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 <pre><span class="source-line-no">001</span><span id="line-1">/*</span>
 <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span>
 <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements.  See the NOTICE file</span>
 <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span>
 <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership.  The ASF licenses this file</span>
 <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span>
 <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span>
 <span class="source-line-no">008</span><span id="line-8"> * with the License.  You may obtain a copy of the License at</span>
 <span class="source-line-no">009</span><span id="line-9"> *</span>
 <span class="source-line-no">010</span><span id="line-10"> *     http://www.apache.org/licenses/LICENSE-2.0</span>
 <span class="source-line-no">011</span><span id="line-11"> *</span>
 <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span>
 <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span>
 <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
 <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span>
 <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span>
 <span class="source-line-no">017</span><span id="line-17"> */</span>
 <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.util;</span>
 <span class="source-line-no">019</span><span id="line-19"></span>
 <span class="source-line-no">020</span><span id="line-20">import java.security.MessageDigest;</span>
 <span class="source-line-no">021</span><span id="line-21">import java.security.NoSuchAlgorithmException;</span>
 <span class="source-line-no">022</span><span id="line-22">import org.apache.commons.codec.binary.Hex;</span>
 <span class="source-line-no">023</span><span id="line-23">import org.apache.yetus.audience.InterfaceAudience;</span>
 <span class="source-line-no">024</span><span id="line-24"></span>
 <span class="source-line-no">025</span><span id="line-25">/**</span>
 <span class="source-line-no">026</span><span id="line-26"> * Utility class for MD5 MD5 hash produces a 128-bit digest.</span>
 <span class="source-line-no">027</span><span id="line-27"> */</span>
 <span class="source-line-no">028</span><span id="line-28">@InterfaceAudience.Public</span>
 <span class="source-line-no">029</span><span id="line-29">public class MD5Hash {</span>
 <span class="source-line-no">030</span><span id="line-30"></span>
 <span class="source-line-no">031</span><span id="line-31">  /**</span>
 <span class="source-line-no">032</span><span id="line-32">   * Given a byte array, returns in MD5 hash as a hex string.</span>
 <span class="source-line-no">033</span><span id="line-33">   * @return SHA1 hash as a 32 character hex string.</span>
 <span class="source-line-no">034</span><span id="line-34">   */</span>
 <span class="source-line-no">035</span><span id="line-35">  public static String getMD5AsHex(byte[] key) {</span>
 <span class="source-line-no">036</span><span id="line-36">    return getMD5AsHex(key, 0, key.length);</span>
 <span class="source-line-no">037</span><span id="line-37">  }</span>
 <span class="source-line-no">038</span><span id="line-38"></span>
 <span class="source-line-no">039</span><span id="line-39">  /**</span>
 <span class="source-line-no">040</span><span id="line-40">   * Given a byte array, returns its MD5 hash as a hex string. Only "length" number of bytes</span>
 <span class="source-line-no">041</span><span id="line-41">   * starting at "offset" within the byte array are used.</span>
 <span class="source-line-no">042</span><span id="line-42">   * @param key the key to hash (variable length byte array)</span>
 <span class="source-line-no">043</span><span id="line-43">   * @return MD5 hash as a 32 character hex string.</span>
 <span class="source-line-no">044</span><span id="line-44">   */</span>
 <span class="source-line-no">045</span><span id="line-45">  public static String getMD5AsHex(byte[] key, int offset, int length) {</span>
 <span class="source-line-no">046</span><span id="line-46">    try {</span>
 <span class="source-line-no">047</span><span id="line-47">      MessageDigest md = MessageDigest.getInstance("MD5");</span>
 <span class="source-line-no">048</span><span id="line-48">      md.update(key, offset, length);</span>
 <span class="source-line-no">049</span><span id="line-49">      byte[] digest = md.digest();</span>
 <span class="source-line-no">050</span><span id="line-50">      return new String(Hex.encodeHex(digest));</span>
 <span class="source-line-no">051</span><span id="line-51">    } catch (NoSuchAlgorithmException e) {</span>
 <span class="source-line-no">052</span><span id="line-52">      // this should never happen unless the JDK is messed up.</span>
 <span class="source-line-no">053</span><span id="line-53">      throw new RuntimeException("Error computing MD5 hash", e);</span>
 <span class="source-line-no">054</span><span id="line-54">    }</span>
 <span class="source-line-no">055</span><span id="line-55">  }</span>
 <span class="source-line-no">056</span><span id="line-56">}</span>


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	<pre><span class="source-line-no">001</span><span id="line-1">/*</span>
	<span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span>
	<span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span>
	<span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span>
	<span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span>
	<span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span>
	<span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span>
	<span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span>
	<span class="source-line-no">009</span><span id="line-9"> *</span>
	<span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span>
	<span class="source-line-no">011</span><span id="line-11"> *</span>
	<span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span>
	<span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span>
	<span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
	<span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span>
	<span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span>
	<span class="source-line-no">017</span><span id="line-17"> */</span>
	<span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.util;</span>
	<span class="source-line-no">019</span><span id="line-19"></span>
	<span class="source-line-no">020</span><span id="line-20">import java.security.MessageDigest;</span>
	<span class="source-line-no">021</span><span id="line-21">import java.security.NoSuchAlgorithmException;</span>
	<span class="source-line-no">022</span><span id="line-22">import org.apache.commons.codec.binary.Hex;</span>
	<span class="source-line-no">023</span><span id="line-23">import org.apache.yetus.audience.InterfaceAudience;</span>
	<span class="source-line-no">024</span><span id="line-24"></span>
	<span class="source-line-no">025</span><span id="line-25">/**</span>
	<span class="source-line-no">026</span><span id="line-26"> * Utility class for MD5 MD5 hash produces a 128-bit digest.</span>
	<span class="source-line-no">027</span><span id="line-27"> */</span>
	<span class="source-line-no">028</span><span id="line-28">@InterfaceAudience.Public</span>
	<span class="source-line-no">029</span><span id="line-29">public class MD5Hash {</span>
	<span class="source-line-no">030</span><span id="line-30"></span>
	<span class="source-line-no">031</span><span id="line-31"> /**</span>
	<span class="source-line-no">032</span><span id="line-32"> * Given a byte array, returns in MD5 hash as a hex string.</span>
	<span class="source-line-no">033</span><span id="line-33"> * @return SHA1 hash as a 32 character hex string.</span>
	<span class="source-line-no">034</span><span id="line-34"> */</span>
	<span class="source-line-no">035</span><span id="line-35"> public static String getMD5AsHex(byte[] key) {</span>
	<span class="source-line-no">036</span><span id="line-36"> return getMD5AsHex(key, 0, key.length);</span>
	<span class="source-line-no">037</span><span id="line-37"> }</span>
	<span class="source-line-no">038</span><span id="line-38"></span>
	<span class="source-line-no">039</span><span id="line-39"> /**</span>
	<span class="source-line-no">040</span><span id="line-40"> * Given a byte array, returns its MD5 hash as a hex string. Only "length" number of bytes</span>
	<span class="source-line-no">041</span><span id="line-41"> * starting at "offset" within the byte array are used.</span>
	<span class="source-line-no">042</span><span id="line-42"> * @param key the key to hash (variable length byte array)</span>
	<span class="source-line-no">043</span><span id="line-43"> * @return MD5 hash as a 32 character hex string.</span>
	<span class="source-line-no">044</span><span id="line-44"> */</span>
	<span class="source-line-no">045</span><span id="line-45"> public static String getMD5AsHex(byte[] key, int offset, int length) {</span>
	<span class="source-line-no">046</span><span id="line-46"> try {</span>
	<span class="source-line-no">047</span><span id="line-47"> MessageDigest md = MessageDigest.getInstance("MD5");</span>
	<span class="source-line-no">048</span><span id="line-48"> md.update(key, offset, length);</span>
	<span class="source-line-no">049</span><span id="line-49"> byte[] digest = md.digest();</span>
	<span class="source-line-no">050</span><span id="line-50"> return new String(Hex.encodeHex(digest));</span>
	<span class="source-line-no">051</span><span id="line-51"> } catch (NoSuchAlgorithmException e) {</span>
	<span class="source-line-no">052</span><span id="line-52"> // this should never happen unless the JDK is messed up.</span>
	<span class="source-line-no">053</span><span id="line-53"> throw new RuntimeException("Error computing MD5 hash", e);</span>
	<span class="source-line-no">054</span><span id="line-54"> }</span>
	<span class="source-line-no">055</span><span id="line-55"> }</span>
	<span class="source-line-no">056</span><span id="line-56">}</span>




























































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