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 #if 0
  66 int i2d_ASN1_UTCTIME(ASN1_UTCTIME *a, unsigned char **pp)
  67 {
  68 # ifndef CHARSET_EBCDIC
  69     return (i2d_ASN1_bytes((ASN1_STRING *)a, pp,
  70                            V_ASN1_UTCTIME, V_ASN1_UNIVERSAL));
  71 # else
  72     /* KLUDGE! We convert to ascii before writing DER */
  73     int len;
  74     char tmp[24];
  75     ASN1_STRING x = *(ASN1_STRING *)a;
  76
  77     len = x.length;
  78     ebcdic2ascii(tmp, x.data, (len >= sizeof tmp) ? sizeof tmp : len);
  79     x.data = tmp;
  80     return i2d_ASN1_bytes(&x, pp, V_ASN1_UTCTIME, V_ASN1_UNIVERSAL);
  81 # endif
  82 }
  83
  84 ASN1_UTCTIME *d2i_ASN1_UTCTIME(ASN1_UTCTIME **a, unsigned char **pp,
  85                                long length)
  86 {
  87     ASN1_UTCTIME *ret = NULL;
  88
  89     ret = (ASN1_UTCTIME *)d2i_ASN1_bytes((ASN1_STRING **)a, pp, length,
  90                                          V_ASN1_UTCTIME, V_ASN1_UNIVERSAL);
  91     if (ret == NULL) {
  92         ASN1err(ASN1_F_D2I_ASN1_UTCTIME, ERR_R_NESTED_ASN1_ERROR);
  93         return (NULL);
  94     }
  95 # ifdef CHARSET_EBCDIC
  96     ascii2ebcdic(ret->data, ret->data, ret->length);
  97 # endif
  98     if (!ASN1_UTCTIME_check(ret)) {
  99         ASN1err(ASN1_F_D2I_ASN1_UTCTIME, ASN1_R_INVALID_TIME_FORMAT);
 100         goto err;
 101     }
 102
 103     return (ret);
 104  err:
 105     if ((ret != NULL) && ((a == NULL) || (*a != ret)))
 106         M_ASN1_UTCTIME_free(ret);
 107     return (NULL);
 108 }
 109
 110 #endif
 111
 112 int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d)
 113 {
 114     static const int min[8] = { 0, 1, 1, 0, 0, 0, 0, 0 };
 115     static const int max[8] = { 99, 12, 31, 23, 59, 59, 12, 59 };
 116     char *a;
 117     int n, i, l, o;
 118
 119     if (d->type != V_ASN1_UTCTIME)
 120         return (0);
 121     l = d->length;
 122     a = (char *)d->data;
 123     o = 0;
 124
 125     if (l < 11)
 126         goto err;
 127     for (i = 0; i < 6; i++) {
 128         if ((i == 5) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
 129             i++;
 130             if (tm)
 131                 tm->tm_sec = 0;
 132             break;
 133         }
 134         if ((a[o] < '0') || (a[o] > '9'))
 135             goto err;
 136         n = a[o] - '0';
 137         if (++o > l)
 138             goto err;
 139
 140         if ((a[o] < '0') || (a[o] > '9'))
 141             goto err;
 142         n = (n * 10) + a[o] - '0';
 143         if (++o > l)
 144             goto err;
 145
 146         if ((n < min[i]) || (n > max[i]))
 147             goto err;
 148         if (tm) {
 149             switch (i) {
 150             case 0:
 151                 tm->tm_year = n < 50 ? n + 100 : n;
 152                 break;
 153             case 1:
 154                 tm->tm_mon = n - 1;
 155                 break;
 156             case 2:
 157                 tm->tm_mday = n;
 158                 break;
 159             case 3:
 160                 tm->tm_hour = n;
 161                 break;
 162             case 4:
 163                 tm->tm_min = n;
 164                 break;
 165             case 5:
 166                 tm->tm_sec = n;
 167                 break;
 168             }
 169         }
 170     }
 171     if (a[o] == 'Z')
 172         o++;
 173     else if ((a[o] == '+') || (a[o] == '-')) {
 174         int offsign = a[o] == '-' ? -1 : 1, offset = 0;
 175         o++;
 176         if (o + 4 > l)
 177             goto err;
 178         for (i = 6; i < 8; i++) {
 179             if ((a[o] < '0') || (a[o] > '9'))
 180                 goto err;
 181             n = a[o] - '0';
 182             o++;
 183             if ((a[o] < '0') || (a[o] > '9'))
 184                 goto err;
 185             n = (n * 10) + a[o] - '0';
 186             if ((n < min[i]) || (n > max[i]))
 187                 goto err;
 188             if (tm) {
 189                 if (i == 6)
 190                     offset = n * 3600;
 191                 else if (i == 7)
 192                     offset += n * 60;
 193             }
 194             o++;
 195         }
 196         if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
 197             return 0;
 198     }
 199     return o == l;
 200  err:
 201     return 0;
 202 }
 203
 204 int ASN1_UTCTIME_check(const ASN1_UTCTIME *d)
 205 {
 206     return asn1_utctime_to_tm(NULL, d);
 207 }
 208
 209 int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str)
 210 {
 211     ASN1_UTCTIME t;
 212
 213     t.type = V_ASN1_UTCTIME;
 214     t.length = strlen(str);
 215     t.data = (unsigned char *)str;
 216     if (ASN1_UTCTIME_check(&t)) {
 217         if (s != NULL) {
 218             if (!ASN1_STRING_set((ASN1_STRING *)s,
 219                                  (unsigned char *)str, t.length))
 220                 return 0;
 221             s->type = V_ASN1_UTCTIME;
 222         }
 223         return (1);
 224     } else
 225         return (0);
 226 }
 227
 228 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
 229 {
 230     return ASN1_UTCTIME_adj(s, t, 0, 0);
 231 }
 232
 233 ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t,
 234                                int offset_day, long offset_sec)
 235 {
 236     char *p;
 237     struct tm *ts;
 238     struct tm data;
 239     size_t len = 20;
 240     int free_s = 0;
 241
 242     if (s == NULL) {
 243         free_s = 1;
 244         s = M_ASN1_UTCTIME_new();
 245     }
 246     if (s == NULL)
 247         goto err;
 248
 249     ts = OPENSSL_gmtime(&t, &data);
 250     if (ts == NULL)
 251         goto err;
 252
 253     if (offset_day || offset_sec) {
 254         if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
 255             goto err;
 256     }
 257
 258     if ((ts->tm_year < 50) || (ts->tm_year >= 150))
 259         goto err;
 260
 261     p = (char *)s->data;
 262     if ((p == NULL) || ((size_t)s->length < len)) {
 263         p = OPENSSL_malloc(len);
 264         if (p == NULL) {
 265             ASN1err(ASN1_F_ASN1_UTCTIME_ADJ, ERR_R_MALLOC_FAILURE);
 266             goto err;
 267         }
 268         if (s->data != NULL)
 269             OPENSSL_free(s->data);
 270         s->data = (unsigned char *)p;
 271     }
 272
 273     BIO_snprintf(p, len, "%02d%02d%02d%02d%02d%02dZ", ts->tm_year % 100,
 274                  ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
 275                  ts->tm_sec);
 276     s->length = strlen(p);
 277     s->type = V_ASN1_UTCTIME;
 278 #ifdef CHARSET_EBCDIC_not
 279     ebcdic2ascii(s->data, s->data, s->length);
 280 #endif
 281     return (s);
 282  err:
 283     if (free_s && s)
 284         M_ASN1_UTCTIME_free(s);
 285     return NULL;
 286 }
 287
 288 int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
 289 {
 290     struct tm stm, ttm;
 291     int day, sec;
 292
 293     if (!asn1_utctime_to_tm(&stm, s))
 294         return -2;
 295
 296     if (!OPENSSL_gmtime(&t, &ttm))
 297         return -2;
 298
 299     if (!OPENSSL_gmtime_diff(&day, &sec, &stm, &ttm))
 300         return -2;
 301
 302     if (day > 0)
 303         return 1;
 304     if (day < 0)
 305         return -1;
 306     if (sec > 0)
 307         return 1;
 308     if (sec < 0)
 309         return -1;
 310     return 0;
 311 }
 312
 313 #if 0
 314 time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s)
 315 {
 316     struct tm tm;
 317     int offset;
 318
 319     memset(&tm, '\0', sizeof tm);
 320
 321 # define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
 322     tm.tm_year = g2(s->data);
 323     if (tm.tm_year < 50)
 324         tm.tm_year += 100;
 325     tm.tm_mon = g2(s->data + 2) - 1;
 326     tm.tm_mday = g2(s->data + 4);
 327     tm.tm_hour = g2(s->data + 6);
 328     tm.tm_min = g2(s->data + 8);
 329     tm.tm_sec = g2(s->data + 10);
 330     if (s->data[12] == 'Z')
 331         offset = 0;
 332     else {
 333         offset = g2(s->data + 13) * 60 + g2(s->data + 15);
 334         if (s->data[12] == '-')
 335             offset = -offset;
 336     }
 337 # undef g2
 338
 339     /*
 340      * FIXME: mktime assumes the current timezone
 341      * instead of UTC, and unless we rewrite OpenSSL
 342      * in Lisp we cannot locally change the timezone
 343      * without possibly interfering with other parts
 344      * of the program. timegm, which uses UTC, is
 345      * non-standard.
 346      * Also time_t is inappropriate for general
 347      * UTC times because it may a 32 bit type.
 348      */
 349     return mktime(&tm) - offset * 60;
 350 }
 351 #endif