Examples of org.bouncycastle.crypto.Mac

org.bouncycastle.crypto.Mac
The base interface for implementations of message authentication codes (MACs).

  private String mUser;


  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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   *           If the key string is improperly encoded.
   */
  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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        return out;
    }
    
    private int calculateMac(byte[] data, int dataOff, int dataLen, byte[] macBlock)
    {
        Mac    cMac = new CBCBlockCipherMac(cipher, macSize * 8);


        cMac.init(keyParam);


        //
        // build b0
        //
        byte[] b0 = new byte[16];
    
        if (hasAssociatedText())
        {
            b0[0] |= 0x40;
        }
        
        b0[0] |= (((cMac.getMacSize() - 2) / 2) & 0x7) << 3;


        b0[0] |= ((15 - nonce.length) - 1) & 0x7;
        
        System.arraycopy(nonce, 0, b0, 1, nonce.length);
        
        int q = dataLen;
        int count = 1;
        while (q > 0)
        {
            b0[b0.length - count] = (byte)(q & 0xff);
            q >>>= 8;
            count++;
        }
        
        cMac.update(b0, 0, b0.length);
        
        //
        // process associated text
        //
        if (hasAssociatedText())
        {
            int extra;
            
            if (associatedText.length < ((1 << 16) - (1 << 8)))
            {
                cMac.update((byte)(associatedText.length >> 8));
                cMac.update((byte)associatedText.length);
                
                extra = 2;
            }
            else // can't go any higher than 2^32
            {
                cMac.update((byte)0xff);
                cMac.update((byte)0xfe);
                cMac.update((byte)(associatedText.length >> 24));
                cMac.update((byte)(associatedText.length >> 16));
                cMac.update((byte)(associatedText.length >> 8));
                cMac.update((byte)associatedText.length);
                
                extra = 6;
            }
            
            cMac.update(associatedText, 0, associatedText.length);
            
            extra = (extra + associatedText.length) % 16;
            if (extra != 0)
            {
                for (int i = 0; i != 16 - extra; i++)
                {
                    cMac.update((byte)0x00);
                }
            }
        }
        
        //
        // add the text
        //
        cMac.update(data, dataOff, dataLen);


        return cMac.doFinal(macBlock, 0);
    }

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    public TestResult perform()
    {
        KeyParameter        key = new KeyParameter(keyBytes);
        BlockCipher         cipher = new DESEngine();
        Mac                 mac = new CBCBlockCipherMac(cipher);


        //
        // standard DAC - zero IV
        //
        mac.init(key);


        mac.update(input1, 0, input1.length);


        byte[]  out = new byte[4];


        mac.doFinal(out, 0);


        if (!arraysEqual(out, output1))
        {
            return new SimpleTestResult(false, getName() + ": Failed - expected " + new String(Hex.encode(output1)) + " got " + new String(Hex.encode(out)));
        }
        
        //
        // mac with IV.
        //
        ParametersWithIV    param = new ParametersWithIV(key, ivBytes);


        mac.init(param);


        mac.update(input1, 0, input1.length);


        out = new byte[4];


        mac.doFinal(out, 0);


        if (!arraysEqual(out, output2))
        {
            return new SimpleTestResult(false, getName() + ": Failed - expected " + new String(Hex.encode(output2)) + " got " + new String(Hex.encode(out)));
        }
        
        //
        // CFB mac with IV - 8 bit CFB mode
        //
        param = new ParametersWithIV(key, ivBytes);


        mac = new CFBBlockCipherMac(cipher);


        mac.init(param);


        mac.update(input1, 0, input1.length);


        out = new byte[4];


        mac.doFinal(out, 0);


        if (!arraysEqual(out, output3))
        {
            return new SimpleTestResult(false, getName() + ": Failed - expected " + new String(Hex.encode(output3)) + " got " + new String(Hex.encode(out)));
        }


        //
        // word aligned data - zero IV
        //
        mac.init(key);


        mac.update(input2, 0, input2.length);


        out = new byte[4];


        mac.doFinal(out, 0);


        if (!arraysEqual(out, output4))
        {
            return new SimpleTestResult(false, getName() + ": Failed - expected " + new String(Hex.encode(output4)) + " got " + new String(Hex.encode(out)));
        }


        //
        // word aligned data - zero IV - CBC padding
        //
        mac = new CBCBlockCipherMac(cipher, new PKCS7Padding());


        mac.init(key);


        mac.update(input2, 0, input2.length);


        out = new byte[4];


        mac.doFinal(out, 0);


        if (!arraysEqual(out, output5))
        {
            return new SimpleTestResult(false, getName() + ": Failed - expected " + new String(Hex.encode(output5)) + " got " + new String(Hex.encode(out)));
        }


        //
        // non-word aligned data - zero IV - CBC padding
        //
        mac.reset();


        mac.update(input1, 0, input1.length);


        out = new byte[4];


        mac.doFinal(out, 0);


        if (!arraysEqual(out, output6))
        {
            return new SimpleTestResult(false, getName() + ": Failed - expected " + new String(Hex.encode(output6)) + " got " + new String(Hex.encode(out)));
        }


        //
        // non-word aligned data - zero IV - CBC padding
        //
        mac.init(key);


        mac.update(input1, 0, input1.length);


        out = new byte[4];


        mac.doFinal(out, 0);


        if (!arraysEqual(out, output6))
        {
            return new SimpleTestResult(false, getName() + ": Failed - expected " + new String(Hex.encode(output6)) + " got " + new String(Hex.encode(out)));
        }

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        return output;
    }


    private int calculateMac(byte[] data, int dataOff, int dataLen, byte[] macBlock)
    {
        Mac cMac = new CBCBlockCipherMac(cipher, macSize * 8);


        cMac.init(keyParam);


        //
        // build b0
        //
        byte[] b0 = new byte[16];
    
        if (hasAssociatedText())
        {
            b0[0] |= 0x40;
        }
        
        b0[0] |= (((cMac.getMacSize() - 2) / 2) & 0x7) << 3;


        b0[0] |= ((15 - nonce.length) - 1) & 0x7;
        
        System.arraycopy(nonce, 0, b0, 1, nonce.length);
        
        int q = dataLen;
        int count = 1;
        while (q > 0)
        {
            b0[b0.length - count] = (byte)(q & 0xff);
            q >>>= 8;
            count++;
        }
        
        cMac.update(b0, 0, b0.length);
        
        //
        // process associated text
        //
        if (hasAssociatedText())
        {
            int extra;
            
            int textLength = getAssociatedTextLength();
            if (textLength < ((1 << 16) - (1 << 8)))
            {
                cMac.update((byte)(textLength >> 8));
                cMac.update((byte)textLength);
                
                extra = 2;
            }
            else // can't go any higher than 2^32
            {
                cMac.update((byte)0xff);
                cMac.update((byte)0xfe);
                cMac.update((byte)(textLength >> 24));
                cMac.update((byte)(textLength >> 16));
                cMac.update((byte)(textLength >> 8));
                cMac.update((byte)textLength);
                
                extra = 6;
            }


            if (initialAssociatedText != null)
            {
                cMac.update(initialAssociatedText, 0, initialAssociatedText.length);
            }
            if (associatedText.size() > 0)
            {
                byte[] tmp = associatedText.toByteArray();
                cMac.update(tmp, 0, tmp.length);
            }


            extra = (extra + textLength) % 16;
            if (extra != 0)
            {
                for (int i = extra; i != 16; i++)
                {
                    cMac.update((byte)0x00);
                }
            }
        }
 
        //
        // add the text
        //
        cMac.update(data, dataOff, dataLen);


        return cMac.doFinal(macBlock, 0);
    }

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        return out;
    }
    
    private int calculateMac(byte[] data, int dataOff, int dataLen, byte[] macBlock)
    {
        Mac    cMac = new CBCBlockCipherMac(cipher, params.getMacSize());


        byte[] nonce = params.getNonce();
        byte[] associatedText = params.getAssociatedText();
        
        cMac.init(params.getKey());


        //
        // build b0
        //
        byte[] b0 = new byte[16];
    
        if (associatedText != null && associatedText.length != 0)
        {
            b0[0] |= 0x40;
        }
        
        b0[0] |= (((cMac.getMacSize() - 2) / 2) & 0x7) << 3;


        b0[0] |= ((15 - nonce.length) - 1) & 0x7;
        
        System.arraycopy(nonce, 0, b0, 1, nonce.length);
        
        int q = dataLen;
        int count = 1;
        while (q > 0)
        {
            b0[b0.length - count] = (byte)(q & 0xff);
            q >>>= 8;
            count++;
        }
        
        cMac.update(b0, 0, b0.length);
        
        //
        // process associated text
        //
        if (associatedText != null)
        {
            int extra;
            
            if (associatedText.length < ((1 << 16) - (1 << 8)))
            {
                cMac.update((byte)(associatedText.length >> 8));
                cMac.update((byte)associatedText.length);
                
                extra = 2;
            }
            else // can't go any higher than 2^32
            {
                cMac.update((byte)0xff);
                cMac.update((byte)0xfe);
                cMac.update((byte)(associatedText.length >> 24));
                cMac.update((byte)(associatedText.length >> 16));
                cMac.update((byte)(associatedText.length >> 8));
                cMac.update((byte)associatedText.length);
                
                extra = 6;
            }
            
            cMac.update(associatedText, 0, associatedText.length);
            
            extra = (extra + associatedText.length) % 16;
            if (extra != 0)
            {
                for (int i = 0; i != 16 - extra; i++)
                {
                    cMac.update((byte)0x00);
                }
            }
        }
        
        //
        // add the text
        //
        cMac.update(data, dataOff, dataLen);


        return cMac.doFinal(macBlock, 0);
    }

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Related Classes of org.bouncycastle.crypto.Mac

com.google.authenticator.blackberry.AuthenticatorScreen

com.google.authenticator.blackberry.CheckCodeScreen

org.bouncycastle.crypto.modes.CCMBlockCipher

org.bouncycastle.crypto.test.MacTest

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