/* 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.
*
{
struct tm *ts = NULL;
-#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)
+#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)
ts = gmtime(timer);
- if (ts != NULL)
- memcpy(result, ts, sizeof(struct tm));
+ if (ts == NULL)
+ return NULL;
+
+ memcpy(result, ts, sizeof(struct tm));
ts = result;
#endif
#ifdef OPENSSL_SYS_VMS
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 = *timer - status;
+ t -= status;
+#endif
/* then convert the result to the time structure */
-#ifndef OPENSSL_THREADS
- ts=(struct tm *)localtime(&t);
-#else
+
/* Since there was no gmtime_r() to do this stuff for us,
we have to do it the hard way. */
{
result->tm_isdst = 0; /* There's no way to know... */
ts = result;
-#endif
}
}
#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);
+
+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;
+
+}
+
+/* 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;
+ time_t t1, t2;
+ time(&t1);
+ t2 = t1 + offset;
+ OPENSSL_gmtime(&t2, &tm2);
+ OPENSSL_gmtime(&t1, &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))
+ return 1;
+ 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;
+ }
+
+#endif
projects / openssl.git / blobdiff