Example usage for org.bouncycastle.crypto BufferedBlockCipher doFinal

Introduction

In this page you can find the example usage for org.bouncycastle.crypto BufferedBlockCipher doFinal.

Prototype

public int doFinal(byte[] out, int outOff)
        throws DataLengthException, IllegalStateException, InvalidCipherTextException 

Source Link

Document

Process the last block in the buffer.

Usage

From source file:ch.dissem.bitmessage.cryptography.bc.BouncyCryptography.java

License:Apache License

@Override
public byte[] crypt(boolean encrypt, byte[] data, byte[] key_e, byte[] initializationVector) {
    BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()),
            new PKCS7Padding());
    CipherParameters params = new ParametersWithIV(new KeyParameter(key_e), initializationVector);

    cipher.init(encrypt, params);//from  w  w  w  .j  a  v  a 2s.c om

    byte[] buffer = new byte[cipher.getOutputSize(data.length)];
    int length = cipher.processBytes(data, 0, data.length, buffer, 0);
    try {
        length += cipher.doFinal(buffer, length);
    } catch (InvalidCipherTextException e) {
        throw new IllegalArgumentException(e);
    }
    if (length < buffer.length) {
        return Arrays.copyOfRange(buffer, 0, length);
    }
    return buffer;
}

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From source file:co.rsk.crypto.KeyCrypterAes.java

License:Open Source License

/**
 * Password based encryption using AES - CBC 256 bits.
 *//* w  w w . ja  va  2  s.c o m*/
@Override
public EncryptedData encrypt(byte[] plainBytes, KeyParameter key) {
    checkNotNull(plainBytes);
    checkNotNull(key);

    try {
        // Generate iv - each encryption call has a different iv.
        byte[] iv = new byte[BLOCK_LENGTH];
        secureRandom.nextBytes(iv);

        ParametersWithIV keyWithIv = new ParametersWithIV(key, iv);

        // Encrypt using AES.
        BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));
        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 KeyCrypterException("Could not encrypt bytes.", e);
    }
}

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From source file:co.rsk.crypto.KeyCrypterAes.java

License:Open Source License

/**
 * Decrypt bytes previously encrypted with this class.
 *
 * @param dataToDecrypt    The data to decrypt
 * @param key              The AES key to use for decryption
 * @return                 The decrypted bytes
 * @throws                 KeyCrypterException if bytes could not be decrypted
 *///w w w.  ja v a 2s.com
@Override
public byte[] decrypt(EncryptedData dataToDecrypt, KeyParameter key) {
    checkNotNull(dataToDecrypt);
    checkNotNull(key);

    try {
        ParametersWithIV keyWithIv = new ParametersWithIV(new KeyParameter(key.getKey()),
                dataToDecrypt.initialisationVector);

        // Decrypt the message.
        BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));
        cipher.init(false, keyWithIv);

        byte[] cipherBytes = dataToDecrypt.encryptedBytes;
        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 KeyCrypterException("Could not decrypt bytes", e);
    }
}

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From source file:cologne.eck.dr.op.crypto.password_hashing.Battcrypt_v0.java

License:Open Source License

@Override
public byte[] hashPassword(int outlen, byte[] in, byte[] salt, int t_cost, int m_cost, Object... varArgs)
        throws DataLengthException, IllegalStateException, InvalidCipherTextException {

    SHA512Digest sha = new SHA512Digest();
    int[] data = new int[DATA_SIZE_INT];
    BlowfishEngine blowfish;//from   w ww .  ja  v a2  s.  c  om
    long upgradeLoops = 1;
    long loops;
    int memSize = 4 << m_cost;//= 4 * 2 ** m_cost
    int memMask = memSize - 1;
    int[] mem;

    byte[] hashBuffer = new byte[HASH_LENGTH_BYTE];// holds hash value as bytes
    byte[] dataBuffer = new byte[DATA_SIZE_BYTE];// holds encrypted bytes

    // These are the PHP max. values 
    if (m_cost > 18 || // maximum: 2.147.483.648 bytes
            (t_cost & 0xffff) > 62 || (t_cost >> 16) > 63 || outlen > HASH_LENGTH_BYTE) {
        throw new IllegalArgumentException("invalid parameters");
    }

    int tmp = t_cost >> 16;

    if (tmp != 0) {
        // upgradeLoops = 1, 2, 3, 4, 6, 8, 12, 16, ...
        upgradeLoops = (long) (3 - (tmp & 1)) << ((tmp - 1) >> 1);
    }

    // loops = 2, 3, 4, 6, 8, 12, 16, ...
    tmp = t_cost & 0xffff;
    loops = (long) ((tmp & 1) + 2) << (tmp >> 1);

    // key = SHA512(SHA512(salt) || in)
    byte[] keyBytes = new byte[HASH_LENGTH_BYTE];
    sha.update(salt, 0, salt.length);
    sha.doFinal(keyBytes, 0);
    sha.reset();
    sha.update(keyBytes, 0, HASH_LENGTH_BYTE);
    sha.update(in, 0, in.length);//password
    sha.doFinal(keyBytes, 0);
    sha.reset();
    if (wipePassword == true) {
        Arrays.fill(in, (byte) 0);
    }

    // initialize cipher with 448 bit (56 byte) key: 
    // truncate keyBytes:
    byte[] blowfishKey = new byte[56];
    System.arraycopy(keyBytes, 0, blowfishKey, 0, 56);
    // use zeros as IV
    byte[] iv = new byte[IV_LENGTH_BYTE];
    KeyParameter params = new KeyParameter(blowfishKey);
    Arrays.fill(blowfishKey, (byte) 0);
    ParametersWithIV ivParams = new ParametersWithIV(params, iv);
    blowfish = new BlowfishEngine();
    // CBC, no padding: all vectors are multiples of Blowfish block length
    BufferedBlockCipher cipher = new BufferedBlockCipher(new CBCBlockCipher(blowfish));
    cipher.init(true, ivParams);

    // initialize memory-hard vector:
    mem = new int[DATA_SIZE_INT * memSize];

    for (long u = 0; u < upgradeLoops; u++) {

        // initialize data:
        // data = SHA512(BIG_ENDIAN_64( 0) || key) || ...
        // ... || SHA512(BIG_ENDIAN_64(31) || key)         
        byte[] counterBytesBE = new byte[8]; // holds counter as long to update
        for (int i = 0; i < DATA_SIZE_BYTE / HASH_LENGTH_BYTE; i++) {

            counterBytesBE[7] = (byte) i; // set first byte
            sha.update(counterBytesBE, 0, counterBytesBE.length); // BIG_ENDIAN_64(i)
            sha.update(keyBytes, 0, HASH_LENGTH_BYTE);
            sha.doFinal(hashBuffer, 0);
            sha.reset();
            // hash values allow weak garbage collector attack - 
            // so, avoid new allocations:             
            for (int j = 0; j < HASH_LENGTH_BYTE / 4; j++) {
                data[HASH_LENGTH_INT * i + j] = ((hashBuffer[j * 4 + 3] & 0xFF) << 24)
                        | ((hashBuffer[j * 4 + 2] & 0xFF) << 16) | ((hashBuffer[j * 4 + 1] & 0xFF) << 8)
                        | (hashBuffer[j * 4 + 0] & 0xFF); // little endian order
            }
            Arrays.fill(hashBuffer, (byte) 0);
        }

        // Initialize memory:
        for (int i = 0; i < memSize; i++) {
            // data = blowfish_encrypt_cbc(data)
            // mem = mem || data            
            for (int j = 0; j < DATA_SIZE_INT; j++) {
                dataBuffer[j * 4 + 0] = (byte) (data[j]);// little endian
                dataBuffer[j * 4 + 1] = (byte) (data[j] >>> 8);
                dataBuffer[j * 4 + 2] = (byte) (data[j] >>> 16);
                dataBuffer[j * 4 + 3] = (byte) (data[j] >>> 24);
            }
            int len = cipher.processBytes(dataBuffer, 0, DATA_SIZE_BYTE, dataBuffer, 0);
            cipher.doFinal(dataBuffer, len);
            cipher.reset();

            // get iv for next encryption step:
            // "running CBC": the last block of the
            //  previous call is the IV for the next call
            System.arraycopy(dataBuffer, DATA_SIZE_BYTE - IV_LENGTH_BYTE, iv, 0, IV_LENGTH_BYTE);
            ivParams = new ParametersWithIV(params, iv);
            cipher.init(true, ivParams);

            for (int j = 0; j < DATA_SIZE_INT; j++) {
                data[j] = ((dataBuffer[j * 4 + 3] & 0xFF) << 24) | ((dataBuffer[j * 4 + 2] & 0xFF) << 16)
                        | ((dataBuffer[j * 4 + 1] & 0xFF) << 8) | (dataBuffer[j * 4 + 0] & 0xFF); // little endian order
            }
            System.arraycopy(data, 0, mem, DATA_SIZE_INT * i, DATA_SIZE_INT);
        }

        // encrypt data:
        for (int j = 0; j < DATA_SIZE_INT; j++) {
            dataBuffer[j * 4 + 0] = (byte) (data[j]);// little endian
            dataBuffer[j * 4 + 1] = (byte) (data[j] >>> 8);
            dataBuffer[j * 4 + 2] = (byte) (data[j] >>> 16);
            dataBuffer[j * 4 + 3] = (byte) (data[j] >>> 24);
        }
        int len = cipher.processBytes(dataBuffer, 0, DATA_SIZE_BYTE, dataBuffer, 0);
        cipher.doFinal(dataBuffer, len);
        cipher.reset();
        System.arraycopy(dataBuffer, DATA_SIZE_BYTE - IV_LENGTH_BYTE, iv, 0, IV_LENGTH_BYTE);
        ivParams = new ParametersWithIV(params, iv);
        cipher.init(true, ivParams);

        for (int j = 0; j < DATA_SIZE_INT; j++) {
            data[j] = ((dataBuffer[j * 4 + 3] & 0xFF) << 24) | ((dataBuffer[j * 4 + 2] & 0xFF) << 16)
                    | ((dataBuffer[j * 4 + 1] & 0xFF) << 8) | (dataBuffer[j * 4 + 0] & 0xFF); // little endian order
        }

        // work:
        for (long i = 0; i < loops; i++) {
            for (int j = 0; j < memSize; j++) {
                // in the C++ reference implementation and the paper 
                // this rValue a 64 bit integer, but this makes only a
                // difference for memSize > 0xFFFFFFFF +1, while the
                // recommended maximum for memSize is 2^32
                int rValue = ((((int) data[DATA_SIZE_INT - 1]) << 24) & 0xff000000)
                        | ((((int) data[DATA_SIZE_INT - 1]) << 8) & 0x00ff0000)
                        | ((((int) data[DATA_SIZE_INT - 1]) >>> 8) & 0x0000ff00)
                        | ((((int) data[DATA_SIZE_INT - 1]) >>> 24) & 0x000000ff);
                int index = (int) (DATA_SIZE_INT * (rValue & memMask));

                for (int k = 0; k < DATA_SIZE_INT; k++) {
                    mem[j * DATA_SIZE_INT + k] ^= data[k] ^ mem[index + k];
                }

                // convert to byte: 
                for (int k = 0; k < DATA_SIZE_INT; k++) {
                    dataBuffer[k * 4 + 0] = (byte) (mem[j * DATA_SIZE_INT + k]);
                    dataBuffer[k * 4 + 1] = (byte) (mem[j * DATA_SIZE_INT + k] >>> 8);
                    dataBuffer[k * 4 + 2] = (byte) (mem[j * DATA_SIZE_INT + k] >>> 16);
                    dataBuffer[k * 4 + 3] = (byte) (mem[j * DATA_SIZE_INT + k] >>> 24);
                }
                int len1 = cipher.processBytes(dataBuffer, 0, DATA_SIZE_BYTE, dataBuffer, 0);

                cipher.doFinal(dataBuffer, len1);
                cipher.reset();
                // get iv for next step:
                System.arraycopy(dataBuffer, DATA_SIZE_BYTE - IV_LENGTH_BYTE, iv, 0, IV_LENGTH_BYTE);

                for (int k = 0; k < DATA_SIZE_INT; k++) {
                    mem[j * DATA_SIZE_INT + k] = ((dataBuffer[k * 4 + 3] & 0xFF) << 24)
                            | ((dataBuffer[k * 4 + 2] & 0xFF) << 16) | ((dataBuffer[k * 4 + 1] & 0xFF) << 8)
                            | (dataBuffer[k * 4 + 0] & 0xFF); // little endian order
                }

                ivParams = new ParametersWithIV(params, iv);
                cipher.init(true, ivParams);

                // data ^= mem[j]
                for (int k = 0; k < DATA_SIZE_INT; k++) {
                    data[k] ^= mem[DATA_SIZE_INT * j + k];
                }
            }
        }
        // Finish
        // key = truncate(SHA512(SHA512(data || key)), outlen) || zeros(HASH_LENGTH - outlen)
        // convert to byte: 
        for (int k = 0; k < DATA_SIZE_INT; k++) {
            dataBuffer[k * 4 + 0] = (byte) (data[k]);
            dataBuffer[k * 4 + 1] = (byte) (data[k] >>> 8);
            dataBuffer[k * 4 + 2] = (byte) (data[k] >>> 16);
            dataBuffer[k * 4 + 3] = (byte) (data[k] >>> 24);
        }
        sha.update(dataBuffer, 0, DATA_SIZE_BYTE);
        sha.update(keyBytes, 0, HASH_LENGTH_BYTE);
        sha.doFinal(keyBytes, 0);
        sha.reset();
    }

    sha.update(keyBytes, 0, HASH_LENGTH_BYTE);
    sha.doFinal(keyBytes, 0);
    sha.reset();

    byte[] out = new byte[outlen];

    System.arraycopy(keyBytes, 0, out, 0, out.length);

    // Clean-up:
    Arrays.fill(keyBytes, (byte) 0);
    Arrays.fill(dataBuffer, (byte) 0);
    Arrays.fill(iv, (byte) 0);
    Arrays.fill(data, 0);
    Arrays.fill(mem, (byte) 0);

    // wipe the key from parameters
    Arrays.fill(params.getKey(), (byte) 0);

    // prevent dead code eliminations (compiler optimizations):
    if ((keyBytes[HASH_LENGTH_BYTE - 1] | blowfishKey[blowfishKey.length - 1] | dataBuffer[DATA_SIZE_BYTE - 1]
            | hashBuffer[HASH_LENGTH_BYTE - 1] | data[DATA_SIZE_INT - 1] | iv[IV_LENGTH_BYTE - 1]
            | mem[mem.length - 1] | params.getKey()[params.getKey().length - 1]) != 0) {
        System.err.print("zeroization failed!");
    }
    if ((wipePassword == true) && (in[in.length - 1] != 0)) {
        System.err.print("zeroization failed!");
    }
    return out;
}

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From source file:cologne.eck.peafactory.crypto.CipherStuff.java

License:Open Source License

/**
 * Encrypt/decrypt an array of bytes. This function is only used to 
 * encrypt the session key/*from ww w  .ja  va 2s.c o m*/
 * 
 * @param forEncryption - true for encryption, false for decryption
 * @param input         - plain text or cipher text
 * @param key         - the cryptographic key for the cipher
 * @param zeroize      - fills the key with 0 for true (when the key is no longer used)
 * @return            - plain text or cipher text
 */
public final static byte[] processCTR(boolean forEncryption, byte[] input, byte[] key, boolean zeroize) {
    //Help.printBytes("key",  input);
    KeyParameter kp = new KeyParameter(key);
    if (zeroize == true) {
        Zeroizer.zero(key);
    }

    byte[] iv = null;

    if (forEncryption == false) {
        // input is ciphertext, IV is stored on top of ciphertext
        // get IV:
        iv = new byte[CipherStuff.getCipherAlgo().getBlockSize()];
        System.arraycopy(input, 0, iv, 0, iv.length);
        // truncate ciphertext:
        byte[] tmp = new byte[input.length - iv.length];
        System.arraycopy(input, iv.length, tmp, 0, tmp.length);
        input = tmp;
    } else {
        // input is plaintext
        iv = new RandomStuff().createRandomBytes(CipherStuff.getCipherAlgo().getBlockSize());
    }
    ParametersWithIV ivp = new ParametersWithIV(kp, iv);

    BufferedBlockCipher b = new BufferedBlockCipher(new SICBlockCipher(cipherAlgo));

    b.init(true, ivp);
    byte[] out = new byte[input.length];

    int len = b.processBytes(input, 0, input.length, out, 0);

    try {
        len += b.doFinal(out, len);
    } catch (DataLengthException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalStateException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (InvalidCipherTextException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    Zeroizer.zero(kp.getKey());

    if (forEncryption == false) {// decryption: output plaintext
        return out;
    } else { // encryption: output (IV || ciphertext)
        Zeroizer.zero(input);
        // store IV on top of ciphertext
        byte[] tmp = new byte[out.length + iv.length];
        System.arraycopy(iv, 0, tmp, 0, iv.length);
        System.arraycopy(out, 0, tmp, iv.length, out.length);
        return tmp;
    }
}

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From source file:com.android.isoma.enc.Encryption.java

License:Open Source License

public byte[] callCipher(BufferedBlockCipher cipher, byte[] data)
        throws DataLengthException, IllegalStateException, InvalidCipherTextException {
    int size = cipher.getOutputSize(data.length);
    byte[] result = new byte[size];
    int olen = cipher.processBytes(data, 0, data.length, result, 0);

    int last = cipher.doFinal(result, olen);

    final byte[] plain = new byte[olen + last];
    System.arraycopy(result, 0, plain, 0, plain.length);
    // cipher.reset();
    return plain;

}

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From source file:com.completetrsst.crypto.Crypto.java

License:Apache License

private static byte[] process(byte[] input, BufferedBlockCipher bufferedBlockCipher,
        CipherParameters cipherParameters, boolean forEncryption) throws InvalidCipherTextException {
    bufferedBlockCipher.init(forEncryption, cipherParameters);

    int inputOffset = 0;
    int inputLength = input.length;

    int maximumOutputLength = bufferedBlockCipher.getOutputSize(inputLength);
    byte[] output = new byte[maximumOutputLength];
    int outputOffset = 0;
    int outputLength = 0;

    int bytesProcessed;

    bytesProcessed = bufferedBlockCipher.processBytes(input, inputOffset, inputLength, output, outputOffset);
    outputOffset += bytesProcessed;/*w  w  w .j a v  a2s .co m*/
    outputLength += bytesProcessed;

    bytesProcessed = bufferedBlockCipher.doFinal(output, outputOffset);
    outputOffset += bytesProcessed;
    outputLength += bytesProcessed;

    if (outputLength == output.length) {
        return output;
    } else {
        byte[] truncatedOutput = new byte[outputLength];
        System.arraycopy(output, 0, truncatedOutput, 0, outputLength);
        return truncatedOutput;
    }
}

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From source file:com.foilen.smalltools.crypt.AbstractBufferedBlockCipherCrypt.java

License:Open Source License

private byte[] finalize(BufferedBlockCipher bufferedBlockCipher, byte[] out, int outOff)
        throws DataLengthException, IllegalStateException, InvalidCipherTextException {
    outOff += bufferedBlockCipher.doFinal(out, outOff);
    if (outOff != out.length) {
        out = Arrays.copyOfRange(out, 0, outOff);
    }/*from   w  w  w. ja  v a 2 s.  co  m*/
    return out;
}

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From source file:com.giacomodrago.immediatecrypt.aes.AESFacadeImpl.java

License:Open Source License

@Override
public AESEncryptedMessage encrypt(byte[] plaintext, String password) throws EncryptionException {

    // Check password is not empty
    if (password.isEmpty()) {
        throw new EncryptionException("Password is empty.");
    }//from w w  w . j a  v  a2s  .  c om

    // Generate random password salt
    String salt = RandomStringUtils.randomAlphanumeric(SALT_LENGTH);

    ParametersWithIV params = createEncryptionParameters(password, salt);
    byte[] iv = params.getIV();

    BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));

    cipher.init(true, params);

    byte[] ciphertext = new byte[cipher.getOutputSize(plaintext.length)];

    int outputLen = cipher.processBytes(plaintext, 0, plaintext.length, ciphertext, 0);
    try {
        cipher.doFinal(ciphertext, outputLen);
    } catch (DataLengthException ex) {
        throw new EncryptionException(ex);
    } catch (IllegalStateException ex) {
        throw new EncryptionException(ex);
    } catch (InvalidCipherTextException ex) {
        throw new EncryptionException(ex);
    }

    return new AESEncryptedMessage(salt, iv, ciphertext);

}

---

From source file:com.giacomodrago.immediatecrypt.aes.AESFacadeImpl.java

License:Open Source License

@Override
public byte[] decrypt(AESEncryptedMessage encryptedMessage, String password) throws EncryptionException {

    byte[] ciphertext = encryptedMessage.getCiphertext();
    String salt = encryptedMessage.getSalt();
    byte[] iv = encryptedMessage.getIv();

    ParametersWithIV params = createDecryptionParameters(password, salt, iv);

    BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));

    try {/* w w w .ja va2  s. c o m*/
        cipher.init(false, params);
    } catch (IllegalArgumentException ex) {
        throw new EncryptionException(ex);
    }

    byte[] plaintext = new byte[cipher.getOutputSize(ciphertext.length)];

    int outputLen = cipher.processBytes(ciphertext, 0, ciphertext.length, plaintext, 0);
    try {
        cipher.doFinal(plaintext, outputLen);
    } catch (DataLengthException ex) {
        throw new EncryptionException(ex);
    } catch (IllegalStateException ex) {
        throw new EncryptionException(ex);
    } catch (InvalidCipherTextException ex) {
        throw new EncryptionException(ex);
    }

    return plaintext;

}

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