forked from etc/pineapple-src
242 lines
7 KiB
C
Executable file
242 lines
7 KiB
C
Executable file
/* $OpenBSD: o_time.c,v 1.16 2021/10/27 09:50:56 beck Exp $ */
|
|
/* Written by Richard Levitte (richard@levitte.org) for the OpenSSL
|
|
* project 2001.
|
|
*/
|
|
/* Written by Dr Stephen N Henson (steve@openssl.org) 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
|
|
* licensing@OpenSSL.org.
|
|
*
|
|
* 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
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
* Hudson (tjh@cryptsoft.com).
|
|
*
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
#include "o_time.h"
|
|
|
|
/* 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 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;
|
|
|
|
/* 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 = offset_hms / 3600;
|
|
tm->tm_min = (offset_hms / 60) % 60;
|
|
tm->tm_sec = offset_hms % 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 time_year, time_month, time_day;
|
|
long offset_day, time_jd;
|
|
int offset_hms;
|
|
|
|
/* 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;
|
|
}
|