Examples of javax.crypto.Mac

javax.crypto.Mac
This class provides the public API for Message Authentication Code (MAC) algorithms.

    public void performTest()
        throws Exception
    {
        SecretKey           key = new SecretKeySpec(keyBytes, "DES");
        byte[]              out;
        Mac                 mac;


        mac = Mac.getInstance("DESMac", "BC");


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


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


        out = mac.doFinal();


        if (!areEqual(out, output1))
        {
            fail("Failed - expected " + new String(Hex.encode(output1)) + " got " + new String(Hex.encode(out)));
        }
        
        //
        // mac with IV.
        //
        mac.init(key, new IvParameterSpec(ivBytes));


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


        out = mac.doFinal();


        if (!areEqual(out, output2))
        {
            fail("Failed - expected " + new String(Hex.encode(output2)) + " got " + new String(Hex.encode(out)));
        }
        
        //
        // CFB mac with IV - 8 bit CFB mode
        //
        mac = Mac.getInstance("DESMac/CFB8", "BC");


        mac.init(key, new IvParameterSpec(ivBytes));


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


        out = mac.doFinal();


        if (!areEqual(out, output3))
        {
            fail("Failed - expected " + new String(Hex.encode(output3)) + " got " + new String(Hex.encode(out)));
        }
        
        //
        // ISO9797 algorithm 3 using DESEDE
        //
        key = new SecretKeySpec(keyBytesISO9797, "DESEDE");
        
        mac = Mac.getInstance("ISO9797ALG3", "BC");


        mac.init(key);


        mac.update(inputISO9797, 0, inputISO9797.length);


        out = mac.doFinal();


        if (!areEqual(out, outputISO9797))
        {
            fail("Failed - expected " + new String(Hex.encode(outputISO9797)) + " got " + new String(Hex.encode(out)));
        }
        
        //
        // 64bit DESede Mac
        //
        key = new SecretKeySpec(keyBytesISO9797, "DESEDE");
        
        mac = Mac.getInstance("DESEDE64", "BC");


        mac.init(key);


        mac.update(inputDesEDE64, 0, inputDesEDE64.length);


        out = mac.doFinal();


        if (!areEqual(out, outputDesEDE64))
        {
            fail("Failed - expected " + new String(Hex.encode(outputDesEDE64)) + " got " + new String(Hex.encode(out)));
        }

View Full Code Here

        String  hmacName,
        byte[]  output)
    {
        SecretKey           key;
        byte[]              out;
        Mac                 mac;


        try
        {
            SecretKeyFactory    fact = SecretKeyFactory.getInstance(hmacName, "BC");


            key = fact.generateSecret(new PBEKeySpec("hello".toCharArray()));
            
            mac = Mac.getInstance(hmacName, "BC");
        }
        catch (Exception e)
        {
            fail("Failed - exception " + e.toString(), e);
            return;
        }


        try
        {
            mac.init(key, new PBEParameterSpec(new byte[20], 100));
        }
        catch (Exception e)
        {
            fail("Failed - exception " + e.toString(), e);
            return;
        }


        mac.reset();
        
        mac.update(message, 0, message.length);


        out = mac.doFinal();


        if (!Arrays.areEqual(out, output))
        {
            fail("Failed - expected " + new String(Hex.encode(output)) + " got " + new String(Hex.encode(out)));
        }

View Full Code Here

        String  hmacName,
        byte[]  output)
    {
        SecretKey           key;
        byte[]              out;
        Mac                 mac;


        try
        {
            SecretKeyFactory    fact = SecretKeyFactory.getInstance(hmacName, "BC");


            key = fact.generateSecret(new PBEKeySpec("hello".toCharArray(), new byte[20], 100, 160));


            mac = Mac.getInstance("HMAC-SHA1", "BC");
        }
        catch (Exception e)
        {
            fail("Failed - exception " + e.toString(), e);
            return;
        }


        try
        {
            mac.init(key);
        }
        catch (Exception e)
        {
            fail("Failed - exception " + e.toString(), e);
            return;
        }


        mac.reset();


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


        out = mac.doFinal();


        if (!Arrays.areEqual(out, output))
        {
            fail("Failed - expected " + new String(Hex.encode(output)) + " got " + new String(Hex.encode(out)));
        }

View Full Code Here


    private void checkMac(String name, List missingMacs, List missingKeyGens, String macOutput)
    {
        try
        {
            Mac mac = Mac.getInstance(name);


            mac.init(new SecretKeySpec(new byte[mac.getMacLength()], mac.getAlgorithm()), new IvParameterSpec(
                new byte[16]));
            mac.update(new byte[128]);
            byte[] bytes = mac.doFinal();


            if (!Arrays.areEqual(bytes, Hex.decode(macOutput)))
            {
                fail("wrong mac value computed for " + name);
            }

View Full Code Here

        
        String auth;
        try {
            final SecretKeySpec signingKey = new SecretKeySpec(m_password.getBytes(), SIGNATURE_ALGORITHM);


            final Mac mac = Mac.getInstance(SIGNATURE_ALGORITHM);
            mac.init(signingKey);


            // BASE64Encoder isn't technically a public class, but it
            // has been consistently available in Java releases to date
            auth = Base64.encodeBytes(mac.doFinal(buf.toString().getBytes()));
        }
        catch(Exception e) {
            throw new IllegalArgumentException("Unable to calculate digest", e);
        }

View Full Code Here

    {
        try
        {
            SecretKey sk = new SecretKeySpec( key, "AES" );


            Mac mac = Mac.getInstance( "HmacSHA1" );
            mac.init( sk );


            return mac.doFinal( data );
        }
        catch ( GeneralSecurityException nsae )
        {
            nsae.printStackTrace();
            return null;

View Full Code Here

    {
        try
        {
            SecretKey sk = new SecretKeySpec( key, "DESede" );


            Mac mac = Mac.getInstance( "HmacSHA1" );
            mac.init( sk );


            return mac.doFinal( data );
        }
        catch ( GeneralSecurityException nsae )
        {
            nsae.printStackTrace();
            return null;

View Full Code Here

        String macAlgorithm = findMacAlgorithm(ctx);
                
        try
        {
            // keep local to avoid threading issue
            Mac mac = Mac.getInstance(macAlgorithm);
            mac.init(macSecretKey);
            Cipher cipher = Cipher.getInstance(algorithm + "/" + algorithmParams);
            if (iv != null)
            {
                IvParameterSpec ivSpec = new IvParameterSpec(iv);
                cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivSpec);
            }
            else
            {
                cipher.init(Cipher.ENCRYPT_MODE, secretKey);
            }
            if (log.isDebugEnabled())
            {
                log.debug("encrypting w/ " + algorithm + "/" + algorithmParams);
            }
            
            //EtM Composition Approach
            int macLenght = mac.getMacLength();
            byte[] secure = new byte[cipher.getOutputSize(insecure.length)+ macLenght];
            int secureCount = cipher.doFinal(insecure,0,insecure.length,secure);
            mac.update(secure, 0, secureCount);
            mac.doFinal(secure, secureCount);
                        
            return secure;
        }
        catch (Exception e)
        {

View Full Code Here

        String macAlgorithm = findMacAlgorithm(ctx);


        try
        {
            // keep local to avoid threading issue
            Mac mac = Mac.getInstance(macAlgorithm);
            mac.init(macSecretKey);
            Cipher cipher = Cipher.getInstance(algorithm + "/"
                    + algorithmParams);
            if (iv != null)
            {
                IvParameterSpec ivSpec = new IvParameterSpec(iv);
                cipher.init(Cipher.DECRYPT_MODE, secretKey, ivSpec);
            }
            else
            {
                cipher.init(Cipher.DECRYPT_MODE, secretKey);
            }
            if (log.isDebugEnabled())
            {
                log.debug("decrypting w/ " + algorithm + "/" + algorithmParams);
            }


            //EtM Composition Approach
            int macLenght = mac.getMacLength();
            mac.update(secure, 0, secure.length-macLenght);
            byte[] signedDigestHash = mac.doFinal();


            boolean isMacEqual = true;
            for (int i = 0; i < signedDigestHash.length; i++)
            {
                if (signedDigestHash[i] != secure[secure.length-macLenght+i])

View Full Code Here

        if (secret == null) {
            return false;
        }


        // create a Mac based on that secret
        Mac mac;
        try {
            mac = Mac.getInstance("HmacSHA1");
            mac.init(secret);
        } catch (NoSuchAlgorithmException nsae) {
            // shouldn't happen
            throw new IllegalStateException(nsae);
        } catch (InvalidKeyException ike) {
            // shouldn't happen

View Full Code Here

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