valid_times.c revision 159d09a20817016f09b3ea28d1bdada4a336bb91
/*
* lib/krb5/krb/valid_times.c
*
* Copyright 1995 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* krb5_validate_times()
*/
#include "k5-int.h"
#define in_clock_skew(date) (labs((date)-currenttime) < context->clockskew)
/*
* This is an internal routine which validates the krb5_timestamps
* field in a krb5_ticket.
*/
krb5_error_code
krb5_validate_times(krb5_context context, krb5_ticket_times *times)
{
krb5_timestamp currenttime, starttime;
krb5_error_code retval;
if ((retval = krb5_timeofday(context, &currenttime)))
return retval;
/* if starttime is not in ticket, then treat it as authtime */
if (times->starttime != 0)
starttime = times->starttime;
else
starttime = times->authtime;
if (starttime - currenttime > context->clockskew)
return KRB5KRB_AP_ERR_TKT_NYV; /* ticket not yet valid */
if ((currenttime - times->endtime) > context->clockskew)
return KRB5KRB_AP_ERR_TKT_EXPIRED; /* ticket expired */
return 0;
}