Updated: January 2025
Current command:
reveng --help
Usage: reveng -cdDesvhu? [-bBfFGlLMrStVXyz] [-a BITS] [-A OBITS] [-i INIT] [-k KPOLY] [-m MODEL] [-p POLY] [-p POLY] [-P RPOLY] [-q QPOLY] [-w WIDTH] [-x XOROUT] [STRING...] Options: -a BITS bits per character (1 to 64) -A OBITS bits per output character (1 to 64) -i INIT initial register value -k KPOLY generator in Koopman notation (implies WIDTH) -m MODEL preset CRC algorithm -p POLY generator or search range start polynomial -P RPOLY reversed generator polynomial (implies WIDTH) -q QPOLY search range end polynomial -w WIDTH register size, in bits -x XOROUT final register XOR value Modifier switches: -b big-endian CRC -B big-endian CRC output -f read files named in STRINGs -F skip preset model check pass -G skip brute force search pass -l little-endian CRC -L little-endian CRC output -M non-augmenting algorithm -r right-justified output -S print spaces between characters -t left-justified output -V reverse algorithm only -X print uppercase hexadecimal -y low bytes first in files -z raw binary STRINGs Mode switches: -c calculate CRCs -d dump algorithm parameters -D list preset algorithms -e echo (and reformat) input -s search for algorithm -v calculate reversed CRCs -g search for alg given hex+crc -h | -u | -? show this help Common Use Examples: reveng -g 01020304e3 Searches for a known/common crc preset that computes the crc on the end of the given hex string reveng -w 8 -s 01020304e3 010204039d Searches for any possible 8 bit width crc calc that computes the crc on the end of the given hex string(s) reveng -m CRC-8 -c 01020304 Calculates the crc-8 of the given hex string reveng -D Outputs a list of all known/common crc models with their preset values Copyright (C) 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Gregory Cook This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Version 1.6.2 <http://reveng.sourceforge.net/>