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MathGroup Archive 2005

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Re: MD5 Brain teaser

  • To: mathgroup at smc.vnet.net
  • Subject: [mg55489] Re: [mg55484] MD5 Brain teaser
  • From: Christopher Purcell <christopherpurcell at mac.com>
  • Date: Sat, 26 Mar 2005 02:39:20 -0500 (EST)
  • References: <200503251048.FAA11370@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

If you are using Mac OSX, or some other Unix /Linux system, MD5 is 
likely already on your system. On Mac OSX you can do this:

a = "your text message goes here";
Export["junk.txt", a, "Text"];
Run["md5 junk.txt >junk.md5"];
Import["junk.md5", "List"] [[4]]

8328cde7b79faeb0ca1b5b155e60168b


This runs very fast, on huge files, and re- coding MD5 in Mathematica 
would not improve on its speed.

Christopher Purcell
Sensors & Actuators Group
DRDC-Atlantic, 9 Grove St., PO Box 1012,
Dartmouth NS B2Y 3Z7 Canada
Work E-mail chris.purcell at drdc-rddc.gc.ca
Work Tel 902-426-3100 x389 Fax 902-426-9654
Home Tel 902-464-9248
Home E-mail christopherpurcell at mac.com
AIM/iChatAV:   cffrc

On Mar 25, 2005, at 6:48 AM, Barthelet, Luc wrote:

>
> I can't find a Mathematica implementation of MD5 checksum anywhere.
> There is one email question in mathgroup in 1998 but no answer.
>
> Anyone feel like implementing it? I could use it.
>
> I found this algorithm description that includes a validation of the
> implementation.
> http://www.columbia.edu/~ariel/ssleay/rfc1321.html
>
> Thanks in advance,
>
> Luc
>


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