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>
66 #include <openssl/crypto.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)
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);
249 static int julian_adj(const struct tm *tm, int off_day, long offset_sec,
250 long *pday, int *psec);
252 int OPENSSL_gmtime_adj(struct tm *tm, int off_day, long offset_sec)
254 int time_sec, time_year, time_month, time_day;
257 /* Convert time and offset into julian day and seconds */
258 if (!julian_adj(tm, off_day, offset_sec, &time_jd, &time_sec))
261 /* Convert Julian day back to date */
263 julian_to_date(time_jd, &time_year, &time_month, &time_day);
265 if (time_year < 1900 || time_year > 9999)
268 /* Update tm structure */
270 tm->tm_year = time_year - 1900;
271 tm->tm_mon = time_month - 1;
272 tm->tm_mday = time_day;
274 tm->tm_hour = time_sec / 3600;
275 tm->tm_min = (time_sec / 60) % 60;
276 tm->tm_sec = time_sec % 60;
282 int OPENSSL_gmtime_diff(int *pday, int *psec,
283 const struct tm *from, const struct tm *to)
285 int from_sec, to_sec, diff_sec;
286 long from_jd, to_jd, diff_day;
287 if (!julian_adj(from, 0, 0, &from_jd, &from_sec))
289 if (!julian_adj(to, 0, 0, &to_jd, &to_sec))
291 diff_day = to_jd - from_jd;
292 diff_sec = to_sec - from_sec;
293 /* Adjust differences so both positive or both negative */
294 if (diff_day > 0 && diff_sec < 0) {
296 diff_sec += SECS_PER_DAY;
298 if (diff_day < 0 && diff_sec > 0) {
300 diff_sec -= SECS_PER_DAY;
304 *pday = (int)diff_day;
312 /* Convert tm structure and offset into julian day and seconds */
313 static int julian_adj(const struct tm *tm, int off_day, long offset_sec,
314 long *pday, int *psec)
316 int offset_hms, offset_day;
318 int time_year, time_month, time_day;
319 /* split offset into days and day seconds */
320 offset_day = offset_sec / SECS_PER_DAY;
321 /* Avoid sign issues with % operator */
322 offset_hms = offset_sec - (offset_day * SECS_PER_DAY);
323 offset_day += off_day;
324 /* Add current time seconds to offset */
325 offset_hms += tm->tm_hour * 3600 + tm->tm_min * 60 + tm->tm_sec;
326 /* Adjust day seconds if overflow */
327 if (offset_hms >= SECS_PER_DAY) {
329 offset_hms -= SECS_PER_DAY;
330 } else if (offset_hms < 0) {
332 offset_hms += SECS_PER_DAY;
336 * Convert date of time structure into a Julian day number.
339 time_year = tm->tm_year + 1900;
340 time_month = tm->tm_mon + 1;
341 time_day = tm->tm_mday;
343 time_jd = date_to_julian(time_year, time_month, time_day);
345 /* Work out Julian day of new date */
346 time_jd += offset_day;
357 * Convert date to and from julian day Uses Fliegel & Van Flandern algorithm
359 static long date_to_julian(int y, int m, int d)
361 return (1461 * (y + 4800 + (m - 14) / 12)) / 4 +
362 (367 * (m - 2 - 12 * ((m - 14) / 12))) / 12 -
363 (3 * ((y + 4900 + (m - 14) / 12) / 100)) / 4 + d - 32075;
366 static void julian_to_date(long jd, int *y, int *m, int *d)
369 long n = (4 * L) / 146097;
372 L = L - (146097 * n + 3) / 4;
373 i = (4000 * (L + 1)) / 1461001;
374 L = L - (1461 * i) / 4 + 31;
376 *d = L - (2447 * j) / 80;
378 *m = j + 2 - (12 * L);
379 *y = 100 * (n - 49) + i + L;