Package javax.crypto

Examples of javax.crypto.Mac

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        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 (!arrayEquals(out, output))
        {
            fail("Failed - expected " + new String(Hex.encode(output)) + " got " + new String(Hex.encode(out)));
        }
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            throws SignatureException {
        String result;
        try {
            SecretKeySpec signingKey = new SecretKeySpec(stringToBytes(key),
                    SIGNATURE_METHOD);
            Mac mac = Mac.getInstance(SIGNATURE_METHOD);
            mac.init(signingKey);
            byte[] rawSignature = mac.doFinal(stringToBytes(data));
            result = bytesToString(encode(rawSignature));
            result = result.trim();
        } catch (Exception e) {
            throw new SignatureException("Failed to generate HMAC : "
                    + e.getMessage());
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    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)));
        }
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    }

    private void aliasTest(SecretKey key, String primary, String[] aliases)
        throws Exception
    {
        Mac mac = Mac.getInstance(primary, "BC");

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

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

        byte[] ref = mac.doFinal();

        for (int i = 0; i != aliases.length; i++)
        {
            mac = Mac.getInstance(aliases[i], "BC");

            mac.init(key);

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

            byte[] out = mac.doFinal();
            if (!areEqual(out, ref))
            {
                fail("Failed - expected " + new String(Hex.encode(ref)) + " got " + new String(Hex.encode(out)));
            }
        }
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      return fname;
    }

    String getHmacSha1(String data, byte[] key) {
        SecretKeySpec signingKey = new SecretKeySpec(key, HMAC_SHA1_ALGORITHM);
        Mac mac = null;
        try {
            mac = Mac.getInstance(HMAC_SHA1_ALGORITHM);
            mac.init(signingKey);
        }
        catch(NoSuchAlgorithmException e) {
            throw new OpenIdException(e);
        }
        catch(InvalidKeyException e) {
            throw new OpenIdException(e);
        }
        try {
            byte[] rawHmac = mac.doFinal(data.getBytes("UTF-8"));
            return Base64.encodeBytes(rawHmac);
        }
        catch(IllegalStateException e) {
            throw new OpenIdException(e);
        }
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     */
    public byte[] getSignature(byte[] secretKey, byte[] toSign) throws NoSuchAlgorithmException,
        InvalidKeyException
    {
        SecretKeySpec sks = new SecretKeySpec(secretKey, _algorithm);
        Mac m = Mac.getInstance(sks.getAlgorithm());
        m.init(sks);
        return m.doFinal(toSign);  
    }
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    public static String getMacSignature(String secretKey, String base, String algorithm)
    {
        try
        {
            SecretKeySpec sks = new SecretKeySpec(secretKey.getBytes(Constants.ENCODING), algorithm);
            Mac m = Mac.getInstance(sks.getAlgorithm());
            m.init(sks);
            return new String(B64Code.encode(m.doFinal(base.getBytes(Constants.ENCODING))));
        }
        catch(Exception e)
        {
            throw new RuntimeException(e);
        }           
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    public static MacOutputStream streamFor(Key key) throws IOException
    {
        try
        {
            Mac mac = Mac.getInstance(key.getAlgorithm());
            mac.init(key);

            return new MacOutputStream(mac);
        } catch (Exception ex)
        {
            throw new IOException("Unable to create MacOutputStream: " + InternalUtils.toMessage(ex), ex);
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        /**
         * Make sure that we can generate the  Mac.
         */
        try {
            Mac mac = Mac.getInstance(algorithm);
            mac.init(key);
        } catch (NoSuchAlgorithmException e) {
            assert false : "Should never have reached here";
            throw new ProviderException("No such algorithm: " + algorithm + ".  This can be caused by a misconfigured java.ext.dirs, JAVA_HOME or JRE_HOME environment variable.");
        } catch (InvalidKeyException e) {
            assert false : "Should never have reached here";
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        for (int i = 7; i >= 0; i--) {
            bytes[i] = (byte) (n);
            n >>>= 8;
        }

        Mac mac = Mac.getInstance(algorithm);
        mac.init(key);
        mac.update(bytes);

        return mac.doFinal();
    }
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