CHKEY(1) User Commands CHKEY(1)


chkey - change user's secure RPC key pair


chkey [-p] [-s nis | files | ldap]
[-m <mechanism>]


chkey is used to change a user's secure RPC public key and secret key
pair. chkey prompts for the old secure-rpc password and verifies that it
is correct by decrypting the secret key. If the user has not already used
keylogin(1) to decrypt and store the secret key with keyserv(8), chkey
registers the secret key with the local keyserv(8) daemon. If the
secure-rpc password does not match the login password, chkey prompts for
the login password. chkey uses the login password to encrypt the user's
secret Diffie-Hellman (192 bit) cryptographic key.

chkey ensures that the login password and the secure-rpc password(s) are
kept the same, thus enabling password shadowing. See shadow(5).

The key pair can be stored in the /etc/publickey file (see publickey(5))
or the NIS publickey map. If a new secret key is generated, it will be
registered with the local keyserv(8) daemon.

Keys for specific mechanisms can be changed or reencrypted using the -m
option followed by the authentication mechanism name. Multiple -m
options can be used to change one or more keys.

If the source of the publickey is not specified with the -s option,
chkey consults the publickey entry in the name service switch
configuration file. See nsswitch.conf(5). If the publickey entry
specifies one and only one source, then chkey will change the key in the
specified name service. However, if multiple name services are listed,
chkey can not decide which source to update and will display an error
message. The user should specify the source explicitly with the -s

Non root users are not allowed to change their key pair in the files


The following options are supported:

Re-encrypt the existing secret key with the user's
login password.

-s nis
Update the NIS database.

-s files
Update the files database.

-s ldap
Update the LDAP database.

-m <mechanism>
Changes or re-encrypt the secret key for the specified





keylogin(1), keylogout(1), nsswitch.conf(5), publickey(5), shadow(5),
attributes(7), keyserv(8), newkey(8)

February 25, 2017 CHKEY(1)