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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/o_time.c
2 * Written by Richard Levitte (richard@levitte.org) for the OpenSSL project
6 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
9 /* ====================================================================
10 * Copyright (c) 2001 The OpenSSL Project. All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in
21 * the documentation and/or other materials provided with the
24 * 3. All advertising materials mentioning features or use of this
25 * software must display the following acknowledgment:
26 * "This product includes software developed by the OpenSSL Project
27 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
29 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
30 * endorse or promote products derived from this software without
31 * prior written permission. For written permission, please contact
32 * licensing@OpenSSL.org.
34 * 5. Products derived from this software may not be called "OpenSSL"
35 * nor may "OpenSSL" appear in their names without prior written
36 * permission of the OpenSSL Project.
38 * 6. Redistributions of any form whatsoever must retain the following
40 * "This product includes software developed by the OpenSSL Project
41 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
43 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
44 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
46 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
47 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
49 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
50 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
52 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
53 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
54 * OF THE POSSIBILITY OF SUCH DAMAGE.
55 * ====================================================================
57 * This product includes cryptographic software written by Eric Young
58 * (eay@cryptsoft.com). This product includes software written by Tim
59 * Hudson (tjh@cryptsoft.com).
63 #include <openssl/e_os2.h>
65 #include <openssl/crypto.h>
67 #ifdef OPENSSL_SYS_VMS
68 # if __CRTL_VER >= 70000000 && \
69 (defined _POSIX_C_SOURCE || !defined _ANSI_C_SOURCE)
70 # define VMS_GMTIME_OK
72 # ifndef VMS_GMTIME_OK
73 # include <libdtdef.h>
74 # include <lib$routines.h>
79 # endif /* ndef VMS_GMTIME_OK */
82 struct tm
*OPENSSL_gmtime(const time_t *timer
, struct tm
*result
)
86 #if defined(OPENSSL_THREADS) && !defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_SYS_OS2) && (!defined(OPENSSL_SYS_VMS) || defined(gmtime_r)) && !defined(OPENSSL_SYS_MACOSX)
88 * should return &data, but doesn't on some systems, so we don't even
89 * look at the return value
91 gmtime_r(timer
, result
);
93 #elif !defined(OPENSSL_SYS_VMS) || defined(VMS_GMTIME_OK)
98 memcpy(result
, ts
, sizeof(struct tm
));
101 #if defined( OPENSSL_SYS_VMS) && !defined( VMS_GMTIME_OK)
103 static $
DESCRIPTOR(tabnam
, "LNM$DCL_LOGICAL");
104 static $
DESCRIPTOR(lognam
, "SYS$TIMEZONE_DIFFERENTIAL");
106 unsigned int reslen
= 0;
111 unsigned int *reslen
;
123 /* Get the value for SYS$TIMEZONE_DIFFERENTIAL */
124 itemlist
[0].buflen
= sizeof(logvalue
);
125 itemlist
[0].bufaddr
= logvalue
;
126 itemlist
[0].reslen
= &reslen
;
127 status
= sys$
trnlnm(0, &tabnam
, &lognam
, 0, itemlist
);
130 logvalue
[reslen
] = '\0';
134 /* The following is extracted from the DEC C header time.h */
136 ** Beginning in OpenVMS Version 7.0 mktime, time, ctime, strftime
137 ** have two implementations. One implementation is provided
138 ** for compatibility and deals with time in terms of local time,
139 ** the other __utc_* deals with time in terms of UTC.
142 * We use the same conditions as in said time.h to check if we should
143 * assume that t contains local time (and should therefore be
144 * adjusted) or UTC (and should therefore be left untouched).
146 # if __CRTL_VER < 70000000 || defined _VMS_V6_SOURCE
147 /* Get the numerical value of the equivalence string */
148 status
= atoi(logvalue
);
150 /* and use it to move time to GMT */
154 /* then convert the result to the time structure */
157 * Since there was no gmtime_r() to do this stuff for us, we have to
158 * do it the hard way.
162 * The VMS epoch is the astronomical Smithsonian date,
163 if I remember correctly, which is November 17, 1858.
164 Furthermore, time is measure in thenths of microseconds
165 and stored in quadwords (64 bit integers). unix_epoch
166 below is January 1st 1970 expressed as a VMS time. The
167 following code was used to get this number:
171 #include <lib$routines.h>
176 unsigned long systime[2];
177 unsigned short epoch_values[7] =
178 { 1970, 1, 1, 0, 0, 0, 0 };
180 lib$cvt_vectim(epoch_values, systime);
182 printf("%u %u", systime[0], systime[1]);
185 unsigned long unix_epoch
[2] = { 1273708544, 8164711 };
186 unsigned long deltatime
[2];
187 unsigned long systime
[2];
189 short year
, month
, day
, hour
, minute
, second
, centi_second
;
194 * Turn the number of seconds since January 1st 1970 to an
195 * internal delta time. Note that lib$cvt_to_internal_time() will
196 * assume that t is signed, and will therefore break on 32-bit
197 * systems some time in 2038.
199 operation
= LIB$K_DELTA_SECONDS
;
200 status
= lib$
cvt_to_internal_time(&operation
, &t
, deltatime
);
203 * Add the delta time with the Unix epoch and we have the current
204 * UTC time in internal format
206 status
= lib$
add_times(unix_epoch
, deltatime
, systime
);
208 /* Turn the internal time into a time vector */
209 status
= sys$
numtim(&time_values
, systime
);
211 /* Fill in the struct tm with the result */
212 result
->tm_sec
= time_values
.second
;
213 result
->tm_min
= time_values
.minute
;
214 result
->tm_hour
= time_values
.hour
;
215 result
->tm_mday
= time_values
.day
;
216 result
->tm_mon
= time_values
.month
- 1;
217 result
->tm_year
= time_values
.year
- 1900;
219 operation
= LIB$K_DAY_OF_WEEK
;
220 status
= lib$
cvt_from_internal_time(&operation
,
221 &result
->tm_wday
, systime
);
222 result
->tm_wday
%= 7;
224 operation
= LIB$K_DAY_OF_YEAR
;
225 status
= lib$
cvt_from_internal_time(&operation
,
226 &result
->tm_yday
, systime
);
229 result
->tm_isdst
= 0; /* There's no way to know... */
239 * Take a tm structure and add an offset to it. This avoids any OS issues
240 * with restricted date types and overflows which cause the year 2038
244 #define SECS_PER_DAY (24 * 60 * 60)
246 static long date_to_julian(int y
, int m
, int d
);
247 static void julian_to_date(long jd
, int *y
, int *m
, int *d
);
248 static int julian_adj(const struct tm
*tm
, int off_day
, long offset_sec
,
249 long *pday
, int *psec
);
251 int OPENSSL_gmtime_adj(struct tm
*tm
, int off_day
, long offset_sec
)
253 int time_sec
, time_year
, time_month
, time_day
;
256 /* Convert time and offset into julian day and seconds */
257 if (!julian_adj(tm
, off_day
, offset_sec
, &time_jd
, &time_sec
))
260 /* Convert Julian day back to date */
262 julian_to_date(time_jd
, &time_year
, &time_month
, &time_day
);
264 if (time_year
< 1900 || time_year
> 9999)
267 /* Update tm structure */
269 tm
->tm_year
= time_year
- 1900;
270 tm
->tm_mon
= time_month
- 1;
271 tm
->tm_mday
= time_day
;
273 tm
->tm_hour
= time_sec
/ 3600;
274 tm
->tm_min
= (time_sec
/ 60) % 60;
275 tm
->tm_sec
= time_sec
% 60;
281 int OPENSSL_gmtime_diff(int *pday
, int *psec
,
282 const struct tm
*from
, const struct tm
*to
)
284 int from_sec
, to_sec
, diff_sec
;
285 long from_jd
, to_jd
, diff_day
;
286 if (!julian_adj(from
, 0, 0, &from_jd
, &from_sec
))
288 if (!julian_adj(to
, 0, 0, &to_jd
, &to_sec
))
290 diff_day
= to_jd
- from_jd
;
291 diff_sec
= to_sec
- from_sec
;
292 /* Adjust differences so both positive or both negative */
293 if (diff_day
> 0 && diff_sec
< 0) {
295 diff_sec
+= SECS_PER_DAY
;
297 if (diff_day
< 0 && diff_sec
> 0) {
299 diff_sec
-= SECS_PER_DAY
;
303 *pday
= (int)diff_day
;
311 /* Convert tm structure and offset into julian day and seconds */
312 static int julian_adj(const struct tm
*tm
, int off_day
, long offset_sec
,
313 long *pday
, int *psec
)
315 int offset_hms
, offset_day
;
317 int time_year
, time_month
, time_day
;
318 /* split offset into days and day seconds */
319 offset_day
= offset_sec
/ SECS_PER_DAY
;
320 /* Avoid sign issues with % operator */
321 offset_hms
= offset_sec
- (offset_day
* SECS_PER_DAY
);
322 offset_day
+= off_day
;
323 /* Add current time seconds to offset */
324 offset_hms
+= tm
->tm_hour
* 3600 + tm
->tm_min
* 60 + tm
->tm_sec
;
325 /* Adjust day seconds if overflow */
326 if (offset_hms
>= SECS_PER_DAY
) {
328 offset_hms
-= SECS_PER_DAY
;
329 } else if (offset_hms
< 0) {
331 offset_hms
+= SECS_PER_DAY
;
335 * Convert date of time structure into a Julian day number.
338 time_year
= tm
->tm_year
+ 1900;
339 time_month
= tm
->tm_mon
+ 1;
340 time_day
= tm
->tm_mday
;
342 time_jd
= date_to_julian(time_year
, time_month
, time_day
);
344 /* Work out Julian day of new date */
345 time_jd
+= offset_day
;
356 * Convert date to and from julian day Uses Fliegel & Van Flandern algorithm
358 static long date_to_julian(int y
, int m
, int d
)
360 return (1461 * (y
+ 4800 + (m
- 14) / 12)) / 4 +
361 (367 * (m
- 2 - 12 * ((m
- 14) / 12))) / 12 -
362 (3 * ((y
+ 4900 + (m
- 14) / 12) / 100)) / 4 + d
- 32075;
365 static void julian_to_date(long jd
, int *y
, int *m
, int *d
)
368 long n
= (4 * L
) / 146097;
371 L
= L
- (146097 * n
+ 3) / 4;
372 i
= (4000 * (L
+ 1)) / 1461001;
373 L
= L
- (1461 * i
) / 4 + 31;
375 *d
= L
- (2447 * j
) / 80;
377 *m
= j
+ 2 - (12 * L
);
378 *y
= 100 * (n
- 49) + i
+ L
;