1 files changed, 136 insertions, 0 deletions
diff --git a/apps/encryption/lib/Util.php b/apps/encryption/lib/Util.php
new file mode 100644
index 00000000000..ccbdcdcb242
--- /dev/null
+++ b/apps/encryption/lib/Util.php
@@ -0,0 +1,136 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+namespace OCA\Encryption;
+
+use OC\Files\Storage\Storage;
+use OC\Files\View;
+use OCA\Encryption\Crypto\Crypt;
+use OCP\Files\Storage\IStorage;
+use OCP\IConfig;
+use OCP\IUser;
+use OCP\IUserManager;
+use OCP\IUserSession;
+use OCP\PreConditionNotMetException;
+
+class Util {
+	private IUser|false $user;
+
+	public function __construct(
+		private View $files,
+		private Crypt $crypt,
+		IUserSession $userSession,
+		private IConfig $config,
+		private IUserManager $userManager,
+	) {
+		$this->user = $userSession->isLoggedIn() ? $userSession->getUser() : false;
+	}
+
+	/**
+	 * check if recovery key is enabled for user
+	 *
+	 * @param string $uid
+	 * @return bool
+	 */
+	public function isRecoveryEnabledForUser($uid) {
+		$recoveryMode = $this->config->getUserValue($uid,
+			'encryption',
+			'recoveryEnabled',
+			'0');
+
+		return ($recoveryMode === '1');
+	}
+
+	/**
+	 * check if the home storage should be encrypted
+	 *
+	 * @return bool
+	 */
+	public function shouldEncryptHomeStorage() {
+		$encryptHomeStorage = $this->config->getAppValue(
+			'encryption',
+			'encryptHomeStorage',
+			'1'
+		);
+
+		return ($encryptHomeStorage === '1');
+	}
+
+	/**
+	 * set the home storage encryption on/off
+	 *
+	 * @param bool $encryptHomeStorage
+	 */
+	public function setEncryptHomeStorage($encryptHomeStorage) {
+		$value = $encryptHomeStorage ? '1' : '0';
+		$this->config->setAppValue(
+			'encryption',
+			'encryptHomeStorage',
+			$value
+		);
+	}
+
+	/**
+	 * check if master key is enabled
+	 */
+	public function isMasterKeyEnabled(): bool {
+		$userMasterKey = $this->config->getAppValue('encryption', 'useMasterKey', '1');
+		return ($userMasterKey === '1');
+	}
+
+	/**
+	 * @param $enabled
+	 * @return bool
+	 */
+	public function setRecoveryForUser($enabled) {
+		$value = $enabled ? '1' : '0';
+
+		try {
+			$this->config->setUserValue($this->user->getUID(),
+				'encryption',
+				'recoveryEnabled',
+				$value);
+			return true;
+		} catch (PreConditionNotMetException $e) {
+			return false;
+		}
+	}
+
+	/**
+	 * @param string $uid
+	 * @return bool
+	 */
+	public function userHasFiles($uid) {
+		return $this->files->file_exists($uid . '/files');
+	}
+
+	/**
+	 * get owner from give path, path relative to data/ expected
+	 *
+	 * @param string $path relative to data/
+	 * @return string
+	 * @throws \BadMethodCallException
+	 */
+	public function getOwner($path) {
+		$owner = '';
+		$parts = explode('/', $path, 3);
+		if (count($parts) > 1) {
+			$owner = $parts[1];
+			if ($this->userManager->userExists($owner) === false) {
+				throw new \BadMethodCallException('Unknown user: '
+				. 'method expects path to a user folder relative to the data folder');
+			}
+		}
+
+		return $owner;
+	}
+
+	public function getStorage(string $path): ?IStorage {
+		return $this->files->getMount($path)->getStorage();
+	}
+
+}