Add occ command to dump metadata for a given provider

Signed-off-by: Maxime Besson <maxime.besson@worteks.com>

appinfo/info.xml

@@ -35,6 +35,9 @@ While theoretically any other authentication provider implementing either one of
 	<dependencies>
 		<nextcloud min-version="18" max-version="20" />
 	</dependencies>
+	<commands>
+		<command>OCA\User_SAML\Command\GetMetadata</command>
+	</commands>
 	<settings>
 		<admin>OCA\User_SAML\Settings\Admin</admin>
 		<admin-section>OCA\User_SAML\Settings\Section</admin-section>

lib/Command/GetMetadata.php

@@ -0,0 +1,83 @@
+<?php
+/**
+ * @copyright Copyright (c) 2020 Maxime Besson <maxime.besson@worteks.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\User_SAML\Command;
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use OCA\User_SAML\SAMLSettings;
+use OneLogin\Saml2\Settings;
+
+class GetMetadata extends Command {
+
+	/** @var SAMLSettings */
+	private $SAMLSettings;
+
+	public function __construct(
+		SAMLSettings $SAMLSettings
+	) {
+		parent::__construct();
+		$this->SAMLSettings = $SAMLSettings;
+	}
+
+	protected function configure() {
+		$this
+			->setName('saml:metadata')
+			->setDescription('Get SAML Metadata')
+			->setHelp(<<<EOT
+This command prints out the Nextcloud SAML Metadata for this provider.
+
+It may require setting overwrite.cli.url and htaccess.IgnoreFrontController to
+generate the correct URLs and entityID
+EOT
+		)
+
+			->addArgument(
+				'idp',
+				InputArgument::OPTIONAL,
+				'ID of the IDP you want metadata for',
+				'1'
+			)
+		;
+	}
+
+	/**
+	 * @param InputInterface $input
+	 * @param OutputInterface $output
+	 * @return void
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output) {
+		$idp = $input->getArgument('idp');
+		$settings = new Settings($this->SAMLSettings->getOneLoginSettingsArray($idp));
+		$metadata = $settings->getSPMetadata();
+		$errors = $settings->validateMetadata($metadata);
+		if (empty($errors)) {
+			$output->writeln($metadata);
+		} else {
+			throw new Error(
+				'Invalid SP metadata: '.implode(', ', $errors),
+				Error::METADATA_SP_INVALID
+			);
+		}
+	}
+}

tests/unit/Command/GetMetadataTest.php

@@ -0,0 +1,102 @@
+<?php
+/**
+ * @copyright Copyright (c) 2020 Maxime Besson <maxime.besson@worteks.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\User_SAML\Tests\Command;
+
+use OCA\User_SAML\Command\GetMetadata;
+use OCA\User_SAML\SAMLSettings;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use OCP\IConfig;
+use OCP\IRequest;
+use OCP\ISession;
+use OCP\IURLGenerator;
+
+
+class GetMetadataTest extends \Test\TestCase {
+
+    /** @var GetMetadata|\PHPUnit_Framework_MockObject_MockObject*/
+    protected $GetMetadata;
+    /** @var IRequest|\PHPUnit_Framework_MockObject_MockObject */
+    private $request;
+    /** @var ISession|\PHPUnit_Framework_MockObject_MockObject */
+    private $session;
+    /** @var SAMLSettings|\PHPUnit_Framework_MockObject_MockObject*/
+    private $samlSettings;
+    /** @var IConfig|\PHPUnit_Framework_MockObject_MockObject */
+    private $config;
+    /** @var IURLGenerator|\PHPUnit_Framework_MockObject_MockObject */
+    private $urlGenerator;
+
+
+    protected function setUp(): void {
+        $this->urlGenerator = $this->createMock(IURLGenerator::class);
+        $this->config = $this->createMock(IConfig::class);
+        $this->request = $this->createMock(IRequest::class);
+        $this->session = $this->createMock(ISession::class);
+
+        $this->samlSettings = new SAMLSettings($this->urlGenerator,
+                                $this->config,
+                                $this->request,
+                                $this->session);
+        $this->GetMetadata = new GetMetadata($this->samlSettings);
+
+        parent::setUp();
+    }
+
+    public function testGetMetadata(){
+          $inputInterface = $this->createMock(InputInterface::class);
+          $outputInterface = $this->createMock(OutputInterface::class);
+          $this->urlGenerator
+            ->expects($this->at(0))
+            ->method('linkToRouteAbsolute')
+            ->with('user_saml.SAML.base')
+            ->willReturn('https://nextcloud.com/base/');
+          $this->urlGenerator
+            ->expects($this->at(1))
+            ->method('linkToRouteAbsolute')
+            ->with('user_saml.SAML.getMetadata')
+            ->willReturn('https://nextcloud.com/metadata/');
+          $this->urlGenerator
+            ->expects($this->at(2))
+            ->method('linkToRouteAbsolute')
+            ->with('user_saml.SAML.assertionConsumerService')
+            ->willReturn('https://nextcloud.com/acs/');
+          $this->config->expects($this->any())->method('getAppValue')
+             ->willReturnCallback(function($app, $key, $default) {
+                 if ($key == 'idp-entityId') {
+                     return "dummy";
+                 }
+                 if ($key == 'idp-singleSignOnService.url') {
+                     return "https://example.com/sso";
+                 }
+                 if ($key == 'idp-x509cert') {
+                     return "DUMMY CERTIFICATE";
+                 }
+                 return $default;
+             });
+
+          $outputInterface->expects($this->once())->method('writeln')
+              ->with($this->stringContains('md:EntityDescriptor'));
+
+          $this->invokePrivate($this->GetMetadata, 'execute', [$inputInterface, $outputInterface]);
+    }
+}