add cloud federation api app

Signed-off-by: Bjoern Schiessle <bjoern@schiessle.org>

9 files changed, 1152 insertions, 0 deletions

diff --git a/apps/cloud_federation_api/LICENSE b/apps/cloud_federation_api/LICENSE
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+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    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/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<http://www.gnu.org/licenses/>.
diff --git a/apps/cloud_federation_api/Makefile b/apps/cloud_federation_api/Makefile
new file mode 100644
index 00000000000..bfaffcb4b11
--- /dev/null
+++ b/apps/cloud_federation_api/Makefile
@@ -0,0 +1,50 @@
+app_name=end_to_end_encryption
+
+project_dir=$(CURDIR)/../$(app_name)
+build_dir=$(CURDIR)/build/artifacts
+appstore_dir=$(build_dir)/appstore
+source_dir=$(build_dir)/source
+sign_dir=$(build_dir)/sign
+package_name=$(app_name)
+cert_dir=$(HOME)/.nextcloud/certificates
+version+=1.0.1
+
+all: appstore
+
+release: appstore create-tag
+
+create-tag:
+	git tag -s -a v$(version) -m "Tagging the $(version) release."
+	git push origin v$(version)
+
+clean:
+	rm -rf $(build_dir)
+	rm -rf node_modules
+
+appstore: clean
+	mkdir -p $(sign_dir)
+	rsync -a \
+	--exclude=/build \
+	--exclude=/docs \
+	--exclude=/l10n/templates \
+	--exclude=/l10n/.tx \
+	--exclude=/tests \
+	--exclude=/.git \
+	--exclude=/.github \
+	--exclude=/l10n/l10n.pl \
+	--exclude=/CONTRIBUTING.md \
+	--exclude=/issue_template.md \
+	--exclude=/README.md \
+	--exclude=/.gitattributes \
+	--exclude=/.gitignore \
+	--exclude=/.scrutinizer.yml \
+	--exclude=/.drone.yml \
+	--exclude=/.travis.yml \
+	--exclude=/Makefile \
+	$(project_dir)/ $(sign_dir)/$(app_name)
+	tar -czf $(build_dir)/$(app_name)-$(version).tar.gz \
+		-C $(sign_dir) $(app_name)
+	@if [ -f $(cert_dir)/$(app_name).key ]; then \
+		echo "Signing package…"; \
+		openssl dgst -sha512 -sign $(cert_dir)/$(app_name).key $(build_dir)/$(app_name)-$(version).tar.gz | openssl base64; \
+	fi
diff --git a/apps/cloud_federation_api/README.md b/apps/cloud_federation_api/README.md
new file mode 100644
index 00000000000..34b5045eaf9
--- /dev/null
+++ b/apps/cloud_federation_api/README.md
@@ -0,0 +1,2 @@
+# cloud_federation_api
+The cloud federation API allows to share information like files, contacts, calendars, incoming calls, etc accross Nextcloud instances
diff --git a/apps/cloud_federation_api/appinfo/app.php b/apps/cloud_federation_api/appinfo/app.php
new file mode 100644
index 00000000000..9b79832d817
--- /dev/null
+++ b/apps/cloud_federation_api/appinfo/app.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ * @copyright Copyright (c) 2018 Bjoern Schiessle <bjoern@schiessle.org>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+$app = new \OCA\CloudFederationAPI\AppInfo\Application();
diff --git a/apps/cloud_federation_api/appinfo/info.xml b/apps/cloud_federation_api/appinfo/info.xml
new file mode 100644
index 00000000000..c733d26c0dc
--- /dev/null
+++ b/apps/cloud_federation_api/appinfo/info.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<info xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance"
+      xsi:noNamespaceSchemaLocation="https://apps.nextcloud.com/schema/apps/info.xsd">
+    <id>cloud_federation_api</id>
+    <name>Cloud Federation API</name>
+    <summary>Enable clouds to communicate with each other and exchange data</summary>
+    <description>The Coud Federation API enabled various Nextcloud instances to communitcate with each other and to exchange data</description>
+    <version>0.0.1</version>
+    <licence>agpl</licence>
+    <author>Bjoern Schiessle</author>
+    <namespace>CloudFederationAPI</namespace>
+    <types>
+        <filesystem/>
+    </types>
+    <category>files</category>
+    <bugs>https://github.com/nextcloud/cloud_federation/issues</bugs>
+    <dependencies>
+        <nextcloud min-version="14" max-version="14"/>
+    </dependencies>
+</info>
diff --git a/apps/cloud_federation_api/lib/AppInfo/Application.php b/apps/cloud_federation_api/lib/AppInfo/Application.php
new file mode 100644
index 00000000000..3ea3037d12a
--- /dev/null
+++ b/apps/cloud_federation_api/lib/AppInfo/Application.php
@@ -0,0 +1,37 @@
+<?php
+/**
+ * @copyright Copyright (c) 2018 Bjoern Schiessle <bjoern@schiessle.org>
+ *
+ * @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\CloudFederationAPI\AppInfo;
+
+
+use OCA\CloudFederationAPI\Capabilities;
+use OCP\AppFramework\App;
+
+class Application extends App {
+
+	public function __construct() {
+		parent::__construct('cloud_federation_api');
+
+		$container = $this->getContainer();
+		$container->registerCapability(Capabilities::class);
+	}
+}
diff --git a/apps/cloud_federation_api/lib/Capabilities.php b/apps/cloud_federation_api/lib/Capabilities.php
new file mode 100644
index 00000000000..17d3b2cfaf3
--- /dev/null
+++ b/apps/cloud_federation_api/lib/Capabilities.php
@@ -0,0 +1,56 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Bjoern Schiessle <bjoern@schiessle.org>
+ *
+ * @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\CloudFederationAPI;
+
+
+use OCP\Capabilities\ICapability;
+use OCP\IURLGenerator;
+
+class Capabilities implements ICapability {
+
+	/** @var IURLGenerator */
+	private $urlGenerator;
+
+	public function __construct(IURLGenerator $urlGenerator) {
+		$this->urlGenerator = $urlGenerator;
+	}
+
+	/**
+	 * Function an app uses to return the capabilities
+	 *
+	 * @return array Array containing the apps capabilities
+	 * @since 8.2.0
+	 */
+	public function getCapabilities() {
+		$url = $this->urlGenerator->linkToRouteAbsolute('cloud_federation_api.requesthandlercontroller.addShare');
+		$capabilities = ['ocm' =>
+			[
+				'enabled' => true,
+				'api-version' => '2.0-draft',
+				'end-point' => substr($url, 0, strrpos($url, '/')),
+			]
+		];
+
+		return $capabilities;
+	}
+}
diff --git a/apps/cloud_federation_api/lib/Config.php b/apps/cloud_federation_api/lib/Config.php
new file mode 100644
index 00000000000..90c36a4f792
--- /dev/null
+++ b/apps/cloud_federation_api/lib/Config.php
@@ -0,0 +1,46 @@
+<?php
+/**
+ * @copyright Copyright (c) 2018 Bjoern Schiessle <bjoern@schiessle.org>
+ *
+ * @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\CloudFederationAPI;
+
+
+/**
+ * Class config
+ *
+ * handles all the config parameters
+ *
+ * @package OCA\CloudFederationAPI
+ */
+class Config {
+
+	public function __construct() {
+	}
+
+	public function incomingRequestsEnabled() {
+		return true;
+	}
+
+	public function outgoingRequestsEnabled() {
+		return true;
+	}
+
+}
diff --git a/apps/cloud_federation_api/lib/Controller/RequestHandlerController.php b/apps/cloud_federation_api/lib/Controller/RequestHandlerController.php
new file mode 100644
index 00000000000..d551f464c22
--- /dev/null
+++ b/apps/cloud_federation_api/lib/Controller/RequestHandlerController.php
@@ -0,0 +1,258 @@
+<?php
+/**
+ * @copyright Copyright (c) 2018 Bjoern Schiessle <bjoern@schiessle.org>
+ *
+ * @author Bjoern Schiessle <bjoern@schiessle.org>
+ *
+ * @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\CloudFederationAPI\Controller;
+
+use OCA\CloudFederationAPI\Config;
+use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http;
+use OCP\AppFramework\Http\JSONResponse;
+use OCP\Federation\Exceptions\ProviderCouldNotAddShareException;
+use OCP\Federation\Exceptions\ShareNotFoundException;
+use OCP\Federation\ICloudFederationFactory;
+use OCP\Federation\ICloudFederationProviderManager;
+use OCP\Federation\Exceptions\ProviderDoesNotExistsException;
+use OCP\ILogger;
+use OCP\IRequest;
+use OCP\IURLGenerator;
+use OCP\IUserManager;
+
+
+/**
+ * Class RequestHandlerController
+ *
+ * handle API between different Cloud instances
+ *
+ * @package OCA\CloudFederationAPI\Controller
+ */
+class RequestHandlerController extends Controller {
+
+	/** @var ILogger */
+	private $logger;
+
+	/** @var IUserManager */
+	private $userManager;
+
+	/** @var IURLGenerator */
+	private $urlGenerator;
+
+	/** @var ICloudFederationProviderManager */
+	private $cloudFederationProviderManager;
+
+	/** @var Config */
+	private $config;
+
+	/** @var ICloudFederationFactory */
+	private $factory;
+
+	public function __construct($appName,
+								IRequest $request,
+								ILogger $logger,
+								IUserManager $userManager,
+								IURLGenerator $urlGenerator,
+								ICloudFederationProviderManager $cloudFederationProviderManager,
+								Config $config,
+								ICloudFederationFactory $factory
+	) {
+		parent::__construct($appName, $request);
+
+		$this->logger = $logger;
+		$this->userManager = $userManager;
+		$this->urlGenerator = $urlGenerator;
+		$this->cloudFederationProviderManager = $cloudFederationProviderManager;
+		$this->config = $config;
+		$this->factory = $factory;
+	}
+
+	/**
+	 * add share
+	 *
+	 * @NoCSRFRequired
+	 * @PublicPage
+	 * @BruteForceProtection(action=receiveFederatedShare)
+	 *
+	 * @param string $shareWith
+	 * @param string $name resource name (e.g. document.odt)
+	 * @param string $description share description (optional)
+	 * @param string $providerId resource UID on the provider side
+	 * @param string $owner provider specific UID of the user who owns the resource
+	 * @param string $ownerDisplayName display name of the user who shared the item
+	 * @param string $sharedBy provider specific UID of the user who shared the resource
+	 * @param $sharedByDisplayName display name of the user who shared the resource
+	 * @param array $protocol (e,.g. ['name' => 'webdav', 'options' => ['username' => 'john', 'permissions' => 31]])
+	 * @param string $shareType ('group' or 'user' share)
+	 * @param $resourceType ('file', 'calendar',...)
+	 * @return Http\DataResponse|JSONResponse
+	 *
+	 * Example: curl -H "Content-Type: application/json" -X POST -d '{"shareWith":"admin1","name":"welcome server2.txt","description":"desc","providerId":"2","owner":"admin2@http://localhost/server2","ownerDisplayName":"admin2 display","shareType":"user","resourceType":"file","protocol":{"name":"webdav","options":{"access_token":"8Lrd1FVEREthux7","permissions":31}}}' http://localhost/server/index.php/ocm/shares
+	 */
+	public function addShare($shareWith, $name, $description, $providerId, $owner, $ownerDisplayName, $sharedBy, $sharedByDisplayName, $protocol, $shareType, $resourceType) {
+
+		if (!$this->config->incomingRequestsEnabled()) {
+			return new JSONResponse(
+				['message' => 'This server doesn\'t support outgoing federated shares'],
+			Http::STATUS_NOT_IMPLEMENTED
+			);
+		}
+
+		// check if all required parameters are set
+		if ($shareWith === null ||
+			$name === null ||
+			$providerId === null ||
+			$owner === null ||
+			$resourceType === null ||
+			$shareType === null ||
+			!is_array($protocol) ||
+			!isset($protocol['name']) ||
+			!isset ($protocol['options']) ||
+			!is_array($protocol['options'])
+		) {
+			return new JSONResponse(
+				['message' => 'Missing arguments'],
+				Http::STATUS_BAD_REQUEST
+			);
+		}
+
+		$shareWith = $this->mapUid($shareWith);
+
+		if (!$this->userManager->userExists($shareWith)) {
+			return new JSONResponse(
+				['message' => 'User "' . $shareWith . '" does not exists at ' . $this->urlGenerator->getBaseUrl()],
+				Http::STATUS_BAD_REQUEST
+			);
+		}
+
+		// if no explicit display name is given, we use the uid as display name
+		$ownerDisplayName = $ownerDisplayName === null ? $owner : $ownerDisplayName;
+		$sharedByDisplayName = $sharedByDisplayName === null ? $sharedBy : $sharedByDisplayName;
+
+		// sharedBy* parameter is optional, if nothing is set we assume that it is the same user as the owner
+		if ($sharedBy === null) {
+			$sharedBy = $owner;
+			$sharedByDisplayName = $ownerDisplayName;
+		}
+
+		try {
+			$provider = $this->cloudFederationProviderManager->getCloudFederationProvider($resourceType);
+			$share = $this->factory->getCloudFederationShare($shareWith, $name, $description, $providerId, $owner, $ownerDisplayName, $sharedBy, $sharedByDisplayName, $protocol, $shareType, $resourceType);
+			$id = $provider->shareReceived($share);
+		} catch (ProviderDoesNotExistsException $e) {
+			return new JSONResponse(
+				['message' => $e->getMessage()],
+				Http::STATUS_NOT_IMPLEMENTED
+			);
+		} catch (ProviderCouldNotAddShareException $e) {
+			return new JSONResponse(
+				['message' => $e->getMessage()],
+				$e->getCode()
+			);
+		} catch (\Exception $e) {
+			return new JSONResponse(
+				['message' => 'Internal error at ' . $this->urlGenerator->getBaseUrl()],
+				Http::STATUS_BAD_REQUEST
+			);
+		}
+
+		return new JSONResponse(
+			['id' => $id, 'createdAt' => time()],
+			Http::STATUS_CREATED);
+
+	}
+
+	/**
+	 * receive notification about existing share
+	 *
+	 * @param $resourceType ('file', 'calendar',...)
+	 * @param string $name resource name (e.g "file", "calendar",...)
+	 * @param string $id unique id of the corresponding item on the receiving site
+	 * @param array $notification contain the actual notification, content is defined by cloud federation provider
+	 * @return JSONResponse
+	 */
+	public function receiveNotification($resourceType, $name, $id, $notification) {
+		if (!$this->config->incomingRequestsEnabled()) {
+			return new JSONResponse(
+				['message' => 'This server doesn\'t support outgoing federated shares'],
+				Http::STATUS_NOT_IMPLEMENTED
+			);
+		}
+
+		// check if all required parameters are set
+		if ($name === null ||
+			$id === null ||
+			!is_array($notification)
+		) {
+			return new JSONResponse(
+				['message' => 'Missing arguments'],
+				Http::STATUS_BAD_REQUEST
+			);
+		}
+
+		try {
+			$provider = $this->cloudFederationProviderManager->getCloudFederationProvider($resourceType);
+			$provider->notificationReceived($id, $notification);
+		} catch (ProviderDoesNotExistsException $e) {
+			return new JSONResponse(
+				['message' => $e->getMessage()],
+				Http::STATUS_BAD_REQUEST
+			);
+		} catch (ShareNotFoundException $e) {
+			return new JSONResponse(
+				['message' => $e->getMessage()],
+				Http::STATUS_BAD_REQUEST
+			);
+		} catch (\Exception $e) {
+			return new JSONResponse(
+				['message' => 'Internal error at ' . $this->urlGenerator->getBaseUrl()],
+				Http::STATUS_BAD_REQUEST
+			);
+		}
+
+
+		return new JSONResponse(
+			['id' => $id, 'createdAt' => date()],
+			Http::STATUS_CREATED);
+
+
+	}
+
+	/**
+	 * map login name to internal LDAP UID if a LDAP backend is in use
+	 *
+	 * @param string $uid
+	 * @return string mixed
+	 */
+	private function mapUid($uid) {
+		\OC::$server->getURLGenerator()->linkToDocs('key');
+		// FIXME this should be a method in the user management instead
+		$this->logger->debug('shareWith before, ' . $uid, ['app' => $this->appName]);
+		\OCP\Util::emitHook(
+			'\OCA\Files_Sharing\API\Server2Server',
+			'preLoginNameUsedAsUserName',
+			array('uid' => &$uid)
+		);
+		$this->logger->debug('shareWith after, ' . $uid, ['app' => $this->appName]);
+
+		return $uid;
+	}
+
+}