ktdefname.c revision 781:57319a72b15f 
1/*
2 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
3 * Use is subject to license terms.
4 */
5
6#pragma ident	"%Z%%M%	%I%	%E% SMI"
7
8/*
9 * lib/krb5/os/ktdefname.c
10 *
11 * Copyright 1990 by the Massachusetts Institute of Technology.
12 * All Rights Reserved.
13 *
14 * Export of this software from the United States of America may
15 *   require a specific license from the United States Government.
16 *   It is the responsibility of any person or organization contemplating
17 *   export to obtain such a license before exporting.
18 *
19 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
20 * distribute this software and its documentation for any purpose and
21 * without fee is hereby granted, provided that the above copyright
22 * notice appear in all copies and that both that copyright notice and
23 * this permission notice appear in supporting documentation, and that
24 * the name of M.I.T. not be used in advertising or publicity pertaining
25 * to distribution of the software without specific, written prior
26 * permission.  Furthermore if you modify this software you must label
27 * your software as modified software and not distribute it in such a
28 * fashion that it might be confused with the original M.I.T. software.
29 * M.I.T. makes no representations about the suitability of
30 * this software for any purpose.  It is provided "as is" without express
31 * or implied warranty.
32 *
33 *
34 * Return default keytab file name.
35 */
36
37#define NEED_WINDOWS
38
39#include <k5-int.h>
40
41extern char *krb5_defkeyname;
42
43/* this is a an exceedinly gross thing. */
44char *krb5_overridekeyname = NULL;
45
46krb5_error_code KRB5_CALLCONV
47krb5_kt_default_name(krb5_context context, char *name, int namesize)
48{
49    char *cp = 0;
50    char *retval;
51
52    if (krb5_overridekeyname) {
53	if ((size_t) namesize < (strlen(krb5_overridekeyname)+1))
54	    return KRB5_CONFIG_NOTENUFSPACE;
55	strncpy(name, krb5_overridekeyname, namesize);
56    } else if ((context->profile_secure == FALSE) &&
57	(cp = getenv("KRB5_KTNAME"))) {
58	if ((size_t) namesize < (strlen(cp)+1))
59	    return KRB5_CONFIG_NOTENUFSPACE;
60	strncpy(name, cp, namesize);
61    } else if ((profile_get_string(context->profile,
62					   "libdefaults",
63					   "default_keytab_name", NULL,
64					   NULL, &retval) == 0) &&
65	       retval) {
66	if ((size_t) namesize < (strlen(retval)+1))
67	    return KRB5_CONFIG_NOTENUFSPACE;
68	strncpy(name, retval, namesize);
69	profile_release_string(retval);
70    } else {
71#if defined(_WIN32)
72	{
73	    char    defname[160];
74	    int     len;
75
76	    len= GetWindowsDirectory( defname, sizeof(defname)-2 );
77	    defname[len]= '\0';
78	    if ( (len + strlen(krb5_defkeyname) + 1) > namesize )
79		return KRB5_CONFIG_NOTENUFSPACE;
80	    sprintf(name, krb5_defkeyname, defname);
81	}
82#else
83	if ((size_t) namesize < (strlen(krb5_defkeyname)+1))
84	    return KRB5_CONFIG_NOTENUFSPACE;
85	strncpy(name, krb5_defkeyname, namesize);
86#endif
87    }
88    return 0;
89}
90