Provided by: openafs-kpasswd_1.6.15-1ubuntu1_amd64 bug

NAME

       kas_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 /etc/openafs/server/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 ALSO

       bos_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.