1/*	$NetBSD: time.c,v 1.1.1.1 2011/04/13 18:15:38 elric Exp $	*/
2
3/*
4 * Copyright (c) 1997-2004 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include "krb5_locl.h"
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 * @param context Keberos 5 context.
44 * @param sec The applications new of "now" in seconds
45 * @param usec The applications new of "now" in micro seconds
46
47 * @return Kerberos 5 error code, see krb5_get_error_message().
48 *
49 * @ingroup krb5
50 */
51
52KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
53krb5_set_real_time (krb5_context context,
54		    krb5_timestamp sec,
55		    int32_t usec)
56{
57    struct timeval tv;
58
59    gettimeofday(&tv, NULL);
60
61    context->kdc_sec_offset = sec - tv.tv_sec;
62
63    /**
64     * If the caller passes in a negative usec, its assumed to be
65     * unknown and the function will use the current time usec.
66     */
67    if (usec >= 0) {
68	context->kdc_usec_offset = usec - tv.tv_usec;
69
70	if (context->kdc_usec_offset < 0) {
71	    context->kdc_sec_offset--;
72	    context->kdc_usec_offset += 1000000;
73	}
74    } else
75	context->kdc_usec_offset = tv.tv_usec;
76
77    return 0;
78}
79
80/*
81 * return ``corrected'' time in `timeret'.
82 */
83
84KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
85krb5_timeofday (krb5_context context,
86		krb5_timestamp *timeret)
87{
88    *timeret = time(NULL) + context->kdc_sec_offset;
89    return 0;
90}
91
92/*
93 * like gettimeofday but with time correction to the KDC
94 */
95
96KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
97krb5_us_timeofday (krb5_context context,
98		   krb5_timestamp *sec,
99		   int32_t *usec)
100{
101    struct timeval tv;
102
103    gettimeofday (&tv, NULL);
104
105    *sec  = tv.tv_sec + context->kdc_sec_offset;
106    *usec = tv.tv_usec;		/* XXX */
107    return 0;
108}
109
110KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
111krb5_format_time(krb5_context context, time_t t,
112		 char *s, size_t len, krb5_boolean include_time)
113{
114    struct tm *tm;
115    if(context->log_utc)
116	tm = gmtime (&t);
117    else
118	tm = localtime(&t);
119    if(tm == NULL ||
120       strftime(s, len, include_time ? context->time_fmt : context->date_fmt, tm) == 0)
121	snprintf(s, len, "%ld", (long)t);
122    return 0;
123}
124
125KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
126krb5_string_to_deltat(const char *string, krb5_deltat *deltat)
127{
128    if((*deltat = parse_time(string, "s")) == -1)
129	return KRB5_DELTAT_BADFORMAT;
130    return 0;
131}
132