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

Example 21 with AESFastEngine

use of org.spongycastle.crypto.engines.AESFastEngine in project rskj by rsksmart.

the class ECIESTest method makeIESEngine.

private static EthereumIESEngine makeIESEngine(boolean isEncrypt, ECPoint pub, BigInteger prv, byte[] IV) {
    AESFastEngine aesFastEngine = new AESFastEngine();
    EthereumIESEngine iesEngine = new EthereumIESEngine(new ECDHBasicAgreement(), new ConcatKDFBytesGenerator(new SHA256Digest()), new HMac(new SHA256Digest()), new SHA256Digest(), new BufferedBlockCipher(new SICBlockCipher(aesFastEngine)));
    byte[] d = new byte[] {};
    byte[] e = new byte[] {};
    IESParameters p = new IESWithCipherParameters(d, e, KEY_SIZE, KEY_SIZE);
    ParametersWithIV parametersWithIV = new ParametersWithIV(p, IV);
    iesEngine.init(isEncrypt, new ECPrivateKeyParameters(prv, curve), new ECPublicKeyParameters(pub, curve), parametersWithIV);
    return iesEngine;
}

Example 22 with AESFastEngine

use of org.spongycastle.crypto.engines.AESFastEngine in project rskj by rsksmart.

the class KeyCrypterAes method decrypt.

/**
 * Decrypt bytes previously encrypted with this class.
 *
 * @param dataToDecrypt    The data to decrypt
 * @param key              The AES key to use for decryption
 * @return                 The decrypted bytes
 * @throws                 KeyCrypterException if bytes could not be decrypted
 */
@Override
public byte[] decrypt(EncryptedData dataToDecrypt, KeyParameter key) {
    checkNotNull(dataToDecrypt);
    checkNotNull(key);
    try {
        ParametersWithIV keyWithIv = new ParametersWithIV(new KeyParameter(key.getKey()), dataToDecrypt.initialisationVector);
        // Decrypt the message.
        BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESFastEngine()));
        cipher.init(false, keyWithIv);
        byte[] cipherBytes = dataToDecrypt.encryptedBytes;
        byte[] decryptedBytes = new byte[cipher.getOutputSize(cipherBytes.length)];
        final int length1 = cipher.processBytes(cipherBytes, 0, cipherBytes.length, decryptedBytes, 0);
        final int length2 = cipher.doFinal(decryptedBytes, length1);
        return Arrays.copyOf(decryptedBytes, length1 + length2);
    } catch (Exception e) {
        throw new KeyCrypterException("Could not decrypt bytes", e);
    }
}