1 <?php

     2 

     3 if (class_exists('ParagonIE_Sodium_Core_Poly1305', false)) {

     4     return;

     5 }

     6 

     7 /**

     8  * Class ParagonIE_Sodium_Core_Poly1305

     9  */

    10 abstract class ParagonIE_Sodium_Core_Poly1305 extends ParagonIE_Sodium_Core_Util

    11 {

    12     const BLOCK_SIZE = 16;

    13 

    14     /**

    15      * @internal You should not use this directly from another application

    16      *

    17      * @param string $m

    18      * @param string $key

    19      * @return string

    20      * @throws SodiumException

    21      * @throws TypeError

    22      */

    23     public static function onetimeauth($m, $key)

    24     {

    25         if (self::strlen($key) < 32) {

    26             throw new InvalidArgumentException(

    27                 'Key must be 32 bytes long.'

    28             );

    29         }

    30         $state = new ParagonIE_Sodium_Core_Poly1305_State(

    31             self::substr($key, 0, 32)

    32         );

    33         return $state

    34             ->update($m)

    35             ->finish();

    36     }

    37 

    38     /**

    39      * @internal You should not use this directly from another application

    40      *

    41      * @param string $mac

    42      * @param string $m

    43      * @param string $key

    44      * @return bool

    45      * @throws SodiumException

    46      * @throws TypeError

    47      */

    48     public static function onetimeauth_verify($mac, $m, $key)

    49     {

    50         if (self::strlen($key) < 32) {

    51             throw new InvalidArgumentException(

    52                 'Key must be 32 bytes long.'

    53             );

    54         }

    55         $state = new ParagonIE_Sodium_Core_Poly1305_State(

    56             self::substr($key, 0, 32)

    57         );

    58         $calc = $state

    59             ->update($m)

    60             ->finish();

    61         return self::verify_16($calc, $mac);

    62     }

    63 }