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Nextcloud version (eg, 20.0.5): 28.0.1
Operating system and version (eg, Ubuntu 20.04): Debian 12
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.57 (Debian)
PHP version (eg, 7.4): 8.2.7
The issue you are facing:
Hi,
I’m currently running tests on a Nextcloud instance recently deployed by a colleague. During these tests I looked at whether there was a limit to the number of characters that could be entered when a user used the functionality to change their password.
I first tried with 800 characters and received a pop-up message ‘Unable to change personal password’. After a bit of research I came across a post indicating that the limit was set at 469, which is correct because I only get a pop-up after 470 characters.
Nextcloud | Report #1727424 - No password length limit when creating a user as an administrator | HackerOne
Also, I see in the hardening guidelines that bcrypt is only supposed to consider the first 72 characters which doesn’t seem to be the case here.
The problem is that if a user changes their password to a new one of between 215 and 469 characters, the server won’t display a pop-up, but will still accept the password (an error 500 is visible when inspecting the Network tab) and the user will no longer be able to log in.
When the user enters their credentials and logs in, they are automatically returned to the ‘Internal Server Error’ page and cannot do anything. The administrator then has to change their password to unblock it.
Do you think this is a problem on our side or could it be a bug?
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- Login with a user and access
/settings/user/security - Change password with one whose length is between 215 and 469 characters
2.1 Inspect Network tab - Attempt to reconnect with the new password
The output of your Nextcloud log in Admin > Logging:
Formatted
[index] Error: base64_encode(): Argument #1 ($string) must be of type string, null given in file '/var/www/nextcloud/lib/private/Authentication/Token/PublicKeyTokenProvider.php' line 400
POST /index.php/login
from x.x.x.x by xxxx at Apr 26, 2024, 11:18:19 AM
Raw
{"reqId":"ZitxWupCQwENSxkXUse59gAAAAM","level":3,"time":"2024-04-26T09:18:19+00:00","remoteAddr":"x.x.x.x","user":"xxxx","app":"index","method":"POST","url":"/index.php/login","message":"base64_encode(): Argument #1 ($string) must be of type string, null given in file '/var/www/nextcloud/lib/private/Authentication/Token/PublicKeyTokenProvider.php' line 400","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36","version":"28.0.1.1","exception":{"Exception":"Exception","Message":"base64_encode(): Argument #1 ($string) must be of type string, null given in file '/var/www/nextcloud/lib/private/Authentication/Token/PublicKeyTokenProvider.php' line 400","Code":0,"Trace":[{"file":"/var/www/nextcloud/lib/private/AppFramework/App.php","line":184,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Route/Router.php","line":315,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/nextcloud/lib/base.php","line":1069,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/nextcloud/index.php","line":39,"function":"handleRequest","class":"OC","type":"::"}],"File":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","Line":169,"Previous":{"Exception":"TypeError","Message":"base64_encode(): Argument #1 ($string) must be of type string, null given","Code":0,"Trace":[{"file":"/var/www/nextcloud/lib/private/Authentication/Token/PublicKeyTokenProvider.php","line":400,"function":"base64_encode"},{"file":"/var/www/nextcloud/lib/private/Authentication/Token/PublicKeyTokenProvider.php","line":531,"function":"encryptPassword","class":"OC\\Authentication\\Token\\PublicKeyTokenProvider","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/public/AppFramework/Db/TTransactional.php","line":63,"function":"OC\\Authentication\\Token\\{closure}","class":"OC\\Authentication\\Token\\PublicKeyTokenProvider","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/Authentication/Token/PublicKeyTokenProvider.php","line":500,"function":"atomic","class":"OC\\Authentication\\Token\\PublicKeyTokenProvider","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Token/Manager.php","line":245,"function":"updatePasswords","class":"OC\\Authentication\\Token\\PublicKeyTokenProvider","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/Authentication/Listeners/UserLoggedInListener.php","line":60,"function":"updatePasswords","class":"OC\\Authentication\\Token\\Manager","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/ServiceEventListener.php","line":86,"function":"handle","class":"OC\\Authentication\\Listeners\\UserLoggedInListener","type":"->"},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":230,"function":"__invoke","class":"OC\\EventDispatcher\\ServiceEventListener","type":"->"},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":59,"function":"callListeners","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":94,"function":"dispatch","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":106,"function":"dispatch","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/User/Session.php","line":392,"function":"dispatchTyped","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/CompleteLoginCommand.php","line":39,"function":"completeLogin","class":"OC\\User\\Session","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/ALoginCommand.php","line":39,"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":39,"function":"process","class":"OC\\Authentication\\Login\\LoggedInCheckCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/EmailLoginCommand.php","line":68,"function":"processNextOrFinishSuccessfully","class":"OC\\Authentication\\Login\\ALoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/ALoginCommand.php","line":39,"function":"process","class":"OC\\Authentication\\Login\\EmailLoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/UidLoginCommand.php","line":53,"function":"processNextOrFinishSuccessfully","class":"OC\\Authentication\\Login\\ALoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/ALoginCommand.php","line":39,"function":"process","class":"OC\\Authentication\\Login\\UidLoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/UserDisabledCheckCommand.php","line":57,"function":"processNextOrFinishSuccessfully","class":"OC\\Authentication\\Login\\ALoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/ALoginCommand.php","line":39,"function":"process","class":"OC\\Authentication\\Login\\UserDisabledCheckCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/PreLoginHookCommand.php","line":52,"function":"processNextOrFinishSuccessfully","class":"OC\\Authentication\\Login\\ALoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/Chain.php","line":107,"function":"process","class":"OC\\Authentication\\Login\\PreLoginHookCommand","type":"->"},{"file":"/var/www/nextcloud/core/Controller/LoginController.php","line":307,"function":"process","class":"OC\\Authentication\\Login\\Chain","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":230,"function":"tryLogin","class":"OC\\Core\\Controller\\LoginController","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":137,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/App.php","line":184,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Route/Router.php","line":315,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/nextcloud/lib/base.php","line":1069,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/nextcloud/index.php","line":39,"function":"handleRequest","class":"OC","type":"::"}],"File":"/var/www/nextcloud/lib/private/Authentication/Token/PublicKeyTokenProvider.php","Line":400},"message":"base64_encode(): Argument #1 ($string) must be of type string, null given in file '/var/www/nextcloud/lib/private/Authentication/Token/PublicKeyTokenProvider.php' line 400","exception":[],"CustomMessage":"base64_encode(): Argument #1 ($string) must be of type string, null given in file '/var/www/nextcloud/lib/private/Authentication/Token/PublicKeyTokenProvider.php' line 400"},"id":"662b7787ace93"}
config.php:
<?php
$CONFIG = array (
'instanceid' => 'xxxx',
'passwordsalt' => 'xxxx',
'secret' => 'xxxx',
'trusted_domains' =>
array (
0 => 'x.x.x.x',
1 => 'nextcloud.test.loc',
),
'datadirectory' => '/var/www/nextcloud/data',
'dbtype' => 'mysql',
'version' => '28.0.1.1',
'overwrite.cli.url' => 'https://nextcloud.test.loc',
'installed' => true,
'has_internet_connection' => false,
'debug' => 'false',
'maintenance' => false,
'dbname' => 'xxxx',
'dbhost' => '127.0.0.1',
'dbuser' => 'xxxx',
'dbpassword' => 'xxxx',
'mail_from_address' => 'xxxx',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_domain' => 'xxxx',
'mail_smtphost' => 'xxxx',
'mail_smtpport' => 'xxxx',
'mail_smtpsecure' => 'ssl',
'mail_smtpauth' => 1,
'mail_smtpname' => 'xxxx',
'mail_smtppassword' => 'xxxx',
);
Browser console error:
encryption.js:12 Uncaught ReferenceError: OC is not defined
at encryption.js:12:1
(anonymous) @ encryption.js:12
Thanks in advance