1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* lib/krb5/krb/valid_times.c */
3 /*
4 * Copyright 1995 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 /*
31 * This is an internal routine which validates the krb5_timestamps
32 * field in a krb5_ticket.
33 */
34
35 krb5_error_code
krb5int_validate_times(krb5_context context,krb5_ticket_times * times)36 krb5int_validate_times(krb5_context context, krb5_ticket_times *times)
37 {
38 krb5_timestamp currenttime, starttime;
39 krb5_error_code retval;
40
41 if ((retval = krb5_timeofday(context, ¤ttime)))
42 return retval;
43
44 /* if starttime is not in ticket, then treat it as authtime */
45 if (times->starttime != 0)
46 starttime = times->starttime;
47 else
48 starttime = times->authtime;
49
50 if (ts_after(starttime, ts_incr(currenttime, context->clockskew)))
51 return KRB5KRB_AP_ERR_TKT_NYV; /* ticket not yet valid */
52
53 if (ts_after(currenttime, ts_incr(times->endtime, context->clockskew)))
54 return KRB5KRB_AP_ERR_TKT_EXPIRED; /* ticket expired */
55
56 return 0;
57 }
58