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/* $OpenBSD: a_time.c,v 1.33 2021/12/25 07:48:09 jsing Exp $ */
/* ====================================================================
* Copyright (c) 1999 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).
*
*/
/* This is an implementation of the ASN1 Time structure which is:
* Time ::= CHOICE {
* utcTime UTCTime,
* generalTime GeneralizedTime }
* written by Steve Henson.
*/
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <openssl/asn1t.h>
#include <openssl/err.h>
#include "o_time.h"
#include "asn1_locl.h"
const ASN1_ITEM ASN1_TIME_it = {
.itype = ASN1_ITYPE_MSTRING,
.utype = B_ASN1_TIME,
.templates = NULL,
.tcount = 0,
.funcs = NULL,
.size = sizeof(ASN1_STRING),
.sname = "ASN1_TIME",
};
ASN1_TIME *
ASN1_TIME_new(void)
{
return (ASN1_TIME *)ASN1_item_new(&ASN1_TIME_it);
}
void
ASN1_TIME_free(ASN1_TIME *a)
{
ASN1_item_free((ASN1_VALUE *)a, &ASN1_TIME_it);
}
/* Public API in OpenSSL. Kept internal for now. */
static int
ASN1_TIME_to_tm(const ASN1_TIME *s, struct tm *tm)
{
time_t now;
if (s != NULL)
return ASN1_time_parse(s->data, s->length, tm, 0) != -1;
time(&now);
memset(tm, 0, sizeof(*tm));
return gmtime_r(&now, tm) != NULL;
}
int
ASN1_TIME_diff(int *pday, int *psec, const ASN1_TIME *from, const ASN1_TIME *to)
{
struct tm tm_from, tm_to;
if (!ASN1_TIME_to_tm(from, &tm_from))
return 0;
if (!ASN1_TIME_to_tm(to, &tm_to))
return 0;
return OPENSSL_gmtime_diff(pday, psec, &tm_from, &tm_to);
}
ASN1_TIME *
d2i_ASN1_TIME(ASN1_TIME **a, const unsigned char **in, long len)
{
return (ASN1_TIME *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
&ASN1_TIME_it);
}
int
i2d_ASN1_TIME(ASN1_TIME *a, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)a, out, &ASN1_TIME_it);
}
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