KEYUTILS(7) Kernel key management KEYUTILS(7)
keyutils - in-kernel key management utilities
The keyutils package is a library and a set of utilities for accessing the kernel keyrings facility. A header file is supplied to provide the definitions and declarations required to access the library: #include <keyutils.h> To link with the library, the following: -lkeyutils should be specified to the linker. Three system calls are provided: add_key(2) Supply a new key to the kernel. request_key(2) Find an existing key for use, or, optionally, create one if one does not exist. keyctl(2) Control a key in various ways. The library provides a variety of wrappers around this system call and those should be used rather than calling it directly. See the add_key(2), request_key(2), and keyctl(2) manual pages for more information. The keyctl() wrappers are listed on the keyctl(3) manual page.
A program is provided to interact with the kernel facility by a number of subcommands, e.g.: keyctl add user foo bar @s See the keyctl(1) manual page for information on that. The kernel has the ability to upcall to userspace to fabricate new keys. This can be triggered by request_key(), but userspace is better off using add_key() instead if it possibly can. The upcalling mechanism is usually routed via the request-key(8) program. What this does with any particular key is configurable in: /etc/request-key.conf /etc/request-key.d/ See the request-key.conf(5) and the request-key(8) manual pages for more information.
keyctl(1), keyctl(3), keyrings(7), persistent-keyring(7), process-keyring(7), session-keyring(7), thread-keyring(7), user-keyring(7), user-session-keyring(7), pam_keyinit(8)
This page is part of the keyutils (key management utilities) project. Information about the project can be found at [unknown -- if you know, please contact firstname.lastname@example.org] If you have a bug report for this manual page, send it to email@example.com. This page was obtained from the project's upstream Git repository ⟨http://git.kernel.org/pub/scm/linux/kernel/git/dhowells/keyutils.git⟩ on 2021-08-27. (At that time, the date of the most recent commit that was found in the repository was 2020-07-07.) 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 firstname.lastname@example.org Linux 21 Feb 2014 KEYUTILS(7)
Pages that refer to this page: add_key(2), keyctl(2), request_key(2), keyctl(3), keyctl_capabilities(3), keyctl_chown(3), keyctl_clear(3), keyctl_describe(3), keyctl_dh_compute(3), keyctl_get_keyring_ID(3), keyctl_get_persistent(3), keyctl_get_security(3), keyctl_instantiate(3), keyctl_invalidate(3), keyctl_join_session_keyring(3), keyctl_link(3), keyctl_move(3), keyctl_pkey_encrypt(3), keyctl_pkey_query(3), keyctl_pkey_sign(3), keyctl_read(3), keyctl_restrict_keyring(3), keyctl_revoke(3), keyctl_search(3), keyctl_session_to_parent(3), keyctl_setperm(3), keyctl_set_reqkey_keyring(3), keyctl_set_timeout(3), keyctl_update(3), keyctl_watch_key(3), asymmetric-key(7), keyrings(7)