Although the CRC32 does not have a math high ground as MD5 or PDP, it is a practically good enough solution to keep data integrity.

The most widely used CRC32 is CRC32-CCITT. There are many ways to get the it:

*) The Winzip use CRC32-CCITT to prevent data corruption. In the Menu/Options/Configuration, Click View Tab, check the check box of CRC.

*) If you happen to have installed ActivePerl on your Windows, it comes with a batch file "CRC32.bat", which does the CRC32-CCITT for file

*) However, I did not find a handy one that comes with the Cygwin or Redhat release. A close one is "checksum", which does calculate CRC32, but with a different flavor, "CRC32-POSIX.2". That is different from CRC32-CCITT

The most thorough and handy description of CRC32 I found so far is Ref[1]. In the Brief Case, getCRC32.tar.gz is provided according to Ref[1]. It simply calculates the length and CRC32-CCITT of a given file. It has been tested under Cygwin.

Goto Ref[2] to see how to download.

References:
[1] A Painless Guide to CRC Error Detection Algorithms, Ross N. Williams, Rocksoft^tm Pty Ltd., Aug 1993
[2] HAHAHAHA's Briefcase

Posted by HAx4 at 9:37 PM

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