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| <FONT color="green">001</FONT> package org.apache.archiva.checksum;<a name="line.1"></a> |
| <FONT color="green">002</FONT> <a name="line.2"></a> |
| <FONT color="green">003</FONT> /*<a name="line.3"></a> |
| <FONT color="green">004</FONT> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.4"></a> |
| <FONT color="green">005</FONT> * or more contributor license agreements. See the NOTICE file<a name="line.5"></a> |
| <FONT color="green">006</FONT> * distributed with this work for additional information<a name="line.6"></a> |
| <FONT color="green">007</FONT> * regarding copyright ownership. The ASF licenses this file<a name="line.7"></a> |
| <FONT color="green">008</FONT> * to you under the Apache License, Version 2.0 (the<a name="line.8"></a> |
| <FONT color="green">009</FONT> * "License"); you may not use this file except in compliance<a name="line.9"></a> |
| <FONT color="green">010</FONT> * with the License. You may obtain a copy of the License at<a name="line.10"></a> |
| <FONT color="green">011</FONT> *<a name="line.11"></a> |
| <FONT color="green">012</FONT> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.12"></a> |
| <FONT color="green">013</FONT> *<a name="line.13"></a> |
| <FONT color="green">014</FONT> * Unless required by applicable law or agreed to in writing,<a name="line.14"></a> |
| <FONT color="green">015</FONT> * software distributed under the License is distributed on an<a name="line.15"></a> |
| <FONT color="green">016</FONT> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.16"></a> |
| <FONT color="green">017</FONT> * KIND, either express or implied. See the License for the<a name="line.17"></a> |
| <FONT color="green">018</FONT> * specific language governing permissions and limitations<a name="line.18"></a> |
| <FONT color="green">019</FONT> * under the License.<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> import java.io.IOException;<a name="line.22"></a> |
| <FONT color="green">023</FONT> import java.io.InputStream;<a name="line.23"></a> |
| <FONT color="green">024</FONT> import java.security.DigestInputStream;<a name="line.24"></a> |
| <FONT color="green">025</FONT> import java.security.MessageDigest;<a name="line.25"></a> |
| <FONT color="green">026</FONT> import java.security.NoSuchAlgorithmException;<a name="line.26"></a> |
| <FONT color="green">027</FONT> import java.util.List;<a name="line.27"></a> |
| <FONT color="green">028</FONT> <a name="line.28"></a> |
| <FONT color="green">029</FONT> import org.apache.commons.io.IOUtils;<a name="line.29"></a> |
| <FONT color="green">030</FONT> import org.apache.commons.io.output.NullOutputStream;<a name="line.30"></a> |
| <FONT color="green">031</FONT> <a name="line.31"></a> |
| <FONT color="green">032</FONT> /**<a name="line.32"></a> |
| <FONT color="green">033</FONT> * Checksum - simple checksum hashing routines. <a name="line.33"></a> |
| <FONT color="green">034</FONT> *<a name="line.34"></a> |
| <FONT color="green">035</FONT> *<a name="line.35"></a> |
| <FONT color="green">036</FONT> */<a name="line.36"></a> |
| <FONT color="green">037</FONT> public class Checksum<a name="line.37"></a> |
| <FONT color="green">038</FONT> {<a name="line.38"></a> |
| <FONT color="green">039</FONT> private static final int BUFFER_SIZE = 32768;<a name="line.39"></a> |
| <FONT color="green">040</FONT> <a name="line.40"></a> |
| <FONT color="green">041</FONT> public static void update( List<Checksum> checksums, InputStream stream )<a name="line.41"></a> |
| <FONT color="green">042</FONT> throws IOException<a name="line.42"></a> |
| <FONT color="green">043</FONT> {<a name="line.43"></a> |
| <FONT color="green">044</FONT> byte[] buffer = new byte[BUFFER_SIZE];<a name="line.44"></a> |
| <FONT color="green">045</FONT> int size = stream.read( buffer, 0, BUFFER_SIZE );<a name="line.45"></a> |
| <FONT color="green">046</FONT> while ( size >= 0 )<a name="line.46"></a> |
| <FONT color="green">047</FONT> {<a name="line.47"></a> |
| <FONT color="green">048</FONT> for ( Checksum checksum : checksums )<a name="line.48"></a> |
| <FONT color="green">049</FONT> {<a name="line.49"></a> |
| <FONT color="green">050</FONT> checksum.update( buffer, 0, size );<a name="line.50"></a> |
| <FONT color="green">051</FONT> }<a name="line.51"></a> |
| <FONT color="green">052</FONT> size = stream.read( buffer, 0, BUFFER_SIZE );<a name="line.52"></a> |
| <FONT color="green">053</FONT> }<a name="line.53"></a> |
| <FONT color="green">054</FONT> }<a name="line.54"></a> |
| <FONT color="green">055</FONT> <a name="line.55"></a> |
| <FONT color="green">056</FONT> protected final MessageDigest md;<a name="line.56"></a> |
| <FONT color="green">057</FONT> <a name="line.57"></a> |
| <FONT color="green">058</FONT> private ChecksumAlgorithm checksumAlgorithm;<a name="line.58"></a> |
| <FONT color="green">059</FONT> <a name="line.59"></a> |
| <FONT color="green">060</FONT> public Checksum( ChecksumAlgorithm checksumAlgorithm )<a name="line.60"></a> |
| <FONT color="green">061</FONT> {<a name="line.61"></a> |
| <FONT color="green">062</FONT> this.checksumAlgorithm = checksumAlgorithm;<a name="line.62"></a> |
| <FONT color="green">063</FONT> try<a name="line.63"></a> |
| <FONT color="green">064</FONT> {<a name="line.64"></a> |
| <FONT color="green">065</FONT> md = MessageDigest.getInstance( checksumAlgorithm.getAlgorithm() );<a name="line.65"></a> |
| <FONT color="green">066</FONT> }<a name="line.66"></a> |
| <FONT color="green">067</FONT> catch ( NoSuchAlgorithmException e )<a name="line.67"></a> |
| <FONT color="green">068</FONT> {<a name="line.68"></a> |
| <FONT color="green">069</FONT> // Not really possible, but here none-the-less<a name="line.69"></a> |
| <FONT color="green">070</FONT> throw new IllegalStateException( "Unable to initialize MessageDigest algorithm " + checksumAlgorithm.getAlgorithm()<a name="line.70"></a> |
| <FONT color="green">071</FONT> + " : " + e.getMessage(), e );<a name="line.71"></a> |
| <FONT color="green">072</FONT> }<a name="line.72"></a> |
| <FONT color="green">073</FONT> }<a name="line.73"></a> |
| <FONT color="green">074</FONT> <a name="line.74"></a> |
| <FONT color="green">075</FONT> public String getChecksum()<a name="line.75"></a> |
| <FONT color="green">076</FONT> {<a name="line.76"></a> |
| <FONT color="green">077</FONT> return Hex.encode( md.digest() );<a name="line.77"></a> |
| <FONT color="green">078</FONT> }<a name="line.78"></a> |
| <FONT color="green">079</FONT> <a name="line.79"></a> |
| <FONT color="green">080</FONT> public ChecksumAlgorithm getAlgorithm()<a name="line.80"></a> |
| <FONT color="green">081</FONT> {<a name="line.81"></a> |
| <FONT color="green">082</FONT> return this.checksumAlgorithm;<a name="line.82"></a> |
| <FONT color="green">083</FONT> }<a name="line.83"></a> |
| <FONT color="green">084</FONT> <a name="line.84"></a> |
| <FONT color="green">085</FONT> public void reset()<a name="line.85"></a> |
| <FONT color="green">086</FONT> {<a name="line.86"></a> |
| <FONT color="green">087</FONT> md.reset();<a name="line.87"></a> |
| <FONT color="green">088</FONT> }<a name="line.88"></a> |
| <FONT color="green">089</FONT> <a name="line.89"></a> |
| <FONT color="green">090</FONT> public Checksum update( byte[] buffer, int offset, int size )<a name="line.90"></a> |
| <FONT color="green">091</FONT> {<a name="line.91"></a> |
| <FONT color="green">092</FONT> md.update( buffer, 0, size );<a name="line.92"></a> |
| <FONT color="green">093</FONT> return this;<a name="line.93"></a> |
| <FONT color="green">094</FONT> }<a name="line.94"></a> |
| <FONT color="green">095</FONT> <a name="line.95"></a> |
| <FONT color="green">096</FONT> public Checksum update( InputStream stream )<a name="line.96"></a> |
| <FONT color="green">097</FONT> throws IOException<a name="line.97"></a> |
| <FONT color="green">098</FONT> {<a name="line.98"></a> |
| <FONT color="green">099</FONT> DigestInputStream dig = new DigestInputStream( stream, md );<a name="line.99"></a> |
| <FONT color="green">100</FONT> IOUtils.copy( dig, new NullOutputStream() );<a name="line.100"></a> |
| <FONT color="green">101</FONT> <a name="line.101"></a> |
| <FONT color="green">102</FONT> return this;<a name="line.102"></a> |
| <FONT color="green">103</FONT> }<a name="line.103"></a> |
| <FONT color="green">104</FONT> }<a name="line.104"></a> |
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| </PRE> |
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