crypto/asn1/a_utctm.c

   1 /* crypto/asn1/a_utctm.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include <time.h>
  61 #include "cryptlib.h"
  62 #include <openssl/asn1.h>
  63 #include "asn1_locl.h"
  64
  65 int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d)
  66 {
  67     static const int min[8] = { 0, 1, 1, 0, 0, 0, 0, 0 };
  68     static const int max[8] = { 99, 12, 31, 23, 59, 59, 12, 59 };
  69     char *a;
  70     int n, i, l, o;
  71
  72     if (d->type != V_ASN1_UTCTIME)
  73         return (0);
  74     l = d->length;
  75     a = (char *)d->data;
  76     o = 0;
  77
  78     if (l < 11)
  79         goto err;
  80     for (i = 0; i < 6; i++) {
  81         if ((i == 5) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
  82             i++;
  83             if (tm)
  84                 tm->tm_sec = 0;
  85             break;
  86         }
  87         if ((a[o] < '0') || (a[o] > '9'))
  88             goto err;
  89         n = a[o] - '0';
  90         if (++o > l)
  91             goto err;
  92
  93         if ((a[o] < '0') || (a[o] > '9'))
  94             goto err;
  95         n = (n * 10) + a[o] - '0';
  96         if (++o > l)
  97             goto err;
  98
  99         if ((n < min[i]) || (n > max[i]))
 100             goto err;
 101         if (tm) {
 102             switch (i) {
 103             case 0:
 104                 tm->tm_year = n < 50 ? n + 100 : n;
 105                 break;
 106             case 1:
 107                 tm->tm_mon = n - 1;
 108                 break;
 109             case 2:
 110                 tm->tm_mday = n;
 111                 break;
 112             case 3:
 113                 tm->tm_hour = n;
 114                 break;
 115             case 4:
 116                 tm->tm_min = n;
 117                 break;
 118             case 5:
 119                 tm->tm_sec = n;
 120                 break;
 121             }
 122         }
 123     }
 124     if (a[o] == 'Z')
 125         o++;
 126     else if ((a[o] == '+') || (a[o] == '-')) {
 127         int offsign = a[o] == '-' ? -1 : 1, offset = 0;
 128         o++;
 129         if (o + 4 > l)
 130             goto err;
 131         for (i = 6; i < 8; i++) {
 132             if ((a[o] < '0') || (a[o] > '9'))
 133                 goto err;
 134             n = a[o] - '0';
 135             o++;
 136             if ((a[o] < '0') || (a[o] > '9'))
 137                 goto err;
 138             n = (n * 10) + a[o] - '0';
 139             if ((n < min[i]) || (n > max[i]))
 140                 goto err;
 141             if (tm) {
 142                 if (i == 6)
 143                     offset = n * 3600;
 144                 else if (i == 7)
 145                     offset += n * 60;
 146             }
 147             o++;
 148         }
 149         if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
 150             return 0;
 151     }
 152     return o == l;
 153  err:
 154     return 0;
 155 }
 156
 157 int ASN1_UTCTIME_check(const ASN1_UTCTIME *d)
 158 {
 159     return asn1_utctime_to_tm(NULL, d);
 160 }
 161
 162 int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str)
 163 {
 164     ASN1_UTCTIME t;
 165
 166     t.type = V_ASN1_UTCTIME;
 167     t.length = strlen(str);
 168     t.data = (unsigned char *)str;
 169     if (ASN1_UTCTIME_check(&t)) {
 170         if (s != NULL) {
 171             if (!ASN1_STRING_set((ASN1_STRING *)s,
 172                                  (unsigned char *)str, t.length))
 173                 return 0;
 174             s->type = V_ASN1_UTCTIME;
 175         }
 176         return (1);
 177     } else
 178         return (0);
 179 }
 180
 181 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
 182 {
 183     return ASN1_UTCTIME_adj(s, t, 0, 0);
 184 }
 185
 186 ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t,
 187                                int offset_day, long offset_sec)
 188 {
 189     char *p;
 190     struct tm *ts;
 191     struct tm data;
 192     size_t len = 20;
 193     int free_s = 0;
 194
 195     if (s == NULL) {
 196         free_s = 1;
 197         s = M_ASN1_UTCTIME_new();
 198     }
 199     if (s == NULL)
 200         goto err;
 201
 202     ts = OPENSSL_gmtime(&t, &data);
 203     if (ts == NULL)
 204         goto err;
 205
 206     if (offset_day || offset_sec) {
 207         if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
 208             goto err;
 209     }
 210
 211     if ((ts->tm_year < 50) || (ts->tm_year >= 150))
 212         goto err;
 213
 214     p = (char *)s->data;
 215     if ((p == NULL) || ((size_t)s->length < len)) {
 216         p = OPENSSL_malloc(len);
 217         if (p == NULL) {
 218             ASN1err(ASN1_F_ASN1_UTCTIME_ADJ, ERR_R_MALLOC_FAILURE);
 219             goto err;
 220         }
 221         if (s->data != NULL)
 222             OPENSSL_free(s->data);
 223         s->data = (unsigned char *)p;
 224     }
 225
 226     BIO_snprintf(p, len, "%02d%02d%02d%02d%02d%02dZ", ts->tm_year % 100,
 227                  ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
 228                  ts->tm_sec);
 229     s->length = strlen(p);
 230     s->type = V_ASN1_UTCTIME;
 231 #ifdef CHARSET_EBCDIC_not
 232     ebcdic2ascii(s->data, s->data, s->length);
 233 #endif
 234     return (s);
 235  err:
 236     if (free_s && s)
 237         M_ASN1_UTCTIME_free(s);
 238     return NULL;
 239 }
 240
 241 int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
 242 {
 243     struct tm stm, ttm;
 244     int day, sec;
 245
 246     if (!asn1_utctime_to_tm(&stm, s))
 247         return -2;
 248
 249     if (!OPENSSL_gmtime(&t, &ttm))
 250         return -2;
 251
 252     if (!OPENSSL_gmtime_diff(&day, &sec, &stm, &ttm))
 253         return -2;
 254
 255     if (day > 0)
 256         return 1;
 257     if (day < 0)
 258         return -1;
 259     if (sec > 0)
 260         return 1;
 261     if (sec < 0)
 262         return -1;
 263     return 0;
 264 }