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+/* crypto/o_time.c -*- mode:C; c-file-style: "eay" -*- */
+/* 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 <openssl/e_os2.h>
+#include <string.h>
+#include "o_time.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);
+
+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
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