Package javax.crypto

Examples of javax.crypto.Mac

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        if((size > 32768) || (size < 0)) {
            throw new CHKDecodeException("Invalid size: "+size);
        }
    try {
        // Check the hash.
        Mac hmac = Mac.getInstance("HmacSHA256", hmacProvider);
        hmac.init(new SecretKeySpec(cryptoKey, "HmacSHA256"));
        hmac.update(plaintext);
        hmac.update(lengthBytes);
        byte[] hashCheck = hmac.doFinal();
        if(!Arrays.equals(hash, hashCheck)) {
          throw new CHKDecodeException("HMAC is wrong, wrong decryption key?");
        }
    } catch(GeneralSecurityException e) {
      throw new CHKDecodeException("Problem with JCA, should be impossible!", e);
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    try {
      // IV = HMAC<cryptokey>(plaintext).
        // It's okay that this is the same for 2 blocks with the same key and the same content.
        // In fact that's the point; this is still a Content Hash Key.
        // FIXME And yes we should check on insert for multiple identical keys.
        Mac hmac = Mac.getInstance("HmacSHA256", hmacProvider);
        hmac.init(new SecretKeySpec(encKey, "HmacSHA256"));
        byte[] tmpLen = new byte[] {
              (byte)(dataLength >> 8), (byte)(dataLength & 0xff)
            };
        hmac.update(data);
        hmac.update(tmpLen);
        byte[] hash = hmac.doFinal();
        byte[] header = new byte[hash.length+2+2];
      if(blockHashAlgorithm == 0) cryptoAlgorithm = KeyBlock.HASH_SHA256;
      if(blockHashAlgorithm != KeyBlock.HASH_SHA256)
        throw new IllegalArgumentException("Unsupported block hash algorithm "+cryptoAlgorithm);
        header[0] = (byte)(blockHashAlgorithm >> 8);
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    try {
      // IV = HMAC<cryptokey>(plaintext).
        // It's okay that this is the same for 2 blocks with the same key and the same content.
        // In fact that's the point; this is still a Content Hash Key.
        // FIXME And yes we should check on insert for multiple identical keys.
        Mac hmac = Mac.getInstance("HmacSHA256", hmacProvider);
        hmac.init(new SecretKeySpec(encKey, "HmacSHA256"));
        byte[] tmpLen = new byte[] {
              (byte)(dataLength >> 8), (byte)(dataLength & 0xff)
            };
        hmac.update(data);
        hmac.update(tmpLen);
        byte[] hash = hmac.doFinal();
        byte[] header = new byte[hash.length+2+2];
      if(blockHashAlgorithm == 0) cryptoAlgorithm = KeyBlock.HASH_SHA256;
      if(blockHashAlgorithm != KeyBlock.HASH_SHA256)
        throw new IllegalArgumentException("Unsupported block hash algorithm "+cryptoAlgorithm);
        header[0] = (byte)(blockHashAlgorithm >> 8);
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        byte[]  output)
        throws Exception
    {
        SecretKey           key = new SecretKeySpec(keyBytes, hmacName);
        byte[]              out;
        Mac                 mac;

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

        mac.init(key);

        mac.reset();

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

        out = mac.doFinal();

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

        // no key generator for the old algorithms
        if (hmacName.startsWith("Old"))
        {
            return;
        }

        KeyGenerator kGen = KeyGenerator.getInstance(hmacName, "BC");

        mac.init(kGen.generateKey());

        mac.update(message);

        out = mac.doFinal();
    }
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    }

    private void testExceptions()
        throws Exception
    {
        Mac mac = null;

        mac = Mac.getInstance("HmacSHA1", "BC");

        byte [] b = {(byte)1, (byte)2, (byte)3, (byte)4, (byte)5};
        SecretKeySpec sks = new SecretKeySpec(b, "HmacSHA1");
        RC5ParameterSpec algPS = new RC5ParameterSpec(100, 100, 100);

        try
        {
            mac.init(sks, algPS);
        }
        catch (InvalidAlgorithmParameterException e)
        {
            // ignore okay
        }

        try
        {
            mac.init(null, null);
        }
        catch (InvalidKeyException e)
        {
            // ignore okay
        }
        catch (InvalidAlgorithmParameterException e)
        {
            // ignore okay
        }

        try
        {
            mac.init(null);
        }
        catch (InvalidKeyException e)
        {
            // ignore okay
        }
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    }

    public void performTest()
        throws Exception
    {
        Mac mac = Mac.getInstance("AESCMAC", "BC");

        //128 bytes key

        SecretKeySpec key = new SecretKeySpec(keyBytes128, "AES");

        // 0 bytes message - 128 bytes key
        mac.init(key);

        mac.update(input0, 0, input0.length);

        byte[] out = new byte[mac.getMacLength()];

        mac.doFinal(out, 0);

        if (!areEqual(out, output_k128_m0))
        {
            fail("Failed - expected " + new String(Hex.encode(output_k128_m0))
                + " got " + new String(Hex.encode(out)));
        }

        // 16 bytes message - 128 bytes key
        mac.init(key);

        mac.update(input16, 0, input16.length);

        out = new byte[mac.getMacLength()];

        mac.doFinal(out, 0);

        if (!areEqual(out, output_k128_m16))
        {
            fail("Failed - expected " + new String(Hex.encode(output_k128_m16))
                + " got " + new String(Hex.encode(out)));
        }

        // 40 bytes message - 128 bytes key
        mac.init(key);

        mac.update(input40, 0, input40.length);

        out = new byte[mac.getMacLength()];

        mac.doFinal(out, 0);

        if (!areEqual(out, output_k128_m40))
        {
            fail("Failed - expected " + new String(Hex.encode(output_k128_m40))
                + " got " + new String(Hex.encode(out)));
        }

        // 64 bytes message - 128 bytes key
        mac.init(key);

        mac.update(input64, 0, input64.length);

        out = new byte[mac.getMacLength()];

        mac.doFinal(out, 0);

        if (!areEqual(out, output_k128_m64))
        {
            fail("Failed - expected " + new String(Hex.encode(output_k128_m64))
                + " got " + new String(Hex.encode(out)));
        }

        //192 bytes key

        key = new SecretKeySpec(keyBytes192, "AES");

        // 0 bytes message - 192 bytes key
        mac.init(key);

        mac.update(input0, 0, input0.length);

        out = new byte[mac.getMacLength()];

        mac.doFinal(out, 0);

        if (!areEqual(out, output_k192_m0))
        {
            fail("Failed - expected " + new String(Hex.encode(output_k192_m0))
                + " got " + new String(Hex.encode(out)));
        }

        // 16 bytes message - 192 bytes key
        mac.init(key);

        mac.update(input16, 0, input16.length);

        out = new byte[mac.getMacLength()];

        mac.doFinal(out, 0);

        if (!areEqual(out, output_k192_m16))
        {
            fail("Failed - expected " + new String(Hex.encode(output_k192_m16))
                + " got " + new String(Hex.encode(out)));
        }

        // 40 bytes message - 192 bytes key
        mac.init(key);

        mac.update(input40, 0, input40.length);

        out = new byte[mac.getMacLength()];

        mac.doFinal(out, 0);

        if (!areEqual(out, output_k192_m40))
        {
            fail("Failed - expected " + new String(Hex.encode(output_k192_m40))
                + " got " + new String(Hex.encode(out)));
        }

        // 64 bytes message - 192 bytes key
        mac.init(key);

        mac.update(input64, 0, input64.length);

        out = new byte[mac.getMacLength()];

        mac.doFinal(out, 0);

        if (!areEqual(out, output_k192_m64))
        {
            fail("Failed - expected " + new String(Hex.encode(output_k192_m64))
                + " got " + new String(Hex.encode(out)));
        }

        //256 bytes key

        key = new SecretKeySpec(keyBytes256, "AES");

        // 0 bytes message - 256 bytes key
        mac.init(key);

        mac.update(input0, 0, input0.length);

        out = new byte[mac.getMacLength()];

        mac.doFinal(out, 0);

        if (!areEqual(out, output_k256_m0))
        {
            fail("Failed - expected " + new String(Hex.encode(output_k256_m0))
                + " got " + new String(Hex.encode(out)));
        }

        // 16 bytes message - 256 bytes key
        mac.init(key);

        mac.update(input16, 0, input16.length);

        out = new byte[mac.getMacLength()];

        mac.doFinal(out, 0);

        if (!areEqual(out, output_k256_m16))
        {
            fail("Failed - expected " + new String(Hex.encode(output_k256_m16))
                + " got " + new String(Hex.encode(out)));
        }

        // 40 bytes message - 256 bytes key
        mac.init(key);

        mac.update(input40, 0, input40.length);

        out = new byte[mac.getMacLength()];

        mac.doFinal(out, 0);

        if (!areEqual(out, output_k256_m40))
        {
            fail("Failed - expected " + new String(Hex.encode(output_k256_m40))
                + " got " + new String(Hex.encode(out)));
        }

        // 64 bytes message - 256 bytes key
        mac.init(key);

        mac.update(input64, 0, input64.length);

        out = new byte[mac.getMacLength()];

        mac.doFinal(out, 0);

        if (!areEqual(out, output_k256_m64))
        {
            fail("Failed - expected " + new String(Hex.encode(output_k256_m64))
                + " got " + new String(Hex.encode(out)));
        }

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

        //DESede

        key = new SecretKeySpec(keyBytes128, "DESede");

        // 0 bytes message - 128 bytes key
        mac.init(key);

        mac.update(input0, 0, input0.length);

        out = new byte[mac.getMacLength()];

        mac.doFinal(out, 0);

        if (!areEqual(out, output_des_ede))
        {
            fail("Failed - expected " + new String(Hex.encode(output_des_ede))
                + " got " + new String(Hex.encode(out)));
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        byte[] key = Hex.decode("000102030405060708090a0b0c0d0e0f");
        byte[] input = Hex.decode("000102030405060708090a0b0c0d0e");

        byte[] expected = Hex.decode("e545be4961ca29a1");

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

        mac.init(new SecretKeySpec(key, "SipHash"));

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

        byte[] result = mac.doFinal();

        if (!Arrays.areEqual(expected, result))
        {
            fail("Result does not match expected value for doFinal()");
        }

        mac.init(new SecretKeySpec(key, "SipHash-2-4"));

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

        result = mac.doFinal();
        if (!Arrays.areEqual(expected, result))
        {
            fail("Result does not match expected value for second doFinal()");
        }

        mac = Mac.getInstance("SipHash-2-4", "BC");

        mac.init(new SecretKeySpec(key, "SipHash-2-4"));

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

        result = mac.doFinal();
        if (!Arrays.areEqual(expected, result))
        {
            fail("Result does not match expected value for alias");
        }

        // SipHash 4-8
        expected = Hex.decode("e0a6a97dd589d383");

        mac = Mac.getInstance("SipHash-4-8", "BC");

        mac.init(new SecretKeySpec(key, "SipHash"));

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

        result = mac.doFinal();

        if (!Arrays.areEqual(expected, result))
        {
            fail("Result does not match expected value for SipHash 4-8");
        }
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        SecretKeyFactory keyFact = SecretKeyFactory.getInstance(oid.getId(), provider);
        PBEParameterSpec defParams = new PBEParameterSpec(salt, itCount);
        PBEKeySpec pbeSpec = new PBEKeySpec(password);
        SecretKey key = keyFact.generateSecret(pbeSpec);

        Mac mac = Mac.getInstance(oid.getId(), provider);
        mac.init(key, defParams);
        mac.update(data);

        return mac.doFinal();
    }
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        PBEParameterSpec defParams = new PBEParameterSpec(salt, itCount);
        PBEKeySpec pbeSpec = new PBEKeySpec(password);
        BCPBEKey key = (BCPBEKey)keyFact.generateSecret(pbeSpec);
        key.setTryWrongPKCS12Zero(wrongPkcs12Zero);

        Mac mac = Mac.getInstance(oid.getId(), bcProvider);
        mac.init(key, defParams);
        mac.update(data);
        return mac.doFinal();
    }
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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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