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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* &quot;License&quot;); 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
* &quot;AS IS&quot; 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.
*/
import java.util.Random;
import org.apache.fulcrum.crypto.CryptoAlgorithm;
/**
* Implements Standard Unix crypt(3) for use with the Crypto Service.
*
* @author &lt;a href=&quot;mailto:hps@intermeta.de&quot;&gt;Henning P. Schmiedehausen&lt;/a&gt;
* @version $Id$
*/
public class UnixCrypt implements CryptoAlgorithm
{
/** The seed to use */
<span class="fc" id="L36"> private String seed = null;</span>
/** standard Unix crypt chars (64) */
<span class="fc" id="L39"> private static final char[] SALT_CHARS = &quot;abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./&quot;</span>
<span class="fc" id="L40"> .toCharArray();</span>
/**
* Constructor
*/
public UnixCrypt()
<span class="fc" id="L46"> {</span>
<span class="fc" id="L47"> }</span>
/**
* This class never uses anything but UnixCrypt, so it is just a dummy (Fixme:
* Should we throw an exception if something is requested that we don't support?
*
* @param cipher Cipher (ignored)
*/
public void setCipher(String cipher)
{
/* dummy */
<span class="fc" id="L58"> }</span>
/**
* Setting the seed for the UnixCrypt algorithm. If a null value is supplied, or
* no seed is set, then a random seed is used.
*
* @param seed The seed value to use.
*/
public void setSeed(String seed)
{
<span class="fc" id="L68"> this.seed = seed;</span>
<span class="fc" id="L69"> }</span>
/**
* Encrypt the supplied string with the requested cipher
*
* @param value The value to be encrypted
* @return The encrypted value
* @throws Exception An Exception of the underlying implementation.
*/
public String encrypt(String value) throws Exception
{
<span class="fc bfc" id="L80" title="All 2 branches covered."> if (seed == null) </span>
{
<span class="fc" id="L82"> Random randomGenerator = new Random();</span>
<span class="fc" id="L83"> int numSaltChars = SALT_CHARS.length;</span>
<span class="fc" id="L84"> StringBuilder sb = new StringBuilder();</span>
<span class="fc" id="L85"> sb.append(SALT_CHARS[Math.abs(randomGenerator.nextInt() % numSaltChars)])</span>
<span class="fc" id="L86"> .append(SALT_CHARS[Math.abs(randomGenerator.nextInt() % numSaltChars)]).toString();</span>
<span class="fc" id="L87"> seed = sb.toString();</span>
}
// use commons-codec to do the encryption
<span class="fc" id="L91"> return org.apache.commons.codec.digest.UnixCrypt.crypt(value, seed);</span>
}
}
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