tempest

[php]
<?php
class encryption {
var $key;

function encryption($key) {
$this->key = $key;
}

function encrypt($str) {
$str = $this->split($str);
$key = $this->split($this->key);

while(current($str)) {
$str[key($str)] = chr(ord(current($str)) + ord(current($key)));
next($str);

if(!next($key))
reset($key);
}

return implode("", $str);
}

function decrypt($str) {
$str = $this->split($str);
$key = $this->split($this->key);

while(current($str)) {
$str[key($str)] = chr(ord(current($str)) - ord(current($key)));
next($str);

if(!next($key))
reset($key);
}

return implode("", $str);
}

function split($str) {
$str = array($str);

while(strlen($str[count($str)-1]) != 1) {
$str[count($str)] = substr($str[count($str)-1], 1, strlen($str[count($str)-1])-1);
$str[count($str)-2] = substr($str[count($str)-2], 0, 1);
}

return $str;
}
}

$blah = new encryption("i like cheese");
$test = array();

$test[0] = $blah->encrypt("This is a test message...");
$test[1] = $blah->decrypt($test[0]);

printf("Encrypted: %s\n" .
"Decrypted: %s\n",
$test[0], $test[1]);
?>
[/php]

I spent a few minutes writing an encryption example in PHP presumably for web programmers who want an easier to use way to be able to store data in a database securely and retrieve it later.

I don't have time to comment the code, but if anybody has any questions i'll answer them in this thread. I tried posting in tutorials, but for some reason it seems that my account doesn't have the priveledges.

__________________

DaWei

I've heard the mods have to move it there, Tempest. I don't know that for a fact.

__________________
Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code.
Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Infinite Recursion

Yep, I think thats a mod thing. Thanks for the code

__________________
http://jasonpowers.net

"There are a thousand hacking at the branches of evil to one who is striking at the root."