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 # include <libdtdef.h>
68 # include <lib$routines.h>
75 struct tm *OPENSSL_gmtime(const time_t *timer, struct tm *result)
79 #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)
80 /* should return &data, but doesn't on some systems,
81 so we don't even look at the return value */
82 gmtime_r(timer,result);
84 #elif !defined(OPENSSL_SYS_VMS)
89 memcpy(result, ts, sizeof(struct tm));
92 #ifdef OPENSSL_SYS_VMS
95 static $DESCRIPTOR(tabnam,"LNM$DCL_LOGICAL");
96 static $DESCRIPTOR(lognam,"SYS$TIMEZONE_DIFFERENTIAL");
98 unsigned int reslen = 0;
103 unsigned int *reslen;
105 { 0, LNM$_STRING, 0, 0 },
111 /* Get the value for SYS$TIMEZONE_DIFFERENTIAL */
112 itemlist[0].buflen = sizeof(logvalue);
113 itemlist[0].bufaddr = logvalue;
114 itemlist[0].reslen = &reslen;
115 status = sys$trnlnm(0, &tabnam, &lognam, 0, itemlist);
118 logvalue[reslen] = '\0';
122 /* The following is extracted from the DEC C header time.h */
124 ** Beginning in OpenVMS Version 7.0 mktime, time, ctime, strftime
125 ** have two implementations. One implementation is provided
126 ** for compatibility and deals with time in terms of local time,
127 ** the other __utc_* deals with time in terms of UTC.
129 /* We use the same conditions as in said time.h to check if we should
130 assume that t contains local time (and should therefore be adjusted)
131 or UTC (and should therefore be left untouched). */
132 #if __CRTL_VER < 70000000 || defined _VMS_V6_SOURCE
133 /* Get the numerical value of the equivalence string */
134 status = atoi(logvalue);
136 /* and use it to move time to GMT */
140 /* then convert the result to the time structure */
142 /* Since there was no gmtime_r() to do this stuff for us,
143 we have to do it the hard way. */
145 /* The VMS epoch is the astronomical Smithsonian date,
146 if I remember correctly, which is November 17, 1858.
147 Furthermore, time is measure in thenths of microseconds
148 and stored in quadwords (64 bit integers). unix_epoch
149 below is January 1st 1970 expressed as a VMS time. The
150 following code was used to get this number:
154 #include <lib$routines.h>
159 unsigned long systime[2];
160 unsigned short epoch_values[7] =
161 { 1970, 1, 1, 0, 0, 0, 0 };
163 lib$cvt_vectim(epoch_values, systime);
165 printf("%u %u", systime[0], systime[1]);
168 unsigned long unix_epoch[2] = { 1273708544, 8164711 };
169 unsigned long deltatime[2];
170 unsigned long systime[2];
173 short year, month, day, hour, minute, second,
178 /* Turn the number of seconds since January 1st 1970 to
179 an internal delta time.
180 Note that lib$cvt_to_internal_time() will assume
181 that t is signed, and will therefore break on 32-bit
182 systems some time in 2038.
184 operation = LIB$K_DELTA_SECONDS;
185 status = lib$cvt_to_internal_time(&operation,
188 /* Add the delta time with the Unix epoch and we have
189 the current UTC time in internal format */
190 status = lib$add_times(unix_epoch, deltatime, systime);
192 /* Turn the internal time into a time vector */
193 status = sys$numtim(&time_values, systime);
195 /* Fill in the struct tm with the result */
196 result->tm_sec = time_values.second;
197 result->tm_min = time_values.minute;
198 result->tm_hour = time_values.hour;
199 result->tm_mday = time_values.day;
200 result->tm_mon = time_values.month - 1;
201 result->tm_year = time_values.year - 1900;
203 operation = LIB$K_DAY_OF_WEEK;
204 status = lib$cvt_from_internal_time(&operation,
205 &result->tm_wday, systime);
206 result->tm_wday %= 7;
208 operation = LIB$K_DAY_OF_YEAR;
209 status = lib$cvt_from_internal_time(&operation,
210 &result->tm_yday, systime);
213 result->tm_isdst = 0; /* There's no way to know... */
222 /* Take a tm structure and add an offset to it. This avoids any OS issues
223 * with restricted date types and overflows which cause the year 2038
227 #define SECS_PER_DAY (24 * 60 * 60)
229 static long date_to_julian(int y, int m, int d);
230 static void julian_to_date(long jd, int *y, int *m, int *d);
232 int OPENSSL_gmtime_adj(struct tm *tm, int off_day, long offset_sec)
234 int offset_hms, offset_day;
236 int time_year, time_month, time_day;
237 /* split offset into days and day seconds */
238 offset_day = offset_sec / SECS_PER_DAY;
239 /* Avoid sign issues with % operator */
240 offset_hms = offset_sec - (offset_day * SECS_PER_DAY);
241 offset_day += off_day;
242 /* Add current time seconds to offset */
243 offset_hms += tm->tm_hour * 3600 + tm->tm_min * 60 + tm->tm_sec;
244 /* Adjust day seconds if overflow */
245 if (offset_hms >= SECS_PER_DAY)
248 offset_hms -= SECS_PER_DAY;
250 else if (offset_hms < 0)
253 offset_hms += SECS_PER_DAY;
256 /* Convert date of time structure into a Julian day number.
259 time_year = tm->tm_year + 1900;
260 time_month = tm->tm_mon + 1;
261 time_day = tm->tm_mday;
263 time_jd = date_to_julian(time_year, time_month, time_day);
265 /* Work out Julian day of new date */
266 time_jd += offset_day;
271 /* Convert Julian day back to date */
273 julian_to_date(time_jd, &time_year, &time_month, &time_day);
275 if (time_year < 1900 || time_year > 9999)
278 /* Update tm structure */
280 tm->tm_year = time_year - 1900;
281 tm->tm_mon = time_month - 1;
282 tm->tm_mday = time_day;
284 tm->tm_hour = offset_hms / 3600;
285 tm->tm_min = (offset_hms / 60) % 60;
286 tm->tm_sec = offset_hms % 60;
292 /* Convert date to and from julian day
293 * Uses Fliegel & Van Flandern algorithm
295 static long date_to_julian(int y, int m, int d)
297 return (1461 * (y + 4800 + (m - 14) / 12)) / 4 +
298 (367 * (m - 2 - 12 * ((m - 14) / 12))) / 12 -
299 (3 * ((y + 4900 + (m - 14) / 12) / 100)) / 4 +
303 static void julian_to_date(long jd, int *y, int *m, int *d)
306 long n = (4 * L) / 146097;
309 L = L - (146097 * n + 3) / 4;
310 i = (4000 * (L + 1)) / 1461001;
311 L = L - (1461 * i) / 4 + 31;
313 *d = L - (2447 * j) / 80;
315 *m = j + 2 - (12 * L);
316 *y = 100 * (n - 49) + i + L;
319 #ifdef OPENSSL_TIME_TEST
323 /* Time checking test code. Check times are identical for a wide range of
324 * offsets. This should be run on a machine with 64 bit time_t or it will
325 * trigger the very errors the routines fix.
328 int main(int argc, char **argv)
331 for (offset = 0; offset < 1000000; offset++)
335 check_time(offset * 1000);
336 check_time(-offset * 1000);
340 int check_time(long offset)
346 OPENSSL_gmtime(&t2, &tm2);
347 OPENSSL_gmtime(&t1, &tm1);
348 OPENSSL_gmtime_adj(&tm1, 0, offset);
349 if ((tm1.tm_year == tm2.tm_year) &&
350 (tm1.tm_mon == tm2.tm_mon) &&
351 (tm1.tm_mday == tm2.tm_mday) &&
352 (tm1.tm_hour == tm2.tm_hour) &&
353 (tm1.tm_min == tm2.tm_min) &&
354 (tm1.tm_sec == tm2.tm_sec))
356 fprintf(stderr, "TIME ERROR!!\n");
357 fprintf(stderr, "Time1: %d/%d/%d, %d:%02d:%02d\n",
358 tm2.tm_mday, tm2.tm_mon + 1, tm2.tm_year + 1900,
359 tm2.tm_hour, tm2.tm_min, tm2.tm_sec);
360 fprintf(stderr, "Time2: %d/%d/%d, %d:%02d:%02d\n",
361 tm1.tm_mday, tm1.tm_mon + 1, tm1.tm_year + 1900,
362 tm1.tm_hour, tm1.tm_min, tm1.tm_sec);