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| <pre><span class="sourceLineNo">001</span><a id="line.1">/*</a> |
| <span class="sourceLineNo">002</span><a id="line.2"> * Licensed to the Apache Software Foundation (ASF) under one</a> |
| <span class="sourceLineNo">003</span><a id="line.3"> * or more contributor license agreements. See the NOTICE file</a> |
| <span class="sourceLineNo">004</span><a id="line.4"> * distributed with this work for additional information</a> |
| <span class="sourceLineNo">005</span><a id="line.5"> * regarding copyright ownership. The ASF licenses this file</a> |
| <span class="sourceLineNo">006</span><a id="line.6"> * to you under the Apache License, Version 2.0 (the</a> |
| <span class="sourceLineNo">007</span><a id="line.7"> * "License"); you may not use this file except in compliance</a> |
| <span class="sourceLineNo">008</span><a id="line.8"> * with the License. You may obtain a copy of the License at</a> |
| <span class="sourceLineNo">009</span><a id="line.9"> *</a> |
| <span class="sourceLineNo">010</span><a id="line.10"> * http://www.apache.org/licenses/LICENSE-2.0</a> |
| <span class="sourceLineNo">011</span><a id="line.11"> *</a> |
| <span class="sourceLineNo">012</span><a id="line.12"> * Unless required by applicable law or agreed to in writing,</a> |
| <span class="sourceLineNo">013</span><a id="line.13"> * software distributed under the License is distributed on an</a> |
| <span class="sourceLineNo">014</span><a id="line.14"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</a> |
| <span class="sourceLineNo">015</span><a id="line.15"> * KIND, either express or implied. See the License for the</a> |
| <span class="sourceLineNo">016</span><a id="line.16"> * specific language governing permissions and limitations</a> |
| <span class="sourceLineNo">017</span><a id="line.17"> * under the License.</a> |
| <span class="sourceLineNo">018</span><a id="line.18"> */</a> |
| <span class="sourceLineNo">019</span><a id="line.19">package org.apache.shiro.crypto;</a> |
| <span class="sourceLineNo">020</span><a id="line.20"></a> |
| <span class="sourceLineNo">021</span><a id="line.21">import javax.crypto.KeyGenerator;</a> |
| <span class="sourceLineNo">022</span><a id="line.22">import java.security.Key;</a> |
| <span class="sourceLineNo">023</span><a id="line.23">import java.security.NoSuchAlgorithmException;</a> |
| <span class="sourceLineNo">024</span><a id="line.24"></a> |
| <span class="sourceLineNo">025</span><a id="line.25">/**</a> |
| <span class="sourceLineNo">026</span><a id="line.26"> * Base abstract class for supporting symmetric key cipher algorithms.</a> |
| <span class="sourceLineNo">027</span><a id="line.27"> *</a> |
| <span class="sourceLineNo">028</span><a id="line.28"> * @since 1.0</a> |
| <span class="sourceLineNo">029</span><a id="line.29"> */</a> |
| <span class="sourceLineNo">030</span><a id="line.30">public abstract class AbstractSymmetricCipherService extends JcaCipherService {</a> |
| <span class="sourceLineNo">031</span><a id="line.31"></a> |
| <span class="sourceLineNo">032</span><a id="line.32"> protected AbstractSymmetricCipherService(String algorithmName) {</a> |
| <span class="sourceLineNo">033</span><a id="line.33"> super(algorithmName);</a> |
| <span class="sourceLineNo">034</span><a id="line.34"> }</a> |
| <span class="sourceLineNo">035</span><a id="line.35"></a> |
| <span class="sourceLineNo">036</span><a id="line.36"> /**</a> |
| <span class="sourceLineNo">037</span><a id="line.37"> * Generates a new {@link java.security.Key Key} suitable for this CipherService's {@link #getAlgorithmName() algorithm}</a> |
| <span class="sourceLineNo">038</span><a id="line.38"> * by calling {@link #generateNewKey(int) generateNewKey(128)} (uses a 128 bit size by default).</a> |
| <span class="sourceLineNo">039</span><a id="line.39"> *</a> |
| <span class="sourceLineNo">040</span><a id="line.40"> * @return a new {@link java.security.Key Key}, 128 bits in length.</a> |
| <span class="sourceLineNo">041</span><a id="line.41"> */</a> |
| <span class="sourceLineNo">042</span><a id="line.42"> public Key generateNewKey() {</a> |
| <span class="sourceLineNo">043</span><a id="line.43"> return generateNewKey(getKeySize());</a> |
| <span class="sourceLineNo">044</span><a id="line.44"> }</a> |
| <span class="sourceLineNo">045</span><a id="line.45"></a> |
| <span class="sourceLineNo">046</span><a id="line.46"> /**</a> |
| <span class="sourceLineNo">047</span><a id="line.47"> * Generates a new {@link Key Key} of the specified size suitable for this CipherService</a> |
| <span class="sourceLineNo">048</span><a id="line.48"> * (based on the {@link #getAlgorithmName() algorithmName} using the JDK {@link javax.crypto.KeyGenerator KeyGenerator}.</a> |
| <span class="sourceLineNo">049</span><a id="line.49"> *</a> |
| <span class="sourceLineNo">050</span><a id="line.50"> * @param keyBitSize the bit size of the key to create</a> |
| <span class="sourceLineNo">051</span><a id="line.51"> * @return the created key suitable for use with this CipherService</a> |
| <span class="sourceLineNo">052</span><a id="line.52"> */</a> |
| <span class="sourceLineNo">053</span><a id="line.53"> public Key generateNewKey(int keyBitSize) {</a> |
| <span class="sourceLineNo">054</span><a id="line.54"> KeyGenerator kg;</a> |
| <span class="sourceLineNo">055</span><a id="line.55"> try {</a> |
| <span class="sourceLineNo">056</span><a id="line.56"> kg = KeyGenerator.getInstance(getAlgorithmName());</a> |
| <span class="sourceLineNo">057</span><a id="line.57"> } catch (NoSuchAlgorithmException e) {</a> |
| <span class="sourceLineNo">058</span><a id="line.58"> String msg = "Unable to acquire " + getAlgorithmName() + " algorithm. This is required to function.";</a> |
| <span class="sourceLineNo">059</span><a id="line.59"> throw new IllegalStateException(msg, e);</a> |
| <span class="sourceLineNo">060</span><a id="line.60"> }</a> |
| <span class="sourceLineNo">061</span><a id="line.61"> kg.init(keyBitSize);</a> |
| <span class="sourceLineNo">062</span><a id="line.62"> return kg.generateKey();</a> |
| <span class="sourceLineNo">063</span><a id="line.63"> }</a> |
| <span class="sourceLineNo">064</span><a id="line.64"></a> |
| <span class="sourceLineNo">065</span><a id="line.65">}</a> |
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