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

NAME

6       Digest::HMAC - Keyed-Hashing for Message Authentication
7

SYNOPSIS

9        # Functional style
10        use Digest::HMAC qw(hmac hmac_hex);
11        $digest = hmac($data, $key, \&myhash);
12        print hmac_hex($data, $key, \&myhash);
13
14        # OO style
15        use Digest::HMAC;
16        $hmac = Digest::HMAC->new($key, "Digest::MyHash");
17
18        $hmac->add($data);
19        $hmac->addfile(*FILE);
20
21        $digest = $hmac->digest;
22        $digest = $hmac->hexdigest;
23        $digest = $hmac->b64digest;
24

DESCRIPTION

26       HMAC is used for message integrity checks between two parties that
27       share a secret key, and works in combination with some other Digest
28       algorithm, usually MD5 or SHA-1.  The HMAC mechanism is described in
29       RFC 2104.
30
31       HMAC follow the common "Digest::" interface, but the constructor takes
32       the secret key and the name of some other simple "Digest::" as
33       argument.
34

SEE ALSO

36       Digest::HMAC_MD5, Digest::HMAC_SHA1
37
38       RFC 2104
39

AUTHORS

41       Graham Barr <gbarr@ti.com>, Gisle Aas <gisle@aas.no>
42
43
44
45perl v5.12.0                      2010-01-10                   Digest::HMAC(3)