|
|
|
|
KDE can be configured to support the PAM ("Pluggable Authentication
|
|
|
|
|
Modules") system for password checking by the display manager tdm and
|
|
|
|
|
by the screen saver tdescreensaver (for unlocking the display).
|
|
|
|
|
|
|
|
|
|
PAM is a flexible application-transparent configurable user-authentication
|
|
|
|
|
system found on FreeBSD, Solaris, and Linux (and maybe other unixes).
|
|
|
|
|
|
|
|
|
|
Information about PAM may be found on its homepage
|
|
|
|
|
http://www.kernel.org/pub/linux/libs/pam/
|
|
|
|
|
(Despite the location, this information is NOT Linux-specific.)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Known Solaris Issues:
|
|
|
|
|
--------------------
|
|
|
|
|
|
|
|
|
|
For compiling PAM support on Solaris, PAM_MESSAGE_NONCONST must
|
|
|
|
|
be defined. This should now be handled automatically by the
|
|
|
|
|
configure script.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Using PAM
|
|
|
|
|
---------
|
|
|
|
|
|
|
|
|
|
By default, PAM is automatically used, if it is found. Use
|
|
|
|
|
./configure --without-pam to disable it.
|
|
|
|
|
|
|
|
|
|
If PAM is found, KDE usually uses the PAM service "kde". You may
|
|
|
|
|
override it for all KDE programs by using --with-pam=<service> and/or
|
|
|
|
|
individually by using --with-<prog>-pam=<service>, where <prog> is
|
|
|
|
|
one of tdm, kcp and kss (for tdm, kcheckpass and tdescreensaver).
|
|
|
|
|
|
|
|
|
|
"make install" will attempt to create suitable service definitions; either
|
|
|
|
|
by putting files into /etc/pam.d/ or by adding text to /etc/pam.conf. The
|
|
|
|
|
services are just copies of the "login" service.
|
|
|
|
|
You may want to edit these definitions to meet your needs.
|
|
|
|
|
There are also two example service definitions in this directory -
|
|
|
|
|
kde.pamd and tdescreensaver.pamd - but don't just copy them!
|
|
|
|
|
If the services are misconfigured, you will NOT be able to login via TDM
|
|
|
|
|
and/or unlock a locked screen!
|
|
|
|
|
|
|
|
|
|
If there is ever any doubt about which PAM service a program was
|
|
|
|
|
compiled with, it can be determined by examining the PAM-generated
|
|
|
|
|
entries in the system log associated with tdm logins or tdescreensaver
|
|
|
|
|
authentication failures.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
PAM configuration files have four types of entries for each service:
|
|
|
|
|
|
|
|
|
|
type used by tdm used by tdescreensaver
|
|
|
|
|
---- ----------- --------------------
|
|
|
|
|
auth x x
|
|
|
|
|
account x
|
|
|
|
|
password x
|
|
|
|
|
session x
|
|
|
|
|
|
|
|
|
|
There may be more than one entry of each type. Check existing PAM
|
|
|
|
|
configuration files and PAM documentation on your system for guidance as
|
|
|
|
|
to what entries to make. If you call a PAM service that is not
|
|
|
|
|
configured, the default action of PAM is likely to be denial of service.
|
|
|
|
|
|
|
|
|
|
Note: tdm implements PAM "session" support, which is not implemented in
|
|
|
|
|
certain PAM-aware xdm's that it may be replacing (e.g., the Red Hat
|
|
|
|
|
Linux 5.x xdm did not implement it). This may be configured to carry out
|
|
|
|
|
actions when a user opens or closes an tdm session, if a suitable PAM
|
|
|
|
|
module is available (e.g., mount and unmount user-specific filesystems).
|
|
|
|
|
|
|
|
|
|
Note 2: Screensavers typically only authenticate a user to allow her to
|
|
|
|
|
continue working. They may also renew tokens etc., where supported.
|
|
|
|
|
See the Linux PAM Administrators guide, which is part of the PAM
|
|
|
|
|
distribution, for more details.
|
|
|
|
|
|
|
|
|
|
|
