note 39492 added to function.sha1

Looking for a simple function to implement HMAC-SHA1 but don't want to use the entire PEAR Message lib? //Calculate HMAC-SHA1 according to RFC2104 // http://www.ietf.org/rfc/rfc2104.txt function hmacsha1($key,$data) { $blocksize=64; $hashfunc='sha1'; if (strlen($key)>$blocksize) $key=pack('H*', $hashfunc($key)); $key=str_pad($key,$blocksize,chr(0x00)); $ipad=str_repeat(chr(0x36),$blocksize); $opad=str_repeat(chr(0x5c),$blocksize); $hmac = pack( 'H*',$hashfunc( ($key^$opad).pack( 'H*',$hashfunc( ($key^$ipad).$data ) ) ) ); return bin2hex($hmac); } It is very useful for client-authentication. see also http://cookies.lcs.mit.edu/pubs/webauth:tr.pdf Optionally you can change $hashfunc to 'md5' to make this an HMAC-MD5 function ;-) If you want raw or base64 output instead of hexadecimal, just change the last return line. Cheers, Mark p.s. the "$hmac =" line used to be 1 line but I had to cut it up in order to fit it here ;) ---- Manual Page -- http://www.php.net/manual/en/function.sha1.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+39492 Delete -- http://master.php.net/manage/user-notes.php?action=delete+39492&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+39492&report=yes Search -- http://master.php.net/manage/user-notes.php