Crypt::Mac::OMAC - phpMan

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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>