Package org.bouncycastle.crypto.params

Examples of org.bouncycastle.crypto.params.KeyParameter

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        }
       
        _forEncryption = forEncryption;
        _initialised = true;
       
        KeyParameter       p = (KeyParameter)params;
       
        setKey(p.getKey());
    }
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            kdf.generateBytes(K, 0, K.length);
            System.arraycopy(K, 0, K1, 0, K1.length);
            System.arraycopy(K, K1.length, K2, 0, K2.length);

            cipher.init(true, new KeyParameter(K1));
            C = new byte[cipher.getOutputSize(inLen)];
            len = cipher.processBytes(in, inOff, inLen, C, 0);
            len += cipher.doFinal(C, len);
        }


        // Convert the length of the encoding vector into a byte array.
        byte[] P2 = param.getEncodingV();
        byte[] L2 = new byte[4];
        if (V.length != 0 && P2 != null)
        {
            Pack.intToBigEndian(P2.length * 8, L2, 0);
        }


        // Apply the MAC.
        byte[] T = new byte[mac.getMacSize()];

        mac.init(new KeyParameter(K2));
        mac.update(C, 0, C.length);
        if (P2 != null)
        {
            mac.update(P2, 0, P2.length);
        }
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            kdf.generateBytes(K, 0, K.length);
            System.arraycopy(K, 0, K1, 0, K1.length);
            System.arraycopy(K, K1.length, K2, 0, K2.length);

            cipher.init(false, new KeyParameter(K1));

            M = new byte[cipher.getOutputSize(inLen - V.length - mac.getMacSize())];
            len = cipher.processBytes(in_enc, inOff + V.length, inLen - V.length - mac.getMacSize(), M, 0);
            len += cipher.doFinal(M, len);
        }


        // Convert the length of the encoding vector into a byte array.
        byte[] P2 = param.getEncodingV();
        byte[] L2 = new byte[4];
        if (V.length != 0 && P2 != null)
        {
            Pack.intToBigEndian(P2.length * 8, L2, 0);
        }


        // Verify the MAC.
        int end = inOff + inLen;
        byte[] T1 = Arrays.copyOfRange(in_enc, end - mac.getMacSize(), end);

        byte[] T2 = new byte[T1.length];
        mac.init(new KeyParameter(K2));
        mac.update(in_enc, inOff + V.length, inLen - V.length - T2.length);

        if (P2 != null)
        {
            mac.update(P2, 0, P2.length);
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  static String getCheckCode(String secret)
      throws Base32String.DecodingException {
    final byte[] keyBytes = Base32String.decode(secret);
    Mac mac = new HMac(new SHA1Digest());
    mac.init(new KeyParameter(keyBytes));
    PasscodeGenerator pcg = new PasscodeGenerator(mac);
    return pcg.generateResponseCode(0L);
  }
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   * java.lang.String)
   */
  protected byte[] createSignature(byte[] key, byte[] data) {
    SHA1Digest digest = new SHA1Digest();
    HMac mac = new HMac(digest);
    mac.init(new KeyParameter(key));
    mac.update(data, 0, data.length);
    byte[] b = new byte[digest.getDigestSize()];
    mac.doFinal(b, 0);
    return b;
  }
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   */
  public static String computePin(String secret, Long counter) {
    try {
      final byte[] keyBytes = Base32String.decode(secret);
      Mac mac = new HMac(new SHA1Digest());
      mac.init(new KeyParameter(keyBytes));
      PasscodeGenerator pcg = new PasscodeGenerator(mac);
      if (counter == null) { // time-based totp
        return pcg.generateTimeoutCode();
      } else { // counter-based hotp
        return pcg.generateResponseCode(counter.longValue());
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            throw new IllegalArgumentException(
                "VMPC-MAC Init parameters must include an IV");
        }

        ParametersWithIV ivParams = (ParametersWithIV) params;
        KeyParameter key = (KeyParameter) ivParams.getParameters();

        if (!(ivParams.getParameters() instanceof KeyParameter))
        {
            throw new IllegalArgumentException(
                "VMPC-MAC Init parameters must include a key");
        }

        this.workingIV = ivParams.getIV();

        if (workingIV == null || workingIV.length < 1 || workingIV.length > 768)
        {
            throw new IllegalArgumentException(
                "VMPC-MAC requires 1 to 768 bytes of IV");
        }

        this.workingKey = key.getKey();

        reset();

    }
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        /*
         * ISAAC encryption and decryption is completely
         * symmetrical, so the 'forEncryption' is
         * irrelevant.
         */
        KeyParameter p = (KeyParameter)params;
        setKey(p.getKey());
       
        return;
    }
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        // KeyParameter must contain a double or triple length DES key,
        // however the underlying cipher is a single DES. The middle and
        // right key are used only in the final step.

        KeyParameter kp = (KeyParameter)params;
        KeyParameter key1;
        byte[] keyvalue = kp.getKey();

        if (keyvalue.length == 16)
        { // Double length DES key
            key1 = new KeyParameter(keyvalue, 0, 8);
            this.lastKey2 = new KeyParameter(keyvalue, 8, 8);
            this.lastKey3 = key1;
        }
        else if (keyvalue.length == 24)
        { // Triple length DES key
            key1 = new KeyParameter(keyvalue, 0, 8);
            this.lastKey2 = new KeyParameter(keyvalue, 8, 8);
            this.lastKey3 = new KeyParameter(keyvalue, 16, 8);
        }
        else
        {
            throw new IllegalArgumentException(
                    "Key must be either 112 or 168 bit long");
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            throw new IllegalArgumentException(
                "VMPC init parameters must include an IV");
        }

        ParametersWithIV ivParams = (ParametersWithIV) params;
        KeyParameter key = (KeyParameter) ivParams.getParameters();

        if (!(ivParams.getParameters() instanceof KeyParameter))
        {
            throw new IllegalArgumentException(
                "VMPC init parameters must include a key");
        }

        this.workingIV = ivParams.getIV();

        if (workingIV == null || workingIV.length < 1 || workingIV.length > 768)
        {
            throw new IllegalArgumentException("VMPC requires 1 to 768 bytes of IV");
        }

        this.workingKey = key.getKey();

        initKey(this.workingKey, this.workingIV);
    }
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