garyttierney/chacha20-poly1305-jni

A Java Native Interface to libsodiums ChaCha20-Poly1305 AEAD mode

chacha20-poly1305-jni

chacha20-poly1305-jni is a small wrapper around libsodium's ChaCha20-Poly1305 AEAD primitives.

Example code

class ChaCha20Poly1305JniExample {
	public static void main(String[] argv) {
		SecureRandom random = new SecureRandom();

		AeadMode mode = AeadMode.CHACHA20_POLY1305;
		byte[] key = new byte[mode.getKeySize()];
		random.nextBytes(key);

		byte[] plaintextData = "ABC".getBytes();
		byte[] additionalData = "DEF".getBytes();

		AeadCipher cipher = new AeadCipher(new SecretKey(key), mode);
		ByteBuffer nonce = cipher.randomNonce();

		ByteBuffer ciphertext = cipher.encrypt(msg, plaintextBytes.length, additional,
						      additionalBytes.length, nonce);
	}

	private static ByteBuffer wrapDirect(byte[] data) {
		ByteBuffer buffer = ByteBuffer.allocateDirect(data.length);
		buffer.put(data);
		buffer.position(0);

		return buffer;
	}
}

Thread-safety

After System.loadLibrary("chacha20poly1305jni") is called the native library will initialize libsodium and all further calls to AeadCipher crypto functions will be thread-safe.