Encrypting a javascript variable

[pavanponnapalli]

hi,
I have entered a value in a text box , i have called a javascript function.
There i have written as under:
[ var old=document.frm.old.value;
old1=crypt([old,key]);
alert(old1); ]

I am not getting any error message in the javascript , neither i am getting the alert message.
if i remove the crypt function line and display alert message as alert(old),
then i am hetting the value of the textbox in that variable. So, i think there is something wrong in my crypt function. So, Could anyone tell me the correct syntax for a crypt function that works perfectly?

Thanks & Regards,
pavan .

[acoder]

Show your crypt function. Note that encrypting something using JavaScript for the purposes of hiding is not foolproof by any means and can be decrypted, sometimes quite easily.

[pavanponnapalli]

hi ,
My entire javascript function is as under .

  function call(frm)
       {
                var old=document.frm.old.value;
                    old1=crypt([old,key]);
                    alert(old1);
                var new1=document.frm.new1.value;
                var new2=document.frm.new2.value;
 
                if(old=="" || new1=="" || new2=="")
                {
            alert("Enter values");
                        return;
        }
                else 
                {
              if(old!="$old_password")
                      {
                           alert("You have entered wrong old password!!! Try Again");
                           return;
                      }
                      else
                      {
                if(new1==new2)
                            {   
                 var url="http://10.202.1.24/shiftscheduler/master?session=$session_id&USERID=$UID&pass=1";
                                 document.frm.action=url;
                                 document.frm.submit();
                }
                             else
                             {
                 alert("The two new passwords you have entered do not match!!! Enter again!!!");
                                 return;
                 }
              }
 
                }
       }

In the above code $old_password is the already existing password in the database. $old_password is a perl variable. old_password is already encrypted in the database for security reasons. I have caught that encrypted value in the perl variable $old_password, but there is no decrypt function in perl.
So, i want to encrypt the javascript variable old. In the above code the javascript encrypt function crypt() is not working. So, please tell me a way to encrypt my javascript variable.

Thanks & Regards,
pavan

[acoder]

You will have to use the same encryption algorithm used for encrypting the password in Perl. I suggest that you make this check in Perl rather than JavaScript. You can make an Ajax request if you want to avoid page reload.