2 * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include <openssl/e_os2.h>
12 #include <openssl/crypto.h>
14 #ifdef OPENSSL_SYS_VMS
15 # if __CRTL_VER >= 70000000 && \
16 (defined _POSIX_C_SOURCE || !defined _ANSI_C_SOURCE)
17 # define VMS_GMTIME_OK
19 # ifndef VMS_GMTIME_OK
20 # include <libdtdef.h>
21 # include <lib$routines.h>
26 # endif /* ndef VMS_GMTIME_OK */
30 * Needed to pick up the correct definitions and declarations in some of the
31 * DEC C Header Files (*.H).
33 # define __NEW_STARLET 1
35 # if (defined(__alpha) || defined(__ia64))
40 typedef struct _ile3 { /* Copied from ILEDEF.H for Alpha */
41 # pragma __nomember_alignment
42 unsigned short int ile3$w_length; /* Length of buffer in bytes */
43 unsigned short int ile3$w_code; /* Item code value */
44 void *ile3$ps_bufaddr; /* Buffer address */
45 unsigned short int *ile3$ps_retlen_addr; /* Address of word for returned length */
47 # endif /* alpha || ia64 */
48 #endif /* OPENSSL_SYS_VMS */
50 struct tm *OPENSSL_gmtime(const time_t *timer, struct tm *result)
54 #if defined(OPENSSL_THREADS) && !defined(OPENSSL_SYS_WIN32) && (!defined(OPENSSL_SYS_VMS) || defined(gmtime_r)) && !defined(OPENSSL_SYS_MACOSX)
55 if (gmtime_r(timer, result) == NULL)
58 #elif !defined(OPENSSL_SYS_VMS) || defined(VMS_GMTIME_OK)
63 memcpy(result, ts, sizeof(struct tm));
66 #if defined( OPENSSL_SYS_VMS) && !defined( VMS_GMTIME_OK)
68 static $DESCRIPTOR(tabnam, "LNM$DCL_LOGICAL");
69 static $DESCRIPTOR(lognam, "SYS$TIMEZONE_DIFFERENTIAL");
71 unsigned int reslen = 0;
72 # if __INITIAL_POINTER_SIZE == 64
73 ILEB_64 itemlist[2], *pitem;
75 ILE3 itemlist[2], *pitem;
82 * Setup an itemlist for the call to $TRNLNM - Translate Logical Name.
86 # if __INITIAL_POINTER_SIZE == 64
87 pitem->ileb_64$w_mbo = 1;
88 pitem->ileb_64$w_code = LNM$_STRING;
89 pitem->ileb_64$l_mbmo = -1;
90 pitem->ileb_64$q_length = sizeof (logvalue);
91 pitem->ileb_64$pq_bufaddr = logvalue;
92 pitem->ileb_64$pq_retlen_addr = (unsigned __int64 *) &reslen;
94 /* Last item of the item list is null terminated */
95 pitem->ileb_64$q_length = pitem->ileb_64$w_code = 0;
97 pitem->ile3$w_length = sizeof (logvalue);
98 pitem->ile3$w_code = LNM$_STRING;
99 pitem->ile3$ps_bufaddr = logvalue;
100 pitem->ile3$ps_retlen_addr = (unsigned short int *) &reslen;
102 /* Last item of the item list is null terminated */
103 pitem->ile3$w_length = pitem->ile3$w_code = 0;
107 /* Get the value for SYS$TIMEZONE_DIFFERENTIAL */
108 status = sys$trnlnm(0, &tabnam, &lognam, 0, itemlist);
111 logvalue[reslen] = '\0';
115 /* The following is extracted from the DEC C header time.h */
117 ** Beginning in OpenVMS Version 7.0 mktime, time, ctime, strftime
118 ** have two implementations. One implementation is provided
119 ** for compatibility and deals with time in terms of local time,
120 ** the other __utc_* deals with time in terms of UTC.
123 * We use the same conditions as in said time.h to check if we should
124 * assume that t contains local time (and should therefore be
125 * adjusted) or UTC (and should therefore be left untouched).
127 # if __CRTL_VER < 70000000 || defined _VMS_V6_SOURCE
128 /* Get the numerical value of the equivalence string */
129 status = atoi(logvalue);
131 /* and use it to move time to GMT */
135 /* then convert the result to the time structure */
138 * Since there was no gmtime_r() to do this stuff for us, we have to
139 * do it the hard way.
143 * The VMS epoch is the astronomical Smithsonian date,
144 if I remember correctly, which is November 17, 1858.
145 Furthermore, time is measure in tenths of microseconds
146 and stored in quadwords (64 bit integers). unix_epoch
147 below is January 1st 1970 expressed as a VMS time. The
148 following code was used to get this number:
152 #include <lib$routines.h>
157 unsigned long systime[2];
158 unsigned short epoch_values[7] =
159 { 1970, 1, 1, 0, 0, 0, 0 };
161 lib$cvt_vectim(epoch_values, systime);
163 printf("%u %u", systime[0], systime[1]);
166 unsigned long unix_epoch[2] = { 1273708544, 8164711 };
167 unsigned long deltatime[2];
168 unsigned long systime[2];
170 short year, month, day, hour, minute, second, centi_second;
175 * Turn the number of seconds since January 1st 1970 to an
176 * internal delta time. Note that lib$cvt_to_internal_time() will
177 * assume that t is signed, and will therefore break on 32-bit
178 * systems some time in 2038.
180 operation = LIB$K_DELTA_SECONDS;
181 status = lib$cvt_to_internal_time(&operation, &t, deltatime);
184 * Add the delta time with the Unix epoch and we have the current
185 * UTC time in internal format
187 status = lib$add_times(unix_epoch, deltatime, systime);
189 /* Turn the internal time into a time vector */
190 status = sys$numtim(&time_values, systime);
192 /* Fill in the struct tm with the result */
193 result->tm_sec = time_values.second;
194 result->tm_min = time_values.minute;
195 result->tm_hour = time_values.hour;
196 result->tm_mday = time_values.day;
197 result->tm_mon = time_values.month - 1;
198 result->tm_year = time_values.year - 1900;
200 operation = LIB$K_DAY_OF_WEEK;
201 status = lib$cvt_from_internal_time(&operation,
202 &result->tm_wday, systime);
203 result->tm_wday %= 7;
205 operation = LIB$K_DAY_OF_YEAR;
206 status = lib$cvt_from_internal_time(&operation,
207 &result->tm_yday, systime);
210 result->tm_isdst = 0; /* There's no way to know... */
220 * Take a tm structure and add an offset to it. This avoids any OS issues
221 * with restricted date types and overflows which cause the year 2038
225 #define SECS_PER_DAY (24 * 60 * 60)
227 static long date_to_julian(int y, int m, int d);
228 static void julian_to_date(long jd, int *y, int *m, int *d);
229 static int julian_adj(const struct tm *tm, int off_day, long offset_sec,
230 long *pday, int *psec);
232 int OPENSSL_gmtime_adj(struct tm *tm, int off_day, long offset_sec)
234 int time_sec, time_year, time_month, time_day;
237 /* Convert time and offset into Julian day and seconds */
238 if (!julian_adj(tm, off_day, offset_sec, &time_jd, &time_sec))
241 /* Convert Julian day back to date */
243 julian_to_date(time_jd, &time_year, &time_month, &time_day);
245 if (time_year < 1900 || time_year > 9999)
248 /* Update tm structure */
250 tm->tm_year = time_year - 1900;
251 tm->tm_mon = time_month - 1;
252 tm->tm_mday = time_day;
254 tm->tm_hour = time_sec / 3600;
255 tm->tm_min = (time_sec / 60) % 60;
256 tm->tm_sec = time_sec % 60;
262 int OPENSSL_gmtime_diff(int *pday, int *psec,
263 const struct tm *from, const struct tm *to)
265 int from_sec, to_sec, diff_sec;
266 long from_jd, to_jd, diff_day;
267 if (!julian_adj(from, 0, 0, &from_jd, &from_sec))
269 if (!julian_adj(to, 0, 0, &to_jd, &to_sec))
271 diff_day = to_jd - from_jd;
272 diff_sec = to_sec - from_sec;
273 /* Adjust differences so both positive or both negative */
274 if (diff_day > 0 && diff_sec < 0) {
276 diff_sec += SECS_PER_DAY;
278 if (diff_day < 0 && diff_sec > 0) {
280 diff_sec -= SECS_PER_DAY;
284 *pday = (int)diff_day;
292 /* Convert tm structure and offset into julian day and seconds */
293 static int julian_adj(const struct tm *tm, int off_day, long offset_sec,
294 long *pday, int *psec)
296 int offset_hms, offset_day;
298 int time_year, time_month, time_day;
299 /* split offset into days and day seconds */
300 offset_day = offset_sec / SECS_PER_DAY;
301 /* Avoid sign issues with % operator */
302 offset_hms = offset_sec - (offset_day * SECS_PER_DAY);
303 offset_day += off_day;
304 /* Add current time seconds to offset */
305 offset_hms += tm->tm_hour * 3600 + tm->tm_min * 60 + tm->tm_sec;
306 /* Adjust day seconds if overflow */
307 if (offset_hms >= SECS_PER_DAY) {
309 offset_hms -= SECS_PER_DAY;
310 } else if (offset_hms < 0) {
312 offset_hms += SECS_PER_DAY;
316 * Convert date of time structure into a Julian day number.
319 time_year = tm->tm_year + 1900;
320 time_month = tm->tm_mon + 1;
321 time_day = tm->tm_mday;
323 time_jd = date_to_julian(time_year, time_month, time_day);
325 /* Work out Julian day of new date */
326 time_jd += offset_day;
337 * Convert date to and from julian day Uses Fliegel & Van Flandern algorithm
339 static long date_to_julian(int y, int m, int d)
341 return (1461 * (y + 4800 + (m - 14) / 12)) / 4 +
342 (367 * (m - 2 - 12 * ((m - 14) / 12))) / 12 -
343 (3 * ((y + 4900 + (m - 14) / 12) / 100)) / 4 + d - 32075;
346 static void julian_to_date(long jd, int *y, int *m, int *d)
349 long n = (4 * L) / 146097;
352 L = L - (146097 * n + 3) / 4;
353 i = (4000 * (L + 1)) / 1461001;
354 L = L - (1461 * i) / 4 + 31;
356 *d = L - (2447 * j) / 80;
358 *m = j + 2 - (12 * L);
359 *y = 100 * (n - 49) + i + L;