crypto/openssl-0.9/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 /* ====================================================================
   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 <string.h>
  61 #include "o_time.h"
  62
  63 #ifdef OPENSSL_SYS_VMS
  64 # include <libdtdef.h>
  65 # include <lib$routines.h>
  66 # include <lnmdef.h>
  67 # include <starlet.h>
  68 # include <descrip.h>
  69 # include <stdlib.h>
  70 #endif
  71
  72 struct tm *OPENSSL_gmtime(const time_t *timer, struct tm *result)
  73         {
  74         struct tm *ts = NULL;
  75
  76 #if defined(OPENSSL_THREADS) && !defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_SYS_OS2) && !defined(__CYGWIN32__) && (!defined(OPENSSL_SYS_VMS) || defined(gmtime_r)) && !defined(OPENSSL_SYS_MACOSX) && !defined(OPENSSL_SYS_SUNOS)
  77         /* should return &data, but doesn't on some systems,
  78            so we don't even look at the return value */
  79         gmtime_r(timer,result);
  80         ts = result;
  81 #elif !defined(OPENSSL_SYS_VMS)
  82         ts = gmtime(timer);
  83         if (ts == NULL)
  84                 return NULL;
  85
  86         memcpy(result, ts, sizeof(struct tm));
  87         ts = result;
  88 #endif
  89 #ifdef OPENSSL_SYS_VMS
  90         if (ts == NULL)
  91                 {
  92                 static $DESCRIPTOR(tabnam,"LNM$DCL_LOGICAL");
  93                 static $DESCRIPTOR(lognam,"SYS$TIMEZONE_DIFFERENTIAL");
  94                 char logvalue[256];
  95                 unsigned int reslen = 0;
  96                 struct {
  97                         short buflen;
  98                         short code;
  99                         void *bufaddr;
 100                         unsigned int *reslen;
 101                 } itemlist[] = {
 102                         { 0, LNM$_STRING, 0, 0 },
 103                         { 0, 0, 0, 0 },
 104                 };
 105                 int status;
 106                 time_t t;
 107
 108                 /* Get the value for SYS$TIMEZONE_DIFFERENTIAL */
 109                 itemlist[0].buflen = sizeof(logvalue);
 110                 itemlist[0].bufaddr = logvalue;
 111                 itemlist[0].reslen = &reslen;
 112                 status = sys$trnlnm(0, &tabnam, &lognam, 0, itemlist);
 113                 if (!(status & 1))
 114                         return NULL;
 115                 logvalue[reslen] = '\0';
 116
 117                 t = *timer;
 118
 119 /* The following is extracted from the DEC C header time.h */
 120 /*
 121 **  Beginning in OpenVMS Version 7.0 mktime, time, ctime, strftime
 122 **  have two implementations.  One implementation is provided
 123 **  for compatibility and deals with time in terms of local time,
 124 **  the other __utc_* deals with time in terms of UTC.
 125 */
 126 /* We use the same conditions as in said time.h to check if we should
 127    assume that t contains local time (and should therefore be adjusted)
 128    or UTC (and should therefore be left untouched). */
 129 #if __CRTL_VER < 70000000 || defined _VMS_V6_SOURCE
 130                 /* Get the numerical value of the equivalence string */
 131                 status = atoi(logvalue);
 132
 133                 /* and use it to move time to GMT */
 134                 t -= status;
 135 #endif
 136
 137                 /* then convert the result to the time structure */
 138
 139                 /* Since there was no gmtime_r() to do this stuff for us,
 140                    we have to do it the hard way. */
 141                 {
 142                 /* The VMS epoch is the astronomical Smithsonian date,
 143                    if I remember correctly, which is November 17, 1858.
 144                    Furthermore, time is measure in thenths of microseconds
 145                    and stored in quadwords (64 bit integers).  unix_epoch
 146                    below is January 1st 1970 expressed as a VMS time.  The
 147                    following code was used to get this number:
 148
 149                    #include <stdio.h>
 150                    #include <stdlib.h>
 151                    #include <lib$routines.h>
 152                    #include <starlet.h>
 153
 154                    main()
 155                    {
 156                      unsigned long systime[2];
 157                      unsigned short epoch_values[7] =
 158                        { 1970, 1, 1, 0, 0, 0, 0 };
 159
 160                      lib$cvt_vectim(epoch_values, systime);
 161
 162                      printf("%u %u", systime[0], systime[1]);
 163                    }
 164                 */
 165                 unsigned long unix_epoch[2] = { 1273708544, 8164711 };
 166                 unsigned long deltatime[2];
 167                 unsigned long systime[2];
 168                 struct vms_vectime
 169                         {
 170                         short year, month, day, hour, minute, second,
 171                                 centi_second;
 172                         } time_values;
 173                 long operation;
 174
 175                 /* Turn the number of seconds since January 1st 1970 to
 176                    an internal delta time.
 177                    Note that lib$cvt_to_internal_time() will assume
 178                    that t is signed, and will therefore break on 32-bit
 179                    systems some time in 2038.
 180                 */
 181                 operation = LIB$K_DELTA_SECONDS;
 182                 status = lib$cvt_to_internal_time(&operation,
 183                         &t, deltatime);
 184
 185                 /* Add the delta time with the Unix epoch and we have
 186                    the current UTC time in internal format */
 187                 status = lib$add_times(unix_epoch, deltatime, systime);
 188
 189                 /* Turn the internal time into a time vector */
 190                 status = sys$numtim(&time_values, systime);
 191
 192                 /* Fill in the struct tm with the result */
 193                 result->tm_sec = time_values.second;
 194                 result->tm_min = time_values.minute;
 195                 result->tm_hour = time_values.hour;
 196                 result->tm_mday = time_values.day;
 197                 result->tm_mon = time_values.month - 1;
 198                 result->tm_year = time_values.year - 1900;
 199
 200                 operation = LIB$K_DAY_OF_WEEK;
 201                 status = lib$cvt_from_internal_time(&operation,
 202                         &result->tm_wday, systime);
 203                 result->tm_wday %= 7;
 204
 205                 operation = LIB$K_DAY_OF_YEAR;
 206                 status = lib$cvt_from_internal_time(&operation,
 207                         &result->tm_yday, systime);
 208                 result->tm_yday--;
 209
 210                 result->tm_isdst = 0; /* There's no way to know... */
 211
 212                 ts = result;
 213                 }
 214                 }
 215 #endif
 216         return ts;
 217         }