Merge pull request #21626 from owncloud/share-addressbooks-with-groups-2

Show group shared addressbooks

32 files changed, 587 insertions, 113 deletions

diff --git a/apps/dav/appinfo/application.php b/apps/dav/appinfo/application.php
index 3fce53b48bb..b681e273b59 100644
--- a/apps/dav/appinfo/application.php
+++ b/apps/dav/appinfo/application.php
@@ -67,7 +67,8 @@ class Application extends App {
 			$db = $c->getServer()->getDatabaseConnection();
 			$logger = $c->getServer()->getLogger();
 			$principal = new \OCA\DAV\Connector\Sabre\Principal(
-				$c->getServer()->getUserManager()
+				$c->getServer()->getUserManager(),
+				$c->getServer()->getGroupManager()
 			);
 			return new \OCA\DAV\CardDAV\CardDavBackend($db, $principal, $logger);
 		});
diff --git a/apps/dav/appinfo/register_command.php b/apps/dav/appinfo/register_command.php
index 3152712b7c0..8ef1979aa08 100644
--- a/apps/dav/appinfo/register_command.php
+++ b/apps/dav/appinfo/register_command.php
@@ -27,12 +27,13 @@ use OCA\DAV\Command\SyncSystemAddressBook;
 $config = \OC::$server->getConfig();
 $dbConnection = \OC::$server->getDatabaseConnection();
 $userManager = OC::$server->getUserManager();
+$groupManager = OC::$server->getGroupManager();
 $config = \OC::$server->getConfig();
 $logger = \OC::$server->getLogger();
 
 $app = new Application();
 
 /** @var Symfony\Component\Console\Application $application */
-$application->add(new CreateAddressBook($userManager, $dbConnection, $config, $logger));
+$application->add(new CreateAddressBook($userManager, $groupManager, $dbConnection, $logger));
 $application->add(new CreateCalendar($userManager, $dbConnection));
 $application->add(new SyncSystemAddressBook($app->getSyncService()));
diff --git a/apps/dav/command/createaddressbook.php b/apps/dav/command/createaddressbook.php
index 0e396074704..201101d17f4 100644
--- a/apps/dav/command/createaddressbook.php
+++ b/apps/dav/command/createaddressbook.php
@@ -25,6 +25,7 @@ use OCA\DAV\CardDAV\CardDavBackend;
 use OCA\DAV\Connector\Sabre\Principal;
 use OCP\IConfig;
 use OCP\IDBConnection;
+use OCP\IGroupManager;
 use OCP\ILogger;
 use OCP\IUserManager;
 use Symfony\Component\Console\Command\Command;
@@ -40,12 +41,12 @@ class CreateAddressBook extends Command {
 	/** @var \OCP\IDBConnection */
 	protected $dbConnection;
 
-	/** @var IConfig */
-	private $config;
-
 	/** @var ILogger  */
 	private $logger;
 
+	/** @var IGroupManager $groupManager */
+	private $groupManager;
+
 	/**
 	 * @param IUserManager $userManager
 	 * @param IDBConnection $dbConnection
@@ -53,14 +54,14 @@ class CreateAddressBook extends Command {
 	 * @param ILogger $logger
 	 */
 	function __construct(IUserManager $userManager,
+						 IGroupManager $groupManager,
 						 IDBConnection $dbConnection,
-						 IConfig $config,
 						 ILogger $logger
 	) {
 		parent::__construct();
 		$this->userManager = $userManager;
+		$this->groupManager = $groupManager;
 		$this->dbConnection = $dbConnection;
-		$this->config = $config;
 		$this->logger = $logger;
 	}
 
@@ -82,7 +83,8 @@ class CreateAddressBook extends Command {
 			throw new \InvalidArgumentException("User <$user> in unknown.");
 		}
 		$principalBackend = new Principal(
-				$this->userManager
+				$this->userManager,
+				$this->groupManager
 		);
 
 		$name = $input->getArgument('name');
diff --git a/apps/dav/command/syncsystemaddressbook.php b/apps/dav/command/syncsystemaddressbook.php
index c7401107480..50f570ec93e 100644
--- a/apps/dav/command/syncsystemaddressbook.php
+++ b/apps/dav/command/syncsystemaddressbook.php
@@ -20,18 +20,8 @@
  */
 namespace OCA\DAV\Command;
 
-use OCA\DAV\CardDAV\CardDavBackend;
-use OCA\DAV\CardDAV\Converter;
 use OCA\DAV\CardDAV\SyncService;
-use OCA\DAV\Connector\Sabre\Principal;
-use OCP\IConfig;
-use OCP\IDBConnection;
-use OCP\IUser;
 use OCP\IUserManager;
-use Sabre\CardDAV\Plugin;
-use Sabre\VObject\Component\VCard;
-use Sabre\VObject\Property\Text;
-use Sabre\VObject\Reader;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Helper\ProgressBar;
 use Symfony\Component\Console\Input\InputArgument;
diff --git a/apps/dav/lib/carddav/addressbook.php b/apps/dav/lib/carddav/addressbook.php
index 3e3e751828e..2cfaa7b708c 100644
--- a/apps/dav/lib/carddav/addressbook.php
+++ b/apps/dav/lib/carddav/addressbook.php
@@ -50,7 +50,7 @@ class AddressBook extends \Sabre\CardDAV\AddressBook implements IShareableAddres
 	function updateShares(array $add, array $remove) {
 		/** @var CardDavBackend $carddavBackend */
 		$carddavBackend = $this->carddavBackend;
-		$carddavBackend->updateShares($this->getName(), $add, $remove);
+		$carddavBackend->updateShares($this, $add, $remove);
 	}
 
 	/**
@@ -68,7 +68,7 @@ class AddressBook extends \Sabre\CardDAV\AddressBook implements IShareableAddres
 	function getShares() {
 		/** @var CardDavBackend $carddavBackend */
 		$carddavBackend = $this->carddavBackend;
-		$carddavBackend->getShares($this->getName());
+		return $carddavBackend->getShares($this->getBookId());
 	}
 
 	function getACL() {
@@ -81,7 +81,26 @@ class AddressBook extends \Sabre\CardDAV\AddressBook implements IShareableAddres
 			];
 		}
 
-		return $acl;
+		// add the current user
+		if (isset($this->addressBookInfo['{' . \OCA\DAV\CardDAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal'])) {
+			$owner = $this->addressBookInfo['{' . \OCA\DAV\CardDAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal'];
+			$acl[] = [
+					'privilege' => '{DAV:}read',
+					'principal' => $owner,
+					'protected' => true,
+				];
+			if ($this->addressBookInfo['{' . \OCA\DAV\CardDAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only']) {
+				$acl[] = [
+					'privilege' => '{DAV:}write',
+					'principal' => $owner,
+					'protected' => true,
+				];
+			}
+		}
+
+		/** @var CardDavBackend $carddavBackend */
+		$carddavBackend = $this->carddavBackend;
+		return $carddavBackend->applyShareAcl($this->getBookId(), $acl);
 	}
 
 	function getChildACL() {
@@ -94,15 +113,24 @@ class AddressBook extends \Sabre\CardDAV\AddressBook implements IShareableAddres
 			];
 		}
 
-		return $acl;
+		/** @var CardDavBackend $carddavBackend */
+		$carddavBackend = $this->carddavBackend;
+		return $carddavBackend->applyShareAcl($this->getBookId(), $acl);
 	}
 
 	function getChild($name) {
-		$obj = $this->carddavBackend->getCard($this->addressBookInfo['id'], $name);
+		$obj = $this->carddavBackend->getCard($this->getBookId(), $name);
 		if (!$obj) {
 			throw new NotFound('Card not found');
 		}
 		return new Card($this->carddavBackend, $this->addressBookInfo, $obj);
 	}
 
+	/**
+	 * @return int
+	 */
+	public function getBookId() {
+		return $this->addressBookInfo['id'];
+	}
+
 }
diff --git a/apps/dav/lib/carddav/card.php b/apps/dav/lib/carddav/card.php
index 5ec9a7e93a9..d848f2e28ec 100644
--- a/apps/dav/lib/carddav/card.php
+++ b/apps/dav/lib/carddav/card.php
@@ -33,7 +33,13 @@ class Card extends \Sabre\CardDAV\Card {
 			];
 		}
 
-		return $acl;
+		/** @var CardDavBackend $carddavBackend */
+		$carddavBackend = $this->carddavBackend;
+		return $carddavBackend->applyShareAcl($this->getBookId(), $acl);
+	}
+
+	private function getBookId() {
+		return $this->addressBookInfo['id'];
 	}
 
 }
diff --git a/apps/dav/lib/carddav/carddavbackend.php b/apps/dav/lib/carddav/carddavbackend.php
index 7deda07497f..7b8c43958b6 100644
--- a/apps/dav/lib/carddav/carddavbackend.php
+++ b/apps/dav/lib/carddav/carddavbackend.php
@@ -26,7 +26,6 @@ namespace OCA\DAV\CardDAV;
 
 use OCA\DAV\Connector\Sabre\Principal;
 use OCP\IDBConnection;
-use OCP\ILogger;
 use Sabre\CardDAV\Backend\BackendInterface;
 use Sabre\CardDAV\Backend\SyncSupport;
 use Sabre\CardDAV\Plugin;
@@ -53,6 +52,10 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 			'BDAY', 'UID', 'N', 'FN', 'TITLE', 'ROLE', 'NOTE', 'NICKNAME',
 			'ORG', 'CATEGORIES', 'EMAIL', 'TEL', 'IMPP', 'ADR', 'URL', 'GEO', 'CLOUD');
 
+	const ACCESS_OWNER = 1;
+	const ACCESS_READ_WRITE = 2;
+	const ACCESS_READ = 3;
+
 	/**
 	 * CardDavBackend constructor.
 	 *
@@ -65,7 +68,7 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 	}
 
 	/**
-	 * Returns the list of addressbooks for a specific user.
+	 * Returns the list of address books for a specific user.
 	 *
 	 * Every addressbook should have the following properties:
 	 *   id - an arbitrary unique id
@@ -105,28 +108,30 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 		$result->closeCursor();
 
 		// query for shared calendars
+		$principals = $this->principalBackend->getGroupMembership($principalUri);
+		$principals[]= $principalUri;
+
 		$query = $this->db->getQueryBuilder();
-		$query2 = $this->db->getQueryBuilder();
-		$query2->select(['resourceid'])
-			->from('dav_shares')
-			->where($query2->expr()->eq('principaluri', $query2->createParameter('principaluri')))
-			->andWhere($query2->expr()->eq('type', $query2->createParameter('type')));
-		$result = $query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
-			->from('addressbooks')
-			->where($query->expr()->in('id', $query->createFunction($query2->getSQL())))
+		$result = $query->select(['a.id', 'a.uri', 'a.displayname', 'a.principaluri', 'a.description', 'a.synctoken', 's.uri', 's.access'])
+			->from('dav_shares', 's')
+			->join('s', 'addressbooks', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
+			->where($query->expr()->in('s.principaluri', $query->createParameter('principaluri')))
+			->andWhere($query->expr()->eq('s.type', $query->createParameter('type')))
 			->setParameter('type', 'addressbook')
-			->setParameter('principaluri', $principalUri)
+			->setParameter('principaluri', $principals, \Doctrine\DBAL\Connection::PARAM_STR_ARRAY)
 			->execute();
 
 		while($row = $result->fetch()) {
 			$addressBooks[] = [
 				'id'  => $row['id'],
 				'uri' => $row['uri'],
-				'principaluri' => $row['principaluri'],
+				'principaluri' => $principalUri,
 				'{DAV:}displayname' => $row['displayname'],
 				'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
 				'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
 				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+				'{' . \OCA\DAV\CardDAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $row['principaluri'],
+				'{' . \OCA\DAV\CardDAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => $row['access'] === self::ACCESS_READ,
 			];
 		}
 		$result->closeCursor();
@@ -134,11 +139,43 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 		return $addressBooks;
 	}
 
-	public function getAddressBooksByUri($addressBookUri) {
+	/**
+	 * @param int $addressBookId
+	 */
+	public function getAddressBookById($addressBookId) {
+		$query = $this->db->getQueryBuilder();
+		$result = $query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
+			->from('addressbooks')
+			->where($query->expr()->eq('id', $query->createNamedParameter($addressBookId)))
+			->execute();
+
+		$row = $result->fetch();
+		$result->closeCursor();
+		if ($row === false) {
+			return null;
+		}
+
+		return [
+			'id'  => $row['id'],
+			'uri' => $row['uri'],
+			'principaluri' => $row['principaluri'],
+			'{DAV:}displayname' => $row['displayname'],
+			'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
+			'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
+			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+		];
+	}
+
+	/**
+	 * @param $addressBookUri
+	 * @return array|null
+	 */
+	public function getAddressBooksByUri($principal, $addressBookUri) {
 		$query = $this->db->getQueryBuilder();
 		$result = $query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
 			->from('addressbooks')
 			->where($query->expr()->eq('uri', $query->createNamedParameter($addressBookUri)))
+			->andWhere($query->expr()->eq('principaluri', $query->createNamedParameter($principal)))
 			->setMaxResults(1)
 			->execute();
 
@@ -217,6 +254,7 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 	 * @param string $principalUri
 	 * @param string $url Just the 'basename' of the url.
 	 * @param array $properties
+	 * @return int
 	 * @throws BadRequest
 	 */
 	function createAddressBook($principalUri, $url, array $properties) {
@@ -260,6 +298,8 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 			])
 			->setParameters($values)
 			->execute();
+
+		return $query->getLastInsertId();
 	}
 
 	/**
@@ -663,16 +703,16 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 	}
 
 	/**
-	 * @param string $path
+	 * @param AddressBook $book
 	 * @param string[] $add
 	 * @param string[] $remove
 	 */
-	public function updateShares($path, $add, $remove) {
+	public function updateShares($book, $add, $remove) {
 		foreach($add as $element) {
-			$this->shareWith($path, $element);
+			$this->shareWith($book, $element);
 		}
 		foreach($remove as $element) {
-			$this->unshare($path, $element);
+			$this->unshare($book->getBookId(), $element);
 		}
 	}
 
@@ -758,10 +798,10 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 
 
 	/**
-	 * @param string $addressBookUri
+	 * @param AddressBook $addressBook
 	 * @param string $element
 	 */
-	private function shareWith($addressBookUri, $element) {
+	private function shareWith($addressBook, $element) {
 		$user = $element['href'];
 		$parts = explode(':', $user, 2);
 		if ($parts[0] !== 'principal') {
@@ -772,31 +812,31 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 			return;
 		}
 
-		$addressBook = $this->getAddressBooksByUri($addressBookUri);
-		if (is_null($addressBook)) {
-			return;
-		}
-
 		// remove the share if it already exists
-		$this->unshare($addressBookUri, $element['href']);
+		$this->unshare($addressBook->getBookId(), $element['href']);
+		$access = self::ACCESS_READ;
+		if (isset($element['readOnly'])) {
+			$access = $element['readOnly'] ? self::ACCESS_READ : self::ACCESS_READ_WRITE;
+		}
 
+		$newUri = sha1($addressBook->getName() . $addressBook->getOwner());
 		$query = $this->db->getQueryBuilder();
 		$query->insert('dav_shares')
 			->values([
 				'principaluri' => $query->createNamedParameter($parts[1]),
-				'uri' => $query->createNamedParameter($addressBookUri),
+				'uri' => $query->createNamedParameter($newUri),
 				'type' => $query->createNamedParameter('addressbook'),
-				'access' => $query->createNamedParameter(0),
-				'resourceid' => $query->createNamedParameter($addressBook['id'])
+				'access' => $query->createNamedParameter($access),
+				'resourceid' => $query->createNamedParameter($addressBook->getBookId())
 			]);
 		$query->execute();
 	}
 
 	/**
-	 * @param string $addressBookUri
+	 * @param int $addressBookId
 	 * @param string $element
 	 */
-	private function unshare($addressBookUri, $element) {
+	private function unshare($addressBookId, $element) {
 		$parts = explode(':', $element, 2);
 		if ($parts[0] !== 'principal') {
 			return;
@@ -806,14 +846,9 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 			return;
 		}
 
-		$addressBook = $this->getAddressBooksByUri($addressBookUri);
-		if (is_null($addressBook)) {
-			return;
-		}
-
 		$query = $this->db->getQueryBuilder();
 		$query->delete('dav_shares')
-			->where($query->expr()->eq('resourceid', $query->createNamedParameter($addressBook['id'])))
+			->where($query->expr()->eq('resourceid', $query->createNamedParameter($addressBookId)))
 			->andWhere($query->expr()->eq('type', $query->createNamedParameter('addressbook')))
 			->andWhere($query->expr()->eq('principaluri', $query->createNamedParameter($parts[1])))
 		;
@@ -832,11 +867,11 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 	 *
 	 * @return array
 	 */
-	public function getShares($addressBookUri) {
+	public function getShares($addressBookId) {
 		$query = $this->db->getQueryBuilder();
 		$result = $query->select(['principaluri', 'access'])
 			->from('dav_shares')
-			->where($query->expr()->eq('uri', $query->createNamedParameter($addressBookUri)))
+			->where($query->expr()->eq('resourceid', $query->createNamedParameter($addressBookId)))
 			->andWhere($query->expr()->eq('type', $query->createNamedParameter('addressbook')))
 			->execute();
 
@@ -847,7 +882,8 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 				'href' => "principal:${p['uri']}",
 				'commonName' => isset($p['{DAV:}displayname']) ? $p['{DAV:}displayname'] : '',
 				'status' => 1,
-				'readOnly' => ($row['access'] === 1)
+				'readOnly' => ($row['access'] === self::ACCESS_READ),
+				'{'.\OCA\DAV\CardDAV\Sharing\Plugin::NS_OWNCLOUD.'}principal' => $p['uri']
 			];
 		}
 
@@ -942,4 +978,30 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 
 		return (int)$cardIds['id'];
 	}
+
+	/**
+	 * For shared address books the sharee is set in the ACL of the address book
+	 * @param $addressBookId
+	 * @param $acl
+	 * @return array
+	 */
+	public function applyShareAcl($addressBookId, $acl) {
+
+		$shares = $this->getShares($addressBookId);
+		foreach ($shares as $share) {
+			$acl[] = [
+				'privilege' => '{DAV:}read',
+				'principal' => $share['{' . \OCA\DAV\CardDAV\Sharing\Plugin::NS_OWNCLOUD . '}principal'],
+				'protected' => true,
+			];
+			if (!$share['readOnly']) {
+				$acl[] = [
+					'privilege' => '{DAV:}write',
+					'principal' => $share['{' . \OCA\DAV\CardDAV\Sharing\Plugin::NS_OWNCLOUD . '}principal'],
+					'protected' => true,
+				];
+			}
+		}
+		return $acl;
+	}
 }
diff --git a/apps/dav/lib/carddav/sharing/plugin.php b/apps/dav/lib/carddav/sharing/plugin.php
index 7ad3f43dca8..d25b84d01f3 100644
--- a/apps/dav/lib/carddav/sharing/plugin.php
+++ b/apps/dav/lib/carddav/sharing/plugin.php
@@ -34,6 +34,8 @@ use Sabre\HTTP\ResponseInterface;
 
 class Plugin extends ServerPlugin {
 
+	const NS_OWNCLOUD = 'http://owncloud.org/ns';
+
 	/** @var Auth */
 	private $auth;
 
@@ -100,7 +102,7 @@ class Plugin extends ServerPlugin {
 	function initialize(Server $server) {
 		$this->server = $server;
 		$server->resourceTypeMapping['OCA\\DAV\CardDAV\\ISharedAddressbook'] = '{' . \Sabre\CardDAV\Plugin::NS_CARDDAV . '}shared';
-		$this->server->xml->elementMap['{' . \Sabre\CardDAV\Plugin::NS_CARDDAV . '}share'] = 'OCA\\DAV\\CardDAV\\Sharing\\Xml\\ShareRequest';
+		$this->server->xml->elementMap['{' . Plugin::NS_OWNCLOUD . '}share'] = 'OCA\\DAV\\CardDAV\\Sharing\\Xml\\ShareRequest';
 
 		$this->server->on('method:POST', [$this, 'httpPost']);
 	}
@@ -148,7 +150,7 @@ class Plugin extends ServerPlugin {
 
 			// Dealing with the 'share' document, which modified invitees on a
 			// calendar.
-			case '{' . \Sabre\CardDAV\Plugin::NS_CARDDAV . '}share' :
+			case '{' . self::NS_OWNCLOUD . '}share' :
 
 				// We can only deal with IShareableCalendar objects
 				if (!$node instanceof IShareableAddressBook) {
diff --git a/apps/dav/lib/carddav/sharing/xml/sharerequest.php b/apps/dav/lib/carddav/sharing/xml/sharerequest.php
index 6be6bd795a1..bd55dd4073e 100644
--- a/apps/dav/lib/carddav/sharing/xml/sharerequest.php
+++ b/apps/dav/lib/carddav/sharing/xml/sharerequest.php
@@ -20,6 +20,7 @@
  */
 namespace OCA\DAV\CardDAV\Sharing\Xml;
 
+use OCA\DAV\CardDAV\Sharing\Plugin;
 use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
 
@@ -44,32 +45,32 @@ class ShareRequest implements XmlDeserializable {
 
     static function xmlDeserialize(Reader $reader) {
 
-        $elems = $reader->parseInnerTree([
-            '{' . \Sabre\CardDAV\Plugin::NS_CARDDAV. '}set'    => 'Sabre\\Xml\\Element\\KeyValue',
-            '{' . \Sabre\CardDAV\Plugin::NS_CARDDAV . '}remove' => 'Sabre\\Xml\\Element\\KeyValue',
+        $elements = $reader->parseInnerTree([
+            '{' . Plugin::NS_OWNCLOUD. '}set'    => 'Sabre\\Xml\\Element\\KeyValue',
+            '{' . Plugin::NS_OWNCLOUD . '}remove' => 'Sabre\\Xml\\Element\\KeyValue',
         ]);
 
         $set = [];
         $remove = [];
 
-        foreach ($elems as $elem) {
+        foreach ($elements as $elem) {
             switch ($elem['name']) {
 
-                case '{' . \Sabre\CardDAV\Plugin::NS_CARDDAV . '}set' :
+                case '{' . Plugin::NS_OWNCLOUD . '}set' :
                     $sharee = $elem['value'];
 
-                    $sumElem = '{' . \Sabre\CardDAV\Plugin::NS_CARDDAV . '}summary';
-                    $commonName = '{' . \Sabre\CardDAV\Plugin::NS_CARDDAV . '}common-name';
+                    $sumElem = '{' . Plugin::NS_OWNCLOUD . '}summary';
+                    $commonName = '{' . Plugin::NS_OWNCLOUD . '}common-name';
 
                     $set[] = [
                         'href'       => $sharee['{DAV:}href'],
                         'commonName' => isset($sharee[$commonName]) ? $sharee[$commonName] : null,
                         'summary'    => isset($sharee[$sumElem]) ? $sharee[$sumElem] : null,
-                        'readOnly'   => !array_key_exists('{' . \Sabre\CardDAV\Plugin::NS_CARDDAV . '}read-write', $sharee),
+                        'readOnly'   => !array_key_exists('{' . Plugin::NS_OWNCLOUD . '}read-write', $sharee),
                     ];
                     break;
 
-                case '{' . \Sabre\CardDAV\Plugin::NS_CARDDAV . '}remove' :
+                case '{' . Plugin::NS_OWNCLOUD . '}remove' :
                     $remove[] = $elem['value']['{DAV:}href'];
                     break;
 
diff --git a/apps/dav/lib/carddav/syncservice.php b/apps/dav/lib/carddav/syncservice.php
index 97a46d62501..d66d316f6f7 100644
--- a/apps/dav/lib/carddav/syncservice.php
+++ b/apps/dav/lib/carddav/syncservice.php
@@ -90,13 +90,13 @@ class SyncService {
 	 * @throws \Sabre\DAV\Exception\BadRequest
 	 */
 	public function ensureSystemAddressBookExists($principal, $id, $properties) {
-		$book = $this->backend->getAddressBooksByUri($id);
+		$book = $this->backend->getAddressBooksByUri($principal, $id);
 		if (!is_null($book)) {
 			return $book;
 		}
 		$this->backend->createAddressBook($principal, $id, $properties);
 
-		return $this->backend->getAddressBooksByUri($id);
+		return $this->backend->getAddressBooksByUri($principal, $id);
 	}
 
 	/**
diff --git a/apps/dav/lib/connector/sabre/principal.php b/apps/dav/lib/connector/sabre/principal.php
index ece799c7019..5f02d1271df 100644
--- a/apps/dav/lib/connector/sabre/principal.php
+++ b/apps/dav/lib/connector/sabre/principal.php
@@ -29,9 +29,10 @@
 
 namespace OCA\DAV\Connector\Sabre;
 
+use OCP\IGroup;
+use OCP\IGroupManager;
 use OCP\IUser;
 use OCP\IUserManager;
-use OCP\IConfig;
 use Sabre\DAV\Exception;
 use \Sabre\DAV\PropPatch;
 use Sabre\DAVACL\PrincipalBackend\BackendInterface;
@@ -42,11 +43,15 @@ class Principal implements BackendInterface {
 	/** @var IUserManager */
 	private $userManager;
 
+	/** @var IGroupManager */
+	private $groupManager;
+
 	/**
 	 * @param IUserManager $userManager
 	 */
-	public function __construct(IUserManager $userManager) {
+	public function __construct(IUserManager $userManager, IGroupManager $groupManager) {
 		$this->userManager = $userManager;
+		$this->groupManager = $groupManager;
 	}
 
 	/**
@@ -127,24 +132,23 @@ class Principal implements BackendInterface {
 	public function getGroupMembership($principal) {
 		list($prefix, $name) = URLUtil::splitPath($principal);
 
-		$group_membership = array();
 		if ($prefix === 'principals/users') {
-			$principal = $this->getPrincipalByPath($principal);
-			if (!$principal) {
+			$user = $this->userManager->get($name);
+			if (!$user) {
 				throw new Exception('Principal not found');
 			}
 
-			// TODO: for now the user principal has only its own groups
-			return array(
-				'principals/users/'.$name.'/calendar-proxy-read',
-				'principals/users/'.$name.'/calendar-proxy-write',
-				// The addressbook groups are not supported in Sabre,
-				// see http://groups.google.com/group/sabredav-discuss/browse_thread/thread/ef2fa9759d55f8c#msg_5720afc11602e753
-				//'principals/'.$name.'/addressbook-proxy-read',
-				//'principals/'.$name.'/addressbook-proxy-write',
-			);
+			$groups = $this->groupManager->getUserGroups($user);
+			$groups = array_map(function($group) {
+				/** @var IGroup $group */
+				return 'principals/groups/' . $group->getGID();
+			}, $groups);
+
+			$groups[]= 'principals/users/'.$name.'/calendar-proxy-read';
+			$groups[]= 'principals/users/'.$name.'/calendar-proxy-write';
+			return $groups;
 		}
-		return $group_membership;
+		return [];
 	}
 
 	/**
@@ -207,4 +211,5 @@ class Principal implements BackendInterface {
 		}
 		return $principal;
 	}
+
 }
diff --git a/apps/dav/lib/rootcollection.php b/apps/dav/lib/rootcollection.php
index 8e0e0c6b86f..0afde97a9e7 100644
--- a/apps/dav/lib/rootcollection.php
+++ b/apps/dav/lib/rootcollection.php
@@ -37,7 +37,8 @@ class RootCollection extends SimpleCollection {
 		$config = \OC::$server->getConfig();
 		$db = \OC::$server->getDatabaseConnection();
 		$userPrincipalBackend = new Principal(
-			\OC::$server->getUserManager()
+			\OC::$server->getUserManager(),
+			\OC::$server->getGroupManager()
 		);
 		$groupPrincipalBackend = new GroupPrincipalBackend(
 			\OC::$server->getGroupManager()
diff --git a/apps/dav/tests/travis/caldav/script.sh b/apps/dav/tests/travis/caldav/script.sh
index 9a818b553f7..a295c83ad94 100644
--- a/apps/dav/tests/travis/caldav/script.sh
+++ b/apps/dav/tests/travis/caldav/script.sh
@@ -9,7 +9,7 @@ sleep 30
 
 # run the tests
 cd "$SCRIPTPATH/CalDAVTester"
-PYTHONPATH="$SCRIPTPATH/pycalendar/src" python testcaldav.py --print-details-onfail -s "$SCRIPTPATH/../caldavtest/config/serverinfo.xml" -o cdt.txt \
+PYTHONPATH="$SCRIPTPATH/pycalendar/src" python testcaldav.py --print-details-onfail -s "$SCRIPTPATH/../caldavtest/serverinfo.xml" -o cdt.txt \
 	"$SCRIPTPATH/../caldavtest/tests/CalDAV/current-user-principal.xml"
 RESULT=$?
 
diff --git a/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/1.xml b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/1.xml
new file mode 100644
index 00000000000..20d2ebf4cfc
--- /dev/null
+++ b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/1.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<CS:share xmlns:D="DAV:" xmlns:CS="http://owncloud.org/ns">
+    <CS:set>
+        <D:href>principal:principals/users/user02</D:href>
+        <CS:summary>My Shared Calendar</CS:summary>
+        <CS:read-write/>
+    </CS:set>
+</CS:share>
diff --git a/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/4.xml b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/4.xml
new file mode 100644
index 00000000000..fd0f248bb31
--- /dev/null
+++ b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/4.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<D:propfind xmlns:D="DAV:">
+<D:prop>
+<D:resourcetype/>
+<D:owner/>
+<D:current-user-privilege-set/>
+</D:prop>
+</D:propfind>
diff --git a/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/6.vcf b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/6.vcf
new file mode 100644
index 00000000000..6b53f8ba3bf
--- /dev/null
+++ b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/6.vcf
@@ -0,0 +1,11 @@
+BEGIN:VCARD
+VERSION:3.0
+N:Thompson;Default;;;
+FN:Default Thompson
+EMAIL;TYPE=INTERNET,WORK,pref:lthompson@example.com
+TEL;TYPE=WORK,pref:1-555-555-5555
+TEL;TYPE=CELL:1-555-555-5555
+ITEM1.ADR;TYPE=WORK,pref:;;2 Lag;Elk Forest;California;99999;USA
+ITEM1.X-ABADR:us
+UID:ED7A5AEC-AB19-4CE0-AD6A-2923A3E5C4E1:ABPerson
+END:VCARD
diff --git a/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/7.vcf b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/7.vcf
new file mode 100644
index 00000000000..27fdb9fae5f
--- /dev/null
+++ b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/7.vcf
@@ -0,0 +1,11 @@
+BEGIN:VCARD
+VERSION:3.0
+N:Thompson;Default;;;
+FN:Default Thompson
+EMAIL;TYPE=INTERNET,WORK,pref:lthompson@example.net
+TEL;TYPE=WORK,pref:1-555-555-5555
+TEL;TYPE=CELL:1-555-555-6666
+ITEM1.ADR;TYPE=WORK,pref:;;2 Lag;Elk Forest;California;99999;USA
+ITEM1.X-ABADR:us
+UID:ED7A5AEC-AB19-4CE0-AD6A-2923A3E5C4E1:ABPerson
+END:VCARD
diff --git a/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/8.vcf b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/8.vcf
new file mode 100644
index 00000000000..9188fdd913c
--- /dev/null
+++ b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/8.vcf
@@ -0,0 +1,11 @@
+BEGIN:VCARD
+VERSION:3.0
+N:Miller;Default;;;
+FN:Default Miller
+EMAIL;TYPE=INTERNET,WORK,pref:lthompson@example.com
+TEL;TYPE=WORK,pref:1-555-555-5555
+TEL;TYPE=CELL:1-555-555-5555
+ITEM1.ADR;TYPE=WORK,pref:;;2 Lag;Elk Forest;California;99999;USA
+ITEM1.X-ABADR:us
+UID:ED7A5AEC-AB19-4CE0-AD6A-2923A3E5C4E1:ABPerson
+END:VCARD
diff --git a/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/9.vcf b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/9.vcf
new file mode 100644
index 00000000000..1ca0a36ca4c
--- /dev/null
+++ b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/sharing/read-write/9.vcf
@@ -0,0 +1,11 @@
+BEGIN:VCARD
+VERSION:3.0
+N:Smith;Default;;;
+FN:Default Smith
+EMAIL;TYPE=INTERNET,WORK,pref:lthompson@example.com
+TEL;TYPE=WORK,pref:1-555-555-5555
+TEL;TYPE=CELL:1-555-555-5555
+ITEM1.ADR;TYPE=WORK,pref:;;2 Lag;Elk Forest;California;99999;USA
+ITEM1.X-ABADR:us
+UID:ED7A5AEC-AB19-4CE0-AD6A-2923A3E5C4E1:ABPerson
+END:VCARD
diff --git a/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vcurrent-user-principal/1.xml b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vcurrent-user-principal/1.xml
new file mode 100644
index 00000000000..dffedc6880d
--- /dev/null
+++ b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vcurrent-user-principal/1.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<D:propfind xmlns:D="DAV:">
+<D:prop>
+<D:current-user-principal/>
+</D:prop>
+</D:propfind>
diff --git a/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/put/1.vcf b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/put/1.vcf
new file mode 100644
index 00000000000..2121c65f1f4
--- /dev/null
+++ b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/put/1.vcf
@@ -0,0 +1,11 @@
+BEGIN:VCARD
+VERSION:3.0
+N:Thompson;Default;;;
+FN:Default Thompson
+EMAIL;type=INTERNET;type=WORK;type=pref:lthompson@example.com
+TEL;type=WORK;type=pref:1-555-555-5555
+TEL;type=CELL:1-555-555-5555
+item1.ADR;type=WORK;type=pref:;;2 Lag;Elk Forest;California;99999;USA
+item1.X-ABADR:us
+UID:ED7A5AEC-AB19-4CE0-AD6A-2923A3E5C4E1:ABPerson
+END:VCARD
diff --git a/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/put/2.vcf b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/put/2.vcf
new file mode 100644
index 00000000000..390a3d8ae69
--- /dev/null
+++ b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/put/2.vcf
@@ -0,0 +1,17 @@
+BEGIN:VCARD
+VERSION:3.0
+N:Contact;Mulberry;;;
+FN:Mulberry Contact
+NICKNAME:mulberry
+ORG:Apple Inc.;
+EMAIL;type=INTERNET;type=WORK;type=pref:mulberry_contact@example.com
+TEL;type=HOME;type=pref:555-555-5555
+TEL;type=WORK:555-555-5555
+TEL;type=WORK;type=FAX:555-555-5555
+item1.ADR;type=WORK;type=pref:;;1 Infinite Circle;Exampletino\, CA 99999;USA;;
+item1.X-ABADR:us
+NOTE:This is a contact created in Mulberry.
+item2.URL;type=pref:http://www.example.com/~magic
+item2.X-ABLabel:_$!<HomePage>!$_
+UID:782DAAF92CB1ED1BC155CDB3@D76FAF7B10D9E8D2D41F779D
+END:VCARD
diff --git a/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/put/3.vcf b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/put/3.vcf
new file mode 100644
index 00000000000..37c3b81bdcf
--- /dev/null
+++ b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/put/3.vcf
@@ -0,0 +1,12 @@
+BEGIN:VCARD
+VERSION:3.0
+N:Kawado;Saeko;;;
+FN:Snow Leopard
+ORG:Snow Leopard;
+EMAIL;type=INTERNET;type=WORK;type=pref:snowleopard_apple@example.com
+TEL;type=WORK;type=pref:555-555-5555
+item1.ADR;type=WORK;type=pref:;;2 Fidel Ave. Suite 1;Mountain Top;CA;99999;USA
+item1.X-ABADR:us
+X-ABShowAs:COMPANY
+UID:FCBA0FA3-00B2-4C95-B4EC-4CCC4843F8B1:ABPerson
+END:VCARD
diff --git a/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/sync/1.xml b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/sync/1.xml
new file mode 100644
index 00000000000..7f454b38900
--- /dev/null
+++ b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/sync/1.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<D:propfind xmlns:D="DAV:">
+<D:prop>
+<D:supported-report-set/>
+<D:sync-token/>
+</D:prop>
+</D:propfind>
diff --git a/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/sync/2.xml b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/sync/2.xml
new file mode 100644
index 00000000000..99ee3dbb0e0
--- /dev/null
+++ b/apps/dav/tests/travis/caldavtest/data/Resource/CardDAV/vreports/sync/2.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<D:sync-collection xmlns:D="DAV:">
+<D:sync-token/>
+<D:prop/>
+</D:sync-collection>
diff --git a/apps/dav/tests/travis/caldavtest/config/serverinfo.dtd b/apps/dav/tests/travis/caldavtest/serverinfo.dtd
index d642f4f90cd..d642f4f90cd 100644
--- a/apps/dav/tests/travis/caldavtest/config/serverinfo.dtd
+++ b/apps/dav/tests/travis/caldavtest/serverinfo.dtd
diff --git a/apps/dav/tests/travis/caldavtest/config/serverinfo.xml b/apps/dav/tests/travis/caldavtest/serverinfo.xml
index c80e47f9481..dea8f5af0f3 100644
--- a/apps/dav/tests/travis/caldavtest/config/serverinfo.xml
+++ b/apps/dav/tests/travis/caldavtest/serverinfo.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" standalone="no"?>
 
 <!DOCTYPE serverinfo SYSTEM
-		"/home/deepdiver/Development/ownCloud/master/apps/dav/tests/travis/caldavtest/config/serverinfo.dtd">
+		"/home/deepdiver/Development/ownCloud/master/apps/dav/tests/travis/caldavtest/serverinfo.dtd">
 
 <!--
  Copyright (c) 2006-2015 Apple Inc. All rights reserved.
diff --git a/apps/dav/tests/travis/caldavtest/tests/CardDAV/sharing-addressbooks.xml b/apps/dav/tests/travis/caldavtest/tests/CardDAV/sharing-addressbooks.xml
new file mode 100644
index 00000000000..046c3d59dbd
--- /dev/null
+++ b/apps/dav/tests/travis/caldavtest/tests/CardDAV/sharing-addressbooks.xml
@@ -0,0 +1,246 @@
+<?xml version="1.0" standalone="no"?>
+
+<!DOCTYPE caldavtest SYSTEM "caldavtest.dtd">
+
+<caldavtest>
+	<description>Test addressbook sharing</description>
+
+	<require-feature>
+		<feature>carddav</feature>
+	</require-feature>
+
+	<start>
+	</start>
+	
+	<test-suite name='Read-write addressbook'>
+		<test name='1'>
+			<description>POST invitation</description>
+			<request>
+				<method>POST</method>
+				<ruri>$addressbookpath1:</ruri>
+				<data>
+					<content-type>text/xml; charset=utf-8</content-type>
+					<filepath>Resource/CardDAV/sharing/read-write/1.xml</filepath>
+				</data>
+				<verify>
+					<callback>statusCode</callback>
+				</verify>
+			</request>
+		</test>
+		<test name='4'>
+			<description>Shared addressbook exists</description>
+			<request user="$userid2:" pswd="$pswd2:">
+				<method>PROPFIND</method>
+				<ruri>$addressbookpath1:/</ruri>
+				<header>
+					<name>Depth</name>
+					<value>0</value>
+				</header>
+				<data>
+					<content-type>text/xml; charset=utf-8</content-type>
+					<filepath>Resource/CardDAV/sharing/read-write/4.xml</filepath>
+				</data>
+				<verify>
+					<callback>xmlElementMatch</callback>
+					<arg>
+						<name>exists</name>
+						<value>$verify-property-prefix:/{DAV:}owner/{DAV:}href[=$principaluri1:]</value>
+						<value>$verify-property-prefix:/{DAV:}resourcetype/{DAV:}collection</value>
+						<value>$verify-property-prefix:/{DAV:}resourcetype/{urn:ietf:params:xml:ns:carddav}addressbook</value>
+						<value>$verify-property-prefix:/{DAV:}current-user-privilege-set/{DAV:}privilege/{DAV:}read</value>
+						<value>$verify-property-prefix:/{DAV:}current-user-privilege-set/{DAV:}privilege/{DAV:}write</value>
+						<value>$verify-property-prefix:/{DAV:}current-user-privilege-set/{DAV:}privilege/{DAV:}bind</value>
+						<value>$verify-property-prefix:/{DAV:}current-user-privilege-set/{DAV:}privilege/{DAV:}unbind</value>
+					</arg>
+					<arg>
+						<name>notexists</name>
+						<value>$verify-property-prefix:/{DAV:}current-user-privilege-set/{DAV:}privilege/{DAV:}admin</value>
+						<value>$verify-property-prefix:/{DAV:}current-user-privilege-set/{DAV:}privilege/{DAV:}all</value>
+					</arg>
+				</verify>
+			</request>
+		</test>
+
+		<test name='4a'>
+			<description>Shared calendar exists Depth:1</description>
+			<request user="$userid2:" pswd="$pswd2:">
+				<method>PROPFIND</method>
+				<ruri>$addressbookhome2:/</ruri>
+				<header>
+					<name>Depth</name>
+					<value>1</value>
+				</header>
+				<data>
+					<content-type>text/xml; charset=utf-8</content-type>
+					<filepath>Resource/CardDAV/sharing/read-write/4.xml</filepath>
+				</data>
+				<verify>
+					<callback>xmlElementMatch</callback>
+					<arg>
+						<name>parent</name>
+						<value>$multistatus-response-prefix:[^{DAV:}href=$addressbookhome2:/ade1a55d408167e8ff77611c0eebe8f80579b549/]</value>
+					</arg>
+					<arg>
+						<name>exists</name>
+						<!--<value>$verify-response-prefix:/{DAV:}owner/{DAV:}href[=$principaluri1:]</value>-->
+						<value>$verify-response-prefix:/{DAV:}resourcetype/{DAV:}collection</value>
+						<value>$verify-response-prefix:/{DAV:}resourcetype/{urn:ietf:params:xml:ns:carddav}addressbook</value>
+						<value>$verify-response-prefix:/{DAV:}current-user-privilege-set/{DAV:}privilege/{DAV:}read</value>
+						<value>$verify-response-prefix:/{DAV:}current-user-privilege-set/{DAV:}privilege/{DAV:}write</value>
+						<value>$verify-response-prefix:/{DAV:}current-user-privilege-set/{DAV:}privilege/{DAV:}bind</value>
+						<value>$verify-response-prefix:/{DAV:}current-user-privilege-set/{DAV:}privilege/{DAV:}unbind</value>
+					</arg>
+					<arg>
+						<name>notexists</name>
+						<value>$verify-response-prefix:/{DAV:}current-user-privilege-set/{DAV:}privilege/{DAV:}admin</value>
+						<value>$verify-response-prefix:/{DAV:}current-user-privilege-set/{DAV:}privilege/{DAV:}all</value>
+					</arg>
+				</verify>
+			</request>
+		</test>
+
+		<test name='5'>
+			<description>Original calendar unchanged</description>
+			<request>
+				<method>PROPFIND</method>
+				<ruri>$addressbookpath1:</ruri>
+				<header>
+					<name>Depth</name>
+					<value>0</value>
+				</header>
+				<data>
+					<content-type>text/xml; charset=utf-8</content-type>
+					<filepath>Resource/CardDAV/sharing/read-write/4.xml</filepath>
+				</data>
+				<verify>
+					<callback>xmlElementMatch</callback>
+					<arg>
+						<name>exists</name>
+						<value>$verify-property-prefix:/{DAV:}owner/{DAV:}href[=$principaluri1:]</value>
+					</arg>
+				</verify>
+			</request>
+		</test>
+
+		<test name='6'>
+			<description>Sharee creates contact</description>
+			<request user="$userid2:" pswd="$pswd2:">
+				<method>PUT</method>
+				<ruri>$addressbookpath1:/1.vcf</ruri>
+				<data>
+					<content-type>text/vcard; charset=utf-8</content-type>
+					<filepath>Resource/CardDAV/sharing/read-write/6.vcf</filepath>
+				</data>
+				<verify>
+					<callback>statusCode</callback>
+				</verify>
+			</request>
+		</test>
+
+		<test name='7'>
+			<description>Sharer sees contact</description>
+			<request>
+				<method>GET</method>
+				<ruri>$addressbookpath1:/1.vcf</ruri>
+				<verify>
+					<callback>addressDataMatch</callback>
+					<arg>
+						<name>filepath</name>
+						<value>Resource/CardDAV/sharing/read-write/6.vcf</value>
+					</arg>
+				</verify>
+			</request>
+		</test>
+
+		<test name='8'>
+			<description>Sharer changes contact</description>
+			<request>
+				<method>PUT</method>
+				<ruri>$addressbookpath1:/1.vcf</ruri>
+				<data>
+					<content-type>text/vcard; charset=utf-8</content-type>
+					<filepath>Resource/CardDAV/sharing/read-write/7.vcf</filepath>
+				</data>
+				<verify>
+					<callback>statusCode</callback>
+				</verify>
+			</request>
+		</test>
+
+		<test name='9'>
+			<description>Sharee sees changed contact</description>
+			<request user="$userid2:" pswd="$pswd2:">
+				<method>GET</method>
+				<ruri>$addressbookpath1:/1.vcf</ruri>
+				<verify>
+					<callback>addressDataMatch</callback>
+					<arg>
+						<name>filepath</name>
+						<value>Resource/CardDAV/sharing/read-write/7.vcf</value>
+					</arg>
+				</verify>
+			</request>
+		</test>
+
+		<test name='10'>
+			<description>Sharer creates event</description>
+			<request>
+				<method>PUT</method>
+				<ruri>$addressbookpath1:/2.vcf</ruri>
+				<data>
+					<content-type>text/vcard; charset=utf-8</content-type>
+					<filepath>Resource/CardDAV/sharing/read-write/8.vcf</filepath>
+				</data>
+				<verify>
+					<callback>statusCode</callback>
+				</verify>
+			</request>
+		</test>
+		<test name='11'>
+			<description>Sharee sees new event</description>
+			<request user="$userid2:" pswd="$pswd2:">
+				<method>GET</method>
+				<ruri>$addressbookpath1:/2.vcf</ruri>
+				<verify>
+					<callback>addressDataMatch</callback>
+					<arg>
+						<name>filepath</name>
+						<value>Resource/CardDAV/sharing/read-write/8.vcf</value>
+					</arg>
+				</verify>
+			</request>
+		</test>
+		<test name='12'>
+			<description>Sharee changes event</description>
+			<request user="$userid2:" pswd="$pswd2:">
+				<method>PUT</method>
+				<ruri>$addressbookpath1:/2.vcf</ruri>
+				<data>
+					<content-type>text/vcard; charset=utf-8</content-type>
+					<filepath>Resource/CardDAV/sharing/read-write/9.vcf</filepath>
+				</data>
+				<verify>
+					<callback>statusCode</callback>
+				</verify>
+			</request>
+		</test>
+		<test name='13'>
+			<description>Sharer sees changed event</description>
+			<request>
+				<method>GET</method>
+				<ruri>$addressbookpath1:/2.vcf</ruri>
+				<verify>
+					<callback>addressDataMatch</callback>
+					<arg>
+						<name>filepath</name>
+						<value>Resource/CardDAV/sharing/read-write/9.vcf</value>
+					</arg>
+				</verify>
+			</request>
+		</test>
+	</test-suite>
+	
+	<end>
+	</end>
+
+</caldavtest>
diff --git a/apps/dav/tests/travis/carddav/script.sh b/apps/dav/tests/travis/carddav/script.sh
index 46a6a98e273..a8bd9f11b38 100644
--- a/apps/dav/tests/travis/carddav/script.sh
+++ b/apps/dav/tests/travis/carddav/script.sh
@@ -9,9 +9,12 @@ sleep 30
 
 # run the tests
 cd "$SCRIPTPATH/CalDAVTester"
-PYTHONPATH="$SCRIPTPATH/pycalendar/src" python testcaldav.py --print-details-onfail -s "$SCRIPTPATH/../caldavtest/config/serverinfo.xml" -o cdt.txt \
-	"$SCRIPTPATH/../caldavtest/tests/CardDAV/current-user-principal.xml" \
-	"$SCRIPTPATH/../caldavtest/tests/CardDAV/sync-report.xml"
+PYTHONPATH="$SCRIPTPATH/pycalendar/src" python testcaldav.py --print-details-onfail --basedir "$SCRIPTPATH/../caldavtest/" -o cdt.txt \
+	"CardDAV/current-user-principal.xml" \
+	"CardDAV/sync-report.xml" \
+	"CardDAV/sharing-addressbooks.xml"
+
+
 RESULT=$?
 
 tail "$/../../../../../data-autotest/owncloud.log"
diff --git a/apps/dav/tests/unit/carddav/carddavbackendtest.php b/apps/dav/tests/unit/carddav/carddavbackendtest.php
index 3841d1904ab..3291314ec40 100644
--- a/apps/dav/tests/unit/carddav/carddavbackendtest.php
+++ b/apps/dav/tests/unit/carddav/carddavbackendtest.php
@@ -23,6 +23,7 @@
 namespace OCA\DAV\Tests\Unit\CardDAV;
 
 use InvalidArgumentException;
+use OCA\DAV\CardDAV\AddressBook;
 use OCA\DAV\CardDAV\CardDavBackend;
 use OCA\DAV\Connector\Sabre\Principal;
 use OCP\IDBConnection;
@@ -247,23 +248,24 @@ class CardDavBackendTest extends TestCase {
 		$books = $this->backend->getAddressBooksForUser(self::UNIT_TEST_USER);
 		$this->assertEquals(1, count($books));
 
-		$this->backend->updateShares('Example', [['href' => 'principal:principals/best-friend']], []);
+		$exampleBook = new AddressBook($this->backend, $books[0]);
+		$this->backend->updateShares($exampleBook, [['href' => 'principal:principals/best-friend']], []);
 
-		$shares = $this->backend->getShares('Example');
+		$shares = $this->backend->getShares($exampleBook->getBookId());
 		$this->assertEquals(1, count($shares));
 
 		// adding the same sharee again has no effect
-		$this->backend->updateShares('Example', [['href' => 'principal:principals/best-friend']], []);
+		$this->backend->updateShares($exampleBook, [['href' => 'principal:principals/best-friend']], []);
 
-		$shares = $this->backend->getShares('Example');
+		$shares = $this->backend->getShares($exampleBook->getBookId());
 		$this->assertEquals(1, count($shares));
 
 		$books = $this->backend->getAddressBooksForUser('principals/best-friend');
 		$this->assertEquals(1, count($books));
 
-		$this->backend->updateShares('Example', [], ['principal:principals/best-friend']);
+		$this->backend->updateShares($exampleBook, [], ['principal:principals/best-friend']);
 
-		$shares = $this->backend->getShares('Example');
+		$shares = $this->backend->getShares($exampleBook->getBookId());
 		$this->assertEquals(0, count($shares));
 
 		$books = $this->backend->getAddressBooksForUser('principals/best-friend');
diff --git a/apps/dav/tests/unit/carddav/sharing/plugintest.php b/apps/dav/tests/unit/carddav/sharing/plugintest.php
index 3dce0fb6083..19ee075fb4f 100644
--- a/apps/dav/tests/unit/carddav/sharing/plugintest.php
+++ b/apps/dav/tests/unit/carddav/sharing/plugintest.php
@@ -74,7 +74,7 @@ class PluginTest extends TestCase {
 		$request = new Request();
 		$request->addHeader('Content-Type', 'application/xml');
 		$request->setUrl('addressbook1.vcf');
-		$request->setBody('<?xml version="1.0" encoding="utf-8" ?><CS:share xmlns:D="DAV:" xmlns:CS="urn:ietf:params:xml:ns:carddav"><CS:set><D:href>principal:principals/admin</D:href><CS:read-write/></CS:set> <CS:remove><D:href>mailto:wilfredo@example.com</D:href></CS:remove></CS:share>');
+		$request->setBody('<?xml version="1.0" encoding="utf-8" ?><CS:share xmlns:D="DAV:" xmlns:CS="http://owncloud.org/ns"><CS:set><D:href>principal:principals/admin</D:href><CS:read-write/></CS:set> <CS:remove><D:href>mailto:wilfredo@example.com</D:href></CS:remove></CS:share>');
 		$response = new Response();
 		$this->plugin->httpPost($request, $response);
 	}
diff --git a/apps/dav/tests/unit/connector/sabre/principal.php b/apps/dav/tests/unit/connector/sabre/principal.php
index e0b459495b6..d6bc7cd405f 100644
--- a/apps/dav/tests/unit/connector/sabre/principal.php
+++ b/apps/dav/tests/unit/connector/sabre/principal.php
@@ -23,21 +23,28 @@
 
 namespace OCA\DAV\Tests\Unit\Connector\Sabre;
 
+use OCP\IGroupManager;
 use \Sabre\DAV\PropPatch;
 use OCP\IUserManager;
-use OCP\IConfig;
+use Test\TestCase;
 
-class Principal extends \Test\TestCase {
-	/** @var IUserManager */
+class Principal extends TestCase {
+	/** @var IUserManager | \PHPUnit_Framework_MockObject_MockObject */
 	private $userManager;
 	/** @var \OCA\DAV\Connector\Sabre\Principal */
 	private $connector;
+	/** @var IGroupManager | \PHPUnit_Framework_MockObject_MockObject */
+	private $groupManager;
 
 	public function setUp() {
 		$this->userManager = $this->getMockBuilder('\OCP\IUserManager')
 			->disableOriginalConstructor()->getMock();
+		$this->groupManager = $this->getMockBuilder('\OCP\IGroupManager')
+			->disableOriginalConstructor()->getMock();
 
-		$this->connector = new \OCA\DAV\Connector\Sabre\Principal($this->userManager);
+		$this->connector = new \OCA\DAV\Connector\Sabre\Principal(
+			$this->userManager,
+			$this->groupManager);
 		parent::setUp();
 	}
 
@@ -195,15 +202,14 @@ class Principal extends \Test\TestCase {
 	public function testGetGroupMembership() {
 		$fooUser = $this->getMockBuilder('\OC\User\User')
 			->disableOriginalConstructor()->getMock();
-		$fooUser
-			->expects($this->exactly(1))
-			->method('getUID')
-			->will($this->returnValue('foo'));
 		$this->userManager
 			->expects($this->once())
 			->method('get')
 			->with('foo')
-			->will($this->returnValue($fooUser));
+			->willReturn($fooUser);
+		$this->groupManager
+			->method('getUserGroups')
+			->willReturn([]);
 
 		$expectedResponse = [
 			'principals/users/foo/calendar-proxy-read',