nextcloud / server

lib/private/Share20/Manager.php

Indentation +1982 added lines, -1982 removed lines

@@ -59,2003 +59,2003 @@
  */
 class Manager implements IManager {
 
-	private ?IL10N $l;
-	private LegacyHooks $legacyHooks;
-
-	public function __construct(
-		private LoggerInterface $logger,
-		private IConfig $config,
-		private ISecureRandom $secureRandom,
-		private IHasher $hasher,
-		private IMountManager $mountManager,
-		private IGroupManager $groupManager,
-		private IFactory $l10nFactory,
-		private IProviderFactory $factory,
-		private IUserManager $userManager,
-		private IRootFolder $rootFolder,
-		private IMailer $mailer,
-		private IURLGenerator $urlGenerator,
-		private \OC_Defaults $defaults,
-		private IEventDispatcher $dispatcher,
-		private IUserSession $userSession,
-		private KnownUserService $knownUserService,
-		private ShareDisableChecker $shareDisableChecker,
-		private IDateTimeZone $dateTimeZone,
-		private IAppConfig $appConfig,
-	) {
-		$this->l = $this->l10nFactory->get('lib');
-		// The constructor of LegacyHooks registers the listeners of share events
-		// do not remove if those are not properly migrated
-		$this->legacyHooks = new LegacyHooks($this->dispatcher);
-	}
-
-	/**
-	 * Convert from a full share id to a tuple (providerId, shareId)
-	 *
-	 * @param string $id
-	 * @return string[]
-	 */
-	private function splitFullId($id) {
-		return explode(':', $id, 2);
-	}
-
-	/**
-	 * Verify if a password meets all requirements
-	 *
-	 * @param string $password
-	 * @throws HintException
-	 */
-	protected function verifyPassword($password) {
-		if ($password === null) {
-			// No password is set, check if this is allowed.
-			if ($this->shareApiLinkEnforcePassword()) {
-				throw new \InvalidArgumentException($this->l->t('Passwords are enforced for link and mail shares'));
-			}
-
-			return;
-		}
-
-		// Let others verify the password
-		try {
-			$event = new ValidatePasswordPolicyEvent($password, PasswordContext::SHARING);
-			$this->dispatcher->dispatchTyped($event);
-		} catch (HintException $e) {
-			/* Wrap in a 400 bad request error */
-			throw new HintException($e->getMessage(), $e->getHint(), 400, $e);
-		}
-	}
-
-	/**
-	 * Check for generic requirements before creating a share
-	 *
-	 * @param IShare $share
-	 * @throws \InvalidArgumentException
-	 * @throws GenericShareException
-	 *
-	 * @suppress PhanUndeclaredClassMethod
-	 */
-	protected function generalCreateChecks(IShare $share, bool $isUpdate = false) {
-		if ($share->getShareType() === IShare::TYPE_USER) {
-			// We expect a valid user as sharedWith for user shares
-			if (!$this->userManager->userExists($share->getSharedWith())) {
-				throw new \InvalidArgumentException($this->l->t('Share recipient is not a valid user'));
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_GROUP) {
-			// We expect a valid group as sharedWith for group shares
-			if (!$this->groupManager->groupExists($share->getSharedWith())) {
-				throw new \InvalidArgumentException($this->l->t('Share recipient is not a valid group'));
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_LINK) {
-			// No check for TYPE_EMAIL here as we have a recipient for them
-			if ($share->getSharedWith() !== null) {
-				throw new \InvalidArgumentException($this->l->t('Share recipient should be empty'));
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_EMAIL) {
-			if ($share->getSharedWith() === null) {
-				throw new \InvalidArgumentException($this->l->t('Share recipient should not be empty'));
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_REMOTE) {
-			if ($share->getSharedWith() === null) {
-				throw new \InvalidArgumentException($this->l->t('Share recipient should not be empty'));
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_REMOTE_GROUP) {
-			if ($share->getSharedWith() === null) {
-				throw new \InvalidArgumentException($this->l->t('Share recipient should not be empty'));
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_CIRCLE) {
-			$circle = \OCA\Circles\Api\v1\Circles::detailsCircle($share->getSharedWith());
-			if ($circle === null) {
-				throw new \InvalidArgumentException($this->l->t('Share recipient is not a valid circle'));
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_ROOM) {
-		} elseif ($share->getShareType() === IShare::TYPE_DECK) {
-		} elseif ($share->getShareType() === IShare::TYPE_SCIENCEMESH) {
-		} else {
-			// We cannot handle other types yet
-			throw new \InvalidArgumentException($this->l->t('Unknown share type'));
-		}
-
-		// Verify the initiator of the share is set
-		if ($share->getSharedBy() === null) {
-			throw new \InvalidArgumentException($this->l->t('Share initiator must be set'));
-		}
-
-		// Cannot share with yourself
-		if ($share->getShareType() === IShare::TYPE_USER &&
-			$share->getSharedWith() === $share->getSharedBy()) {
-			throw new \InvalidArgumentException($this->l->t('Cannot share with yourself'));
-		}
-
-		// The path should be set
-		if ($share->getNode() === null) {
-			throw new \InvalidArgumentException($this->l->t('Shared path must be set'));
-		}
-
-		// And it should be a file or a folder
-		if (!($share->getNode() instanceof \OCP\Files\File) &&
-			!($share->getNode() instanceof \OCP\Files\Folder)) {
-			throw new \InvalidArgumentException($this->l->t('Shared path must be either a file or a folder'));
-		}
-
-		// And you cannot share your rootfolder
-		if ($this->userManager->userExists($share->getSharedBy())) {
-			$userFolder = $this->rootFolder->getUserFolder($share->getSharedBy());
-		} else {
-			$userFolder = $this->rootFolder->getUserFolder($share->getShareOwner());
-		}
-		if ($userFolder->getId() === $share->getNode()->getId()) {
-			throw new \InvalidArgumentException($this->l->t('You cannot share your root folder'));
-		}
-
-		// Check if we actually have share permissions
-		if (!$share->getNode()->isShareable()) {
-			throw new GenericShareException($this->l->t('You are not allowed to share %s', [$share->getNode()->getName()]), code: 404);
-		}
-
-		// Permissions should be set
-		if ($share->getPermissions() === null) {
-			throw new \InvalidArgumentException($this->l->t('Valid permissions are required for sharing'));
-		}
-
-		// Permissions must be valid
-		if ($share->getPermissions() < 0 || $share->getPermissions() > \OCP\Constants::PERMISSION_ALL) {
-			throw new \InvalidArgumentException($this->l->t('Valid permissions are required for sharing'));
-		}
-
-		// Single file shares should never have delete or create permissions
-		if (($share->getNode() instanceof File)
-			&& (($share->getPermissions() & (\OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_DELETE)) !== 0)) {
-			throw new \InvalidArgumentException($this->l->t('File shares cannot have create or delete permissions'));
-		}
-
-		$permissions = 0;
-		$nodesForUser = $userFolder->getById($share->getNodeId());
-		foreach ($nodesForUser as $node) {
-			if ($node->getInternalPath() === '' && !$node->getMountPoint() instanceof MoveableMount) {
-				// for the root of non-movable mount, the permissions we see if limited by the mount itself,
-				// so we instead use the "raw" permissions from the storage
-				$permissions |= $node->getStorage()->getPermissions('');
-			} else {
-				$permissions |= $node->getPermissions();
-			}
-		}
-
-		// Check that we do not share with more permissions than we have
-		if ($share->getPermissions() & ~$permissions) {
-			$path = $userFolder->getRelativePath($share->getNode()->getPath());
-			throw new GenericShareException($this->l->t('Cannot increase permissions of %s', [$path]), code: 404);
-		}
-
-		// Check that read permissions are always set
-		// Link shares are allowed to have no read permissions to allow upload to hidden folders
-		$noReadPermissionRequired = $share->getShareType() === IShare::TYPE_LINK
-			|| $share->getShareType() === IShare::TYPE_EMAIL;
-		if (!$noReadPermissionRequired &&
-			($share->getPermissions() & \OCP\Constants::PERMISSION_READ) === 0) {
-			throw new \InvalidArgumentException($this->l->t('Shares need at least read permissions'));
-		}
-
-		if ($share->getNode() instanceof \OCP\Files\File) {
-			if ($share->getPermissions() & \OCP\Constants::PERMISSION_DELETE) {
-				throw new GenericShareException($this->l->t('Files cannot be shared with delete permissions'));
-			}
-			if ($share->getPermissions() & \OCP\Constants::PERMISSION_CREATE) {
-				throw new GenericShareException($this->l->t('Files cannot be shared with create permissions'));
-			}
-		}
-	}
-
-	/**
-	 * Validate if the expiration date fits the system settings
-	 *
-	 * @param IShare $share The share to validate the expiration date of
-	 * @return IShare The modified share object
-	 * @throws GenericShareException
-	 * @throws \InvalidArgumentException
-	 * @throws \Exception
-	 */
-	protected function validateExpirationDateInternal(IShare $share) {
-		$isRemote = $share->getShareType() === IShare::TYPE_REMOTE || $share->getShareType() === IShare::TYPE_REMOTE_GROUP;
-
-		$expirationDate = $share->getExpirationDate();
-
-		if ($isRemote) {
-			$defaultExpireDate = $this->shareApiRemoteDefaultExpireDate();
-			$defaultExpireDays = $this->shareApiRemoteDefaultExpireDays();
-			$configProp = 'remote_defaultExpDays';
-			$isEnforced = $this->shareApiRemoteDefaultExpireDateEnforced();
-		} else {
-			$defaultExpireDate = $this->shareApiInternalDefaultExpireDate();
-			$defaultExpireDays = $this->shareApiInternalDefaultExpireDays();
-			$configProp = 'internal_defaultExpDays';
-			$isEnforced = $this->shareApiInternalDefaultExpireDateEnforced();
-		}
-
-		// If $expirationDate is falsy, noExpirationDate is true and expiration not enforced
-		// Then skip expiration date validation as null is accepted
-		if (!$share->getNoExpirationDate() || $isEnforced) {
-			if ($expirationDate !== null) {
-				$expirationDate->setTimezone($this->dateTimeZone->getTimeZone());
-				$expirationDate->setTime(0, 0, 0);
-
-				$date = new \DateTime('now', $this->dateTimeZone->getTimeZone());
-				$date->setTime(0, 0, 0);
-				if ($date >= $expirationDate) {
-					throw new GenericShareException($this->l->t('Expiration date is in the past'), code: 404);
-				}
-			}
-
-			// If expiredate is empty set a default one if there is a default
-			$fullId = null;
-			try {
-				$fullId = $share->getFullId();
-			} catch (\UnexpectedValueException $e) {
-				// This is a new share
-			}
-
-			if ($fullId === null && $expirationDate === null && $defaultExpireDate) {
-				$expirationDate = new \DateTime('now', $this->dateTimeZone->getTimeZone());
-				$expirationDate->setTime(0, 0, 0);
-				$days = (int)$this->config->getAppValue('core', $configProp, (string)$defaultExpireDays);
-				if ($days > $defaultExpireDays) {
-					$days = $defaultExpireDays;
-				}
-				$expirationDate->add(new \DateInterval('P' . $days . 'D'));
-			}
-
-			// If we enforce the expiration date check that is does not exceed
-			if ($isEnforced) {
-				if (empty($expirationDate)) {
-					throw new \InvalidArgumentException($this->l->t('Expiration date is enforced'));
-				}
-
-				$date = new \DateTime('now', $this->dateTimeZone->getTimeZone());
-				$date->setTime(0, 0, 0);
-				$date->add(new \DateInterval('P' . $defaultExpireDays . 'D'));
-				if ($date < $expirationDate) {
-					throw new GenericShareException($this->l->n('Cannot set expiration date more than %n day in the future', 'Cannot set expiration date more than %n days in the future', $defaultExpireDays), code: 404);
-				}
-			}
-		}
-
-		$accepted = true;
-		$message = '';
-		\OCP\Util::emitHook('\OC\Share', 'verifyExpirationDate', [
-			'expirationDate' => &$expirationDate,
-			'accepted' => &$accepted,
-			'message' => &$message,
-			'passwordSet' => $share->getPassword() !== null,
-		]);
-
-		if (!$accepted) {
-			throw new \Exception($message);
-		}
-
-		$share->setExpirationDate($expirationDate);
-
-		return $share;
-	}
-
-	/**
-	 * Validate if the expiration date fits the system settings
-	 *
-	 * @param IShare $share The share to validate the expiration date of
-	 * @return IShare The modified share object
-	 * @throws GenericShareException
-	 * @throws \InvalidArgumentException
-	 * @throws \Exception
-	 */
-	protected function validateExpirationDateLink(IShare $share) {
-		$expirationDate = $share->getExpirationDate();
-		$isEnforced = $this->shareApiLinkDefaultExpireDateEnforced();
-
-		// If $expirationDate is falsy, noExpirationDate is true and expiration not enforced
-		// Then skip expiration date validation as null is accepted
-		if (!($share->getNoExpirationDate() && !$isEnforced)) {
-			if ($expirationDate !== null) {
-				$expirationDate->setTimezone($this->dateTimeZone->getTimeZone());
-				$expirationDate->setTime(0, 0, 0);
-
-				$date = new \DateTime('now', $this->dateTimeZone->getTimeZone());
-				$date->setTime(0, 0, 0);
-				if ($date >= $expirationDate) {
-					throw new GenericShareException($this->l->t('Expiration date is in the past'), code: 404);
-				}
-			}
-
-			// If expiredate is empty set a default one if there is a default
-			$fullId = null;
-			try {
-				$fullId = $share->getFullId();
-			} catch (\UnexpectedValueException $e) {
-				// This is a new share
-			}
-
-			if ($fullId === null && $expirationDate === null && $this->shareApiLinkDefaultExpireDate()) {
-				$expirationDate = new \DateTime('now', $this->dateTimeZone->getTimeZone());
-				$expirationDate->setTime(0, 0, 0);
-
-				$days = (int)$this->config->getAppValue('core', 'link_defaultExpDays', (string)$this->shareApiLinkDefaultExpireDays());
-				if ($days > $this->shareApiLinkDefaultExpireDays()) {
-					$days = $this->shareApiLinkDefaultExpireDays();
-				}
-				$expirationDate->add(new \DateInterval('P' . $days . 'D'));
-			}
-
-			// If we enforce the expiration date check that is does not exceed
-			if ($isEnforced) {
-				if (empty($expirationDate)) {
-					throw new \InvalidArgumentException($this->l->t('Expiration date is enforced'));
-				}
-
-				$date = new \DateTime('now', $this->dateTimeZone->getTimeZone());
-				$date->setTime(0, 0, 0);
-				$date->add(new \DateInterval('P' . $this->shareApiLinkDefaultExpireDays() . 'D'));
-				if ($date < $expirationDate) {
-					throw new GenericShareException(
-						$this->l->n('Cannot set expiration date more than %n day in the future', 'Cannot set expiration date more than %n days in the future', $this->shareApiLinkDefaultExpireDays()),
-						code: 404,
-					);
-				}
-			}
-
-		}
-
-		$accepted = true;
-		$message = '';
-		\OCP\Util::emitHook('\OC\Share', 'verifyExpirationDate', [
-			'expirationDate' => &$expirationDate,
-			'accepted' => &$accepted,
-			'message' => &$message,
-			'passwordSet' => $share->getPassword() !== null,
-		]);
-
-		if (!$accepted) {
-			throw new \Exception($message);
-		}
-
-		$share->setExpirationDate($expirationDate);
-
-		return $share;
-	}
-
-	/**
-	 * Check for pre share requirements for user shares
-	 *
-	 * @param IShare $share
-	 * @throws \Exception
-	 */
-	protected function userCreateChecks(IShare $share) {
-		// Check if we can share with group members only
-		if ($this->shareWithGroupMembersOnly()) {
-			$sharedBy = $this->userManager->get($share->getSharedBy());
-			$sharedWith = $this->userManager->get($share->getSharedWith());
-			// Verify we can share with this user
-			$groups = array_intersect(
-				$this->groupManager->getUserGroupIds($sharedBy),
-				$this->groupManager->getUserGroupIds($sharedWith)
-			);
-
-			// optional excluded groups
-			$excludedGroups = $this->shareWithGroupMembersOnlyExcludeGroupsList();
-			$groups = array_diff($groups, $excludedGroups);
-
-			if (empty($groups)) {
-				throw new \Exception($this->l->t('Sharing is only allowed with group members'));
-			}
-		}
-
-		/*
+    private ?IL10N $l;
+    private LegacyHooks $legacyHooks;
+
+    public function __construct(
+        private LoggerInterface $logger,
+        private IConfig $config,
+        private ISecureRandom $secureRandom,
+        private IHasher $hasher,
+        private IMountManager $mountManager,
+        private IGroupManager $groupManager,
+        private IFactory $l10nFactory,
+        private IProviderFactory $factory,
+        private IUserManager $userManager,
+        private IRootFolder $rootFolder,
+        private IMailer $mailer,
+        private IURLGenerator $urlGenerator,
+        private \OC_Defaults $defaults,
+        private IEventDispatcher $dispatcher,
+        private IUserSession $userSession,
+        private KnownUserService $knownUserService,
+        private ShareDisableChecker $shareDisableChecker,
+        private IDateTimeZone $dateTimeZone,
+        private IAppConfig $appConfig,
+    ) {
+        $this->l = $this->l10nFactory->get('lib');
+        // The constructor of LegacyHooks registers the listeners of share events
+        // do not remove if those are not properly migrated
+        $this->legacyHooks = new LegacyHooks($this->dispatcher);
+    }
+
+    /**
+     * Convert from a full share id to a tuple (providerId, shareId)
+     *
+     * @param string $id
+     * @return string[]
+     */
+    private function splitFullId($id) {
+        return explode(':', $id, 2);
+    }
+
+    /**
+     * Verify if a password meets all requirements
+     *
+     * @param string $password
+     * @throws HintException
+     */
+    protected function verifyPassword($password) {
+        if ($password === null) {
+            // No password is set, check if this is allowed.
+            if ($this->shareApiLinkEnforcePassword()) {
+                throw new \InvalidArgumentException($this->l->t('Passwords are enforced for link and mail shares'));
+            }
+
+            return;
+        }
+
+        // Let others verify the password
+        try {
+            $event = new ValidatePasswordPolicyEvent($password, PasswordContext::SHARING);
+            $this->dispatcher->dispatchTyped($event);
+        } catch (HintException $e) {
+            /* Wrap in a 400 bad request error */
+            throw new HintException($e->getMessage(), $e->getHint(), 400, $e);
+        }
+    }
+
+    /**
+     * Check for generic requirements before creating a share
+     *
+     * @param IShare $share
+     * @throws \InvalidArgumentException
+     * @throws GenericShareException
+     *
+     * @suppress PhanUndeclaredClassMethod
+     */
+    protected function generalCreateChecks(IShare $share, bool $isUpdate = false) {
+        if ($share->getShareType() === IShare::TYPE_USER) {
+            // We expect a valid user as sharedWith for user shares
+            if (!$this->userManager->userExists($share->getSharedWith())) {
+                throw new \InvalidArgumentException($this->l->t('Share recipient is not a valid user'));
+            }
+        } elseif ($share->getShareType() === IShare::TYPE_GROUP) {
+            // We expect a valid group as sharedWith for group shares
+            if (!$this->groupManager->groupExists($share->getSharedWith())) {
+                throw new \InvalidArgumentException($this->l->t('Share recipient is not a valid group'));
+            }
+        } elseif ($share->getShareType() === IShare::TYPE_LINK) {
+            // No check for TYPE_EMAIL here as we have a recipient for them
+            if ($share->getSharedWith() !== null) {
+                throw new \InvalidArgumentException($this->l->t('Share recipient should be empty'));
+            }
+        } elseif ($share->getShareType() === IShare::TYPE_EMAIL) {
+            if ($share->getSharedWith() === null) {
+                throw new \InvalidArgumentException($this->l->t('Share recipient should not be empty'));
+            }
+        } elseif ($share->getShareType() === IShare::TYPE_REMOTE) {
+            if ($share->getSharedWith() === null) {
+                throw new \InvalidArgumentException($this->l->t('Share recipient should not be empty'));
+            }
+        } elseif ($share->getShareType() === IShare::TYPE_REMOTE_GROUP) {
+            if ($share->getSharedWith() === null) {
+                throw new \InvalidArgumentException($this->l->t('Share recipient should not be empty'));
+            }
+        } elseif ($share->getShareType() === IShare::TYPE_CIRCLE) {
+            $circle = \OCA\Circles\Api\v1\Circles::detailsCircle($share->getSharedWith());
+            if ($circle === null) {
+                throw new \InvalidArgumentException($this->l->t('Share recipient is not a valid circle'));
+            }
+        } elseif ($share->getShareType() === IShare::TYPE_ROOM) {
+        } elseif ($share->getShareType() === IShare::TYPE_DECK) {
+        } elseif ($share->getShareType() === IShare::TYPE_SCIENCEMESH) {
+        } else {
+            // We cannot handle other types yet
+            throw new \InvalidArgumentException($this->l->t('Unknown share type'));
+        }
+
+        // Verify the initiator of the share is set
+        if ($share->getSharedBy() === null) {
+            throw new \InvalidArgumentException($this->l->t('Share initiator must be set'));
+        }
+
+        // Cannot share with yourself
+        if ($share->getShareType() === IShare::TYPE_USER &&
+            $share->getSharedWith() === $share->getSharedBy()) {
+            throw new \InvalidArgumentException($this->l->t('Cannot share with yourself'));
+        }
+
+        // The path should be set
+        if ($share->getNode() === null) {
+            throw new \InvalidArgumentException($this->l->t('Shared path must be set'));
+        }
+
+        // And it should be a file or a folder
+        if (!($share->getNode() instanceof \OCP\Files\File) &&
+            !($share->getNode() instanceof \OCP\Files\Folder)) {
+            throw new \InvalidArgumentException($this->l->t('Shared path must be either a file or a folder'));
+        }
+
+        // And you cannot share your rootfolder
+        if ($this->userManager->userExists($share->getSharedBy())) {
+            $userFolder = $this->rootFolder->getUserFolder($share->getSharedBy());
+        } else {
+            $userFolder = $this->rootFolder->getUserFolder($share->getShareOwner());
+        }
+        if ($userFolder->getId() === $share->getNode()->getId()) {
+            throw new \InvalidArgumentException($this->l->t('You cannot share your root folder'));
+        }
+
+        // Check if we actually have share permissions
+        if (!$share->getNode()->isShareable()) {
+            throw new GenericShareException($this->l->t('You are not allowed to share %s', [$share->getNode()->getName()]), code: 404);
+        }
+
+        // Permissions should be set
+        if ($share->getPermissions() === null) {
+            throw new \InvalidArgumentException($this->l->t('Valid permissions are required for sharing'));
+        }
+
+        // Permissions must be valid
+        if ($share->getPermissions() < 0 || $share->getPermissions() > \OCP\Constants::PERMISSION_ALL) {
+            throw new \InvalidArgumentException($this->l->t('Valid permissions are required for sharing'));
+        }
+
+        // Single file shares should never have delete or create permissions
+        if (($share->getNode() instanceof File)
+            && (($share->getPermissions() & (\OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_DELETE)) !== 0)) {
+            throw new \InvalidArgumentException($this->l->t('File shares cannot have create or delete permissions'));
+        }
+
+        $permissions = 0;
+        $nodesForUser = $userFolder->getById($share->getNodeId());
+        foreach ($nodesForUser as $node) {
+            if ($node->getInternalPath() === '' && !$node->getMountPoint() instanceof MoveableMount) {
+                // for the root of non-movable mount, the permissions we see if limited by the mount itself,
+                // so we instead use the "raw" permissions from the storage
+                $permissions |= $node->getStorage()->getPermissions('');
+            } else {
+                $permissions |= $node->getPermissions();
+            }
+        }
+
+        // Check that we do not share with more permissions than we have
+        if ($share->getPermissions() & ~$permissions) {
+            $path = $userFolder->getRelativePath($share->getNode()->getPath());
+            throw new GenericShareException($this->l->t('Cannot increase permissions of %s', [$path]), code: 404);
+        }
+
+        // Check that read permissions are always set
+        // Link shares are allowed to have no read permissions to allow upload to hidden folders
+        $noReadPermissionRequired = $share->getShareType() === IShare::TYPE_LINK
+            || $share->getShareType() === IShare::TYPE_EMAIL;
+        if (!$noReadPermissionRequired &&
+            ($share->getPermissions() & \OCP\Constants::PERMISSION_READ) === 0) {
+            throw new \InvalidArgumentException($this->l->t('Shares need at least read permissions'));
+        }
+
+        if ($share->getNode() instanceof \OCP\Files\File) {
+            if ($share->getPermissions() & \OCP\Constants::PERMISSION_DELETE) {
+                throw new GenericShareException($this->l->t('Files cannot be shared with delete permissions'));
+            }
+            if ($share->getPermissions() & \OCP\Constants::PERMISSION_CREATE) {
+                throw new GenericShareException($this->l->t('Files cannot be shared with create permissions'));
+            }
+        }
+    }
+
+    /**
+     * Validate if the expiration date fits the system settings
+     *
+     * @param IShare $share The share to validate the expiration date of
+     * @return IShare The modified share object
+     * @throws GenericShareException
+     * @throws \InvalidArgumentException
+     * @throws \Exception
+     */
+    protected function validateExpirationDateInternal(IShare $share) {
+        $isRemote = $share->getShareType() === IShare::TYPE_REMOTE || $share->getShareType() === IShare::TYPE_REMOTE_GROUP;
+
+        $expirationDate = $share->getExpirationDate();
+
+        if ($isRemote) {
+            $defaultExpireDate = $this->shareApiRemoteDefaultExpireDate();
+            $defaultExpireDays = $this->shareApiRemoteDefaultExpireDays();
+            $configProp = 'remote_defaultExpDays';
+            $isEnforced = $this->shareApiRemoteDefaultExpireDateEnforced();
+        } else {
+            $defaultExpireDate = $this->shareApiInternalDefaultExpireDate();
+            $defaultExpireDays = $this->shareApiInternalDefaultExpireDays();
+            $configProp = 'internal_defaultExpDays';
+            $isEnforced = $this->shareApiInternalDefaultExpireDateEnforced();
+        }
+
+        // If $expirationDate is falsy, noExpirationDate is true and expiration not enforced
+        // Then skip expiration date validation as null is accepted
+        if (!$share->getNoExpirationDate() || $isEnforced) {
+            if ($expirationDate !== null) {
+                $expirationDate->setTimezone($this->dateTimeZone->getTimeZone());
+                $expirationDate->setTime(0, 0, 0);
+
+                $date = new \DateTime('now', $this->dateTimeZone->getTimeZone());
+                $date->setTime(0, 0, 0);
+                if ($date >= $expirationDate) {
+                    throw new GenericShareException($this->l->t('Expiration date is in the past'), code: 404);
+                }
+            }
+
+            // If expiredate is empty set a default one if there is a default
+            $fullId = null;
+            try {
+                $fullId = $share->getFullId();
+            } catch (\UnexpectedValueException $e) {
+                // This is a new share
+            }
+
+            if ($fullId === null && $expirationDate === null && $defaultExpireDate) {
+                $expirationDate = new \DateTime('now', $this->dateTimeZone->getTimeZone());
+                $expirationDate->setTime(0, 0, 0);
+                $days = (int)$this->config->getAppValue('core', $configProp, (string)$defaultExpireDays);
+                if ($days > $defaultExpireDays) {
+                    $days = $defaultExpireDays;
+                }
+                $expirationDate->add(new \DateInterval('P' . $days . 'D'));
+            }
+
+            // If we enforce the expiration date check that is does not exceed
+            if ($isEnforced) {
+                if (empty($expirationDate)) {
+                    throw new \InvalidArgumentException($this->l->t('Expiration date is enforced'));
+                }
+
+                $date = new \DateTime('now', $this->dateTimeZone->getTimeZone());
+                $date->setTime(0, 0, 0);
+                $date->add(new \DateInterval('P' . $defaultExpireDays . 'D'));
+                if ($date < $expirationDate) {
+                    throw new GenericShareException($this->l->n('Cannot set expiration date more than %n day in the future', 'Cannot set expiration date more than %n days in the future', $defaultExpireDays), code: 404);
+                }
+            }
+        }
+
+        $accepted = true;
+        $message = '';
+        \OCP\Util::emitHook('\OC\Share', 'verifyExpirationDate', [
+            'expirationDate' => &$expirationDate,
+            'accepted' => &$accepted,
+            'message' => &$message,
+            'passwordSet' => $share->getPassword() !== null,
+        ]);
+
+        if (!$accepted) {
+            throw new \Exception($message);
+        }
+
+        $share->setExpirationDate($expirationDate);
+
+        return $share;
+    }
+
+    /**
+     * Validate if the expiration date fits the system settings
+     *
+     * @param IShare $share The share to validate the expiration date of
+     * @return IShare The modified share object
+     * @throws GenericShareException
+     * @throws \InvalidArgumentException
+     * @throws \Exception
+     */
+    protected function validateExpirationDateLink(IShare $share) {
+        $expirationDate = $share->getExpirationDate();
+        $isEnforced = $this->shareApiLinkDefaultExpireDateEnforced();
+
+        // If $expirationDate is falsy, noExpirationDate is true and expiration not enforced
+        // Then skip expiration date validation as null is accepted
+        if (!($share->getNoExpirationDate() && !$isEnforced)) {
+            if ($expirationDate !== null) {
+                $expirationDate->setTimezone($this->dateTimeZone->getTimeZone());
+                $expirationDate->setTime(0, 0, 0);
+
+                $date = new \DateTime('now', $this->dateTimeZone->getTimeZone());
+                $date->setTime(0, 0, 0);
+                if ($date >= $expirationDate) {
+                    throw new GenericShareException($this->l->t('Expiration date is in the past'), code: 404);
+                }
+            }
+
+            // If expiredate is empty set a default one if there is a default
+            $fullId = null;
+            try {
+                $fullId = $share->getFullId();
+            } catch (\UnexpectedValueException $e) {
+                // This is a new share
+            }
+
+            if ($fullId === null && $expirationDate === null && $this->shareApiLinkDefaultExpireDate()) {
+                $expirationDate = new \DateTime('now', $this->dateTimeZone->getTimeZone());
+                $expirationDate->setTime(0, 0, 0);
+
+                $days = (int)$this->config->getAppValue('core', 'link_defaultExpDays', (string)$this->shareApiLinkDefaultExpireDays());
+                if ($days > $this->shareApiLinkDefaultExpireDays()) {
+                    $days = $this->shareApiLinkDefaultExpireDays();
+                }
+                $expirationDate->add(new \DateInterval('P' . $days . 'D'));
+            }
+
+            // If we enforce the expiration date check that is does not exceed
+            if ($isEnforced) {
+                if (empty($expirationDate)) {
+                    throw new \InvalidArgumentException($this->l->t('Expiration date is enforced'));
+                }
+
+                $date = new \DateTime('now', $this->dateTimeZone->getTimeZone());
+                $date->setTime(0, 0, 0);
+                $date->add(new \DateInterval('P' . $this->shareApiLinkDefaultExpireDays() . 'D'));
+                if ($date < $expirationDate) {
+                    throw new GenericShareException(
+                        $this->l->n('Cannot set expiration date more than %n day in the future', 'Cannot set expiration date more than %n days in the future', $this->shareApiLinkDefaultExpireDays()),
+                        code: 404,
+                    );
+                }
+            }
+
+        }
+
+        $accepted = true;
+        $message = '';
+        \OCP\Util::emitHook('\OC\Share', 'verifyExpirationDate', [
+            'expirationDate' => &$expirationDate,
+            'accepted' => &$accepted,
+            'message' => &$message,
+            'passwordSet' => $share->getPassword() !== null,
+        ]);
+
+        if (!$accepted) {
+            throw new \Exception($message);
+        }
+
+        $share->setExpirationDate($expirationDate);
+
+        return $share;
+    }
+
+    /**
+     * Check for pre share requirements for user shares
+     *
+     * @param IShare $share
+     * @throws \Exception
+     */
+    protected function userCreateChecks(IShare $share) {
+        // Check if we can share with group members only
+        if ($this->shareWithGroupMembersOnly()) {
+            $sharedBy = $this->userManager->get($share->getSharedBy());
+            $sharedWith = $this->userManager->get($share->getSharedWith());
+            // Verify we can share with this user
+            $groups = array_intersect(
+                $this->groupManager->getUserGroupIds($sharedBy),
+                $this->groupManager->getUserGroupIds($sharedWith)
+            );
+
+            // optional excluded groups
+            $excludedGroups = $this->shareWithGroupMembersOnlyExcludeGroupsList();
+            $groups = array_diff($groups, $excludedGroups);
+
+            if (empty($groups)) {
+                throw new \Exception($this->l->t('Sharing is only allowed with group members'));
+            }
+        }
+
+        /*
 		 * TODO: Could be costly, fix
 		 *
 		 * Also this is not what we want in the future.. then we want to squash identical shares.
 		 */
-		$provider = $this->factory->getProviderForType(IShare::TYPE_USER);
-		$existingShares = $provider->getSharesByPath($share->getNode());
-		foreach ($existingShares as $existingShare) {
-			// Ignore if it is the same share
-			try {
-				if ($existingShare->getFullId() === $share->getFullId()) {
-					continue;
-				}
-			} catch (\UnexpectedValueException $e) {
-				//Shares are not identical
-			}
-
-			// Identical share already exists
-			if ($existingShare->getSharedWith() === $share->getSharedWith() && $existingShare->getShareType() === $share->getShareType()) {
-				throw new AlreadySharedException($this->l->t('Sharing %s failed, because this item is already shared with the account %s', [$share->getNode()->getName(), $share->getSharedWithDisplayName()]), $existingShare);
-			}
-
-			// The share is already shared with this user via a group share
-			if ($existingShare->getShareType() === IShare::TYPE_GROUP) {
-				$group = $this->groupManager->get($existingShare->getSharedWith());
-				if (!is_null($group)) {
-					$user = $this->userManager->get($share->getSharedWith());
-
-					if ($group->inGroup($user) && $existingShare->getShareOwner() !== $share->getShareOwner()) {
-						throw new AlreadySharedException($this->l->t('Sharing %s failed, because this item is already shared with the account %s', [$share->getNode()->getName(), $share->getSharedWithDisplayName()]), $existingShare);
-					}
-				}
-			}
-		}
-	}
-
-	/**
-	 * Check for pre share requirements for group shares
-	 *
-	 * @param IShare $share
-	 * @throws \Exception
-	 */
-	protected function groupCreateChecks(IShare $share) {
-		// Verify group shares are allowed
-		if (!$this->allowGroupSharing()) {
-			throw new \Exception($this->l->t('Group sharing is now allowed'));
-		}
-
-		// Verify if the user can share with this group
-		if ($this->shareWithGroupMembersOnly()) {
-			$sharedBy = $this->userManager->get($share->getSharedBy());
-			$sharedWith = $this->groupManager->get($share->getSharedWith());
-
-			// optional excluded groups
-			$excludedGroups = $this->shareWithGroupMembersOnlyExcludeGroupsList();
-			if (is_null($sharedWith) || in_array($share->getSharedWith(), $excludedGroups) || !$sharedWith->inGroup($sharedBy)) {
-				throw new \Exception($this->l->t('Sharing is only allowed within your own groups'));
-			}
-		}
-
-		/*
+        $provider = $this->factory->getProviderForType(IShare::TYPE_USER);
+        $existingShares = $provider->getSharesByPath($share->getNode());
+        foreach ($existingShares as $existingShare) {
+            // Ignore if it is the same share
+            try {
+                if ($existingShare->getFullId() === $share->getFullId()) {
+                    continue;
+                }
+            } catch (\UnexpectedValueException $e) {
+                //Shares are not identical
+            }
+
+            // Identical share already exists
+            if ($existingShare->getSharedWith() === $share->getSharedWith() && $existingShare->getShareType() === $share->getShareType()) {
+                throw new AlreadySharedException($this->l->t('Sharing %s failed, because this item is already shared with the account %s', [$share->getNode()->getName(), $share->getSharedWithDisplayName()]), $existingShare);
+            }
+
+            // The share is already shared with this user via a group share
+            if ($existingShare->getShareType() === IShare::TYPE_GROUP) {
+                $group = $this->groupManager->get($existingShare->getSharedWith());
+                if (!is_null($group)) {
+                    $user = $this->userManager->get($share->getSharedWith());
+
+                    if ($group->inGroup($user) && $existingShare->getShareOwner() !== $share->getShareOwner()) {
+                        throw new AlreadySharedException($this->l->t('Sharing %s failed, because this item is already shared with the account %s', [$share->getNode()->getName(), $share->getSharedWithDisplayName()]), $existingShare);
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Check for pre share requirements for group shares
+     *
+     * @param IShare $share
+     * @throws \Exception
+     */
+    protected function groupCreateChecks(IShare $share) {
+        // Verify group shares are allowed
+        if (!$this->allowGroupSharing()) {
+            throw new \Exception($this->l->t('Group sharing is now allowed'));
+        }
+
+        // Verify if the user can share with this group
+        if ($this->shareWithGroupMembersOnly()) {
+            $sharedBy = $this->userManager->get($share->getSharedBy());
+            $sharedWith = $this->groupManager->get($share->getSharedWith());
+
+            // optional excluded groups
+            $excludedGroups = $this->shareWithGroupMembersOnlyExcludeGroupsList();
+            if (is_null($sharedWith) || in_array($share->getSharedWith(), $excludedGroups) || !$sharedWith->inGroup($sharedBy)) {
+                throw new \Exception($this->l->t('Sharing is only allowed within your own groups'));
+            }
+        }
+
+        /*
 		 * TODO: Could be costly, fix
 		 *
 		 * Also this is not what we want in the future.. then we want to squash identical shares.
 		 */
-		$provider = $this->factory->getProviderForType(IShare::TYPE_GROUP);
-		$existingShares = $provider->getSharesByPath($share->getNode());
-		foreach ($existingShares as $existingShare) {
-			try {
-				if ($existingShare->getFullId() === $share->getFullId()) {
-					continue;
-				}
-			} catch (\UnexpectedValueException $e) {
-				//It is a new share so just continue
-			}
-
-			if ($existingShare->getSharedWith() === $share->getSharedWith() && $existingShare->getShareType() === $share->getShareType()) {
-				throw new AlreadySharedException($this->l->t('Path is already shared with this group'), $existingShare);
-			}
-		}
-	}
-
-	/**
-	 * Check for pre share requirements for link shares
-	 *
-	 * @param IShare $share
-	 * @throws \Exception
-	 */
-	protected function linkCreateChecks(IShare $share) {
-		// Are link shares allowed?
-		if (!$this->shareApiAllowLinks()) {
-			throw new \Exception($this->l->t('Link sharing is not allowed'));
-		}
-
-		// Check if public upload is allowed
-		if ($share->getNodeType() === 'folder' && !$this->shareApiLinkAllowPublicUpload() &&
-			($share->getPermissions() & (\OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_DELETE))) {
-			throw new \InvalidArgumentException($this->l->t('Public upload is not allowed'));
-		}
-	}
-
-	/**
-	 * To make sure we don't get invisible link shares we set the parent
-	 * of a link if it is a reshare. This is a quick word around
-	 * until we can properly display multiple link shares in the UI
-	 *
-	 * See: https://github.com/owncloud/core/issues/22295
-	 *
-	 * FIXME: Remove once multiple link shares can be properly displayed
-	 *
-	 * @param IShare $share
-	 */
-	protected function setLinkParent(IShare $share) {
-		// No sense in checking if the method is not there.
-		if (method_exists($share, 'setParent')) {
-			$storage = $share->getNode()->getStorage();
-			if ($storage->instanceOfStorage(SharedStorage::class)) {
-				/** @var \OCA\Files_Sharing\SharedStorage $storage */
-				$share->setParent($storage->getShareId());
-			}
-		}
-	}
-
-	/**
-	 * @param File|Folder $path
-	 */
-	protected function pathCreateChecks($path) {
-		// Make sure that we do not share a path that contains a shared mountpoint
-		if ($path instanceof \OCP\Files\Folder) {
-			$mounts = $this->mountManager->findIn($path->getPath());
-			foreach ($mounts as $mount) {
-				if ($mount->getStorage()->instanceOfStorage('\OCA\Files_Sharing\ISharedStorage')) {
-					throw new \InvalidArgumentException($this->l->t('Path contains files shared with you'));
-				}
-			}
-		}
-	}
-
-	/**
-	 * Check if the user that is sharing can actually share
-	 *
-	 * @param IShare $share
-	 * @throws \Exception
-	 */
-	protected function canShare(IShare $share) {
-		if (!$this->shareApiEnabled()) {
-			throw new \Exception($this->l->t('Sharing is disabled'));
-		}
-
-		if ($this->sharingDisabledForUser($share->getSharedBy())) {
-			throw new \Exception($this->l->t('Sharing is disabled for you'));
-		}
-	}
-
-	/**
-	 * Share a path
-	 *
-	 * @param IShare $share
-	 * @return IShare The share object
-	 * @throws \Exception
-	 *
-	 * TODO: handle link share permissions or check them
-	 */
-	public function createShare(IShare $share) {
-		$this->canShare($share);
-
-		$this->generalCreateChecks($share);
-
-		// Verify if there are any issues with the path
-		$this->pathCreateChecks($share->getNode());
-
-		/*
+        $provider = $this->factory->getProviderForType(IShare::TYPE_GROUP);
+        $existingShares = $provider->getSharesByPath($share->getNode());
+        foreach ($existingShares as $existingShare) {
+            try {
+                if ($existingShare->getFullId() === $share->getFullId()) {
+                    continue;
+                }
+            } catch (\UnexpectedValueException $e) {
+                //It is a new share so just continue
+            }
+
+            if ($existingShare->getSharedWith() === $share->getSharedWith() && $existingShare->getShareType() === $share->getShareType()) {
+                throw new AlreadySharedException($this->l->t('Path is already shared with this group'), $existingShare);
+            }
+        }
+    }
+
+    /**
+     * Check for pre share requirements for link shares
+     *
+     * @param IShare $share
+     * @throws \Exception
+     */
+    protected function linkCreateChecks(IShare $share) {
+        // Are link shares allowed?
+        if (!$this->shareApiAllowLinks()) {
+            throw new \Exception($this->l->t('Link sharing is not allowed'));
+        }
+
+        // Check if public upload is allowed
+        if ($share->getNodeType() === 'folder' && !$this->shareApiLinkAllowPublicUpload() &&
+            ($share->getPermissions() & (\OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_DELETE))) {
+            throw new \InvalidArgumentException($this->l->t('Public upload is not allowed'));
+        }
+    }
+
+    /**
+     * To make sure we don't get invisible link shares we set the parent
+     * of a link if it is a reshare. This is a quick word around
+     * until we can properly display multiple link shares in the UI
+     *
+     * See: https://github.com/owncloud/core/issues/22295
+     *
+     * FIXME: Remove once multiple link shares can be properly displayed
+     *
+     * @param IShare $share
+     */
+    protected function setLinkParent(IShare $share) {
+        // No sense in checking if the method is not there.
+        if (method_exists($share, 'setParent')) {
+            $storage = $share->getNode()->getStorage();
+            if ($storage->instanceOfStorage(SharedStorage::class)) {
+                /** @var \OCA\Files_Sharing\SharedStorage $storage */
+                $share->setParent($storage->getShareId());
+            }
+        }
+    }
+
+    /**
+     * @param File|Folder $path
+     */
+    protected function pathCreateChecks($path) {
+        // Make sure that we do not share a path that contains a shared mountpoint
+        if ($path instanceof \OCP\Files\Folder) {
+            $mounts = $this->mountManager->findIn($path->getPath());
+            foreach ($mounts as $mount) {
+                if ($mount->getStorage()->instanceOfStorage('\OCA\Files_Sharing\ISharedStorage')) {
+                    throw new \InvalidArgumentException($this->l->t('Path contains files shared with you'));
+                }
+            }
+        }
+    }
+
+    /**
+     * Check if the user that is sharing can actually share
+     *
+     * @param IShare $share
+     * @throws \Exception
+     */
+    protected function canShare(IShare $share) {
+        if (!$this->shareApiEnabled()) {
+            throw new \Exception($this->l->t('Sharing is disabled'));
+        }
+
+        if ($this->sharingDisabledForUser($share->getSharedBy())) {
+            throw new \Exception($this->l->t('Sharing is disabled for you'));
+        }
+    }
+
+    /**
+     * Share a path
+     *
+     * @param IShare $share
+     * @return IShare The share object
+     * @throws \Exception
+     *
+     * TODO: handle link share permissions or check them
+     */
+    public function createShare(IShare $share) {
+        $this->canShare($share);
+
+        $this->generalCreateChecks($share);
+
+        // Verify if there are any issues with the path
+        $this->pathCreateChecks($share->getNode());
+
+        /*
 		 * On creation of a share the owner is always the owner of the path
 		 * Except for mounted federated shares.
 		 */
-		$storage = $share->getNode()->getStorage();
-		if ($storage->instanceOfStorage('OCA\Files_Sharing\External\Storage')) {
-			$parent = $share->getNode()->getParent();
-			while ($parent->getStorage()->instanceOfStorage('OCA\Files_Sharing\External\Storage')) {
-				$parent = $parent->getParent();
-			}
-			$share->setShareOwner($parent->getOwner()->getUID());
-		} else {
-			if ($share->getNode()->getOwner()) {
-				$share->setShareOwner($share->getNode()->getOwner()->getUID());
-			} else {
-				$share->setShareOwner($share->getSharedBy());
-			}
-		}
-
-		try {
-			// Verify share type
-			if ($share->getShareType() === IShare::TYPE_USER) {
-				$this->userCreateChecks($share);
-
-				// Verify the expiration date
-				$share = $this->validateExpirationDateInternal($share);
-			} elseif ($share->getShareType() === IShare::TYPE_GROUP) {
-				$this->groupCreateChecks($share);
-
-				// Verify the expiration date
-				$share = $this->validateExpirationDateInternal($share);
-			} elseif ($share->getShareType() === IShare::TYPE_REMOTE || $share->getShareType() === IShare::TYPE_REMOTE_GROUP) {
-				// Verify the expiration date
-				$share = $this->validateExpirationDateInternal($share);
-			} elseif ($share->getShareType() === IShare::TYPE_LINK
-				|| $share->getShareType() === IShare::TYPE_EMAIL) {
-				$this->linkCreateChecks($share);
-				$this->setLinkParent($share);
-
-				$token = $this->generateToken();
-				// Set the unique token
-				$share->setToken($token);
-
-				// Verify the expiration date
-				$share = $this->validateExpirationDateLink($share);
-
-				// Verify the password
-				$this->verifyPassword($share->getPassword());
-
-				// If a password is set. Hash it!
-				if ($share->getShareType() === IShare::TYPE_LINK
-					&& $share->getPassword() !== null) {
-					$share->setPassword($this->hasher->hash($share->getPassword()));
-				}
-			}
-
-			// Cannot share with the owner
-			if ($share->getShareType() === IShare::TYPE_USER &&
-				$share->getSharedWith() === $share->getShareOwner()) {
-				throw new \InvalidArgumentException($this->l->t('Cannot share with the share owner'));
-			}
-
-			// Generate the target
-			$defaultShareFolder = $this->config->getSystemValue('share_folder', '/');
-			$allowCustomShareFolder = $this->config->getSystemValueBool('sharing.allow_custom_share_folder', true);
-			if ($allowCustomShareFolder) {
-				$shareFolder = $this->config->getUserValue($share->getSharedWith(), Application::APP_ID, 'share_folder', $defaultShareFolder);
-			} else {
-				$shareFolder = $defaultShareFolder;
-			}
-
-			$target = $shareFolder . '/' . $share->getNode()->getName();
-			$target = \OC\Files\Filesystem::normalizePath($target);
-			$share->setTarget($target);
-
-			// Pre share event
-			$event = new Share\Events\BeforeShareCreatedEvent($share);
-			$this->dispatcher->dispatchTyped($event);
-			if ($event->isPropagationStopped() && $event->getError()) {
-				throw new \Exception($event->getError());
-			}
-
-			$oldShare = $share;
-			$provider = $this->factory->getProviderForType($share->getShareType());
-			$share = $provider->create($share);
-
-			// Reuse the node we already have
-			$share->setNode($oldShare->getNode());
-
-			// Reset the target if it is null for the new share
-			if ($share->getTarget() === '') {
-				$share->setTarget($target);
-			}
-		} catch (AlreadySharedException $e) {
-			// If a share for the same target already exists, dont create a new one,
-			// but do trigger the hooks and notifications again
-			$oldShare = $share;
-
-			// Reuse the node we already have
-			$share = $e->getExistingShare();
-			$share->setNode($oldShare->getNode());
-		}
-
-		// Post share event
-		$this->dispatcher->dispatchTyped(new ShareCreatedEvent($share));
-
-		// Send email if needed
-		if ($this->config->getSystemValueBool('sharing.enable_share_mail', true)) {
-			if ($share->getMailSend()) {
-				$provider = $this->factory->getProviderForType($share->getShareType());
-				if ($provider instanceof IShareProviderWithNotification) {
-					$provider->sendMailNotification($share);
-				} else {
-					$this->logger->debug('Share notification not sent because the provider does not support it.', ['app' => 'share']);
-				}
-			} else {
-				$this->logger->debug('Share notification not sent because mailsend is false.', ['app' => 'share']);
-			}
-		} else {
-			$this->logger->debug('Share notification not sent because sharing notification emails is disabled.', ['app' => 'share']);
-		}
-
-		return $share;
-	}
-
-	/**
-	 * Update a share
-	 *
-	 * @param IShare $share
-	 * @return IShare The share object
-	 * @throws \InvalidArgumentException
-	 * @throws HintException
-	 */
-	public function updateShare(IShare $share, bool $onlyValid = true) {
-		$expirationDateUpdated = false;
-
-		$this->canShare($share);
-
-		try {
-			$originalShare = $this->getShareById($share->getFullId(), onlyValid: $onlyValid);
-		} catch (\UnexpectedValueException $e) {
-			throw new \InvalidArgumentException($this->l->t('Share does not have a full ID'));
-		}
-
-		// We cannot change the share type!
-		if ($share->getShareType() !== $originalShare->getShareType()) {
-			throw new \InvalidArgumentException($this->l->t('Cannot change share type'));
-		}
-
-		// We can only change the recipient on user shares
-		if ($share->getSharedWith() !== $originalShare->getSharedWith() &&
-			$share->getShareType() !== IShare::TYPE_USER) {
-			throw new \InvalidArgumentException($this->l->t('Can only update recipient on user shares'));
-		}
-
-		// Cannot share with the owner
-		if ($share->getShareType() === IShare::TYPE_USER &&
-			$share->getSharedWith() === $share->getShareOwner()) {
-			throw new \InvalidArgumentException($this->l->t('Cannot share with the share owner'));
-		}
-
-		$this->generalCreateChecks($share, true);
-
-		if ($share->getShareType() === IShare::TYPE_USER) {
-			$this->userCreateChecks($share);
-
-			if ($share->getExpirationDate() != $originalShare->getExpirationDate()) {
-				// Verify the expiration date
-				$this->validateExpirationDateInternal($share);
-				$expirationDateUpdated = true;
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_GROUP) {
-			$this->groupCreateChecks($share);
-
-			if ($share->getExpirationDate() != $originalShare->getExpirationDate()) {
-				// Verify the expiration date
-				$this->validateExpirationDateInternal($share);
-				$expirationDateUpdated = true;
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_LINK
-			|| $share->getShareType() === IShare::TYPE_EMAIL) {
-			$this->linkCreateChecks($share);
-
-			// The new password is not set again if it is the same as the old
-			// one, unless when switching from sending by Talk to sending by
-			// mail.
-			$plainTextPassword = $share->getPassword();
-			$updatedPassword = $this->updateSharePasswordIfNeeded($share, $originalShare);
-
-			/**
-			 * Cannot enable the getSendPasswordByTalk if there is no password set
-			 */
-			if (empty($plainTextPassword) && $share->getSendPasswordByTalk()) {
-				throw new \InvalidArgumentException($this->l->t('Cannot enable sending the password by Talk with an empty password'));
-			}
-
-			/**
-			 * If we're in a mail share, we need to force a password change
-			 * as either the user is not aware of the password or is already (received by mail)
-			 * Thus the SendPasswordByTalk feature would not make sense
-			 */
-			if (!$updatedPassword && $share->getShareType() === IShare::TYPE_EMAIL) {
-				if (!$originalShare->getSendPasswordByTalk() && $share->getSendPasswordByTalk()) {
-					throw new \InvalidArgumentException($this->l->t('Cannot enable sending the password by Talk without setting a new password'));
-				}
-				if ($originalShare->getSendPasswordByTalk() && !$share->getSendPasswordByTalk()) {
-					throw new \InvalidArgumentException($this->l->t('Cannot disable sending the password by Talk without setting a new password'));
-				}
-			}
-
-			if ($share->getExpirationDate() != $originalShare->getExpirationDate()) {
-				// Verify the expiration date
-				$this->validateExpirationDateLink($share);
-				$expirationDateUpdated = true;
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_REMOTE || $share->getShareType() === IShare::TYPE_REMOTE_GROUP) {
-			if ($share->getExpirationDate() != $originalShare->getExpirationDate()) {
-				// Verify the expiration date
-				$this->validateExpirationDateInternal($share);
-				$expirationDateUpdated = true;
-			}
-		}
-
-		$this->pathCreateChecks($share->getNode());
-
-		// Now update the share!
-		$provider = $this->factory->getProviderForType($share->getShareType());
-		if ($share->getShareType() === IShare::TYPE_EMAIL) {
-			$share = $provider->update($share, $plainTextPassword);
-		} else {
-			$share = $provider->update($share);
-		}
-
-		if ($expirationDateUpdated === true) {
-			\OC_Hook::emit(Share::class, 'post_set_expiration_date', [
-				'itemType' => $share->getNode() instanceof \OCP\Files\File ? 'file' : 'folder',
-				'itemSource' => $share->getNode()->getId(),
-				'date' => $share->getExpirationDate(),
-				'uidOwner' => $share->getSharedBy(),
-			]);
-		}
-
-		if ($share->getPassword() !== $originalShare->getPassword()) {
-			\OC_Hook::emit(Share::class, 'post_update_password', [
-				'itemType' => $share->getNode() instanceof \OCP\Files\File ? 'file' : 'folder',
-				'itemSource' => $share->getNode()->getId(),
-				'uidOwner' => $share->getSharedBy(),
-				'token' => $share->getToken(),
-				'disabled' => is_null($share->getPassword()),
-			]);
-		}
-
-		if ($share->getPermissions() !== $originalShare->getPermissions()) {
-			if ($this->userManager->userExists($share->getShareOwner())) {
-				$userFolder = $this->rootFolder->getUserFolder($share->getShareOwner());
-			} else {
-				$userFolder = $this->rootFolder->getUserFolder($share->getSharedBy());
-			}
-			\OC_Hook::emit(Share::class, 'post_update_permissions', [
-				'itemType' => $share->getNode() instanceof \OCP\Files\File ? 'file' : 'folder',
-				'itemSource' => $share->getNode()->getId(),
-				'shareType' => $share->getShareType(),
-				'shareWith' => $share->getSharedWith(),
-				'uidOwner' => $share->getSharedBy(),
-				'permissions' => $share->getPermissions(),
-				'attributes' => $share->getAttributes() !== null ? $share->getAttributes()->toArray() : null,
-				'path' => $userFolder->getRelativePath($share->getNode()->getPath()),
-			]);
-		}
-
-		return $share;
-	}
-
-	/**
-	 * Accept a share.
-	 *
-	 * @param IShare $share
-	 * @param string $recipientId
-	 * @return IShare The share object
-	 * @throws \InvalidArgumentException Thrown if the provider does not implement `IShareProviderSupportsAccept`
-	 * @since 9.0.0
-	 */
-	public function acceptShare(IShare $share, string $recipientId): IShare {
-		[$providerId,] = $this->splitFullId($share->getFullId());
-		$provider = $this->factory->getProvider($providerId);
-
-		if (!($provider instanceof IShareProviderSupportsAccept)) {
-			throw new \InvalidArgumentException($this->l->t('Share provider does not support accepting'));
-		}
-		/** @var IShareProvider&IShareProviderSupportsAccept $provider */
-		$provider->acceptShare($share, $recipientId);
-
-		$event = new ShareAcceptedEvent($share);
-		$this->dispatcher->dispatchTyped($event);
-
-		return $share;
-	}
-
-	/**
-	 * Updates the password of the given share if it is not the same as the
-	 * password of the original share.
-	 *
-	 * @param IShare $share the share to update its password.
-	 * @param IShare $originalShare the original share to compare its
-	 *                              password with.
-	 * @return boolean whether the password was updated or not.
-	 */
-	private function updateSharePasswordIfNeeded(IShare $share, IShare $originalShare) {
-		$passwordsAreDifferent = ($share->getPassword() !== $originalShare->getPassword()) &&
-			(($share->getPassword() !== null && $originalShare->getPassword() === null) ||
-				($share->getPassword() === null && $originalShare->getPassword() !== null) ||
-				($share->getPassword() !== null && $originalShare->getPassword() !== null &&
-					!$this->hasher->verify($share->getPassword(), $originalShare->getPassword())));
-
-		// Password updated.
-		if ($passwordsAreDifferent) {
-			// Verify the password
-			$this->verifyPassword($share->getPassword());
-
-			// If a password is set. Hash it!
-			if (!empty($share->getPassword())) {
-				$share->setPassword($this->hasher->hash($share->getPassword()));
-				if ($share->getShareType() === IShare::TYPE_EMAIL) {
-					// Shares shared by email have temporary passwords
-					$this->setSharePasswordExpirationTime($share);
-				}
-
-				return true;
-			} else {
-				// Empty string and null are seen as NOT password protected
-				$share->setPassword(null);
-				if ($share->getShareType() === IShare::TYPE_EMAIL) {
-					$share->setPasswordExpirationTime(null);
-				}
-				return true;
-			}
-		} else {
-			// Reset the password to the original one, as it is either the same
-			// as the "new" password or a hashed version of it.
-			$share->setPassword($originalShare->getPassword());
-		}
-
-		return false;
-	}
-
-	/**
-	 * Set the share's password expiration time
-	 */
-	private function setSharePasswordExpirationTime(IShare $share): void {
-		if (!$this->config->getSystemValueBool('sharing.enable_mail_link_password_expiration', false)) {
-			// Sets password expiration date to NULL
-			$share->setPasswordExpirationTime();
-			return;
-		}
-		// Sets password expiration date
-		$expirationTime = null;
-		$now = new \DateTime();
-		$expirationInterval = $this->config->getSystemValue('sharing.mail_link_password_expiration_interval', 3600);
-		$expirationTime = $now->add(new \DateInterval('PT' . $expirationInterval . 'S'));
-		$share->setPasswordExpirationTime($expirationTime);
-	}
-
-
-	/**
-	 * Delete all the children of this share
-	 * FIXME: remove once https://github.com/owncloud/core/pull/21660 is in
-	 *
-	 * @param IShare $share
-	 * @return IShare[] List of deleted shares
-	 */
-	protected function deleteChildren(IShare $share) {
-		$deletedShares = [];
-
-		$provider = $this->factory->getProviderForType($share->getShareType());
-
-		foreach ($provider->getChildren($share) as $child) {
-			$this->dispatcher->dispatchTyped(new BeforeShareDeletedEvent($child));
-
-			$deletedChildren = $this->deleteChildren($child);
-			$deletedShares = array_merge($deletedShares, $deletedChildren);
-
-			$provider->delete($child);
-			$this->dispatcher->dispatchTyped(new ShareDeletedEvent($child));
-			$deletedShares[] = $child;
-		}
-
-		return $deletedShares;
-	}
-
-	/** Promote re-shares into direct shares so that target user keeps access */
-	protected function promoteReshares(IShare $share): void {
-		try {
-			$node = $share->getNode();
-		} catch (NotFoundException) {
-			/* Skip if node not found */
-			return;
-		}
-
-		$userIds = [];
-
-		if ($share->getShareType() === IShare::TYPE_USER) {
-			$userIds[] = $share->getSharedWith();
-		} elseif ($share->getShareType() === IShare::TYPE_GROUP) {
-			$group = $this->groupManager->get($share->getSharedWith());
-			$users = $group?->getUsers() ?? [];
-
-			foreach ($users as $user) {
-				/* Skip share owner */
-				if ($user->getUID() === $share->getShareOwner() || $user->getUID() === $share->getSharedBy()) {
-					continue;
-				}
-				$userIds[] = $user->getUID();
-			}
-		} else {
-			/* We only support user and group shares */
-			return;
-		}
-
-		$reshareRecords = [];
-		$shareTypes = [
-			IShare::TYPE_GROUP,
-			IShare::TYPE_USER,
-			IShare::TYPE_LINK,
-			IShare::TYPE_REMOTE,
-			IShare::TYPE_EMAIL,
-		];
-
-		foreach ($userIds as $userId) {
-			foreach ($shareTypes as $shareType) {
-				try {
-					$provider = $this->factory->getProviderForType($shareType);
-				} catch (ProviderException $e) {
-					continue;
-				}
-
-				if ($node instanceof Folder) {
-					/* We need to get all shares by this user to get subshares */
-					$shares = $provider->getSharesBy($userId, $shareType, null, false, -1, 0);
-
-					foreach ($shares as $share) {
-						try {
-							$path = $share->getNode()->getPath();
-						} catch (NotFoundException) {
-							/* Ignore share of non-existing node */
-							continue;
-						}
-						if ($node->getRelativePath($path) !== null) {
-							/* If relative path is not null it means the shared node is the same or in a subfolder */
-							$reshareRecords[] = $share;
-						}
-					}
-				} else {
-					$shares = $provider->getSharesBy($userId, $shareType, $node, false, -1, 0);
-					foreach ($shares as $child) {
-						$reshareRecords[] = $child;
-					}
-				}
-			}
-		}
-
-		foreach ($reshareRecords as $child) {
-			try {
-				/* Check if the share is still valid (means the resharer still has access to the file through another mean) */
-				$this->generalCreateChecks($child);
-			} catch (GenericShareException $e) {
-				/* The check is invalid, promote it to a direct share from the sharer of parent share */
-				$this->logger->debug('Promote reshare because of exception ' . $e->getMessage(), ['exception' => $e, 'fullId' => $child->getFullId()]);
-				try {
-					$child->setSharedBy($share->getSharedBy());
-					$this->updateShare($child);
-				} catch (GenericShareException|\InvalidArgumentException $e) {
-					$this->logger->warning('Failed to promote reshare because of exception ' . $e->getMessage(), ['exception' => $e, 'fullId' => $child->getFullId()]);
-				}
-			}
-		}
-	}
-
-	/**
-	 * Delete a share
-	 *
-	 * @param IShare $share
-	 * @throws ShareNotFound
-	 * @throws \InvalidArgumentException
-	 */
-	public function deleteShare(IShare $share) {
-		try {
-			$share->getFullId();
-		} catch (\UnexpectedValueException $e) {
-			throw new \InvalidArgumentException($this->l->t('Share does not have a full ID'));
-		}
-
-		$this->dispatcher->dispatchTyped(new BeforeShareDeletedEvent($share));
-
-		// Get all children and delete them as well
-		$this->deleteChildren($share);
-
-		// Do the actual delete
-		$provider = $this->factory->getProviderForType($share->getShareType());
-		$provider->delete($share);
-
-		$this->dispatcher->dispatchTyped(new ShareDeletedEvent($share));
-
-		// Promote reshares of the deleted share
-		$this->promoteReshares($share);
-	}
-
-
-	/**
-	 * Unshare a file as the recipient.
-	 * This can be different from a regular delete for example when one of
-	 * the users in a groups deletes that share. But the provider should
-	 * handle this.
-	 *
-	 * @param IShare $share
-	 * @param string $recipientId
-	 */
-	public function deleteFromSelf(IShare $share, $recipientId) {
-		[$providerId,] = $this->splitFullId($share->getFullId());
-		$provider = $this->factory->getProvider($providerId);
-
-		$provider->deleteFromSelf($share, $recipientId);
-		$event = new ShareDeletedFromSelfEvent($share);
-		$this->dispatcher->dispatchTyped($event);
-	}
-
-	public function restoreShare(IShare $share, string $recipientId): IShare {
-		[$providerId,] = $this->splitFullId($share->getFullId());
-		$provider = $this->factory->getProvider($providerId);
-
-		return $provider->restore($share, $recipientId);
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function moveShare(IShare $share, $recipientId) {
-		if ($share->getShareType() === IShare::TYPE_LINK
-			|| $share->getShareType() === IShare::TYPE_EMAIL) {
-			throw new \InvalidArgumentException($this->l->t('Cannot change target of link share'));
-		}
-
-		if ($share->getShareType() === IShare::TYPE_USER && $share->getSharedWith() !== $recipientId) {
-			throw new \InvalidArgumentException($this->l->t('Invalid share recipient'));
-		}
-
-		if ($share->getShareType() === IShare::TYPE_GROUP) {
-			$sharedWith = $this->groupManager->get($share->getSharedWith());
-			if (is_null($sharedWith)) {
-				throw new \InvalidArgumentException($this->l->t('Group "%s" does not exist', [$share->getSharedWith()]));
-			}
-			$recipient = $this->userManager->get($recipientId);
-			if (!$sharedWith->inGroup($recipient)) {
-				throw new \InvalidArgumentException($this->l->t('Invalid share recipient'));
-			}
-		}
-
-		[$providerId,] = $this->splitFullId($share->getFullId());
-		$provider = $this->factory->getProvider($providerId);
-
-		return $provider->move($share, $recipientId);
-	}
-
-	public function getSharesInFolder($userId, Folder $node, $reshares = false, $shallow = true) {
-		$providers = $this->factory->getAllProviders();
-		if (!$shallow) {
-			throw new \Exception('non-shallow getSharesInFolder is no longer supported');
-		}
-
-		$isOwnerless = $node->getMountPoint() instanceof IShareOwnerlessMount;
-
-		$shares = [];
-		foreach ($providers as $provider) {
-			if ($isOwnerless) {
-				foreach ($node->getDirectoryListing() as $childNode) {
-					$data = $provider->getSharesByPath($childNode);
-					$fid = $childNode->getId();
-					$shares[$fid] ??= [];
-					$shares[$fid] = array_merge($shares[$fid], $data);
-				}
-			} else {
-				foreach ($provider->getSharesInFolder($userId, $node, $reshares) as $fid => $data) {
-					$shares[$fid] ??= [];
-					$shares[$fid] = array_merge($shares[$fid], $data);
-				}
-			}
-		}
-
-		return $shares;
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function getSharesBy($userId, $shareType, $path = null, $reshares = false, $limit = 50, $offset = 0, bool $onlyValid = true) {
-		if ($path !== null &&
-			!($path instanceof \OCP\Files\File) &&
-			!($path instanceof \OCP\Files\Folder)) {
-			throw new \InvalidArgumentException($this->l->t('Invalid path'));
-		}
-
-		try {
-			$provider = $this->factory->getProviderForType($shareType);
-		} catch (ProviderException $e) {
-			return [];
-		}
-
-		if ($path?->getMountPoint() instanceof IShareOwnerlessMount) {
-			$shares = array_filter($provider->getSharesByPath($path), static fn (IShare $share) => $share->getShareType() === $shareType);
-		} else {
-			$shares = $provider->getSharesBy($userId, $shareType, $path, $reshares, $limit, $offset);
-		}
-
-		/*
+        $storage = $share->getNode()->getStorage();
+        if ($storage->instanceOfStorage('OCA\Files_Sharing\External\Storage')) {
+            $parent = $share->getNode()->getParent();
+            while ($parent->getStorage()->instanceOfStorage('OCA\Files_Sharing\External\Storage')) {
+                $parent = $parent->getParent();
+            }
+            $share->setShareOwner($parent->getOwner()->getUID());
+        } else {
+            if ($share->getNode()->getOwner()) {
+                $share->setShareOwner($share->getNode()->getOwner()->getUID());
+            } else {
+                $share->setShareOwner($share->getSharedBy());
+            }
+        }
+
+        try {
+            // Verify share type
+            if ($share->getShareType() === IShare::TYPE_USER) {
+                $this->userCreateChecks($share);
+
+                // Verify the expiration date
+                $share = $this->validateExpirationDateInternal($share);
+            } elseif ($share->getShareType() === IShare::TYPE_GROUP) {
+                $this->groupCreateChecks($share);
+
+                // Verify the expiration date
+                $share = $this->validateExpirationDateInternal($share);
+            } elseif ($share->getShareType() === IShare::TYPE_REMOTE || $share->getShareType() === IShare::TYPE_REMOTE_GROUP) {
+                // Verify the expiration date
+                $share = $this->validateExpirationDateInternal($share);
+            } elseif ($share->getShareType() === IShare::TYPE_LINK
+                || $share->getShareType() === IShare::TYPE_EMAIL) {
+                $this->linkCreateChecks($share);
+                $this->setLinkParent($share);
+
+                $token = $this->generateToken();
+                // Set the unique token
+                $share->setToken($token);
+
+                // Verify the expiration date
+                $share = $this->validateExpirationDateLink($share);
+
+                // Verify the password
+                $this->verifyPassword($share->getPassword());
+
+                // If a password is set. Hash it!
+                if ($share->getShareType() === IShare::TYPE_LINK
+                    && $share->getPassword() !== null) {
+                    $share->setPassword($this->hasher->hash($share->getPassword()));
+                }
+            }
+
+            // Cannot share with the owner
+            if ($share->getShareType() === IShare::TYPE_USER &&
+                $share->getSharedWith() === $share->getShareOwner()) {
+                throw new \InvalidArgumentException($this->l->t('Cannot share with the share owner'));
+            }
+
+            // Generate the target
+            $defaultShareFolder = $this->config->getSystemValue('share_folder', '/');
+            $allowCustomShareFolder = $this->config->getSystemValueBool('sharing.allow_custom_share_folder', true);
+            if ($allowCustomShareFolder) {
+                $shareFolder = $this->config->getUserValue($share->getSharedWith(), Application::APP_ID, 'share_folder', $defaultShareFolder);
+            } else {
+                $shareFolder = $defaultShareFolder;
+            }
+
+            $target = $shareFolder . '/' . $share->getNode()->getName();
+            $target = \OC\Files\Filesystem::normalizePath($target);
+            $share->setTarget($target);
+
+            // Pre share event
+            $event = new Share\Events\BeforeShareCreatedEvent($share);
+            $this->dispatcher->dispatchTyped($event);
+            if ($event->isPropagationStopped() && $event->getError()) {
+                throw new \Exception($event->getError());
+            }
+
+            $oldShare = $share;
+            $provider = $this->factory->getProviderForType($share->getShareType());
+            $share = $provider->create($share);
+
+            // Reuse the node we already have
+            $share->setNode($oldShare->getNode());
+
+            // Reset the target if it is null for the new share
+            if ($share->getTarget() === '') {
+                $share->setTarget($target);
+            }
+        } catch (AlreadySharedException $e) {
+            // If a share for the same target already exists, dont create a new one,
+            // but do trigger the hooks and notifications again
+            $oldShare = $share;
+
+            // Reuse the node we already have
+            $share = $e->getExistingShare();
+            $share->setNode($oldShare->getNode());
+        }
+
+        // Post share event
+        $this->dispatcher->dispatchTyped(new ShareCreatedEvent($share));
+
+        // Send email if needed
+        if ($this->config->getSystemValueBool('sharing.enable_share_mail', true)) {
+            if ($share->getMailSend()) {
+                $provider = $this->factory->getProviderForType($share->getShareType());
+                if ($provider instanceof IShareProviderWithNotification) {
+                    $provider->sendMailNotification($share);
+                } else {
+                    $this->logger->debug('Share notification not sent because the provider does not support it.', ['app' => 'share']);
+                }
+            } else {
+                $this->logger->debug('Share notification not sent because mailsend is false.', ['app' => 'share']);
+            }
+        } else {
+            $this->logger->debug('Share notification not sent because sharing notification emails is disabled.', ['app' => 'share']);
+        }
+
+        return $share;
+    }
+
+    /**
+     * Update a share
+     *
+     * @param IShare $share
+     * @return IShare The share object
+     * @throws \InvalidArgumentException
+     * @throws HintException
+     */
+    public function updateShare(IShare $share, bool $onlyValid = true) {
+        $expirationDateUpdated = false;
+
+        $this->canShare($share);
+
+        try {
+            $originalShare = $this->getShareById($share->getFullId(), onlyValid: $onlyValid);
+        } catch (\UnexpectedValueException $e) {
+            throw new \InvalidArgumentException($this->l->t('Share does not have a full ID'));
+        }
+
+        // We cannot change the share type!
+        if ($share->getShareType() !== $originalShare->getShareType()) {
+            throw new \InvalidArgumentException($this->l->t('Cannot change share type'));
+        }
+
+        // We can only change the recipient on user shares
+        if ($share->getSharedWith() !== $originalShare->getSharedWith() &&
+            $share->getShareType() !== IShare::TYPE_USER) {
+            throw new \InvalidArgumentException($this->l->t('Can only update recipient on user shares'));
+        }
+
+        // Cannot share with the owner
+        if ($share->getShareType() === IShare::TYPE_USER &&
+            $share->getSharedWith() === $share->getShareOwner()) {
+            throw new \InvalidArgumentException($this->l->t('Cannot share with the share owner'));
+        }
+
+        $this->generalCreateChecks($share, true);
+
+        if ($share->getShareType() === IShare::TYPE_USER) {
+            $this->userCreateChecks($share);
+
+            if ($share->getExpirationDate() != $originalShare->getExpirationDate()) {
+                // Verify the expiration date
+                $this->validateExpirationDateInternal($share);
+                $expirationDateUpdated = true;
+            }
+        } elseif ($share->getShareType() === IShare::TYPE_GROUP) {
+            $this->groupCreateChecks($share);
+
+            if ($share->getExpirationDate() != $originalShare->getExpirationDate()) {
+                // Verify the expiration date
+                $this->validateExpirationDateInternal($share);
+                $expirationDateUpdated = true;
+            }
+        } elseif ($share->getShareType() === IShare::TYPE_LINK
+            || $share->getShareType() === IShare::TYPE_EMAIL) {
+            $this->linkCreateChecks($share);
+
+            // The new password is not set again if it is the same as the old
+            // one, unless when switching from sending by Talk to sending by
+            // mail.
+            $plainTextPassword = $share->getPassword();
+            $updatedPassword = $this->updateSharePasswordIfNeeded($share, $originalShare);
+
+            /**
+             * Cannot enable the getSendPasswordByTalk if there is no password set
+             */
+            if (empty($plainTextPassword) && $share->getSendPasswordByTalk()) {
+                throw new \InvalidArgumentException($this->l->t('Cannot enable sending the password by Talk with an empty password'));
+            }
+
+            /**
+             * If we're in a mail share, we need to force a password change
+             * as either the user is not aware of the password or is already (received by mail)
+             * Thus the SendPasswordByTalk feature would not make sense
+             */
+            if (!$updatedPassword && $share->getShareType() === IShare::TYPE_EMAIL) {
+                if (!$originalShare->getSendPasswordByTalk() && $share->getSendPasswordByTalk()) {
+                    throw new \InvalidArgumentException($this->l->t('Cannot enable sending the password by Talk without setting a new password'));
+                }
+                if ($originalShare->getSendPasswordByTalk() && !$share->getSendPasswordByTalk()) {
+                    throw new \InvalidArgumentException($this->l->t('Cannot disable sending the password by Talk without setting a new password'));
+                }
+            }
+
+            if ($share->getExpirationDate() != $originalShare->getExpirationDate()) {
+                // Verify the expiration date
+                $this->validateExpirationDateLink($share);
+                $expirationDateUpdated = true;
+            }
+        } elseif ($share->getShareType() === IShare::TYPE_REMOTE || $share->getShareType() === IShare::TYPE_REMOTE_GROUP) {
+            if ($share->getExpirationDate() != $originalShare->getExpirationDate()) {
+                // Verify the expiration date
+                $this->validateExpirationDateInternal($share);
+                $expirationDateUpdated = true;
+            }
+        }
+
+        $this->pathCreateChecks($share->getNode());
+
+        // Now update the share!
+        $provider = $this->factory->getProviderForType($share->getShareType());
+        if ($share->getShareType() === IShare::TYPE_EMAIL) {
+            $share = $provider->update($share, $plainTextPassword);
+        } else {
+            $share = $provider->update($share);
+        }
+
+        if ($expirationDateUpdated === true) {
+            \OC_Hook::emit(Share::class, 'post_set_expiration_date', [
+                'itemType' => $share->getNode() instanceof \OCP\Files\File ? 'file' : 'folder',
+                'itemSource' => $share->getNode()->getId(),
+                'date' => $share->getExpirationDate(),
+                'uidOwner' => $share->getSharedBy(),
+            ]);
+        }
+
+        if ($share->getPassword() !== $originalShare->getPassword()) {
+            \OC_Hook::emit(Share::class, 'post_update_password', [
+                'itemType' => $share->getNode() instanceof \OCP\Files\File ? 'file' : 'folder',
+                'itemSource' => $share->getNode()->getId(),
+                'uidOwner' => $share->getSharedBy(),
+                'token' => $share->getToken(),
+                'disabled' => is_null($share->getPassword()),
+            ]);
+        }
+
+        if ($share->getPermissions() !== $originalShare->getPermissions()) {
+            if ($this->userManager->userExists($share->getShareOwner())) {
+                $userFolder = $this->rootFolder->getUserFolder($share->getShareOwner());
+            } else {
+                $userFolder = $this->rootFolder->getUserFolder($share->getSharedBy());
+            }
+            \OC_Hook::emit(Share::class, 'post_update_permissions', [
+                'itemType' => $share->getNode() instanceof \OCP\Files\File ? 'file' : 'folder',
+                'itemSource' => $share->getNode()->getId(),
+                'shareType' => $share->getShareType(),
+                'shareWith' => $share->getSharedWith(),
+                'uidOwner' => $share->getSharedBy(),
+                'permissions' => $share->getPermissions(),
+                'attributes' => $share->getAttributes() !== null ? $share->getAttributes()->toArray() : null,
+                'path' => $userFolder->getRelativePath($share->getNode()->getPath()),
+            ]);
+        }
+
+        return $share;
+    }
+
+    /**
+     * Accept a share.
+     *
+     * @param IShare $share
+     * @param string $recipientId
+     * @return IShare The share object
+     * @throws \InvalidArgumentException Thrown if the provider does not implement `IShareProviderSupportsAccept`
+     * @since 9.0.0
+     */
+    public function acceptShare(IShare $share, string $recipientId): IShare {
+        [$providerId,] = $this->splitFullId($share->getFullId());
+        $provider = $this->factory->getProvider($providerId);
+
+        if (!($provider instanceof IShareProviderSupportsAccept)) {
+            throw new \InvalidArgumentException($this->l->t('Share provider does not support accepting'));
+        }
+        /** @var IShareProvider&IShareProviderSupportsAccept $provider */
+        $provider->acceptShare($share, $recipientId);
+
+        $event = new ShareAcceptedEvent($share);
+        $this->dispatcher->dispatchTyped($event);
+
+        return $share;
+    }
+
+    /**
+     * Updates the password of the given share if it is not the same as the
+     * password of the original share.
+     *
+     * @param IShare $share the share to update its password.
+     * @param IShare $originalShare the original share to compare its
+     *                              password with.
+     * @return boolean whether the password was updated or not.
+     */
+    private function updateSharePasswordIfNeeded(IShare $share, IShare $originalShare) {
+        $passwordsAreDifferent = ($share->getPassword() !== $originalShare->getPassword()) &&
+            (($share->getPassword() !== null && $originalShare->getPassword() === null) ||
+                ($share->getPassword() === null && $originalShare->getPassword() !== null) ||
+                ($share->getPassword() !== null && $originalShare->getPassword() !== null &&
+                    !$this->hasher->verify($share->getPassword(), $originalShare->getPassword())));
+
+        // Password updated.
+        if ($passwordsAreDifferent) {
+            // Verify the password
+            $this->verifyPassword($share->getPassword());
+
+            // If a password is set. Hash it!
+            if (!empty($share->getPassword())) {
+                $share->setPassword($this->hasher->hash($share->getPassword()));
+                if ($share->getShareType() === IShare::TYPE_EMAIL) {
+                    // Shares shared by email have temporary passwords
+                    $this->setSharePasswordExpirationTime($share);
+                }
+
+                return true;
+            } else {
+                // Empty string and null are seen as NOT password protected
+                $share->setPassword(null);
+                if ($share->getShareType() === IShare::TYPE_EMAIL) {
+                    $share->setPasswordExpirationTime(null);
+                }
+                return true;
+            }
+        } else {
+            // Reset the password to the original one, as it is either the same
+            // as the "new" password or a hashed version of it.
+            $share->setPassword($originalShare->getPassword());
+        }
+
+        return false;
+    }
+
+    /**
+     * Set the share's password expiration time
+     */
+    private function setSharePasswordExpirationTime(IShare $share): void {
+        if (!$this->config->getSystemValueBool('sharing.enable_mail_link_password_expiration', false)) {
+            // Sets password expiration date to NULL
+            $share->setPasswordExpirationTime();
+            return;
+        }
+        // Sets password expiration date
+        $expirationTime = null;
+        $now = new \DateTime();
+        $expirationInterval = $this->config->getSystemValue('sharing.mail_link_password_expiration_interval', 3600);
+        $expirationTime = $now->add(new \DateInterval('PT' . $expirationInterval . 'S'));
+        $share->setPasswordExpirationTime($expirationTime);
+    }
+
+
+    /**
+     * Delete all the children of this share
+     * FIXME: remove once https://github.com/owncloud/core/pull/21660 is in
+     *
+     * @param IShare $share
+     * @return IShare[] List of deleted shares
+     */
+    protected function deleteChildren(IShare $share) {
+        $deletedShares = [];
+
+        $provider = $this->factory->getProviderForType($share->getShareType());
+
+        foreach ($provider->getChildren($share) as $child) {
+            $this->dispatcher->dispatchTyped(new BeforeShareDeletedEvent($child));
+
+            $deletedChildren = $this->deleteChildren($child);
+            $deletedShares = array_merge($deletedShares, $deletedChildren);
+
+            $provider->delete($child);
+            $this->dispatcher->dispatchTyped(new ShareDeletedEvent($child));
+            $deletedShares[] = $child;
+        }
+
+        return $deletedShares;
+    }
+
+    /** Promote re-shares into direct shares so that target user keeps access */
+    protected function promoteReshares(IShare $share): void {
+        try {
+            $node = $share->getNode();
+        } catch (NotFoundException) {
+            /* Skip if node not found */
+            return;
+        }
+
+        $userIds = [];
+
+        if ($share->getShareType() === IShare::TYPE_USER) {
+            $userIds[] = $share->getSharedWith();
+        } elseif ($share->getShareType() === IShare::TYPE_GROUP) {
+            $group = $this->groupManager->get($share->getSharedWith());
+            $users = $group?->getUsers() ?? [];
+
+            foreach ($users as $user) {
+                /* Skip share owner */
+                if ($user->getUID() === $share->getShareOwner() || $user->getUID() === $share->getSharedBy()) {
+                    continue;
+                }
+                $userIds[] = $user->getUID();
+            }
+        } else {
+            /* We only support user and group shares */
+            return;
+        }
+
+        $reshareRecords = [];
+        $shareTypes = [
+            IShare::TYPE_GROUP,
+            IShare::TYPE_USER,
+            IShare::TYPE_LINK,
+            IShare::TYPE_REMOTE,
+            IShare::TYPE_EMAIL,
+        ];
+
+        foreach ($userIds as $userId) {
+            foreach ($shareTypes as $shareType) {
+                try {
+                    $provider = $this->factory->getProviderForType($shareType);
+                } catch (ProviderException $e) {
+                    continue;
+                }
+
+                if ($node instanceof Folder) {
+                    /* We need to get all shares by this user to get subshares */
+                    $shares = $provider->getSharesBy($userId, $shareType, null, false, -1, 0);
+
+                    foreach ($shares as $share) {
+                        try {
+                            $path = $share->getNode()->getPath();
+                        } catch (NotFoundException) {
+                            /* Ignore share of non-existing node */
+                            continue;
+                        }
+                        if ($node->getRelativePath($path) !== null) {
+                            /* If relative path is not null it means the shared node is the same or in a subfolder */
+                            $reshareRecords[] = $share;
+                        }
+                    }
+                } else {
+                    $shares = $provider->getSharesBy($userId, $shareType, $node, false, -1, 0);
+                    foreach ($shares as $child) {
+                        $reshareRecords[] = $child;
+                    }
+                }
+            }
+        }
+
+        foreach ($reshareRecords as $child) {
+            try {
+                /* Check if the share is still valid (means the resharer still has access to the file through another mean) */
+                $this->generalCreateChecks($child);
+            } catch (GenericShareException $e) {
+                /* The check is invalid, promote it to a direct share from the sharer of parent share */
+                $this->logger->debug('Promote reshare because of exception ' . $e->getMessage(), ['exception' => $e, 'fullId' => $child->getFullId()]);
+                try {
+                    $child->setSharedBy($share->getSharedBy());
+                    $this->updateShare($child);
+                } catch (GenericShareException|\InvalidArgumentException $e) {
+                    $this->logger->warning('Failed to promote reshare because of exception ' . $e->getMessage(), ['exception' => $e, 'fullId' => $child->getFullId()]);
+                }
+            }
+        }
+    }
+
+    /**
+     * Delete a share
+     *
+     * @param IShare $share
+     * @throws ShareNotFound
+     * @throws \InvalidArgumentException
+     */
+    public function deleteShare(IShare $share) {
+        try {
+            $share->getFullId();
+        } catch (\UnexpectedValueException $e) {
+            throw new \InvalidArgumentException($this->l->t('Share does not have a full ID'));
+        }
+
+        $this->dispatcher->dispatchTyped(new BeforeShareDeletedEvent($share));
+
+        // Get all children and delete them as well
+        $this->deleteChildren($share);
+
+        // Do the actual delete
+        $provider = $this->factory->getProviderForType($share->getShareType());
+        $provider->delete($share);
+
+        $this->dispatcher->dispatchTyped(new ShareDeletedEvent($share));
+
+        // Promote reshares of the deleted share
+        $this->promoteReshares($share);
+    }
+
+
+    /**
+     * Unshare a file as the recipient.
+     * This can be different from a regular delete for example when one of
+     * the users in a groups deletes that share. But the provider should
+     * handle this.
+     *
+     * @param IShare $share
+     * @param string $recipientId
+     */
+    public function deleteFromSelf(IShare $share, $recipientId) {
+        [$providerId,] = $this->splitFullId($share->getFullId());
+        $provider = $this->factory->getProvider($providerId);
+
+        $provider->deleteFromSelf($share, $recipientId);
+        $event = new ShareDeletedFromSelfEvent($share);
+        $this->dispatcher->dispatchTyped($event);
+    }
+
+    public function restoreShare(IShare $share, string $recipientId): IShare {
+        [$providerId,] = $this->splitFullId($share->getFullId());
+        $provider = $this->factory->getProvider($providerId);
+
+        return $provider->restore($share, $recipientId);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function moveShare(IShare $share, $recipientId) {
+        if ($share->getShareType() === IShare::TYPE_LINK
+            || $share->getShareType() === IShare::TYPE_EMAIL) {
+            throw new \InvalidArgumentException($this->l->t('Cannot change target of link share'));
+        }
+
+        if ($share->getShareType() === IShare::TYPE_USER && $share->getSharedWith() !== $recipientId) {
+            throw new \InvalidArgumentException($this->l->t('Invalid share recipient'));
+        }
+
+        if ($share->getShareType() === IShare::TYPE_GROUP) {
+            $sharedWith = $this->groupManager->get($share->getSharedWith());
+            if (is_null($sharedWith)) {
+                throw new \InvalidArgumentException($this->l->t('Group "%s" does not exist', [$share->getSharedWith()]));
+            }
+            $recipient = $this->userManager->get($recipientId);
+            if (!$sharedWith->inGroup($recipient)) {
+                throw new \InvalidArgumentException($this->l->t('Invalid share recipient'));
+            }
+        }
+
+        [$providerId,] = $this->splitFullId($share->getFullId());
+        $provider = $this->factory->getProvider($providerId);
+
+        return $provider->move($share, $recipientId);
+    }
+
+    public function getSharesInFolder($userId, Folder $node, $reshares = false, $shallow = true) {
+        $providers = $this->factory->getAllProviders();
+        if (!$shallow) {
+            throw new \Exception('non-shallow getSharesInFolder is no longer supported');
+        }
+
+        $isOwnerless = $node->getMountPoint() instanceof IShareOwnerlessMount;
+
+        $shares = [];
+        foreach ($providers as $provider) {
+            if ($isOwnerless) {
+                foreach ($node->getDirectoryListing() as $childNode) {
+                    $data = $provider->getSharesByPath($childNode);
+                    $fid = $childNode->getId();
+                    $shares[$fid] ??= [];
+                    $shares[$fid] = array_merge($shares[$fid], $data);
+                }
+            } else {
+                foreach ($provider->getSharesInFolder($userId, $node, $reshares) as $fid => $data) {
+                    $shares[$fid] ??= [];
+                    $shares[$fid] = array_merge($shares[$fid], $data);
+                }
+            }
+        }
+
+        return $shares;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getSharesBy($userId, $shareType, $path = null, $reshares = false, $limit = 50, $offset = 0, bool $onlyValid = true) {
+        if ($path !== null &&
+            !($path instanceof \OCP\Files\File) &&
+            !($path instanceof \OCP\Files\Folder)) {
+            throw new \InvalidArgumentException($this->l->t('Invalid path'));
+        }
+
+        try {
+            $provider = $this->factory->getProviderForType($shareType);
+        } catch (ProviderException $e) {
+            return [];
+        }
+
+        if ($path?->getMountPoint() instanceof IShareOwnerlessMount) {
+            $shares = array_filter($provider->getSharesByPath($path), static fn (IShare $share) => $share->getShareType() === $shareType);
+        } else {
+            $shares = $provider->getSharesBy($userId, $shareType, $path, $reshares, $limit, $offset);
+        }
+
+        /*
 		 * Work around so we don't return expired shares but still follow
 		 * proper pagination.
 		 */
 
-		$shares2 = [];
-
-		while (true) {
-			$added = 0;
-			foreach ($shares as $share) {
-				if ($onlyValid) {
-					try {
-						$this->checkShare($share);
-					} catch (ShareNotFound $e) {
-						// Ignore since this basically means the share is deleted
-						continue;
-					}
-				}
-
-				$added++;
-				$shares2[] = $share;
-
-				if (count($shares2) === $limit) {
-					break;
-				}
-			}
-
-			// If we did not fetch more shares than the limit then there are no more shares
-			if (count($shares) < $limit) {
-				break;
-			}
-
-			if (count($shares2) === $limit) {
-				break;
-			}
-
-			// If there was no limit on the select we are done
-			if ($limit === -1) {
-				break;
-			}
-
-			$offset += $added;
-
-			// Fetch again $limit shares
-			if ($path?->getMountPoint() instanceof IShareOwnerlessMount) {
-				// We already fetched all shares, so end here
-				$shares = [];
-			} else {
-				$shares = $provider->getSharesBy($userId, $shareType, $path, $reshares, $limit, $offset);
-			}
-
-			// No more shares means we are done
-			if (empty($shares)) {
-				break;
-			}
-		}
-
-		$shares = $shares2;
-
-		return $shares;
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function getSharedWith($userId, $shareType, $node = null, $limit = 50, $offset = 0) {
-		try {
-			$provider = $this->factory->getProviderForType($shareType);
-		} catch (ProviderException $e) {
-			return [];
-		}
-
-		$shares = $provider->getSharedWith($userId, $shareType, $node, $limit, $offset);
-
-		// remove all shares which are already expired
-		foreach ($shares as $key => $share) {
-			try {
-				$this->checkShare($share);
-			} catch (ShareNotFound $e) {
-				unset($shares[$key]);
-			}
-		}
-
-		return $shares;
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function getDeletedSharedWith($userId, $shareType, $node = null, $limit = 50, $offset = 0) {
-		$shares = $this->getSharedWith($userId, $shareType, $node, $limit, $offset);
-
-		// Only get deleted shares
-		$shares = array_filter($shares, function (IShare $share) {
-			return $share->getPermissions() === 0;
-		});
-
-		// Only get shares where the owner still exists
-		$shares = array_filter($shares, function (IShare $share) {
-			return $this->userManager->userExists($share->getShareOwner());
-		});
-
-		return $shares;
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function getShareById($id, $recipient = null, bool $onlyValid = true) {
-		if ($id === null) {
-			throw new ShareNotFound();
-		}
-
-		[$providerId, $id] = $this->splitFullId($id);
-
-		try {
-			$provider = $this->factory->getProvider($providerId);
-		} catch (ProviderException $e) {
-			throw new ShareNotFound();
-		}
-
-		$share = $provider->getShareById($id, $recipient);
-
-		if ($onlyValid) {
-			$this->checkShare($share);
-		}
-
-		return $share;
-	}
-
-	/**
-	 * Get all the shares for a given path
-	 *
-	 * @param \OCP\Files\Node $path
-	 * @param int $page
-	 * @param int $perPage
-	 *
-	 * @return Share[]
-	 */
-	public function getSharesByPath(\OCP\Files\Node $path, $page = 0, $perPage = 50) {
-		return [];
-	}
-
-	/**
-	 * Get the share by token possible with password
-	 *
-	 * @param string $token
-	 * @return IShare
-	 *
-	 * @throws ShareNotFound
-	 */
-	public function getShareByToken($token) {
-		// tokens cannot be valid local user names
-		if ($this->userManager->userExists($token)) {
-			throw new ShareNotFound();
-		}
-		$share = null;
-		try {
-			if ($this->shareApiAllowLinks()) {
-				$provider = $this->factory->getProviderForType(IShare::TYPE_LINK);
-				$share = $provider->getShareByToken($token);
-			}
-		} catch (ProviderException $e) {
-		} catch (ShareNotFound $e) {
-		}
-
-
-		// If it is not a link share try to fetch a federated share by token
-		if ($share === null) {
-			try {
-				$provider = $this->factory->getProviderForType(IShare::TYPE_REMOTE);
-				$share = $provider->getShareByToken($token);
-			} catch (ProviderException $e) {
-			} catch (ShareNotFound $e) {
-			}
-		}
-
-		// If it is not a link share try to fetch a mail share by token
-		if ($share === null && $this->shareProviderExists(IShare::TYPE_EMAIL)) {
-			try {
-				$provider = $this->factory->getProviderForType(IShare::TYPE_EMAIL);
-				$share = $provider->getShareByToken($token);
-			} catch (ProviderException $e) {
-			} catch (ShareNotFound $e) {
-			}
-		}
-
-		if ($share === null && $this->shareProviderExists(IShare::TYPE_CIRCLE)) {
-			try {
-				$provider = $this->factory->getProviderForType(IShare::TYPE_CIRCLE);
-				$share = $provider->getShareByToken($token);
-			} catch (ProviderException $e) {
-			} catch (ShareNotFound $e) {
-			}
-		}
-
-		if ($share === null && $this->shareProviderExists(IShare::TYPE_ROOM)) {
-			try {
-				$provider = $this->factory->getProviderForType(IShare::TYPE_ROOM);
-				$share = $provider->getShareByToken($token);
-			} catch (ProviderException $e) {
-			} catch (ShareNotFound $e) {
-			}
-		}
-
-		if ($share === null) {
-			throw new ShareNotFound($this->l->t('The requested share does not exist anymore'));
-		}
-
-		$this->checkShare($share);
-
-		/*
+        $shares2 = [];
+
+        while (true) {
+            $added = 0;
+            foreach ($shares as $share) {
+                if ($onlyValid) {
+                    try {
+                        $this->checkShare($share);
+                    } catch (ShareNotFound $e) {
+                        // Ignore since this basically means the share is deleted
+                        continue;
+                    }
+                }
+
+                $added++;
+                $shares2[] = $share;
+
+                if (count($shares2) === $limit) {
+                    break;
+                }
+            }
+
+            // If we did not fetch more shares than the limit then there are no more shares
+            if (count($shares) < $limit) {
+                break;
+            }
+
+            if (count($shares2) === $limit) {
+                break;
+            }
+
+            // If there was no limit on the select we are done
+            if ($limit === -1) {
+                break;
+            }
+
+            $offset += $added;
+
+            // Fetch again $limit shares
+            if ($path?->getMountPoint() instanceof IShareOwnerlessMount) {
+                // We already fetched all shares, so end here
+                $shares = [];
+            } else {
+                $shares = $provider->getSharesBy($userId, $shareType, $path, $reshares, $limit, $offset);
+            }
+
+            // No more shares means we are done
+            if (empty($shares)) {
+                break;
+            }
+        }
+
+        $shares = $shares2;
+
+        return $shares;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getSharedWith($userId, $shareType, $node = null, $limit = 50, $offset = 0) {
+        try {
+            $provider = $this->factory->getProviderForType($shareType);
+        } catch (ProviderException $e) {
+            return [];
+        }
+
+        $shares = $provider->getSharedWith($userId, $shareType, $node, $limit, $offset);
+
+        // remove all shares which are already expired
+        foreach ($shares as $key => $share) {
+            try {
+                $this->checkShare($share);
+            } catch (ShareNotFound $e) {
+                unset($shares[$key]);
+            }
+        }
+
+        return $shares;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getDeletedSharedWith($userId, $shareType, $node = null, $limit = 50, $offset = 0) {
+        $shares = $this->getSharedWith($userId, $shareType, $node, $limit, $offset);
+
+        // Only get deleted shares
+        $shares = array_filter($shares, function (IShare $share) {
+            return $share->getPermissions() === 0;
+        });
+
+        // Only get shares where the owner still exists
+        $shares = array_filter($shares, function (IShare $share) {
+            return $this->userManager->userExists($share->getShareOwner());
+        });
+
+        return $shares;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getShareById($id, $recipient = null, bool $onlyValid = true) {
+        if ($id === null) {
+            throw new ShareNotFound();
+        }
+
+        [$providerId, $id] = $this->splitFullId($id);
+
+        try {
+            $provider = $this->factory->getProvider($providerId);
+        } catch (ProviderException $e) {
+            throw new ShareNotFound();
+        }
+
+        $share = $provider->getShareById($id, $recipient);
+
+        if ($onlyValid) {
+            $this->checkShare($share);
+        }
+
+        return $share;
+    }
+
+    /**
+     * Get all the shares for a given path
+     *
+     * @param \OCP\Files\Node $path
+     * @param int $page
+     * @param int $perPage
+     *
+     * @return Share[]
+     */
+    public function getSharesByPath(\OCP\Files\Node $path, $page = 0, $perPage = 50) {
+        return [];
+    }
+
+    /**
+     * Get the share by token possible with password
+     *
+     * @param string $token
+     * @return IShare
+     *
+     * @throws ShareNotFound
+     */
+    public function getShareByToken($token) {
+        // tokens cannot be valid local user names
+        if ($this->userManager->userExists($token)) {
+            throw new ShareNotFound();
+        }
+        $share = null;
+        try {
+            if ($this->shareApiAllowLinks()) {
+                $provider = $this->factory->getProviderForType(IShare::TYPE_LINK);
+                $share = $provider->getShareByToken($token);
+            }
+        } catch (ProviderException $e) {
+        } catch (ShareNotFound $e) {
+        }
+
+
+        // If it is not a link share try to fetch a federated share by token
+        if ($share === null) {
+            try {
+                $provider = $this->factory->getProviderForType(IShare::TYPE_REMOTE);
+                $share = $provider->getShareByToken($token);
+            } catch (ProviderException $e) {
+            } catch (ShareNotFound $e) {
+            }
+        }
+
+        // If it is not a link share try to fetch a mail share by token
+        if ($share === null && $this->shareProviderExists(IShare::TYPE_EMAIL)) {
+            try {
+                $provider = $this->factory->getProviderForType(IShare::TYPE_EMAIL);
+                $share = $provider->getShareByToken($token);
+            } catch (ProviderException $e) {
+            } catch (ShareNotFound $e) {
+            }
+        }
+
+        if ($share === null && $this->shareProviderExists(IShare::TYPE_CIRCLE)) {
+            try {
+                $provider = $this->factory->getProviderForType(IShare::TYPE_CIRCLE);
+                $share = $provider->getShareByToken($token);
+            } catch (ProviderException $e) {
+            } catch (ShareNotFound $e) {
+            }
+        }
+
+        if ($share === null && $this->shareProviderExists(IShare::TYPE_ROOM)) {
+            try {
+                $provider = $this->factory->getProviderForType(IShare::TYPE_ROOM);
+                $share = $provider->getShareByToken($token);
+            } catch (ProviderException $e) {
+            } catch (ShareNotFound $e) {
+            }
+        }
+
+        if ($share === null) {
+            throw new ShareNotFound($this->l->t('The requested share does not exist anymore'));
+        }
+
+        $this->checkShare($share);
+
+        /*
 		 * Reduce the permissions for link or email shares if public upload is not enabled
 		 */
-		if (($share->getShareType() === IShare::TYPE_LINK || $share->getShareType() === IShare::TYPE_EMAIL)
-			&& $share->getNodeType() === 'folder' && !$this->shareApiLinkAllowPublicUpload()) {
-			$share->setPermissions($share->getPermissions() & ~(\OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_UPDATE));
-		}
-
-		return $share;
-	}
-
-	/**
-	 * Check expire date and disabled owner
-	 *
-	 * @throws ShareNotFound
-	 */
-	protected function checkShare(IShare $share): void {
-		if ($share->isExpired()) {
-			$this->deleteShare($share);
-			throw new ShareNotFound($this->l->t('The requested share does not exist anymore'));
-		}
-		if ($this->config->getAppValue('files_sharing', 'hide_disabled_user_shares', 'no') === 'yes') {
-			$uids = array_unique([$share->getShareOwner(),$share->getSharedBy()]);
-			foreach ($uids as $uid) {
-				$user = $this->userManager->get($uid);
-				if ($user?->isEnabled() === false) {
-					throw new ShareNotFound($this->l->t('The requested share comes from a disabled user'));
-				}
-			}
-		}
-	}
-
-	/**
-	 * Verify the password of a public share
-	 *
-	 * @param IShare $share
-	 * @param ?string $password
-	 * @return bool
-	 */
-	public function checkPassword(IShare $share, $password) {
-
-		// if there is no password on the share object / passsword is null, there is nothing to check
-		if ($password === null || $share->getPassword() === null) {
-			return false;
-		}
-
-		// Makes sure password hasn't expired
-		$expirationTime = $share->getPasswordExpirationTime();
-		if ($expirationTime !== null && $expirationTime < new \DateTime()) {
-			return false;
-		}
-
-		$newHash = '';
-		if (!$this->hasher->verify($password, $share->getPassword(), $newHash)) {
-			return false;
-		}
-
-		if (!empty($newHash)) {
-			$share->setPassword($newHash);
-			$provider = $this->factory->getProviderForType($share->getShareType());
-			$provider->update($share);
-		}
-
-		return true;
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function userDeleted($uid) {
-		$types = [IShare::TYPE_USER, IShare::TYPE_GROUP, IShare::TYPE_LINK, IShare::TYPE_REMOTE, IShare::TYPE_EMAIL];
-
-		foreach ($types as $type) {
-			try {
-				$provider = $this->factory->getProviderForType($type);
-			} catch (ProviderException $e) {
-				continue;
-			}
-			$provider->userDeleted($uid, $type);
-		}
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function groupDeleted($gid) {
-		foreach ([IShare::TYPE_GROUP, IShare::TYPE_REMOTE_GROUP] as $type) {
-			try {
-				$provider = $this->factory->getProviderForType($type);
-			} catch (ProviderException $e) {
-				continue;
-			}
-			$provider->groupDeleted($gid);
-		}
-
-		$excludedGroups = $this->config->getAppValue('core', 'shareapi_exclude_groups_list', '');
-		if ($excludedGroups === '') {
-			return;
-		}
-
-		$excludedGroups = json_decode($excludedGroups, true);
-		if (json_last_error() !== JSON_ERROR_NONE) {
-			return;
-		}
-
-		$excludedGroups = array_diff($excludedGroups, [$gid]);
-		$this->config->setAppValue('core', 'shareapi_exclude_groups_list', json_encode($excludedGroups));
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function userDeletedFromGroup($uid, $gid) {
-		foreach ([IShare::TYPE_GROUP, IShare::TYPE_REMOTE_GROUP] as $type) {
-			try {
-				$provider = $this->factory->getProviderForType($type);
-			} catch (ProviderException $e) {
-				continue;
-			}
-			$provider->userDeletedFromGroup($uid, $gid);
-		}
-	}
-
-	/**
-	 * Get access list to a path. This means
-	 * all the users that can access a given path.
-	 *
-	 * Consider:
-	 * -root
-	 * |-folder1 (23)
-	 *  |-folder2 (32)
-	 *   |-fileA (42)
-	 *
-	 * fileA is shared with user1 and user1@server1 and email1@maildomain1
-	 * folder2 is shared with group2 (user4 is a member of group2)
-	 * folder1 is shared with user2 (renamed to "folder (1)") and user2@server2
-	 *                        and email2@maildomain2
-	 *
-	 * Then the access list to '/folder1/folder2/fileA' with $currentAccess is:
-	 * [
-	 *  users  => [
-	 *      'user1' => ['node_id' => 42, 'node_path' => '/fileA'],
-	 *      'user4' => ['node_id' => 32, 'node_path' => '/folder2'],
-	 *      'user2' => ['node_id' => 23, 'node_path' => '/folder (1)'],
-	 *  ],
-	 *  remote => [
-	 *      'user1@server1' => ['node_id' => 42, 'token' => 'SeCr3t'],
-	 *      'user2@server2' => ['node_id' => 23, 'token' => 'FooBaR'],
-	 *  ],
-	 *  public => bool
-	 *  mail => [
-	 *      'email1@maildomain1' => ['node_id' => 42, 'token' => 'aBcDeFg'],
-	 *      'email2@maildomain2' => ['node_id' => 23, 'token' => 'hIjKlMn'],
-	 *  ]
-	 * ]
-	 *
-	 * The access list to '/folder1/folder2/fileA' **without** $currentAccess is:
-	 * [
-	 *  users  => ['user1', 'user2', 'user4'],
-	 *  remote => bool,
-	 *  public => bool
-	 *  mail => ['email1@maildomain1', 'email2@maildomain2']
-	 * ]
-	 *
-	 * This is required for encryption/activity
-	 *
-	 * @param \OCP\Files\Node $path
-	 * @param bool $recursive Should we check all parent folders as well
-	 * @param bool $currentAccess Ensure the recipient has access to the file (e.g. did not unshare it)
-	 * @return array
-	 */
-	public function getAccessList(\OCP\Files\Node $path, $recursive = true, $currentAccess = false) {
-		$owner = $path->getOwner();
-
-		if ($owner === null) {
-			return [];
-		}
-
-		$owner = $owner->getUID();
-
-		if ($currentAccess) {
-			$al = ['users' => [], 'remote' => [], 'public' => false, 'mail' => []];
-		} else {
-			$al = ['users' => [], 'remote' => false, 'public' => false, 'mail' => []];
-		}
-		if (!$this->userManager->userExists($owner)) {
-			return $al;
-		}
-
-		//Get node for the owner and correct the owner in case of external storage
-		$userFolder = $this->rootFolder->getUserFolder($owner);
-		if ($path->getId() !== $userFolder->getId() && !$userFolder->isSubNode($path)) {
-			$path = $userFolder->getFirstNodeById($path->getId());
-			if ($path === null || $path->getOwner() === null) {
-				return [];
-			}
-			$owner = $path->getOwner()->getUID();
-		}
-
-		$providers = $this->factory->getAllProviders();
-
-		/** @var Node[] $nodes */
-		$nodes = [];
-
-
-		if ($currentAccess) {
-			$ownerPath = $path->getPath();
-			$ownerPath = explode('/', $ownerPath, 4);
-			if (count($ownerPath) < 4) {
-				$ownerPath = '';
-			} else {
-				$ownerPath = $ownerPath[3];
-			}
-			$al['users'][$owner] = [
-				'node_id' => $path->getId(),
-				'node_path' => '/' . $ownerPath,
-			];
-		} else {
-			$al['users'][] = $owner;
-		}
-
-		// Collect all the shares
-		while ($path->getPath() !== $userFolder->getPath()) {
-			$nodes[] = $path;
-			if (!$recursive) {
-				break;
-			}
-			$path = $path->getParent();
-		}
-
-		foreach ($providers as $provider) {
-			$tmp = $provider->getAccessList($nodes, $currentAccess);
-
-			foreach ($tmp as $k => $v) {
-				if (isset($al[$k])) {
-					if (is_array($al[$k])) {
-						if ($currentAccess) {
-							$al[$k] += $v;
-						} else {
-							$al[$k] = array_merge($al[$k], $v);
-							$al[$k] = array_unique($al[$k]);
-							$al[$k] = array_values($al[$k]);
-						}
-					} else {
-						$al[$k] = $al[$k] || $v;
-					}
-				} else {
-					$al[$k] = $v;
-				}
-			}
-		}
-
-		return $al;
-	}
-
-	/**
-	 * Create a new share
-	 *
-	 * @return IShare
-	 */
-	public function newShare() {
-		return new \OC\Share20\Share($this->rootFolder, $this->userManager);
-	}
-
-	/**
-	 * Is the share API enabled
-	 *
-	 * @return bool
-	 */
-	public function shareApiEnabled() {
-		return $this->config->getAppValue('core', 'shareapi_enabled', 'yes') === 'yes';
-	}
-
-	/**
-	 * Is public link sharing enabled
-	 *
-	 * @return bool
-	 */
-	public function shareApiAllowLinks() {
-		if ($this->config->getAppValue('core', 'shareapi_allow_links', 'yes') !== 'yes') {
-			return false;
-		}
-
-		$user = $this->userSession->getUser();
-		if ($user) {
-			$excludedGroups = json_decode($this->config->getAppValue('core', 'shareapi_allow_links_exclude_groups', '[]'));
-			if ($excludedGroups) {
-				$userGroups = $this->groupManager->getUserGroupIds($user);
-				return !(bool)array_intersect($excludedGroups, $userGroups);
-			}
-		}
-
-		return true;
-	}
-
-	/**
-	 * Is password on public link requires
-	 *
-	 * @param bool Check group membership exclusion
-	 * @return bool
-	 */
-	public function shareApiLinkEnforcePassword(bool $checkGroupMembership = true) {
-		$excludedGroups = $this->config->getAppValue('core', 'shareapi_enforce_links_password_excluded_groups', '');
-		if ($excludedGroups !== '' && $checkGroupMembership) {
-			$excludedGroups = json_decode($excludedGroups);
-			$user = $this->userSession->getUser();
-			if ($user) {
-				$userGroups = $this->groupManager->getUserGroupIds($user);
-				if ((bool)array_intersect($excludedGroups, $userGroups)) {
-					return false;
-				}
-			}
-		}
-		return $this->config->getAppValue('core', 'shareapi_enforce_links_password', 'no') === 'yes';
-	}
-
-	/**
-	 * Is default link expire date enabled
-	 *
-	 * @return bool
-	 */
-	public function shareApiLinkDefaultExpireDate() {
-		return $this->config->getAppValue('core', 'shareapi_default_expire_date', 'no') === 'yes';
-	}
-
-	/**
-	 * Is default link expire date enforced
-	 *`
-	 *
-	 * @return bool
-	 */
-	public function shareApiLinkDefaultExpireDateEnforced() {
-		return $this->shareApiLinkDefaultExpireDate() &&
-			$this->config->getAppValue('core', 'shareapi_enforce_expire_date', 'no') === 'yes';
-	}
-
-
-	/**
-	 * Number of default link expire days
-	 *
-	 * @return int
-	 */
-	public function shareApiLinkDefaultExpireDays() {
-		return (int)$this->config->getAppValue('core', 'shareapi_expire_after_n_days', '7');
-	}
-
-	/**
-	 * Is default internal expire date enabled
-	 *
-	 * @return bool
-	 */
-	public function shareApiInternalDefaultExpireDate(): bool {
-		return $this->config->getAppValue('core', 'shareapi_default_internal_expire_date', 'no') === 'yes';
-	}
-
-	/**
-	 * Is default remote expire date enabled
-	 *
-	 * @return bool
-	 */
-	public function shareApiRemoteDefaultExpireDate(): bool {
-		return $this->config->getAppValue('core', 'shareapi_default_remote_expire_date', 'no') === 'yes';
-	}
-
-	/**
-	 * Is default expire date enforced
-	 *
-	 * @return bool
-	 */
-	public function shareApiInternalDefaultExpireDateEnforced(): bool {
-		return $this->shareApiInternalDefaultExpireDate() &&
-			$this->config->getAppValue('core', 'shareapi_enforce_internal_expire_date', 'no') === 'yes';
-	}
-
-	/**
-	 * Is default expire date enforced for remote shares
-	 *
-	 * @return bool
-	 */
-	public function shareApiRemoteDefaultExpireDateEnforced(): bool {
-		return $this->shareApiRemoteDefaultExpireDate() &&
-			$this->config->getAppValue('core', 'shareapi_enforce_remote_expire_date', 'no') === 'yes';
-	}
-
-	/**
-	 * Number of default expire days
-	 *
-	 * @return int
-	 */
-	public function shareApiInternalDefaultExpireDays(): int {
-		return (int)$this->config->getAppValue('core', 'shareapi_internal_expire_after_n_days', '7');
-	}
-
-	/**
-	 * Number of default expire days for remote shares
-	 *
-	 * @return int
-	 */
-	public function shareApiRemoteDefaultExpireDays(): int {
-		return (int)$this->config->getAppValue('core', 'shareapi_remote_expire_after_n_days', '7');
-	}
-
-	/**
-	 * Allow public upload on link shares
-	 *
-	 * @return bool
-	 */
-	public function shareApiLinkAllowPublicUpload() {
-		return $this->config->getAppValue('core', 'shareapi_allow_public_upload', 'yes') === 'yes';
-	}
-
-	/**
-	 * check if user can only share with group members
-	 *
-	 * @return bool
-	 */
-	public function shareWithGroupMembersOnly() {
-		return $this->config->getAppValue('core', 'shareapi_only_share_with_group_members', 'no') === 'yes';
-	}
-
-	/**
-	 * If shareWithGroupMembersOnly is enabled, return an optional
-	 * list of groups that must be excluded from the principle of
-	 * belonging to the same group.
-	 *
-	 * @return array
-	 */
-	public function shareWithGroupMembersOnlyExcludeGroupsList() {
-		if (!$this->shareWithGroupMembersOnly()) {
-			return [];
-		}
-		$excludeGroups = $this->config->getAppValue('core', 'shareapi_only_share_with_group_members_exclude_group_list', '');
-		return json_decode($excludeGroups, true) ?? [];
-	}
-
-	/**
-	 * Check if users can share with groups
-	 *
-	 * @return bool
-	 */
-	public function allowGroupSharing() {
-		return $this->config->getAppValue('core', 'shareapi_allow_group_sharing', 'yes') === 'yes';
-	}
-
-	public function allowEnumeration(): bool {
-		return $this->config->getAppValue('core', 'shareapi_allow_share_dialog_user_enumeration', 'yes') === 'yes';
-	}
-
-	public function limitEnumerationToGroups(): bool {
-		return $this->allowEnumeration() &&
-			$this->config->getAppValue('core', 'shareapi_restrict_user_enumeration_to_group', 'no') === 'yes';
-	}
-
-	public function limitEnumerationToPhone(): bool {
-		return $this->allowEnumeration() &&
-			$this->config->getAppValue('core', 'shareapi_restrict_user_enumeration_to_phone', 'no') === 'yes';
-	}
-
-	public function allowEnumerationFullMatch(): bool {
-		return $this->config->getAppValue('core', 'shareapi_restrict_user_enumeration_full_match', 'yes') === 'yes';
-	}
-
-	public function matchEmail(): bool {
-		return $this->config->getAppValue('core', 'shareapi_restrict_user_enumeration_full_match_email', 'yes') === 'yes';
-	}
-
-	public function ignoreSecondDisplayName(): bool {
-		return $this->config->getAppValue('core', 'shareapi_restrict_user_enumeration_full_match_ignore_second_dn', 'no') === 'yes';
-	}
-
-	public function allowCustomTokens(): bool {
-		return $this->appConfig->getValueBool('core', 'shareapi_allow_custom_tokens', false);
-	}
-
-	public function currentUserCanEnumerateTargetUser(?IUser $currentUser, IUser $targetUser): bool {
-		if ($this->allowEnumerationFullMatch()) {
-			return true;
-		}
-
-		if (!$this->allowEnumeration()) {
-			return false;
-		}
-
-		if (!$this->limitEnumerationToPhone() && !$this->limitEnumerationToGroups()) {
-			// Enumeration is enabled and not restricted: OK
-			return true;
-		}
-
-		if (!$currentUser instanceof IUser) {
-			// Enumeration restrictions require an account
-			return false;
-		}
-
-		// Enumeration is limited to phone match
-		if ($this->limitEnumerationToPhone() && $this->knownUserService->isKnownToUser($currentUser->getUID(), $targetUser->getUID())) {
-			return true;
-		}
-
-		// Enumeration is limited to groups
-		if ($this->limitEnumerationToGroups()) {
-			$currentUserGroupIds = $this->groupManager->getUserGroupIds($currentUser);
-			$targetUserGroupIds = $this->groupManager->getUserGroupIds($targetUser);
-			if (!empty(array_intersect($currentUserGroupIds, $targetUserGroupIds))) {
-				return true;
-			}
-		}
-
-		return false;
-	}
-
-	/**
-	 * Copied from \OC_Util::isSharingDisabledForUser
-	 *
-	 * TODO: Deprecate function from OC_Util
-	 *
-	 * @param string $userId
-	 * @return bool
-	 */
-	public function sharingDisabledForUser($userId) {
-		return $this->shareDisableChecker->sharingDisabledForUser($userId);
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function outgoingServer2ServerSharesAllowed() {
-		return $this->config->getAppValue('files_sharing', 'outgoing_server2server_share_enabled', 'yes') === 'yes';
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function outgoingServer2ServerGroupSharesAllowed() {
-		return $this->config->getAppValue('files_sharing', 'outgoing_server2server_group_share_enabled', 'no') === 'yes';
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function shareProviderExists($shareType) {
-		try {
-			$this->factory->getProviderForType($shareType);
-		} catch (ProviderException $e) {
-			return false;
-		}
-
-		return true;
-	}
-
-	public function registerShareProvider(string $shareProviderClass): void {
-		$this->factory->registerProvider($shareProviderClass);
-	}
-
-	public function getAllShares(): iterable {
-		$providers = $this->factory->getAllProviders();
-
-		foreach ($providers as $provider) {
-			yield from $provider->getAllShares();
-		}
-	}
-
-	public function generateToken(): string {
-		// Initial token length
-		$tokenLength = \OC\Share\Helper::getTokenLength();
-
-		do {
-			$tokenExists = false;
-
-			for ($i = 0; $i <= 2; $i++) {
-				// Generate a new token
-				$token = $this->secureRandom->generate(
-					$tokenLength,
-					ISecureRandom::CHAR_HUMAN_READABLE,
-				);
-
-				try {
-					// Try to fetch a share with the generated token
-					$this->getShareByToken($token);
-					$tokenExists = true; // Token exists, we need to try again
-				} catch (ShareNotFound $e) {
-					// Token is unique, exit the loop
-					$tokenExists = false;
-					break;
-				}
-			}
-
-			// If we've reached the maximum attempts and the token still exists, increase the token length
-			if ($tokenExists) {
-				$tokenLength++;
-
-				// Check if the token length exceeds the maximum allowed length
-				if ($tokenLength > \OC\Share\Constants::MAX_TOKEN_LENGTH) {
-					throw new ShareTokenException('Unable to generate a unique share token. Maximum token length exceeded.');
-				}
-			}
-		} while ($tokenExists);
-
-		return $token;
-	}
+        if (($share->getShareType() === IShare::TYPE_LINK || $share->getShareType() === IShare::TYPE_EMAIL)
+            && $share->getNodeType() === 'folder' && !$this->shareApiLinkAllowPublicUpload()) {
+            $share->setPermissions($share->getPermissions() & ~(\OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_UPDATE));
+        }
+
+        return $share;
+    }
+
+    /**
+     * Check expire date and disabled owner
+     *
+     * @throws ShareNotFound
+     */
+    protected function checkShare(IShare $share): void {
+        if ($share->isExpired()) {
+            $this->deleteShare($share);
+            throw new ShareNotFound($this->l->t('The requested share does not exist anymore'));
+        }
+        if ($this->config->getAppValue('files_sharing', 'hide_disabled_user_shares', 'no') === 'yes') {
+            $uids = array_unique([$share->getShareOwner(),$share->getSharedBy()]);
+            foreach ($uids as $uid) {
+                $user = $this->userManager->get($uid);
+                if ($user?->isEnabled() === false) {
+                    throw new ShareNotFound($this->l->t('The requested share comes from a disabled user'));
+                }
+            }
+        }
+    }
+
+    /**
+     * Verify the password of a public share
+     *
+     * @param IShare $share
+     * @param ?string $password
+     * @return bool
+     */
+    public function checkPassword(IShare $share, $password) {
+
+        // if there is no password on the share object / passsword is null, there is nothing to check
+        if ($password === null || $share->getPassword() === null) {
+            return false;
+        }
+
+        // Makes sure password hasn't expired
+        $expirationTime = $share->getPasswordExpirationTime();
+        if ($expirationTime !== null && $expirationTime < new \DateTime()) {
+            return false;
+        }
+
+        $newHash = '';
+        if (!$this->hasher->verify($password, $share->getPassword(), $newHash)) {
+            return false;
+        }
+
+        if (!empty($newHash)) {
+            $share->setPassword($newHash);
+            $provider = $this->factory->getProviderForType($share->getShareType());
+            $provider->update($share);
+        }
+
+        return true;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function userDeleted($uid) {
+        $types = [IShare::TYPE_USER, IShare::TYPE_GROUP, IShare::TYPE_LINK, IShare::TYPE_REMOTE, IShare::TYPE_EMAIL];
+
+        foreach ($types as $type) {
+            try {
+                $provider = $this->factory->getProviderForType($type);
+            } catch (ProviderException $e) {
+                continue;
+            }
+            $provider->userDeleted($uid, $type);
+        }
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function groupDeleted($gid) {
+        foreach ([IShare::TYPE_GROUP, IShare::TYPE_REMOTE_GROUP] as $type) {
+            try {
+                $provider = $this->factory->getProviderForType($type);
+            } catch (ProviderException $e) {
+                continue;
+            }
+            $provider->groupDeleted($gid);
+        }
+
+        $excludedGroups = $this->config->getAppValue('core', 'shareapi_exclude_groups_list', '');
+        if ($excludedGroups === '') {
+            return;
+        }
+
+        $excludedGroups = json_decode($excludedGroups, true);
+        if (json_last_error() !== JSON_ERROR_NONE) {
+            return;
+        }
+
+        $excludedGroups = array_diff($excludedGroups, [$gid]);
+        $this->config->setAppValue('core', 'shareapi_exclude_groups_list', json_encode($excludedGroups));
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function userDeletedFromGroup($uid, $gid) {
+        foreach ([IShare::TYPE_GROUP, IShare::TYPE_REMOTE_GROUP] as $type) {
+            try {
+                $provider = $this->factory->getProviderForType($type);
+            } catch (ProviderException $e) {
+                continue;
+            }
+            $provider->userDeletedFromGroup($uid, $gid);
+        }
+    }
+
+    /**
+     * Get access list to a path. This means
+     * all the users that can access a given path.
+     *
+     * Consider:
+     * -root
+     * |-folder1 (23)
+     *  |-folder2 (32)
+     *   |-fileA (42)
+     *
+     * fileA is shared with user1 and user1@server1 and email1@maildomain1
+     * folder2 is shared with group2 (user4 is a member of group2)
+     * folder1 is shared with user2 (renamed to "folder (1)") and user2@server2
+     *                        and email2@maildomain2
+     *
+     * Then the access list to '/folder1/folder2/fileA' with $currentAccess is:
+     * [
+     *  users  => [
+     *      'user1' => ['node_id' => 42, 'node_path' => '/fileA'],
+     *      'user4' => ['node_id' => 32, 'node_path' => '/folder2'],
+     *      'user2' => ['node_id' => 23, 'node_path' => '/folder (1)'],
+     *  ],
+     *  remote => [
+     *      'user1@server1' => ['node_id' => 42, 'token' => 'SeCr3t'],
+     *      'user2@server2' => ['node_id' => 23, 'token' => 'FooBaR'],
+     *  ],
+     *  public => bool
+     *  mail => [
+     *      'email1@maildomain1' => ['node_id' => 42, 'token' => 'aBcDeFg'],
+     *      'email2@maildomain2' => ['node_id' => 23, 'token' => 'hIjKlMn'],
+     *  ]
+     * ]
+     *
+     * The access list to '/folder1/folder2/fileA' **without** $currentAccess is:
+     * [
+     *  users  => ['user1', 'user2', 'user4'],
+     *  remote => bool,
+     *  public => bool
+     *  mail => ['email1@maildomain1', 'email2@maildomain2']
+     * ]
+     *
+     * This is required for encryption/activity
+     *
+     * @param \OCP\Files\Node $path
+     * @param bool $recursive Should we check all parent folders as well
+     * @param bool $currentAccess Ensure the recipient has access to the file (e.g. did not unshare it)
+     * @return array
+     */
+    public function getAccessList(\OCP\Files\Node $path, $recursive = true, $currentAccess = false) {
+        $owner = $path->getOwner();
+
+        if ($owner === null) {
+            return [];
+        }
+
+        $owner = $owner->getUID();
+
+        if ($currentAccess) {
+            $al = ['users' => [], 'remote' => [], 'public' => false, 'mail' => []];
+        } else {
+            $al = ['users' => [], 'remote' => false, 'public' => false, 'mail' => []];
+        }
+        if (!$this->userManager->userExists($owner)) {
+            return $al;
+        }
+
+        //Get node for the owner and correct the owner in case of external storage
+        $userFolder = $this->rootFolder->getUserFolder($owner);
+        if ($path->getId() !== $userFolder->getId() && !$userFolder->isSubNode($path)) {
+            $path = $userFolder->getFirstNodeById($path->getId());
+            if ($path === null || $path->getOwner() === null) {
+                return [];
+            }
+            $owner = $path->getOwner()->getUID();
+        }
+
+        $providers = $this->factory->getAllProviders();
+
+        /** @var Node[] $nodes */
+        $nodes = [];
+
+
+        if ($currentAccess) {
+            $ownerPath = $path->getPath();
+            $ownerPath = explode('/', $ownerPath, 4);
+            if (count($ownerPath) < 4) {
+                $ownerPath = '';
+            } else {
+                $ownerPath = $ownerPath[3];
+            }
+            $al['users'][$owner] = [
+                'node_id' => $path->getId(),
+                'node_path' => '/' . $ownerPath,
+            ];
+        } else {
+            $al['users'][] = $owner;
+        }
+
+        // Collect all the shares
+        while ($path->getPath() !== $userFolder->getPath()) {
+            $nodes[] = $path;
+            if (!$recursive) {
+                break;
+            }
+            $path = $path->getParent();
+        }
+
+        foreach ($providers as $provider) {
+            $tmp = $provider->getAccessList($nodes, $currentAccess);
+
+            foreach ($tmp as $k => $v) {
+                if (isset($al[$k])) {
+                    if (is_array($al[$k])) {
+                        if ($currentAccess) {
+                            $al[$k] += $v;
+                        } else {
+                            $al[$k] = array_merge($al[$k], $v);
+                            $al[$k] = array_unique($al[$k]);
+                            $al[$k] = array_values($al[$k]);
+                        }
+                    } else {
+                        $al[$k] = $al[$k] || $v;
+                    }
+                } else {
+                    $al[$k] = $v;
+                }
+            }
+        }
+
+        return $al;
+    }
+
+    /**
+     * Create a new share
+     *
+     * @return IShare
+     */
+    public function newShare() {
+        return new \OC\Share20\Share($this->rootFolder, $this->userManager);
+    }
+
+    /**
+     * Is the share API enabled
+     *
+     * @return bool
+     */
+    public function shareApiEnabled() {
+        return $this->config->getAppValue('core', 'shareapi_enabled', 'yes') === 'yes';
+    }
+
+    /**
+     * Is public link sharing enabled
+     *
+     * @return bool
+     */
+    public function shareApiAllowLinks() {
+        if ($this->config->getAppValue('core', 'shareapi_allow_links', 'yes') !== 'yes') {
+            return false;
+        }
+
+        $user = $this->userSession->getUser();
+        if ($user) {
+            $excludedGroups = json_decode($this->config->getAppValue('core', 'shareapi_allow_links_exclude_groups', '[]'));
+            if ($excludedGroups) {
+                $userGroups = $this->groupManager->getUserGroupIds($user);
+                return !(bool)array_intersect($excludedGroups, $userGroups);
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * Is password on public link requires
+     *
+     * @param bool Check group membership exclusion
+     * @return bool
+     */
+    public function shareApiLinkEnforcePassword(bool $checkGroupMembership = true) {
+        $excludedGroups = $this->config->getAppValue('core', 'shareapi_enforce_links_password_excluded_groups', '');
+        if ($excludedGroups !== '' && $checkGroupMembership) {
+            $excludedGroups = json_decode($excludedGroups);
+            $user = $this->userSession->getUser();
+            if ($user) {
+                $userGroups = $this->groupManager->getUserGroupIds($user);
+                if ((bool)array_intersect($excludedGroups, $userGroups)) {
+                    return false;
+                }
+            }
+        }
+        return $this->config->getAppValue('core', 'shareapi_enforce_links_password', 'no') === 'yes';
+    }
+
+    /**
+     * Is default link expire date enabled
+     *
+     * @return bool
+     */
+    public function shareApiLinkDefaultExpireDate() {
+        return $this->config->getAppValue('core', 'shareapi_default_expire_date', 'no') === 'yes';
+    }
+
+    /**
+     * Is default link expire date enforced
+     *`
+     *
+     * @return bool
+     */
+    public function shareApiLinkDefaultExpireDateEnforced() {
+        return $this->shareApiLinkDefaultExpireDate() &&
+            $this->config->getAppValue('core', 'shareapi_enforce_expire_date', 'no') === 'yes';
+    }
+
+
+    /**
+     * Number of default link expire days
+     *
+     * @return int
+     */
+    public function shareApiLinkDefaultExpireDays() {
+        return (int)$this->config->getAppValue('core', 'shareapi_expire_after_n_days', '7');
+    }
+
+    /**
+     * Is default internal expire date enabled
+     *
+     * @return bool
+     */
+    public function shareApiInternalDefaultExpireDate(): bool {
+        return $this->config->getAppValue('core', 'shareapi_default_internal_expire_date', 'no') === 'yes';
+    }
+
+    /**
+     * Is default remote expire date enabled
+     *
+     * @return bool
+     */
+    public function shareApiRemoteDefaultExpireDate(): bool {
+        return $this->config->getAppValue('core', 'shareapi_default_remote_expire_date', 'no') === 'yes';
+    }
+
+    /**
+     * Is default expire date enforced
+     *
+     * @return bool
+     */
+    public function shareApiInternalDefaultExpireDateEnforced(): bool {
+        return $this->shareApiInternalDefaultExpireDate() &&
+            $this->config->getAppValue('core', 'shareapi_enforce_internal_expire_date', 'no') === 'yes';
+    }
+
+    /**
+     * Is default expire date enforced for remote shares
+     *
+     * @return bool
+     */
+    public function shareApiRemoteDefaultExpireDateEnforced(): bool {
+        return $this->shareApiRemoteDefaultExpireDate() &&
+            $this->config->getAppValue('core', 'shareapi_enforce_remote_expire_date', 'no') === 'yes';
+    }
+
+    /**
+     * Number of default expire days
+     *
+     * @return int
+     */
+    public function shareApiInternalDefaultExpireDays(): int {
+        return (int)$this->config->getAppValue('core', 'shareapi_internal_expire_after_n_days', '7');
+    }
+
+    /**
+     * Number of default expire days for remote shares
+     *
+     * @return int
+     */
+    public function shareApiRemoteDefaultExpireDays(): int {
+        return (int)$this->config->getAppValue('core', 'shareapi_remote_expire_after_n_days', '7');
+    }
+
+    /**
+     * Allow public upload on link shares
+     *
+     * @return bool
+     */
+    public function shareApiLinkAllowPublicUpload() {
+        return $this->config->getAppValue('core', 'shareapi_allow_public_upload', 'yes') === 'yes';
+    }
+
+    /**
+     * check if user can only share with group members
+     *
+     * @return bool
+     */
+    public function shareWithGroupMembersOnly() {
+        return $this->config->getAppValue('core', 'shareapi_only_share_with_group_members', 'no') === 'yes';
+    }
+
+    /**
+     * If shareWithGroupMembersOnly is enabled, return an optional
+     * list of groups that must be excluded from the principle of
+     * belonging to the same group.
+     *
+     * @return array
+     */
+    public function shareWithGroupMembersOnlyExcludeGroupsList() {
+        if (!$this->shareWithGroupMembersOnly()) {
+            return [];
+        }
+        $excludeGroups = $this->config->getAppValue('core', 'shareapi_only_share_with_group_members_exclude_group_list', '');
+        return json_decode($excludeGroups, true) ?? [];
+    }
+
+    /**
+     * Check if users can share with groups
+     *
+     * @return bool
+     */
+    public function allowGroupSharing() {
+        return $this->config->getAppValue('core', 'shareapi_allow_group_sharing', 'yes') === 'yes';
+    }
+
+    public function allowEnumeration(): bool {
+        return $this->config->getAppValue('core', 'shareapi_allow_share_dialog_user_enumeration', 'yes') === 'yes';
+    }
+
+    public function limitEnumerationToGroups(): bool {
+        return $this->allowEnumeration() &&
+            $this->config->getAppValue('core', 'shareapi_restrict_user_enumeration_to_group', 'no') === 'yes';
+    }
+
+    public function limitEnumerationToPhone(): bool {
+        return $this->allowEnumeration() &&
+            $this->config->getAppValue('core', 'shareapi_restrict_user_enumeration_to_phone', 'no') === 'yes';
+    }
+
+    public function allowEnumerationFullMatch(): bool {
+        return $this->config->getAppValue('core', 'shareapi_restrict_user_enumeration_full_match', 'yes') === 'yes';
+    }
+
+    public function matchEmail(): bool {
+        return $this->config->getAppValue('core', 'shareapi_restrict_user_enumeration_full_match_email', 'yes') === 'yes';
+    }
+
+    public function ignoreSecondDisplayName(): bool {
+        return $this->config->getAppValue('core', 'shareapi_restrict_user_enumeration_full_match_ignore_second_dn', 'no') === 'yes';
+    }
+
+    public function allowCustomTokens(): bool {
+        return $this->appConfig->getValueBool('core', 'shareapi_allow_custom_tokens', false);
+    }
+
+    public function currentUserCanEnumerateTargetUser(?IUser $currentUser, IUser $targetUser): bool {
+        if ($this->allowEnumerationFullMatch()) {
+            return true;
+        }
+
+        if (!$this->allowEnumeration()) {
+            return false;
+        }
+
+        if (!$this->limitEnumerationToPhone() && !$this->limitEnumerationToGroups()) {
+            // Enumeration is enabled and not restricted: OK
+            return true;
+        }
+
+        if (!$currentUser instanceof IUser) {
+            // Enumeration restrictions require an account
+            return false;
+        }
+
+        // Enumeration is limited to phone match
+        if ($this->limitEnumerationToPhone() && $this->knownUserService->isKnownToUser($currentUser->getUID(), $targetUser->getUID())) {
+            return true;
+        }
+
+        // Enumeration is limited to groups
+        if ($this->limitEnumerationToGroups()) {
+            $currentUserGroupIds = $this->groupManager->getUserGroupIds($currentUser);
+            $targetUserGroupIds = $this->groupManager->getUserGroupIds($targetUser);
+            if (!empty(array_intersect($currentUserGroupIds, $targetUserGroupIds))) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Copied from \OC_Util::isSharingDisabledForUser
+     *
+     * TODO: Deprecate function from OC_Util
+     *
+     * @param string $userId
+     * @return bool
+     */
+    public function sharingDisabledForUser($userId) {
+        return $this->shareDisableChecker->sharingDisabledForUser($userId);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function outgoingServer2ServerSharesAllowed() {
+        return $this->config->getAppValue('files_sharing', 'outgoing_server2server_share_enabled', 'yes') === 'yes';
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function outgoingServer2ServerGroupSharesAllowed() {
+        return $this->config->getAppValue('files_sharing', 'outgoing_server2server_group_share_enabled', 'no') === 'yes';
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function shareProviderExists($shareType) {
+        try {
+            $this->factory->getProviderForType($shareType);
+        } catch (ProviderException $e) {
+            return false;
+        }
+
+        return true;
+    }
+
+    public function registerShareProvider(string $shareProviderClass): void {
+        $this->factory->registerProvider($shareProviderClass);
+    }
+
+    public function getAllShares(): iterable {
+        $providers = $this->factory->getAllProviders();
+
+        foreach ($providers as $provider) {
+            yield from $provider->getAllShares();
+        }
+    }
+
+    public function generateToken(): string {
+        // Initial token length
+        $tokenLength = \OC\Share\Helper::getTokenLength();
+
+        do {
+            $tokenExists = false;
+
+            for ($i = 0; $i <= 2; $i++) {
+                // Generate a new token
+                $token = $this->secureRandom->generate(
+                    $tokenLength,
+                    ISecureRandom::CHAR_HUMAN_READABLE,
+                );
+
+                try {
+                    // Try to fetch a share with the generated token
+                    $this->getShareByToken($token);
+                    $tokenExists = true; // Token exists, we need to try again
+                } catch (ShareNotFound $e) {
+                    // Token is unique, exit the loop
+                    $tokenExists = false;
+                    break;
+                }
+            }
+
+            // If we've reached the maximum attempts and the token still exists, increase the token length
+            if ($tokenExists) {
+                $tokenLength++;
+
+                // Check if the token length exceeds the maximum allowed length
+                if ($tokenLength > \OC\Share\Constants::MAX_TOKEN_LENGTH) {
+                    throw new ShareTokenException('Unable to generate a unique share token. Maximum token length exceeded.');
+                }
+            }
+        } while ($tokenExists);
+
+        return $token;
+    }
 }