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https://github.com/DrKLO/Telegram.git
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303 lines
9.2 KiB
C
303 lines
9.2 KiB
C
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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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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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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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 the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.] */
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#include <openssl/asn1.h>
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#include <string.h>
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#include <time.h>
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#include <openssl/err.h>
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#include <openssl/mem.h>
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#include "asn1_locl.h"
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int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d)
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{
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static const int min[8] = { 0, 1, 1, 0, 0, 0, 0, 0 };
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static const int max[8] = { 99, 12, 31, 23, 59, 59, 12, 59 };
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char *a;
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int n, i, l, o;
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if (d->type != V_ASN1_UTCTIME)
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return (0);
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l = d->length;
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a = (char *)d->data;
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o = 0;
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if (l < 11)
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goto err;
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for (i = 0; i < 6; i++) {
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if ((i == 5) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
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i++;
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if (tm)
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tm->tm_sec = 0;
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break;
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}
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if ((a[o] < '0') || (a[o] > '9'))
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goto err;
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n = a[o] - '0';
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if (++o > l)
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goto err;
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if ((a[o] < '0') || (a[o] > '9'))
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goto err;
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n = (n * 10) + a[o] - '0';
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if (++o > l)
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goto err;
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if ((n < min[i]) || (n > max[i]))
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goto err;
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if (tm) {
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switch (i) {
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case 0:
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tm->tm_year = n < 50 ? n + 100 : n;
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break;
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case 1:
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tm->tm_mon = n - 1;
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break;
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case 2:
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tm->tm_mday = n;
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break;
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case 3:
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tm->tm_hour = n;
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break;
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case 4:
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tm->tm_min = n;
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break;
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case 5:
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tm->tm_sec = n;
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break;
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}
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}
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}
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if (a[o] == 'Z')
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o++;
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else if ((a[o] == '+') || (a[o] == '-')) {
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int offsign = a[o] == '-' ? 1 : -1, offset = 0;
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o++;
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if (o + 4 > l)
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goto err;
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for (i = 6; i < 8; i++) {
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if ((a[o] < '0') || (a[o] > '9'))
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goto err;
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n = a[o] - '0';
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o++;
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if ((a[o] < '0') || (a[o] > '9'))
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goto err;
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n = (n * 10) + a[o] - '0';
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if ((n < min[i]) || (n > max[i]))
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goto err;
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if (tm) {
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if (i == 6)
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offset = n * 3600;
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else if (i == 7)
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offset += n * 60;
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}
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o++;
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}
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if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
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return 0;
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}
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return o == l;
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err:
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return 0;
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}
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int ASN1_UTCTIME_check(const ASN1_UTCTIME *d)
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{
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return asn1_utctime_to_tm(NULL, d);
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}
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int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str)
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{
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ASN1_UTCTIME t;
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t.type = V_ASN1_UTCTIME;
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t.length = strlen(str);
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t.data = (unsigned char *)str;
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if (ASN1_UTCTIME_check(&t)) {
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if (s != NULL) {
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if (!ASN1_STRING_set((ASN1_STRING *)s,
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(unsigned char *)str, t.length))
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return 0;
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s->type = V_ASN1_UTCTIME;
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}
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return (1);
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} else
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return (0);
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}
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ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
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{
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return ASN1_UTCTIME_adj(s, t, 0, 0);
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}
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ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t,
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int offset_day, long offset_sec)
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{
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char *p;
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struct tm *ts;
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struct tm data;
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size_t len = 20;
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int free_s = 0;
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if (s == NULL) {
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free_s = 1;
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s = M_ASN1_UTCTIME_new();
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}
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if (s == NULL)
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goto err;
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ts = OPENSSL_gmtime(&t, &data);
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if (ts == NULL)
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goto err;
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if (offset_day || offset_sec) {
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if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
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goto err;
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}
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if ((ts->tm_year < 50) || (ts->tm_year >= 150))
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goto err;
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p = (char *)s->data;
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if ((p == NULL) || ((size_t)s->length < len)) {
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p = OPENSSL_malloc(len);
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if (p == NULL) {
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OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (s->data != NULL)
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OPENSSL_free(s->data);
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s->data = (unsigned char *)p;
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}
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BIO_snprintf(p, len, "%02d%02d%02d%02d%02d%02dZ", ts->tm_year % 100,
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ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
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ts->tm_sec);
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s->length = strlen(p);
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s->type = V_ASN1_UTCTIME;
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return (s);
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err:
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if (free_s && s)
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M_ASN1_UTCTIME_free(s);
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return NULL;
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}
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int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
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{
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struct tm stm, ttm;
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int day, sec;
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if (!asn1_utctime_to_tm(&stm, s))
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return -2;
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if (!OPENSSL_gmtime(&t, &ttm))
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return -2;
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if (!OPENSSL_gmtime_diff(&day, &sec, &ttm, &stm))
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return -2;
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if (day > 0)
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return 1;
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if (day < 0)
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return -1;
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if (sec > 0)
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return 1;
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if (sec < 0)
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return -1;
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return 0;
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}
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#if 0
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time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s)
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{
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struct tm tm;
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int offset;
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OPENSSL_memset(&tm, '\0', sizeof tm);
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# define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
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tm.tm_year = g2(s->data);
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if (tm.tm_year < 50)
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tm.tm_year += 100;
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tm.tm_mon = g2(s->data + 2) - 1;
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tm.tm_mday = g2(s->data + 4);
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tm.tm_hour = g2(s->data + 6);
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tm.tm_min = g2(s->data + 8);
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tm.tm_sec = g2(s->data + 10);
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if (s->data[12] == 'Z')
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offset = 0;
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else {
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offset = g2(s->data + 13) * 60 + g2(s->data + 15);
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if (s->data[12] == '-')
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offset = -offset;
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}
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# undef g2
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return mktime(&tm) - offset * 60; /* FIXME: mktime assumes the current
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* timezone instead of UTC, and unless
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* we rewrite OpenSSL in Lisp we cannot
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* locally change the timezone without
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* possibly interfering with other
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* parts of the program. timegm, which
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* uses UTC, is non-standard. Also
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* time_t is inappropriate for general
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* UTC times because it may a 32 bit
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* type. */
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}
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#endif
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