdateCallback);
+		wifiRequest = arc.registerForActivityResult(
+				new StartActivityForResult(),
+				result -> permissionUpdateCallback
+						.accept(wifiManager.isWifiEnabled()));
+	}
+
+	@Override
+	void onStart() {
+		// nothing to do here
+	}
+
+	private boolean areEssentialPermissionsGranted() {
+		if (LOG.isLoggable(INFO)) {
+			LOG.info(String.format("areEssentialPermissionsGranted(): " +
+							"wifiManager.isWifiEnabled()? %b",
+					wifiManager.isWifiEnabled()));
+		}
+		return wifiManager.isWifiEnabled();
+	}
+
+	@Override
+	boolean checkAndRequestConditions() {
+		if (areEssentialPermissionsGranted()) return true;
+
+		if (!wifiManager.isWifiEnabled()) {
+			// Try enabling the Wifi and return true if that seems to have been
+			// successful, i.e. "Wifi is either already in the requested state, or
+			// in progress toward the requested state".
+			if (wifiManager.setWifiEnabled(true)) {
+				LOG.info("Enabled wifi");
+				return true;
+			}
+
+			// Wifi is not enabled and we can't seem to enable it, so ask the user
+			// to enable it for us.
+			showRationale(ctx, R.string.wifi_settings_title,
+					R.string.wifi_settings_request_enable_body,
+					this::requestEnableWiFi,
+					() -> permissionUpdateCallback.accept(false));
+		}
+
+		return false;
+	}
+
+	private void requestEnableWiFi() {
+		wifiRequest.launch(new Intent(Settings.ACTION_WIFI_SETTINGS));
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/hotspot/ConditionManager29.java

@@ -0,0 +1,136 @@
+package org.briarproject.briar.android.hotspot;
+
+import android.content.Intent;
+import android.provider.Settings;
+
+import org.briarproject.briar.R;
+
+import java.util.logging.Logger;
+
+import androidx.activity.result.ActivityResultCaller;
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.contract.ActivityResultContracts.RequestPermission;
+import androidx.activity.result.contract.ActivityResultContracts.StartActivityForResult;
+import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
+import androidx.core.util.Consumer;
+
+import static android.Manifest.permission.ACCESS_FINE_LOCATION;
+import static androidx.core.app.ActivityCompat.shouldShowRequestPermissionRationale;
+import static java.lang.Boolean.TRUE;
+import static java.util.logging.Level.INFO;
+import static java.util.logging.Logger.getLogger;
+import static org.briarproject.briar.android.util.UiUtils.getGoToSettingsListener;
+
+/**
+ * This class ensures that the conditions to open a hotspot are fulfilled on
+ * API levels >= 29.
+ * <p>
+ * As soon as {@link #checkAndRequestConditions()} returns true,
+ * all conditions are fulfilled.
+ */
+@RequiresApi(29)
+class ConditionManager29 extends AbstractConditionManager {
+
+	private static final Logger LOG =
+			getLogger(ConditionManager29.class.getName());
+
+	private Permission locationPermission = Permission.UNKNOWN;
+
+	private final ActivityResultLauncher<String> locationRequest;
+	private final ActivityResultLauncher<Intent> wifiRequest;
+
+	ConditionManager29(ActivityResultCaller arc,
+			Consumer<Boolean> permissionUpdateCallback) {
+		super(permissionUpdateCallback);
+		locationRequest = arc.registerForActivityResult(
+				new RequestPermission(), granted -> {
+					onRequestPermissionResult(granted);
+					permissionUpdateCallback.accept(TRUE.equals(granted));
+				});
+		wifiRequest = arc.registerForActivityResult(
+				new StartActivityForResult(),
+				result -> permissionUpdateCallback
+						.accept(wifiManager.isWifiEnabled())
+		);
+	}
+
+	@Override
+	void onStart() {
+		locationPermission = Permission.UNKNOWN;
+	}
+
+	private boolean areEssentialPermissionsGranted() {
+		boolean isWifiEnabled = wifiManager.isWifiEnabled();
+		if (LOG.isLoggable(INFO)) {
+			LOG.info(String.format("areEssentialPermissionsGranted(): " +
+							"locationPermission? %s, " +
+							"wifiManager.isWifiEnabled()? %b",
+					locationPermission, isWifiEnabled));
+		}
+		return locationPermission == Permission.GRANTED && isWifiEnabled;
+	}
+
+	@Override
+	boolean checkAndRequestConditions() {
+		if (areEssentialPermissionsGranted()) return true;
+
+		if (locationPermission == Permission.UNKNOWN) {
+			locationRequest.launch(ACCESS_FINE_LOCATION);
+			return false;
+		}
+
+		// If the location permission has been permanently denied, ask the
+		// user to change the setting
+		if (locationPermission == Permission.PERMANENTLY_DENIED) {
+			showDenialDialog(ctx, R.string.permission_location_title,
+					R.string.permission_hotspot_location_denied_body,
+					getGoToSettingsListener(ctx),
+					() -> permissionUpdateCallback.accept(false));
+			return false;
+		}
+
+		// Should we show the rationale for location permission?
+		if (locationPermission == Permission.SHOW_RATIONALE) {
+			showRationale(ctx, R.string.permission_location_title,
+					R.string.permission_hotspot_location_request_body,
+					this::requestPermissions,
+					() -> permissionUpdateCallback.accept(false));
+			return false;
+		}
+
+		// If Wifi is not enabled, we show the rationale for enabling Wifi?
+		if (!wifiManager.isWifiEnabled()) {
+			showRationale(ctx, R.string.wifi_settings_title,
+					R.string.wifi_settings_request_enable_body,
+					this::requestEnableWiFi,
+					() -> permissionUpdateCallback.accept(false));
+			return false;
+		}
+
+		// we shouldn't usually reach this point, but if we do, return false
+		// anyway to force a recheck. Maybe some condition changed in the
+		// meantime.
+		return false;
+	}
+
+	private void onRequestPermissionResult(@Nullable Boolean granted) {
+		if (granted != null && granted) {
+			locationPermission = Permission.GRANTED;
+		} else if (shouldShowRequestPermissionRationale(ctx,
+				ACCESS_FINE_LOCATION)) {
+			locationPermission = Permission.SHOW_RATIONALE;
+		} else {
+			locationPermission = Permission.PERMANENTLY_DENIED;
+		}
+	}
+
+	private void requestPermissions() {
+		locationRequest.launch(ACCESS_FINE_LOCATION);
+	}
+
+	private void requestEnableWiFi() {
+		wifiRequest.launch(new Intent(Settings.Panel.ACTION_WIFI));
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/hotspot/FallbackFragment.java

@@ -0,0 +1,127 @@
+package org.briarproject.briar.android.hotspot;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+import android.net.Uri;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.ProgressBar;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.fragment.BaseFragment;
+import org.briarproject.briar.android.util.ActivityLaunchers.CreateDocumentAdvanced;
+
+import java.util.List;
+
+import javax.inject.Inject;
+
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.FragmentActivity;
+import androidx.lifecycle.ViewModelProvider;
+
+import static android.content.Intent.ACTION_SEND;
+import static android.content.Intent.EXTRA_STREAM;
+import static android.content.Intent.FLAG_GRANT_READ_URI_PERMISSION;
+import static android.content.pm.PackageManager.MATCH_DEFAULT_ONLY;
+import static android.os.Build.VERSION.SDK_INT;
+import static android.view.View.INVISIBLE;
+import static android.view.View.VISIBLE;
+import static androidx.transition.TransitionManager.beginDelayedTransition;
+import static org.briarproject.briar.android.AppModule.getAndroidComponent;
+import static org.briarproject.briar.android.hotspot.HotspotViewModel.getApkFileName;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class FallbackFragment extends BaseFragment {
+
+	public static final String TAG = FallbackFragment.class.getName();
+
+	@Inject
+	ViewModelProvider.Factory viewModelFactory;
+
+	private HotspotViewModel viewModel;
+	private final ActivityResultLauncher<String> launcher =
+			registerForActivityResult(new CreateDocumentAdvanced(),
+					this::onDocumentCreated);
+	private Button fallbackButton;
+	private ProgressBar progressBar;
+
+	@Override
+	public String getUniqueTag() {
+		return TAG;
+	}
+
+	@Override
+	public void onAttach(Context context) {
+		super.onAttach(context);
+		FragmentActivity activity = requireActivity();
+		getAndroidComponent(activity).inject(this);
+		viewModel = new ViewModelProvider(activity, viewModelFactory)
+				.get(HotspotViewModel.class);
+	}
+
+	@Nullable
+	@Override
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		return inflater
+				.inflate(R.layout.fragment_hotspot_fallback, container, false);
+	}
+
+	@Override
+	public void onViewCreated(View v, @Nullable Bundle savedInstanceState) {
+		super.onViewCreated(v, savedInstanceState);
+
+		fallbackButton = v.findViewById(R.id.fallbackButton);
+		progressBar = v.findViewById(R.id.progressBar);
+		fallbackButton.setOnClickListener(view -> {
+			beginDelayedTransition((ViewGroup) v);
+			fallbackButton.setVisibility(INVISIBLE);
+			progressBar.setVisibility(VISIBLE);
+
+			if (SDK_INT >= 19) launcher.launch(getApkFileName());
+			else viewModel.exportApk();
+		});
+		viewModel.getSavedApkToUri().observeEvent(this, this::shareUri);
+	}
+
+	private void onDocumentCreated(@Nullable Uri uri) {
+		showButton();
+		if (uri != null) viewModel.exportApk(uri);
+	}
+
+	private void showButton() {
+		beginDelayedTransition((ViewGroup) requireView());
+		fallbackButton.setVisibility(VISIBLE);
+		progressBar.setVisibility(INVISIBLE);
+	}
+
+	void shareUri(Uri uri) {
+		Intent i = new Intent(ACTION_SEND);
+		i.putExtra(EXTRA_STREAM, uri);
+		i.setType("*/*"); // gives us all sharing options
+		i.addFlags(FLAG_GRANT_READ_URI_PERMISSION);
+		Context ctx = requireContext();
+		if (SDK_INT <= 19) {
+			// Workaround for Android bug:
+			// ctx.grantUriPermission also needed for Android 4
+			List<ResolveInfo> resInfoList = ctx.getPackageManager()
+					.queryIntentActivities(i, MATCH_DEFAULT_ONLY);
+			for (ResolveInfo resolveInfo : resInfoList) {
+				String packageName = resolveInfo.activityInfo.packageName;
+				ctx.grantUriPermission(packageName, uri,
+						FLAG_GRANT_READ_URI_PERMISSION);
+			}
+		}
+		startActivity(Intent.createChooser(i, null));
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/hotspot/HotspotActivity.java

@@ -0,0 +1,143 @@
+package org.briarproject.briar.android.hotspot;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.MenuItem;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.activity.BriarActivity;
+import org.briarproject.briar.android.fragment.BaseFragment.BaseFragmentListener;
+import org.briarproject.briar.android.hotspot.HotspotState.HotspotError;
+import org.briarproject.briar.android.hotspot.HotspotState.HotspotStarted;
+
+import javax.annotation.Nullable;
+import javax.inject.Inject;
+
+import androidx.appcompat.app.ActionBar;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+import androidx.lifecycle.ViewModelProvider;
+
+import static org.briarproject.briar.android.util.UiUtils.showFragment;
+import static org.briarproject.briar.api.android.AndroidNotificationManager.ACTION_STOP_HOTSPOT;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class HotspotActivity extends BriarActivity
+		implements BaseFragmentListener {
+
+	@Inject
+	ViewModelProvider.Factory viewModelFactory;
+
+	private HotspotViewModel viewModel;
+
+	@Override
+	public void injectActivity(ActivityComponent component) {
+		component.inject(this);
+		viewModel = new ViewModelProvider(this, viewModelFactory)
+				.get(HotspotViewModel.class);
+	}
+
+	@Override
+	public void onCreate(@Nullable Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_fragment_container);
+
+		ActionBar ab = getSupportActionBar();
+		if (ab != null) {
+			ab.setDisplayHomeAsUpEnabled(true);
+		}
+
+		FragmentManager fm = getSupportFragmentManager();
+		viewModel.getState().observe(this, hotspotState -> {
+			if (hotspotState instanceof HotspotStarted) {
+				HotspotStarted started = (HotspotStarted) hotspotState;
+				String tag = HotspotFragment.TAG;
+				// check if fragment is already added
+				// to not lose state on configuration changes
+				if (fm.findFragmentByTag(tag) == null) {
+					if (started.wasNotYetConsumed()) {
+						started.consume();
+						showFragment(fm, new HotspotFragment(), tag);
+					}
+				}
+			} else if (hotspotState instanceof HotspotError) {
+				HotspotError error = (HotspotError) hotspotState;
+				showErrorFragment(error.getError());
+			}
+		});
+
+		if (savedInstanceState == null) {
+			// If there is no saved instance state, just start with the intro fragment.
+			fm.beginTransaction()
+					.replace(R.id.fragmentContainer, new HotspotIntroFragment(),
+							HotspotIntroFragment.TAG)
+					.commit();
+		} else if (viewModel.getState().getValue() == null) {
+			// If there is saved instance state, then there's either been an
+			// configuration change like rotated device or the activity has been
+			// destroyed and is now being re-created.
+			// In the latter case, the view model will have been destroyed, too.
+			// The activity can only have been destroyed if the user navigated
+			// away from the HotspotActivity which is nothing we
+			// intend to support, so we want to detect that and start from scratch
+			// in this case. We need to clean up existing fragments in order not
+			// to stack new fragments on top of old ones.
+
+			// If it is a configuration change and we moved past the intro
+			// fragment already, then the view model state will be != null,
+			// hence we can use this check for null to determine the destroyed
+			// activity. It can also be null if the user has not pressed
+			// "start sharing" yet, but in that case it won't harm to start from
+			// scratch.
+
+			Fragment current = fm.findFragmentById(R.id.fragmentContainer);
+			if (current instanceof HotspotIntroFragment) {
+				// If the currently displayed fragment is the intro fragment,
+				// there's nothing we need to do.
+				return;
+			}
+
+			// Remove everything from the back stack.
+			fm.popBackStackImmediate(null,
+					FragmentManager.POP_BACK_STACK_INCLUSIVE);
+
+			// Start fresh with the intro fragment.
+			fm.beginTransaction()
+					.replace(R.id.fragmentContainer, new HotspotIntroFragment(),
+							HotspotIntroFragment.TAG)
+					.commit();
+		}
+	}
+
+	private void showErrorFragment(String error) {
+		FragmentManager fm = getSupportFragmentManager();
+		String tag = HotspotErrorFragment.TAG;
+		if (fm.findFragmentByTag(tag) == null) {
+			Fragment f = HotspotErrorFragment.newInstance(error);
+			showFragment(fm, f, tag, false);
+		}
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		if (item.getItemId() == android.R.id.home) {
+			onBackPressed();
+			return true;
+		}
+		return super.onOptionsItemSelected(item);
+	}
+
+	@Override
+	protected void onNewIntent(Intent intent) {
+		super.onNewIntent(intent);
+		if (ACTION_STOP_HOTSPOT.equals(intent.getAction())) {
+			// also closes hotspot
+			supportFinishAfterTransition();
+		}
+	}
+
+}