1 /* crypto/o_time.c -*- mode:C; c-file-style: "eay" -*- */
2 /* Written by Richard Levitte (richard@levitte.org) for the OpenSSL
3 * project 2001.
4 */
5 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
6 * project 2008.
7 */
8 /* ====================================================================
9 * Copyright (c) 2001 The OpenSSL Project. All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 *
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 *
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
21 * distribution.
22 *
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/)"
27 *
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.
32 *
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.
36 *
37 * 6. Redistributions of any form whatsoever must retain the following
38 * acknowledgment:
39 * "This product includes software developed by the OpenSSL Project
40 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
41 *
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 * ====================================================================
55 *
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).
59 *
60 */
61
62 #include <openssl/e_os2.h>
63 #include <string.h>
64 #include <o_time.h>
65
66 #ifdef OPENSSL_SYS_VMS
67 # if __CRTL_VER >= 70000000 && \
68 (defined _POSIX_C_SOURCE || !defined _ANSI_C_SOURCE)
69 # define VMS_GMTIME_OK
70 # endif
71 # ifndef VMS_GMTIME_OK
72 # include <libdtdef.h>
73 # include <lib$routines.h>
74 # include <lnmdef.h>
75 # include <starlet.h>
76 # include <descrip.h>
77 # include <stdlib.h>
78 # endif /* ndef VMS_GMTIME_OK */
79 #endif
80
81 struct tm *OPENSSL_gmtime(const time_t *timer, struct tm *result)
82 {
83 struct tm *ts = NULL;
84
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);
89 ts = result;
90 #elif !defined(OPENSSL_SYS_VMS) || defined(VMS_GMTIME_OK)
91 ts = gmtime(timer);
92 if (ts == NULL)
93 return NULL;
94
95 memcpy(result, ts, sizeof(struct tm));
96 ts = result;
97 #endif
98 #if defined( OPENSSL_SYS_VMS) && !defined( VMS_GMTIME_OK)
99 if (ts == NULL)
100 {
101 static $DESCRIPTOR(tabnam,"LNM$DCL_LOGICAL");
102 static $DESCRIPTOR(lognam,"SYS$TIMEZONE_DIFFERENTIAL");
103 char logvalue[256];
104 unsigned int reslen = 0;
105 struct {
106 short buflen;
107 short code;
108 void *bufaddr;
109 unsigned int *reslen;
110 } itemlist[] = {
111 { 0, LNM$_STRING, 0, 0 },
112 { 0, 0, 0, 0 },
113 };
114 int status;
115 time_t t;
116
117 /* Get the value for SYS$TIMEZONE_DIFFERENTIAL */
118 itemlist[0].buflen = sizeof(logvalue);
119 itemlist[0].bufaddr = logvalue;
120 itemlist[0].reslen = &reslen;
121 status = sys$trnlnm(0, &tabnam, &lognam, 0, itemlist);
122 if (!(status & 1))
123 return NULL;
124 logvalue[reslen] = '\0';
125
126 t = *timer;
127
128 /* The following is extracted from the DEC C header time.h */
129 /*
130 ** Beginning in OpenVMS Version 7.0 mktime, time, ctime, strftime
131 ** have two implementations. One implementation is provided
132 ** for compatibility and deals with time in terms of local time,
133 ** the other __utc_* deals with time in terms of UTC.
134 */
135 /* We use the same conditions as in said time.h to check if we should
136 assume that t contains local time (and should therefore be adjusted)
137 or UTC (and should therefore be left untouched). */
138 #if __CRTL_VER < 70000000 || defined _VMS_V6_SOURCE
139 /* Get the numerical value of the equivalence string */
140 status = atoi(logvalue);
141
142 /* and use it to move time to GMT */
143 t -= status;
144 #endif
145
146 /* then convert the result to the time structure */
147
148 /* Since there was no gmtime_r() to do this stuff for us,
149 we have to do it the hard way. */
150 {
151 /* The VMS epoch is the astronomical Smithsonian date,
152 if I remember correctly, which is November 17, 1858.
153 Furthermore, time is measure in thenths of microseconds
154 and stored in quadwords (64 bit integers). unix_epoch
155 below is January 1st 1970 expressed as a VMS time. The
156 following code was used to get this number:
157
158 #include <stdio.h>
159 #include <stdlib.h>
160 #include <lib$routines.h>
161 #include <starlet.h>
162
163 main()
164 {
165 unsigned long systime[2];
166 unsigned short epoch_values[7] =
167 { 1970, 1, 1, 0, 0, 0, 0 };
168
169 lib$cvt_vectim(epoch_values, systime);
170
171 printf("%u %u", systime[0], systime[1]);
172 }
173 */
174 unsigned long unix_epoch[2] = { 1273708544, 8164711 };
175 unsigned long deltatime[2];
176 unsigned long systime[2];
177 struct vms_vectime
178 {
179 short year, month, day, hour, minute, second,
180 centi_second;
181 } time_values;
182 long operation;
183
184 /* Turn the number of seconds since January 1st 1970 to
185 an internal delta time.
186 Note that lib$cvt_to_internal_time() will assume
187 that t is signed, and will therefore break on 32-bit
188 systems some time in 2038.
189 */
190 operation = LIB$K_DELTA_SECONDS;
191 status = lib$cvt_to_internal_time(&operation,
192 &t, deltatime);
193
194 /* Add the delta time with the Unix epoch and we have
195 the current UTC time in internal format */
196 status = lib$add_times(unix_epoch, deltatime, systime);
197
198 /* Turn the internal time into a time vector */
199 status = sys$numtim(&time_values, systime);
200
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;
208
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;
213
214 operation = LIB$K_DAY_OF_YEAR;
215 status = lib$cvt_from_internal_time(&operation,
216 &result->tm_yday, systime);
217 result->tm_yday--;
218
219 result->tm_isdst = 0; /* There's no way to know... */
220
221 ts = result;
222 }
223 }
224 #endif
225 return ts;
226 }
227
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
230 * problem.
231 */
232
233 #define SECS_PER_DAY (24 * 60 * 60)
234
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
238 int OPENSSL_gmtime_adj(struct tm *tm, int off_day, long offset_sec)
239 {
240 int offset_hms, offset_day;
241 long time_jd;
242 int time_year, time_month, time_day;
243 /* split offset into days and day seconds */
244 offset_day = offset_sec / SECS_PER_DAY;
245 /* Avoid sign issues with % operator */
246 offset_hms = offset_sec - (offset_day * SECS_PER_DAY);
247 offset_day += off_day;
248 /* Add current time seconds to offset */
249 offset_hms += tm->tm_hour * 3600 + tm->tm_min * 60 + tm->tm_sec;
250 /* Adjust day seconds if overflow */
251 if (offset_hms >= SECS_PER_DAY)
252 {
253 offset_day++;
254 offset_hms -= SECS_PER_DAY;
255 }
256 else if (offset_hms < 0)
257 {
258 offset_day--;
259 offset_hms += SECS_PER_DAY;
260 }
261
262 /* Convert date of time structure into a Julian day number.
263 */
264
265 time_year = tm->tm_year + 1900;
266 time_month = tm->tm_mon + 1;
267 time_day = tm->tm_mday;
268
269 time_jd = date_to_julian(time_year, time_month, time_day);
270
271 /* Work out Julian day of new date */
272 time_jd += offset_day;
273
274 if (time_jd < 0)
275 return 0;
276
277 /* Convert Julian day back to date */
278
279 julian_to_date(time_jd, &time_year, &time_month, &time_day);
280
281 if (time_year < 1900 || time_year > 9999)
282 return 0;
283
284 /* Update tm structure */
285
286 tm->tm_year = time_year - 1900;
287 tm->tm_mon = time_month - 1;
288 tm->tm_mday = time_day;
289
290 tm->tm_hour = offset_hms / 3600;
291 tm->tm_min = (offset_hms / 60) % 60;
292 tm->tm_sec = offset_hms % 60;
293
294 return 1;
295
296 }
297
298 /* Convert date to and from julian day
299 * Uses Fliegel & Van Flandern algorithm
300 */
301 static long date_to_julian(int y, int m, int d)
302 {
303 return (1461 * (y + 4800 + (m - 14) / 12)) / 4 +
304 (367 * (m - 2 - 12 * ((m - 14) / 12))) / 12 -
305 (3 * ((y + 4900 + (m - 14) / 12) / 100)) / 4 +
306 d - 32075;
307 }
308
309 static void julian_to_date(long jd, int *y, int *m, int *d)
310 {
311 long L = jd + 68569;
312 long n = (4 * L) / 146097;
313 long i, j;
314
315 L = L - (146097 * n + 3) / 4;
316 i = (4000 * (L + 1)) / 1461001;
317 L = L - (1461 * i) / 4 + 31;
318 j = (80 * L) / 2447;
319 *d = L - (2447 * j) / 80;
320 L = j / 11;
321 *m = j + 2 - (12 * L);
322 *y = 100 * (n - 49) + i + L;
323 }
324
325 #ifdef OPENSSL_TIME_TEST
326
327 #include <stdio.h>
328
329 /* Time checking test code. Check times are identical for a wide range of
330 * offsets. This should be run on a machine with 64 bit time_t or it will
331 * trigger the very errors the routines fix.
332 */
333
334 int main(int argc, char **argv)
335 {
336 long offset;
337 for (offset = 0; offset < 1000000; offset++)
338 {
339 check_time(offset);
340 check_time(-offset);
341 check_time(offset * 1000);
342 check_time(-offset * 1000);
343 }
344 }
345
346 int check_time(long offset)
347 {
348 struct tm tm1, tm2;
349 time_t t1, t2;
350 time(&t1);
351 t2 = t1 + offset;
352 OPENSSL_gmtime(&t2, &tm2);
353 OPENSSL_gmtime(&t1, &tm1);
354 OPENSSL_gmtime_adj(&tm1, 0, offset);
355 if ((tm1.tm_year == tm2.tm_year) &&
356 (tm1.tm_mon == tm2.tm_mon) &&
357 (tm1.tm_mday == tm2.tm_mday) &&
358 (tm1.tm_hour == tm2.tm_hour) &&
359 (tm1.tm_min == tm2.tm_min) &&
360 (tm1.tm_sec == tm2.tm_sec))
361 return 1;
362 fprintf(stderr, "TIME ERROR!!\n");
363 fprintf(stderr, "Time1: %d/%d/%d, %d:%02d:%02d\n",
364 tm2.tm_mday, tm2.tm_mon + 1, tm2.tm_year + 1900,
365 tm2.tm_hour, tm2.tm_min, tm2.tm_sec);
366 fprintf(stderr, "Time2: %d/%d/%d, %d:%02d:%02d\n",
367 tm1.tm_mday, tm1.tm_mon + 1, tm1.tm_year + 1900,
368 tm1.tm_hour, tm1.tm_min, tm1.tm_sec);
369 return 0;
370 }
371
372 #endif