162 lines
4.0 KiB
Groff
162 lines
4.0 KiB
Groff
|
.\" from: krb_realmofhost.3,v 4.1 89/01/23 11:10:47 jtkohl Exp $
|
||
|
|
.\" $Id: krb_realmofhost.3,v 1.2 1994/07/19 19:27:46 g89r4222 Exp $
|
||
|
|
.\" Copyright 1989 by the Massachusetts Institute of Technology.
|
||
|
|
.\"
|
||
|
|
.\" For copying and distribution information,
|
||
|
|
.\" please see the file <Copyright.MIT>.
|
||
|
|
.\"
|
||
|
|
.TH KRB_REALMOFHOST 3 "Kerberos Version 4.0" "MIT Project Athena"
|
||
|
|
.SH NAME
|
||
|
|
krb_realmofhost, krb_get_phost, krb_get_krbhst, krb_get_admhst,
|
||
|
|
krb_get_lrealm \- additional Kerberos utility routines
|
||
|
|
.SH SYNOPSIS
|
||
|
|
.nf
|
||
|
|
.nj
|
||
|
|
.ft B
|
||
|
|
#include <krb.h>
|
||
|
|
#include <des.h>
|
||
|
|
#include <netinet/in.h>
|
||
|
|
.PP
|
||
|
|
.ft B
|
||
|
|
char *krb_realmofhost(host)
|
||
|
|
char *host;
|
||
|
|
.PP
|
||
|
|
.ft B
|
||
|
|
char *krb_get_phost(alias)
|
||
|
|
char *alias;
|
||
|
|
.PP
|
||
|
|
.ft B
|
||
|
|
krb_get_krbhst(host,realm,n)
|
||
|
|
char *host;
|
||
|
|
char *realm;
|
||
|
|
int n;
|
||
|
|
.PP
|
||
|
|
.ft B
|
||
|
|
krb_get_admhst(host,realm,n)
|
||
|
|
char *host;
|
||
|
|
char *realm;
|
||
|
|
int n;
|
||
|
|
.PP
|
||
|
|
.ft B
|
||
|
|
krb_get_lrealm(realm,n)
|
||
|
|
char *realm;
|
||
|
|
int n;
|
||
|
|
.fi
|
||
|
|
.ft R
|
||
|
|
.SH DESCRIPTION
|
||
|
|
.I krb_realmofhost
|
||
|
|
returns the Kerberos realm of the host
|
||
|
|
.IR host ,
|
||
|
|
as determined by the translation table
|
||
|
|
.IR /etc/krb.realms .
|
||
|
|
.I host
|
||
|
|
should be the fully-qualified domain-style primary host name of the host
|
||
|
|
in question. In order to prevent certain security attacks, this routine
|
||
|
|
must either have
|
||
|
|
.I a priori
|
||
|
|
knowledge of a host's realm, or obtain such information securely.
|
||
|
|
.PP
|
||
|
|
The format of the translation file is described by
|
||
|
|
.IR krb.realms (5).
|
||
|
|
If
|
||
|
|
.I host
|
||
|
|
exactly matches a host_name line, the corresponding realm
|
||
|
|
is returned.
|
||
|
|
Otherwise, if the domain portion of
|
||
|
|
.I host
|
||
|
|
matches a domain_name line, the corresponding realm
|
||
|
|
is returned.
|
||
|
|
If
|
||
|
|
.I host
|
||
|
|
contains a domain, but no translation is found,
|
||
|
|
.IR host 's
|
||
|
|
domain is converted to upper-case and returned.
|
||
|
|
If
|
||
|
|
.I host
|
||
|
|
contains no discernable domain, or an error occurs,
|
||
|
|
the local realm name, as supplied by
|
||
|
|
.IR krb_get_lrealm (3),
|
||
|
|
is returned.
|
||
|
|
.PP
|
||
|
|
.I krb_get_phost
|
||
|
|
converts the hostname
|
||
|
|
.I alias
|
||
|
|
(which can be either an official name or an alias) into the instance
|
||
|
|
name to be used in obtaining Kerberos tickets for most services,
|
||
|
|
including the Berkeley rcmd suite (rlogin, rcp, rsh).
|
||
|
|
.br
|
||
|
|
The current convention is to return the first segment of the official
|
||
|
|
domain-style name after conversion to lower case.
|
||
|
|
.PP
|
||
|
|
.I krb_get_krbhst
|
||
|
|
fills in
|
||
|
|
.I host
|
||
|
|
with the hostname of the
|
||
|
|
.IR n th
|
||
|
|
host running a Kerberos key distribution center (KDC)
|
||
|
|
for realm
|
||
|
|
.IR realm ,
|
||
|
|
as specified in the configuration file (\fI/etc/krb.conf\fR).
|
||
|
|
The configuration file is described by
|
||
|
|
.IR krb.conf (5).
|
||
|
|
If the host is successfully filled in, the routine
|
||
|
|
returns KSUCCESS.
|
||
|
|
If the file cannot be opened, and
|
||
|
|
.I n
|
||
|
|
equals 1, then the value of KRB_HOST as defined in
|
||
|
|
.I <krb.h>
|
||
|
|
is filled in, and KSUCCESS is returned. If there are fewer than
|
||
|
|
.I n
|
||
|
|
hosts running a Kerberos KDC for the requested realm, or the
|
||
|
|
configuration file is malformed, the routine
|
||
|
|
returns KFAILURE.
|
||
|
|
.PP
|
||
|
|
.I krb_get_admhst
|
||
|
|
fills in
|
||
|
|
.I host
|
||
|
|
with the hostname of the
|
||
|
|
.IR n th
|
||
|
|
host running a Kerberos KDC database administration server
|
||
|
|
for realm
|
||
|
|
.IR realm ,
|
||
|
|
as specified in the configuration file (\fI/etc/krb.conf\fR).
|
||
|
|
If the file cannot be opened or is malformed, or there are fewer than
|
||
|
|
.I n
|
||
|
|
hosts running a Kerberos KDC database administration server,
|
||
|
|
the routine returns KFAILURE.
|
||
|
|
.PP
|
||
|
|
The character arrays used as return values for
|
||
|
|
.IR krb_get_krbhst ,
|
||
|
|
.IR krb_get_admhst ,
|
||
|
|
should be large enough to
|
||
|
|
hold any hostname (MAXHOSTNAMELEN from <sys/param.h>).
|
||
|
|
.PP
|
||
|
|
.I krb_get_lrealm
|
||
|
|
fills in
|
||
|
|
.I realm
|
||
|
|
with the
|
||
|
|
.IR n th
|
||
|
|
realm of the local host, as specified in the configuration file.
|
||
|
|
.I realm
|
||
|
|
should be at least REALM_SZ (from
|
||
|
|
.IR <krb.h>) characters long.
|
||
|
|
.PP
|
||
|
|
.SH SEE ALSO
|
||
|
|
kerberos(3), krb.conf(5), krb.realms(5)
|
||
|
|
.SH FILES
|
||
|
|
.TP 20n
|
||
|
|
/etc/krb.realms
|
||
|
|
translation file for host-to-realm mapping.
|
||
|
|
.TP
|
||
|
|
/etc/krb.conf
|
||
|
|
local realm-name and realm/server configuration file.
|
||
|
|
.SH BUGS
|
||
|
|
The current convention for instance names is too limited; the full
|
||
|
|
domain name should be used.
|
||
|
|
.PP
|
||
|
|
.I krb_get_lrealm
|
||
|
|
currently only supports
|
||
|
|
.I n
|
||
|
|
= 1. It should really consult the user's ticket cache to determine the
|
||
|
|
user's current realm, rather than consulting a file on the host.
|