Improved testing

src/Exception/OAuthServerException.php

@@ -286,4 +286,12 @@ class OAuthServerException extends \Exception
     {
         return $this->httpStatusCode;
     }
+
+    /**
+     * @return null|string
+     */
+    public function getHint()
+    {
+        return $this->hint;
+    }
 }

src/Grant/AbstractGrant.php

@@ -16,6 +16,7 @@ use League\Event\Event;
 use League\OAuth2\Server\Entities\AccessTokenEntity;
 use League\OAuth2\Server\Entities\AuthCodeEntity;
 use League\OAuth2\Server\Entities\Interfaces\ClientEntityInterface;
+use League\OAuth2\Server\Entities\Interfaces\ScopeEntityInterface;
 use League\OAuth2\Server\Entities\RefreshTokenEntity;
 use League\OAuth2\Server\Entities\ScopeEntity;
 use League\OAuth2\Server\Exception\OAuthServerException;
@@ -344,6 +345,11 @@ abstract class AbstractGrant implements GrantTypeInterface
         $accessToken->setUserIdentifier($userIdentifier);
 
         foreach ($scopes as $scope) {
+            if (is_string($scope)) {
+                $s = new ScopeEntity();
+                $s->setIdentifier($scope);
+                $scope = $s;
+            }
             $accessToken->addScope($scope);
         }
 
@@ -435,8 +441,7 @@ abstract class AbstractGrant implements GrantTypeInterface
      */
     public function canRespondToRequest(ServerRequestInterface $request)
     {
-        return
+        return isset($request->getParsedBody()['grant_type'])
-            isset($request->getParsedBody()['grant_type'])
         && $request->getParsedBody()['grant_type'] === $this->getIdentifier();
     }
 }

src/Grant/AuthCodeGrant.php

@@ -108,6 +108,11 @@ class AuthCodeGrant extends AbstractGrant
             throw OAuthServerException::invalidClient();
         }
 
+        $redirectUriParameter = $this->getQueryStringParameter('redirect_uri', $request, $client->getRedirectUri());
+        if ($redirectUriParameter !== $client->getRedirectUri()) {
+            throw OAuthServerException::invalidClient();
+        }
+
         $scopes = $this->validateScopes($request, $client, $client->getRedirectUri());
         $queryString = http_build_query($request->getQueryParams());
         $postbackUri = new Uri(
@@ -224,6 +229,7 @@ class AuthCodeGrant extends AbstractGrant
                 json_encode(
                     [
                         'client_id'    => $authCode->getClient()->getIdentifier(),
+                        'redirect_uri' => $authCode->getRedirectUri(),
                         'auth_code_id' => $authCode->getIdentifier(),
                         'scopes'       => $authCode->getScopes(),
                         'user_id'      => $authCode->getUserIdentifier(),
@@ -258,7 +264,7 @@ class AuthCodeGrant extends AbstractGrant
         DateInterval $accessTokenTTL
     ) {
         // The redirect URI is required in this request
-        $redirectUri = $this->getQueryStringParameter('redirect_uri', $request, null);
+        $redirectUri = $this->getRequestParameter('redirect_uri', $request, null);
         if (is_null($redirectUri)) {
             throw OAuthServerException::invalidRequest('redirect_uri');
         }
@@ -285,6 +291,10 @@ class AuthCodeGrant extends AbstractGrant
             if ($authCodePayload->client_id !== $client->getIdentifier()) {
                 throw OAuthServerException::invalidRequest('code', 'Authorization code was not issued to this client');
             }
+
+            if ($authCodePayload->redirect_uri !== $redirectUri) {
+                throw OAuthServerException::invalidRequest('redirect_uri', 'Invalid redirect URI');
+            }
         } catch (\LogicException  $e) {
             throw OAuthServerException::invalidRequest('code', 'Cannot decrypt the authorization code');
         }
@@ -341,13 +351,8 @@ class AuthCodeGrant extends AbstractGrant
             && $request->getQueryParams()['response_type'] === 'code'
         ) {
             return $this->respondToAuthorizationRequest($request);
-        } elseif (
-            array_key_exists('grant_type', $request->getParsedBody())
-            && $request->getParsedBody()['grant_type'] === 'authorization_code'
-        ) {
-            return $this->respondToAccessTokenRequest($request, $responseType, $accessTokenTTL);
-        } else {
-            throw OAuthServerException::serverError('respondToRequest() should not have been called');
         }
+
+        return $this->respondToAccessTokenRequest($request, $responseType, $accessTokenTTL);
     }
 }

tests/Grant/AuthCodeGrantTest.php

@@ -3,10 +3,14 @@
 namespace LeagueTests\Grant;
 
 use League\OAuth2\Server\Entities\ClientEntity;
+use League\OAuth2\Server\Entities\Interfaces\AccessTokenEntityInterface;
+use League\OAuth2\Server\Entities\Interfaces\RefreshTokenEntityInterface;
+use League\OAuth2\Server\Exception\OAuthServerException;
 use League\OAuth2\Server\Grant\AuthCodeGrant;
 use League\OAuth2\Server\Repositories\AuthCodeRepositoryInterface;
 use League\OAuth2\Server\Repositories\ClientRepositoryInterface;
 use League\OAuth2\Server\Repositories\RefreshTokenRepositoryInterface;
+use League\OAuth2\Server\Repositories\AccessTokenRepositoryInterface;
 use League\OAuth2\Server\Repositories\UserRepositoryInterface;
 use League\OAuth2\Server\Utils\KeyCrypt;
 use LeagueTests\Stubs\StubResponseType;
@@ -24,8 +28,8 @@ class AuthCodeGrantTest extends \PHPUnit_Framework_TestCase
             $this->getMock(RefreshTokenRepositoryInterface::class),
             $this->getMock(UserRepositoryInterface::class),
             new \DateInterval('PT10M'),
-            '',
+            'foo/bar.php',
-            ''
+            'foo/bar.php'
         );
 
         $this->assertEquals('authorization_code', $grant->getIdentifier());
@@ -234,10 +238,6 @@ class AuthCodeGrantTest extends \PHPUnit_Framework_TestCase
         $this->assertTrue($response instanceof ResponseInterface);
     }
 
-    /**
-     * @expectedException \League\OAuth2\Server\Exception\OAuthServerException
-     * @expectedExceptionCode 4
-     */
     public function testRespondToAuthorizationRequestBadClient()
     {
         $client = null;
@@ -252,9 +252,7 @@ class AuthCodeGrantTest extends \PHPUnit_Framework_TestCase
             $this->getMock(AuthCodeRepositoryInterface::class),
             $this->getMock(RefreshTokenRepositoryInterface::class),
             $userRepositoryMock,
-            new \DateInterval('PT10M'),
+            new \DateInterval('PT10M')
-            '',
-            ''
         );
         $grant->setClientRepository($clientRepositoryMock);
         $grant->setPathToPublicKey('file://' . __DIR__ . '/../Utils/public.key');
@@ -288,9 +286,69 @@ class AuthCodeGrantTest extends \PHPUnit_Framework_TestCase
             ]
         );
 
-        $response = $grant->respondToRequest($request, new StubResponseType(), new \DateInterval('PT10M'));
+        try {
+            /** @var StubResponseType $response */
+            $grant->respondToRequest($request, new StubResponseType(), new \DateInterval('PT10M'));
+        } catch (OAuthServerException $e) {
+            $this->assertEquals($e->getMessage(), 'Client authentication failed');
+        }
+    }
 
-        $this->assertTrue($response instanceof ResponseInterface);
+    public function testRespondToAuthorizationRequestBadRedirectUri()
+    {
+        $client = new ClientEntity();
+        $clientRepositoryMock = $this->getMockBuilder(ClientRepositoryInterface::class)->getMock();
+        $clientRepositoryMock->method('getClientEntity')->willReturn($client);
+
+        $userRepositoryMock = $this->getMockBuilder(UserRepositoryInterface::class)->getMock();
+        $userEntity = new UserEntity();
+        $userRepositoryMock->method('getUserEntityByUserCredentials')->willReturn($userEntity);
+
+        $grant = new AuthCodeGrant(
+            $this->getMock(AuthCodeRepositoryInterface::class),
+            $this->getMock(RefreshTokenRepositoryInterface::class),
+            $userRepositoryMock,
+            new \DateInterval('PT10M')
+        );
+        $grant->setClientRepository($clientRepositoryMock);
+        $grant->setPathToPublicKey('file://' . __DIR__ . '/../Utils/public.key');
+        $grant->setPathToPrivateKey('file://' . __DIR__ . '/../Utils/private.key');
+
+        $request = new ServerRequest(
+            [
+                'HTTP_HOST'   => 'auth-server.tld',
+                'REQUEST_URI' => '/authorize',
+            ],
+            []
+            ,
+            null,
+            'POST',
+            'php://input',
+            [],
+            [
+                'oauth_authorize_request' => KeyCrypt::encrypt(
+                    json_encode(['user_id' => 123]),
+                    'file://' . __DIR__ . '/../Utils/private.key'
+                ),
+            ],
+            [
+                'response_type' => 'code',
+                'client_id'     => 'foo',
+                'redirect_uri'  =>  'sdfsdf'
+            ],
+            [
+                'username' => 'alex',
+                'password' => 'whisky',
+                'action'   => 'approve',
+            ]
+        );
+
+        try {
+            /** @var StubResponseType $response */
+            $grant->respondToRequest($request, new StubResponseType(), new \DateInterval('PT10M'));
+        } catch (OAuthServerException $e) {
+            $this->assertEquals($e->getMessage(), 'Client authentication failed');
+        }
     }
 
     /**
@@ -516,4 +574,426 @@ class AuthCodeGrantTest extends \PHPUnit_Framework_TestCase
         $this->assertTrue($response instanceof ResponseInterface);
         $this->assertTrue(strstr($response->getHeader('set-cookie')[0], 'oauth_authorize_request') !== false);
     }
+
+    public function testRespondToAccessTokenRequest()
+    {
+        $client = new ClientEntity();
+        $client->setIdentifier('foo');
+        $client->setRedirectUri('http://foo/bar');
+        $clientRepositoryMock = $this->getMockBuilder(ClientRepositoryInterface::class)->getMock();
+        $clientRepositoryMock->method('getClientEntity')->willReturn($client);
+
+        $userRepositoryMock = $this->getMockBuilder(UserRepositoryInterface::class)->getMock();
+        $userEntity = new UserEntity();
+        $userRepositoryMock->method('getUserEntityByUserCredentials')->willReturn($userEntity);
+
+        $accessTokenRepositoryMock = $this->getMockBuilder(AccessTokenRepositoryInterface::class)->getMock();
+        $accessTokenRepositoryMock->method('persistNewAccessToken')->willReturnSelf();
+
+        $refreshTokenRepositoryMock = $this->getMockBuilder(RefreshTokenRepositoryInterface::class)->getMock();
+        $refreshTokenRepositoryMock->method('persistNewRefreshToken')->willReturnSelf();
+
+        $grant = new AuthCodeGrant(
+            $this->getMock(AuthCodeRepositoryInterface::class),
+            $this->getMock(RefreshTokenRepositoryInterface::class),
+            $userRepositoryMock,
+            new \DateInterval('PT10M')
+        );
+        $grant->setClientRepository($clientRepositoryMock);
+        $grant->setAccessTokenRepository($accessTokenRepositoryMock);
+        $grant->setRefreshTokenRepository($refreshTokenRepositoryMock);
+        $grant->setPathToPublicKey('file://' . __DIR__ . '/../Utils/public.key');
+        $grant->setPathToPrivateKey('file://' . __DIR__ . '/../Utils/private.key');
+
+        $request = new ServerRequest(
+            [],
+            []
+            ,
+            null,
+            'POST',
+            'php://input',
+            [],
+            [],
+            [],
+            [
+                'grant_type'   => 'authorization_code',
+                'client_id'    => 'foo',
+                'redirect_uri' => 'http://foo/bar',
+                'code'         => KeyCrypt::encrypt(
+                    json_encode(
+                        [
+                            'auth_code_id' => uniqid(),
+                            'expire_time'  => time() + 3600,
+                            'client_id'    => 'foo',
+                            'user_id'      => 123,
+                            'scopes'       => ['foo'],
+                            'redirect_uri' => 'http://foo/bar',
+                        ]
+                    ),
+                    'file://' . __DIR__ . '/../Utils/private.key'
+                ),
+            ]
+        );
+
+        /** @var StubResponseType $response */
+        $response = $grant->respondToRequest($request, new StubResponseType(), new \DateInterval('PT10M'));
+
+        $this->assertTrue($response->getAccessToken() instanceof AccessTokenEntityInterface);
+        $this->assertTrue($response->getRefreshToken() instanceof RefreshTokenEntityInterface);
+    }
+
+    /**
+     * @expectedException \League\OAuth2\Server\Exception\OAuthServerException
+     * @expectedExceptionCode 3
+     */
+    public function testRespondToAccessTokenRequestMissingRedirectUri()
+    {
+        $clientRepositoryMock = $this->getMockBuilder(ClientRepositoryInterface::class)->getMock();
+        $userRepositoryMock = $this->getMockBuilder(UserRepositoryInterface::class)->getMock();
+        $accessTokenRepositoryMock = $this->getMockBuilder(AccessTokenRepositoryInterface::class)->getMock();
+        $refreshTokenRepositoryMock = $this->getMockBuilder(RefreshTokenRepositoryInterface::class)->getMock();
+
+        $grant = new AuthCodeGrant(
+            $this->getMock(AuthCodeRepositoryInterface::class),
+            $this->getMock(RefreshTokenRepositoryInterface::class),
+            $userRepositoryMock,
+            new \DateInterval('PT10M')
+        );
+        $grant->setClientRepository($clientRepositoryMock);
+        $grant->setAccessTokenRepository($accessTokenRepositoryMock);
+        $grant->setRefreshTokenRepository($refreshTokenRepositoryMock);
+        $grant->setPathToPublicKey('file://' . __DIR__ . '/../Utils/public.key');
+        $grant->setPathToPrivateKey('file://' . __DIR__ . '/../Utils/private.key');
+
+        $request = new ServerRequest(
+            [],
+            []
+            ,
+            null,
+            'POST',
+            'php://input',
+            [],
+            [],
+            [],
+            [
+                'grant_type' => 'authorization_code',
+            ]
+        );
+
+        /** @var StubResponseType $response */
+        $grant->respondToRequest($request, new StubResponseType(), new \DateInterval('PT10M'));
+    }
+
+    /**
+     * @expectedException \League\OAuth2\Server\Exception\OAuthServerException
+     * @expectedExceptionCode 3
+     */
+    public function testRespondToAccessTokenRequestMissingCode()
+    {
+        $client = new ClientEntity();
+        $client->setSecret('bar');
+        $client->setRedirectUri('http://foo/bar');
+        $clientRepositoryMock = $this->getMockBuilder(ClientRepositoryInterface::class)->getMock();
+        $clientRepositoryMock->method('getClientEntity')->willReturn($client);
+
+        $userRepositoryMock = $this->getMockBuilder(UserRepositoryInterface::class)->getMock();
+        $accessTokenRepositoryMock = $this->getMockBuilder(AccessTokenRepositoryInterface::class)->getMock();
+        $refreshTokenRepositoryMock = $this->getMockBuilder(RefreshTokenRepositoryInterface::class)->getMock();
+
+        $grant = new AuthCodeGrant(
+            $this->getMock(AuthCodeRepositoryInterface::class),
+            $this->getMock(RefreshTokenRepositoryInterface::class),
+            $userRepositoryMock,
+            new \DateInterval('PT10M')
+        );
+        $grant->setClientRepository($clientRepositoryMock);
+        $grant->setAccessTokenRepository($accessTokenRepositoryMock);
+        $grant->setRefreshTokenRepository($refreshTokenRepositoryMock);
+        $grant->setPathToPublicKey('file://' . __DIR__ . '/../Utils/public.key');
+        $grant->setPathToPrivateKey('file://' . __DIR__ . '/../Utils/private.key');
+
+        $request = new ServerRequest(
+            [],
+            []
+            ,
+            null,
+            'POST',
+            'php://input',
+            [],
+            [],
+            [],
+            [
+                'grant_type'    => 'authorization_code',
+                'client_id'     => 'foo',
+                'client_secret' => 'bar',
+                'redirect_uri'  => 'http://foo/bar',
+            ]
+        );
+
+        /** @var StubResponseType $response */
+        $grant->respondToRequest($request, new StubResponseType(), new \DateInterval('PT10M'));
+    }
+
+    public function testRespondToAccessTokenRequestExpiredCode()
+    {
+        $client = new ClientEntity();
+        $client->setIdentifier('foo');
+        $client->setRedirectUri('http://foo/bar');
+        $clientRepositoryMock = $this->getMockBuilder(ClientRepositoryInterface::class)->getMock();
+        $clientRepositoryMock->method('getClientEntity')->willReturn($client);
+
+        $userRepositoryMock = $this->getMockBuilder(UserRepositoryInterface::class)->getMock();
+        $userEntity = new UserEntity();
+        $userRepositoryMock->method('getUserEntityByUserCredentials')->willReturn($userEntity);
+
+        $accessTokenRepositoryMock = $this->getMockBuilder(AccessTokenRepositoryInterface::class)->getMock();
+        $accessTokenRepositoryMock->method('persistNewAccessToken')->willReturnSelf();
+
+        $refreshTokenRepositoryMock = $this->getMockBuilder(RefreshTokenRepositoryInterface::class)->getMock();
+        $refreshTokenRepositoryMock->method('persistNewRefreshToken')->willReturnSelf();
+
+        $grant = new AuthCodeGrant(
+            $this->getMock(AuthCodeRepositoryInterface::class),
+            $this->getMock(RefreshTokenRepositoryInterface::class),
+            $userRepositoryMock,
+            new \DateInterval('PT10M')
+        );
+        $grant->setClientRepository($clientRepositoryMock);
+        $grant->setAccessTokenRepository($accessTokenRepositoryMock);
+        $grant->setRefreshTokenRepository($refreshTokenRepositoryMock);
+        $grant->setPathToPublicKey('file://' . __DIR__ . '/../Utils/public.key');
+        $grant->setPathToPrivateKey('file://' . __DIR__ . '/../Utils/private.key');
+
+        $request = new ServerRequest(
+            [],
+            []
+            ,
+            null,
+            'POST',
+            'php://input',
+            [],
+            [],
+            [],
+            [
+                'grant_type'   => 'authorization_code',
+                'client_id'    => 'foo',
+                'redirect_uri' => 'http://foo/bar',
+                'code'         => KeyCrypt::encrypt(
+                    json_encode(
+                        [
+                            'auth_code_id' => uniqid(),
+                            'expire_time'  => time() - 3600,
+                            'client_id'    => 'foo',
+                            'user_id'      => 123,
+                            'scopes'       => ['foo'],
+                            'redirect_uri' => 'http://foo/bar',
+                        ]
+                    ),
+                    'file://' . __DIR__ . '/../Utils/private.key'
+                ),
+            ]
+        );
+
+        try {
+            /** @var StubResponseType $response */
+            $grant->respondToRequest($request, new StubResponseType(), new \DateInterval('PT10M'));
+        } catch (OAuthServerException $e) {
+            $this->assertEquals($e->getHint(), 'Authorization code has expired');
+        }
+    }
+
+    public function testRespondToAccessTokenRequestRevokedCode()
+    {
+        $client = new ClientEntity();
+        $client->setIdentifier('foo');
+        $client->setRedirectUri('http://foo/bar');
+        $clientRepositoryMock = $this->getMockBuilder(ClientRepositoryInterface::class)->getMock();
+        $clientRepositoryMock->method('getClientEntity')->willReturn($client);
+
+        $userRepositoryMock = $this->getMockBuilder(UserRepositoryInterface::class)->getMock();
+        $userEntity = new UserEntity();
+        $userRepositoryMock->method('getUserEntityByUserCredentials')->willReturn($userEntity);
+
+        $accessTokenRepositoryMock = $this->getMockBuilder(AccessTokenRepositoryInterface::class)->getMock();
+        $accessTokenRepositoryMock->method('persistNewAccessToken')->willReturnSelf();
+
+        $refreshTokenRepositoryMock = $this->getMockBuilder(RefreshTokenRepositoryInterface::class)->getMock();
+        $refreshTokenRepositoryMock->method('persistNewRefreshToken')->willReturnSelf();
+
+        $authCodeRepositoryMock = $this->getMockBuilder(AuthCodeRepositoryInterface::class)->getMock();
+        $authCodeRepositoryMock->method('isAuthCodeRevoked')->willReturn(true);
+
+        $grant = new AuthCodeGrant(
+            $authCodeRepositoryMock,
+            $this->getMock(RefreshTokenRepositoryInterface::class),
+            $userRepositoryMock,
+            new \DateInterval('PT10M')
+        );
+        $grant->setClientRepository($clientRepositoryMock);
+        $grant->setAccessTokenRepository($accessTokenRepositoryMock);
+        $grant->setRefreshTokenRepository($refreshTokenRepositoryMock);
+        $grant->setPathToPublicKey('file://' . __DIR__ . '/../Utils/public.key');
+        $grant->setPathToPrivateKey('file://' . __DIR__ . '/../Utils/private.key');
+
+        $request = new ServerRequest(
+            [],
+            []
+            ,
+            null,
+            'POST',
+            'php://input',
+            [],
+            [],
+            [],
+            [
+                'grant_type'   => 'authorization_code',
+                'client_id'    => 'foo',
+                'redirect_uri' => 'http://foo/bar',
+                'code'         => KeyCrypt::encrypt(
+                    json_encode(
+                        [
+                            'auth_code_id' => uniqid(),
+                            'expire_time'  => time() + 3600,
+                            'client_id'    => 'foo',
+                            'user_id'      => 123,
+                            'scopes'       => ['foo'],
+                            'redirect_uri' => 'http://foo/bar',
+                        ]
+                    ),
+                    'file://' . __DIR__ . '/../Utils/private.key'
+                ),
+            ]
+        );
+
+        try {
+            /** @var StubResponseType $response */
+            $grant->respondToRequest($request, new StubResponseType(), new \DateInterval('PT10M'));
+        } catch (OAuthServerException $e) {
+            $this->assertEquals($e->getHint(), 'Authorization code has been revoked');
+        }
+    }
+
+    public function testRespondToAccessTokenRequestClientMismatch()
+    {
+        $client = new ClientEntity();
+        $client->setIdentifier('foo');
+        $client->setRedirectUri('http://foo/bar');
+        $clientRepositoryMock = $this->getMockBuilder(ClientRepositoryInterface::class)->getMock();
+        $clientRepositoryMock->method('getClientEntity')->willReturn($client);
+
+        $userRepositoryMock = $this->getMockBuilder(UserRepositoryInterface::class)->getMock();
+        $userEntity = new UserEntity();
+        $userRepositoryMock->method('getUserEntityByUserCredentials')->willReturn($userEntity);
+
+        $accessTokenRepositoryMock = $this->getMockBuilder(AccessTokenRepositoryInterface::class)->getMock();
+        $accessTokenRepositoryMock->method('persistNewAccessToken')->willReturnSelf();
+
+        $refreshTokenRepositoryMock = $this->getMockBuilder(RefreshTokenRepositoryInterface::class)->getMock();
+        $refreshTokenRepositoryMock->method('persistNewRefreshToken')->willReturnSelf();
+
+        $grant = new AuthCodeGrant(
+            $this->getMock(AuthCodeRepositoryInterface::class),
+            $this->getMock(RefreshTokenRepositoryInterface::class),
+            $userRepositoryMock,
+            new \DateInterval('PT10M')
+        );
+        $grant->setClientRepository($clientRepositoryMock);
+        $grant->setAccessTokenRepository($accessTokenRepositoryMock);
+        $grant->setRefreshTokenRepository($refreshTokenRepositoryMock);
+        $grant->setPathToPublicKey('file://' . __DIR__ . '/../Utils/public.key');
+        $grant->setPathToPrivateKey('file://' . __DIR__ . '/../Utils/private.key');
+
+        $request = new ServerRequest(
+            [],
+            []
+            ,
+            null,
+            'POST',
+            'php://input',
+            [],
+            [],
+            [],
+            [
+                'grant_type'   => 'authorization_code',
+                'client_id'    => 'foo',
+                'redirect_uri' => 'http://foo/bar',
+                'code'         => KeyCrypt::encrypt(
+                    json_encode(
+                        [
+                            'auth_code_id' => uniqid(),
+                            'expire_time'  => time() + 3600,
+                            'client_id'    => 'bar',
+                            'user_id'      => 123,
+                            'scopes'       => ['foo'],
+                            'redirect_uri' => 'http://foo/bar',
+                        ]
+                    ),
+                    'file://' . __DIR__ . '/../Utils/private.key'
+                ),
+            ]
+        );
+
+        try {
+            /** @var StubResponseType $response */
+            $grant->respondToRequest($request, new StubResponseType(), new \DateInterval('PT10M'));
+        } catch (OAuthServerException $e) {
+            $this->assertEquals($e->getHint(), 'Authorization code was not issued to this client');
+        }
+    }
+
+    public function testRespondToAccessTokenRequestBadCodeEncryption()
+    {
+        $client = new ClientEntity();
+        $client->setIdentifier('foo');
+        $client->setRedirectUri('http://foo/bar');
+        $clientRepositoryMock = $this->getMockBuilder(ClientRepositoryInterface::class)->getMock();
+        $clientRepositoryMock->method('getClientEntity')->willReturn($client);
+
+        $userRepositoryMock = $this->getMockBuilder(UserRepositoryInterface::class)->getMock();
+        $userEntity = new UserEntity();
+        $userRepositoryMock->method('getUserEntityByUserCredentials')->willReturn($userEntity);
+
+        $accessTokenRepositoryMock = $this->getMockBuilder(AccessTokenRepositoryInterface::class)->getMock();
+        $accessTokenRepositoryMock->method('persistNewAccessToken')->willReturnSelf();
+
+        $refreshTokenRepositoryMock = $this->getMockBuilder(RefreshTokenRepositoryInterface::class)->getMock();
+        $refreshTokenRepositoryMock->method('persistNewRefreshToken')->willReturnSelf();
+
+        $grant = new AuthCodeGrant(
+            $this->getMock(AuthCodeRepositoryInterface::class),
+            $this->getMock(RefreshTokenRepositoryInterface::class),
+            $userRepositoryMock,
+            new \DateInterval('PT10M')
+        );
+        $grant->setClientRepository($clientRepositoryMock);
+        $grant->setAccessTokenRepository($accessTokenRepositoryMock);
+        $grant->setRefreshTokenRepository($refreshTokenRepositoryMock);
+        $grant->setPathToPublicKey('file://' . __DIR__ . '/../Utils/public.key');
+        $grant->setPathToPrivateKey('file://' . __DIR__ . '/../Utils/private.key');
+
+        $request = new ServerRequest(
+            [],
+            []
+            ,
+            null,
+            'POST',
+            'php://input',
+            [],
+            [],
+            [],
+            [
+                'grant_type'   => 'authorization_code',
+                'client_id'    => 'foo',
+                'redirect_uri' => 'http://foo/bar',
+                'code'         => 'sdfsfsd',
+            ]
+        );
+
+        try {
+            /** @var StubResponseType $response */
+            $grant->respondToRequest($request, new StubResponseType(), new \DateInterval('PT10M'));
+        } catch (OAuthServerException $e) {
+            $this->assertEquals($e->getHint(), 'Cannot decrypt the authorization code');
+        }
+    }
 }