How to authenticate login using org.freedesktop.login1

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Subject: How to authenticate login using org.freedesktop.login1

From: "Lal, Arun" <arun.lal@xxxxxxxxx>

Date: Wed, 24 May 2023 06:42:05 +0000

Accept-language: en-US

Cc: "Ayushi, Smriti" <smriti.ayushi@xxxxxxxxx>, "Shah, Nirav J2" <nirav.j2.shah@xxxxxxxxx>

Hi All,

I was trying to authenticate a user from a deamon running in my machine. And I found systemd-login can be used.

I went through documentation for interface org.freedesktop.login1, but I am not clear on how it can be used.

Lets assume that there is a deamon called xyz running in my device which has a webserver component. And it receives a request to login from https side.

And once the deamon has username and password, I would like to invoke some dbus calls to org.freedesktop.login1 to perform the authentication.

Assuming org.freedesktop.systemd1.Privileged("true"), I see that I can use CreateSession and ReleaseSession from interface org.freedesktop.login1.Manager.

But I have some doubts:

Is this recommended approach.
I am not seeing an argument in CreateSession method that takes password, what am I missing here?

Thanks in advance 😊

Regards,

Arun Lal K M