Example usage for org.bouncycastle.crypto StreamBlockCipher init

Introduction

In this page you can find the example usage for org.bouncycastle.crypto StreamBlockCipher init.

Prototype

public void init(boolean forEncryption, CipherParameters params) throws IllegalArgumentException;

Source Link

Document

Initialise the cipher.

Usage

From source file:com.github.horrorho.inflatabledonkey.chunk.engine.ChunkDecrypters.java

License:Open Source License

public static Optional<byte[]> decrypt(byte[] key, StreamBlockCipher cipher, byte[] data, int offset,
        int length) {
    try {/* ww  w . j  a  v a  2s .c  o m*/
        KeyParameter keyParameter = new KeyParameter(key);
        cipher.init(false, keyParameter);
        byte[] decrypted = new byte[length];
        cipher.processBytes(data, offset, length, decrypted, 0);
        return Optional.of(decrypted);

    } catch (DataLengthException ex) {
        logger.warn("-- decrypt() - exception: ", ex);
        return Optional.empty();
    }
}

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From source file:shadowsocks.crypto.AESCrypto.java

License:Apache License

@Override
protected StreamCipher createCipher(byte[] iv, boolean encrypt) throws CryptoException {
    StreamBlockCipher c = getCipher(encrypt);
    ParametersWithIV parameterIV = new ParametersWithIV(new KeyParameter(mKey), iv, 0, mIVLength);
    c.init(encrypt, parameterIV);
    return c;/*from www  .ja va2  s. c  o m*/
}

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