password generation

   // Encrypts the password with given algorithm and salt
   private function _hashPassword($password, $algorithm, $salt) {
      if ($algorithm != "SHA1") {
         return hash_hmac($algorithm, $password, $salt);
      } else {
         return SHA1(SHA1($password));
      }
   }

   // Encrypts the password with given algorithm and salt
   private function _hashPassword($username, $password) {
      $user = strtoupper($user_name);
      $pass = strtoupper($password);
      return SHA1($user.':'.$pass);
   }