CRC RevEng, an arbitrary-precision CRC calculator and algorithm finder

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About CRC RevEng

CRC RevEng is a portable, arbitrary-precision CRC calculator and algorithm finder. It calculates CRCs using any of the 64 preset algorithms, or a user-specified algorithm to any width. It calculates reversed CRCs to give the bit pattern that produces a desired forward CRC. CRC RevEng also reverse-engineers any CRC algorithm from sufficient correctly formatted message-CRC pairs and optional known parameters. It comprises powerful input interpretation options. Compliant with Ross Williams' Rocksoft™ model of parametrised CRC algorithms.

CRC RevEng was first released on 5 January 2011 at regregex.bbcmicro.net. It is a port and expansion of a Perl script, crcbfs.pl, released in 2007. This SourceForge project was created on 28 May 2012.

CRC RevEng is released under the terms of the GNU General Public Licence, version 3 (GPLv3).

Features

Reverse-engineers CRC algorithms
Arbitrary precision, calculates and solves CRCs of any bit width
Bit oriented, accepts messages of any bit length
Handles binary, octal and hex input strings, 7-bit and 8-bit files
Calculates CRCs forwards or backwards, to help produce a desired CRC value
Define your own algorithm, or use one of 64 traceable presets
Written in portable C, adapts to most architectures

Latest version

The latest version of CRC RevEng is 1.1.1, released on 22 April 2013. The latest changes are:

Polynomials in progress messages are printed in the correct format for -p and -q.

Documentation

User manual
Revision history
Catalogue of parametrised CRC algorithms, a list of sources for the preset algorithms in CRC RevEng.

Greg Cook,

http://reveng.sourceforge.net/ Last updated 22 April 2013

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