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 373