NAME

       Crypt::Mac::BLAKE2b - Message authentication code BLAKE2b MAC (RFC 7693)

SYNOPSIS

          ### Functional interface:
          use Crypt::Mac::BLAKE2b qw( blake2b blake2b_hex );

          # calculate MAC from string/buffer
          $blake2b_raw  = blake2b($size, $key, 'data buffer');
          $blake2b_hex  = blake2b_hex($size, $key, 'data buffer');
          $blake2b_b64  = blake2b_b64($size, $key, 'data buffer');
          $blake2b_b64u = blake2b_b64u($size, $key, 'data buffer');

          ### OO interface:
          use Crypt::Mac::BLAKE2b;

          $d = Crypt::Mac::BLAKE2b->new($size, $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 BLAKE2b message authentication code (MAC) algorithm.

EXPORT

       Nothing is exported by default.

       You can export selected functions:

         use Crypt::Mac::BLAKE2b qw(blake2b blake2b_hex );

       Or all of them at once:

         use Crypt::Mac::BLAKE2b ':all';

FUNCTIONS

   blake2b
       Logically joins all arguments into a single string, and returns its BLAKE2b message
       authentication code encoded as a binary string.

        $blake2b_raw = blake2b($size, $key, 'data buffer');
        #or
        $blake2b_raw = blake2b($size, $key, 'any data', 'more data', 'even more data');

   blake2b_hex
       Logically joins all arguments into a single string, and returns its BLAKE2b message
       authentication code encoded as a hexadecimal string.

        $blake2b_hex = blake2b_hex($size, $key, 'data buffer');
        #or
        $blake2b_hex = blake2b_hex($size, $key, 'any data', 'more data', 'even more data');

   blake2b_b64
       Logically joins all arguments into a single string, and returns its BLAKE2b message
       authentication code encoded as a Base64 string.

        $blake2b_b64 = blake2b_b64($size, $key, 'data buffer');
        #or
        $blake2b_b64 = blake2b_b64($size, $key, 'any data', 'more data', 'even more data');

   blake2b_b64u
       Logically joins all arguments into a single string, and returns its BLAKE2b message
       authentication code encoded as a Base64 URL Safe string (see RFC 4648 section 5).

        $blake2b_b64url = blake2b_b64u($size, $key, 'data buffer');
        #or
        $blake2b_b64url = blake2b_b64u($size, $key, 'any data', 'more data', 'even more data');

METHODS

   new
        $d = Crypt::Mac::BLAKE2b->new($size, $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://tools.ietf.org/html/rfc7693>