release/src/router/openssl/crypto/o_time.c

   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