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/* $OpenBSD: get_krbrlm.c,v 1.12 1997/12/22 15:02:06 art Exp $ */
/* $KTH: get_krbrlm.c,v 1.16 1997/05/02 01:26:22 assar Exp $ */
/*
* This software may now be redistributed outside the US.
*
*/
/*
* 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;
}
int
krb_get_lrealm(char *r, int n)
{
int i;
char file[MAXPATHLEN];
if (n > 1)
return(KFAILURE); /* Temporary restriction */
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);
/* If nothing else works try LOCALDOMAIN, if it exists */
if (n == 1) {
char *t, hostname[MAXHOSTNAMELEN];
gethostname(hostname, sizeof(hostname));
t = krb_realmofhost(hostname);
if (t != NULL) {
strcpy (r, t);
return KSUCCESS;
}
t = strchr(hostname, '.');
if (t == 0)
return KFAILURE; /* No domain part, you loose */
t++; /* Skip leading dot and upcase the rest */
for (; *t != '\0'; t++, r++)
*r = toupper(*t);
*r = 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 (krb_get_lrealm(local_realm, 1) != KSUCCESS){
strncpy(local_realm, "NO.DEFAULT.REALM", REALM_SZ);
local_realm[REALM_SZ-1] = '\0';
}
return local_realm;
}
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