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<?php
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//	 Session Encryption by Ari Kuorikoski <ari.kuorikoski@finebyte.com>
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class MD5Crypt{
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		function keyED($txt,$encrypt_key)
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		{
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				$encrypt_key = md5($encrypt_key);
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				$ctr=0;
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				$tmp = "";
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				for ($i=0;$i<strlen($txt);$i++){
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						if ($ctr==strlen($encrypt_key)) $ctr=0;
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						$tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1);
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						$ctr++;
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				}
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				return $tmp;
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		}
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		function Encrypt($txt,$key)
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		{
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				srand((double)microtime()*1000000);
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				$encrypt_key = md5(rand(0,32000));
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				$ctr=0;
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				$tmp = "";
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				for ($i=0;$i<strlen($txt);$i++)
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				{
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				if ($ctr==strlen($encrypt_key)) $ctr=0;
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				$tmp.= substr($encrypt_key,$ctr,1) .
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				(substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1));
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				$ctr++;
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				}
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				return base64_encode($this->keyED($tmp,$key));
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		}
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		function Decrypt($txt,$key)
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		{
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				$txt = $this->keyED(base64_decode($txt),$key);
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				$tmp = "";
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				for ($i=0;$i<strlen($txt);$i++){
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						$md5 = substr($txt,$i,1);
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						$i++;
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						$tmp.= (substr($txt,$i,1) ^ $md5);
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				}
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				return $tmp;
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		}
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		function RandPass()
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		{
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				$randomPassword = "";
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				srand((double)microtime()*1000000);
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				for($i=0;$i<8;$i++)
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				{
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						$randnumber = rand(48,120);
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						while (($randnumber >= 58 && $randnumber <= 64) || ($randnumber >= 91 && $randnumber <= 96))
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						{
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								$randnumber = rand(48,120);
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						}
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						$randomPassword .= chr($randnumber);
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				}
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				return $randomPassword;
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		}
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}
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class SHA1Crypt{
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		function keyED($txt,$encrypt_key)
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		{
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				$encrypt_key = sha1($encrypt_key);
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				$ctr=0;
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				$tmp = "";
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				for ($i=0;$i<strlen($txt);$i++){
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						if ($ctr==strlen($encrypt_key)) $ctr=0;
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						$tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1);
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						$ctr++;
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				}
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				return $tmp;
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		}
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		function Encrypt($txt,$key)
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		{
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				srand((double)microtime()*1000000);
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				$encrypt_key = sha1(rand(0,32000));
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				$ctr=0;
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				$tmp = "";
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				for ($i=0;$i<strlen($txt);$i++)
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				{
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				if ($ctr==strlen($encrypt_key)) $ctr=0;
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				$tmp.= substr($encrypt_key,$ctr,1) .
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				(substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1));
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				$ctr++;
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				}
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				return base64_encode($this->keyED($tmp,$key));
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		}
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		function Decrypt($txt,$key)
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		{
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				$txt = $this->keyED(base64_decode($txt),$key);
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				$tmp = "";
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				for ($i=0;$i<strlen($txt);$i++){
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						$sha1 = substr($txt,$i,1);
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						$i++;
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						$tmp.= (substr($txt,$i,1) ^ $sha1);
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				}
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				return $tmp;
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		}
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		function RandPass()
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		{
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				$randomPassword = "";
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				srand((double)microtime()*1000000);
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				for($i=0;$i<8;$i++)
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				{
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						$randnumber = rand(48,120);
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						while (($randnumber >= 58 && $randnumber <= 64) || ($randnumber >= 91 && $randnumber <= 96))
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						{
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								$randnumber = rand(48,120);
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						}
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						$randomPassword .= chr($randnumber);
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				}
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				return $randomPassword;
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		}
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}
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?>