1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* lib/krb5/krb/sname_match.c - krb5_sname_match API function */
3 /*
4 * Copyright (C) 2011 by the Massachusetts Institute of Technology.
5 * All rights reserved.
6 *
7 * Export of this software from the United States of America may
8 * require a specific license from the United States Government.
9 * It is the responsibility of any person or organization contemplating
10 * export to obtain such a license before exporting.
11 *
12 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
13 * distribute this software and its documentation for any purpose and
14 * without fee is hereby granted, provided that the above copyright
15 * notice appear in all copies and that both that copyright notice and
16 * this permission notice appear in supporting documentation, and that
17 * the name of M.I.T. not be used in advertising or publicity pertaining
18 * to distribution of the software without specific, written prior
19 * permission. Furthermore if you modify this software you must label
20 * your software as modified software and not distribute it in such a
21 * fashion that it might be confused with the original M.I.T. software.
22 * M.I.T. makes no representations about the suitability of
23 * this software for any purpose. It is provided "as is" without express
24 * or implied warranty.
25 */
26
27 #include "k5-int.h"
28 #include "int-proto.h"
29
30 krb5_boolean KRB5_CALLCONV
krb5_sname_match(krb5_context context,krb5_const_principal matching,krb5_const_principal princ)31 krb5_sname_match(krb5_context context, krb5_const_principal matching,
32 krb5_const_principal princ)
33 {
34 if (matching == NULL)
35 return TRUE;
36
37 if (matching->type != KRB5_NT_SRV_HST || matching->length != 2)
38 return krb5_principal_compare(context, matching, princ);
39
40 if (princ->length != 2)
41 return FALSE;
42
43 /* Check the realm if present in matching. */
44 if (matching->realm.length != 0 && !data_eq(matching->realm, princ->realm))
45 return FALSE;
46
47 /* Check the service name (must be present in matching). */
48 if (!data_eq(matching->data[0], princ->data[0]))
49 return FALSE;
50
51 /* Check the hostname if present in matching and not ignored. */
52 if (matching->data[1].length != 0 && !context->ignore_acceptor_hostname &&
53 !data_eq(matching->data[1], princ->data[1]))
54 return FALSE;
55
56 /* All elements match. */
57 return TRUE;
58 }
59
60 krb5_boolean
k5_sname_wildcard_host(krb5_context context,krb5_const_principal mprinc)61 k5_sname_wildcard_host(krb5_context context, krb5_const_principal mprinc)
62 {
63 if (mprinc == NULL)
64 return TRUE;
65
66 if (mprinc->type != KRB5_NT_SRV_HST || mprinc->length != 2)
67 return FALSE;
68
69 return context->ignore_acceptor_hostname || mprinc->data[1].length == 0;
70 }
71