| package org.apache.maven.plugin.install; |
| |
| /* |
| * 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 |
| * "License"); 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 |
| * "AS IS" 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.io.BufferedInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| |
| import org.apache.commons.codec.binary.Hex; |
| import org.apache.maven.plugin.MojoExecutionException; |
| import org.codehaus.plexus.util.IOUtil; |
| |
| |
| /** |
| * Calculates md5 and sha1 digest. |
| * <p/> |
| * Todo: Consider using a thread to calculate one of the digests when the files are large; it's fairly slow ! |
| * |
| * @author Kristian Rosenvold |
| */ |
| public class DualDigester |
| { |
| private final MessageDigest md5 = getDigester( "MD5" ); |
| |
| private final MessageDigest sh1 = getDigester( "SHA-1" ); |
| |
| private static final int BUFSIZE = 65536 * 2; |
| |
| private final byte[] buffer = new byte[BUFSIZE]; |
| |
| static MessageDigest getDigester( String algorithm ) |
| { |
| try |
| { |
| return MessageDigest.getInstance( algorithm ); |
| } |
| catch ( NoSuchAlgorithmException e ) |
| { |
| throw new RuntimeException( "Unable to initialize digest " + algorithm + " : " + e.getMessage() ); |
| } |
| } |
| |
| public void calculate( File file ) |
| throws MojoExecutionException |
| { |
| FileInputStream fis = null; |
| BufferedInputStream bis = null; |
| |
| try |
| { |
| fis = new FileInputStream( file ); |
| calculate( fis ); |
| } |
| catch ( IOException e ) |
| { |
| throw new MojoExecutionException( "Failed to calculate digest checksum for " + file, e ); |
| } |
| finally |
| { |
| IOUtil.close( bis ); |
| IOUtil.close( fis ); |
| } |
| } |
| |
| void calculate( InputStream stream ) |
| throws IOException |
| { |
| md5.reset(); |
| sh1.reset(); |
| update( stream ); |
| } |
| |
| public String getMd5() |
| { |
| return Hex.encodeHexString( md5.digest() ); |
| } |
| |
| public String getSha1() |
| { |
| return Hex.encodeHexString( sh1.digest() ); |
| } |
| |
| private void update( InputStream is ) |
| throws IOException |
| { |
| int size = is.read( buffer, 0, BUFSIZE ); |
| while ( size >= 0 ) |
| { |
| md5.update( buffer, 0, size ); |
| sh1.update( buffer, 0, size ); |
| size = is.read( buffer, 0, BUFSIZE ); |
| } |
| } |
| } |