nextcloud / server

		$dn = $ldapRecord['dn'][0];

		$user = $this->access->userManager->get($dn);

		if(!$user instanceof User) {

			Util::writeLog('user_ldap',

				'LDAP Login: Could not get user object for DN ' . $dn .

				'. Maybe the LDAP entry has no set display name attribute?',

				ILogger::WARN);

			return false;

		}

		if($user->getUsername() !== false) {

			//are the credentials OK?

			if(!$this->access->areCredentialsValid($dn, $password)) {

		$this->initPagedSearch($filter, array($dn), array($attribute), $maxResults, 0);

		$dn = $this->helper->DNasBaseParameter($dn);

		$rr = @$this->invokeLDAPMethod('read', $cr, $dn, $filter, array($attribute));

		if (!$this->ldap->isResource($rr)) {

			if ($attribute !== '') {

				//do not throw this message on userExists check, irritates

				\OCP\Util::writeLog('user_ldap', 'readAttribute failed for DN ' . $dn, ILogger::DEBUG);

			}

			//in case an error occurs , e.g. object does not exist

			return false;

		}

		if ($attribute === '' && ($filter === 'objectclass=*' || $this->invokeLDAPMethod('countEntries', $cr, $rr) === 1)) {

			\OCP\Util::writeLog('user_ldap', 'readAttribute: ' . $dn . ' found', ILogger::DEBUG);

			return true;