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
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
This module should be included as early as possible in a PAM
configuration, so that other PAM modules can attach tokens to the
The keyutils package is used to manipulate keys more directly. This
can be obtained from:
Log debug information with syslog(3).
Causes the session keyring of the invoking process to be replaced
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.
This module will usually return this value
Memory buffer error.
The return value should be ignored by PAM dispatch.
Cannot determine the user name.
This module will return this value if its arguments are invalid
or if a system error such as ENOMEM occurs.
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.
This page is part of the linux-pam (Pluggable Authentication Modules
for Linux) project. Information about the project can be found at
⟨https://fedorahosted.org/linux-pam/⟩. If you have a bug report for
this manual page, see ⟨https://fedorahosted.org/linux-pam/report⟩.
This page was obtained from the tarball Linux-PAM-1.3.0.tar.gz
fetched from ⟨http://www.linux-pam.org/library/⟩ on 2017-03-13. If
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Linux-PAM Manual 04/01/2016 PAM_KEYINIT(8)