1 package org.apache.maven.plugin.install;
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22 import java.io.File;
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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;
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35 public class Utils
36 {
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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 }
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64 String expected = FileUtils.fileRead( checksumFile, "UTF-8" );
65 digester.verify( dataFile, expected );
66 }
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68 }