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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/o_time.c
1 /* crypto/o_time.c -*- mode:C; c-file-style: "eay" -*- */
3 * Written by Richard Levitte (richard@levitte.org) for the OpenSSL project
7 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
10 /* ====================================================================
11 * Copyright (c) 2001 The OpenSSL Project. All rights reserved.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in
22 * the documentation and/or other materials provided with the
25 * 3. All advertising materials mentioning features or use of this
26 * software must display the following acknowledgment:
27 * "This product includes software developed by the OpenSSL Project
28 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
30 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
31 * endorse or promote products derived from this software without
32 * prior written permission. For written permission, please contact
33 * licensing@OpenSSL.org.
35 * 5. Products derived from this software may not be called "OpenSSL"
36 * nor may "OpenSSL" appear in their names without prior written
37 * permission of the OpenSSL Project.
39 * 6. Redistributions of any form whatsoever must retain the following
41 * "This product includes software developed by the OpenSSL Project
42 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
44 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
45 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
47 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
48 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
49 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
51 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
53 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
54 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
55 * OF THE POSSIBILITY OF SUCH DAMAGE.
56 * ====================================================================
58 * This product includes cryptographic software written by Eric Young
59 * (eay@cryptsoft.com). This product includes software written by Tim
60 * Hudson (tjh@cryptsoft.com).
64 #include <openssl/e_os2.h>
68 #ifdef OPENSSL_SYS_VMS
69 # if __CRTL_VER >= 70000000 && \
70 (defined _POSIX_C_SOURCE || !defined _ANSI_C_SOURCE)
71 # define VMS_GMTIME_OK
73 # ifndef VMS_GMTIME_OK
74 # include <libdtdef.h>
75 # include <lib$routines.h>
80 # endif /* ndef VMS_GMTIME_OK */
83 struct tm
*OPENSSL_gmtime(const time_t *timer
, struct tm
*result
)
87 #if defined(OPENSSL_THREADS) && !defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_SYS_OS2) && (!defined(OPENSSL_SYS_VMS) || defined(gmtime_r)) && !defined(OPENSSL_SYS_MACOSX) && !defined(OPENSSL_SYS_SUNOS)
89 * should return &data, but doesn't on some systems, so we don't even
90 * look at the return value
92 gmtime_r(timer
, result
);
94 #elif !defined(OPENSSL_SYS_VMS) || defined(VMS_GMTIME_OK)
99 memcpy(result
, ts
, sizeof(struct tm
));
102 #if defined( OPENSSL_SYS_VMS) && !defined( VMS_GMTIME_OK)
104 static $
DESCRIPTOR(tabnam
, "LNM$DCL_LOGICAL");
105 static $
DESCRIPTOR(lognam
, "SYS$TIMEZONE_DIFFERENTIAL");
107 unsigned int reslen
= 0;
112 unsigned int *reslen
;
124 /* Get the value for SYS$TIMEZONE_DIFFERENTIAL */
125 itemlist
[0].buflen
= sizeof(logvalue
);
126 itemlist
[0].bufaddr
= logvalue
;
127 itemlist
[0].reslen
= &reslen
;
128 status
= sys$
trnlnm(0, &tabnam
, &lognam
, 0, itemlist
);
131 logvalue
[reslen
] = '\0';
135 /* The following is extracted from the DEC C header time.h */
137 ** Beginning in OpenVMS Version 7.0 mktime, time, ctime, strftime
138 ** have two implementations. One implementation is provided
139 ** for compatibility and deals with time in terms of local time,
140 ** the other __utc_* deals with time in terms of UTC.
143 * We use the same conditions as in said time.h to check if we should
144 * assume that t contains local time (and should therefore be
145 * adjusted) or UTC (and should therefore be left untouched).
147 # if __CRTL_VER < 70000000 || defined _VMS_V6_SOURCE
148 /* Get the numerical value of the equivalence string */
149 status
= atoi(logvalue
);
151 /* and use it to move time to GMT */
155 /* then convert the result to the time structure */
158 * Since there was no gmtime_r() to do this stuff for us, we have to
159 * do it the hard way.
163 * The VMS epoch is the astronomical Smithsonian date,
164 if I remember correctly, which is November 17, 1858.
165 Furthermore, time is measure in thenths of microseconds
166 and stored in quadwords (64 bit integers). unix_epoch
167 below is January 1st 1970 expressed as a VMS time. The
168 following code was used to get this number:
172 #include <lib$routines.h>
177 unsigned long systime[2];
178 unsigned short epoch_values[7] =
179 { 1970, 1, 1, 0, 0, 0, 0 };
181 lib$cvt_vectim(epoch_values, systime);
183 printf("%u %u", systime[0], systime[1]);
186 unsigned long unix_epoch
[2] = { 1273708544, 8164711 };
187 unsigned long deltatime
[2];
188 unsigned long systime
[2];
190 short year
, month
, day
, hour
, minute
, second
, centi_second
;
195 * Turn the number of seconds since January 1st 1970 to an
196 * internal delta time. Note that lib$cvt_to_internal_time() will
197 * assume that t is signed, and will therefore break on 32-bit
198 * systems some time in 2038.
200 operation
= LIB$K_DELTA_SECONDS
;
201 status
= lib$
cvt_to_internal_time(&operation
, &t
, deltatime
);
204 * Add the delta time with the Unix epoch and we have the current
205 * UTC time in internal format
207 status
= lib$
add_times(unix_epoch
, deltatime
, systime
);
209 /* Turn the internal time into a time vector */
210 status
= sys$
numtim(&time_values
, systime
);
212 /* Fill in the struct tm with the result */
213 result
->tm_sec
= time_values
.second
;
214 result
->tm_min
= time_values
.minute
;
215 result
->tm_hour
= time_values
.hour
;
216 result
->tm_mday
= time_values
.day
;
217 result
->tm_mon
= time_values
.month
- 1;
218 result
->tm_year
= time_values
.year
- 1900;
220 operation
= LIB$K_DAY_OF_WEEK
;
221 status
= lib$
cvt_from_internal_time(&operation
,
222 &result
->tm_wday
, systime
);
223 result
->tm_wday
%= 7;
225 operation
= LIB$K_DAY_OF_YEAR
;
226 status
= lib$
cvt_from_internal_time(&operation
,
227 &result
->tm_yday
, systime
);
230 result
->tm_isdst
= 0; /* There's no way to know... */
240 * Take a tm structure and add an offset to it. This avoids any OS issues
241 * with restricted date types and overflows which cause the year 2038
245 #define SECS_PER_DAY (24 * 60 * 60)
247 static long date_to_julian(int y
, int m
, int d
);
248 static void julian_to_date(long jd
, int *y
, int *m
, int *d
);
250 int OPENSSL_gmtime_adj(struct tm
*tm
, int off_day
, long offset_sec
)
252 int offset_hms
, offset_day
;
254 int time_year
, time_month
, time_day
;
255 /* split offset into days and day seconds */
256 offset_day
= offset_sec
/ SECS_PER_DAY
;
257 /* Avoid sign issues with % operator */
258 offset_hms
= offset_sec
- (offset_day
* SECS_PER_DAY
);
259 offset_day
+= off_day
;
260 /* Add current time seconds to offset */
261 offset_hms
+= tm
->tm_hour
* 3600 + tm
->tm_min
* 60 + tm
->tm_sec
;
262 /* Adjust day seconds if overflow */
263 if (offset_hms
>= SECS_PER_DAY
) {
265 offset_hms
-= SECS_PER_DAY
;
266 } else if (offset_hms
< 0) {
268 offset_hms
+= SECS_PER_DAY
;
272 * Convert date of time structure into a Julian day number.
275 time_year
= tm
->tm_year
+ 1900;
276 time_month
= tm
->tm_mon
+ 1;
277 time_day
= tm
->tm_mday
;
279 time_jd
= date_to_julian(time_year
, time_month
, time_day
);
281 /* Work out Julian day of new date */
282 time_jd
+= offset_day
;
287 /* Convert Julian day back to date */
289 julian_to_date(time_jd
, &time_year
, &time_month
, &time_day
);
291 if (time_year
< 1900 || time_year
> 9999)
294 /* Update tm structure */
296 tm
->tm_year
= time_year
- 1900;
297 tm
->tm_mon
= time_month
- 1;
298 tm
->tm_mday
= time_day
;
300 tm
->tm_hour
= offset_hms
/ 3600;
301 tm
->tm_min
= (offset_hms
/ 60) % 60;
302 tm
->tm_sec
= offset_hms
% 60;
309 * Convert date to and from julian day Uses Fliegel & Van Flandern algorithm
311 static long date_to_julian(int y
, int m
, int d
)
313 return (1461 * (y
+ 4800 + (m
- 14) / 12)) / 4 +
314 (367 * (m
- 2 - 12 * ((m
- 14) / 12))) / 12 -
315 (3 * ((y
+ 4900 + (m
- 14) / 12) / 100)) / 4 + d
- 32075;
318 static void julian_to_date(long jd
, int *y
, int *m
, int *d
)
321 long n
= (4 * L
) / 146097;
324 L
= L
- (146097 * n
+ 3) / 4;
325 i
= (4000 * (L
+ 1)) / 1461001;
326 L
= L
- (1461 * i
) / 4 + 31;
328 *d
= L
- (2447 * j
) / 80;
330 *m
= j
+ 2 - (12 * L
);
331 *y
= 100 * (n
- 49) + i
+ L
;
334 #ifdef OPENSSL_TIME_TEST
339 * Time checking test code. Check times are identical for a wide range of
340 * offsets. This should be run on a machine with 64 bit time_t or it will
341 * trigger the very errors the routines fix.
344 int main(int argc
, char **argv
)
347 for (offset
= 0; offset
< 1000000; offset
++) {
350 check_time(offset
* 1000);
351 check_time(-offset
* 1000);
355 int check_time(long offset
)
361 OPENSSL_gmtime(&t2
, &tm2
);
362 OPENSSL_gmtime(&t1
, &tm1
);
363 OPENSSL_gmtime_adj(&tm1
, 0, offset
);
364 if ((tm1
.tm_year
== tm2
.tm_year
) &&
365 (tm1
.tm_mon
== tm2
.tm_mon
) &&
366 (tm1
.tm_mday
== tm2
.tm_mday
) &&
367 (tm1
.tm_hour
== tm2
.tm_hour
) &&
368 (tm1
.tm_min
== tm2
.tm_min
) && (tm1
.tm_sec
== tm2
.tm_sec
))
370 fprintf(stderr
, "TIME ERROR!!\n");
371 fprintf(stderr
, "Time1: %d/%d/%d, %d:%02d:%02d\n",
372 tm2
.tm_mday
, tm2
.tm_mon
+ 1, tm2
.tm_year
+ 1900,
373 tm2
.tm_hour
, tm2
.tm_min
, tm2
.tm_sec
);
374 fprintf(stderr
, "Time2: %d/%d/%d, %d:%02d:%02d\n",
375 tm1
.tm_mday
, tm1
.tm_mon
+ 1, tm1
.tm_year
+ 1900,
376 tm1
.tm_hour
, tm1
.tm_min
, tm1
.tm_sec
);