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o_time.c
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o_time.c
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/* crypto/o_time.c -*- mode:C; c-file-style: "eay" -*- */
/* Written by Richard Levitte ([email protected]) for the OpenSSL
* project 2001.
*/
/* Written by Dr Stephen N Henson ([email protected]) for the OpenSSL
* project 2008.
*/
/* ====================================================================
* Copyright (c) 2001 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* ([email protected]). This product includes software written by Tim
* Hudson ([email protected]).
*
*/
#include <openssl/e_os2.h>
#include <string.h>
#include "crypto.h"
#ifdef OPENSSL_SYS_VMS
# if __CRTL_VER >= 70000000 && \
(defined _POSIX_C_SOURCE || !defined _ANSI_C_SOURCE)
# define VMS_GMTIME_OK
# endif
# ifndef VMS_GMTIME_OK
# include <libdtdef.h>
# include <lib$routines.h>
# include <lnmdef.h>
# include <starlet.h>
# include <descrip.h>
# include <stdlib.h>
# endif /* ndef VMS_GMTIME_OK */
#endif
struct tm *OPENSSL_gmtime(const time_t *timer, struct tm *result)
{
struct tm *ts = NULL;
#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)
/* should return &data, but doesn't on some systems,
so we don't even look at the return value */
gmtime_r(timer,result);
ts = result;
#elif !defined(OPENSSL_SYS_VMS) || defined(VMS_GMTIME_OK)
ts = gmtime(timer);
if (ts == NULL)
return NULL;
memcpy(result, ts, sizeof(struct tm));
ts = result;
#endif
#if defined( OPENSSL_SYS_VMS) && !defined( VMS_GMTIME_OK)
if (ts == NULL)
{
static $DESCRIPTOR(tabnam,"LNM$DCL_LOGICAL");
static $DESCRIPTOR(lognam,"SYS$TIMEZONE_DIFFERENTIAL");
char logvalue[256];
unsigned int reslen = 0;
struct {
short buflen;
short code;
void *bufaddr;
unsigned int *reslen;
} itemlist[] = {
{ 0, LNM$_STRING, 0, 0 },
{ 0, 0, 0, 0 },
};
int status;
time_t t;
/* Get the value for SYS$TIMEZONE_DIFFERENTIAL */
itemlist[0].buflen = sizeof(logvalue);
itemlist[0].bufaddr = logvalue;
itemlist[0].reslen = &reslen;
status = sys$trnlnm(0, &tabnam, &lognam, 0, itemlist);
if (!(status & 1))
return NULL;
logvalue[reslen] = '\0';
t = *timer;
/* The following is extracted from the DEC C header time.h */
/*
** Beginning in OpenVMS Version 7.0 mktime, time, ctime, strftime
** have two implementations. One implementation is provided
** for compatibility and deals with time in terms of local time,
** the other __utc_* deals with time in terms of UTC.
*/
/* We use the same conditions as in said time.h to check if we should
assume that t contains local time (and should therefore be adjusted)
or UTC (and should therefore be left untouched). */
#if __CRTL_VER < 70000000 || defined _VMS_V6_SOURCE
/* Get the numerical value of the equivalence string */
status = atoi(logvalue);
/* and use it to move time to GMT */
t -= status;
#endif
/* then convert the result to the time structure */
/* Since there was no gmtime_r() to do this stuff for us,
we have to do it the hard way. */
{
/* The VMS epoch is the astronomical Smithsonian date,
if I remember correctly, which is November 17, 1858.
Furthermore, time is measure in thenths of microseconds
and stored in quadwords (64 bit integers). unix_epoch
below is January 1st 1970 expressed as a VMS time. The
following code was used to get this number:
#include <stdio.h>
#include <stdlib.h>
#include <lib$routines.h>
#include <starlet.h>
main()
{
unsigned long systime[2];
unsigned short epoch_values[7] =
{ 1970, 1, 1, 0, 0, 0, 0 };
lib$cvt_vectim(epoch_values, systime);
printf("%u %u", systime[0], systime[1]);
}
*/
unsigned long unix_epoch[2] = { 1273708544, 8164711 };
unsigned long deltatime[2];
unsigned long systime[2];
struct vms_vectime
{
short year, month, day, hour, minute, second,
centi_second;
} time_values;
long operation;
/* Turn the number of seconds since January 1st 1970 to
an internal delta time.
Note that lib$cvt_to_internal_time() will assume
that t is signed, and will therefore break on 32-bit
systems some time in 2038.
*/
operation = LIB$K_DELTA_SECONDS;
status = lib$cvt_to_internal_time(&operation,
&t, deltatime);
/* Add the delta time with the Unix epoch and we have
the current UTC time in internal format */
status = lib$add_times(unix_epoch, deltatime, systime);
/* Turn the internal time into a time vector */
status = sys$numtim(&time_values, systime);
/* Fill in the struct tm with the result */
result->tm_sec = time_values.second;
result->tm_min = time_values.minute;
result->tm_hour = time_values.hour;
result->tm_mday = time_values.day;
result->tm_mon = time_values.month - 1;
result->tm_year = time_values.year - 1900;
operation = LIB$K_DAY_OF_WEEK;
status = lib$cvt_from_internal_time(&operation,
&result->tm_wday, systime);
result->tm_wday %= 7;
operation = LIB$K_DAY_OF_YEAR;
status = lib$cvt_from_internal_time(&operation,
&result->tm_yday, systime);
result->tm_yday--;
result->tm_isdst = 0; /* There's no way to know... */
ts = result;
}
}
#endif
return ts;
}
/* Take a tm structure and add an offset to it. This avoids any OS issues
* with restricted date types and overflows which cause the year 2038
* problem.
*/
#define SECS_PER_DAY (24 * 60 * 60)
static long date_to_julian(int y, int m, int d);
static void julian_to_date(long jd, int *y, int *m, int *d);
static int julian_adj(const struct tm *tm, int off_day, long offset_sec,
long *pday, int *psec);
int OPENSSL_gmtime_adj(struct tm *tm, int off_day, long offset_sec)
{
int time_sec, time_year, time_month, time_day;
long time_jd;
/* Convert time and offset into julian day and seconds */
if (!julian_adj(tm, off_day, offset_sec, &time_jd, &time_sec))
return 0;
/* Convert Julian day back to date */
julian_to_date(time_jd, &time_year, &time_month, &time_day);
if (time_year < 1900 || time_year > 9999)
return 0;
/* Update tm structure */
tm->tm_year = time_year - 1900;
tm->tm_mon = time_month - 1;
tm->tm_mday = time_day;
tm->tm_hour = time_sec / 3600;
tm->tm_min = (time_sec / 60) % 60;
tm->tm_sec = time_sec % 60;
return 1;
}
int OPENSSL_gmtime_diff(int *pday, int *psec,
const struct tm *from, const struct tm *to)
{
int from_sec, to_sec, diff_sec;
long from_jd, to_jd, diff_day;
if (!julian_adj(from, 0, 0, &from_jd, &from_sec))
return 0;
if (!julian_adj(to, 0, 0, &to_jd, &to_sec))
return 0;
diff_day = to_jd - from_jd;
diff_sec = to_sec - from_sec;
/* Adjust differences so both positive or both negative */
if (diff_day > 0 && diff_sec < 0)
{
diff_day--;
diff_sec += SECS_PER_DAY;
}
if (diff_day < 0 && diff_sec > 0)
{
diff_day++;
diff_sec -= SECS_PER_DAY;
}
if (pday)
*pday = (int)diff_day;
if (psec)
*psec = diff_sec;
return 1;
}
/* Convert tm structure and offset into julian day and seconds */
static int julian_adj(const struct tm *tm, int off_day, long offset_sec,
long *pday, int *psec)
{
int offset_hms, offset_day;
long time_jd;
int time_year, time_month, time_day;
/* split offset into days and day seconds */
offset_day = offset_sec / SECS_PER_DAY;
/* Avoid sign issues with % operator */
offset_hms = offset_sec - (offset_day * SECS_PER_DAY);
offset_day += off_day;
/* Add current time seconds to offset */
offset_hms += tm->tm_hour * 3600 + tm->tm_min * 60 + tm->tm_sec;
/* Adjust day seconds if overflow */
if (offset_hms >= SECS_PER_DAY)
{
offset_day++;
offset_hms -= SECS_PER_DAY;
}
else if (offset_hms < 0)
{
offset_day--;
offset_hms += SECS_PER_DAY;
}
/* Convert date of time structure into a Julian day number.
*/
time_year = tm->tm_year + 1900;
time_month = tm->tm_mon + 1;
time_day = tm->tm_mday;
time_jd = date_to_julian(time_year, time_month, time_day);
/* Work out Julian day of new date */
time_jd += offset_day;
if (time_jd < 0)
return 0;
*pday = time_jd;
*psec = offset_hms;
return 1;
}
/* Convert date to and from julian day
* Uses Fliegel & Van Flandern algorithm
*/
static long date_to_julian(int y, int m, int d)
{
return (1461 * (y + 4800 + (m - 14) / 12)) / 4 +
(367 * (m - 2 - 12 * ((m - 14) / 12))) / 12 -
(3 * ((y + 4900 + (m - 14) / 12) / 100)) / 4 +
d - 32075;
}
static void julian_to_date(long jd, int *y, int *m, int *d)
{
long L = jd + 68569;
long n = (4 * L) / 146097;
long i, j;
L = L - (146097 * n + 3) / 4;
i = (4000 * (L + 1)) / 1461001;
L = L - (1461 * i) / 4 + 31;
j = (80 * L) / 2447;
*d = L - (2447 * j) / 80;
L = j / 11;
*m = j + 2 - (12 * L);
*y = 100 * (n - 49) + i + L;
}
#ifdef OPENSSL_TIME_TEST
#include <stdio.h>
/* Time checking test code. Check times are identical for a wide range of
* offsets. This should be run on a machine with 64 bit time_t or it will
* trigger the very errors the routines fix.
*/
int main(int argc, char **argv)
{
long offset;
for (offset = 0; offset < 1000000; offset++)
{
check_time(offset);
check_time(-offset);
check_time(offset * 1000);
check_time(-offset * 1000);
}
}
int check_time(long offset)
{
struct tm tm1, tm2, o1;
int off_day, off_sec;
long toffset;
time_t t1, t2;
time(&t1);
t2 = t1 + offset;
OPENSSL_gmtime(&t2, &tm2);
OPENSSL_gmtime(&t1, &tm1);
o1 = tm1;
OPENSSL_gmtime_adj(&tm1, 0, offset);
if ((tm1.tm_year != tm2.tm_year) ||
(tm1.tm_mon != tm2.tm_mon) ||
(tm1.tm_mday != tm2.tm_mday) ||
(tm1.tm_hour != tm2.tm_hour) ||
(tm1.tm_min != tm2.tm_min) ||
(tm1.tm_sec != tm2.tm_sec))
{
fprintf(stderr, "TIME ERROR!!\n");
fprintf(stderr, "Time1: %d/%d/%d, %d:%02d:%02d\n",
tm2.tm_mday, tm2.tm_mon + 1, tm2.tm_year + 1900,
tm2.tm_hour, tm2.tm_min, tm2.tm_sec);
fprintf(stderr, "Time2: %d/%d/%d, %d:%02d:%02d\n",
tm1.tm_mday, tm1.tm_mon + 1, tm1.tm_year + 1900,
tm1.tm_hour, tm1.tm_min, tm1.tm_sec);
return 0;
}
OPENSSL_gmtime_diff(&o1, &tm1, &off_day, &off_sec);
toffset = (long)off_day * SECS_PER_DAY + off_sec;
if (offset != toffset)
{
fprintf(stderr, "TIME OFFSET ERROR!!\n");
fprintf(stderr, "Expected %ld, Got %ld (%d:%d)\n",
offset, toffset, off_day, off_sec);
return 0;
}
return 1;
}
#endif