crypto/o_time.c

   1 /* crypto/o_time.c -*- mode:C; c-file-style: "eay" -*- */
   2 /* Written by Richard Levitte (levitte@stacken.kth.se) for the OpenSSL
   3  * project 2001.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2001 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <openssl/e_os2.h>
  60 #include "o_time.h"
  61
  62 #ifdef OPENSSL_SYS_VMS
  63 # include <libdtdef.h>
  64 # include <lib$routines.h>
  65 # include <lnmdef.h>
  66 # include <starlet.h>
  67 # include <descrip.h>
  68 # include <stdlib.h>
  69 #endif
  70
  71 struct tm *OPENSSL_gmtime(const time_t *timer, struct tm *result)
  72         {
  73         struct tm *ts = NULL;
  74
  75 #if defined(OPENSSL_THREADS) && !defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_SYS_OS2) && !defined(__CYGWIN32__) && (!defined(OPENSSL_SYS_VMS) || defined(gmtime_r))
  76         /* should return &data, but doesn't on some systems,
  77            so we don't even look at the return value */
  78         gmtime_r(timer,result);
  79         ts = result;
  80 #elif !defined(OPENSSL_SYS_VMS)
  81         ts = gmtime(timer);
  82         memcpy(result, ts, sizeof(struct tm));
  83         ts = result;
  84 #endif
  85 #ifdef OPENSSL_SYS_VMS
  86         if (ts == NULL)
  87                 {
  88                 static $DESCRIPTOR(tabnam,"LNM$DCL_LOGICAL");
  89                 static $DESCRIPTOR(lognam,"SYS$TIMEZONE_DIFFERENTIAL");
  90                 char logvalue[256];
  91                 unsigned int reslen = 0;
  92                 struct {
  93                         short buflen;
  94                         short code;
  95                         void *bufaddr;
  96                         unsigned int *reslen;
  97                 } itemlist[] = {
  98                         { 0, LNM$_STRING, 0, 0 },
  99                         { 0, 0, 0, 0 },
 100                 };
 101                 int status;
 102                 time_t t;
 103
 104                 /* Get the value for SYS$TIMEZONE_DIFFERENTIAL */
 105                 itemlist[0].buflen = sizeof(logvalue);
 106                 itemlist[0].bufaddr = logvalue;
 107                 itemlist[0].reslen = &reslen;
 108                 status = sys$trnlnm(0, &tabnam, &lognam, 0, itemlist);
 109                 if (!(status & 1))
 110                         return NULL;
 111                 logvalue[reslen] = '\0';
 112
 113                 /* Get the numerical value of the equivalence string */
 114                 status = atoi(logvalue);
 115
 116                 /* and use it to move time to GMT */
 117                 t = *timer - status;
 118
 119                 /* then convert the result to the time structure */
 120 #ifndef OPENSSL_THREADS
 121                 ts=(struct tm *)localtime(&t);
 122 #else
 123                 /* Since there was no gmtime_r() to do this stuff for us,
 124                    we have to do it the hard way. */
 125                 {
 126                 /* The VMS epoch is the astronomical Smithsonian date,
 127                    if I remember correctly, which is November 17, 1858.
 128                    Furthermore, time is measure in thenths of microseconds
 129                    and stored in quadwords (64 bit integers).  unix_epoch
 130                    below is January 1st 1970 expressed as a VMS time.  The
 131                    following code was used to get this number:
 132
 133                    #include <stdio.h>
 134                    #include <stdlib.h>
 135                    #include <lib$routines.h>
 136                    #include <starlet.h>
 137
 138                    main()
 139                    {
 140                      unsigned long systime[2];
 141                      unsigned short epoch_values[7] =
 142                        { 1970, 1, 1, 0, 0, 0, 0 };
 143
 144                      lib$cvt_vectim(epoch_values, systime);
 145
 146                      printf("%u %u", systime[0], systime[1]);
 147                    }
 148                 */
 149                 unsigned long unix_epoch[2] = { 1273708544, 8164711 };
 150                 unsigned long deltatime[2];
 151                 unsigned long systime[2];
 152                 struct vms_vectime
 153                         {
 154                         short year, month, day, hour, minute, second,
 155                                 centi_second;
 156                         } time_values;
 157                 long operation;
 158
 159                 /* Turn the number of seconds since January 1st 1970 to
 160                    an internal delta time.
 161                    Note that lib$cvt_to_internal_time() will assume
 162                    that t is signed, and will therefore break on 32-bit
 163                    systems some time in 2038.
 164                 */
 165                 operation = LIB$K_DELTA_SECONDS;
 166                 status = lib$cvt_to_internal_time(&operation,
 167                         &t, deltatime);
 168
 169                 /* Add the delta time with the Unix epoch and we have
 170                    the current UTC time in internal format */
 171                 status = lib$add_times(unix_epoch, deltatime, systime);
 172
 173                 /* Turn the internal time into a time vector */
 174                 status = sys$numtim(&time_values, systime);
 175
 176                 /* Fill in the struct tm with the result */
 177                 result->tm_sec = time_values.second;
 178                 result->tm_min = time_values.minute;
 179                 result->tm_hour = time_values.hour;
 180                 result->tm_mday = time_values.day;
 181                 result->tm_mon = time_values.month - 1;
 182                 result->tm_year = time_values.year - 1900;
 183
 184                 operation = LIB$K_DAY_OF_WEEK;
 185                 status = lib$cvt_from_internal_time(&operation,
 186                         &result->tm_wday, systime);
 187                 result->tm_wday %= 7;
 188
 189                 operation = LIB$K_DAY_OF_YEAR;
 190                 status = lib$cvt_from_internal_time(&operation,
 191                         &result->tm_yday, systime);
 192                 result->tm_yday--;
 193
 194                 result->tm_isdst = 0; /* There's no way to know... */
 195
 196                 ts = result;
 197 #endif
 198                 }
 199                 }
 200 #endif
 201         return ts;
 202         }