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1   package org.apache.maven.plugin.install;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import java.io.File;
23  
24  import org.codehaus.plexus.digest.Digester;
25  import org.codehaus.plexus.digest.Md5Digester;
26  import org.codehaus.plexus.digest.Sha1Digester;
27  import org.codehaus.plexus.util.FileUtils;
28  
29  /**
30   * A utility class to assist testing.
31   * 
32   * @author Benjamin Bentmann
33   * @version $Id: Utils.html 831044 2012-09-03 20:19:45Z olamy $
34   */
35  public class Utils
36  {
37  
38      /**
39       * Verifies a checksum file in the local repo.
40       * 
41       * @param checksumFile The checksum file to verify, must not be <code>null</code>.
42       * @throws Exception If the verification failed.
43       */
44      public static void verifyChecksum( File checksumFile )
45          throws Exception
46      {
47          File dataFile;
48          Digester digester;
49          if ( checksumFile.getName().endsWith( ".md5" ) )
50          {
51              digester = new Md5Digester();
52              dataFile = new File( checksumFile.getPath().substring( 0, checksumFile.getPath().length() - 4 ) );
53          }
54          else if ( checksumFile.getName().endsWith( ".sha1" ) )
55          {
56              digester = new Sha1Digester();
57              dataFile = new File( checksumFile.getPath().substring( 0, checksumFile.getPath().length() - 5 ) );
58          }
59          else
60          {
61              throw new IllegalArgumentException( "Unsupported checksum file: " + checksumFile );
62          }
63  
64          String expected = FileUtils.fileRead( checksumFile, "UTF-8" );
65          digester.verify( dataFile, expected );
66      }
67  
68  }