KAS_EXAMINE(8) AFS Command Reference KAS_EXAMINE(8)NAMEkas_examine - Displays information from an Authentication Database
entry
SYNOPSIS
kas examine -name <name of user> [-showkey]
[-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 e -na <name of user> [-sh]
[-a <admin principal to use for authentication>]
[-p <admin password>] [-c <cell name>]
[-se <explicit list of authentication servers>+] [-no] [-h]
DESCRIPTION
The kas examine command formats and displays information from the
Authentication Database entry of the user named by the -name argument.
To alter the settings displayed with this command, issue the kas
setfields command.
CAUTIONS
Displaying actual keys on the standard output stream by including the
-showkey flag constitutes a security exposure. For most purposes, it is
sufficient to display a checksum.
OPTIONS-name <name of user>
Names the Authentication Database entry from which to display
information.
-showkey
Displays the octal digits that constitute the key. The issuer must
have the "ADMIN" flag on his or her Authentication Database entry.
-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.
OUTPUT
The output includes:
· The entry name, following the string "User data for".
· One or more status flags in parentheses; they appear only if an
administrator has used the kas setfields command to change them
from their default values. A plus sign ("+") separates the flags if
there is more than one. The nondefault values that can appear, and
their meanings, are as follows:
ADMIN
Enables the user to issue privileged kas commands (default is
"NOADMIN").
NOTGS
Prevents the user from obtaining tickets from the
Authentication Server's Ticket Granting Service (default is
"TGS").
NOSEAL
Prevents the Ticket Granting Service from using the entry's key
field as an encryption key (default is "SEAL").
NOCPW
Prevents the user from changing his or her password (default is
"CPW").
· The key version number, in parentheses, following the word "key",
then one of the following.
· A checksum equivalent of the key, following the string "cksum
is", if the -showkey flag is not included. The checksum is a
decimal number derived by encrypting a constant with the key.
In the case of the "afs" entry, this number must match the
checksum with the corresponding key version number in the
output of the bos listkeys command; if not, follow the
instructions in the OpenAFS Administration Guide for creating a
new server encryption key.
· The actual key, following a colon, if the -showkey flag is
included. The key consists of eight octal numbers, each
represented as a backslash followed by three decimal digits.
· The date the user last changed his or her own password, following
the string "last cpw" (which stands for "last change of password").
· The string "password will never expire" indicates that the
associated password never expires; the string "password will
expire" is followed by the password's expiration date. After the
indicated date, the user cannot authenticate, but has 30 days after
it in which to use the kpasswd or kas setpassword command to set a
new password. After 30 days, only an administrator (one whose
account is marked with the "ADMIN" flag) can change the password by
using the kas setpassword command. To set the password expiration
date, use the kas setfields command's -pwexpires argument.
· The number of times the user can fail to provide the correct
password before the account locks, followed by the string
"consecutive unsuccessful authentications are permitted", or the
string "An unlimited number of unsuccessful authentications is
permitted" to indicate that there is no limit. To set the limit,
use the kas setfields command's -attempts argument. To unlock a
locked account, use the kas unlock command. The kas setfields
reference page discusses how the implementation of the lockout
feature interacts with this setting.
· The number of minutes for which the Authentication Server refuses
the user's login attempts after the limit on consecutive
unsuccessful authentication attempts is exceeded, following the
string "The lock time for this user is". Use the kas command's
-locktime argument to set the lockout time. This line appears only
if a limit on the number of unsuccessful authentication attempts
has been set with the kas setfields command's -attempts argument.
· An indication of whether the Authentication Server is currently
refusing the user's login attempts. The string "User is not locked"
indicates that authentication can succeed, whereas the string "User
is locked until" time indicates that the user cannot authenticate
until the indicated time. Use the kas unlock command to enable a
user to attempt authentication. This line appears only if a limit
on the number of unsuccessful authentication attempts has been set
with the kas setfields command's -attempts argument.
· The date on which the Authentication Server entry expires, or the
string "entry never expires" to indicate that the entry does not
expire. A user becomes unable to authenticate when his or her entry
expires. Use the kas setfields command's -expiration argument to
set the expiration date.
· The maximum possible lifetime of the tokens that the Authentication
Server grants the user. This value interacts with several others to
determine the actual lifetime of the token, as described in
klog(1). Use the kas setfields command's -lifetime argument to set
this value.
· The date on which the entry was last modified, following the string
"last mod on" and the user name of the administrator who modified
it. The date on which a user changed his or her own password is
recorded on the second line of output as "last cpw" instead.
· An indication of whether the user can reuse one of his or her last
twenty passwords when issuing the kpasswd, kas setpassword, or kas
setkey commands. Use the kas setfields command's -reuse argument to
set this restriction.
EXAMPLES
The following example command shows the user smith displaying her own
Authentication Database entry. Note the "ADMIN" flag, which shows that
"smith" is privileged.
% kas examine smith
Password for smith:
User data for smith (ADMIN)
key (0) cksum is 3414844392, last cpw: Thu Mar 25 16:05:44 1999
password will expire: Fri Apr 30 20:44:36 1999
5 consecutive unsuccessful authentications are permitted.
The lock time for this user is 25.5 minutes.
User is not locked.
entry never expires. Max ticket lifetime 100.00 hours.
last mod on Tue Jan 5 08:22:29 1999 by admin
permit password reuse
In the following example, the user "pat" examines his Authentication
Database entry to determine when the account lockout currently in
effect will end.
% kas examine pat
Password for pat:
User data for pat
key (0) cksum is 73829292912, last cpw: Wed Apr 7 11:23:01 1999
password will expire: Fri Jun 11 11:23:01 1999
5 consecutive unsuccessful authentications are permitted.
The lock time for this user is 25.5 minutes.
User is locked until Tue Sep 21 12:25:07 1999
entry expires on never. Max ticket lifetime 100.00 hours.
last mod on Thu Feb 4 08:22:29 1999 by admin
permit password reuse
In the following example, an administrator logged in as "admin" uses
the -showkey flag to display the octal digits that constitute the key
in the "afs" entry.
% kas examine -name afs -showkey
Password for admin: I<admin_password>
User data for afs
key (12): \357\253\304\352\234\236\253\352, last cpw: no date
entry never expires. Max ticket lifetime 100.00 hours.
last mod on Thu Mar 25 14:53:29 1999 by admin
permit password reuse
PRIVILEGE REQUIRED
A user can examine his or her own entry. To examine others' entries or
to include the -showkey flag, the issuer must have the "ADMIN" flag set
in his or her Authentication Database entry.
SEE ALSObos_addkey(8), bos_listkeys(8), bos_setauth(8), kas(8),
kas_setfields(8), kas_setpassword(8), kas_unlock(8), klog(1),
kpasswd(1)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_EXAMINE(8)
