Package javax.crypto

Examples of javax.crypto.Mac

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     *         username token
     */
    public byte[] getSecretKey(int keylen, String labelString) {
        byte[] key = null;
        try {
            Mac mac = Mac.getInstance("HMACSHA1");
            byte[] password = getPassword().getBytes("UTF-8");
            byte[] label = labelString.getBytes("UTF-8");
            byte[] nonce = Base64.decode(getNonce());
            byte[] created = getCreated().getBytes("UTF-8");
            byte[] seed = new byte[label.length + nonce.length + created.length];
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            bytes[i] = (byte) (id);
            id >>>= 8;
        }

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

            return mac.doFinal();
        } catch (NoSuchAlgorithmException e) {
        } catch (InvalidKeyException e) {
        }
        assert false : "Should never have reached here";
        return null;
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        try {
            this.macAlgorithm.init(secretKey);
        } catch (InvalidKeyException ex) {
            // reinstantiate Mac object to work around bug in JDK
            // see: http://bugs.sun.com/view_bug.do?bug_id=4953555
            Mac mac = this.macAlgorithm;
            try {
                this.macAlgorithm = Mac.getInstance(macAlgorithm.getAlgorithm());
            } catch (Exception e) {
                // this shouldn't occur, but if it does, restore previous Mac
                if (log.isDebugEnabled()) {
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                byte[] keyBytes = keyString.getBytes(ENCODING);
                this.key = new SecretKeySpec(keyBytes, MAC_NAME);
            }
            key = this.key;
        }
        Mac mac = Mac.getInstance(MAC_NAME);
        mac.init(key);
        byte[] text = baseString.getBytes(ENCODING);
        return mac.doFinal(text);
    }
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  public String digestParams(RestInvocation restInvocation) {

    // VoS message is url path + 'null character' + request. Ex: "/info/account\000nonce=1234567890"
    String message = "/" + restInvocation.getPath() + "\000" + restInvocation.getRequestBody();

    Mac mac = getMac();
    mac.update(message.getBytes());

    return Base64.encodeBytes((String.format("%064x", new BigInteger(1, mac.doFinal())).getBytes()));
  }
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      throw new Exception("Invalid request. (Unsupported algorithm.)");
    }

    byte[] key = secret.getBytes();
    SecretKey hmacKey = new SecretKeySpec(key, "HMACSHA256");
    Mac mac = Mac.getInstance("HMACSHA256");
    mac.init(hmacKey);
    byte[] digest = mac.doFinal(encoded_envelope.getBytes());

    return envelope;

  }
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            // Create the HMAC/SHA1 key
            SecretKeySpec signingKey = new SecretKeySpec(secretKey.getBytes(),
                    "HmacSHA1");

            // Create the message authentication code (MAC)
            Mac mac = Mac.getInstance("HmacSHA1");
            mac.init(signingKey);

            // Compute the HMAC value
            result = mac.doFinal(source.getBytes());
        } catch (NoSuchAlgorithmException nsae) {
            throw new RuntimeException(
                    "Could not find the SHA-1 algorithm. HMac conversion failed.",
                    nsae);
        } catch (InvalidKeyException ike) {
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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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        PBEParameterSpec    defParams = new PBEParameterSpec(salt, itCount);
        PBEKeySpec          pbeSpec = new PBEKeySpec(password);
        JCEPBEKey           key = (JCEPBEKey) keyFact.generateSecret(pbeSpec);
        key.setTryWrongPKCS12Zero(wrongPkcs12Zero);

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