218 lines
10 KiB
Markdown
218 lines
10 KiB
Markdown
# OpenKeychain (for Android)
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OpenKeychain is an OpenPGP implementation for Android.
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For a more detailed description and installation instructions go to http://www.openkeychain.org .
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### Branches
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* The development of OpenKeychain happens in the "master" branch.
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* For every release a new branch, e.g., "3.2-fixes" is created to backport fixes from "master"
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### Travis CI Build Status of master branch
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[](https://travis-ci.org/open-keychain/open-keychain)
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## How to help the project?
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### Translate the application
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Translations are managed at Transifex, please contribute there at https://www.transifex.com/projects/p/open-keychain/
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### Contribute Code
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1. Lookout for interesting issues on Github. We have tagged issues were we explicitly like to see contributions: https://github.com/open-keychain/open-keychain/labels/help-wanted
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2. Read this README, especially the notes about coding style
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3. Fork OpenKeychain and contribute code (the best part :sunglasses: )
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4. Open a pull request on Github. We will help with occuring problems and merge your changes back into the main project.
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5. PROFIT
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### For bigger changes
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1. Join the development mailinglist at http://groups.google.com/d/forum/openpgp-keychain-dev
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2. Propose bigger changes and discuss the consequences
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I am happy about every code contribution and appreciate your effort to help us developing OpenKeychain!
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## Development
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Development mailinglist at http://groups.google.com/d/forum/openpgp-keychain-dev
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### Build with Gradle
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1. Clone the project from GitHub
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2. Get all external submodules with ``git submodule update --init --recursive``
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3. Have Android SDK "tools", "platform-tools", and "build-tools" directories in your PATH (http://developer.android.com/sdk/index.html)
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4. Open the Android SDK Manager (shell command: ``android``).
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Expand the Tools directory and select "Android SDK Build-tools (Version 21.1.2)".
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Expand the Extras directory and install "Android Support Repository"
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Select everything for the newest SDK Platform, API 22, and also API 21
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5. Export ANDROID_HOME pointing to your Android SDK
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6. Execute ``./gradlew build``
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7. You can install the app with ``adb install -r OpenKeychain/build/outputs/apk/OpenKeychain-debug-unaligned.apk``
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### Run Tests
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1. Use OpenJDK instead of Oracle JDK
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2. Execute ``./gradlew clean testDebug --continue``
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### Run Jacoco Test Coverage
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1. Use OpenJDK instead of Oracle JDK
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2. Execute ``./gradlew clean testDebug jacocoTestReport``
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3. Report is here: OpenKeychain/build/reports/jacoco/jacocoTestReport/html/index.html
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### Development with Android Studio
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We are using the newest [Android Studio](http://developer.android.com/sdk/installing/studio.html) for development. Development with Eclipse is currently not possible because we are using the new [project structure](http://developer.android.com/sdk/installing/studio-tips.html).
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1. Clone the project from Github
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2. Get all external submodules with ``git submodule update --init --recursive``
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3. From Android Studio: File -> Import Project -> Select the cloned top folder
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## Libraries
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### Bouncy Castle
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#### Spongy Castle
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Spongy Castle is the stock Bouncy Castle libraries with a couple of small changes to make it work on Android. OpenKeychain uses a forked version with some small changes. These changes will been sent to Bouncy Castle, and Spongy Castle will be used again when they have filtered down.
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see
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* Fork: https://github.com/openpgp-keychain/spongycastle
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* Spongy Castle: http://rtyley.github.com/spongycastle/
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#### Bouncy Castle resources
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* Repository: https://github.com/bcgit/bc-java
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* Issue tracker: http://www.bouncycastle.org/jira/browse/BJA
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#### Documentation
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* Documentation project at http://www.cryptoworkshop.com/guide/
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* Tests in https://github.com/bcgit/bc-java/tree/master/pg/src/test/java/org/bouncycastle/openpgp/test
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* Examples in https://github.com/bcgit/bc-java/tree/master/pg/src/main/java/org/bouncycastle/openpgp/examples
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* Mailinglist Archive at http://bouncy-castle.1462172.n4.nabble.com/Bouncy-Castle-Dev-f1462173.html
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* Commit changelog of pg subpackage: https://github.com/bcgit/bc-java/commits/master/pg
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## Build System
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We try to make our builds as [reproducible/deterministic](https://blog.torproject.org/blog/deterministic-builds-part-one-cyberwar-and-global-compromise) as possible.
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#### Update Gradle version
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* Always use a fixed Android Gradle plugin version not a dynamic one, e.g. ``0.7.3`` instead of ``0.7.+`` (allows offline builds without lookups for new versions, also some minor Android plugin versions had serious issues, i.e. [0.7.2 and 0.8.1](http://tools.android.com/tech-docs/new-build-system))
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* Update every build.gradle file with the new gradle version and/or gradle plugin version
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* build.gradle
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* OpenKeychain/build.gradle
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* run ./gradlew wrapper twice to update gradle and download the new gradle jar file
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* commit the corresponding [Gradle wrapper](http://www.gradle.org/docs/current/userguide/gradle_wrapper.html) to the repository (allows easy building for new contributors without the need to install the required Gradle version using a package manager)
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#### Update SDK and Build Tools
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* Open build.gradle and change:
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```
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ext {
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compileSdkVersion = 21
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buildToolsVersion = '21.1.2'
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}
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```
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* Change SDK and Build Tools in git submodules "openkeychain-api-lib" and "openpgp-api-lib" manually. They should also build on their own without the ext variables.
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#### Add new library
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* You can add the library as a Maven dependency or as a git submodule (if patches are required) in the "extern" folder.
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* If added as a Maven dependency, pin the library using [Gradle Witness](https://github.com/WhisperSystems/gradle-witness) (Do ``./gradlew -q calculateChecksums`` for Trust on First Use)
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* If added as a git submodule, change the ``compileSdkVersion`` and ``buildToolsVersion`` in build.gradle to use the variables from the root project:
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```
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android {
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compileSdkVersion rootProject.ext.compileSdkVersion
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buildToolsVersion rootProject.ext.buildToolsVersion
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}
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```
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* You can check for wrong ``compileSdkVersion`` by ``find -name build.gradle | xargs grep compileSdkVersion``
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#### Slow Gradle?
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* https://www.timroes.de/2013/09/12/speed-up-gradle/
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* Disable Lint checking if it is enabled in build.gradle
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#### Error:Configuration with name 'default' not found.
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Gradle project dependencies are missing. Do a ``git submodule init && git submodule update``
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#### Build on Mac OS X fails?
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Try exporting JAVA_TOOL_OPTIONS="-Dfile.encoding=UTF8"
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## Translations
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Translations are hosted on Transifex, which is configured by ".tx/config".
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1. To pull newest translations install transifex client (e.g. ``apt-get install transifex-client``)
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2. Config Transifex client with "~/.transifexrc"
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3. Go into root folder of git repo
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4. execute ``tx pull -af --skip``
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see http://help.transifex.net/features/client/index.html#user-client
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## Coding Style
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### Code
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* Indentation: 4 spaces, no tabs
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* Maximum line width for code and comments: 100
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* Opening braces don't go on their own line
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* Field names: Non-public, non-static fields start with m.
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* Acronyms are words: Treat acronyms as words in names, yielding !XmlHttpRequest, getUrl(), etc.
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* Fully Qualify Imports: Do *not* use wildcard-imports such as ``import foo.*;``
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The full coding style can be found at http://source.android.com/source/code-style.html
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### Automated syntax check with CheckStyle
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#### Linux
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1. Paste the `tools/checkstyle.xml` file to `~/.AndroidStudioPreview/config/codestyles/`
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2. Go to Settings > Code Style > Java, select OpenPgpChecker, as well as Code Style > XML and select OpenPgpChecker again.
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3. Start code inspection and see the results by selecting Analyze > Inspect Code from Android-Studio or you can directly run checkstyle via cli with `.tools/checkstyle`. Make sure it's executable first.
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#### Mac OSX
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1. Paste the `tools/checkstyle.xml` file to `~/Library/Preferences/AndroidStudioPreview/codestyles`
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2. Go to Preferences > Code Style > Java, select OpenPgpChecker, as well as Code Style > XML and select OpenPgpChecker again.
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3. Start code inspection and see the results by selecting Analyze > Inspect Code from Android-Studio or you can directly run checkstyle via cli with `.tools/checkstyle`. Make sure it's executable first.
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#### Windows
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1. Paste the `tools/checkstyle.xml` file to `C:\Users\<UserName>\.AndroidStudioPreview\config\codestyles`
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2. Go to File > Settings > Code Style > Java, select OpenPgpChecker, as well as Code Style > XML and select OpenPgpChecker again.
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3. Start code inspection and see the results by selecting Analyze > Inspect Code from Android-Studio.
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## Licenses
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OpenKechain is licensed under GPLv3+.
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The full license text can be found in the [LICENSE file](https://github.com/open-keychain/open-keychain/blob/HEAD/LICENSE).
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Some parts and some libraries are Apache License v2, MIT X11 License (see below).
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> This program is free software: you can redistribute it and/or modify
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> it under the terms of the GNU General Public License as published by
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> the Free Software Foundation, either version 3 of the License, or
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> (at your option) any later version.
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>
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> This program is distributed in the hope that it will be useful,
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> but WITHOUT ANY WARRANTY; without even the implied warranty of
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> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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> GNU General Public License for more details.
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>
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> You should have received a copy of the GNU General Public License
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> along with this program. If not, see <http://www.gnu.org/licenses/>.
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### Libraries
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See [In-app about screen](https://github.com/open-keychain/open-keychain/blob/HEAD/OpenKeychain/src/main/res/raw/help_about.md)
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### Images
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* icon.svg
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modified version of kgpg_key2_kopete.svgz
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* Actionbar icons
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http://developer.android.com/design/downloads/index.html#action-bar-icon-pack
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* QR Code Actionbar icon
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https://github.com/openintents/openintents/blob/master/extensions/qrcode_ext/icons/ic_menu_qr_code/ic_menu_qr_code_holo_light/ic_menu_qr_code.svg
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* Key status icons by the ModernPGP working group
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https://github.com/ModernPGP
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* Purple color scheme
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http://android-holo-colors.com/
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