KEYUTILS - Online Linux Manual PageSection : 7
Updated : 21 Feb 2014
Source : Linux
Note : Kernel key management
NAMEkeyutils − in-kernel key management utilities
DESCRIPTIONThe 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.
UTILITIESA 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.
SEE ALSOkeyctl(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) 0
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