Add "Global Auth" option to external storage

This adds the "Global Auth" option to the external storage implementation, it is basically done by reverting c2c6caee93c491de9fa9a2e7c2eea036f4974e61 from https://github.com/owncloud/core/pull/22468.

This was taken from owncloud/core which is AGPL licensed. Commited with "icewind@owncloud.com" to keep the license header signature in sync.

![2016-06-21_14-01-06](https://cloud.githubusercontent.com/assets/878997/16228662/9c243136-37b8-11e6-9700-c1076ddb3d17.png)

9 files changed, 282 insertions, 3 deletions

diff --git a/apps/files_external/appinfo/routes.php b/apps/files_external/appinfo/routes.php
index 68924ba2c6b..1062ae524ff 100644
--- a/apps/files_external/appinfo/routes.php
+++ b/apps/files_external/appinfo/routes.php
@@ -42,7 +42,12 @@
 				'url' => '/ajax/public_key.php',
 				'verb' => 'POST',
 				'requirements' => array()
-			)
+			),
+			[
+				'name' => 'Ajax#saveGlobalCredentials',
+				'url' => '/globalcredentials',
+				'verb' => 'POST',
+			],
 		)
 	)
 );
diff --git a/apps/files_external/js/settings.js b/apps/files_external/js/settings.js
index d210c158ec1..921bf92e775 100644
--- a/apps/files_external/js/settings.js
+++ b/apps/files_external/js/settings.js
@@ -1347,6 +1347,33 @@ $(document).ready(function() {
 		}
 	});
 
+	$('#global_credentials').on('submit', function() {
+		var $form = $(this);
+		var uid = $form.find('[name=uid]').val();
+		var user = $form.find('[name=username]').val();
+		var password = $form.find('[name=password]').val();
+		var $submit = $form.find('[type=submit]');
+		$submit.val(t('files_external', 'Saving...'));
+		$.ajax({
+			type: 'POST',
+			contentType: 'application/json',
+			data: JSON.stringify({
+					uid: uid,
+					user: user,
+				password: password
+			}),
+				url: OC.generateUrl('apps/files_external/globalcredentials'),
+				dataType: 'json',
+			success: function() {
+				$submit.val(t('files_external', 'Saved'));
+				setTimeout(function(){
+					$submit.val(t('files_external', 'Save'));
+				}, 2500);
+			}
+		});
+		return false;
+	});
+
 	// global instance
 	OCA.External.Settings.mountConfig = mountConfigListView;
 
diff --git a/apps/files_external/lib/AppInfo/Application.php b/apps/files_external/lib/AppInfo/Application.php
index f78411038fa..ee773d03d8c 100644
--- a/apps/files_external/lib/AppInfo/Application.php
+++ b/apps/files_external/lib/AppInfo/Application.php
@@ -112,6 +112,7 @@ class Application extends App implements IBackendProvider, IAuthMechanismProvide
 			// AuthMechanism::SCHEME_PASSWORD mechanisms
 			$container->query('OCA\Files_External\Lib\Auth\Password\Password'),
 			$container->query('OCA\Files_External\Lib\Auth\Password\SessionCredentials'),
+			$container->query('OCA\Files_External\Lib\Auth\Password\GlobalAuth'),
 
 			// AuthMechanism::SCHEME_OAUTH1 mechanisms
 			$container->query('OCA\Files_External\Lib\Auth\OAuth1\OAuth1'),
diff --git a/apps/files_external/lib/Controller/AjaxController.php b/apps/files_external/lib/Controller/AjaxController.php
index c3df3fa8522..8dcfb2a47eb 100644
--- a/apps/files_external/lib/Controller/AjaxController.php
+++ b/apps/files_external/lib/Controller/AjaxController.php
@@ -24,6 +24,7 @@
 
 namespace OCA\Files_External\Controller;
 
+use OCA\Files_External\Lib\Auth\Password\GlobalAuth;
 use OCP\AppFramework\Controller;
 use OCP\IRequest;
 use OCP\AppFramework\Http\JSONResponse;
@@ -32,10 +33,16 @@ use OCA\Files_External\Lib\Auth\PublicKey\RSA;
 class AjaxController extends Controller {
 	/** @var RSA */
 	private $rsaMechanism;
+	/** @var GlobalAuth  */
+	private $globalAuth;
 
-	public function __construct($appName, IRequest $request, RSA $rsaMechanism) {
+	public function __construct($appName,
+								IRequest $request,
+								RSA $rsaMechanism,
+								GlobalAuth $globalAuth) {
 		parent::__construct($appName, $request);
 		$this->rsaMechanism = $rsaMechanism;
+		$this->globalAuth = $globalAuth;
 	}
 
 	private function generateSshKeys() {
@@ -61,4 +68,15 @@ class AjaxController extends Controller {
 			'status' => 'success'
 		));
 	}
+
+	/**
+	 * @param string $uid
+	 * @param string $user
+	 * @param string $password
+	 * @return bool
+	 */
+	public function saveGlobalCredentials($uid, $user, $password) {
+		$this->globalAuth->saveAuth($uid, $user, $password);
+		return true;
+	}
 }
diff --git a/apps/files_external/lib/Lib/Auth/Password/GlobalAuth.php b/apps/files_external/lib/Lib/Auth/Password/GlobalAuth.php
new file mode 100644
index 00000000000..5fa4dc5d1d4
--- /dev/null
+++ b/apps/files_external/lib/Lib/Auth/Password/GlobalAuth.php
@@ -0,0 +1,88 @@
+<?php
+/**
+ * @author Robin Appelman <icewind@owncloud.com>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\Files_External\Lib\Auth\Password;
+
+use OCA\Files_External\Service\BackendService;
+use OCP\IL10N;
+use OCP\IUser;
+use OCA\Files_External\Lib\Auth\AuthMechanism;
+use OCA\Files_External\Lib\StorageConfig;
+use OCP\Security\ICredentialsManager;
+use OCP\Files\Storage;
+use OCA\Files_External\Lib\InsufficientDataForMeaningfulAnswerException;
+
+/**
+ * Global Username and Password
+ */
+class GlobalAuth extends AuthMechanism {
+
+	const CREDENTIALS_IDENTIFIER = 'password::global';
+
+	/** @var ICredentialsManager */
+	protected $credentialsManager;
+
+	public function __construct(IL10N $l, ICredentialsManager $credentialsManager) {
+		$this->credentialsManager = $credentialsManager;
+
+		$this
+			->setIdentifier('password::global')
+			->setVisibility(BackendService::VISIBILITY_DEFAULT)
+			->setScheme(self::SCHEME_PASSWORD)
+			->setText($l->t('Global Credentials'));
+	}
+
+	public function getAuth($uid) {
+		$auth = $this->credentialsManager->retrieve($uid, self::CREDENTIALS_IDENTIFIER);
+		if (!is_array($auth)) {
+			return [
+				'user' => '',
+				'password' => ''
+			];
+		} else {
+			return $auth;
+		}
+	}
+
+	public function saveAuth($uid, $user, $password) {
+		$this->credentialsManager->store($uid, self::CREDENTIALS_IDENTIFIER, [
+			'user' => $user,
+			'password' => $password
+		]);
+	}
+
+	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+		if ($storage->getType() === StorageConfig::MOUNT_TYPE_ADMIN) {
+			$uid = '';
+		} elseif (is_null($user)) {
+			throw new InsufficientDataForMeaningfulAnswerException('No credentials saved');
+		} else {
+			$uid = $user->getUID();
+		}
+		$credentials = $this->credentialsManager->retrieve($uid, self::CREDENTIALS_IDENTIFIER);
+
+		if (is_array($credentials)) {
+			$storage->setBackendOption('user', $credentials['user']);
+			$storage->setBackendOption('password', $credentials['password']);
+		}
+	}
+
+}
diff --git a/apps/files_external/personal.php b/apps/files_external/personal.php
index 195b826a4c2..8c289f8e30f 100644
--- a/apps/files_external/personal.php
+++ b/apps/files_external/personal.php
@@ -30,6 +30,7 @@ use \OCA\Files_External\Service\BackendService;
 $appContainer = \OC_Mount_Config::$app->getContainer();
 $backendService = $appContainer->query('OCA\Files_External\Service\BackendService');
 $userStoragesService = $appContainer->query('OCA\Files_External\Service\UserStoragesService');
+$globalAuth = $appContainer->query('OCA\Files_External\Lib\Auth\Password\GlobalAuth');
 
 $tmpl = new OCP\Template('files_external', 'settings');
 $tmpl->assign('encryptionEnabled', \OC::$server->getEncryptionManager()->isEnabled());
@@ -38,5 +39,8 @@ $tmpl->assign('storages', $userStoragesService->getStorages());
 $tmpl->assign('dependencies', OC_Mount_Config::dependencyMessage($backendService->getBackends()));
 $tmpl->assign('backends', $backendService->getAvailableBackends());
 $tmpl->assign('authMechanisms', $backendService->getAuthMechanisms());
+$uid = \OC::$server->getUserSession()->getUser()->getUID();
+$tmpl->assign('globalCredentials', $globalAuth->getAuth($uid));
+$tmpl->assign('globalCredentialsUid', $uid);
 $tmpl->assign('allowUserMounting', $backendService->isUserMountingAllowed());
 return $tmpl->fetchPage();
diff --git a/apps/files_external/settings.php b/apps/files_external/settings.php
index dda715d7f3e..e2c70062bf3 100644
--- a/apps/files_external/settings.php
+++ b/apps/files_external/settings.php
@@ -32,6 +32,7 @@ use \OCA\Files_External\Service\BackendService;
 $appContainer = \OC_Mount_Config::$app->getContainer();
 $backendService = $appContainer->query('OCA\Files_External\Service\BackendService');
 $globalStoragesService = $appContainer->query('OCA\Files_External\Service\GlobalStoragesService');
+$globalAuth = $appContainer->query('OCA\Files_External\Lib\Auth\Password\GlobalAuth');
 
 \OC_Util::addVendorScript('select2/select2');
 \OC_Util::addVendorStyle('select2/select2');
@@ -44,4 +45,6 @@ $tmpl->assign('backends', $backendService->getAvailableBackends());
 $tmpl->assign('authMechanisms', $backendService->getAuthMechanisms());
 $tmpl->assign('dependencies', OC_Mount_Config::dependencyMessage($backendService->getBackends()));
 $tmpl->assign('allowUserMounting', $backendService->isUserMountingAllowed());
+$tmpl->assign('globalCredentials', $globalAuth->getAuth(''));
+$tmpl->assign('globalCredentialsUid', '');
 return $tmpl->fetchPage();
diff --git a/apps/files_external/templates/settings.php b/apps/files_external/templates/settings.php
index 6662f637039..6fb2a018547 100644
--- a/apps/files_external/templates/settings.php
+++ b/apps/files_external/templates/settings.php
@@ -84,8 +84,24 @@
 		}
 	}
 ?>
-<form id="files_external" class="section" data-encryption-enabled="<?php echo $_['encryptionEnabled']?'true': 'false'; ?>">
+<form autocomplete="false" class="section" action="#"
+	  id="global_credentials">
 	<h2><?php p($l->t('External Storage')); ?></h2>
+	<p><?php p($l->t('Global Credentials')); ?></p>
+	<input type="text" name="username"
+		autocomplete="false"
+		value="<?php p($_['globalCredentials']['user']); ?>"
+		placeholder="<?php p($l->t('Username')) ?>"/>
+	<input type="password" name="password"
+		autocomplete="false"
+		value="<?php p($_['globalCredentials']['password']); ?>"
+		placeholder="<?php p($l->t('Password')) ?>"/>
+	<input type="hidden" name="uid"
+		value="<?php p($_['globalCredentialsUid']); ?>"/>
+		<input type="submit" value="<?php p($l->t('Save')) ?>"/>
+</form>
+
+<form id="files_external" class="section" data-encryption-enabled="<?php echo $_['encryptionEnabled']?'true': 'false'; ?>">
 	<?php if (isset($_['dependencies']) and ($_['dependencies']<>'')) print_unescaped(''.$_['dependencies'].''); ?>
 	<table id="externalStorage" class="grid" data-admin='<?php print_unescaped(json_encode($_['visibilityType'] === BackendService::VISIBILITY_ADMIN)); ?>'>
 		<thead>
diff --git a/apps/files_external/tests/Auth/Password/GlobalAuth.php b/apps/files_external/tests/Auth/Password/GlobalAuth.php
new file mode 100644
index 00000000000..912bfd1574d
--- /dev/null
+++ b/apps/files_external/tests/Auth/Password/GlobalAuth.php
@@ -0,0 +1,117 @@
+<?php
+/**
+ * @author Robin Appelman <icewind@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\Files_External\Tests\Auth\Password;
+
+use OCA\Files_External\Lib\Auth\Password\GlobalAuth;
+use OCA\Files_external\Lib\StorageConfig;
+use Test\TestCase;
+
+class GlobalAuthTest extends TestCase {
+	/**
+	 * @var \OCP\IL10N|\PHPUnit_Framework_MockObject_MockObject
+	 */
+	private $l10n;
+
+	/**
+	 * @var \OCP\Security\ICredentialsManager|\PHPUnit_Framework_MockObject_MockObject
+	 */
+	private $credentialsManager;
+
+	/**
+	 * @var GlobalAuth
+	 */
+	private $instance;
+
+	protected function setUp() {
+		parent::setUp();
+		$this->l10n = $this->getMock('\OCP\IL10N');
+		$this->credentialsManager = $this->getMock('\OCP\Security\ICredentialsManager');
+		$this->instance = new GlobalAuth($this->l10n, $this->credentialsManager);
+	}
+
+	private function getStorageConfig($type, $config = []) {
+		/** @var \OCA\Files_External\Lib\StorageConfig|\PHPUnit_Framework_MockObject_MockObject $storageConfig */
+		$storageConfig = $this->getMock('\OCA\Files_External\Lib\StorageConfig');
+		$storageConfig->expects($this->any())
+			->method('getType')
+			->will($this->returnValue($type));
+		$storageConfig->expects($this->any())
+			->method('getBackendOptions')
+			->will($this->returnCallback(function () use (&$config) {
+				return $config;
+			}));
+		$storageConfig->expects($this->any())
+			->method('getBackendOption')
+			->will($this->returnCallback(function ($key) use (&$config) {
+				return $config[$key];
+			}));
+		$storageConfig->expects($this->any())
+			->method('setBackendOption')
+			->will($this->returnCallback(function ($key, $value) use (&$config) {
+				$config[$key] = $value;
+			}));
+
+		return $storageConfig;
+	}
+
+	public function testNoCredentials() {
+		$this->credentialsManager->expects($this->once())
+			->method('retrieve')
+			->will($this->returnValue(null));
+
+		$storage = $this->getStorageConfig(StorageConfig::MOUNT_TYPE_ADMIN);
+
+		$this->instance->manipulateStorageConfig($storage);
+		$this->assertEquals([], $storage->getBackendOptions());
+	}
+
+	public function testSavedCredentials() {
+		$this->credentialsManager->expects($this->once())
+			->method('retrieve')
+			->will($this->returnValue([
+				'user' => 'a',
+				'password' => 'b'
+			]));
+
+		$storage = $this->getStorageConfig(StorageConfig::MOUNT_TYPE_ADMIN);
+
+		$this->instance->manipulateStorageConfig($storage);
+		$this->assertEquals([
+			'user' => 'a',
+			'password' => 'b'
+		], $storage->getBackendOptions());
+	}
+
+	/**
+	 * @expectedException \OCA\Files_External\Lib\InsufficientDataForMeaningfulAnswerException
+	 */
+	public function testNoCredentialsPersonal() {
+		$this->credentialsManager->expects($this->never())
+			->method('retrieve');
+
+		$storage = $this->getStorageConfig(StorageConfig::MOUNT_TYPE_PERSONAl);
+
+		$this->instance->manipulateStorageConfig($storage);
+		$this->assertEquals([], $storage->getBackendOptions());
+	}
+
+}