note 38573 deleted from function.str-rot13 by aidan

Note Submitter: pathfinderNO (AT) SPAMeia dot MEpl ---- I've wrote my own function that works very like Rot13 only it uses random number to rotate characters <? /* * Info about spliting function for PHP < 5.0.0 * * split a string up into equal sized chunks * * Paul Gregg <pgregg at NOSPAM pgregg dot com> * 23 September 2003 * http://www.pgregg.com/projects/php/code/str_split.phps * str_split is available from PHP version 5 by default * */ Function str_split($string, $chunksize=1) { preg_match_all('/('.str_repeat('.', $chunksize).')/Uims', $string, $matches); return $matches[1]; } # # # Author: Michal Mazurek <pathfinder at DONT SEND SPAM eia dot pl> # # This code is for public purpose, you can edit, use it only if you will # leave this header # # http://pathfinder.eia.pl # function mycrypt($str){ # creating random key to rotate $key = rand(1, strlen($str)); $charr = str_split($str); foreach($charr as $ch){ #making encrypted string $out .= chr(ord($ch)+$key); } return Array($out, $key); } function unmycrypt($str, $key){ $charr = str_split($str); foreach($charr as $ch){ #making decrypted string $out .= chr(ord($ch)-$key); } return $out; } list($crypted, $key) = mycrypt("My girl dumped me when I said to her PHP"); echo $crypted." (".strlen($crypted).")\n Key:$key \n"; $uncrypted = unmycrypt($crypted, $key); echo "$uncrypted (".strlen($uncrypted).")"; ?> This will produce: 4O{"iktn"fworgf"og"yjgp"K"uckf"vq"jgt"RJR (40) Key:2 My girl dumped me when I said to her PHP (40) It looks that crypted msg is longer than uncrypted, that is because browser can't display special chars and browser is replacing them by numbers, when I checked strings lengths it was all ok. So when you want to copy crypted msg from browser to somewhere else it'll not work. I think it will provide more security. On final this function is not safe enough so I don't provide any guarantee that someone won't brake it.