Crypt::Mac::HMAC(3)

NAME
Crypt::Mac::HMAC - Message authentication code HMAC

SYNOPSIS
   ### Functional interface:
   use Crypt::Mac::HMAC qw( hmac hmac_hex );

   # calculate MAC from string/buffer
   $hmac_raw  = hmac('SHA256', $key, 'data buffer');
   $hmac_hex  = hmac_hex('SHA256', $key, 'data buffer');
   $hmac_b64  = hmac_b64('SHA256', $key, 'data buffer');
   $hmac_b64u = hmac_b64u('SHA256', $key, 'data buffer');

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

   $d = Crypt::Mac::HMAC->new('SHA256', $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 HMAC message authentication code (MAC) algorithm.

EXPORT
Nothing is exported by default.

You can export selected functions:

  use Crypt::Mac::HMAC qw(hmac hmac_hex );

Or all of them at once:

  use Crypt::Mac::HMAC ':all';

FUNCTIONS

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

 $hmac_raw = hmac($hash_name, $key, 'data buffer');
 #or
 $hmac_raw = hmac($hash_name, $key, 'any data', 'more data', 'even more data');

 # $hash_name ... any <NAME> for which there exists Crypt::Digest::<NAME>
 # $key ......... the key (octets/bytes)

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

 $hmac_hex = hmac_hex($hash_name, $key, 'data buffer');
 #or
 $hmac_hex = hmac_hex($hash_name, $key, 'any data', 'more data', 'even more data');

 # $hash_name ... any <NAME> for which there exists Crypt::Digest::<NAME>
 # $key ......... the key (octets/bytes, not hex!)

  hmac_b64
Logically joins all arguments into a single string, and returns its HMAC message authentication code encoded as a Base64 string.

 $hmac_b64 = hmac_b64($hash_name, $key, 'data buffer');
 #or
 $hmac_b64 = hmac_b64($hash_name, $key, 'any data', 'more data', 'even more data');

 # $hash_name ... any <NAME> for which there exists Crypt::Digest::<NAME>
 # $key ......... the key (octets/bytes, not Base64!)

  hmac_b64u
Logically joins all arguments into a single string, and returns its HMAC message authentication code encoded as a Base64 URL Safe string (see RFC 4648 section 5).

 $hmac_b64url = hmac_b64u($hash_name, $key, 'data buffer');
 #or
 $hmac_b64url = hmac_b64u($hash_name, $key, 'any data', 'more data', 'even more data');

 # $hash_name ... any <NAME> for which there exists Crypt::Digest::<NAME>
 # $key ......... the key (octets/bytes, not Base64url!)

METHODS

  new
 $d = Crypt::Mac::HMAC->new($hash_name, $key);

 # $hash_name ... any <NAME> for which there exists Crypt::Digest::<NAME>
 # $key ......... the key (octets/bytes)

  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/Hmac>

•   <https://tools.ietf.org/html/rfc2104>