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keyutils(7)


NAME

   keyutils - In-kernel key management utilities

DESCRIPTION

   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.

UTILITIES

   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.

SEE ALSO

   keyrings(7),
   pam_keyinit(8),
   process-keyring(7),
   session-keyring(7),
   thread-keyring(7),
   user-keyring(7),
   user-session-keyring(7),
   persistent-keyring(7)



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