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Digest::HMAC.3pm

NAME

Digest::HMAC - Keyed-Hashing for Message Authentication

SYNOPSIS

  # Functional style
  use Digest::HMAC qw(hmac hmac_hex);
  $digest = hmac($data, $key, \&myhash);
  print hmac_hex($data, $key, \&myhash);
 
  # OO style
  use Digest::HMAC;
  $hmac = Digest::HMAC->new($key, "Digest::MyHash");
 
  $hmac->add($data);
  $hmac->addfile(*FILE);
 
  $digest = $hmac->digest;
  $digest = $hmac->hexdigest;
  $digest = $hmac->b64digest;
 
 

DESCRIPTION

HMAC is used for message integrity checks between two parties that share a secret key, and works in combination with some other Digest algorithm, usually MD5 or SHA-1. The HMAC mechanism is described in RFC 2104.

HMAC follow the common "Digest::" interface, but the constructor takes the secret key and the name of some other simple "Digest::" as argument.

SEE ALSO

Digest::HMAC_MD5, Digest::HMAC_SHA1

RFC 2104

AUTHORS

Graham Barr <gbarr@ti.com>, Gisle Aas <gisle@aas.no>