org.bouncycastle.crypto.engines.ChaChaEngine Java Examples

The following examples show how to use org.bouncycastle.crypto.engines.ChaChaEngine. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: Chacha20Crypt.java    From shadowsocks-java with MIT License 5 votes vote down vote up 
@Override
protected StreamCipher getCipher(boolean isEncrypted) throws InvalidAlgorithmParameterException {
    if (_name.equals(CIPHER_CHACHA20)) {
        return new ChaChaEngine();
    }
    else if (_name.equals(CIPHER_CHACHA20_IETF)) {
        return new ChaCha7539Engine();
    }
    return null;
}
Example #2
Source File: Chacha20Crypt.java    From shadowsocks-android-java with Apache License 2.0 5 votes vote down vote up 
@Override
protected StreamCipher getCipher(boolean isEncrypted) throws InvalidAlgorithmParameterException {
	if (_name.equals(CIPHER_CHACHA20)) {
		return new ChaChaEngine();
	}
	else if (_name.equals(CIPHER_CHACHA20_IETF)) {
		return new ChaCha7539Engine();
	}
	return null;
}
Example #3
Source File: ChachaDecoder.java    From HAP-Java with MIT License 5 votes vote down vote up 
private KeyParameter initRecordMAC(ChaChaEngine cipher) {
  byte[] firstBlock = new byte[64];
  cipher.processBytes(firstBlock, 0, firstBlock.length, firstBlock, 0);

  // NOTE: The BC implementation puts 'r' after 'k'
  System.arraycopy(firstBlock, 0, firstBlock, 32, 16);
  KeyParameter macKey = new KeyParameter(firstBlock, 16, 32);
  Poly1305KeyGenerator.clamp(macKey.getKey());
  return macKey;
}
Example #4
Source File: ChachaEncoder.java    From HAP-Java with MIT License 5 votes vote down vote up 
private KeyParameter initRecordMAC(ChaChaEngine cipher) {
  byte[] firstBlock = new byte[64];
  cipher.processBytes(firstBlock, 0, firstBlock.length, firstBlock, 0);

  // NOTE: The BC implementation puts 'r' after 'k'
  System.arraycopy(firstBlock, 0, firstBlock, 32, 16);
  KeyParameter macKey = new KeyParameter(firstBlock, 16, 32);
  Poly1305KeyGenerator.clamp(macKey.getKey());
  return macKey;
}
Example #5
Source File: ChaCha20Encryptor.java    From archistar-smc with GNU Lesser General Public License v2.1 5 votes vote down vote up 
@Override
public byte[] encrypt(byte[] data, byte[] randomKeyBytes) throws IOException, InvalidKeyException,
        InvalidAlgorithmParameterException, InvalidCipherTextException {

    ChaChaEngine cipher = new ChaChaEngine();
    cipher.init(true, new ParametersWithIV(new KeyParameter(randomKeyBytes), randomIvBytes));

    byte[] result = new byte[data.length];
    cipher.processBytes(data, 0, data.length, result, 0);
    return result;
}
Example #6
Source File: ChaCha20Encryptor.java    From archistar-smc with GNU Lesser General Public License v2.1 5 votes vote down vote up 
@Override
public byte[] decrypt(byte[] data, byte[] randomKeyBytes)
        throws InvalidKeyException, InvalidAlgorithmParameterException, IOException,
        IllegalStateException, InvalidCipherTextException {

    ChaChaEngine cipher = new ChaChaEngine();
    cipher.init(false, new ParametersWithIV(new KeyParameter(randomKeyBytes), randomIvBytes));

    byte[] result = new byte[data.length];
    cipher.processBytes(data, 0, data.length, result, 0);
    return result;
}
Example #7
Source File: ChaCha20Encryptor.java    From archistar-smc with GNU Lesser General Public License v2.1 5 votes vote down vote up 
/**
 * Special method to decrypt partial data
 *
 * @param data to decrypt
 * @param randomKeyBytes key to use
 * @param startingByte the starting position within the (complete) data
 * @return decrypted data
 */
public byte[] decrypt(byte[] data, byte[] randomKeyBytes, long startingByte) {

    ChaChaEngine cipher = new ChaChaEngine();
    cipher.init(false, new ParametersWithIV(new KeyParameter(randomKeyBytes), randomIvBytes));
    cipher.skip(startingByte);
    byte[] result = new byte[data.length];
    cipher.processBytes(data, 0, data.length, result, 0);
    return result;
}
Example #8
Source File: ChachaDecoder.java    From HAP-Java with MIT License 2 votes vote down vote up 
public ChachaDecoder(byte[] key, byte[] nonce) throws IOException {

    this.decryptCipher = new ChaChaEngine(20);

    this.decryptCipher.init(false, new ParametersWithIV(new KeyParameter(key), nonce));
  }
Example #9
Source File: ChachaEncoder.java    From HAP-Java with MIT License 2 votes vote down vote up 
public ChachaEncoder(byte[] key, byte[] nonce) throws IOException {

    this.encryptCipher = new ChaChaEngine(20);

    this.encryptCipher.init(true, new ParametersWithIV(new KeyParameter(key), nonce));
  }