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Poly1305.php (1586B)

      1 <?php
      2 
      3 if (class_exists('ParagonIE_Sodium_Core32_Poly1305', false)) {
      4     return;
      5 }
      6 
      7 /**
      8  * Class ParagonIE_Sodium_Core32_Poly1305
      9  */
     10 abstract class ParagonIE_Sodium_Core32_Poly1305 extends ParagonIE_Sodium_Core32_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         $state = new ParagonIE_Sodium_Core32_Poly1305_State(
     31             self::substr($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         $state = new ParagonIE_Sodium_Core32_Poly1305_State(
     56             self::substr($key, 0, 32)
     57         );
     58         $calc = $state
     59             ->update($m)
     60             ->finish();
     61         return self::verify_16($calc, $mac);
     62     }
     63 }