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MDW is a microservices based workflow framework

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/*
 * Copyright (C) 2017 CenturyLink, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.centurylink.mdw.util;

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Hex;

public class HmacSha1Signature {

    //TODO Add more as required
    public static final String ALGORITHM = "HmacSHA1";

    public static String getHMACHexdigestSignature (byte[] payloadBytes, String key)
    throws InvalidKeyException, NoSuchAlgorithmException {
        SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), ALGORITHM);
        Mac mac = Mac.getInstance(ALGORITHM);
        mac.init(keySpec);
        byte[] rawHmac = mac.doFinal(payloadBytes);
        return Hex.encodeHexString(rawHmac);
    }
}