Example usage for org.bouncycastle.crypto.io CipherOutputStream write

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.io CipherOutputStream write.

Prototype

public void write(byte[] b) throws IOException 

Source Link

Document

Writes b.length bytes from the specified byte array to this output stream.

Usage

From source file:net.nharyes.secrete.curve.Curve25519PrivateKey.java

License:Open Source License

public void serialize(OutputStream out, char[] password) throws IOException {

    try {//ww  w.  j a  va2  s. co  m

        // generate initial vector
        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
        byte[] iv = new byte[16];
        random.nextBytes(iv);

        // generate salt
        byte[] salt = new byte[64];
        random.nextBytes(salt);

        // initialize cipher
        CipherParameters params = new ParametersWithIV(new KeyParameter(deriveKey(password, salt)), iv);
        BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()),
                new PKCS7Padding());
        cipher.reset();
        cipher.init(true, params);

        // write magic number
        out.write(MagicNumbers.PRIVATE_KEY);
        out.flush();

        // write initial vector and salt
        out.write(iv);
        out.write(salt);
        out.flush();

        // write encrypted key to output stream
        ByteArrayOutputStream buf = new ByteArrayOutputStream();
        CipherOutputStream cout = new CipherOutputStream(buf, cipher);
        cout.write(key);
        cout.close();
        out.write(buf.toByteArray());
        out.flush();

    } catch (UnsupportedEncodingException | NoSuchAlgorithmException ex) {

        throw new UnsupportedOperationException(ex.getMessage(), ex);
    }
}

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