---
name: "Digest::CRC"
section: "3pm"
platform: "linux"
package: "libdigest-crc-perl"
version: "0.24-1+b4"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Digest::CRC"
---

# Digest::CRC(3pm)

Generic CRC functions

## 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.