fix(auth): Keep redirect URL during 2FA setup and challenge

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

[skip ci]

core/Controller/TwoFactorChallengeController.php

 		$data = [
 			'providers' => $setupProviders,
 			'logout_url' => $this->getLogoutUrl(),
+			'redirect_url' => $redirect_url,
 		];
 
 		return new StandaloneTemplateResponse($this->appName, 'twofactorsetupselection', $data, 'guest');
 		$data = [
 			'provider' => $provider,
 			'logout_url' => $this->getLogoutUrl(),
+			'redirect_url' => $redirect_url,
 			'template' => $tmpl->fetchPage(),
 		];
 		$response = new StandaloneTemplateResponse($this->appName, 'twofactorsetupchallenge', $data, 'guest');
 			'core.TwoFactorChallenge.showChallenge',
 			[
 				'challengeProviderId' => $providerId,
+				'redirect_url' => $redirect_url,
 			]
 		));
 	}

core/Middleware/TwoFactorMiddleware.php

 
 	public function afterException($controller, $methodName, Exception $exception) {
 		if ($exception instanceof TwoFactorAuthRequiredException) {
-			$params = [];
-			if (isset($this->request->server['REQUEST_URI'])) {
+			$params = [
+				'redirect_url' => $this->request->getParam('redirect_url'),
+			];
+			if (!isset($params['redirect_url']) && isset($this->request->server['REQUEST_URI'])) {
 				$params['redirect_url'] = $this->request->server['REQUEST_URI'];
 			}
 			return new RedirectResponse($this->urlGenerator->linkToRoute('core.TwoFactorChallenge.selectChallenge', $params));

core/templates/twofactorsetupselection.php

 			   href="<?php p(\OC::$server->getURLGenerator()->linkToRoute('core.TwoFactorChallenge.setupProvider',
 			   	[
 			   		'providerId' => $provider->getId(),
+			   		'redirect_url' => $_['redirect_url'],
 			   	]
 			   )) ?>">
 				<?php

tests/Core/Controller/TwoFactorChallengeControllerTest.php

 		$this->assertEquals($expected, $this->controller->solveChallenge('myprovider', 'token', '/url'));
 	}
 
-	public function testSetUpProviders() {
+	public function testSetUpProviders(): void {
 		$user = $this->createMock(IUser::class);
 		$this->userSession->expects($this->once())
 			->method('getUser')
 					$provider,
 				],
 				'logout_url' => 'logoutAttribute',
+				'redirect_url' => null,
 			],
 			'guest'
 		);
 		$this->assertEquals($expected, $response);
 	}
 
-	public function testSetUpProvider() {
+	public function testSetUpProvider(): void {
 		$user = $this->createMock(IUser::class);
 		$this->userSession->expects($this->once())
 			->method('getUser')
 				'provider' => $provider,
 				'logout_url' => 'logoutAttribute',
 				'template' => 'tmpl',
+				'redirect_url' => null,
 			],
 			'guest'
 		);
 		$this->assertEquals($expected, $response);
 	}
 
-	public function testConfirmProviderSetup() {
+	public function testConfirmProviderSetup(): void {
 		$this->urlGenerator->expects($this->once())
 			->method('linkToRoute')
 			->with(
 				'core.TwoFactorChallenge.showChallenge',
 				[
 					'challengeProviderId' => 'totp',
+					'redirect_url' => null,
 				])
 			->willReturn('2fa/select/page');
 		$expected = new RedirectResponse('2fa/select/page');