diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md index c1531675bdb..8263b086376 100644 --- a/framework/CHANGELOG.md +++ b/framework/CHANGELOG.md @@ -14,6 +14,9 @@ Yii Framework 2 Change Log - Enh #20273: Remove unnecessary `paragonie/random_compat` dependency (timwolla) - Chg #20276: Removed autogenerated migration phpdoc (userator) - Bug #20284: Revert punycode to 1.4.x which supports pre ES6 format (mtangoo) +- New #20279: Add to the `\yii\web\Request` CSRF validation by custom HTTP header (olegbaturin) +- Enh #20279: Add to the `\yii\web\Request` `csrfHeader` property to configure a custom HTTP header for CSRF validation (olegbaturin) +- Enh #20279: Add to the `\yii\web\Request` `csrfTokenSafeMethods` property to configure a custom safe HTTP methods list (olegbaturin) 2.0.51 July 18, 2024 -------------------- diff --git a/framework/web/Request.php b/framework/web/Request.php index 270c9e796ff..312654fc679 100644 --- a/framework/web/Request.php +++ b/framework/web/Request.php @@ -42,7 +42,7 @@ * not available. * @property-read CookieCollection $cookies The cookie collection. * @property-read string $csrfToken The token used to perform CSRF validation. - * @property-read string|null $csrfTokenFromHeader The CSRF token sent via [[CSRF_HEADER]] by browser. Null is + * @property-read string|null $csrfTokenFromHeader The CSRF token sent via [[csrfHeader]] by browser. Null is * returned if no such header is sent. * @property-read array $eTags The entity tags. * @property-read HeaderCollection $headers The header collection. @@ -91,7 +91,7 @@ class Request extends \yii\base\Request { /** - * The name of the HTTP header for sending CSRF token. + * Default name of the HTTP header for sending CSRF token. */ const CSRF_HEADER = 'X-CSRF-Token'; /** @@ -113,10 +113,41 @@ class Request extends \yii\base\Request * `yii.getCsrfToken()`, respectively. The [[\yii\web\YiiAsset]] asset must be registered. * You also need to include CSRF meta tags in your pages by using [[\yii\helpers\Html::csrfMetaTags()]]. * + * For SPA, you can use CSRF validation by custom header with a random or an empty value. + * Include a header with the name specified by [[csrfHeader]] to requests that must be validated. + * Warning! CSRF validation by custom header can be used only for same-origin requests or + * with CORS configured to allow requests from the list of specific origins only. + * * @see Controller::enableCsrfValidation * @see https://en.wikipedia.org/wiki/Cross-site_request_forgery */ public $enableCsrfValidation = true; + /** + * @var string the name of the HTTP header for sending CSRF token. Defaults to [[CSRF_HEADER]]. + * This property may be changed for Yii API applications only. + * Don't change this property for Yii Web application. + */ + public $csrfHeader = self::CSRF_HEADER; + /** + * @var array the name of the HTTP header for sending CSRF token. + * by default validate CSRF token on non-"safe" methods only + * This property is used only when [[enableCsrfValidation]] is true. + * @see https://datatracker.ietf.org/doc/html/rfc9110#name-safe-methods + */ + public $csrfTokenSafeMethods = ['GET', 'HEAD', 'OPTIONS']; + /** + * @var array "unsafe" methods not triggered a CORS-preflight request + * This property is used only when both [[enableCsrfValidation]] and [[validateCsrfHeaderOnly]] are true. + * @see https://fetch.spec.whatwg.org/#http-cors-protocol + */ + public $csrfHeaderUnsafeMethods = ['GET', 'HEAD', 'POST']; + /** + * @var bool whether to use custom header only to CSRF validation of SPA. Defaults to false. + * If false and [[enableCsrfValidation]] is true, CSRF validation by token will used. + * Warning! CSRF validation by custom header can be used for Yii API applications only. + * @see https://cheatsheetseries.owasp.org/cheatsheets/Cross-Site_Request_Forgery_Prevention_Cheat_Sheet.html#employing-custom-request-headers-for-ajaxapi + */ + public $validateCsrfHeaderOnly = false; /** * @var string the name of the token used to prevent CSRF. Defaults to '_csrf'. * This property is used only when [[enableCsrfValidation]] is true. @@ -1772,10 +1803,14 @@ protected function loadCookies() * along via a hidden field of an HTML form or an HTTP header value to support CSRF validation. * @param bool $regenerate whether to regenerate CSRF token. When this parameter is true, each time * this method is called, a new CSRF token will be generated and persisted (in session or cookie). - * @return string the token used to perform CSRF validation. + * @return null|string the token used to perform CSRF validation. Null is returned if the [[validateCsrfHeaderOnly]] is true. */ public function getCsrfToken($regenerate = false) { + if ($this->validateCsrfHeaderOnly) { + return null; + } + if ($this->_csrfToken === null || $regenerate) { $token = $this->loadCsrfToken(); if ($regenerate || empty($token)) { @@ -1819,11 +1854,11 @@ protected function generateCsrfToken() } /** - * @return string|null the CSRF token sent via [[CSRF_HEADER]] by browser. Null is returned if no such header is sent. + * @return string|null the CSRF token sent via [[csrfHeader]] by browser. Null is returned if no such header is sent. */ public function getCsrfTokenFromHeader() { - return $this->headers->get(static::CSRF_HEADER); + return $this->headers->get($this->csrfHeader); } /** @@ -1860,8 +1895,14 @@ protected function createCsrfCookie($token) public function validateCsrfToken($clientSuppliedToken = null) { $method = $this->getMethod(); - // only validate CSRF token on non-"safe" methods https://tools.ietf.org/html/rfc2616#section-9.1.1 - if (!$this->enableCsrfValidation || in_array($method, ['GET', 'HEAD', 'OPTIONS'], true)) { + + if ($this->validateCsrfHeaderOnly) { + return in_array($method, $this->csrfHeaderUnsafeMethods, true) + ? $this->headers->has($this->csrfHeader) + : true; + } + + if (!$this->enableCsrfValidation || in_array($method, $this->csrfTokenSafeMethods, true)) { return true; } diff --git a/tests/framework/web/RequestTest.php b/tests/framework/web/RequestTest.php index ec493e95b7c..932392e187d 100644 --- a/tests/framework/web/RequestTest.php +++ b/tests/framework/web/RequestTest.php @@ -211,6 +211,124 @@ public function testCsrfTokenHeader() } } + public function testCustomSafeMethodsCsrfTokenValidation() + { + $this->mockWebApplication(); + + $request = new Request(); + $request->csrfTokenSafeMethods = ['OPTIONS']; + $request->enableCsrfCookie = false; + $request->enableCsrfValidation = true; + + $token = $request->getCsrfToken(); + + // accept any value on custom safe request + foreach (['OPTIONS'] as $method) { + $_SERVER['REQUEST_METHOD'] = $method; + $this->assertTrue($request->validateCsrfToken($token)); + $this->assertTrue($request->validateCsrfToken($token . 'a')); + $this->assertTrue($request->validateCsrfToken([])); + $this->assertTrue($request->validateCsrfToken([$token])); + $this->assertTrue($request->validateCsrfToken(0)); + $this->assertTrue($request->validateCsrfToken(null)); + $this->assertTrue($request->validateCsrfToken()); + } + + // only accept valid token on other requests + foreach (['GET', 'HEAD', 'POST'] as $method) { + $_SERVER['REQUEST_METHOD'] = $method; + $this->assertTrue($request->validateCsrfToken($token)); + $this->assertFalse($request->validateCsrfToken($token . 'a')); + $this->assertFalse($request->validateCsrfToken([])); + $this->assertFalse($request->validateCsrfToken([$token])); + $this->assertFalse($request->validateCsrfToken(0)); + $this->assertFalse($request->validateCsrfToken(null)); + $this->assertFalse($request->validateCsrfToken()); + } + } + + public function testCsrfHeaderValidation() + { + $this->mockWebApplication(); + + $request = new Request(); + $request->validateCsrfHeaderOnly = true; + $request->enableCsrfValidation = true; + + // only accept valid header on unsafe requests + foreach (['GET', 'HEAD', 'POST'] as $method) { + $_SERVER['REQUEST_METHOD'] = $method; + $request->headers->remove(Request::CSRF_HEADER); + $this->assertFalse($request->validateCsrfToken()); + + $request->headers->add(Request::CSRF_HEADER, ''); + $this->assertTrue($request->validateCsrfToken()); + } + + // accept no value on other requests + foreach (['DELETE', 'PATCH', 'PUT', 'OPTIONS'] as $method) { + $_SERVER['REQUEST_METHOD'] = $method; + $this->assertTrue($request->validateCsrfToken()); + } + } + + public function testCustomHeaderCsrfHeaderValidation() + { + $this->mockWebApplication(); + + $request = new Request(); + $request->csrfHeader = 'X-JGURDA'; + $request->validateCsrfHeaderOnly = true; + $request->enableCsrfValidation = true; + + // only accept valid header on unsafe requests + foreach (['GET', 'HEAD', 'POST'] as $method) { + $_SERVER['REQUEST_METHOD'] = $method; + $request->headers->remove('X-JGURDA'); + $this->assertFalse($request->validateCsrfToken()); + + $request->headers->add('X-JGURDA', ''); + $this->assertTrue($request->validateCsrfToken()); + } + } + + public function testCustomUnsafeMethodsCsrfHeaderValidation() + { + $this->mockWebApplication(); + + $request = new Request(); + $request->csrfHeaderUnsafeMethods = ['POST']; + $request->validateCsrfHeaderOnly = true; + $request->enableCsrfValidation = true; + + // only accept valid custom header on unsafe requests + foreach (['POST'] as $method) { + $_SERVER['REQUEST_METHOD'] = $method; + $request->headers->remove(Request::CSRF_HEADER); + $this->assertFalse($request->validateCsrfToken()); + + $request->headers->add(Request::CSRF_HEADER, ''); + $this->assertTrue($request->validateCsrfToken()); + } + + // accept no value on other requests + foreach (['GET', 'HEAD'] as $method) { + $_SERVER['REQUEST_METHOD'] = $method; + $request->headers->remove(Request::CSRF_HEADER); + $this->assertTrue($request->validateCsrfToken()); + } + } + + public function testNoCsrfTokenCsrfHeaderValidation() + { + $this->mockWebApplication(); + + $request = new Request(); + $request->validateCsrfHeaderOnly = true; + + $this->assertEquals($request->getCsrfToken(), null); + } + public function testResolve() { $this->mockWebApplication([