Hi Damon,
we use probably a different set of hash values than what is used in
md5sum. I'll check and try to make TMD5 return the same value.
Cheers, Fons.
On Thu, 2004-07-08 at 19:46, Damon Spayde wrote:
> I would like to use the TMD5 ROOT class to calculate MD5 checksums of
> certain files. However, I have found that MD5 checksums calculated with
> TMD5 are not the same as those calculated with other methods, e.g.
> 'md5sum' on Linux machines. Below is the output of a ROOT script
> (attached as file md5test.cxx) that calculates the MD5 checksum of a
> zero-length string with TMD5 and the output from md5sum:
>
> [spayde@uiuc-gzero blinding]$ root -b md5test.cxx
> *******************************************
> * *
> * W E L C O M E to R O O T *
> * *
> * Version 4.00/04 5 June 2004 *
> * *
> * You are welcome to visit our Web site *
> * http://root.cern.ch *
> * *
> *******************************************
>
> Compiled for linux with thread support.
>
> CINT/ROOT C/C++ Interpreter version 5.15.133, Apr 18 2004
> Type ? for help. Commands must be C++ statements.
> Enclose multiple statements between { }.
> root [0]
> Processing md5test.cxx...
> MD5 Check Sum of Zero Length String:
> 227b7f48d21283f63bc9bbc15b44ea1a
> root [1] .!echo -n "" | md5sum
> d41d8cd98f00b204e9800998ecf8427e -
> root [2]
>
> I get similar results (the MD5 sums do not agree between the two
> methods) when using finite length strings or files. I am running ROOT
> version 4.00/04 on a RedHat Enterprise Linux 3 system. Any help would
> be greatly appreciated.
>
> Regards,
> Damon
--
Org: CERN, European Laboratory for Particle Physics.
Mail: 1211 Geneve 23, Switzerland
E-Mail: Fons.Rademakers@cern.ch Phone: +41 22 7679248
WWW: http://www.rademakers.org/fons/ Fax: +41 22 7679480
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