138 lines
4.2 KiB
C
138 lines
4.2 KiB
C
/*
|
|
* Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "krb_locl.h"
|
|
|
|
RCSID("$Id: get_krbrlm.c,v 1.25 1999/12/02 16:58:41 joda Exp $");
|
|
|
|
/*
|
|
* 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").
|
|
*
|
|
* 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)
|
|
{
|
|
char buf[1024];
|
|
char *p;
|
|
int nchar;
|
|
FILE *f;
|
|
int ret = KFAILURE;
|
|
|
|
if (n < 0)
|
|
return KFAILURE;
|
|
if(n == 0)
|
|
n = 1;
|
|
|
|
f = fopen(fname, "r");
|
|
if (f == 0)
|
|
return KFAILURE;
|
|
|
|
for (; n > 0; n--)
|
|
if (fgets(buf, sizeof(buf), f) == 0)
|
|
goto done;
|
|
|
|
/* We now have the n:th line, remove initial white space. */
|
|
p = buf + strspn(buf, " \t");
|
|
|
|
/* Collect realmname. */
|
|
nchar = strcspn(p, " \t\n");
|
|
if (nchar == 0 || nchar > REALM_SZ)
|
|
goto done; /* No realmname */
|
|
strncpy(r, p, nchar);
|
|
r[nchar] = 0;
|
|
|
|
/* Does more junk follow? */
|
|
p += nchar;
|
|
nchar = strspn(p, " \t\n");
|
|
if (p[nchar] == 0)
|
|
ret = KSUCCESS; /* This was a realm name only line. */
|
|
|
|
done:
|
|
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];
|
|
|
|
for (i = 0; krb_get_krbconf(i, file, sizeof(file)) == 0; i++)
|
|
if (krb_get_lrealm_f(r, n, file) == KSUCCESS)
|
|
return KSUCCESS;
|
|
|
|
/* 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; /* Can't figure out default realm */
|
|
|
|
strcpy(r, t);
|
|
return KSUCCESS;
|
|
}
|
|
else
|
|
return(KFAILURE);
|
|
}
|
|
|
|
/* Returns local realm if that can be figured out else NO.DEFAULT.REALM */
|
|
char *
|
|
krb_get_default_realm(void)
|
|
{
|
|
static char local_realm[REALM_SZ]; /* Local kerberos realm */
|
|
|
|
if (local_realm[0] == 0) {
|
|
char *t, hostname[MaxHostNameLen];
|
|
|
|
strlcpy(local_realm, no_default_realm,
|
|
sizeof(local_realm)); /* Provide default */
|
|
|
|
gethostname(hostname, sizeof(hostname));
|
|
t = krb_realmofhost(hostname);
|
|
if (t && strcmp(t, no_default_realm) != 0)
|
|
strlcpy(local_realm, t, sizeof(local_realm));
|
|
}
|
|
return local_realm;
|
|
}
|