note 108978 added to function.hash-hmac

Yet another OATH HOTP function. Has a 64 bit counter and is a lot shorter. Enjoy. <?php function oath_hotp ($secret, $ctr, $len=6) { $binctr = pack ('NNC*', $ctr>>32, $ctr & 0xFFFFFFFF); $hash = hash_hmac ("sha1", $binctr, $secret); // This is where hashing stops and truncation begins $ofs = 2*hexdec (substr ($hash, 39, 1)); $int = hexdec (substr ($hash, $ofs, 8)) & 0x7FFFFFFF; $pin = substr ($int, -$len); $pin = str_pad ($pin, $len, "0", STR_PAD_LEFT); return $pin; } ?> ---- Server IP: 113.20.13.217 Probable Submitter: 66.135.40.242 ---- Manual Page -- http://www.php.net/manual/en/function.hash-hmac.php Edit -- https://master.php.net/note/edit/108978 Del: integrated -- https://master.php.net/note/delete/108978/integrated Del: useless -- https://master.php.net/note/delete/108978/useless Del: bad code -- https://master.php.net/note/delete/108978/bad+code Del: spam -- https://master.php.net/note/delete/108978/spam Del: non-english -- https://master.php.net/note/delete/108978/non-english Del: in docs -- https://master.php.net/note/delete/108978/in+docs Del: other reasons-- https://master.php.net/note/delete/108978 Reject -- https://master.php.net/note/reject/108978 Search -- https://master.php.net/manage/user-notes.php