So is this the best/safest way within reason ?
//----------------------------------
// 'Sending' PHP script:
require_once("/home/includes/encryption.inc");
$str
=encrypt(urlencode("movie=mymovie.mov&mask=mask.gif&drag=drag.gif"));
$urlString = $pathtoReceivingScript.$str ;
//----------------------------------
// 'Receiving' PHP script:
require_once("/home/includes/encryption.inc");
$str =$_SERVER['QUERY_STRING'];
parse_str(urldecode(decrypt($str)),$getVarArray);
$movie = $getVarArray['movie'];
$mask = $getVarArray['mask'];
$drag = $getVarArray['drag'];
//echo "$movie,$mask,$drag";
//----------------------------------
// Encryption.inc
// Encrypt
function encrypt($encrypt) {
$key = "6r9qEJg6";
srand((double) microtime() * 1000000); //for sake of MCRYPT_RAND
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256,
MCRYPT_MODE_ECB), MCRYPT_RAND);
$passcrypt = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $encrypt,
MCRYPT_MODE_ECB, $iv);
$encode = base64_encode($passcrypt);
return $encode;
}
// Decrypt
function decrypt($decrypt) {
global $key;
$key = "6r9qEJg6";
$decoded = base64_decode($decrypt);
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256,
MCRYPT_MODE_ECB), MCRYPT_RAND);
$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $decoded,
MCRYPT_MODE_ECB, $iv);
return $decrypted;
}
On Sep 29, 2005, at 9:33 AM, Jochem Maas wrote:
Graham Anderson wrote:
What is the best way to decrypt a query string back into variables ?
$root = "http://www.myserver.com/script.php";;
$queryString = "?test=mytest&color=red";
myEncrypt($queryString); //add mCrypt encryption
$finalURL = $root.$encryptedQueryString;
what is the proper what to decrypt the GET variables on the other
side ?
Do you need to decrypt the query string first ?
yes - if you have a query string like
4509134534068953534875104584437043134081743
or whatever then php won't turn it into a $_GET var.
although your query string could contain &'s and/or ?'s and/or ='s
in which case you might have cruft in the $_GET array which you would
want to clean out before extracting your decrypted string into
$_GET ..
decrypt($_SERVER['QUERY_STRING']);
Once you have decrypted it, can you pass it along to a $_GET as you
would with an unencrypted query string ?
$test = $_GET['test'];
Or, do you need to parse the string to extract variables?
yes you do, but this being php - there is a function that will do it
for you :-)
http://php.net/parse_str
many thanks
g
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