NAME

Crypt::Mac::OMAC - Message authentication code OMAC

SYNOPSIS

### Functional interface:
use Crypt::Mac::OMAC qw( omac omac_hex );
# calculate MAC from string/buffer
$omac_raw  = omac($cipher_name, $key, 'data buffer');
$omac_hex  = omac_hex($cipher_name, $key, 'data buffer');
$omac_b64  = omac_b64($cipher_name, $key, 'data buffer');
$omac_b64u = omac_b64u($cipher_name, $key, 'data buffer');
### OO interface:
use Crypt::Mac::OMAC;
$d = Crypt::Mac::OMAC->new($cipher_name, $key);
$d->add('any data');
$d->addfile('filename.dat');
$d->addfile(*FILEHANDLE);
$result_raw  = $d->mac;     # raw bytes
$result_hex  = $d->hexmac;  # hexadecimal form
$result_b64  = $d->b64mac;  # Base64 form
$result_b64u = $d->b64umac; # Base64 URL Safe form

DESCRIPTION

Provides an interface to the OMAC message authentication code (MAC) algorithm.

EXPORT

Nothing is exported by default.

You can export selected functions:

use Crypt::Mac::OMAC qw(omac omac_hex );

Or all of them at once:

use Crypt::Mac::OMAC ':all';

FUNCTIONS

omac

Logically joins all arguments into a single string, and returns its OMAC message authentication code encoded as a binary string.

$omac_raw = omac($cipher_name, $key, 'data buffer');
#or
$omac_raw = omac($cipher_name, $key, 'any data', 'more data', 'even more data');

omac_hex

Logically joins all arguments into a single string, and returns its OMAC message authentication code encoded as a hexadecimal string.

$omac_hex = omac_hex($cipher_name, $key, 'data buffer');
#or
$omac_hex = omac_hex($cipher_name, $key, 'any data', 'more data', 'even more data');

omac_b64

Logically joins all arguments into a single string, and returns its OMAC message authentication code encoded as a Base64 string.

$omac_b64 = omac_b64($cipher_name, $key, 'data buffer');
#or
$omac_b64 = omac_b64($cipher_name, $key, 'any data', 'more data', 'even more data');

omac_b64u

Logically joins all arguments into a single string, and returns its OMAC message authentication code encoded as a Base64 URL Safe string (see RFC 4648 section 5).

$omac_b64url = omac_b64u($cipher_name, $key, 'data buffer');
#or
$omac_b64url = omac_b64u($cipher_name, $key, 'any data', 'more data', 'even more data');

METHODS

new

$d = Crypt::Mac::OMAC->new($cipher_name, $key);

clone

$d->clone();

reset

$d->reset();

add

$d->add('any data');
#or
$d->add('any data', 'more data', 'even more data');

addfile

$d->addfile('filename.dat');
#or
$d->addfile(*FILEHANDLE);

mac

$result_raw = $d->mac();

hexmac

$result_hex = $d->hexmac();

b64mac

$result_b64 = $d->b64mac();

b64umac

$result_b64url = $d->b64umac();