generate gskey on first use

Signed-off-by: Maxence Lange <maxence@artificial-owl.com>

Author: ArtificialOwl

lib/Service/ConfigService.php

@@ -49,6 +49,7 @@ class ConfigService {
 	const CIRCLES_NON_SSL_LOCAL = 'local_is_non_ssl';
 	const CIRCLES_SELF_SIGNED = 'self_signed_cert';
 	const LOCAL_CLOUD_ID = 'local_cloud_id';
+	const CIRCLES_LOCAL_GSKEY = 'local_gskey';
 	const CIRCLES_ACTIVITY_ON_CREATION = 'creation_activity';
 	const CIRCLES_SKIP_INVITATION_STEP = 'skip_invitation_to_closed_circles';
 	const CIRCLES_SEARCH_FROM_COLLABORATOR = 'search_from_collaborator';
@@ -76,6 +77,7 @@ class ConfigService {
 		self::CIRCLES_ALLOW_LINKED_GROUPS      => '0',
 		self::CIRCLES_ALLOW_FEDERATED_CIRCLES  => '0',
 		self::CIRCLES_GS_ENABLED               => '0',
+		self::CIRCLES_LOCAL_GSKEY              => '',
 		self::CIRCLES_ALLOW_NON_SSL_LINKS      => '0',
 		self::CIRCLES_NON_SSL_LOCAL            => '0',
 		self::CIRCLES_SELF_SIGNED              => '0',

lib/Service/GlobalScaleService.php

@@ -182,11 +182,14 @@ public function getGlobalScaleEvent(GSEvent $event): AGlobalScaleEvent {
 	 * @return string
 	 */
 	public function getKey(): string {
-		// TODO: include a webfinger loader in core to share public keys
 		try {
 			$key = $this->configService->getGSStatus(ConfigService::GS_KEY);
 		} catch (GSStatusException $e) {
-			$key = $this->configService->getSystemValue('instanceid');
+			$key = $this->configService->getAppValue(ConfigService::CIRCLES_LOCAL_GSKEY);
+			if ($key === '') {
+				$key = $this->token(31);
+				$this->configService->setAppValue(ConfigService::CIRCLES_LOCAL_GSKEY, $key);
+			}
 		}
 
 		return md5('gskey:' . $key);