Encryption PHP Script

[rejoice]

Is there any PHP script that can help me to generate a fix length cipher text and decrypt it as well?

By the way, my server does not support any DES, AES, mcrypt...etc that provided by PHP... :-(

 

[DRJ478]

Here's a simple class that works well:

<?php 
/**
* Simple 2-way encryption class
*/
class rc4crypt {

function endecrypt ($pwd, $data, $case='') {
	if ($case == 'de') {
		$data = urldecode($data);
	}
	$key[] = &quot;&quot;;
	$box[] = &quot;&quot;;
	$temp_swap = &quot;&quot;;
	$pwd_length = 0;
	$pwd_length = strlen($pwd);
	for ($i = 0; $i <= 255; $i++) {
		$key[$i] = ord(substr($pwd, ($i % $pwd_length), 1));
		$box[$i] = $i;
	}
	$x = 0;
	for ($i = 0; $i <= 255; $i++) {
		$x = ($x + $box[$i] + $key[$i]) % 256;
		$temp_swap = $box[$i];
		$box[$i] = $box[$x];
		$box[$x] = $temp_swap;
	}
	$temp = &quot;&quot;;
	$k = &quot;&quot;;
	$cipherby = &quot;&quot;;
	$cipher = &quot;&quot;;
	$a = 0;
	$j = 0;
	for ($i = 0; $i < strlen($data); $i++) {
		$a = ($a + 1) % 256;
		$j = ($j + $box[$a]) % 256;
		$temp = $box[$a];
		$box[$a] = $box[$j];
		$box[$j] = $temp;
		$k = $box[(($box[$a] + $box[$j]) % 256)];
		$cipherby = ord(substr($data, $i, 1)) ^ $k;
		$cipher .= chr($cipherby);
	}
	if ($case == 'de') {
		$cipher = urldecode(urlencode($cipher));
	} else {
		$cipher = urlencode($cipher);
	}
	return $cipher;
}
}
?>

You need a pass phrase to en/decrypt.

 

[rejoice]

Thanks