OpenConcerto

Dépôt officiel du code source de l'ERP OpenConcerto
sonarqube

svn://code.openconcerto.org/openconcerto

Rev

Rev 94 | Rev 177 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
61 ilm 1 
/*
2 
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 
 *
4 
 * Copyright 2011 OpenConcerto, by ILM Informatique. All rights reserved.
5 
 *
6 
 * The contents of this file are subject to the terms of the GNU General Public License Version 3
7 
 * only ("GPL"). You may not use this file except in compliance with the License. You can obtain a
8 
 * copy of the License at http://www.gnu.org/licenses/gpl-3.0.html See the License for the specific
9 
 * language governing permissions and limitations under the License.
10 
 *
11 
 * When distributing the software, include this License Header Notice in each file.
12 
 */
13 
 
14 
 package org.openconcerto.utils.sync;
15 
 
174 ilm 16 
import org.openconcerto.utils.MessageDigestUtils;
17 
 
61 ilm 18 
import java.io.BufferedInputStream;
19 
import java.io.BufferedOutputStream;
20 
import java.io.DataOutputStream;
21 
import java.io.File;
22 
import java.io.FileInputStream;
23 
import java.io.FileOutputStream;
93 ilm 24 
import java.io.IOException;
61 ilm 25 
import java.security.MessageDigest;
26 
 
27 
public class HashWriter {
93 ilm 28 
    public static final int BLOCK_SIZE = 1024;
61 ilm 29 
    private File in;
30 
 
31 
    public HashWriter(File inputFile) {
32 
        this.in = inputFile;
33 
    }
34 
 
35 
    public void saveHash(File outputFile) {
93 ilm 36 
        BufferedInputStream fb = null;
61 ilm 37 
        try {
38 
            if (!outputFile.exists()) {
39 
                new File(outputFile.getParent()).mkdirs();
40 
            }
93 ilm 41 
            final DataOutputStream bOut = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(outputFile)));
61 ilm 42 
            bOut.writeInt((int) this.in.length());
174 ilm 43 
            final MessageDigest hashSum = MessageDigestUtils.getSHA256();
44 
            final MessageDigest md5 = MessageDigestUtils.getMD5();
93 ilm 45 
            fb = new BufferedInputStream(new FileInputStream(in));
46 
            final RollingChecksum32 r32 = new RollingChecksum32();
47 
            final byte[] buffer = new byte[BLOCK_SIZE];
61 ilm 48 
            int readSize = fb.read(buffer);
49 
            while (readSize > 0) {
50 
                // Update
51 
                r32.check(buffer, 0, readSize);
52 
                md5.reset();
53 
                md5.update(buffer, 0, readSize);
54 
                hashSum.update(buffer, 0, readSize);
55 
                // read
56 
                readSize = fb.read(buffer);
57 
                final byte[] engineDigest = md5.digest();
58 
                bOut.writeInt(r32.getValue());
59 
                bOut.write(engineDigest);
60 
            }
61 
            byte[] fileHash = new byte[hashSum.getDigestLength()];
62 
            fileHash = hashSum.digest();
63 
            bOut.write(fileHash);
64 
            bOut.close();
65 
 
66 
        } catch (Exception e) {
67 
            e.printStackTrace();
93 ilm 68 
        } finally {
69 
            if (fb != null) {
70 
                try {
71 
                    fb.close();
72 
                } catch (IOException e) {
73 
                    e.printStackTrace();
74 
                }
75 
            }
61 ilm 76 
        }
77 
    }
78 
 
174 ilm 79 
    public static byte[] getHash(File f) throws IOException {
80 
        final MessageDigest hashSum = MessageDigestUtils.getSHA256();
94 ilm 81 
        FileInputStream fIn = null;
82 
        try {
83 
            fIn = new FileInputStream(f);
84 
            BufferedInputStream fb = null;
85 
            try {
86 
                fb = new BufferedInputStream(fIn);
87 
                final byte[] buffer = new byte[BLOCK_SIZE];
88 
                int readSize = fb.read(buffer);
89 
                while (readSize > 0) {
90 
                    // Update
91 
                    hashSum.update(buffer, 0, readSize);
92 
                    // read
93 
                    readSize = fb.read(buffer);
94 
                }
95 
            } catch (Exception e) {
96 
                throw new IOException(e);
97 
            } finally {
98 
                if (fb != null) {
99 
                    fb.close();
100 
                }
101 
            }
102 
        } catch (Exception e) {
103 
            throw new IOException(e);
104 
        } finally {
105 
            if (fIn != null) {
106 
                fIn.close();
107 
            }
61 ilm 108 
        }
94 ilm 109 
 
61 ilm 110 
        byte[] fileHash = new byte[hashSum.getDigestLength()];
111 
        fileHash = hashSum.digest();
112 
        return fileHash;
113 
    }
114 
 
115 
    public static boolean compareHash(byte[] h1, byte[] h2) {
116 
        final int length = h1.length;
117 
        if (length != h2.length) {
118 
            return false;
119 
        }
120 
        for (int i = 0; i < length; i++) {
121 
            if (h1[i] != h2[i]) {
122 
                return false;
123 
            }
124 
        }
125 
        return true;
126 
    }
127 
 
174 ilm 128 
    private static final char[] hexArray = "0123456789ABCDEF".toCharArray();
129 
 
130 
    public static String bytesToHex(byte[] bytes) {
131 
        char[] hexChars = new char[bytes.length * 2];
132 
        for (int j = 0; j < bytes.length; j++) {
133 
            int v = bytes[j] & 0xFF;
134 
            hexChars[j * 2] = hexArray[v >>> 4];
135 
            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
136 
        }
137 
        return new String(hexChars);
138 
    }
61 ilm 139 
}