/includes/adodb_lite/session/adodb-encrypt-md5.php

<?php



/*

V4.65 22 July 2005  (c) 2000-2005 John Lim (jlim@natsoft.com.my). All rights reserved.

         Contributed by Ross Smith (adodb@netebb.com). 

  Released under both BSD license and Lesser GPL library license.

  Whenever there is any discrepancy between the two licenses,

  the BSD license will take precedence.

	  Set tabs to 4 for best viewing.



*/



// security - hide paths

if (!defined('ADODB_SESSION')) die();



//	 Session Encryption by Ari Kuorikoski <ari.kuorikoski@finebyte.com>

class MD5Crypt{

		function keyED($txt,$encrypt_key)

		{

				$encrypt_key = md5($encrypt_key);

				$ctr=0;

				$tmp = "";

				for ($i=0;$i<strlen($txt);$i++){

						if ($ctr==strlen($encrypt_key)) $ctr=0;

						$tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1);

						$ctr++;

				}

				return $tmp;

		}



		function Encrypt($txt,$key)

		{

				srand((double)microtime()*1000000);

				$encrypt_key = md5(rand(0,32000));

				$ctr=0;

				$tmp = "";

				for ($i=0;$i<strlen($txt);$i++)

				{

				if ($ctr==strlen($encrypt_key)) $ctr=0;

				$tmp.= substr($encrypt_key,$ctr,1) .

				(substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1));

				$ctr++;

				}

				return base64_encode($this->keyED($tmp,$key));

		}



		function Decrypt($txt,$key)

		{

				$txt = $this->keyED(base64_decode($txt),$key);

				$tmp = "";

				for ($i=0;$i<strlen($txt);$i++){

						$md5 = substr($txt,$i,1);

						$i++;

						$tmp.= (substr($txt,$i,1) ^ $md5);

				}

				return $tmp;

		}



		function RandPass()

		{

				$randomPassword = "";

				srand((double)microtime()*1000000);

				for($i=0;$i<8;$i++)

				{

						$randnumber = rand(48,120);



						while (($randnumber >= 58 && $randnumber <= 64) || ($randnumber >= 91 && $randnumber <= 96))

						{

								$randnumber = rand(48,120);

						}



						$randomPassword .= chr($randnumber);

				}

				return $randomPassword;

		}



}



/**

 */

class ADODB_Encrypt_MD5 {

	/**

	 */

	function write($data, $key) {

		$md5crypt =& new MD5Crypt();

		return $md5crypt->encrypt($data, $key);

	}



	/**

	 */

	function read($data, $key) {

		$md5crypt =& new MD5Crypt();

		return $md5crypt->decrypt($data, $key);

	}



}



return 1;



?>