crypt not working

[music_man]

[ original script OpenNewsLetter ]

Hi

I am trying to store an email variable in an encrypted format using crypt and then be able to view it decrypted in the administration. I presume that the decryption method used to view the email it can be applied across other functions.

Here is the page which applies the encryption (it gets variables from a URL):

---- save encrypted email ---

<?php

$encemail = $_GET["email"];

$var = "$encemail";

$enc = crypt($var);

$new_email_address = $_GET['email'];
$new_email_id = $_GET['id'];
$found = FALSE;

$file = file_get_contents('tmp.txt');
$lines = explode("\n", $file);

foreach($lines as $line)
{
  $info = explode('|', $line);
  if($info[0] == $new_email_address)
  {
    if($info[1] == $new_email_id)
    {
      $found = TRUE;
      $user_info = $info;
    }
    else
    {
      $awaiting = implode('|', $info)."\n";
    }
  }
  else
  {
    $awaiting = implode('|', $info)."\n";
  }
}

if($found)
{
  $contents = file_get_contents('subscribers.txt');
  $subscribers = explode(",", $contents);
  if(in_array($new_email_address, $subscribers))
  {
    $result = TRUE;
  }
  else
  {
    $result = FALSE;
  }

  if($result)
  {
    $msg = "<h3>Sorry, we cannot add you as... you already exist on this list...</h3>";
  }
  else
  {
    $fp = fopen("subscribers.txt", "a+");
    fwrite($fp, $enc . ",");
    fclose($fp);

 $fp2 = fopen('tmp.txt', "w");
fwrite($fp2, $awaiting);
fclose($fp2); 
    $msg = "<h3>You have been added to the newsletter. Thanks!</h3>";




  }
}
else
{
  die('I am sorry, but you cannot be added to the newsletter.');
}

$page = 'about';
include ("inc/files/header.php");
?>
        <!-- content -->
        <div id="content"><?php echo $msg; ?></div>
        <!-- // content -->
<?php
include ("inc/files/footer.php");
?> 

--- view encrypted email ---

<?
	session_start();
	require_once("xxx.php");


if($_SESSION["valid"] == true)
{
	if($_GET["action"] == "add")
	{
		$fp = fopen("subscribers.txt", "r");
		$file_text = fread($fp, 999999);
		fclose($fp);

		$subscribers = explode(",",$file_text);
		foreach($subscribers as $subscriber)
		{
			if($subscriber == $_GET["email"])
			{
				$result = 1;
				break;
			}
			else
			{
				$result = 0;
			}
		}

		if($result == 1)
		{
			$msg = "<div class=error>Cannot add subscriber, subscriber already exists...</div>";
		}
		else
		{
			$fp = fopen("subscribers.txt", "a+");
			fwrite($fp, $_GET["email"] . ",");
			fclose($fp);
			$msg = "<div class=message>Subscriber added successfully...</div>";
		}
	}

	if($_GET["action"] == "delete")
	{	
		$fp = fopen("subscribers.txt", "r");
		$file_text = fread($fp, 999999);
		fclose($fp);

		$fp = fopen("subscribers.txt", "w");
		$file_text_new = str_replace("$_GET[email],", "", $file_text);
		fwrite($fp, $file_text_new);
		fclose($fp);
		$msg = "<div class=message>Subscriber deleted successfully...</div>";
	}

	if(isset($msg)) $main .= "$msg<br>";

	$main .= "<div class=heading2>Add a subscriber</div><br>
			 <form name=add action='subscribers.php' method='get'>
			 Email<br>
			 <input class=textField type=text name=email><br><br>
			 <input type=hidden name=action value=add>
			 <input class=button type=submit value=Add>
			 </form>
			<script language=javascript>
				var validator  = new Validator('add');
				validator.addValidation('email','req','Please enter a valid email');
				validator.addValidation('email','email','Please enter a valid email');
			</script>

			 <br>

			 <div class=heading2>Delete a subscriber</div><br>
			 <form action='subscribers.php' method='get'>
			 Email<br>
			 <select class=textField name=email>";
			 $fp = fopen("subscribers.txt", "r");
			 while (!feof($fp))
			 {
				$char = fread($fp, 1);
				if($char == ",")
				{


$encemail = $buffer;

$var = "$encemail";

$enc = crypt($var);



					$main .= "<option>$enc</option>";
					$buffer = "";
				}
				else
				{
					$buffer .= "$char";
				}
			 }
			 fclose($fp);

			 $main .= "</select><br><br>
			 <input type=hidden name=action value=delete>
			 <input class=button type=submit value=Delete>
			 </form>";
}
else
{
	header("Location: index.php");
}
$page = "subscribers";
require_once("includes/template.php");
?>

If I can get the decryption thing right then I could implement it into the deletion process... I think.