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pam_keyinit — Kernel session keyring initialiser module
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DESCRIPTION
The pam_keyinit PAM module ensures that the invoking process has a session
keyring other than the user default session keyring.
The session component of the module checks to see if the process's session
keyring is the user default, and, if it is, creates a new anonymous session
keyring with which to replace it.
If a new session keyring is created, it will install a link to the user common
keyring in the session keyring so that keys common to the user will be
automatically accessible through it.
The session keyring of the invoking process will thenceforth be inherited by
all its children unless they override it.
This module is intended primarily for use by login processes. Be aware that
after the session keyring has been replaced, the old session keyring and the
keys it contains will no longer be accessible.
This module should not, generally, be invoked by programs like su, since it is
usually desirable for the key set to percolate through to the alternate
context. The keys have their own permissions system to manage this.
This module should be included as early as possible in a PAM configuration, so
that other PAM modules can attach tokens to the keyring.
The keyutils package is used to manipulate keys more directly. This can be
obtained from:
Keyutils
OPTIONS
debug
Log debug information with syslog(3).
force
Causes the session keyring of the invoking process to be replaced
unconditionally.
revoke
Causes the session keyring of the invoking process to be revoked when the
invoking process exits if the session keyring was created for this process
in the first place.
EXAMPLES
Add this line to your login entries to start each login session with its own
session keyring:
session required pam_keyinit.so
This will prevent keys from one session leaking into another session for the
same user.
AUTHOR
pam_keyinit was written by David Howells, <dhowells@redhat.com>.