Laravel UserController with basic login function which converts old passwords on the first login. Based on http://stackoverflow.com/a/19880068

UserController.php

<?php

use Illuminate\Support\MessageBag;

class UserController extends BaseController {

    public function loginView()
    {
    	$errors = new MessageBag();
    	
    	if ($errorsOld = Input::old('errors')) {
    	    $errors = $errorsOld;
    	}
    	
    	$data = array(
    	    'errors' => $errors
    	);
    	
    	return View::make('user.login', $data);
    }

    public function login()
    {
        $validator = Validator::make(Input::all(), array(
            'username' => 'required',
            'password' => 'required'
        ));

        if ($validator->passes()) {

            $credentials = array(
                'username' => Input::get('username'),
                'password' => Input::get('password')
            );

            if (Auth::attempt($credentials)) {
                return Redirect::route('page.home');
            }

            $user = User::where('username', Input::get('username'))->first();
            if (isset($user)) {
                if ($user->password == sha1(Input::get('password'))) { // If their password is still SHA1
                    $user->password = Hash::make(Input::get('password')); // Convert to new format
                    $user->save();
                    Auth::login(Input::get('username'));
                }
            }
        }

        $data['errors'] = new MessageBag(array(
            'password' => array(
                'Login failed.'
            )
        ));

        return Redirect::route('user.login.view')->withInput($data);
    }
    
    public function logout()
    {
        Auth::logout();
        return Redirect::route('user.login.view');
    }
}