oysteikt/heimdal
0
0
Fork 0
Code Issues 5 Pull Requests Releases Activity

handle more than one realm for a host

Browse Source 
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@5931 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Assar Westerlund
1999-04-11 00:42:49 +00:00
parent 8754a5f56f
commit d37b4252e0
1 changed files with 74 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files

110
lib/krb5/get_host_realm.c
View File

@@ -42,24 +42,62 @@
RCSID("$Id$");
/* To automagically find the correct realm of a host (without
* krb.realms) add a text record for your domain with the name of your
* realm, like this:
* [domain_realm] in krb5.conf) add a text record for your domain with
* the name of your realm, like this:
*
* krb5-realm IN TXT FOO.SE
*
* The search is recursive, so you can add entries for specific
* hosts. To find the realm of host a.b.c, it first tries
* krb5-realm.a.b.c, then krb5-realm.b.c and so on.
*/
* krb5-realm.a.b.c, then krb5-realm.b.c and so on. */
static int
copy_txt_to_realms (struct resource_record *head,
krb5_realm **realms)
{
struct resource_record *rr;
int n, i;
for(n = 0, rr = head; rr; rr = rr->next)
if (rr->type == T_TXT)
++n;
if (n == 0)
return -1;
*realms = malloc ((n + 1) * sizeof(krb5_realm));
if (*realms == NULL)
return -1;
for (i = 0; i < n + 1; ++i)
(*realms)[i] = NULL;
for (i = 0, rr = head; rr; rr = rr->next) {
if (rr->type == T_TXT) {
char *tmp;
tmp = strdup(rr->u.txt);
if (tmp == NULL) {
for (i = 0; i < n; ++i)
free ((*realms)[i]);
free (*realms);
return -1;
}
(*realms)[i] = tmp;
++i;
}
}
return 0;
}
static int
dns_find_realm(krb5_context context,
const char *domain,
krb5_realm *realm)
krb5_realm **realms)
{
char dom[MAXHOSTNAMELEN];
struct dns_reply *r;
struct resource_record *rr;
int ret;
if(*domain == '.')
domain++;
@@ -67,37 +105,36 @@ dns_find_realm(krb5_context context,
r = dns_lookup(dom, "TXT");
if(r == NULL)
return -1;
for(rr = r->head; rr; rr = rr->next) {
if(rr->type != T_TXT)
continue;
*realm = strdup(rr->u.txt);
dns_free_data(r);
if(*realm == NULL)
return ENOMEM;
return 0;
}
/* this shouldn't happen */
ret = copy_txt_to_realms (r->head, realms);
dns_free_data(r);
return -1;
return ret;
}
/*
* Try to figure out what realms host in `domain' belong to from the
* configuration file.
*/
static int
config_find_realm(krb5_context context,
const char *domain,
krb5_realm *realm)
krb5_realm **realms)
{
const char *s = krb5_config_get_string(context, NULL,
"domain_realm",
domain,
NULL);
if(s == NULL)
char **tmp = krb5_config_get_strings (context, NULL,
"domain_realm",
domain,
NULL);
if (tmp == NULL)
return -1;
*realm = strdup(s);
if(*realm == NULL)
return ENOMEM;
*realms = tmp;
return 0;
}
/*
* Return the realm(s) of `host' as a NULL-terminated list in `realms'. */
krb5_error_code
krb5_get_host_realm(krb5_context context,
const char *host,
@@ -126,17 +163,11 @@ krb5_get_host_realm(krb5_context context,
if (hostent != NULL)
host = hostent->h_name;
*realms = malloc(2 * sizeof(krb5_realm));
if (*realms == NULL)
return ENOMEM;
(*realms)[0] = NULL;
(*realms)[1] = NULL;
p = host;
while(p) {
if(config_find_realm(context, p, *realms) == 0)
if(config_find_realm(context, p, realms) == 0)
return 0;
else if(dns_find_realm(context, p, *realms) == 0)
else if(dns_find_realm(context, p, realms) == 0)
return 0;
p = strchr(p + 1, '.');
}
@@ -145,10 +176,17 @@ krb5_get_host_realm(krb5_context context,
p = strchr(orig_host, '.');
if(p) {
p++;
(*realms)[0] = strdup(p);
if((*realms)[0] == NULL)
*realms = malloc(2 * sizeof(krb5_realm));
if (*realms == NULL)
return ENOMEM;
(*realms)[0] = strdup(p);
if((*realms)[0] == NULL) {
free(*realms);
return ENOMEM;
}
strupr((*realms)[0]);
(*realms)[1] = NULL;
return 0;
}
free(*realms);