External storage will prompt for password but always tell you it's the wrong password

[skjnldsv]

This issue have been created to gather the aftermath of a few fixes that seems to work for some but not for all.
Initial regression PR: #50910

References

• [Bug]: Can't authenticate when Nextcloud want to confirm password #51637
• [Bug]: External storage will prompt for password but always tell you it's the wrong password #51919
• fix: Check that user actually can validate password for js #50465 (31, 30 & 29)
• Disable password confirmation not working zorn-v/nextcloud-social-login#494
• https://www.youtube.com/watch?v=Iqog7N9cRNU

Various findings

• First issue was an ldap/oidc issue where the password should NOT have been requested, but the script was not handling this properly. This got fixed by fix: Check that user actually can validate password for js #50465
• Second related issue was that the password was NOT properly forwarded to the backend. It seemed to be an issue on some setups where mod_rewrite and/or mod_env were NOT enabled. This seems to be mandatory or else the AUTH header is empty

  server/lib/private/AppFramework/Middleware/Security/PasswordConfirmationMiddleware.php

  Line 81 in 7be047a

  $authHeader = $this->request->getHeader('Authorization');

• Third issue was a frontend setting saving issue, fixed by fix(external_storage): fix settings save #51320