1Digest::CRC(3)        User Contributed Perl Documentation       Digest::CRC(3)
2
3
4

NAME

6       Digest::CRC - Generic CRC functions
7

SYNOPSIS

9         # Functional style
10
11         use Digest::CRC qw(crc64 crc32 crc16 crcccitt crc crc8 crcopenpgparmor);
12         $crc = crc64("123456789");
13         $crc = crc32("123456789");
14         $crc = crc16("123456789");
15         $crc = crcccitt("123456789");
16         $crc = crc8("123456789");
17         $crc = crcopenpgparmor("123456789");
18
19         $crc = crc($input,$width,$init,$xorout,$refout,$poly,$refin,$cont);
20
21
22         # add data to existing
23
24         $crc = crc32("ABCD", $crc);
25
26
27         # OO style
28         use Digest::CRC;
29
30         $ctx = Digest::CRC->new(type=>"crc16");
31         $ctx = Digest::CRC->new(width=>16, init=>0x2345, xorout=>0x0000,
32                                 refout=>1, poly=>0x8005, refin=>1, cont=>1);
33
34         $ctx->add($data);
35         $ctx->addfile(*FILE);
36
37         $digest = $ctx->digest;
38         $digest = $ctx->hexdigest;
39         $digest = $ctx->b64digest;
40

DESCRIPTION

42       The Digest::CRC module calculates CRC sums of all sorts.  It contains
43       wrapper functions with the correct parameters for CRC-CCITT, CRC-16,
44       CRC-32 and CRC-64, as well as the CRC used in OpenPGP's ASCII-armored
45       checksum.
46

SEE ALSO

48       https://tools.ietf.org/html/rfc4880#section-6
49

AUTHOR

51       Oliver Maul, oli@42.nu
52

54       CRC algorithm code taken from "A PAINLESS GUIDE TO CRC ERROR DETECTION
55        ALGORITHMS".
56
57       The author of this package disclaims all copyrights and releases it
58       into the public domain.
59
60
61
62perl v5.34.0                      2021-07-22                    Digest::CRC(3)
Impressum