<?php
/**
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @since         3.0.0
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */
namespace Cake\Test\TestCase\Controller\Component;

use Cake\Controller\ComponentRegistry;
use Cake\Controller\Component\CsrfComponent;
use Cake\Event\Event;
use Cake\Network\Request;
use Cake\Network\Response;
use Cake\TestSuite\TestCase;

/**
 * CsrfComponent test.
 */
class CsrfComponentTest extends TestCase {

/**
 * setup
 *
 * @return void
 */
	public function setUp() {
		parent::setUp();

		$controller = $this->getMock('Cake\Controller\Controller', ['redirect']);
		$this->registry = new ComponentRegistry($controller);
		$this->component = new CsrfComponent($this->registry);
	}

/**
 * teardown
 *
 * @return void
 */
	public function tearDown() {
		parent::tearDown();
		unset($this->component);
	}

/**
 * Test setting the cookie value
 *
 * @return void
 * @triggers Controller.startup $controller
 */
	public function testSettingCookie() {
		$_SERVER['REQUEST_METHOD'] = 'GET';

		$controller = $this->getMock('Cake\Controller\Controller', ['redirect']);
		$controller->request = new Request(['base' => '/dir']);
		$controller->response = new Response();

		$event = new Event('Controller.startup', $controller);
		$this->component->startUp($event);

		$cookie = $controller->response->cookie('csrfToken');
		$this->assertNotEmpty($cookie, 'Should set a token.');
		$this->assertRegExp('/^[a-f0-9]+$/', $cookie['value'], 'Should look like a hash.');
		$this->assertEquals(0, $cookie['expiry'], 'session duration.');
		$this->assertEquals('/dir', $cookie['path'], 'session path.');

		$this->assertEquals($cookie['value'], $controller->request->params['_csrfToken']);
	}

/**
 * Data provider for HTTP method tests.
 *
 * @return void
 */
	public static function httpMethodProvider() {
		return [
			['PATCH'], ['PUT'], ['POST'], ['DELETE']
		];
	}

/**
 * Test that the X-CSRF-Token works with the various http methods.
 *
 * @dataProvider httpMethodProvider
 * @return void
 * @triggers Controller.startup $controller
 */
	public function testValidTokenInHeader($method) {
		$_SERVER['REQUEST_METHOD'] = $method;
		$_SERVER['HTTP_X_CSRF_TOKEN'] = 'testing123';

		$controller = $this->getMock('Cake\Controller\Controller', ['redirect']);
		$controller->request = new Request(['cookies' => ['csrfToken' => 'testing123']]);
		$controller->response = new Response();

		$event = new Event('Controller.startup', $controller);
		$result = $this->component->startUp($event);
		$this->assertNull($result, 'No exception means valid.');
	}

/**
 * Test that the X-CSRF-Token works with the various http methods.
 *
 * @dataProvider httpMethodProvider
 * @expectedException \Cake\Network\Exception\ForbiddenException
 * @return void
 * @triggers Controller.startup $controller
 */
	public function testInvalidTokenInHeader($method) {
		$_SERVER['REQUEST_METHOD'] = $method;
		$_SERVER['HTTP_X_CSRF_TOKEN'] = 'nope';

		$controller = $this->getMock('Cake\Controller\Controller', ['redirect']);
		$controller->request = new Request([
			'cookies' => ['csrfToken' => 'testing123']
		]);
		$controller->response = new Response();

		$event = new Event('Controller.startup', $controller);
		$this->component->startUp($event);
	}

/**
 * Test that request data works with the various http methods.
 *
 * @dataProvider httpMethodProvider
 * @return void
 * @triggers Controller.startup $controller
 */
	public function testValidTokenRequestData($method) {
		$_SERVER['REQUEST_METHOD'] = $method;

		$controller = $this->getMock('Cake\Controller\Controller', ['redirect']);
		$controller->request = new Request([
			'post' => ['_csrfToken' => 'testing123'],
			'cookies' => ['csrfToken' => 'testing123']
		]);
		$controller->response = new Response();

		$event = new Event('Controller.startup', $controller);
		$result = $this->component->startUp($event);
		$this->assertNull($result, 'No exception means valid.');
	}

/**
 * Test that request data works with the various http methods.
 *
 * @dataProvider httpMethodProvider
 * @expectedException \Cake\Network\Exception\ForbiddenException
 * @return void
 * @triggers Controller.startup $controller
 */
	public function testInvalidTokenRequestData($method) {
		$_SERVER['REQUEST_METHOD'] = $method;

		$controller = $this->getMock('Cake\Controller\Controller', ['redirect']);
		$controller->request = new Request([
			'post' => ['_csrfToken' => 'nope'],
			'cookies' => ['csrfToken' => 'testing123']
		]);
		$controller->response = new Response();

		$event = new Event('Controller.startup', $controller);
		$this->component->startUp($event);
	}

/**
 * Test that CSRF checks are not applied to request action requests.
 *
 * @return void
 * @triggers Controller.startup $controller
 */
	public function testCsrfValidationSkipsRequestAction() {
		$_SERVER['REQUEST_METHOD'] = 'POST';

		$controller = $this->getMock('Cake\Controller\Controller', ['redirect']);
		$controller->request = new Request([
			'params' => ['requested' => 1],
			'post' => ['_csrfToken' => 'nope'],
			'cookies' => ['csrfToken' => 'testing123']
		]);
		$controller->response = new Response();

		$event = new Event('Controller.startup', $controller);
		$result = $this->component->startUp($event);
		$this->assertNull($result, 'No error.');
		$this->assertEquals('testing123', $controller->request->params['_csrfToken']);
	}

/**
 * Test that the configuration options work.
 *
 * @return void
 * @triggers Controller.startup $controller
 */
	public function testConfigurationCookieCreate() {
		$_SERVER['REQUEST_METHOD'] = 'GET';

		$controller = $this->getMock('Cake\Controller\Controller', ['redirect']);
		$controller->request = new Request(['base' => '/dir']);
		$controller->response = new Response();

		$component = new CsrfComponent($this->registry, [
			'cookieName' => 'token',
			'expiry' => 90,
			'secure' => true
		]);

		$event = new Event('Controller.startup', $controller);
		$component->startUp($event);

		$this->assertEmpty($controller->response->cookie('csrfToken'));
		$cookie = $controller->response->cookie('token');
		$this->assertNotEmpty($cookie, 'Should set a token.');
		$this->assertRegExp('/^[a-f0-9]+$/', $cookie['value'], 'Should look like a hash.');
		$this->assertEquals(90, $cookie['expiry'], 'session duration.');
		$this->assertEquals('/dir', $cookie['path'], 'session path.');
		$this->assertTrue($cookie['secure'], 'cookie security flag missing');
	}

/**
 * Test that the configuration options work.
 *
 * @return void
 * @triggers Controller.startup $controller
 */
	public function testConfigurationValidate() {
		$_SERVER['REQUEST_METHOD'] = 'POST';

		$controller = $this->getMock('Cake\Controller\Controller', ['redirect']);
		$controller->request = new Request([
			'cookies' => ['csrfToken' => 'nope', 'token' => 'yes'],
			'post' => ['_csrfToken' => 'no match', 'token' => 'yes'],
		]);
		$controller->response = new Response();

		$component = new CsrfComponent($this->registry, [
			'cookieName' => 'token',
			'field' => 'token',
			'expiry' => 90,
		]);

		$event = new Event('Controller.startup', $controller);
		$result = $component->startUp($event);
		$this->assertNull($result, 'Config settings should work.');
	}

}