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.Dd September 18, 2006
.Dt KIMPERSONATE 8
.Os
.Sh NAME
.Nm kimpersonate
.Nd impersonate a user when there exist a keyfile or KeyFile
.Sh SYNOPSIS
.Nm
.Op Fl s Ar string \*(Ba Fl Fl ccache= Ns Ar string
.Op Fl s Ar string \*(Ba Fl Fl server= Ns Ar string
.Op Fl c Ar string \*(Ba Fl Fl client= Ns Ar string
.Op Fl k Ar string \*(Ba Fl Fl keytab= Ns Ar string
.Op Fl 5 | Fl Fl krb5
.Op Fl A | Fl Fl add
.Op Fl R | Fl Fl referral
.Op Fl e Ar integer \*(Ba Fl Fl expire-time= Ns Ar integer
.Op Fl a Ar string \*(Ba Fl Fl client-address= Ns Ar string
.Op Fl t Ar string \*(Ba Fl Fl enc-type= Ns Ar string
.Op Fl Fl session-enc-type= Ns Ar string
.Op Fl f Ar string \*(Ba Fl Fl ticket-flags= Ns Ar string
.Op Fl Fl verbose
.Op Fl Fl version
.Op Fl Fl help
.Sh DESCRIPTION
The
.Nm
program creates a "fake" ticket using the service-key of the service and
stores it in the given (or default) ccache.  This is useful for testing.
The service key can be read from a Kerberos 5 keytab or AFS KeyFile.
Supported options:
.Bl -tag -width Ds
.It Fl Fl ccache= Ns Ar string
ccache into which to store the ticket
.It Fl s Ar string Ns , Fl Fl server= Ns Ar string
name of server principal
.It Fl c Ar string Ns , Fl Fl client= Ns Ar string
name of client principal
.It Fl k Ar string Ns , Fl Fl keytab= Ns Ar string
name of keytab file
.It Fl 5 Ns , Fl Fl krb5
create a Kerberos 5 ticket
.It Fl A Ns , Fl Fl add
don't re-initialize the ccache, instead add the ticket to an existing
ccache.
.It Fl R Ns , Fl Fl referral
simulate a referrals-based KDC client by storing two entries, one with
the empty realm for the service principal name.
.It Fl e Ar integer Ns , Fl Fl expire-time= Ns Ar integer
lifetime of ticket in seconds
.It Fl a Ar string Ns , Fl Fl client-address= Ns Ar string
address of client
.It Fl t Ar string Ns , Fl Fl enc-type= Ns Ar string
encryption type (defaults to "aes256-cts-hmac-sha1-96")
.It Fl Fl session-enc-type= Ns Ar string
session encryption type (defaults to enc-type or "des-cbc-crc" for afs service tickets)
.It Fl f Ar string Ns , Fl Fl ticket-flags= Ns Ar string
ticket flags for krb5 ticket
.It Fl Fl verbose
Verbose output
.It Fl Fl version
Print version
.It Fl Fl help
.El
.Sh FILES
Uses
.Pa /etc/krb5.keytab,
and
.Pa /usr/afs/etc/KeyFile
when available and the
.Fl k
option is used with an appropriate prefix.
.Sh EXAMPLES
.Nm
can be used in
.Nm samba
root preexec option
or for debugging.
.Nm
-s host/hummel.e.kth.se@E.KTH.SE -c lha@E.KTH.SE -5
will create a Kerberos 5 ticket for lha@E.KTH.SE for the host
hummel.e.kth.se if there exists a keytab entry for it in
.Pa /etc/krb5.keytab .
.Pp
In combination with the
.Nm ktutil
command, this is useful for testing.  For example, 
.Pp
.Nm ktutil
-k tkt add -p host/foo.test@TEST -V2 -e aes256-cts-hmac-sha1-96 -r
.Pp
.Nm
--cache=tcc -s host/foo.test@TEST -c jdoe@TEST -k tkt --referral
.Sh SEE ALSO
.Xr kinit 1 ,
.Xr klist 1
.Sh AUTHORS
Love Hornquist Astrand <lha@kth.se>