xref: /titanic_41/usr/src/lib/gss_mechs/mech_krb5/krb5/krb/valid_times.c (revision 6a634c9dca3093f3922e4b7ab826d7bdf17bf78e)
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, &currenttime)))
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