wilson1068 / android-prng

Sample Android shared object which depends on Crypto++ library shared object.

Android-PRNG is a sample Android NDK project to demonstrate two topics. First, it shows you how to compile a real shared object using the Crypto++ library on Android. Second, it shows you how to sample sensors to accumulate seed data to use with a software based random number generator.

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The project requires the Crypto++ library built for Android with architectures armeabi, x86, mips, armeabi-v7a and x86_64. The project looks for them in the following locations based on architecture:

• /usr/local/cryptopp/android-armeabi
• /usr/local/cryptopp/android-armeabi-v7a
• /usr/local/cryptopp/android-mips
• /usr/local/cryptopp/android-x86
• /usr/local/cryptopp/android-x86_64

You can do it by repeatedly building and installing the Crypto++ library. For that task, see "Android (Command Line)" on the Crypto++ wiki at http://www.cryptopp.com/wiki/Android_(Command_Line) .

The executive summary from "Android (Command Line)" is:

git clone https://github.com/weidai11/cryptopp.git
cd cryptopp
wget https://www.cryptopp.com/w/images/0/0a/Setenv-android.sh.zip
unzip -aoq Setenv-android.sh.zip
. ./setenv-android.sh armeabi stlport

make -f GNUmakefile-cross distclean
make -f GNUmakefile-cross static dynamic
sudo make install PREFIX=/usr/local/cryptopp/android-armeabi

Lather, rinse, repeat for each architecture.

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Once you have the libraries installed, use ndk-build to build the library:

cd Android-PRNG
ndk-build

After the native libraries are built, use ant to build the APK and install it on a device:

ant debug install

Once installed, you should find it in the App Launcher.