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.

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.

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