55 lines
1.6 KiB
Java
55 lines
1.6 KiB
Java
/**
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*
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* Copyright © 2014 Florian Schmaus
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.util;
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import java.security.InvalidKeyException;
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import java.security.NoSuchAlgorithmException;
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import javax.crypto.Mac;
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import javax.crypto.spec.SecretKeySpec;
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public class MAC {
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public static final String HMACSHA1 = "HmacSHA1";
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private static Mac HMAC_SHA1;
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static {
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try {
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HMAC_SHA1 = Mac.getInstance(HMACSHA1);
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}
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catch (NoSuchAlgorithmException e) {
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// Smack wont be able to function normally if this exception is thrown, wrap it into
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// an ISE and make the user aware of the problem.
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throw new IllegalStateException(e);
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}
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}
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public static synchronized byte[] hmacsha1(SecretKeySpec key, byte[] input) throws InvalidKeyException {
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HMAC_SHA1.init(key);
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return HMAC_SHA1.doFinal(input);
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}
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public static byte[] hmacsha1(byte[] keyBytes, byte[] input) throws InvalidKeyException {
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SecretKeySpec key = new SecretKeySpec(keyBytes, HMACSHA1);
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return hmacsha1(key, input);
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}
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}
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