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KEYFILE(5)		      AFS File Reference		    KEYFILE(5)

       KeyFile - Defines AFS server encryption keys

       The KeyFile file	defines	the server encryption keys that	the AFS	server
       processes running on the	machine	use to decrypt the tickets presented
       by clients during the mutual authentication process. AFS	server
       processes perform privileged actions only for clients that possess a
       ticket encrypted	with one of the	keys from the file. The	file must
       reside in the /usr/local/etc/openafs/server directory on	every server
       machine.	For more detailed information on mutual	authentication and
       server encryption keys, see the OpenAFS Administration Guide.

       Each key	has a corresponding a key version number that distinguishes it
       from the	other keys. The	tickets	that clients present are also marked
       with a key version number to tell the server process which key to use
       to decrypt it. The KeyFile file must always include a key with the same
       key version number and contents as the key currently listed for the
       "afs/cell" principal in the associated Kerberos v5 realm	or
       Authentication Database.	(The principal "afs" may be used if the	cell
       and realm names are the same, but adding	the cell name to the principal
       is recommended even in this case. "afs" must be used as the principal
       name if the cell	uses the Authentication	Server rather than a Kerberos
       v5 realm.) The key must be a DES	key; no	stronger encryption type is

       The KeyFile file	is in binary format, so	always use either the asetkey
       command or the appropriate commands from	the bos	command	suite to
       administer it:

       o   The asetkey add or bos addkey command to add	a new key.

       o   The asetkey list or bos listkeys command to display the keys.

       o   The asetkey delete or bos removekey command to remove a key from
	   the file.

       The asetkey commands must be run	on the same server as the KeyFile file
       to update. The bos commands may be run remotely.	Normally, new keys
       should be added from a Kerberos v5 keytab using asetkey add.  bos
       addkey is normally only used if the Authentication Server is in use
       instead of a Kerberos v5	realm.

       In cells	that use the Update Server to distribute the contents of the
       /usr/local/etc/openafs/server directory,	it is customary	to edit	only
       the copy	of the file stored on the system control machine. Otherwise,
       edit the	file on	each server machine individually.

       The most	common error caused by changes to KeyFile is to	add a key that
       does not	match the corresponding	key for	the Kerberos v5	principal or
       Authentication Server database entry. Both the key and the key version
       number must match the key for the corresponding principal, either
       "afs/cell" or "afs", in the Kerberos v5 realm or	Authentication
       Database. For a Kerberos	v5 realm, that principal must only have	DES
       encryption types	in the Kerberos	KDC.

       In the unusual case of using bos	addkey to add a	key with a known
       password	matching a password used to generate Kerberos v5 keys, the
       keys in the Kerberos v5 KDC database must use "afs3" salt, not the
       default Kerberos	v5 salt. The salt doesn't matter for the more normal
       procedure of extracting a keytab	and then adding	the key	using asetkey.

       asetkey(8), bos_addkey(8), bos_listkeys(8), bos_removekey(8),
       kas_setpassword(8), upclient(8),	upserver(8)

       The OpenAFS Administration Guide	at

       IBM Corporation 2000. <> 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				  2016-12-14			    KEYFILE(5)


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