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/* $OpenBSD: get_krbrlm.c,v 1.15 1998/05/18 00:53:41 art Exp $ */
/* $KTH: get_krbrlm.c,v 1.20 1998/03/18 13:46:51 bg Exp $ */
/*
* This source code is no longer held under any constraint of USA
* `cryptographic laws' since it was exported legally. The cryptographic
* functions were removed from the code and a "Bones" distribution was
* made. A Commodity Jurisdiction Request #012-94 was filed with the
* USA State Department, who handed it to the Commerce department. The
* code was determined to fall under General License GTDA under ECCN 5D96G,
* and hence exportable. The cryptographic interfaces were re-added by Eric
* Young, and then KTH proceeded to maintain the code in the free world.
*
*/
/*
* Copyright (C) 1989 by the Massachusetts Institute of Technology
*
* Export of this software from the United States of America is assumed
* to require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*/
#include "krb_locl.h"
/*
* krb_get_lrealm takes a pointer to a string, and a number, n. It fills
* in the string, r, with the name of the nth realm specified on the
* first line of the kerberos config file (KRB_CONF, defined in "krb.h").
* It returns 0 (KSUCCESS) on success, and KFAILURE on failure. If the
* config file does not exist, and if n=1, a successful return will occur
* with r = KRB_REALM (also defined in "krb.h").
*
* NOTE: for archaic & compatibility reasons, this routine will only return
* valid results when n = 1.
*
* For the format of the KRB_CONF file, see comments describing the routine
* krb_get_krbhst().
*/
static int
krb_get_lrealm_f(char *r, int n, const char *fname)
{
FILE *f;
int ret = KFAILURE;
f = fopen(fname, "r");
if(f){
char buf[REALM_SZ];
if(fgets(buf, sizeof(buf), f)){
char *p = buf + strspn(buf, " \t");
p[strcspn(p, " \t\r\n")] = 0;
p[REALM_SZ - 1] = 0;
strncpy(r, p, REALM_SZ);
r[REALM_SZ-1] = '\0';
if (*p != '#')
ret = KSUCCESS;
}
fclose(f);
}
return ret;
}
static const char *no_default_realm = "NO.DEFAULT.REALM";
int
krb_get_lrealm(char *r, int n)
{
int i;
char file[MAXPATHLEN];
if (n > 1)
return(KFAILURE); /* Temporary restriction */
r[0] = '#';
for (i = 0; krb_get_krbconf(i, file, sizeof(file)) == 0; i++)
if (krb_get_lrealm_f(r, n, file) == KSUCCESS)
return KSUCCESS;
if (r[0] == '#')
return(KFAILURE);
/* When nothing else works try default realm */
if (n == 1) {
char *t = krb_get_default_realm();
if (strcmp(t, no_default_realm) == 0)
return KFAILURE;
strncpy (r, t, REALM_SZ - 1);
r[REALM_SZ - 1] = '\0';
return KSUCCESS;
}
else
return(KFAILURE);
}
/* For SunOS5 compat. */
char *
krb_get_default_realm(void)
{
static char local_realm[REALM_SZ]; /* Local kerberos realm */
if (local_realm[0] == 0)
{
char *t, hostname[MAXHOSTNAMELEN];
strncpy(local_realm, no_default_realm, sizeof(local_realm) - 1);
local_realm[sizeof(local_realm) - 1] = '\0';
gethostname(hostname, sizeof(hostname));
t = krb_realmofhost(hostname);
if (t && strcmp(t, no_default_realm) != 0) {
strncpy(local_realm, t, sizeof(local_realm) - 1);
local_realm[sizeof(local_realm) - 1] = '\0';
}
}
return local_realm;
}
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