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From Alexander Gräf (JIRA) <>
Subject [jira] Created: (CODEC-87) DigestUtils: MD5 checksum is not calculated correctly on linux64-platforms
Date Fri, 11 Sep 2009 12:38:57 GMT
DigestUtils: MD5 checksum is not calculated correctly on linux64-platforms

                 Key: CODEC-87
             Project: Commons Codec
          Issue Type: Bug
    Affects Versions: 1.4, 1.3
         Environment: Suse Enterprise Linux 10 (64bit)
            Reporter: Alexander Gräf

Actual behaviour: 

The class DigesterUtils calculates different md5-hashes depending on plattform.

I used jdk1.5.0_19-32bit on win32 and jdk1.5.0_19-64bit on SLES 10 (64-bit) for testing. 

The effect depends on the charactersequence that is used for the calculation of the hash.
There are some charactersequences that are calculated correctly. I think that the hash that
is calculated on Windows 32 is the correct one since we have checked it by using an other
library for calculating md5-hashes (Tagish-Auth-1.0.3). Since both of the tested libraries
internally make use of the class but differ in the way the calculated
byte[] is transformed in a hex-string, I think that the problem is located in the Hex.encodeHex(byte[]
hashedBytes) method.

Expected behaviour: 
The md5-hash should should not depend on the platform and should be equal for all platforms.



produces the hash 79c28faa4fec5ceb98137f548f1d6fe3 on Windows XP (32bit).

The same instruction produces 3191078c1fa327f9856b5b54628f2a39 on Suse Enterprise Linux 10

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