diff -r 03a60844c7c5 -r 2529833a7731 includes/sessions.php
--- a/includes/sessions.php	Mon Jun 30 17:20:02 2008 -0400
+++ b/includes/sessions.php	Mon Jun 30 17:22:29 2008 -0400
@@ -136,11 +136,12 @@
   var $unread_pms = 0;
   
   /**
-   * AES key used to encrypt passwords and session key info - irreversibly destroyed when disallow_password_grab() is called
+   * AES key used to encrypt passwords and session key info.
    * @var string
+   * @access private
    */
    
-  var $private_key;
+  protected $private_key;
   
   /**
    * Regex that defines a valid username, minus the ^ and $, these are added later
@@ -2407,6 +2408,32 @@
     return 'success';
   }
   
+  /**
+   * Encrypts a string using the site's private key.
+   * @param string
+   * @param int Return type - one of ENC_BINARY, ENC_HEX, ENC_BASE64
+   * @return string
+   */
+  
+  function pk_encrypt($string, $return_type = ENC_HEX)
+  {
+    $aes = AESCrypt::singleton(AES_BITS, AES_BLOCKSIZE);
+    return $aes->encrypt($string, $this->private_key, $return_type);
+  }
+  
+  /**
+   * Encrypts a string using the site's private key.
+   * @param string
+   * @param int Input type - one of ENC_BINARY, ENC_HEX, ENC_BASE64
+   * @return string
+   */
+  
+  function pk_decrypt($string, $input_type = ENC_HEX)
+  {
+    $aes = AESCrypt::singleton(AES_BITS, AES_BLOCKSIZE);
+    return $aes->decrypt($string, $this->private_key, $input_type);
+  }
+  
   #
   # USER RANKS
   #