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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing,<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * software distributed under the License is distributed on an<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * KIND, either express or implied. See the License for the<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * specific language governing permissions and limitations<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> */<a name="line.18"></a> |
| <span class="sourceLineNo">019</span>package org.apache.shiro.crypto;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>/**<a name="line.21"></a> |
| <span class="sourceLineNo">022</span> * {@code CipherService} using the {@code Blowfish} cipher algorithm for all encryption, decryption, and key operations.<a name="line.22"></a> |
| <span class="sourceLineNo">023</span> * <p/><a name="line.23"></a> |
| <span class="sourceLineNo">024</span> * The Blowfish algorithm can support key sizes between {@code 32} and {@code 448} bits<b>*</b>, inclusive. However,<a name="line.24"></a> |
| <span class="sourceLineNo">025</span> * modern cryptanalysis techniques render keys of 80 bits or less mostly worthless - use {@code 128} or more whenever<a name="line.25"></a> |
| <span class="sourceLineNo">026</span> * possible.<a name="line.26"></a> |
| <span class="sourceLineNo">027</span> * <p/><a name="line.27"></a> |
| <span class="sourceLineNo">028</span> * Note that this class retains the parent class's default {@link OperationMode#CBC CBC} mode of operation<a name="line.28"></a> |
| <span class="sourceLineNo">029</span> * instead of the typical JDK default of {@link OperationMode#ECB ECB}. {@code ECB} should not be used in<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> * security-sensitive environments because {@code ECB} does not allow for initialization vectors, which are<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> * considered necessary for strong encryption. See the {@link DefaultBlockCipherService parent class}'s JavaDoc and the<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> * {@link JcaCipherService JcaCipherService} JavaDoc for more on why the JDK default should not be used and is not<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> * used in this implementation.<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> * <p/><a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * <b>*</b> Generating and using Blowfish key sizes greater than 128 require installation of the<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> * <a href="http://java.sun.com/javase/downloads/index.jsp">Java Cryptography Extension (JCE) Unlimited Strength<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * Jurisdiction Policy files</a>.<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> *<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * @since 1.0<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> */<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>public class BlowfishCipherService extends DefaultBlockCipherService {<a name="line.41"></a> |
| <span class="sourceLineNo">042</span><a name="line.42"></a> |
| <span class="sourceLineNo">043</span> private static final String ALGORITHM_NAME = "Blowfish";<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> private static final int BLOCK_SIZE = 64;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> /**<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * Creates a new {@link CipherService} instance using the {@code Blowfish} cipher algorithm with the following<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * important cipher default attributes:<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * <table><a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * <tr><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * <th>Attribute</th><a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * <th>Value</th><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * </tr><a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * <tr><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * <td>{@link #setKeySize keySize}</td><a name="line.55"></a> |
| <span class="sourceLineNo">056</span> * <td>{@code 128} bits</td><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> * </tr><a name="line.57"></a> |
| <span class="sourceLineNo">058</span> * <tr><a name="line.58"></a> |
| <span class="sourceLineNo">059</span> * <td>{@link #setBlockSize blockSize}</td><a name="line.59"></a> |
| <span class="sourceLineNo">060</span> * <td>{@code 64} bits (required for {@code Blowfish})</td><a name="line.60"></a> |
| <span class="sourceLineNo">061</span> * </tr><a name="line.61"></a> |
| <span class="sourceLineNo">062</span> * <tr><a name="line.62"></a> |
| <span class="sourceLineNo">063</span> * <td>{@link #setMode mode}</td><a name="line.63"></a> |
| <span class="sourceLineNo">064</span> * <td>{@link OperationMode#CBC CBC}<b>*</b></td><a name="line.64"></a> |
| <span class="sourceLineNo">065</span> * </tr><a name="line.65"></a> |
| <span class="sourceLineNo">066</span> * <tr><a name="line.66"></a> |
| <span class="sourceLineNo">067</span> * <td>{@link #setPaddingScheme paddingScheme}</td><a name="line.67"></a> |
| <span class="sourceLineNo">068</span> * <td>{@link PaddingScheme#PKCS5 PKCS5}</td><a name="line.68"></a> |
| <span class="sourceLineNo">069</span> * </tr><a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * <tr><a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * <td>{@link #setInitializationVectorSize(int) initializationVectorSize}</td><a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * <td>{@code 64} bits</td><a name="line.72"></a> |
| <span class="sourceLineNo">073</span> * </tr><a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * <tr><a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * <td>{@link #setGenerateInitializationVectors(boolean) generateInitializationVectors}</td><a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * <td>{@code true}<b>**</b></td><a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * </tr><a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * </table><a name="line.78"></a> |
| <span class="sourceLineNo">079</span> * <p/><a name="line.79"></a> |
| <span class="sourceLineNo">080</span> * <b>*</b> The {@link OperationMode#CBC CBC} operation mode is used instead of the JDK default {@code ECB} to<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> * ensure strong encryption. {@code ECB} should not be used in security-sensitive environments - see the<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> * {@link DefaultBlockCipherService DefaultBlockCipherService} class JavaDoc's &quot;Operation Mode&quot; section<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> * for more.<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> * <p/><a name="line.84"></a> |
| <span class="sourceLineNo">085</span> * <b>**</b>In conjunction with the default {@code CBC} operation mode, initialization vectors are generated by<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> * default to ensure strong encryption. See the {@link JcaCipherService JcaCipherService} class JavaDoc for more.<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> */<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> public BlowfishCipherService() {<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> super(ALGORITHM_NAME);<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> setInitializationVectorSize(BLOCK_SIZE); //like most block ciphers, the IV size is the same as the block size<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> }<a name="line.91"></a> |
| <span class="sourceLineNo">092</span>}<a name="line.92"></a> |
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