1 /* crypto/o_time.c -*- mode:C; c-file-style: "eay" -*- */
2 /* Written by Richard Levitte (richard@levitte.org) for the OpenSSL
5 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
8 /* ====================================================================
9 * Copyright (c) 2001 The OpenSSL Project. All rights reserved.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in
20 * the documentation and/or other materials provided with the
23 * 3. All advertising materials mentioning features or use of this
24 * software must display the following acknowledgment:
25 * "This product includes software developed by the OpenSSL Project
26 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
28 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
29 * endorse or promote products derived from this software without
30 * prior written permission. For written permission, please contact
31 * licensing@OpenSSL.org.
33 * 5. Products derived from this software may not be called "OpenSSL"
34 * nor may "OpenSSL" appear in their names without prior written
35 * permission of the OpenSSL Project.
37 * 6. Redistributions of any form whatsoever must retain the following
39 * "This product includes software developed by the OpenSSL Project
40 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
42 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
43 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
45 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
46 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
47 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
48 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
49 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
51 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
52 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
53 * OF THE POSSIBILITY OF SUCH DAMAGE.
54 * ====================================================================
56 * This product includes cryptographic software written by Eric Young
57 * (eay@cryptsoft.com). This product includes software written by Tim
58 * Hudson (tjh@cryptsoft.com).
62 #include <openssl/e_os2.h>
66 #ifdef OPENSSL_SYS_VMS
67 # if __CRTL_VER >= 70000000 && \
68 (defined _POSIX_C_SOURCE || !defined _ANSI_C_SOURCE)
69 # define VMS_GMTIME_OK
71 # ifndef VMS_GMTIME_OK
72 # include <libdtdef.h>
73 # include <lib$routines.h>
78 # endif /* ndef VMS_GMTIME_OK */
81 struct tm *OPENSSL_gmtime(const time_t *timer, struct tm *result)
85 #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)
86 /* should return &data, but doesn't on some systems,
87 so we don't even look at the return value */
88 gmtime_r(timer,result);
90 #elif !defined(OPENSSL_SYS_VMS) || defined(VMS_GMTIME_OK)
95 memcpy(result, ts, sizeof(struct tm));
98 #if defined( OPENSSL_SYS_VMS) && !defined( VMS_GMTIME_OK)
101 static $DESCRIPTOR(tabnam,"LNM$DCL_LOGICAL");
102 static $DESCRIPTOR(lognam,"SYS$TIMEZONE_DIFFERENTIAL");
104 unsigned int reslen = 0;
109 unsigned int *reslen;
111 { 0, LNM$_STRING, 0, 0 },
117 /* Get the value for SYS$TIMEZONE_DIFFERENTIAL */
118 itemlist[0].buflen = sizeof(logvalue);
119 itemlist[0].bufaddr = logvalue;
120 itemlist[0].reslen = &reslen;
121 status = sys$trnlnm(0, &tabnam, &lognam, 0, itemlist);
124 logvalue[reslen] = '\0';
128 /* The following is extracted from the DEC C header time.h */
130 ** Beginning in OpenVMS Version 7.0 mktime, time, ctime, strftime
131 ** have two implementations. One implementation is provided
132 ** for compatibility and deals with time in terms of local time,
133 ** the other __utc_* deals with time in terms of UTC.
135 /* We use the same conditions as in said time.h to check if we should
136 assume that t contains local time (and should therefore be adjusted)
137 or UTC (and should therefore be left untouched). */
138 #if __CRTL_VER < 70000000 || defined _VMS_V6_SOURCE
139 /* Get the numerical value of the equivalence string */
140 status = atoi(logvalue);
142 /* and use it to move time to GMT */
146 /* then convert the result to the time structure */
148 /* Since there was no gmtime_r() to do this stuff for us,
149 we have to do it the hard way. */
151 /* The VMS epoch is the astronomical Smithsonian date,
152 if I remember correctly, which is November 17, 1858.
153 Furthermore, time is measure in thenths of microseconds
154 and stored in quadwords (64 bit integers). unix_epoch
155 below is January 1st 1970 expressed as a VMS time. The
156 following code was used to get this number:
160 #include <lib$routines.h>
165 unsigned long systime[2];
166 unsigned short epoch_values[7] =
167 { 1970, 1, 1, 0, 0, 0, 0 };
169 lib$cvt_vectim(epoch_values, systime);
171 printf("%u %u", systime[0], systime[1]);
174 unsigned long unix_epoch[2] = { 1273708544, 8164711 };
175 unsigned long deltatime[2];
176 unsigned long systime[2];
179 short year, month, day, hour, minute, second,
184 /* Turn the number of seconds since January 1st 1970 to
185 an internal delta time.
186 Note that lib$cvt_to_internal_time() will assume
187 that t is signed, and will therefore break on 32-bit
188 systems some time in 2038.
190 operation = LIB$K_DELTA_SECONDS;
191 status = lib$cvt_to_internal_time(&operation,
194 /* Add the delta time with the Unix epoch and we have
195 the current UTC time in internal format */
196 status = lib$add_times(unix_epoch, deltatime, systime);
198 /* Turn the internal time into a time vector */
199 status = sys$numtim(&time_values, systime);
201 /* Fill in the struct tm with the result */
202 result->tm_sec = time_values.second;
203 result->tm_min = time_values.minute;
204 result->tm_hour = time_values.hour;
205 result->tm_mday = time_values.day;
206 result->tm_mon = time_values.month - 1;
207 result->tm_year = time_values.year - 1900;
209 operation = LIB$K_DAY_OF_WEEK;
210 status = lib$cvt_from_internal_time(&operation,
211 &result->tm_wday, systime);
212 result->tm_wday %= 7;
214 operation = LIB$K_DAY_OF_YEAR;
215 status = lib$cvt_from_internal_time(&operation,
216 &result->tm_yday, systime);
219 result->tm_isdst = 0; /* There's no way to know... */
228 /* Take a tm structure and add an offset to it. This avoids any OS issues
229 * with restricted date types and overflows which cause the year 2038
233 #define SECS_PER_DAY (24 * 60 * 60)
235 static long date_to_julian(int y, int m, int d);
236 static void julian_to_date(long jd, int *y, int *m, int *d);
237 static int julian_adj(const struct tm *tm, int off_day, long offset_sec,
238 long *pday, int *psec);
240 int OPENSSL_gmtime_adj(struct tm *tm, int off_day, long offset_sec)
242 int time_sec, time_year, time_month, time_day;
245 /* Convert time and offset into julian day and seconds */
246 if (!julian_adj(tm, off_day, offset_sec, &time_jd, &time_sec))
249 /* Convert Julian day back to date */
251 julian_to_date(time_jd, &time_year, &time_month, &time_day);
253 if (time_year < 1900 || time_year > 9999)
256 /* Update tm structure */
258 tm->tm_year = time_year - 1900;
259 tm->tm_mon = time_month - 1;
260 tm->tm_mday = time_day;
262 tm->tm_hour = time_sec / 3600;
263 tm->tm_min = (time_sec / 60) % 60;
264 tm->tm_sec = time_sec % 60;
270 int OPENSSL_gmtime_diff(int *pday, int *psec,
271 const struct tm *from, const struct tm *to)
273 int from_sec, to_sec, diff_sec;
274 long from_jd, to_jd, diff_day;
275 if (!julian_adj(from, 0, 0, &from_jd, &from_sec))
277 if (!julian_adj(to, 0, 0, &to_jd, &to_sec))
279 diff_day = to_jd - from_jd;
280 diff_sec = to_sec - from_sec;
281 /* Adjust differences so both positive or both negative */
282 if (diff_day > 0 && diff_sec < 0)
285 diff_sec += SECS_PER_DAY;
287 if (diff_day < 0 && diff_sec > 0)
290 diff_sec -= SECS_PER_DAY;
294 *pday = (int)diff_day;
303 /* Convert tm structure and offset into julian day and seconds */
304 static int julian_adj(const struct tm *tm, int off_day, long offset_sec,
305 long *pday, int *psec)
307 int offset_hms, offset_day;
309 int time_year, time_month, time_day;
310 /* split offset into days and day seconds */
311 offset_day = offset_sec / SECS_PER_DAY;
312 /* Avoid sign issues with % operator */
313 offset_hms = offset_sec - (offset_day * SECS_PER_DAY);
314 offset_day += off_day;
315 /* Add current time seconds to offset */
316 offset_hms += tm->tm_hour * 3600 + tm->tm_min * 60 + tm->tm_sec;
317 /* Adjust day seconds if overflow */
318 if (offset_hms >= SECS_PER_DAY)
321 offset_hms -= SECS_PER_DAY;
323 else if (offset_hms < 0)
326 offset_hms += SECS_PER_DAY;
329 /* Convert date of time structure into a Julian day number.
332 time_year = tm->tm_year + 1900;
333 time_month = tm->tm_mon + 1;
334 time_day = tm->tm_mday;
336 time_jd = date_to_julian(time_year, time_month, time_day);
338 /* Work out Julian day of new date */
339 time_jd += offset_day;
350 /* Convert date to and from julian day
351 * Uses Fliegel & Van Flandern algorithm
353 static long date_to_julian(int y, int m, int d)
355 return (1461 * (y + 4800 + (m - 14) / 12)) / 4 +
356 (367 * (m - 2 - 12 * ((m - 14) / 12))) / 12 -
357 (3 * ((y + 4900 + (m - 14) / 12) / 100)) / 4 +
361 static void julian_to_date(long jd, int *y, int *m, int *d)
364 long n = (4 * L) / 146097;
367 L = L - (146097 * n + 3) / 4;
368 i = (4000 * (L + 1)) / 1461001;
369 L = L - (1461 * i) / 4 + 31;
371 *d = L - (2447 * j) / 80;
373 *m = j + 2 - (12 * L);
374 *y = 100 * (n - 49) + i + L;
377 #ifdef OPENSSL_TIME_TEST
381 /* Time checking test code. Check times are identical for a wide range of
382 * offsets. This should be run on a machine with 64 bit time_t or it will
383 * trigger the very errors the routines fix.
386 int main(int argc, char **argv)
389 for (offset = 0; offset < 1000000; offset++)
393 check_time(offset * 1000);
394 check_time(-offset * 1000);
398 int check_time(long offset)
400 struct tm tm1, tm2, o1;
401 int off_day, off_sec;
406 OPENSSL_gmtime(&t2, &tm2);
407 OPENSSL_gmtime(&t1, &tm1);
409 OPENSSL_gmtime_adj(&tm1, 0, offset);
410 if ((tm1.tm_year != tm2.tm_year) ||
411 (tm1.tm_mon != tm2.tm_mon) ||
412 (tm1.tm_mday != tm2.tm_mday) ||
413 (tm1.tm_hour != tm2.tm_hour) ||
414 (tm1.tm_min != tm2.tm_min) ||
415 (tm1.tm_sec != tm2.tm_sec))
417 fprintf(stderr, "TIME ERROR!!\n");
418 fprintf(stderr, "Time1: %d/%d/%d, %d:%02d:%02d\n",
419 tm2.tm_mday, tm2.tm_mon + 1, tm2.tm_year + 1900,
420 tm2.tm_hour, tm2.tm_min, tm2.tm_sec);
421 fprintf(stderr, "Time2: %d/%d/%d, %d:%02d:%02d\n",
422 tm1.tm_mday, tm1.tm_mon + 1, tm1.tm_year + 1900,
423 tm1.tm_hour, tm1.tm_min, tm1.tm_sec);
426 OPENSSL_gmtime_diff(&o1, &tm1, &off_day, &off_sec);
427 toffset = (long)off_day * SECS_PER_DAY + off_sec;
428 if (offset != toffset)
430 fprintf(stderr, "TIME OFFSET ERROR!!\n");
431 fprintf(stderr, "Expected %ld, Got %ld (%d:%d)\n",
432 offset, toffset, off_day, off_sec);