o_time.c revision 296341
1/* crypto/o_time.c -*- mode:C; c-file-style: "eay" -*- */ 2/* 3 * Written by Richard Levitte (richard@levitte.org) for the OpenSSL project 4 * 2001. 5 */ 6/* 7 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project 8 * 2008. 9 */ 10/* ==================================================================== 11 * Copyright (c) 2001 The OpenSSL Project. All rights reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 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 23 * distribution. 24 * 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/)" 29 * 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. 34 * 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. 38 * 39 * 6. Redistributions of any form whatsoever must retain the following 40 * acknowledgment: 41 * "This product includes software developed by the OpenSSL Project 42 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 43 * 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 * ==================================================================== 57 * 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). 61 * 62 */ 63 64#include <openssl/e_os2.h> 65#include <string.h> 66#include "o_time.h" 67 68#ifdef OPENSSL_SYS_VMS 69# if __CRTL_VER >= 70000000 && \ 70 (defined _POSIX_C_SOURCE || !defined _ANSI_C_SOURCE) 71# define VMS_GMTIME_OK 72# endif 73# ifndef VMS_GMTIME_OK 74# include <libdtdef.h> 75# include <lib$routines.h> 76# include <lnmdef.h> 77# include <starlet.h> 78# include <descrip.h> 79# include <stdlib.h> 80# endif /* ndef VMS_GMTIME_OK */ 81#endif 82 83struct tm *OPENSSL_gmtime(const time_t *timer, struct tm *result) 84{ 85 struct tm *ts = NULL; 86 87#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) 88 /* 89 * should return &data, but doesn't on some systems, so we don't even 90 * look at the return value 91 */ 92 gmtime_r(timer, result); 93 ts = result; 94#elif !defined(OPENSSL_SYS_VMS) || defined(VMS_GMTIME_OK) 95 ts = gmtime(timer); 96 if (ts == NULL) 97 return NULL; 98 99 memcpy(result, ts, sizeof(struct tm)); 100 ts = result; 101#endif 102#if defined( OPENSSL_SYS_VMS) && !defined( VMS_GMTIME_OK) 103 if (ts == NULL) { 104 static $DESCRIPTOR(tabnam, "LNM$DCL_LOGICAL"); 105 static $DESCRIPTOR(lognam, "SYS$TIMEZONE_DIFFERENTIAL"); 106 char logvalue[256]; 107 unsigned int reslen = 0; 108 struct { 109 short buflen; 110 short code; 111 void *bufaddr; 112 unsigned int *reslen; 113 } itemlist[] = { 114 { 115 0, LNM$_STRING, 0, 0 116 }, 117 { 118 0, 0, 0, 0 119 }, 120 }; 121 int status; 122 time_t t; 123 124 /* Get the value for SYS$TIMEZONE_DIFFERENTIAL */ 125 itemlist[0].buflen = sizeof(logvalue); 126 itemlist[0].bufaddr = logvalue; 127 itemlist[0].reslen = &reslen; 128 status = sys$trnlnm(0, &tabnam, &lognam, 0, itemlist); 129 if (!(status & 1)) 130 return NULL; 131 logvalue[reslen] = '\0'; 132 133 t = *timer; 134 135/* The following is extracted from the DEC C header time.h */ 136 /* 137 ** Beginning in OpenVMS Version 7.0 mktime, time, ctime, strftime 138 ** have two implementations. One implementation is provided 139 ** for compatibility and deals with time in terms of local time, 140 ** the other __utc_* deals with time in terms of UTC. 141 */ 142 /* 143 * We use the same conditions as in said time.h to check if we should 144 * assume that t contains local time (and should therefore be 145 * adjusted) or UTC (and should therefore be left untouched). 146 */ 147# if __CRTL_VER < 70000000 || defined _VMS_V6_SOURCE 148 /* Get the numerical value of the equivalence string */ 149 status = atoi(logvalue); 150 151 /* and use it to move time to GMT */ 152 t -= status; 153# endif 154 155 /* then convert the result to the time structure */ 156 157 /* 158 * Since there was no gmtime_r() to do this stuff for us, we have to 159 * do it the hard way. 160 */ 161 { 162 /*- 163 * The VMS epoch is the astronomical Smithsonian date, 164 if I remember correctly, which is November 17, 1858. 165 Furthermore, time is measure in thenths of microseconds 166 and stored in quadwords (64 bit integers). unix_epoch 167 below is January 1st 1970 expressed as a VMS time. The 168 following code was used to get this number: 169 170 #include <stdio.h> 171 #include <stdlib.h> 172 #include <lib$routines.h> 173 #include <starlet.h> 174 175 main() 176 { 177 unsigned long systime[2]; 178 unsigned short epoch_values[7] = 179 { 1970, 1, 1, 0, 0, 0, 0 }; 180 181 lib$cvt_vectim(epoch_values, systime); 182 183 printf("%u %u", systime[0], systime[1]); 184 } 185 */ 186 unsigned long unix_epoch[2] = { 1273708544, 8164711 }; 187 unsigned long deltatime[2]; 188 unsigned long systime[2]; 189 struct vms_vectime { 190 short year, month, day, hour, minute, second, centi_second; 191 } time_values; 192 long operation; 193 194 /* 195 * Turn the number of seconds since January 1st 1970 to an 196 * internal delta time. Note that lib$cvt_to_internal_time() will 197 * assume that t is signed, and will therefore break on 32-bit 198 * systems some time in 2038. 199 */ 200 operation = LIB$K_DELTA_SECONDS; 201 status = lib$cvt_to_internal_time(&operation, &t, deltatime); 202 203 /* 204 * Add the delta time with the Unix epoch and we have the current 205 * UTC time in internal format 206 */ 207 status = lib$add_times(unix_epoch, deltatime, systime); 208 209 /* Turn the internal time into a time vector */ 210 status = sys$numtim(&time_values, systime); 211 212 /* 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; 219 220 operation = LIB$K_DAY_OF_WEEK; 221 status = lib$cvt_from_internal_time(&operation, 222 &result->tm_wday, systime); 223 result->tm_wday %= 7; 224 225 operation = LIB$K_DAY_OF_YEAR; 226 status = lib$cvt_from_internal_time(&operation, 227 &result->tm_yday, systime); 228 result->tm_yday--; 229 230 result->tm_isdst = 0; /* There's no way to know... */ 231 232 ts = result; 233 } 234 } 235#endif 236 return ts; 237} 238 239/* 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 242 * problem. 243 */ 244 245#define SECS_PER_DAY (24 * 60 * 60) 246 247static long date_to_julian(int y, int m, int d); 248static void julian_to_date(long jd, int *y, int *m, int *d); 249 250int OPENSSL_gmtime_adj(struct tm *tm, int off_day, long offset_sec) 251{ 252 int offset_hms, offset_day; 253 long time_jd; 254 int time_year, time_month, time_day; 255 /* split offset into days and day seconds */ 256 offset_day = offset_sec / SECS_PER_DAY; 257 /* Avoid sign issues with % operator */ 258 offset_hms = offset_sec - (offset_day * SECS_PER_DAY); 259 offset_day += off_day; 260 /* Add current time seconds to offset */ 261 offset_hms += tm->tm_hour * 3600 + tm->tm_min * 60 + tm->tm_sec; 262 /* Adjust day seconds if overflow */ 263 if (offset_hms >= SECS_PER_DAY) { 264 offset_day++; 265 offset_hms -= SECS_PER_DAY; 266 } else if (offset_hms < 0) { 267 offset_day--; 268 offset_hms += SECS_PER_DAY; 269 } 270 271 /* 272 * Convert date of time structure into a Julian day number. 273 */ 274 275 time_year = tm->tm_year + 1900; 276 time_month = tm->tm_mon + 1; 277 time_day = tm->tm_mday; 278 279 time_jd = date_to_julian(time_year, time_month, time_day); 280 281 /* Work out Julian day of new date */ 282 time_jd += offset_day; 283 284 if (time_jd < 0) 285 return 0; 286 287 /* Convert Julian day back to date */ 288 289 julian_to_date(time_jd, &time_year, &time_month, &time_day); 290 291 if (time_year < 1900 || time_year > 9999) 292 return 0; 293 294 /* Update tm structure */ 295 296 tm->tm_year = time_year - 1900; 297 tm->tm_mon = time_month - 1; 298 tm->tm_mday = time_day; 299 300 tm->tm_hour = offset_hms / 3600; 301 tm->tm_min = (offset_hms / 60) % 60; 302 tm->tm_sec = offset_hms % 60; 303 304 return 1; 305 306} 307 308/* 309 * Convert date to and from julian day Uses Fliegel & Van Flandern algorithm 310 */ 311static long date_to_julian(int y, int m, int d) 312{ 313 return (1461 * (y + 4800 + (m - 14) / 12)) / 4 + 314 (367 * (m - 2 - 12 * ((m - 14) / 12))) / 12 - 315 (3 * ((y + 4900 + (m - 14) / 12) / 100)) / 4 + d - 32075; 316} 317 318static void julian_to_date(long jd, int *y, int *m, int *d) 319{ 320 long L = jd + 68569; 321 long n = (4 * L) / 146097; 322 long i, j; 323 324 L = L - (146097 * n + 3) / 4; 325 i = (4000 * (L + 1)) / 1461001; 326 L = L - (1461 * i) / 4 + 31; 327 j = (80 * L) / 2447; 328 *d = L - (2447 * j) / 80; 329 L = j / 11; 330 *m = j + 2 - (12 * L); 331 *y = 100 * (n - 49) + i + L; 332} 333 334#ifdef OPENSSL_TIME_TEST 335 336# include <stdio.h> 337 338/* 339 * Time checking test code. Check times are identical for a wide range of 340 * offsets. This should be run on a machine with 64 bit time_t or it will 341 * trigger the very errors the routines fix. 342 */ 343 344int main(int argc, char **argv) 345{ 346 long offset; 347 for (offset = 0; offset < 1000000; offset++) { 348 check_time(offset); 349 check_time(-offset); 350 check_time(offset * 1000); 351 check_time(-offset * 1000); 352 } 353} 354 355int check_time(long offset) 356{ 357 struct tm tm1, tm2; 358 time_t t1, t2; 359 time(&t1); 360 t2 = t1 + offset; 361 OPENSSL_gmtime(&t2, &tm2); 362 OPENSSL_gmtime(&t1, &tm1); 363 OPENSSL_gmtime_adj(&tm1, 0, offset); 364 if ((tm1.tm_year == tm2.tm_year) && 365 (tm1.tm_mon == tm2.tm_mon) && 366 (tm1.tm_mday == tm2.tm_mday) && 367 (tm1.tm_hour == tm2.tm_hour) && 368 (tm1.tm_min == tm2.tm_min) && (tm1.tm_sec == tm2.tm_sec)) 369 return 1; 370 fprintf(stderr, "TIME ERROR!!\n"); 371 fprintf(stderr, "Time1: %d/%d/%d, %d:%02d:%02d\n", 372 tm2.tm_mday, tm2.tm_mon + 1, tm2.tm_year + 1900, 373 tm2.tm_hour, tm2.tm_min, tm2.tm_sec); 374 fprintf(stderr, "Time2: %d/%d/%d, %d:%02d:%02d\n", 375 tm1.tm_mday, tm1.tm_mon + 1, tm1.tm_year + 1900, 376 tm1.tm_hour, tm1.tm_min, tm1.tm_sec); 377 return 0; 378} 379 380#endif 381