Issue #3427911: Add several minutes of default leeway to reduce issues with time mis-alignment

modules/users_jwt/src/Authentication/Provider/UsersJwtAuth.php

@@ -74,6 +74,9 @@ class UsersJwtAuth implements AuthenticationProviderInterface {
     if (!$jwt_class) {
       $jwt_class = JWT::class;
     }
+    if (property_exists($jwt_class, 'leeway')) {
+      $jwt_class::$leeway = 300;
+    }
     $this->transcoder = new $jwt_class();
   }
 

src/Transcoder/JwtTranscoder.php

@@ -99,6 +99,9 @@ class JwtTranscoder implements JwtTranscoderInterface {
     if (!$jwt_class) {
       $jwt_class = JWT::class;
     }
+    if (property_exists($jwt_class, 'leeway')) {
+      $jwt_class::$leeway = 300;
+    }
     $this->transcoder = new $jwt_class();
     if ($key) {
       $this->setKey($key);

tests/modules/jwt_test/jwt_test.services.yml

+services:
+  jwt_test_auth_issuer.subscriber:
+    class: Drupal\jwt_test\EventSubscriber\JwtTestAuthIssuerSubscriber
+    tags:
+      - { name: event_subscriber }

tests/modules/jwt_test/src/EventSubscriber/JwtTestAuthIssuerSubscriber.php

+<?php
+
+namespace Drupal\jwt_test\EventSubscriber;
+
+use Drupal\jwt\Authentication\Event\JwtAuthEvents;
+use Drupal\jwt\Authentication\Event\JwtAuthGenerateEvent;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+/**
+ * Modify claims on a JWT being issued for testing.
+ */
+class JwtTestAuthIssuerSubscriber implements EventSubscriberInterface {
+
+  /**
+   * Modifications to make to the claims.
+   *
+   * @var array
+   */
+  public static array $modifications = [];
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getSubscribedEvents() {
+    $events = [];
+    $events[JwtAuthEvents::GENERATE][] = ['modifyStandardClaims', 20];
+    return $events;
+  }
+
+  /**
+   * Modify the standard claims set for a JWT.
+   *
+   * @param \Drupal\jwt\Authentication\Event\JwtAuthGenerateEvent $event
+   *   The event.
+   */
+  public function modifyStandardClaims(JwtAuthGenerateEvent $event) {
+    foreach (static::$modifications as $claim => $value) {
+      $event->addClaim($claim, $value);
+    }
+  }
+
+}

tests/src/Functional/JwtAuthTest.php

@@ -4,6 +4,7 @@ namespace Drupal\Tests\jwt\Functional;
 
 use Drupal\Component\Render\FormattableMarkup;
 use Drupal\Core\Url;
+use Drupal\jwt_test\EventSubscriber\JwtTestAuthIssuerSubscriber;
 use Drupal\Tests\BrowserTestBase;
 
 /**
@@ -83,6 +84,32 @@ class JwtAuthTest extends BrowserTestBase {
         $this->mink->resetSessions();
       }
     }
+    // Test the 300 seconds of default leeway on nbf, iat, and exp values.
+    $url = Url::fromRoute('jwt_test.11.2');
+    $time = time();
+    $test_cases = [
+      ['claims' => ['iat' => $time + 250], 'code' => 200],
+      ['claims' => ['nbf' => $time + 250], 'code' => 200],
+      ['claims' => ['exp' => $time - 250], 'code' => 200],
+      ['claims' => ['iat' => $time + 350], 'code' => 403],
+      ['claims' => ['nbf' => $time + 350], 'code' => 403],
+      ['claims' => ['iat' => $time, 'nbf' => $time + 350], 'code' => 403],
+      ['claims' => ['exp' => $time - 350], 'code' => 403],
+    ];
+    foreach ($test_cases as $case) {
+      JwtTestAuthIssuerSubscriber::$modifications = $case['claims'];
+      $token = $auth->generateToken();
+      $headers = [
+        'Authorization' => 'Bearer ' . $token,
+      ];
+      $this->drupalGet($url, [], $headers);
+      $this->assertSession()->statusCodeEquals($case['code']);
+      if ($case['code'] === 200) {
+        $this->assertSession()->pageTextContains($account->getAccountName());
+      }
+      $this->mink->resetSessions();
+    }
+    JwtTestAuthIssuerSubscriber::$modifications = [];
     // The front page should return a 200 even for an invalid JWT.
     foreach (['Authorization', 'JWT-Authorization'] as $header_name) {
       $headers = [
@@ -101,6 +128,7 @@ class JwtAuthTest extends BrowserTestBase {
     $this->assertEquals($this->getSession()->getResponseHeader('X-Drupal-Cache'), 'MISS');
     $this->drupalGet($url);
     $this->assertEquals($this->getSession()->getResponseHeader('X-Drupal-Cache'), 'HIT');
+    $token = $auth->generateToken();
     foreach (['Authorization', 'JWT-Authorization'] as $header_name) {
       $headers = [
         $header_name => 'Bearer ' . $token,
@@ -134,6 +162,7 @@ class JwtAuthTest extends BrowserTestBase {
     $code = (int) $this->getSession()->getStatusCode();
     $this->assertTrue(in_array($code, [401, 403], TRUE), 'Access is not granted.');
     $this->mink->resetSessions();
+    $token = $auth->generateToken();
     $headers += ['JWT-Authorization' => 'Bearer ' . $token];
     $this->drupalGet($url, [], $headers);
     $this->assertSession()->statusCodeEquals(200);