1 /* $NetBSD: time.c,v 1.2 2017/01/28 21:31:49 christos 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
52 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_set_real_time(krb5_context context,krb5_timestamp sec,int32_t usec)53 krb5_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
84 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_timeofday(krb5_context context,krb5_timestamp * timeret)85 krb5_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
96 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_us_timeofday(krb5_context context,krb5_timestamp * sec,int32_t * usec)97 krb5_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
110 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_format_time(krb5_context context,time_t t,char * s,size_t len,krb5_boolean include_time)111 krb5_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
125 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_string_to_deltat(const char * string,krb5_deltat * deltat)126 krb5_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