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CRC32 Hash Missmatch

  • To: mathgroup at smc.vnet.net
  • Subject: [mg131391] CRC32 Hash Missmatch
  • From: roby <roby.nowak at gmail.com>
  • Date: Thu, 18 Jul 2013 02:59:47 -0400 (EDT)
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  • Delivered-to: l-mathgroup@wolfram.com
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Dear Group,

I am trying to calculate a CRC 32 checksum with Mathematica 7, it seems that:

Hash[data, "CRC32"]

gives different values opposed to:

FileHash["datafile", "CRC32"]



In[613]:=
"Hello, World!"//
StringToStream //
FileHash[#, "CRC32"]& // IntegerString[#, 16, 8]&

Out[613]= "ec4ac3d0"



In[615]:= "Hello, World!"//
Hash[#, "CRC32"]& // IntegerString[#, 16, 8]&

Out[615]= "a776c351"


Bug or feature or different generating polynomial ???



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