<?php
require_once('crypt_class.php');
$crypt_class = new CRYPT_CLASS;

$crypt_class->set_cipher($_REQUEST['cipher']); // set the cipher
$crypt_class->set_mode('cfb'); // set encryption mode
$crypt_class->set_key($_POST['enckey']);


if ($_POST['action'] == 'encrypt') {
   $data = $crypt_class->encrypt($_POST['text']);
} elseif ($_POST['action'] == 'decrypt') {
   $data = $crypt_class->decrypt($_POST['text']);
}
   

$ciphers = mcrypt_list_algorithms();
natsort($ciphers);

foreach ($ciphers as $cipher) {
   
   if ($_POST['cipher'] == $cipher) {
      $selected = 'selected';
   } else {
      unset($selected);
   }
   
   $cipheroptions .= '<option ' . $selected . '>' . $cipher . '</option>';
}

unset ($cipher);

?>
<p><h3>Directions:</h3></p>
<blockquote><p>
(1.) Input the data to be encrypted or decrypted into Text<br>
(2.) Type in an encryption/decryption key
(3.) Select a encryption cipher (twofish is excellent)<br>
(4.) Select Encrypt or Decrypt
(5.) Click Do It To It<br>
</p></blockquote>

<FORM method="post" action="<?php print $_SERVER['PHP_SELF']; ?>">
<table cellspacing="2" cellpadding="2">
<tr>
   <td><b>Text</b></td><td><input type="text" size="60" name="text" value="<?php print $_POST['text']; ?>"></td>
</tr>

<tr>
   <td><b>Encryption Key:</td><td><input type="text" size="32" name="enckey" value="<?php print $_POST['enckey']; ?>"></td>
</tr>

<tr>
   <td>&nbsp;</td>
</tr>

<tr>
   <td><b>Cipher:</b></td>
   <td><select name="cipher"><?php print $cipheroptions; ?></select></td>
</tr>

<tr>
   <td>&nbsp;</td>
</tr>

<tr>
   <td colspan="2"><input type="radio" name="action" value="encrypt" checked> Encrypt &nbsp;&nbsp; <input type="radio" name="action" value="decrypt"> Decrypt</td>
</tr>
</table>
<p align="center"><input type="submit" name="submit" value="Do It To It!"></p>
</FORM>

<?php
   if (isset($_POST['submit'])) {
      print '<p>Result: ' . $data . '</p>';
   }
?>