1 /*
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 * krb5_validate_times()
28 */
29
30 #include "k5-int.h"
31
32
33 /*
34 * This is an internal routine which validates the krb5_timestamps
35 * field in a krb5_ticket.
36 */
37
38 krb5_error_code
krb5_validate_times(krb5_context context,krb5_ticket_times * times)39 krb5_validate_times(krb5_context context, krb5_ticket_times *times)
40 {
41 krb5_timestamp currenttime, starttime;
42 krb5_error_code retval;
43
44 if ((retval = krb5_timeofday(context, ¤ttime)))
45 return retval;
46
47 /* if starttime is not in ticket, then treat it as authtime */
48 if (times->starttime != 0)
49 starttime = times->starttime;
50 else
51 starttime = times->authtime;
52
53 if (starttime - currenttime > context->clockskew)
54 return KRB5KRB_AP_ERR_TKT_NYV; /* ticket not yet valid */
55
56 if ((currenttime - times->endtime) > context->clockskew)
57 return KRB5KRB_AP_ERR_TKT_EXPIRED; /* ticket expired */
58
59 return 0;
60 }
61
62
63
64