KAS_SETPASSWORD(8) AFS Command Reference KAS_SETPASSWORD(8)NAMEkas_setpassword - Changes the key field in an Authentication Database
entry
SYNOPSIS
kas setpassword -name <name of user>
[-new_password <new password>] [-kvno <key version number>]
[-admin_username <admin principal to use for authentication>]
[-password_for_admin <admin password>] [-cell <cell name>]
[-servers <explicit list of authentication servers>+]
[-noauth] [-help]
kas setpasswd -na <name of user> [-ne <new password>]
[-k <key version number>]
[-a <admin principal to use for authentication>]
[-p <admin password>] [-c <cell name>]
[-s <explicit list of authentication servers>+] [-no] [-h]
kas setp -na <name of user> [-ne <new password>]
[-k <key version number>]
[-a <admin principal to use for authentication>]
[-p <admin password>] [-c <cell name>]
[-s <explicit list of authentication servers>+] [-no] [-h]
kas sp -na <name of user> [-ne <new password>]
[-k <key version number>]
[-a <admin principal to use for authentication>]
[-p <admin password>] [-c <cell name>]
[-s <explicit list of authentication servers>+] [-no] [-h]
DESCRIPTION
The kas setpassword command accepts a character string of unlimited
length, scrambles it into a form suitable for use as an encryption key,
places it in the key field of the Authentication Database entry named
by the -name argument, and assigns it the key version number specified
by the -kvno argument.
To avoid making the password string visible at the shell prompt, omit
the -new_password argument. Prompts then appear at the shell which do
not echo the password visibly.
When changing the afs server key, also issue bos addkey command to add
the key (with the same key version number) to the /usr/afs/etc/KeyFile
file. See the OpenAFS Administration Guide for instructions.
The command interpreter checks the password string subject to the
following conditions:
· If there is a program called kpwvalid in the same directory as the
kas binary, the command interpreter invokes it to process the
password. For details, see kpwvalid(8).
· If the -reuse argument to the kas setfields command has been used
to prohibit reuse of previous passwords, the command interpreter
verifies that the password is not too similar too any of the user's
previous 20 passwords. It generates the following error message at
the shell:
Password was not changed because it seems like a reused password
To prevent a user from subverting this restriction by changing the
password twenty times in quick succession (manually or by running a
script), use the -minhours argument on the kaserver initialization
command. The following error message appears if a user attempts to
change a password before the minimum time has passed:
Password was not changed because you changed it too
recently; see your systems administrator
OPTIONS-name <name of user>
Names the entry in which to record the new key.
-new_password <new password>
Specifies the character string the user types when authenticating
to AFS. Omit this argument and type the string at the resulting
prompts so that the password does not echo visibly. Note that some
non-AFS programs cannot handle passwords longer than eight
characters.
-kvno <key version number>
Specifies the key version number associated with the new key.
Provide an integer in the range from 0 through 255. If omitted, the
default is 0 (zero), which is probably not desirable for server
keys.
-admin_username <admin principal>
Specifies the user identity under which to authenticate with the
Authentication Server for execution of the command. For more
details, see kas(8).
-password_for_admin <admin password>
Specifies the password of the command's issuer. If it is omitted
(as recommended), the kas command interpreter prompts for it and
does not echo it visibly. For more details, see kas(8).
-cell <cell name>
Names the cell in which to run the command. For more details, see
kas(8).
-servers <authentication servers>+
Names each machine running an Authentication Server with which to
establish a connection. For more details, see kas(8).
-noauth
Assigns the unprivileged identity "anonymous" to the issuer. For
more details, see kas(8).
-help
Prints the online help for this command. All other valid options
are ignored.
EXAMPLES
In the following example, an administrator using the "admin" account
changes the password for "pat" (presumably because "pat" forgot the
former password or got locked out of his account in some other way).
% kas setpassword pat
Password for admin:
new_password:
Verifying, please re-enter new_password:
PRIVILEGE REQUIRED
Individual users can change their own passwords. To change another
user's password or the password (server encryption key) for server
entries such as "afs", the issuer must have the "ADMIN" flag set in his
or her Authentication Database entry.
SEE ALSObos_addkey(8), kas(8), kaserver(8), kpwvalid(8)COPYRIGHT
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
This documentation is covered by the IBM Public License Version 1.0.
It was converted from HTML to POD by software written by Chas Williams
and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.
OpenAFS 2013-10-09 KAS_SETPASSWORD(8)
