On Tue, Jun 11, 2019 at 1:08 PM Josef Moellers <jmoell...@suse.de> wrote:
> Hi, > > We have seen this problem: when you open a gnome-terminal, then the > shell in that terminal will not have the same keyring (created by > pam_keyinit.so) as the one eg in an xterm. This is due to the fact that > the xterm ist started by the standard fork/exec mechanism which passes > the keyring down to the children and the gnome-teminal (actually > gnome-terminal-server) is started by sending a dbus message to some > instance which the starts the terminal process. > > AAMOF the gnome-terminal does not even have a keyring, so if one asks > for it ("keyctl show @s"), it is created on the fly. This causes the > kernel to create a keyring as a "user session keyring" while the GNOME > session (and thus the xterm) has a "session keyring". > > Has anyone seen this and/or, most important question, does anyone have > an idea how to solve this? > > I know that, strictly speaking, this is not a systemd question, but > we're trying to probe many sources to see if anyone has a solution. > > IIRC the usual advice by Lennart is to use the user-wide @u keyring instead of session keyrings. (Programs searching in @s should automatically find credentials added to @u, as pam_keyinit creates the link by default.) A few years ago I have asked one affected kernel subsystem (cifs) to allow using @u. They had no interest in doing so. I have since then decided to just give up on being able to use cifs -o multiuser. (See also: GitHub issue regarding AFS PAGs.) You could probably alter pam_keyinit.so to allow joining an existing session keyring (which is IIRC possible in the API). That way your graphical sessions Ipam.d/gdm) would join the same @s created by systemd --user instance (pam.d/systemd-user), which is the same one used by dbus-daemon. -- Mantas Mikulėnas
_______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel