Examples with CBCBlockCipher org.bouncycastle.crypto.modes.CBCBlockCipher used on opensource projects

Example 21 with CBCBlockCipher

use of org.bouncycastle.crypto.modes.CBCBlockCipher in project faf-java-server by FAForever.

the class UniqueIdService method aesDecrypt.

private byte[] aesDecrypt(byte[] initVector, byte[] aesEncryptedJson, byte[] aesKey) throws InvalidCipherTextException {
    PaddedBufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESFastEngine()));
    cipher.init(false, new ParametersWithIV(new KeyParameter(aesKey), initVector));
    int plaintextSize = cipher.processBytes(aesEncryptedJson, 0, aesEncryptedJson.length, aesEncryptedJson, 0);
    plaintextSize += cipher.doFinal(aesEncryptedJson, plaintextSize);
    return Arrays.copyOf(aesEncryptedJson, plaintextSize);
}

Example 22 with CBCBlockCipher

use of org.bouncycastle.crypto.modes.CBCBlockCipher in project samourai-wallet-android by Samourai-Wallet.

the class AESUtil method encryptWithSetMode.

public static String encryptWithSetMode(String cleartext, CharSequenceX password, int iterations, int mode, @Nullable BlockCipherPadding padding) throws DecryptionException, UnsupportedEncodingException {
    final int AESBlockSize = 4;
    if (password == null) {
        throw new DecryptionException("Password null");
    }
    // Use secure random to generate a 16 byte iv
    SecureRandom random = new SecureRandom();
    byte[] iv = new byte[AESBlockSize * 4];
    random.nextBytes(iv);
    byte[] clearbytes = cleartext.getBytes("UTF-8");
    PBEParametersGenerator generator = new PKCS5S2ParametersGenerator();
    generator.init(PBEParametersGenerator.PKCS5PasswordToUTF8Bytes(password.toString().toCharArray()), iv, iterations);
    KeyParameter keyParam = (KeyParameter) generator.generateDerivedParameters(256);
    CipherParameters params = new ParametersWithIV(keyParam, iv);
    BlockCipher cipherMode;
    if (mode == MODE_CBC) {
        cipherMode = new CBCBlockCipher(new AESEngine());
    } else {
        // mode == MODE_OFB
        cipherMode = new OFBBlockCipher(new AESEngine(), 128);
    }
    BufferedBlockCipher cipher;
    if (padding != null) {
        cipher = new PaddedBufferedBlockCipher(cipherMode, padding);
    } else {
        cipher = new BufferedBlockCipher(cipherMode);
    }
    cipher.reset();
    cipher.init(true, params);
    byte[] outBuf = cipherData(cipher, clearbytes);
    // Append to IV to the output
    int len1 = iv.length;
    int len2 = outBuf.length;
    byte[] ivAppended = new byte[len1 + len2];
    System.arraycopy(iv, 0, ivAppended, 0, len1);
    System.arraycopy(outBuf, 0, ivAppended, len1, len2);
    // String ret = Base64.encodeBase64String(ivAppended);
    byte[] raw = Base64.encodeBase64(ivAppended);
    return new String(raw);
}

Example 23 with CBCBlockCipher

use of org.bouncycastle.crypto.modes.CBCBlockCipher in project spring-security by spring-projects.

the class BouncyCastleAesCbcBytesEncryptor method encrypt.

@Override
@SuppressWarnings("deprecation")
public byte[] encrypt(byte[] bytes) {
    byte[] iv = this.ivGenerator.generateKey();
    PaddedBufferedBlockCipher blockCipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new org.bouncycastle.crypto.engines.AESFastEngine()), new PKCS7Padding());
    blockCipher.init(true, new ParametersWithIV(this.secretKey, iv));
    byte[] encrypted = process(blockCipher, bytes);
    return (iv != null) ? EncodingUtils.concatenate(iv, encrypted) : encrypted;
}

Example 24 with CBCBlockCipher

use of org.bouncycastle.crypto.modes.CBCBlockCipher in project gocd by gocd.

the class DESEncrypter method encrypt.

private static String encrypt(byte[] key, String plainText) throws CryptoException {
    try {
        PaddedBufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new DESEngine()));
        KeyParameter keyParameter = new KeyParameter(key);
        cipher.init(true, keyParameter);
        byte[] plainTextBytes = plainText.getBytes();
        byte[] cipherTextBytes = new byte[cipher.getOutputSize(plainTextBytes.length)];
        int outputLength = cipher.processBytes(plainTextBytes, 0, plainTextBytes.length, cipherTextBytes, 0);
        cipher.doFinal(cipherTextBytes, outputLength);
        return ENCODER.encodeToString(cipherTextBytes).trim();
    } catch (Exception e) {
        throw new CryptoException(e);
    }
}