This repository contains the reference implementation of the Kyber key encapsulation mechanism, Post Quantum Cryptography algorithms usable through Java Native Interface wrappers.

For make a JNI wrapper you should use cmake:

mkdir build
cd build
cmake ..
make

The build result will be available in the /build/Release directory. Or you can just open the project in Visual Studio and build it inside the IDE.

To use the Kyber functions in a JAVA project, you must use the classes located in the /build/Release/ref directory. By default, everything is packaged in the network package.beuchat; If you want to change the package name, you need to change the headers (network_beechat_Kyber512_90s.h and network_beechat_Kyber512.h) in jni/ref directory.

Insert JNI classes into your application and use necessary functions. For example:

import network.beechat.*;
...
public static void main(String[] args) {
    char[] pk = new char[32];
    char[] sk = new char[32];
    int rc = Kyber512.crypto_kem_keypair(pk, sk);
    System.exit(rc);
}

When importing classes (from jni/java), you can change the path to the dynamic library. By default, it is set to the current startup directory. Do not forget about this parameter, because it depends on place of the library.

Example for Windows:

static {
    System.loadLibrary("kyber512_90s_ref_jni.dll");
}

Example for Unix-like:

static {
    System.loadLibrary("libkyber512_ref_jni.so");
}

The necessary shared libraries are placed in /build/Release directory. It is not necessary to use all classes (with _90s and without). Just choose what you want to use.

Paste this commands:

cd test/android
./build_apk.sh

Result APK will be test/android/build/KyberTest.apk. Just install and run.