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 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