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[stable29] Fix federated reshares #58993

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[stable29] Fix federated reshares #58993

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8993af6
fix(federatedfilesharing): Do not set the share id for an existing share
provokateurin Mar 3, 2026
49a2354
fix(dav): Use share initiator to get the share node, because the owne…
provokateurin Mar 3, 2026
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11 changes: 5 additions & 6 deletions apps/dav/appinfo/v1/publicwebdav.php
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Original file line number Diff line number Diff line change
Expand Up @@ -82,7 +82,6 @@
}

$share = $authBackend->getShare();
$owner = $share->getShareOwner();
$isReadable = $share->getPermissions() & \OCP\Constants::PERMISSION_READ;
$fileId = $share->getNodeId();

Expand All @@ -97,18 +96,18 @@
\OC\Files\Filesystem::logWarningWhenAddingStorageWrapper($previousLog);

OC_Util::tearDownFS();
OC_Util::setupFS($owner);
$ownerView = new \OC\Files\View('/'. $owner . '/files');
$path = $ownerView->getPath($fileId);
$fileInfo = $ownerView->getFileInfo($path);
OC_Util::setupFS($share->getSharedBy());
$initiatorView = new \OC\Files\View('/'. $share->getSharedBy() . '/files');
$path = $initiatorView->getPath($fileId);
$fileInfo = $initiatorView->getFileInfo($path);
$linkCheckPlugin->setFileInfo($fileInfo);

// If not readable (files_drop) enable the filesdrop plugin
if (!$isReadable) {
$filesDropPlugin->enable();
}

$view = new \OC\Files\View($ownerView->getAbsolutePath($path));
$view = new \OC\Files\View($initiatorView->getAbsolutePath($path));
$filesDropPlugin->setView($view);

return $view;
Expand Down
11 changes: 5 additions & 6 deletions apps/dav/appinfo/v2/publicremote.php
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Original file line number Diff line number Diff line change
Expand Up @@ -108,7 +108,6 @@
}

$share = $authBackend->getShare();
$owner = $share->getShareOwner();
$isReadable = $share->getPermissions() & \OCP\Constants::PERMISSION_READ;
$fileId = $share->getNodeId();

Expand All @@ -130,10 +129,10 @@
Filesystem::logWarningWhenAddingStorageWrapper($previousLog);

OC_Util::tearDownFS();
OC_Util::setupFS($owner);
$ownerView = new View('/'. $owner . '/files');
$path = $ownerView->getPath($fileId);
$fileInfo = $ownerView->getFileInfo($path);
OC_Util::setupFS($share->getSharedBy());
$initiatorView = new View('/'. $share->getSharedBy() . '/files');
$path = $initiatorView->getPath($fileId);
$fileInfo = $initiatorView->getFileInfo($path);

if ($fileInfo === false) {
throw new NotFound();
Expand All @@ -146,7 +145,7 @@
$filesDropPlugin->enable();
}

$view = new View($ownerView->getAbsolutePath($path));
$view = new View($initiatorView->getAbsolutePath($path));
$filesDropPlugin->setView($view);

return $view;
Expand Down
2 changes: 1 addition & 1 deletion apps/dav/lib/Files/Sharing/PublicLinkCheckPlugin.php
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Original file line number Diff line number Diff line change
Expand Up @@ -57,7 +57,7 @@ public function initialize(\Sabre\DAV\Server $server) {
}

public function beforeMethod(RequestInterface $request, ResponseInterface $response) {
// verify that the owner didn't have his share permissions revoked
// verify that the initiator didn't have their share permissions revoked
if ($this->fileInfo && !$this->fileInfo->isShareable()) {
throw new NotFound();
}
Expand Down
87 changes: 24 additions & 63 deletions apps/federatedfilesharing/lib/FederatedShareProvider.php
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Original file line number Diff line number Diff line change
Expand Up @@ -160,30 +160,29 @@
$share->setSharedWith($cloudId->getId());

try {
$remoteShare = $this->getShareFromExternalShareTable($share);
$remoteShare = $this->getShareFromExternalShareTable($share->getShareOwner(), $share->getTarget());
} catch (ShareNotFound $e) {
$remoteShare = null;
}

if ($remoteShare) {
try {
$ownerCloudId = $this->cloudIdManager->getCloudId($remoteShare['owner'], $remoteShare['remote']);
$shareId = $this->addShareToDB($itemSource, $itemType, $shareWith, $sharedBy, $ownerCloudId->getId(), $permissions, 'tmp_token_' . time(), $shareType, $expirationDate);
$share->setId($shareId);
[$token, $remoteId] = $this->askOwnerToReShare($shareWith, $share, $shareId);
// remote share was create successfully if we get a valid token as return
$send = is_string($token) && $token !== '';
} catch (\Exception $e) {
// fall back to old re-share behavior if the remote server
// doesn't support flat re-shares (was introduced with Nextcloud 9.1)
$this->removeShareFromTable($share);
$shareId = $this->createFederatedShare($share);
}
if ($send) {
$ownerCloudId = $this->cloudIdManager->getCloudId($remoteShare['owner'], $remoteShare['remote']);
$shareId = $this->addShareToDB($itemSource, $itemType, $shareWith, $sharedBy, $ownerCloudId->getId(), $permissions, 'tmp_token_' . time(), $shareType, $expirationDate);
[$token, $remoteId] = $this->notifications->requestReShare(

Check notice

Code scanning / Psalm

PossiblyInvalidArrayAccess Note

Cannot access array value on non-array variable of type false

Check notice

Code scanning / Psalm

PossiblyInvalidArrayAccess Note

Cannot access array value on non-array variable of type false
$remoteShare['share_token'],
$remoteShare['remote_id'],
$shareId,

Check notice

Code scanning / Psalm

InvalidArgument Note

Argument 3 of OCA\FederatedFileSharing\Notifications::requestReShare expects string, but int provided
$remoteShare['remote'],
$shareWith,
$permissions,
$share->getNode()->getName(),
);
// remote share was create successfully if we get a valid token as return
if (is_string($token) && $token !== '') {
$this->updateSuccessfulReshare($shareId, $token);
$this->storeRemoteId($shareId, $remoteId);
} else {
$this->removeShareFromTable($share);
$this->removeShareFromTable($shareId);
$message_t = $this->l->t('File is already shared with %s', [$shareWith]);
throw new \Exception($message_t);
}
Expand Down Expand Up @@ -250,7 +249,7 @@
}

if ($failure) {
$this->removeShareFromTableById($shareId);
$this->removeShareFromTable($shareId);
$message_t = $this->l->t('Sharing %1$s failed, could not find %2$s, maybe the server is currently unreachable or uses a self-signed certificate.',
[$share->getNode()->getName(), $share->getSharedWith()]);
throw new \Exception($message_t);
Expand All @@ -259,45 +258,18 @@
return $shareId;
}

/**
* @param string $shareWith
* @param IShare $share
* @param string $shareId internal share Id
* @return array
* @throws \Exception
*/
protected function askOwnerToReShare($shareWith, IShare $share, $shareId) {
$remoteShare = $this->getShareFromExternalShareTable($share);
$token = $remoteShare['share_token'];
$remoteId = $remoteShare['remote_id'];
$remote = $remoteShare['remote'];

[$token, $remoteId] = $this->notifications->requestReShare(
$token,
$remoteId,
$shareId,
$remote,
$shareWith,
$share->getPermissions(),
$share->getNode()->getName()
);

return [$token, $remoteId];
}

/**
* get federated share from the share_external table but exclude mounted link shares
*
* @param IShare $share
* @return array
* @throws ShareNotFound
*/
protected function getShareFromExternalShareTable(IShare $share) {
protected function getShareFromExternalShareTable(string $owner, string $target) {
$query = $this->dbConnection->getQueryBuilder();
$query->select('*')->from($this->externalShareTable)
->where($query->expr()->eq('user', $query->createNamedParameter($share->getShareOwner())))
->andWhere($query->expr()->eq('mountpoint', $query->createNamedParameter($share->getTarget())));
$qResult = $query->execute();
->where($query->expr()->eq('user', $query->createNamedParameter($owner)))
->andWhere($query->expr()->eq('mountpoint', $query->createNamedParameter($target)));
$qResult = $query->executeQuery();
$result = $qResult->fetchAll();
$qResult->closeCursor();

Expand All @@ -319,7 +291,7 @@
* @param int $permissions
* @param string $token
* @param int $shareType
* @param \DateTime $expirationDate
* @param ?\DateTime $expirationDate
* @return int
*/
private function addShareToDB($itemSource, $itemType, $shareWith, $sharedBy, $uidOwner, $permissions, $token, $shareType, $expirationDate) {
Expand Down Expand Up @@ -505,7 +477,7 @@

// only remove the share when all messages are send to not lose information
// about the share to early
$this->removeShareFromTable($share);
$this->removeShareFromTable((int)$share->getId());
}

/**
Expand Down Expand Up @@ -536,20 +508,9 @@
}

/**
* remove share from table
*
* @param IShare $share
*/
public function removeShareFromTable(IShare $share) {
$this->removeShareFromTableById($share->getId());
}

/**
* remove share from table
*
* @param string $shareId
* Remove share from table.
*/
private function removeShareFromTableById($shareId) {
public function removeShareFromTable(int $shareId): void {
$qb = $this->dbConnection->getQueryBuilder();
$qb->delete('share')
->where($qb->expr()->eq('id', $qb->createNamedParameter($shareId)))
Expand Down
6 changes: 3 additions & 3 deletions apps/federatedfilesharing/lib/OCM/CloudFederationProviderFiles.php
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Original file line number Diff line number Diff line change
Expand Up @@ -399,8 +399,8 @@ protected function shareDeclined($id, array $notification) {
* @param IShare $share
* @throws ShareNotFound
*/
protected function executeDeclineShare(IShare $share) {
$this->federatedShareProvider->removeShareFromTable($share);
protected function executeDeclineShare(IShare $share): void {
$this->federatedShareProvider->removeShareFromTable((int)$share->getId());

try {
$fileId = (int)$share->getNode()->getId();
Expand Down Expand Up @@ -437,7 +437,7 @@ private function undoReshare($id, array $notification) {
$share = $this->federatedShareProvider->getShareById($id);

$this->verifyShare($share, $token);
$this->federatedShareProvider->removeShareFromTable($share);
$this->federatedShareProvider->removeShareFromTable((int)$share->getId());
return [];
}

Expand Down
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