/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* 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 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 acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS 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 AUTHOR OR 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.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.] */
#include <openssl/asn1.h>
#include <string.h>
#include <time.h>
#include <openssl/err.h>
#include <openssl/mem.h>
#include "asn1_locl.h"
int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d)
{
static const int min[8] = { 0, 1, 1, 0, 0, 0, 0, 0 };
static const int max[8] = { 99, 12, 31, 23, 59, 59, 12, 59 };
char *a;
int n, i, l, o;
if (d->type != V_ASN1_UTCTIME)
return (0);
l = d->length;
a = (char *)d->data;
o = 0;
if (l < 11)
goto err;
for (i = 0; i < 6; i++) {
if ((i == 5) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
i++;
if (tm)
tm->tm_sec = 0;
break;
}
if ((a[o] < '0') || (a[o] > '9'))
goto err;
n = a[o] - '0';
if (++o > l)
goto err;
if ((a[o] < '0') || (a[o] > '9'))
goto err;
n = (n * 10) + a[o] - '0';
if (++o > l)
goto err;
if ((n < min[i]) || (n > max[i]))
goto err;
if (tm) {
switch (i) {
case 0:
tm->tm_year = n < 50 ? n + 100 : n;
break;
case 1:
tm->tm_mon = n - 1;
break;
case 2:
tm->tm_mday = n;
break;
case 3:
tm->tm_hour = n;
break;
case 4:
tm->tm_min = n;
break;
case 5:
tm->tm_sec = n;
break;
}
}
}
if (a[o] == 'Z')
o++;
else if ((a[o] == '+') || (a[o] == '-')) {
int offsign = a[o] == '-' ? -1 : 1, offset = 0;
o++;
if (o + 4 > l)
goto err;
for (i = 6; i < 8; i++) {
if ((a[o] < '0') || (a[o] > '9'))
goto err;
n = a[o] - '0';
o++;
if ((a[o] < '0') || (a[o] > '9'))
goto err;
n = (n * 10) + a[o] - '0';
if ((n < min[i]) || (n > max[i]))
goto err;
if (tm) {
if (i == 6)
offset = n * 3600;
else if (i == 7)
offset += n * 60;
}
o++;
}
if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
return 0;
}
return o == l;
err:
return 0;
}
int ASN1_UTCTIME_check(const ASN1_UTCTIME *d)
{
return asn1_utctime_to_tm(NULL, d);
}
int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str)
{
ASN1_UTCTIME t;
t.type = V_ASN1_UTCTIME;
t.length = strlen(str);
t.data = (unsigned char *)str;
if (ASN1_UTCTIME_check(&t)) {
if (s != NULL) {
if (!ASN1_STRING_set((ASN1_STRING *)s,
(unsigned char *)str, t.length))
return 0;
s->type = V_ASN1_UTCTIME;
}
return (1);
} else
return (0);
}
ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
{
return ASN1_UTCTIME_adj(s, t, 0, 0);
}
ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t,
int offset_day, long offset_sec)
{
char *p;
struct tm *ts;
struct tm data;
size_t len = 20;
int free_s = 0;
if (s == NULL) {
free_s = 1;
s = M_ASN1_UTCTIME_new();
}
if (s == NULL)
goto err;
ts = OPENSSL_gmtime(&t, &data);
if (ts == NULL)
goto err;
if (offset_day || offset_sec) {
if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
goto err;
}
if ((ts->tm_year < 50) || (ts->tm_year >= 150))
goto err;
p = (char *)s->data;
if ((p == NULL) || ((size_t)s->length < len)) {
p = OPENSSL_malloc(len);
if (p == NULL) {
OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
goto err;
}
if (s->data != NULL)
OPENSSL_free(s->data);
s->data = (unsigned char *)p;
}
BIO_snprintf(p, len, "%02d%02d%02d%02d%02d%02dZ", ts->tm_year % 100,
ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
ts->tm_sec);
s->length = strlen(p);
s->type = V_ASN1_UTCTIME;
return (s);
err:
if (free_s && s)
M_ASN1_UTCTIME_free(s);
return NULL;
}
int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
{
struct tm stm, ttm;
int day, sec;
if (!asn1_utctime_to_tm(&stm, s))
return -2;
if (!OPENSSL_gmtime(&t, &ttm))
return -2;
if (!OPENSSL_gmtime_diff(&day, &sec, &ttm, &stm))
return -2;
if (day > 0)
return 1;
if (day < 0)
return -1;
if (sec > 0)
return 1;
if (sec < 0)
return -1;
return 0;
}
#if 0
time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s)
{
struct tm tm;
int offset;
OPENSSL_memset(&tm, '\0', sizeof tm);
# define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
tm.tm_year = g2(s->data);
if (tm.tm_year < 50)
tm.tm_year += 100;
tm.tm_mon = g2(s->data + 2) - 1;
tm.tm_mday = g2(s->data + 4);
tm.tm_hour = g2(s->data + 6);
tm.tm_min = g2(s->data + 8);
tm.tm_sec = g2(s->data + 10);
if (s->data[12] == 'Z')
offset = 0;
else {
offset = g2(s->data + 13) * 60 + g2(s->data + 15);
if (s->data[12] == '-')
offset = -offset;
}
# undef g2
return mktime(&tm) - offset * 60; /* FIXME: mktime assumes the current
* timezone instead of UTC, and unless
* we rewrite OpenSSL in Lisp we cannot
* locally change the timezone without
* possibly interfering with other
* parts of the program. timegm, which
* uses UTC, is non-standard. Also
* time_t is inappropriate for general
* UTC times because it may a 32 bit
* type. */
}
#endif