NAME
Digest::CRC - Generic CRC functions
SYNOPSIS
# Functional style
$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.