crypto/asn1/a_gentm.c

   1 /* crypto/asn1/a_gentm.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 /*
  60  * GENERALIZEDTIME implementation, written by Steve Henson. Based on UTCTIME
  61  */
  62
  63 #include <stdio.h>
  64 #include <time.h>
  65 #include "cryptlib.h"
  66 #include <openssl/asn1.h>
  67 #include "asn1_locl.h"
  68
  69 int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d)
  70 {
  71     static const int min[9] = { 0, 0, 1, 1, 0, 0, 0, 0, 0 };
  72     static const int max[9] = { 99, 99, 12, 31, 23, 59, 59, 12, 59 };
  73     char *a;
  74     int n, i, l, o;
  75
  76     if (d->type != V_ASN1_GENERALIZEDTIME)
  77         return (0);
  78     l = d->length;
  79     a = (char *)d->data;
  80     o = 0;
  81     /*
  82      * GENERALIZEDTIME is similar to UTCTIME except the year is represented
  83      * as YYYY. This stuff treats everything as a two digit field so make
  84      * first two fields 00 to 99
  85      */
  86     if (l < 13)
  87         goto err;
  88     for (i = 0; i < 7; i++) {
  89         if ((i == 6) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
  90             i++;
  91             if (tm)
  92                 tm->tm_sec = 0;
  93             break;
  94         }
  95         if ((a[o] < '0') || (a[o] > '9'))
  96             goto err;
  97         n = a[o] - '0';
  98         if (++o > l)
  99             goto err;
 100
 101         if ((a[o] < '0') || (a[o] > '9'))
 102             goto err;
 103         n = (n * 10) + a[o] - '0';
 104         if (++o > l)
 105             goto err;
 106
 107         if ((n < min[i]) || (n > max[i]))
 108             goto err;
 109         if (tm) {
 110             switch (i) {
 111             case 0:
 112                 tm->tm_year = n * 100 - 1900;
 113                 break;
 114             case 1:
 115                 tm->tm_year += n;
 116                 break;
 117             case 2:
 118                 tm->tm_mon = n - 1;
 119                 break;
 120             case 3:
 121                 tm->tm_mday = n;
 122                 break;
 123             case 4:
 124                 tm->tm_hour = n;
 125                 break;
 126             case 5:
 127                 tm->tm_min = n;
 128                 break;
 129             case 6:
 130                 tm->tm_sec = n;
 131                 break;
 132             }
 133         }
 134     }
 135     /*
 136      * Optional fractional seconds: decimal point followed by one or more
 137      * digits.
 138      */
 139     if (a[o] == '.') {
 140         if (++o > l)
 141             goto err;
 142         i = o;
 143         while ((a[o] >= '0') && (a[o] <= '9') && (o <= l))
 144             o++;
 145         /* Must have at least one digit after decimal point */
 146         if (i == o)
 147             goto err;
 148     }
 149
 150     if (a[o] == 'Z')
 151         o++;
 152     else if ((a[o] == '+') || (a[o] == '-')) {
 153         int offsign = a[o] == '-' ? -1 : 1, offset = 0;
 154         o++;
 155         if (o + 4 > l)
 156             goto err;
 157         for (i = 7; i < 9; i++) {
 158             if ((a[o] < '0') || (a[o] > '9'))
 159                 goto err;
 160             n = a[o] - '0';
 161             o++;
 162             if ((a[o] < '0') || (a[o] > '9'))
 163                 goto err;
 164             n = (n * 10) + a[o] - '0';
 165             if ((n < min[i]) || (n > max[i]))
 166                 goto err;
 167             if (tm) {
 168                 if (i == 7)
 169                     offset = n * 3600;
 170                 else if (i == 8)
 171                     offset += n * 60;
 172             }
 173             o++;
 174         }
 175         if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
 176             return 0;
 177     } else if (a[o]) {
 178         /* Missing time zone information. */
 179         goto err;
 180     }
 181     return (o == l);
 182  err:
 183     return (0);
 184 }
 185
 186 int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
 187 {
 188     return asn1_generalizedtime_to_tm(NULL, d);
 189 }
 190
 191 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
 192 {
 193     ASN1_GENERALIZEDTIME t;
 194
 195     t.type = V_ASN1_GENERALIZEDTIME;
 196     t.length = strlen(str);
 197     t.data = (unsigned char *)str;
 198     if (ASN1_GENERALIZEDTIME_check(&t)) {
 199         if (s != NULL) {
 200             if (!ASN1_STRING_set((ASN1_STRING *)s,
 201                                  (unsigned char *)str, t.length))
 202                 return 0;
 203             s->type = V_ASN1_GENERALIZEDTIME;
 204         }
 205         return (1);
 206     } else
 207         return (0);
 208 }
 209
 210 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
 211                                                time_t t)
 212 {
 213     return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
 214 }
 215
 216 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
 217                                                time_t t, int offset_day,
 218                                                long offset_sec)
 219 {
 220     char *p;
 221     struct tm *ts;
 222     struct tm data;
 223     size_t len = 20;
 224
 225     if (s == NULL)
 226         s = ASN1_GENERALIZEDTIME_new();
 227     if (s == NULL)
 228         return (NULL);
 229
 230     ts = OPENSSL_gmtime(&t, &data);
 231     if (ts == NULL)
 232         return (NULL);
 233
 234     if (offset_day || offset_sec) {
 235         if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
 236             return NULL;
 237     }
 238
 239     p = (char *)s->data;
 240     if ((p == NULL) || ((size_t)s->length < len)) {
 241         p = OPENSSL_malloc(len);
 242         if (p == NULL) {
 243             ASN1err(ASN1_F_ASN1_GENERALIZEDTIME_ADJ, ERR_R_MALLOC_FAILURE);
 244             return (NULL);
 245         }
 246         if (s->data != NULL)
 247             OPENSSL_free(s->data);
 248         s->data = (unsigned char *)p;
 249     }
 250
 251     BIO_snprintf(p, len, "%04d%02d%02d%02d%02d%02dZ", ts->tm_year + 1900,
 252                  ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
 253                  ts->tm_sec);
 254     s->length = strlen(p);
 255     s->type = V_ASN1_GENERALIZEDTIME;
 256 #ifdef CHARSET_EBCDIC_not
 257     ebcdic2ascii(s->data, s->data, s->length);
 258 #endif
 259     return (s);
 260 }