262 lines
8.3 KiB
C
262 lines
8.3 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_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d)
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{
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static const int min[9] = { 0, 0, 1, 1, 0, 0, 0, 0, 0 };
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static const int max[9] = { 99, 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_GENERALIZEDTIME)
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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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/*
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* GENERALIZEDTIME is similar to UTCTIME except the year is represented
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* as YYYY. This stuff treats everything as a two digit field so make
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* first two fields 00 to 99
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*/
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if (l < 13)
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goto err;
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for (i = 0; i < 7; i++) {
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if ((i == 6) && ((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 * 100 - 1900;
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break;
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case 1:
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tm->tm_year += n;
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break;
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case 2:
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tm->tm_mon = n - 1;
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break;
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case 3:
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tm->tm_mday = n;
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break;
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case 4:
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tm->tm_hour = n;
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break;
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case 5:
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tm->tm_min = n;
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break;
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case 6:
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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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/*
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* Optional fractional seconds: decimal point followed by one or more
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* digits.
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*/
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if (a[o] == '.') {
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if (++o > l)
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goto err;
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i = o;
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while ((a[o] >= '0') && (a[o] <= '9') && (o <= l))
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o++;
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/* Must have at least one digit after decimal point */
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if (i == o)
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goto err;
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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 = 7; i < 9; 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 == 7)
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offset = n * 3600;
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else if (i == 8)
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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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} else if (a[o]) {
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/* Missing time zone information. */
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goto err;
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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_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
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{
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return asn1_generalizedtime_to_tm(NULL, d);
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}
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int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
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{
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ASN1_GENERALIZEDTIME t;
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t.type = V_ASN1_GENERALIZEDTIME;
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t.length = strlen(str);
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t.data = (unsigned char *)str;
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if (ASN1_GENERALIZEDTIME_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_GENERALIZEDTIME;
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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_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
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time_t t)
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{
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return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
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}
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ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
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time_t t, int offset_day,
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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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ASN1_GENERALIZEDTIME *tmps = NULL;
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if (s == NULL)
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tmps = ASN1_GENERALIZEDTIME_new();
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else
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tmps = s;
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if (tmps == NULL)
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return NULL;
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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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p = (char *)tmps->data;
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if ((p == NULL) || ((size_t)tmps->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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OPENSSL_free(tmps->data);
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tmps->data = (unsigned char *)p;
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}
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BIO_snprintf(p, len, "%04d%02d%02d%02d%02d%02dZ", ts->tm_year + 1900,
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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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tmps->length = strlen(p);
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tmps->type = V_ASN1_GENERALIZEDTIME;
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return tmps;
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err:
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if (s == NULL)
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ASN1_GENERALIZEDTIME_free(tmps);
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return NULL;
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}
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