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