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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | MODULE TYPES PROVIDED | RETURN VALUES | EXAMPLES | SEE ALSO | AUTHOR | NOTES | COLOPHON |
PAM_KEYINIT(8) Linux-PAM Manual PAM_KEYINIT(8)
pam_keyinit - Kernel session keyring initialiser module
pam_keyinit.so [debug] [force] [revoke]
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[1]
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.
Only the session module type is provided.
PAM_SUCCESS
This module will usually return this value
PAM_AUTH_ERR
Authentication failure.
PAM_BUF_ERR
Memory buffer error.
PAM_IGNORE
The return value should be ignored by PAM dispatch.
PAM_SERVICE_ERR
Cannot determine the user name.
PAM_SESSION_ERR
This module will return this value if its arguments are invalid
or if a system error such as ENOMEM occurs.
PAM_USER_UNKNOWN
User not known.
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.
pam.conf(5), pam.d(5), pam(8)keyctl(1)
pam_keyinit was written by David Howells, <dhowells@redhat.com>.
1. Keyutils
http://people.redhat.com/~dhowells/keyutils/
This page is part of the linux-pam (Pluggable Authentication Modules
for Linux) project. Information about the project can be found at
⟨http://www.linux-pam.org/⟩. If you have a bug report for this manual
page, see ⟨//www.linux-pam.org/⟩. This page was obtained from the
tarball Linux-PAM-1.3.0.tar.gz fetched from
⟨http://www.linux-pam.org/library/⟩ on 2017-07-05. If you discover
any rendering problems in this HTML version of the page, or you
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you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
Linux-PAM Manual 04/01/2016 PAM_KEYINIT(8)
Pages that refer to this page: keyrings(7), keyutils(7), session-keyring(7), user-keyring(7), user-session-keyring(7)