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 "o_time.h"
  63 #include <openssl/asn1.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_check(ASN1_UTCTIME *d)
 113 {
 114     static int min[8] = { 0, 1, 1, 0, 0, 0, 0, 0 };
 115     static 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             break;
 131         }
 132         if ((a[o] < '0') || (a[o] > '9'))
 133             goto err;
 134         n = a[o] - '0';
 135         if (++o > l)
 136             goto err;
 137
 138         if ((a[o] < '0') || (a[o] > '9'))
 139             goto err;
 140         n = (n * 10) + a[o] - '0';
 141         if (++o > l)
 142             goto err;
 143
 144         if ((n < min[i]) || (n > max[i]))
 145             goto err;
 146     }
 147     if (a[o] == 'Z')
 148         o++;
 149     else if ((a[o] == '+') || (a[o] == '-')) {
 150         o++;
 151         if (o + 4 > l)
 152             goto err;
 153         for (i = 6; i < 8; i++) {
 154             if ((a[o] < '0') || (a[o] > '9'))
 155                 goto err;
 156             n = a[o] - '0';
 157             o++;
 158             if ((a[o] < '0') || (a[o] > '9'))
 159                 goto err;
 160             n = (n * 10) + a[o] - '0';
 161             if ((n < min[i]) || (n > max[i]))
 162                 goto err;
 163             o++;
 164         }
 165     }
 166     return (o == l);
 167  err:
 168     return (0);
 169 }
 170
 171 int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str)
 172 {
 173     ASN1_UTCTIME t;
 174
 175     t.type = V_ASN1_UTCTIME;
 176     t.length = strlen(str);
 177     t.data = (unsigned char *)str;
 178     if (ASN1_UTCTIME_check(&t)) {
 179         if (s != NULL) {
 180             if (!ASN1_STRING_set((ASN1_STRING *)s,
 181                                  (unsigned char *)str, t.length))
 182                 return 0;
 183             s->type = V_ASN1_UTCTIME;
 184         }
 185         return (1);
 186     } else
 187         return (0);
 188 }
 189
 190 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
 191 {
 192     char *p;
 193     struct tm *ts;
 194     struct tm data;
 195     size_t len = 20;
 196
 197     if (s == NULL)
 198         s = M_ASN1_UTCTIME_new();
 199     if (s == NULL)
 200         return (NULL);
 201
 202     ts = OPENSSL_gmtime(&t, &data);
 203     if (ts == NULL)
 204         return (NULL);
 205
 206     p = (char *)s->data;
 207     if ((p == NULL) || ((size_t)s->length < len)) {
 208         p = OPENSSL_malloc(len);
 209         if (p == NULL) {
 210             ASN1err(ASN1_F_ASN1_UTCTIME_SET, ERR_R_MALLOC_FAILURE);
 211             return (NULL);
 212         }
 213         if (s->data != NULL)
 214             OPENSSL_free(s->data);
 215         s->data = (unsigned char *)p;
 216     }
 217
 218     BIO_snprintf(p, len, "%02d%02d%02d%02d%02d%02dZ", ts->tm_year % 100,
 219                  ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
 220                  ts->tm_sec);
 221     s->length = strlen(p);
 222     s->type = V_ASN1_UTCTIME;
 223 #ifdef CHARSET_EBCDIC_not
 224     ebcdic2ascii(s->data, s->data, s->length);
 225 #endif
 226     return (s);
 227 }
 228
 229 int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
 230 {
 231     struct tm *tm;
 232     struct tm data;
 233     int offset;
 234     int year;
 235
 236 #define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
 237
 238     if (s->data[12] == 'Z')
 239         offset = 0;
 240     else {
 241         offset = g2(s->data + 13) * 60 + g2(s->data + 15);
 242         if (s->data[12] == '-')
 243             offset = -offset;
 244     }
 245
 246     t -= offset * 60;           /* FIXME: may overflow in extreme cases */
 247
 248     tm = OPENSSL_gmtime(&t, &data);
 249
 250 #define return_cmp(a,b) if ((a)<(b)) return -1; else if ((a)>(b)) return 1
 251     year = g2(s->data);
 252     if (year < 50)
 253         year += 100;
 254     return_cmp(year, tm->tm_year);
 255     return_cmp(g2(s->data + 2) - 1, tm->tm_mon);
 256     return_cmp(g2(s->data + 4), tm->tm_mday);
 257     return_cmp(g2(s->data + 6), tm->tm_hour);
 258     return_cmp(g2(s->data + 8), tm->tm_min);
 259     return_cmp(g2(s->data + 10), tm->tm_sec);
 260 #undef g2
 261 #undef return_cmp
 262
 263     return 0;
 264 }
 265
 266 #if 0
 267 time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s)
 268 {
 269     struct tm tm;
 270     int offset;
 271
 272     memset(&tm, '\0', sizeof tm);
 273
 274 # define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
 275     tm.tm_year = g2(s->data);
 276     if (tm.tm_year < 50)
 277         tm.tm_year += 100;
 278     tm.tm_mon = g2(s->data + 2) - 1;
 279     tm.tm_mday = g2(s->data + 4);
 280     tm.tm_hour = g2(s->data + 6);
 281     tm.tm_min = g2(s->data + 8);
 282     tm.tm_sec = g2(s->data + 10);
 283     if (s->data[12] == 'Z')
 284         offset = 0;
 285     else {
 286         offset = g2(s->data + 13) * 60 + g2(s->data + 15);
 287         if (s->data[12] == '-')
 288             offset = -offset;
 289     }
 290 # undef g2
 291
 292     /*
 293      * FIXME: mktime assumes the current timezone
 294      * instead of UTC, and unless we rewrite OpenSSL
 295      * in Lisp we cannot locally change the timezone
 296      * without possibly interfering with other parts
 297      * of the program. timegm, which uses UTC, is
 298      * non-standard.
 299      * Also time_t is inappropriate for general
 300      * UTC times because it may a 32 bit type.
 301      */
 302     return mktime(&tm) - offset * 60;
 303 }
 304 #endif