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| <pre><span class="sourceLineNo">001</span><a id="line.1">package org.apache.fulcrum.crypto.provider;</a> |
| <span class="sourceLineNo">002</span><a id="line.2"></a> |
| <span class="sourceLineNo">003</span><a id="line.3">/*</a> |
| <span class="sourceLineNo">004</span><a id="line.4"> * Licensed to the Apache Software Foundation (ASF) under one</a> |
| <span class="sourceLineNo">005</span><a id="line.5"> * or more contributor license agreements. See the NOTICE file</a> |
| <span class="sourceLineNo">006</span><a id="line.6"> * distributed with this work for additional information</a> |
| <span class="sourceLineNo">007</span><a id="line.7"> * regarding copyright ownership. The ASF licenses this file</a> |
| <span class="sourceLineNo">008</span><a id="line.8"> * to you under the Apache License, Version 2.0 (the</a> |
| <span class="sourceLineNo">009</span><a id="line.9"> * "License"); you may not use this file except in compliance</a> |
| <span class="sourceLineNo">010</span><a id="line.10"> * with the License. You may obtain a copy of the License at</a> |
| <span class="sourceLineNo">011</span><a id="line.11"> *</a> |
| <span class="sourceLineNo">012</span><a id="line.12"> * http://www.apache.org/licenses/LICENSE-2.0</a> |
| <span class="sourceLineNo">013</span><a id="line.13"> *</a> |
| <span class="sourceLineNo">014</span><a id="line.14"> * Unless required by applicable law or agreed to in writing,</a> |
| <span class="sourceLineNo">015</span><a id="line.15"> * software distributed under the License is distributed on an</a> |
| <span class="sourceLineNo">016</span><a id="line.16"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</a> |
| <span class="sourceLineNo">017</span><a id="line.17"> * KIND, either express or implied. See the License for the</a> |
| <span class="sourceLineNo">018</span><a id="line.18"> * specific language governing permissions and limitations</a> |
| <span class="sourceLineNo">019</span><a id="line.19"> * under the License.</a> |
| <span class="sourceLineNo">020</span><a id="line.20"> */</a> |
| <span class="sourceLineNo">021</span><a id="line.21"></a> |
| <span class="sourceLineNo">022</span><a id="line.22">import java.util.Random;</a> |
| <span class="sourceLineNo">023</span><a id="line.23"></a> |
| <span class="sourceLineNo">024</span><a id="line.24">import org.apache.fulcrum.crypto.CryptoAlgorithm;</a> |
| <span class="sourceLineNo">025</span><a id="line.25"></a> |
| <span class="sourceLineNo">026</span><a id="line.26">/**</a> |
| <span class="sourceLineNo">027</span><a id="line.27"> * Implements Standard Unix crypt(3) for use with the Crypto Service.</a> |
| <span class="sourceLineNo">028</span><a id="line.28"> *</a> |
| <span class="sourceLineNo">029</span><a id="line.29"> * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a></a> |
| <span class="sourceLineNo">030</span><a id="line.30"> * @version $Id$</a> |
| <span class="sourceLineNo">031</span><a id="line.31"> */</a> |
| <span class="sourceLineNo">032</span><a id="line.32">public class UnixCrypt implements CryptoAlgorithm </a> |
| <span class="sourceLineNo">033</span><a id="line.33">{</a> |
| <span class="sourceLineNo">034</span><a id="line.34"></a> |
| <span class="sourceLineNo">035</span><a id="line.35"> /** The seed to use */</a> |
| <span class="sourceLineNo">036</span><a id="line.36"> private String seed = null;</a> |
| <span class="sourceLineNo">037</span><a id="line.37"></a> |
| <span class="sourceLineNo">038</span><a id="line.38"> /** standard Unix crypt chars (64) */</a> |
| <span class="sourceLineNo">039</span><a id="line.39"> private static final char[] SALT_CHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./"</a> |
| <span class="sourceLineNo">040</span><a id="line.40"> .toCharArray();</a> |
| <span class="sourceLineNo">041</span><a id="line.41"></a> |
| <span class="sourceLineNo">042</span><a id="line.42"> /**</a> |
| <span class="sourceLineNo">043</span><a id="line.43"> * Constructor</a> |
| <span class="sourceLineNo">044</span><a id="line.44"> */</a> |
| <span class="sourceLineNo">045</span><a id="line.45"> public UnixCrypt() </a> |
| <span class="sourceLineNo">046</span><a id="line.46"> {</a> |
| <span class="sourceLineNo">047</span><a id="line.47"> }</a> |
| <span class="sourceLineNo">048</span><a id="line.48"></a> |
| <span class="sourceLineNo">049</span><a id="line.49"> /**</a> |
| <span class="sourceLineNo">050</span><a id="line.50"> * This class never uses anything but UnixCrypt, so it is just a dummy (Fixme:</a> |
| <span class="sourceLineNo">051</span><a id="line.51"> * Should we throw an exception if something is requested that we don't support?</a> |
| <span class="sourceLineNo">052</span><a id="line.52"> *</a> |
| <span class="sourceLineNo">053</span><a id="line.53"> * @param cipher Cipher (ignored)</a> |
| <span class="sourceLineNo">054</span><a id="line.54"> */</a> |
| <span class="sourceLineNo">055</span><a id="line.55"> public void setCipher(String cipher) </a> |
| <span class="sourceLineNo">056</span><a id="line.56"> {</a> |
| <span class="sourceLineNo">057</span><a id="line.57"> /* dummy */</a> |
| <span class="sourceLineNo">058</span><a id="line.58"> }</a> |
| <span class="sourceLineNo">059</span><a id="line.59"></a> |
| <span class="sourceLineNo">060</span><a id="line.60"> /**</a> |
| <span class="sourceLineNo">061</span><a id="line.61"> * Setting the seed for the UnixCrypt algorithm. If a null value is supplied, or</a> |
| <span class="sourceLineNo">062</span><a id="line.62"> * no seed is set, then a random seed is used.</a> |
| <span class="sourceLineNo">063</span><a id="line.63"> *</a> |
| <span class="sourceLineNo">064</span><a id="line.64"> * @param seed The seed value to use.</a> |
| <span class="sourceLineNo">065</span><a id="line.65"> */</a> |
| <span class="sourceLineNo">066</span><a id="line.66"> public void setSeed(String seed) </a> |
| <span class="sourceLineNo">067</span><a id="line.67"> {</a> |
| <span class="sourceLineNo">068</span><a id="line.68"> this.seed = seed;</a> |
| <span class="sourceLineNo">069</span><a id="line.69"> }</a> |
| <span class="sourceLineNo">070</span><a id="line.70"></a> |
| <span class="sourceLineNo">071</span><a id="line.71"> /**</a> |
| <span class="sourceLineNo">072</span><a id="line.72"> * Encrypt the supplied string with the requested cipher</a> |
| <span class="sourceLineNo">073</span><a id="line.73"> *</a> |
| <span class="sourceLineNo">074</span><a id="line.74"> * @param value The value to be encrypted</a> |
| <span class="sourceLineNo">075</span><a id="line.75"> * @return The encrypted value</a> |
| <span class="sourceLineNo">076</span><a id="line.76"> * @throws Exception An Exception of the underlying implementation.</a> |
| <span class="sourceLineNo">077</span><a id="line.77"> */</a> |
| <span class="sourceLineNo">078</span><a id="line.78"> public String encrypt(String value) throws Exception </a> |
| <span class="sourceLineNo">079</span><a id="line.79"> {</a> |
| <span class="sourceLineNo">080</span><a id="line.80"> if (seed == null) </a> |
| <span class="sourceLineNo">081</span><a id="line.81"> {</a> |
| <span class="sourceLineNo">082</span><a id="line.82"> Random randomGenerator = new Random();</a> |
| <span class="sourceLineNo">083</span><a id="line.83"> int numSaltChars = SALT_CHARS.length;</a> |
| <span class="sourceLineNo">084</span><a id="line.84"> StringBuilder sb = new StringBuilder();</a> |
| <span class="sourceLineNo">085</span><a id="line.85"> sb.append(SALT_CHARS[Math.abs(randomGenerator.nextInt() % numSaltChars)])</a> |
| <span class="sourceLineNo">086</span><a id="line.86"> .append(SALT_CHARS[Math.abs(randomGenerator.nextInt() % numSaltChars)]).toString();</a> |
| <span class="sourceLineNo">087</span><a id="line.87"> seed = sb.toString();</a> |
| <span class="sourceLineNo">088</span><a id="line.88"> }</a> |
| <span class="sourceLineNo">089</span><a id="line.89"></a> |
| <span class="sourceLineNo">090</span><a id="line.90"> // use commons-codec to do the encryption</a> |
| <span class="sourceLineNo">091</span><a id="line.91"> return org.apache.commons.codec.digest.UnixCrypt.crypt(value, seed);</a> |
| <span class="sourceLineNo">092</span><a id="line.92"> }</a> |
| <span class="sourceLineNo">093</span><a id="line.93">}</a> |
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| </pre> |
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