Re: PAM session setup and environment variables

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On Tue, 17 Dec 2024, Michal Sekletar wrote:

> On Tue, Dec 17, 2024 at 5:40 AM Damien Miller <djm@xxxxxxxxxxx> wrote:
> 
> > User-specified environment variables are not propogated to the
> > environment where sshd invokes PAM modules because the SSH protocol
> > sends them at the time a session is opened, well after authentication
> > has completed. At best, they could be made available to the PAM
> > session modules but there's no way to make user-specified environment
> > available to auth and account modules.
> 
> I am interested in pam_systemd.so which is a session module. Hence,
> would you accept a patch that exposes these variables during this
> phase of a session setup?

We could potentially allow-list some variables, but I'd like to get
some input from people who (for example) maintain PAM for distributions
on what is acceptable.

-d
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