Java MD5 Sum md5sum(File f, char[] cbuf, MessageDigest digest, byte[] bbuf)

Description

mdsum

License

LGPL

Declaration

public static void md5sum(File f, char[] cbuf, MessageDigest digest, byte[] bbuf) throws IOException 

Method Source Code

//package com.java2s;
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1//from  ww  w.  jav a 2s  . co  m
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
 * Java(TM), hosted at http://sourceforge.net/projects/dcm4che.
 *
 * The Initial Developer of the Original Code is
 * TIANI Medgraph AG.
 * Portions created by the Initial Developer are Copyright (C) 2002-2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * Gunter Zeilinger <gunter.zeilinger@tiani.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

import java.io.File;
import java.io.FileInputStream;

import java.io.IOException;
import java.io.InputStream;

import java.security.DigestInputStream;
import java.security.MessageDigest;

public class Main {
    private static final char[] HEX_DIGIT = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',
            'e', 'f' };

    public static void md5sum(File f, char[] cbuf, MessageDigest digest, byte[] bbuf) throws IOException {
        toHexChars(md5sum(f, digest, bbuf), cbuf);
    }

    public static byte[] md5sum(File dst, MessageDigest digest, byte[] buf) throws IOException {
        digest.reset();
        InputStream in = new DigestInputStream(new FileInputStream(dst), digest);
        try {
            while (in.read(buf) != -1)
                ;
        } finally {
            in.close();
        }
        return digest.digest();
    }

    public static char[] toHexChars(byte[] bs) {
        char[] cbuf = new char[bs.length * 2];
        toHexChars(bs, cbuf);
        return cbuf;
    }

    public static void toHexChars(byte[] bs, char[] cbuf) {
        for (int i = 0, j = 0; i < bs.length; i++, j++, j++) {
            cbuf[j] = HEX_DIGIT[(bs[i] >>> 4) & 0xf];
            cbuf[j + 1] = HEX_DIGIT[bs[i] & 0xf];
        }
    }

    public static void toHexChars(byte[] bs, byte[] cbuf, int off) {
        for (int i = 0, j = off; i < bs.length; i++, j++, j++) {
            cbuf[j] = (byte) HEX_DIGIT[(bs[i] >>> 4) & 0xf];
            cbuf[j + 1] = (byte) HEX_DIGIT[bs[i] & 0xf];
        }
    }
}

Related

1. md5sum(byte[] content)
2. md5Sum(byte[] data)
3. md5sum(byte[] input, int length)
4. MD5Sum(byte[] par1Data)
5. md5sum(File f)
6. md5sum(File file)
7. md5sum(File file)
8. md5sum(File library)
9. md5sum(InputStream file)