49 lines
1.7 KiB
Java
49 lines
1.7 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.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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public class ByteUtils {
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private static MessageDigest md5Digest;
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public synchronized static byte[] md5(byte[] data) {
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if (md5Digest == null) {
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try {
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md5Digest = MessageDigest.getInstance(StringUtils.MD5);
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}
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catch (NoSuchAlgorithmException nsae) {
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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(nsae);
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}
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}
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md5Digest.update(data);
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return md5Digest.digest();
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}
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public static byte[] concact(byte[] arrayOne, byte[] arrayTwo) {
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int combinedLength = arrayOne.length + arrayTwo.length;
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byte[] res = new byte[combinedLength];
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System.arraycopy(arrayOne, 0, res, 0, arrayOne.length);
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System.arraycopy(arrayTwo, 0, res, arrayOne.length, arrayTwo.length);
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return res;
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}
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}
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