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