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

NAME  SYNOPSIS  DESCRIPTION  EXPORT  FUNCTIONS  omac  omac_hex  omac_b64  omac_b64u  METHODS  new  clone  reset  add  addfile  mac  hexmac  b64mac  b64umac  SEE ALSO 

---

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();

SEE ALSO

	•		CryptX
	•		<https://en.wikipedia.org/wiki/OMAC_%28cryptography%29>

---