[Bug]: linksharing by mail broken with "always ask for password"

[c-0815]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

after upgrading to 27.1.7.2 sharing to external users by mail doesn't work anymore, it doesn't matter if password enforcement is enabled.
"User receives message: "Error creating the share: Passwords are enforced for link and mail shares!

Steps to reproduce

1. in Administrationmenu-> Sharing "Always ask for a password" is enabled, "Enforce password protection" is disabled
2. in Administrationmenu->Security Password Policy settings are 0 or disabled
   (it doesn't matter if passwort policy is active)
3. create a folder and got to the sahring menu as user. Type in external mail and fill out the sharing properties
4. the password is hidden
5. submit "save share"
6. "User receives message: "Error creating the share: Passwords are enforced for link and mail shares!
7. the share hasn't created :-(

only with disabled option "Always ask for a password" I the share is created

Expected behavior

a share by mail is created and no error message occures

Installation method

Community Manual installation with Archive

Nextcloud Server version

27

Operating system

RHEL/CentOS

PHP engine version

PHP 8.2

Web server

Apache (supported)

Database engine version

MariaDB

Is this bug present after an update or on a fresh install?

Updated from a MINOR version (ex. 22.1 to 22.2)

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

.

[c-0815]

error occures in 28.0.3 too

[c-0815]

I discovered that the bug doesn't occure when I diable all default share permissions. So its a combination of the password settings above and these default share permissions. this happens in current the current version 27 and 28. I hope this helps fixing it.

[blizzz]

Mh, I cannot reproduce this behavior. These settings should be correct according to your repro steps?

[c-0815]

Have you also enabled some default share permissions?

[blizzz]

Have you also enabled some default share permissions?

Yes, all were set.

I can only reproduce it with "Enforce password protection" enabled.

[c-0815]

Interesting. In our nextcloud "Enforcing password protection " is enabled. When I checked various combinations, finally this option was disabled and after I additionally disabled all the defaults, the behavior was better. I think there is a bigger problem with the js code of the share menu, because after the update to 27.1.0.7 also the "share by link" option doesn't refresh after enabling it, but I wasn't sure if this has the same cause, so I didn't mentioned it.
Anyway you reproduced it partly and hopefully it helps to find the bug.
In case I should test something else just ask.

best regards

[blizzz]

There is a fix in #44184 you might when to check this. This issue is then possibly a dup of #43919.

[c-0815]

I doublechecked and agree with you. Enforcing password protection has to be enabled to trigger it.

[c-0815]

No, I discovered the same Problem in 28.0.3.

[skjnldsv]

Yep, fixed in upcoming versions 28.0.4