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
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, <firstname.lastname@example.org>.
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.bz2 fetched from ⟨http://www.linux-pam.org/library/⟩ on 2021-08-27. If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to email@example.com 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)