1 /*
2 * lib/krb5/os/ustime.c
3 *
4 * Copyright 1990,1991 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 * krb5_crypto_us_timeofday() does all of the real work; however, we
27 * handle the time offset adjustment here, since this is context
28 * specific, and the crypto version of this call doesn't have access
29 * to the context variable. Fortunately the only user of
30 * krb5_crypto_us_timeofday in the crypto library doesn't require that
31 * this time adjustment be done.
32 */
33
34 #include "k5-int.h"
35
36 krb5_error_code KRB5_CALLCONV
krb5_us_timeofday(krb5_context context,krb5_timestamp * seconds,krb5_int32 * microseconds)37 krb5_us_timeofday(krb5_context context, krb5_timestamp *seconds, krb5_int32 *microseconds)
38 {
39 krb5_os_context os_ctx = context->os_context;
40 krb5_int32 sec, usec;
41 krb5_error_code retval;
42
43 if (os_ctx->os_flags & KRB5_OS_TOFFSET_TIME) {
44 *seconds = os_ctx->time_offset;
45 *microseconds = os_ctx->usec_offset;
46 return 0;
47 }
48 retval = krb5_crypto_us_timeofday(&sec, &usec);
49 if (retval)
50 return retval;
51 if (os_ctx->os_flags & KRB5_OS_TOFFSET_VALID) {
52 usec += os_ctx->usec_offset;
53 if (usec > 1000000) {
54 usec -= 1000000;
55 sec++;
56 }
57 if (usec < 0) {
58 usec += 1000000;
59 sec--;
60 }
61 sec += os_ctx->time_offset;
62 }
63 *seconds = sec;
64 *microseconds = usec;
65 return 0;
66 }
67