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Validate reshare permissions against actual path that the user tries to share #27820

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Validate reshare permissions against actual path that the user tries to share #27820

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b5bf60f
Validate reshare permissions against actual path that the user tries …
juliusknorr Jul 6, 2021
70845cf
Fix tests to use the proper node of the user creating the share
juliusknorr Sep 14, 2021
62f507e
Add test case
juliusknorr Oct 20, 2021
a6c557c
Match against share target and node path
juliusknorr Oct 28, 2021
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10 changes: 6 additions & 4 deletions apps/files_sharing/tests/ApiTest.php
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Original file line number Diff line number Diff line change
Expand Up @@ -510,8 +510,9 @@ public function testGetShareFromSourceWithReshares() {
->setPermissions(19);
$share1 = $this->shareManager->createShare($share1);

$node2 = \OC::$server->getUserFolder(self::TEST_FILES_SHARING_API_USER2)->get($this->filename);
$share2 = $this->shareManager->newShare();
$share2->setNode($node)
$share2->setNode($node2)
->setSharedBy(self::TEST_FILES_SHARING_API_USER2)
->setSharedWith(self::TEST_FILES_SHARING_API_USER3)
->setShareType(IShare::TYPE_USER)
Expand Down Expand Up @@ -633,7 +634,7 @@ public function testGetShareFromFolderReshares() {
$share1->setStatus(IShare::STATUS_ACCEPTED);
$this->shareManager->updateShare($share1);

$node2 = $this->userFolder->get($this->folder.'/'.$this->filename);
$node2 = \OC::$server->getUserFolder(self::TEST_FILES_SHARING_API_USER2)->get($this->folder.'/'.$this->filename);
$share2 = $this->shareManager->newShare();
$share2->setNode($node2)
->setSharedBy(self::TEST_FILES_SHARING_API_USER2)
Expand All @@ -643,7 +644,7 @@ public function testGetShareFromFolderReshares() {
$share2->setStatus(IShare::STATUS_ACCEPTED);
$this->shareManager->updateShare($share2);

$node3 = $this->userFolder->get($this->folder.'/'.$this->subfolder.'/'.$this->filename);
$node3 = \OC::$server->getUserFolder(self::TEST_FILES_SHARING_API_USER2)->get($this->folder.'/'.$this->subfolder.'/'.$this->filename);
$share3 = $this->shareManager->newShare();
$share3->setNode($node3)
->setSharedBy(self::TEST_FILES_SHARING_API_USER2)
Expand Down Expand Up @@ -824,8 +825,9 @@ public function testGetShareMultipleSharedFolder() {
$share2->setStatus(IShare::STATUS_ACCEPTED);
$this->shareManager->updateShare($share2);

$node2 = \OC::$server->getUserFolder(self::TEST_FILES_SHARING_API_USER2)->get($this->folder . $this->subfolder);
$share3 = $this->shareManager->newShare();
$share3->setNode($node1)
$share3->setNode($node2)
->setSharedBy(self::TEST_FILES_SHARING_API_USER2)
->setShareType(IShare::TYPE_LINK)
->setPermissions(1);
Expand Down
30 changes: 30 additions & 0 deletions build/integration/sharing_features/sharing-v1-part3.feature
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Expand Up @@ -472,6 +472,36 @@ Feature: sharing
Then the OCS status code should be "404"
And the HTTP status code should be "200"

Scenario: do allow to create links on a shared folder with two mountpoints
Given As an "admin"
And user "user0" exists
And user "user1" exists
And group "group1" exists
And user "user1" belongs to group "group1"
And user "user0" created a folder "/TMP"
And user "user0" created a folder "/TMP/SUB"
And As an "user0"
And creating a share with
| path | TMP |
| shareType | 1 |
| shareWith | group1 |
| permissions | 15 |
When As an "user1"
And accepting last share
And As an "user0"
And creating a share with
| path | TMP/SUB |
| shareType | 0 |
| shareWith | user1 |
| permissions | 31 |
When As an "user1"
And accepting last share
And creating a share with
| path | TMP/SUB |
| shareType | 3 |
Then the OCS status code should be "100"
And the HTTP status code should be "200"

Scenario: deleting file out of a share as recipient creates a backup for the owner
Given As an "admin"
And user "user0" exists
Expand Down
13 changes: 11 additions & 2 deletions lib/private/Share20/Manager.php
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Original file line number Diff line number Diff line change
Expand Up @@ -52,6 +52,7 @@
use OCP\Files\IRootFolder;
use OCP\Files\Mount\IMountManager;
use OCP\Files\Node;
use OCP\Files\NotFoundException;
use OCP\HintException;
use OCP\IConfig;
use OCP\IGroupManager;
Expand Down Expand Up @@ -292,10 +293,18 @@ protected function generalCreateChecks(IShare $share) {
$permissions = 0;

if (!$isFederatedShare && $share->getNode()->getOwner() && $share->getNode()->getOwner()->getUID() !== $share->getSharedBy()) {
$userMounts = array_filter($userFolder->getById($share->getNode()->getId()), function ($mount) {
try {
$targetNode = $share->getTarget() ? $userFolder->get($share->getTarget()) : null;
} catch (NotFoundException $e) {
$targetNode = null;
}
$userMounts = array_filter($userFolder->getById($share->getNode()->getId()), function ($mount) use ($share, $targetNode) {
// We need to filter since there might be other mountpoints that contain the file
// e.g. if the user has access to the same external storage that the file is originating from
return $mount->getStorage()->instanceOfStorage(ISharedStorage::class);
return $mount->getStorage()->instanceOfStorage(ISharedStorage::class) && (
$targetNode ? $targetNode->getPath() === $mount->getPath() :
$mount->getPath() === $share->getNode()->getPath()
);
});
$userMount = array_shift($userMounts);
if ($userMount === null) {
Expand Down