function do_crypt & do_decrypt help

mohdshaiful

hello..i new in php i need some help about function do_crypt & do_decrypt i want to write in my file auth_inc.php

function do_crypt & do_decrypt how to write this function...

this sample i get from another web but it not steady.i cannot read it and where to put in line...if anyone can write back please help me....!!

//---------------------------------------------- function do_crypt($Pass) { $Result=""; for ($i=0;$i<strlen($Pass);$i++) { $tmp=ord($Pass[$i]); $tmp=$tmp+$i; $num1=intval($tmp/100); $num2=intval($tmp%100); $num2=intval($num2/10); $num3=intval($tmp%10); $Result=$Result.$num1; $Result=$Result.$num2; $Result=$Result.$num3; } return $Result; }

//----------------------------------------------- function do_decrypt($CodedPass) { $result=""; $i=0; while ($i<strlen($CodedPass)) { $num1=ord($CodedPass[$i++]); if ($i>=strlen($CodedPass)) break; $num2=ord($CodedPass[$i++]); if ($i>=strlen($CodedPass)) break; $num3=ord($CodedPass[$i++]); if ($i>strlen($CodedPass)) break; $num1=$num1-48; $num2=$num2-48; $num3=$num3-48; $num=$num1100+$num210+$num3; $char=chr($num); $result=$result.$char; } $result1=""; for ($i=0;$i<strlen($result);$i++) { $tmp=ord($result[$i]); $tmp=$tmp-$i; $char=chr($tmp); $result1=$result1.$char; } return $result1;

laserlight

From the names, I gather that you are trying to do some kind of encryption. What exactly is this encryption for?

mohdshaiful

it for script....password,actually i found one script without complete,in that script i found they use this $member_password = do_decrypt($dbrow['password']); and $db_password = do_crypt($POST['password']); and $save_pass = do_crypt($POST['password']);
when i try to run that script i got Fatal error: Call to undefined function do_crypt() in ...so i need that do_decrypt and do_crypt function command....but i dun know how to write it correct or not

laserlight

mohdshaiful wrote:
actually i found one script without complete,in that script i found they use this $member_password = do_decrypt($dbrow['password']); and $db_password = do_crypt($POST['password']); and $save_pass = do_crypt($POST['password']);
when i try to run that script i got Fatal error: Call to undefined function do_crypt() in ...

Those functions are probably defined in that script somewhere; they are not native to PHP or any common extension that I know of.

mohdshaiful wrote:
it for script....password (...) so i need that do_decrypt and do_crypt function command....but i dun know how to write it correct or not

Firstly, it is very improbable that you can come up with a cryptosystem, other than perhaps a reinvention of the one time pad, that is going to be any good. Next, this is easily overcome by the use of a library such as [man]mcrypt[/man]. However, even if you do use such a library, if you do not know what you are doing (and you don't, seeing that you blindly copied some script that you found), the encryption may well be useless.

mohdshaiful

laserlight thank you for give that advice...me go to library mcrypt...and see lot info there,i use that function do_crypt & do_decrypt what i write in my post..i put in file called func_inc.php....and what happen? it work 100% without error........hehe now i happy.thanks again u help me a lot...for u info i from malaysia 😉