Помогите пожалуйста поставить хэширование Md5 при авторизации на пароль
Немогу никак понять :huh:

<? $this->pageTitle = 'Авторизация - '.Yii::app()->params->sitename; ?>
<?
	if(!Yii::app()->user->isGuest)
		$this->redirect(Yii::app()->baseUrl.'/id'.Yii::app()->user->userid);
?>
<center>
<h3 align="center" class="title">Авторизация</h3>
<h5 align="center" class="muted"> Введите ваш логин и пароль</h5>
	<form class="form-vertical" id="login-form" action="/site/login" method="post">		<div class="row">
			<div class="col-xs-2"></div>
			<div class="col-xs-8">
				<input placeholder="Ник.." class="form-control col-xs-3" name="LoginForm[username]" id="LoginForm_username" type="text" />				<input placeholder="Пароль.." class="form-control" style="margin-top:40px" name="LoginForm[password]" id="LoginForm_password" type="password" />			
			</div>
			
			<div class="col-xs-3">
					
			</div>
			<div class="col-xs-2"></div>
		</div>			<br>  <button class="btn btn-success" style="border-radius:0;width:258px;" type="submit">Войти</button>
<a href="/site/recovery/"><button class="btn btn-warning" style="border-radius:0;margin-top: 0px;width:258px;" href="/site/recovery/" type="button" >Забыли пароль?</button></a>
</center>

<?php
class LoginForm extends CFormModel {
	public $username;
	public $password;
	private $_identity;
	public function rules() {
		return array(
			array('username', 'required','message'=>'Введите логин'),
			array('password', 'required','message'=>'Введите пароль'),
			array('password', 'authenticate'),
		);
	}
	public function authenticate($attribute,$params) {
		if(!$this->hasErrors()) {
			$this->_identity=new UserIdentity($this->username,$this->password);
			if(!$this->_identity->authenticate())
				$this->addError('password','Неверное имя пользователя или пароль.');
		}
	}
	public function login() {
		if($this->_identity===null) {
			$this->_identity=new UserIdentity($this->username,$this->password);
			$this->_identity->authenticate();
		}
		if($this->_identity->errorCode===UserIdentity::ERROR_NONE) {
			Yii::app()->user->login($this->_identity);
			return true;
		}
		else return false;
	}
}
?>

<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
    private $_id;
 
    public function authenticate() {
        $username = strtolower($this->username);
        $names = Fields::getNames(1);
        $find = 'LOWER('.$names[username][alias].')=?';
        $user = Users::model()->find($find,array($username));
        if($user===null) $this->errorCode=self::ERROR_USERNAME_INVALID;
        else if(!$user->validatePassword($this->password)) $this->errorCode=self::ERROR_PASSWORD_INVALID;
        else {
            $this->_id = $user->{$names[id][alias]};
            $this->username = $user->{$names[username][alias]};
			$this->setState('userid',$this->_id);
			$this->setState('username',$this->username);
            $this->setState('skinid',$user->{$names[skin][alias]});
            $this->setState('admin',$user->{$names[admin][alias]});
            $this->errorCode=self::ERROR_NONE;
        }
        return $this->errorCode==self::ERROR_NONE;
    }
    public function getId() {
        return $this->_id;
    }
}
?>