• NAME
• SYNOPSIS
• DESCRIPTION
• SEE ALSO
• AUTHOR
• COPYRIGHT

NAME

Digest::CRC - Generic CRC functions

SYNOPSIS

  # Functional style

  use Digest::CRC qw(crc64 crc32 crc16 crcccitt crc crc8 crcopenpgparmor);
  $crc = crc64("123456789");
  $crc = crc32("123456789");
  $crc = crc16("123456789");
  $crc = crcccitt("123456789");
  $crc = crc8("123456789");
  $crc = crcopenpgparmor("123456789");

  $crc = crc($input,$width,$init,$xorout,$refout,$poly,$refin,$cont);


  # add data to existing

  $crc = crc32("ABCD", $crc);


  # OO style
  use Digest::CRC;

  $ctx = Digest::CRC->new(type=>"crc16");
  $ctx = Digest::CRC->new(width=>16, init=>0x2345, xorout=>0x0000, 
                          refout=>1, poly=>0x8005, refin=>1, cont=>1);

  $ctx->add($data);
  $ctx->addfile(*FILE);

  $digest = $ctx->digest;
  $digest = $ctx->hexdigest;
  $digest = $ctx->b64digest;

DESCRIPTION

The Digest::CRC module calculates CRC sums of all sorts. It contains wrapper functions with the correct parameters for CRC-CCITT, CRC-16, CRC-32 and CRC-64, as well as the CRC used in OpenPGP's ASCII-armored checksum.

SEE ALSO

https://tools.ietf.org/html/rfc4880#section-6

AUTHOR

Oliver Maul, oli@42.nu

COPYRIGHT

CRC algorithm code taken from "A PAINLESS GUIDE TO CRC ERROR DETECTION ALGORITHMS".

The author of this package disclaims all copyrights and releases it into the public domain.

                    cpanm Digest::CRC

                    perl -MCPAN -e shell
                    install Digest::CRC