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<?php |
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declare(strict_types=1); |
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/** |
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* @copyright Copyright (c) 2018, Roeland Jago Douma <[email protected]> |
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* |
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* @author Joas Schilling <[email protected]> |
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* @author Julius Härtl <[email protected]> |
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* @author Roeland Jago Douma <[email protected]> |
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* |
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* @license GNU AGPL version 3 or any later version |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License as |
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* published by the Free Software Foundation, either version 3 of the |
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* License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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*/ |
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namespace OCA\DAV\CardDAV; |
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use OCA\DAV\Exception\UnsupportedLimitOnInitialSyncException; |
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use OCA\Federation\TrustedServers; |
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use OCP\Accounts\IAccountManager; |
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use OCP\IConfig; |
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use OCP\IL10N; |
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use OCP\IRequest; |
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use Sabre\CardDAV\Backend\SyncSupport; |
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use Sabre\CardDAV\Backend\BackendInterface; |
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use Sabre\CardDAV\Card; |
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use Sabre\DAV\Exception\Forbidden; |
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use Sabre\DAV\Exception\NotFound; |
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use Sabre\VObject\Component\VCard; |
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use Sabre\VObject\Reader; |
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class SystemAddressbook extends AddressBook { |
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/** @var IConfig */ |
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private $config; |
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private ?TrustedServers $trustedServers; |
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private ?IRequest $request; |
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public function __construct(BackendInterface $carddavBackend, array $addressBookInfo, IL10N $l10n, IConfig $config, ?IRequest $request = null, ?TrustedServers $trustedServers = null) { |
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parent::__construct($carddavBackend, $addressBookInfo, $l10n); |
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$this->config = $config; |
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$this->request = $request; |
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$this->trustedServers = $trustedServers; |
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} |
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public function getChildren(): array { |
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$shareEnumeration = $this->config->getAppValue('core', 'shareapi_allow_share_dialog_user_enumeration', 'yes') === 'yes'; |
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$shareEnumerationGroup = $this->config->getAppValue('core', 'shareapi_restrict_user_enumeration_to_group', 'no') === 'yes'; |
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$shareEnumerationPhone = $this->config->getAppValue('core', 'shareapi_restrict_user_enumeration_to_phone', 'no') === 'yes'; |
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if (!$shareEnumeration || $shareEnumerationGroup || $shareEnumerationPhone) { |
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return []; |
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} |
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return parent::getChildren(); |
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} |
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/** |
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* @param array $paths |
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* @return Card[] |
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* @throws NotFound |
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*/ |
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public function getMultipleChildren($paths): array { |
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if (!$this->isFederation()) { |
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return parent::getMultipleChildren($paths); |
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} |
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$objs = $this->carddavBackend->getMultipleCards($this->addressBookInfo['id'], $paths); |
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$children = []; |
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/** @var array $obj */ |
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foreach ($objs as $obj) { |
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if (empty($obj)) { |
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continue; |
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} |
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$carddata = $this->extractCarddata($obj); |
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if (empty($carddata)) { |
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continue; |
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} else { |
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$obj['carddata'] = $carddata; |
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} |
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$children[] = new Card($this->carddavBackend, $this->addressBookInfo, $obj); |
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} |
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return $children; |
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} |
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/** |
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* @param string $name |
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* @return Card |
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* @throws NotFound |
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* @throws Forbidden |
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*/ |
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public function getChild($name): Card { |
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if (!$this->isFederation()) { |
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return parent::getChild($name); |
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} |
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$obj = $this->carddavBackend->getCard($this->addressBookInfo['id'], $name); |
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if (!$obj) { |
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throw new NotFound('Card not found'); |
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} |
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$carddata = $this->extractCarddata($obj); |
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if (empty($carddata)) { |
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throw new Forbidden(); |
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} else { |
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$obj['carddata'] = $carddata; |
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} |
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return new Card($this->carddavBackend, $this->addressBookInfo, $obj); |
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} |
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/** |
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* @throws UnsupportedLimitOnInitialSyncException |
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*/ |
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public function getChanges($syncToken, $syncLevel, $limit = null) { |
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if (!$syncToken && $limit) { |
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throw new UnsupportedLimitOnInitialSyncException(); |
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} |
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if (!$this->carddavBackend instanceof SyncSupport) { |
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return null; |
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} |
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if (!$this->isFederation()) { |
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return parent::getChanges($syncToken, $syncLevel, $limit); |
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} |
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$changed = $this->carddavBackend->getChangesForAddressBook( |
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$this->addressBookInfo['id'], |
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$syncToken, |
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$syncLevel, |
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$limit |
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); |
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if (empty($changed)) { |
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return $changed; |
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} |
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$added = $modified = $deleted = []; |
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foreach ($changed['added'] as $uri) { |
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try { |
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$this->getChild($uri); |
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$added[] = $uri; |
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} catch (NotFound | Forbidden $e) { |
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$deleted[] = $uri; |
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} |
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} |
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foreach ($changed['modified'] as $uri) { |
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try { |
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$this->getChild($uri); |
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$modified[] = $uri; |
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} catch (NotFound | Forbidden $e) { |
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$deleted[] = $uri; |
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} |
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} |
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$changed['added'] = $added; |
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$changed['modified'] = $modified; |
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$changed['deleted'] = $deleted; |
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return $changed; |
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} |
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private function isFederation(): bool { |
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if ($this->trustedServers === null || $this->request === null) { |
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return false; |
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} |
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/** @psalm-suppress NoInterfaceProperties */ |
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if ($this->request->server['PHP_AUTH_USER'] !== 'system') { |
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return false; |
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} |
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/** @psalm-suppress NoInterfaceProperties */ |
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$sharedSecret = $this->request->server['PHP_AUTH_PW']; |
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if ($sharedSecret === null) { |
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return false; |
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} |
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$servers = $this->trustedServers->getServers(); |
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$trusted = array_filter($servers, function ($trustedServer) use ($sharedSecret) { |
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return $trustedServer['shared_secret'] === $sharedSecret; |
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}); |
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// Authentication is fine, but it's not for a federated share |
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if (empty($trusted)) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* If the validation doesn't work the card is "not found" so we |
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* return empty carddata even if the carddata might exist in the local backend. |
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* This can happen when a user sets the required properties |
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* FN, N to a local scope only but the request is from |
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* a federated share. |
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* |
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* @see https://github.com/nextcloud/server/issues/38042 |
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* |
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* @param array $obj |
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* @return string|null |
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*/ |
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private function extractCarddata(array $obj): ?string { |
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$obj['acl'] = $this->getChildACL(); |
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$cardData = $obj['carddata']; |
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/** @var VCard $vCard */ |
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$vCard = Reader::read($cardData); |
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foreach ($vCard->children() as $child) { |
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$scope = $child->offsetGet('X-NC-SCOPE'); |
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if ($scope !== null && $scope->getValue() === IAccountManager::SCOPE_LOCAL) { |
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$vCard->remove($child); |
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} |
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} |
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$messages = $vCard->validate(); |
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if (!empty($messages)) { |
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return null; |
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} |
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return $vCard->serialize(); |
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} |
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} |
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nextcloud /
server
Loading history...
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.