Delete config.php but no backup

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1

I accidentally deleted config.php.
I created the config.php file again.
However, logging in does not work properly.
It is believed that the problem is probably caused by the secret being changed.

I am curious about how to apply a new secret or how to initialize data using an existing secret.

NextCloud : 25.0.13
Nginx + php81-fpm + mariadb(ver 10)

{"reqId":"tqjebhDR8Ee4xhUP62CH","level":2,"time":"2024-08-23T15:49:56+00:00","remoteAddr":"119.192.196.76","user":"--","app":"no app in context","method":"POST","url":"/login","message":"Login failed: admin (Remote IP: 119.192.196.76)","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36","version":"25.0.13.2","data":[]}
{"reqId":"crxQwV8Sf77YyBlEVnup","level":3,"time":"2024-08-23T15:50:02+00:00","remoteAddr":"119.192.196.76","user":"admin","app":"index","method":"POST","url":"/login","message":"hash_hkdf(): Argument #2 ($key) cannot be empty in file '/var/www/nextcloud/lib/private/Security/Crypto.php' line 160","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36","version":"25.0.13.2","exception":{"Exception":"Exception","Message":"hash_hkdf(): Argument #2 ($key) cannot be empty in file '/var/www/nextcloud/lib/private/Security/Crypto.php' line 160","Code":0,"Trace":[{"file":"/var/www/nextcloud/lib/private/AppFramework/App.php","line":172,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Route/Router.php","line":298,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/nextcloud/lib/base.php","line":1053,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/nextcloud/index.php","line":36,"function":"handleRequest","class":"OC","type":"::"}],"File":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","Line":165,"Previous":{"Exception":"ValueError","Message":"hash_hkdf(): Argument #2 ($key) cannot be empty","Code":0,"Trace":[{"file":"/var/www/nextcloud/lib/private/Security/Crypto.php","line":160,"function":"hash_hkdf"},{"file":"/var/www/nextcloud/lib/private/Security/Crypto.php","line":134,"function":"decryptWithoutSecret","class":"OC\\Security\\Crypto","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/files_external/lib/Service/DBConfigService.php","line":530,"function":"decrypt","class":"OC\\Security\\Crypto","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/files_external/lib/Service/DBConfigService.php","line":510,"function":"decryptValue","class":"OCA\\Files_External\\Service\\DBConfigService","type":"->","args":["*** sensitive parameters replaced ***"]},{"function":"OCA\\Files_External\\Service\\{closure}","class":"OCA\\Files_External\\Service\\DBConfigService","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/files_external/lib/Service/DBConfigService.php","line":508,"function":"array_map"},{"function":"createKeyValueMap","class":"OCA\\Files_External\\Service\\DBConfigService","type":"->"},{"file":"/var/www/nextcloud/apps/files_external/lib/Service/DBConfigService.php","line":486,"function":"array_map"},{"file":"/var/www/nextcloud/apps/files_external/lib/Service/DBConfigService.php","line":421,"function":"getConfigForMounts","class":"OCA\\Files_External\\Service\\DBConfigService","type":"->"},{"file":"/var/www/nextcloud/apps/files_external/lib/Service/DBConfigService.php","line":116,"function":"getMountsFromQuery","class":"OCA\\Files_External\\Service\\DBConfigService","type":"->"},{"file":"/var/www/nextcloud/apps/files_external/lib/Service/UserGlobalStoragesService.php","line":194,"function":"getMountsForUser","class":"OCA\\Files_External\\Service\\DBConfigService","type":"->"},{"file":"/var/www/nextcloud/apps/files_external/lib/Config/ConfigAdapter.php","line":120,"function":"getAllStoragesForUser","class":"OCA\\Files_External\\Service\\UserGlobalStoragesService","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Config/MountProviderCollection.php","line":124,"function":"getMountsForUser","class":"OCA\\Files_External\\Config\\ConfigAdapter","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/SetupManager.php","line":226,"function":"addMountForUser","class":"OC\\Files\\Config\\MountProviderCollection","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/SetupManager.php","line":318,"function":"OC\\Files\\{closure}","class":"OC\\Files\\SetupManager","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/Files/SetupManager.php","line":227,"function":"setupForUserWith","class":"OC\\Files\\SetupManager","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Filesystem.php","line":379,"function":"setupForUser","class":"OC\\Files\\SetupManager","type":"->"},{"file":"/var/www/nextcloud/lib/private/Cache/File.php","line":57,"function":"initMountPoints","class":"OC\\Files\\Filesystem","type":"::"},{"file":"/var/www/nextcloud/lib/private/Cache/File.php","line":178,"function":"getStorage","class":"OC\\Cache\\File","type":"->"},{"file":"/var/www/nextcloud/lib/base.php","line":856,"function":"gc","class":"OC\\Cache\\File","type":"->"},{"function":"{closure}","class":"OC","type":"::","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/Hooks/EmitterTrait.php","line":106,"function":"call_user_func_array"},{"file":"/var/www/nextcloud/lib/private/Hooks/PublicEmitter.php","line":40,"function":"emit","class":"OC\\Hooks\\BasicEmitter","type":"->"},{"file":"/var/www/nextcloud/lib/private/User/Session.php","line":401,"function":"emit","class":"OC\\Hooks\\PublicEmitter","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/CompleteLoginCommand.php","line":44,"function":"completeLogin","class":"OC\\User\\Session","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/ALoginCommand.php","line":40,"function":"process","class":"OC\\Authentication\\Login\\CompleteLoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/LoggedInCheckCommand.php","line":60,"function":"processNextOrFinishSuccessfully","class":"OC\\Authentication\\Login\\ALoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/ALoginCommand.php","line":40,"function":"process","class":"OC\\Authentication\\Login\\LoggedInCheckCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/EmailLoginCommand.php","line":70,"function":"processNextOrFinishSuccessfully","class":"OC\\Authentication\\Login\\ALoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/ALoginCommand.php","line":40,"function":"process","class":"OC\\Authentication\\Login\\EmailLoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/UidLoginCommand.php","line":54,"function":"processNextOrFinishSuccessfully","class":"OC\\Authentication\\Login\\ALoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/ALoginCommand.php","line":40,"function":"process","class":"OC\\Authentication\\Login\\UidLoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/UserDisabledCheckCommand.php","line":58,"function":"processNextOrFinishSuccessfully","class":"OC\\Authentication\\Login\\ALoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/ALoginCommand.php","line":40,"function":"process","class":"OC\\Authentication\\Login\\UserDisabledCheckCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/PreLoginHookCommand.php","line":53,"function":"processNextOrFinishSuccessfully","class":"OC\\Authentication\\Login\\ALoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/Chain.php","line":108,"function":"process","class":"OC\\Authentication\\Login\\PreLoginHookCommand","type":"->"},{"file":"/var/www/nextcloud/core/Controller/LoginController.php","line":330,"function":"process","class":"OC\\Authentication\\Login\\Chain","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":225,"function":"tryLogin","class":"OC\\Core\\Controller\\LoginController","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":133,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/App.php","line":172,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Route/Router.php","line":298,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/nextcloud/lib/base.php","line":1053,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/nextcloud/index.php","line":36,"function":"handleRequest","class":"OC","type":"::"}],"File":"/var/www/nextcloud/lib/private/Security/Crypto.php","Line":160},"CustomMessage":"--"}}
2

using you logs I found this topic [bug] hash_hkdf(): Argument #2 ($key) cannot be empty in .../lib/private/Security/Crypto.php:97 - #4 by soilah and corresponding GH [Bug]: hash_hkdf(): Argument #2 ($key) cannot be empty · Issue #34012 · nextcloud/server · GitHub but you post don’t contain enough details to understand if the secret existed before or not.

If you used encryption-server check if this repo helps to recover files: GitHub - nextcloud/encryption-recovery-tools: This project contains tools to recover files that have been encrypted with the Nextcloud End-to-End Encryption or Nextcloud Server-Side Encryption.

In all cases it more recommended to upgrade to a supported version > nc27