Provided by: keyutils_1.5.9-8ubuntu1_amd64
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() Supply a new key to the kernel. request_key() Find an existing key for use, or, optionally, create one if one does not exist. keyctl() 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 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.
keyrings(7), pam_keyinit(8), process-keyring(7), session-keyring(7), thread-keyring(7), user-keyring(7), user-session-keyring(7), persistent-keyring(7)