/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.aws.security;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.SignatureException;
import static com.hazelcast.aws.impl.Constants.SIGNATURE_METHOD;
import static com.hazelcast.util.Base64.encode;
import static com.hazelcast.util.StringUtil.bytesToString;
import static com.hazelcast.util.StringUtil.stringToBytes;
public class RFC2104HMAC {
private RFC2104HMAC(){}
public static String calculateRFC2104HMAC(String data, String key)
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());
}
return result;
}
}