Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 |