Encrypt/Decrypt query string

[SCook]

Hi all,

 

I would like to encrypt a query string, then decrypt it later.  What is the quickest way to do this?  A quick example coding would be very helpful.

[cooldude832]

http://us.php.net/manual/en/ref.mcrypt.php

[JasonLewis]

also have a gander a base64.

 

http://au.php.net/manual/en/function.base64-encode.php

http://au.php.net/manual/en/function.base64-decode.php

 

its probably not very good for query strings though.

[SCook]

That helps, and I've looked into mcrypt, but I was hoping for an actual example code I could look at.  Sometimes the manual is a little vague.  Can anyone paste some quick code to show me the proceedure?  Thanks.

[per1os]

kooktroop at gmail dot com

09-Jul-2004 06:13

Following on from the mcrypt_encrypt() example:

 

<?php
$text = "boggles the inivisble monkey will rule the world";
$key = "This is a very secret key";

$iv_size = mcrypt_get_iv_size(MCRYPT_XTEA, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
echo strlen($text) . "<br>";

$enc = mcrypt_encrypt(MCRYPT_XTEA, $key, $text, MCRYPT_MODE_ECB, $iv);
echo strlen($enc) . "<br>";
  
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$key = "This is a very secret key";
$text = "Meet me at 11 o'clock behind the monument.";
echo strlen($text) . "<br>";

$crypttext = mcrypt_decrypt(MCRYPT_XTEA, $key, $enc, MCRYPT_MODE_ECB, $iv);
echo "$crypttext<br>";
?>

 

Found at http://us.php.net/manual/en/function.mcrypt-decrypt.php#43938

[SCook]

Okay, cool.  And to descrypt, I just need to use mcrypt_descrypt and ente rthe same values as I used to encrypt, right?