{nule.org}

About JMd5Sum

I’m used to living in a Unix world which is one where when I want to know the MD5 sum for a downloaded file I can just type “md5sum filename” and it tells me the digest bytes. That’s useful for making sure your download wasn’t corrupted in some way. Because of my laptop I need to live in a windows world sometimes and not having easy access to an md5sum command line utility prompted me to make a GUI one that would work in Linux, OSX and Windows.

By the way, it also does SHA1 sums, as that’s becoming the favorite after some recently discovered vulnerabilities with MD5.

Previously I had a blurb right here about how the program was slightly slow compared to other implementations. Still true, but now it’s much, much faster. Probably half as fast as a pure C implementation, so it’ll do a 100 mb file in a few seconds, not a minute or more like before (on relatively modern machines).

License

This software is distributed under the terms of Apache License version 2.0. This code includes software that is part of the Jakarta Commons project (namely the hex encoder).

Install

You’ll need Java 2 version 1.5 available to run this software. With that installed, download the newest jar file below and save it someplace useful (like My Documents or your home directory). To run it just double-click it in windows. On other platforms or from the command line just run java -jar jmd5sum.jar.

With this piece of software I’m changing my distribution steps. Instead of distributing a single jar file I’m distributing a zip or tgz file with all the software and libraries inside. That way I’m not doing anything questionable by including unjarred libraries inside of my jar. The software should still work with the instructions above.

Downloads

• Please use the webstart version to install the software – the zip is provided as a convenience for power users.
• JMd5Sum 0.5 (final) Zip Archive
• JMd5Sum 0.5 (final) TGZ Archive
• SVN repository: https://www.thot.us/svn/nule.org_JMd5Sum/trunk/
• JMd5Sum 0.5 (source) Zip Archive

Webstart

Launch JMd5Sum via webstart!