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  • ZeroBin Security Audit
    Nice "equal" function taking constant time to compute. This avoids time attacks, based on the assumption that different things and equal things take different time to compare.

         function slow_equals($a, $b)
         {
             $diff = strlen($a) ^ strlen($b);
             for($i = 0; $i < strlen($a) && $i < strlen($b); $i++)
             {
                 $diff |= ord($a[$i]) ^ ord($b[$i]);
             }
             return $diff === 0;
         }
    Mon 03 Feb 2014 10:45:01 AM CET - permalink -
    QRCode
    - https://defuse.ca/audits/zerobin.htm
    en hack secu
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