Examples with BufferedBlockCipher org.spongycastle.crypto.BufferedBlockCipher used on opensource projects

Example 6 with BufferedBlockCipher

use of org.spongycastle.crypto.BufferedBlockCipher in project nuls by nuls-io.

the class AESEncrypt method encrypt.

/**
 * 加密
 *
 * @param plainBytes
 * @param iv
 * @param aesKey
 * @return EncryptedData
 */
public static EncryptedData encrypt(byte[] plainBytes, byte[] iv, KeyParameter aesKey) throws NulsRuntimeException {
    Utils.checkNotNull(plainBytes);
    Utils.checkNotNull(aesKey);
    try {
        if (iv == null) {
            iv = new byte[16];
            SECURE_RANDOM.nextBytes(iv);
        }
        ParametersWithIV keyWithIv = new ParametersWithIV(aesKey, iv);
        // Encrypt using AES.
        BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESFastEngine()));
        cipher.init(true, keyWithIv);
        byte[] encryptedBytes = new byte[cipher.getOutputSize(plainBytes.length)];
        final int length1 = cipher.processBytes(plainBytes, 0, plainBytes.length, encryptedBytes, 0);
        final int length2 = cipher.doFinal(encryptedBytes, length1);
        return new EncryptedData(iv, Arrays.copyOf(encryptedBytes, length1 + length2));
    } catch (Exception e) {
        throw new NulsRuntimeException(e);
    }
}

Example 7 with BufferedBlockCipher

use of org.spongycastle.crypto.BufferedBlockCipher in project nuls by nuls-io.

the class AESEncrypt method decrypt.

/**
 * 解密
 *
 * @param dataToDecrypt
 * @param aesKey
 * @return byte[]
 * @throws NulsRuntimeException
 */
public static byte[] decrypt(EncryptedData dataToDecrypt, KeyParameter aesKey) throws NulsRuntimeException {
    Utils.checkNotNull(dataToDecrypt);
    Utils.checkNotNull(aesKey);
    try {
        ParametersWithIV keyWithIv = new ParametersWithIV(new KeyParameter(aesKey.getKey()), dataToDecrypt.getInitialisationVector());
        // Decrypt the message.
        BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESFastEngine()));
        cipher.init(false, keyWithIv);
        byte[] cipherBytes = dataToDecrypt.getEncryptedBytes();
        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 NulsRuntimeException(e);
    }
}

Example 8 with BufferedBlockCipher

use of org.spongycastle.crypto.BufferedBlockCipher in project Zom-Android by zom.

the class OtrCryptoEngineImpl method aesDecrypt.

public byte[] aesDecrypt(byte[] key, byte[] ctr, byte[] b) throws OtrCryptoException {
    AESFastEngine aesDec = new AESFastEngine();
    SICBlockCipher sicAesDec = new SICBlockCipher(aesDec);
    BufferedBlockCipher bufSicAesDec = new BufferedBlockCipher(sicAesDec);
    // Create initial counter value 0.
    if (ctr == null)
        ctr = ZERO_CTR;
    bufSicAesDec.init(false, new ParametersWithIV(new KeyParameter(key), ctr));
    byte[] aesOutLwDec = new byte[b.length];
    int done = bufSicAesDec.processBytes(b, 0, b.length, aesOutLwDec, 0);
    try {
        bufSicAesDec.doFinal(aesOutLwDec, done);
    } catch (Exception e) {
        throw new OtrCryptoException(e);
    }
    return aesOutLwDec;
}

Example 9 with BufferedBlockCipher

use of org.spongycastle.crypto.BufferedBlockCipher in project Zom-Android by zom.

the class OtrCryptoEngineImpl method aesEncrypt.

public byte[] aesEncrypt(byte[] key, byte[] ctr, byte[] b) throws OtrCryptoException {
    AESFastEngine aesEnc = new AESFastEngine();
    SICBlockCipher sicAesEnc = new SICBlockCipher(aesEnc);
    BufferedBlockCipher bufSicAesEnc = new BufferedBlockCipher(sicAesEnc);
    // Create initial counter value 0.
    if (ctr == null)
        ctr = ZERO_CTR;
    bufSicAesEnc.init(true, new ParametersWithIV(new KeyParameter(key), ctr));
    byte[] aesOutLwEnc = new byte[b.length];
    int done = bufSicAesEnc.processBytes(b, 0, b.length, aesOutLwEnc, 0);
    try {
        bufSicAesEnc.doFinal(aesOutLwEnc, done);
    } catch (Exception e) {
        throw new OtrCryptoException(e);
    }
    return aesOutLwEnc;
}

Example 10 with BufferedBlockCipher

use of org.spongycastle.crypto.BufferedBlockCipher in project rskj by rsksmart.

the class ECIESCoder 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;
}