Examples with ChaCha7539Engine org.spongycastle.crypto.engines.ChaCha7539Engine used on opensource projects

Example 1 with ChaCha7539Engine

use of org.spongycastle.crypto.engines.ChaCha7539Engine in project KeePassDX by Kunzisoft.

the class PwStreamCipherFactory method getChaCha20.

private static StreamCipher getChaCha20(byte[] key) {
    // Build stream cipher key
    byte[] hash = CryptoUtil.hashSha512(key);
    byte[] key32 = new byte[32];
    byte[] iv = new byte[12];
    System.arraycopy(hash, 0, key32, 0, 32);
    System.arraycopy(hash, 32, iv, 0, 12);
    KeyParameter keyParam = new KeyParameter(key32);
    ParametersWithIV ivParam = new ParametersWithIV(keyParam, iv);
    StreamCipher cipher = new ChaCha7539Engine();
    cipher.init(true, ivParam);
    return cipher;
}