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<title>MD5 And CRC-32 Calculation Utilities For Windows (Similar To Unix |
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"md5sum -b")</title> |
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<p align="center"><b><font size="5">MD5 And CRC-32 Calculation Utilities For Windows (Similar To Unix |
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"<i>md5sum |
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-b</i>")</font></b></p> |
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<hr> |
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One of the most common requests I receive is for a utility to calculate the MD5 |
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message digest of a file on a Windows system. (Unix has a command to do |
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this, <i>md5sum</i>.) Usually the need for such a utility arises in |
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verifying a download (an ISO CD image, for example). |
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<p>Both the graphical and console-mode utilities supplied on this page are also |
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included in the <i>ESRG Tool Set</i> download, but it is far quicker and easier |
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to just grab one or both utilities here.</p> |
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<p>Both utilities were created using Microsoft Visual C++ 6.0, and have no |
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external dependencies (no .DLL dependencies, for example). They should run |
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on any Windows 95 or later system.</p> |
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<p>Both utilities calculate the MD5 message digest only in "binary" |
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mode (i.e. "<i>md5sum -b</i>" in Unix). This is the mode which |
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is used in calculating the MD5 message digest accompanying downloads.</p> |
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<p>The graphical version of the utility presents a graphical interface</p> |
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<p align="center"><img border="0" src="g_util_01.gif" width="533" height="136"></p> |
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<p>and one may then either select files using drag'n'drop or the <i>File</i> |
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manu. The utility will then calculate the MD5 message digest and CRC-32 of |
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the file(s) selected. The results may be copied and pasted for printing, |
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archiving, or other purposes. </p> |
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<p align="center"><img border="0" src="g_util_02.gif" width="533" height="136"></p> |
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<p>The console mode version of the utility, which is named md5.exe, operates |
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similarly, except it only calculates the MD5 (no CRC-32), and it will only |
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process one file at a time. There is also a separate CRC-32 utility |
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available.</p> |
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<p align="center"><img border="0" src="g_util_03.gif" width="620" height="131"></p> |
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<p>These standalone utilities can be downloaded from the links in the table |
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below.</p> |
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<table border="2" width="100%"> |
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<tr> |
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<td width="21%"><b>Download Link</b></td> |
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<td width="35%"><b>Description</b></td> |
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<td width="44%"><b>File Size And MD5</b></td> |
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</tr> |
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<tr> |
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<td width="21%"><a href="gfsw.exe">gfsw.exe</a></td> |
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<td width="35%">Windows graphical MD5 and CRC-32 utility.</td> |
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<td width="44%">Size:<br> |
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<font face="Courier" size="2">65,536</font><br> |
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MD-5<br> |
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<font face="Courier" size="2">0c726ad4d87684a58d765540547b1f45</font></td> |
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</tr> |
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<tr> |
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<td width="21%"><a href="md5.exe">md5.exe</a></td> |
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<td width="35%">Windows console-mode MD5 utility.</td> |
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<td width="44%">Size:<br> |
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<font face="Courier" size="2">53,248</font><br> |
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MD-5:<br> |
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<font face="Courier" size="2">b6ced14d5488702906a3323b79aa42df</font></td> |
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</tr> |
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<tr> |
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<td width="21%"><a href="crc32.exe">crc32.exe</a></td> |
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<td width="35%">Windows console-mode CRC-32 utility.</td> |
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<td width="44%">Size:<br> |
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<font face="Courier" size="2">49,152</font><br> |
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MD-5:<br> |
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<font face="Courier" size="2">c9e98639ad3a3ade45cf21234fb6e1e0</font></td> |
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</tr> |
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</table> |
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<p><b><u>Other notes:</u></b></p> |
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<ul> |
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<li>In terms of speed, the utilities seem to be about 95% as fast (i.e. almost |
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identical speed) as the Cygwin <i>md5sum</i> utility.</li> |
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<li>The source code of these utilities is packaged with the <i>ESRG Tool Set</i> |
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source code.</li> |
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<li>The MD5 message digest is covered in <a href="../../docs/rfc1321.txt">RFC |
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1321</a>.</li> |
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</ul> |
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<hr> |
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<p align="center" style="margin-top: -2; margin-bottom: -1"><font size="1">Sound |
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credit: George Carlin, <i>Parental Advisory</i>.<br>This page |
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maintained by <a href="mailto:dtashley@users.sourceforge.net"> David T. Ashley</a>.<br> |
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$Header: /cvsroot/esrg/sfesrg/esrgweba/htdocs/winutils/md5sum/index.html,v 1.2 2003/05/15 15:47:41 dtashley Exp $</font></p> |
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