Example usage for org.bouncycastle.crypto BlockCipher init

Introduction

In this page you can find the example usage for org.bouncycastle.crypto BlockCipher 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.file.FileStreamWriter.java

License:Open Source License

static InputStream decryptStream(InputStream in, XFileKey keyCipher) {
    BlockCipher cipher = keyCipher.ciphers().get();
    cipher.init(false, new KeyParameter(keyCipher.key()));
    return new CipherInputStream(in, new BufferedBlockCipher(cipher));
}

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From source file:com.hanhuy.keepassj.CompositeKey.java

License:Open Source License

public static long TransformKeyBenchmark(long uMilliseconds, long uStep) {
    long uRounds;

    // Try native method
    //         if(NativeLib.TransformKeyBenchmark256(uMilliseconds, out uRounds))
    //            return uRounds;

    byte[] pbKey = new byte[32];
    byte[] pbNewKey = new byte[32];
    for (int i = 0; i < pbKey.length; ++i) {
        pbKey[i] = (byte) i;
        pbNewKey[i] = (byte) i;
    }// w  w w .ja v a  2 s  .  c o m

    byte[] pbIV = new byte[16];
    Arrays.fill(pbIV, (byte) 0);
    try {
        BlockCipher engine = AesEngines.createAesEngine();
        engine.init(true, new KeyParameter(pbKey));

        if (engine.getBlockSize() != (128 / 8)) // AES block size
        {
            throw new RuntimeException();
        }

        uRounds = 0;
        long tStart = System.currentTimeMillis();
        while (true) {
            for (long j = 0; j < uStep; ++j) {
                engine.processBlock(pbNewKey, 0, pbNewKey, 0);
                engine.processBlock(pbNewKey, 16, pbNewKey, 16);
            }

            uRounds += uStep;
            if (uRounds < uStep) // Overflow check
            {
                uRounds = Long.MAX_VALUE;
                break;
            }

            long tElapsed = System.currentTimeMillis() - tStart;
            if (tElapsed > uMilliseconds)
                break;
        }

        return uRounds;
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

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From source file:com.skplanet.jose.jwa.crypto.CryptoUtils.java

License:Open Source License

public static byte[] aesGcmEncrypt(Transformation transformation, byte[] raw, byte[] secret, int atLength,
        byte[] iv, byte[] aad) throws Exception {
    BlockCipher blockCipher = new AESEngine();
    blockCipher.init(true, new KeyParameter(new SecretKeySpec(secret, "AES").getEncoded()));

    GCMBlockCipher aGCMBlockCipher = new GCMBlockCipher(blockCipher);
    aGCMBlockCipher.init(true, new AEADParameters(new KeyParameter(secret), atLength, iv, aad));

    int len = aGCMBlockCipher.getOutputSize(raw.length);
    byte[] out = new byte[len];
    int outOff = aGCMBlockCipher.processBytes(raw, 0, raw.length, out, 0);
    aGCMBlockCipher.doFinal(out, outOff);

    return out;// ww  w . jav  a 2  s .c  o  m
}

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From source file:com.skplanet.jose.jwa.crypto.CryptoUtils.java

License:Open Source License

public static byte[] aesGcmDecrypt(Transformation transformation, byte[] encryptedData, byte[] secret,
        int atLength, byte[] iv, byte[] aad) throws Exception {
    BlockCipher blockCipher = new AESEngine();
    blockCipher.init(false, new KeyParameter(new SecretKeySpec(secret, "AES").getEncoded()));

    GCMBlockCipher aGCMBlockCipher = new GCMBlockCipher(blockCipher);
    aGCMBlockCipher.init(false, new AEADParameters(new KeyParameter(secret), atLength, iv, aad));

    int len = aGCMBlockCipher.getOutputSize(encryptedData.length);
    byte[] out = new byte[len];
    int outOff = aGCMBlockCipher.processBytes(encryptedData, 0, encryptedData.length, out, 0);
    aGCMBlockCipher.doFinal(out, outOff);

    return out;//from   www  . j a  v a  2s. c  om
}

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From source file:de.tsenger.animamea.crypto.AmAESCrypto.java

License:Open Source License

/**
 * Dekodiert einen Block mit AES/*from   w w w  . j  a  va 2s . c  o  m*/
 * 
 * @param key
 *            Byte-Array enthlt den AES-Schlssel
 * @param z
 *            verschlsselter Block
 * @return entschlsselter block
 */
@Override
public byte[] decryptBlock(byte[] key, byte[] z) {
    byte[] s = new byte[blockSize];
    KeyParameter encKey = new KeyParameter(key);
    BlockCipher cipher = new AESFastEngine();
    cipher.init(false, encKey);
    cipher.processBlock(z, 0, s, 0);
    return s;
}

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From source file:de.tsenger.animamea.crypto.AmAESCrypto.java

License:Open Source License

/**
 * Kodiert einen Block mit AES/*from  w  w  w  .  jav  a2  s.  com*/
 * 
 * @param key
 *            Byte-Array enthlt den AES-Schlssel
 * @param z
 *            verschlsselter Block
 * @return entschlsselter block
 */

public byte[] encryptBlock(byte[] key, byte[] z) {
    byte[] s = new byte[blockSize];
    KeyParameter encKey = new KeyParameter(key);
    BlockCipher cipher = new AESFastEngine();
    cipher.init(true, encKey);
    cipher.processBlock(z, 0, s, 0);
    return s;
}

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From source file:de.tsenger.animamea.crypto.AmDESCrypto.java

License:Open Source License

/**
 * Dekodiert einen Block mit DES/*from  ww  w  .  j  av  a 2s  .c  om*/
 * 
 * @param key
 *            Byte-Array enthlt den 3DES-Schlssel
 * @param z
 *            verschlsselter Block
 * @return entschlsselter block
 */
@Override
public byte[] decryptBlock(byte[] key, byte[] z) {
    byte[] s = new byte[16];
    KeyParameter encKey = new KeyParameter(key);
    BlockCipher cipher = new DESedeEngine();
    cipher.init(false, encKey);
    cipher.processBlock(z, 0, s, 0);
    return s;
}

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From source file:gnu.java.zrtp.jmf.transform.srtp.SRTPCipherF8.java

License:LGPL

public static void deriveForIV(BlockCipher f8Cipher, byte[] key, byte[] salt) {
    /*/*from w  ww.ja v a  2 s .c o m*/
     * Get memory for the special key. This is the key to compute the
     * derived IV (IV').
     */
    byte[] saltMask = new byte[key.length];
    byte[] maskedKey = new byte[key.length];

    /*
     * First copy the salt into the mask field, then fill with 0x55 to get a
     * full key.
     */
    System.arraycopy(salt, 0, saltMask, 0, salt.length);
    for (int i = salt.length; i < saltMask.length; ++i)
        saltMask[i] = 0x55;

    /*
     * XOR the original key with the above created mask to get the special
     * key.
     */
    for (int i = 0; i < key.length; i++)
        maskedKey[i] = (byte) (key[i] ^ saltMask[i]);

    /*
     * Prepare the f8Cipher with the special key to compute IV'
     */
    KeyParameter encryptionKey = new KeyParameter(maskedKey);
    f8Cipher.init(true, encryptionKey);
    saltMask = null;
    maskedKey = null;
}

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From source file:jcrypter.JCrypterFrame.java

License:Apache License

/**
 * Test if the unlimited strength policy files are installed
 *//*w  w  w .j a v  a2s  .  c o m*/
private void testUnlimitedPolicy() {
    try {
        byte[] data = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };

        // create a 64 bit secret key from raw bytes

        byte[] key = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 }; //NOI18N

        byte[] out = new byte[256];

        // create a cipher and attempt to encrypt the data block with our key

        BlockCipher c = new BlowfishEngine();

        c.init(true, new KeyParameter(key));
        c.processBlock(data, 0, out, 0);
        c.reset();

        // create a 192 bit secret key from raw bytes

        SecretKey key192 = new SecretKeySpec(new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
                0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17 },
                "Blowfish"); //NOI18N

        // now try encrypting with the larger key

        c.init(true, new KeyParameter(out));
        c.processBlock(data, 0, out, 0);
        //If no exception is thrown before
        System.out.println(i18n.getString("Unrestricted_policy_test:_passed"));
    }
    /*catch (InvalidKeyException ex)
    {
    JOptionPane.showMessageDialog(this, i18n.getString("The_Unrestricted_Policy_Files_are_not_installed_in_your_JRE.") +
            i18n.getString("Please_install_them_to_enable_strong_cryptography!"), i18n.getString("Restricted_policy_files"),
            JOptionPane.ERROR_MESSAGE);
    }*/
    catch (Exception ex) {
        Logger.getLogger(JCrypterFrame.class.getName()).log(Level.SEVERE, null, ex);
    }
}

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From source file:org.cryptomator.crypto.aes256.AesSivCipherUtil.java

License:Open Source License

static byte[] sivEncrypt(byte[] aesKey, byte[] macKey, byte[] plaintext, byte[]... additionalData)
        throws InvalidKeyException {
    if (aesKey.length != 16 && aesKey.length != 24 && aesKey.length != 32) {
        throw new InvalidKeyException("Invalid aesKey length " + aesKey.length);
    }//from   w  w  w  .j a v  a 2 s . c o  m

    final byte[] iv = s2v(macKey, plaintext, additionalData);

    final int numBlocks = (plaintext.length + 15) / 16;

    // clear out the 31st and 63rd (rightmost) bit:
    final byte[] ctr = Arrays.copyOf(iv, 16);
    ctr[8] = (byte) (ctr[8] & 0x7F);
    ctr[12] = (byte) (ctr[12] & 0x7F);
    final ByteBuffer ctrBuf = ByteBuffer.wrap(ctr);
    final long initialCtrVal = ctrBuf.getLong(8);

    final byte[] x = new byte[numBlocks * 16];
    final BlockCipher aes = new AESFastEngine();
    aes.init(true, new KeyParameter(aesKey));
    for (int i = 0; i < numBlocks; i++) {
        final long ctrVal = initialCtrVal + i;
        ctrBuf.putLong(8, ctrVal);
        aes.processBlock(ctrBuf.array(), 0, x, i * 16);
        aes.reset();
    }

    final byte[] ciphertext = xor(plaintext, x);

    return ArrayUtils.addAll(iv, ciphertext);
}

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