/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/krb5/os/timeofday.c */
/*
* Copyright 1990, 2007 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.
*/
#include "k5-int.h"
#include <time.h>
krb5_error_code KRB5_CALLCONV
krb5_timeofday(krb5_context context, krb5_timestamp *timeret)
{
krb5_os_context os_ctx;
time_t tval;
if (context == NULL)
return EINVAL;
os_ctx = &context->os_context;
if (os_ctx->os_flags & KRB5_OS_TOFFSET_TIME) {
*timeret = os_ctx->time_offset;
return 0;
}
tval = time(0);
if (tval == (time_t) -1)
return (krb5_error_code) errno;
if (os_ctx->os_flags & KRB5_OS_TOFFSET_VALID)
tval += os_ctx->time_offset;
*timeret = tval;
return 0;
}
krb5_error_code KRB5_CALLCONV
krb5_check_clockskew(krb5_context context, krb5_timestamp date)
{
krb5_timestamp currenttime;
krb5_error_code retval;
retval = krb5_timeofday(context, ¤ttime);
if (retval)
return retval;
if (!ts_within(date, currenttime, context->clockskew))
return KRB5KRB_AP_ERR_SKEW;
return 0;
}