1/*
2 * Copyright (c) 1997-2004 Kungliga Tekniska H�gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include "krb5_locl.h"
35
36RCSID("$Id: time.c 14308 2004-10-13 17:57:11Z lha $");
37
38/*
39 * Set the absolute time that the caller knows the kdc has so the
40 * kerberos library can calculate the relative diffrence beteen the
41 * KDC time and local system time.
42 */
43
44krb5_error_code KRB5_LIB_FUNCTION
45krb5_set_real_time (krb5_context context,
46		    krb5_timestamp sec,
47		    int32_t usec)
48{
49    struct timeval tv;
50
51    gettimeofday(&tv, NULL);
52
53    context->kdc_sec_offset = sec - tv.tv_sec;
54    context->kdc_usec_offset = usec - tv.tv_usec;
55
56    if (context->kdc_usec_offset < 0) {
57	context->kdc_sec_offset--;
58	context->kdc_usec_offset += 1000000;
59    }
60    return 0;
61}
62
63/*
64 * return ``corrected'' time in `timeret'.
65 */
66
67krb5_error_code KRB5_LIB_FUNCTION
68krb5_timeofday (krb5_context context,
69		krb5_timestamp *timeret)
70{
71    *timeret = time(NULL) + context->kdc_sec_offset;
72    return 0;
73}
74
75/*
76 * like gettimeofday but with time correction to the KDC
77 */
78
79krb5_error_code KRB5_LIB_FUNCTION
80krb5_us_timeofday (krb5_context context,
81		   krb5_timestamp *sec,
82		   int32_t *usec)
83{
84    struct timeval tv;
85
86    gettimeofday (&tv, NULL);
87
88    *sec  = tv.tv_sec + context->kdc_sec_offset;
89    *usec = tv.tv_usec;		/* XXX */
90    return 0;
91}
92
93krb5_error_code KRB5_LIB_FUNCTION
94krb5_format_time(krb5_context context, time_t t,
95		 char *s, size_t len, krb5_boolean include_time)
96{
97    struct tm *tm;
98    if(context->log_utc)
99	tm = gmtime (&t);
100    else
101	tm = localtime(&t);
102    if(tm == NULL ||
103       strftime(s, len, include_time ? context->time_fmt : context->date_fmt, tm) == 0)
104	snprintf(s, len, "%ld", (long)t);
105    return 0;
106}
107
108krb5_error_code KRB5_LIB_FUNCTION
109krb5_string_to_deltat(const char *string, krb5_deltat *deltat)
110{
111    if((*deltat = parse_time(string, "s")) == -1)
112	return KRB5_DELTAT_BADFORMAT;
113    return 0;
114}
115