| package org.apache.maven.index.packer; |
| |
| /* |
| * 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.ByteArrayInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.UnsupportedEncodingException; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| |
| import org.codehaus.plexus.util.IOUtil; |
| |
| /** |
| * A util class to calculate various digests on Strings. Useful for some simple password management. |
| * |
| * @author cstamas |
| */ |
| public class DigesterUtils |
| { |
| /** |
| * Calculates a digest for a String user the requested algorithm. |
| * |
| * @param alg |
| * @param content |
| * @return |
| * @throws NoSuchAlgorithmException |
| */ |
| private static String getDigest( String alg, InputStream is ) |
| throws NoSuchAlgorithmException |
| { |
| String result = null; |
| |
| try |
| { |
| try |
| { |
| byte[] buffer = new byte[1024]; |
| |
| MessageDigest md = MessageDigest.getInstance( alg ); |
| |
| int numRead; |
| |
| do |
| { |
| numRead = is.read( buffer ); |
| |
| if ( numRead > 0 ) |
| { |
| md.update( buffer, 0, numRead ); |
| } |
| } |
| while ( numRead != -1 ); |
| |
| result = new String( encodeHex( md.digest() ) ); |
| } |
| finally |
| { |
| is.close(); |
| } |
| } |
| catch ( IOException e ) |
| { |
| // hrm |
| result = null; |
| } |
| |
| return result; |
| } |
| |
| // SHA1 |
| |
| /** |
| * Calculates a SHA1 digest for a string. |
| * |
| * @param content |
| * @return |
| */ |
| public static String getSha1Digest( String content ) |
| { |
| try |
| { |
| InputStream fis = new ByteArrayInputStream( content.getBytes( "UTF-8" ) ); |
| |
| return getDigest( "SHA1", fis ); |
| } |
| catch ( NoSuchAlgorithmException e ) |
| { |
| // will not happen |
| return null; |
| } |
| catch ( UnsupportedEncodingException e ) |
| { |
| // will not happen |
| return null; |
| } |
| } |
| |
| /** |
| * Calculates a SHA1 digest for a stream. |
| * |
| * @param content |
| * @return |
| */ |
| public static String getSha1Digest( InputStream is ) |
| { |
| try |
| { |
| return getDigest( "SHA1", is ); |
| } |
| catch ( NoSuchAlgorithmException e ) |
| { |
| // will not happen |
| return null; |
| } |
| } |
| |
| /** |
| * Calculates a SHA1 digest for a file. |
| * |
| * @param content |
| * @return |
| */ |
| public static String getSha1Digest( File file ) |
| { |
| FileInputStream fis = null; |
| |
| try |
| { |
| fis = new FileInputStream( file ); |
| |
| return getDigest( "SHA1", fis ); |
| } |
| catch ( NoSuchAlgorithmException e ) |
| { |
| // will not happen |
| return null; |
| } |
| catch ( FileNotFoundException e ) |
| { |
| // will not happen |
| return null; |
| } |
| finally |
| { |
| IOUtil.close( fis ); |
| } |
| } |
| |
| // MD5 |
| |
| /** |
| * Calculates a SHA1 digest for a string. |
| * |
| * @param content |
| * @return |
| */ |
| public static String getMd5Digest( String content ) |
| { |
| try |
| { |
| InputStream fis = new ByteArrayInputStream( content.getBytes( "UTF-8" ) ); |
| |
| return getDigest( "MD5", fis ); |
| } |
| catch ( NoSuchAlgorithmException e ) |
| { |
| // will not happen |
| return null; |
| } |
| catch ( UnsupportedEncodingException e ) |
| { |
| // will not happen |
| return null; |
| } |
| } |
| |
| /** |
| * Calculates a SHA1 digest for a stream. |
| * |
| * @param content |
| * @return |
| */ |
| public static String getMd5Digest( InputStream is ) |
| { |
| try |
| { |
| return getDigest( "MD5", is ); |
| } |
| catch ( NoSuchAlgorithmException e ) |
| { |
| // will not happen |
| return null; |
| } |
| } |
| |
| /** |
| * Calculates a SHA1 digest for a file. |
| * |
| * @param content |
| * @return |
| */ |
| public static String getMd5Digest( File file ) |
| { |
| FileInputStream fis = null; |
| |
| try |
| { |
| fis = new FileInputStream( file ); |
| |
| return getDigest( "MD5", fis ); |
| } |
| catch ( NoSuchAlgorithmException e ) |
| { |
| // will not happen |
| return null; |
| } |
| catch ( FileNotFoundException e ) |
| { |
| // will not happen |
| return null; |
| } |
| finally |
| { |
| IOUtil.close( fis ); |
| } |
| } |
| |
| // -- |
| |
| private static final char[] DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', |
| 'f' }; |
| |
| /** |
| * Blatantly copied from commons-codec version 1.3 |
| * |
| * @param data |
| * @return |
| */ |
| public static char[] encodeHex( byte[] data ) |
| { |
| int l = data.length; |
| |
| char[] out = new char[l << 1]; |
| |
| // two characters form the hex value. |
| for ( int i = 0, j = 0; i < l; i++ ) |
| { |
| out[j++] = DIGITS[( 0xF0 & data[i] ) >>> 4]; |
| out[j++] = DIGITS[0x0F & data[i]]; |
| } |
| |
| return out; |
| } |
| |
| } |