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 "o_time.h"
  67 #include <openssl/asn1.h>
  68 #include "asn1_locl.h"
  69
  70 #if 0
  71
  72 int i2d_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME *a, unsigned char **pp)
  73 {
  74 # ifdef CHARSET_EBCDIC
  75     /* KLUDGE! We convert to ascii before writing DER */
  76     int len;
  77     char tmp[24];
  78     ASN1_STRING tmpstr = *(ASN1_STRING *)a;
  79
  80     len = tmpstr.length;
  81     ebcdic2ascii(tmp, tmpstr.data, (len >= sizeof tmp) ? sizeof tmp : len);
  82     tmpstr.data = tmp;
  83
  84     a = (ASN1_GENERALIZEDTIME *)&tmpstr;
  85 # endif
  86     return (i2d_ASN1_bytes((ASN1_STRING *)a, pp,
  87                            V_ASN1_GENERALIZEDTIME, V_ASN1_UNIVERSAL));
  88 }
  89
  90 ASN1_GENERALIZEDTIME *d2i_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME **a,
  91                                                unsigned char **pp,
  92                                                long length)
  93 {
  94     ASN1_GENERALIZEDTIME *ret = NULL;
  95
  96     ret =
  97         (ASN1_GENERALIZEDTIME *)d2i_ASN1_bytes((ASN1_STRING **)a, pp, length,
  98                                                V_ASN1_GENERALIZEDTIME,
  99                                                V_ASN1_UNIVERSAL);
 100     if (ret == NULL) {
 101         ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME, ERR_R_NESTED_ASN1_ERROR);
 102         return (NULL);
 103     }
 104 # ifdef CHARSET_EBCDIC
 105     ascii2ebcdic(ret->data, ret->data, ret->length);
 106 # endif
 107     if (!ASN1_GENERALIZEDTIME_check(ret)) {
 108         ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME, ASN1_R_INVALID_TIME_FORMAT);
 109         goto err;
 110     }
 111
 112     return (ret);
 113  err:
 114     if ((ret != NULL) && ((a == NULL) || (*a != ret)))
 115         M_ASN1_GENERALIZEDTIME_free(ret);
 116     return (NULL);
 117 }
 118
 119 #endif
 120
 121 int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d)
 122 {
 123     static const int min[9] = { 0, 0, 1, 1, 0, 0, 0, 0, 0 };
 124     static const int max[9] = { 99, 99, 12, 31, 23, 59, 59, 12, 59 };
 125     char *a;
 126     int n, i, l, o;
 127
 128     if (d->type != V_ASN1_GENERALIZEDTIME)
 129         return (0);
 130     l = d->length;
 131     a = (char *)d->data;
 132     o = 0;
 133     /*
 134      * GENERALIZEDTIME is similar to UTCTIME except the year is represented
 135      * as YYYY. This stuff treats everything as a two digit field so make
 136      * first two fields 00 to 99
 137      */
 138     if (l < 13)
 139         goto err;
 140     for (i = 0; i < 7; i++) {
 141         if ((i == 6) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
 142             i++;
 143             if (tm)
 144                 tm->tm_sec = 0;
 145             break;
 146         }
 147         if ((a[o] < '0') || (a[o] > '9'))
 148             goto err;
 149         n = a[o] - '0';
 150         if (++o > l)
 151             goto err;
 152
 153         if ((a[o] < '0') || (a[o] > '9'))
 154             goto err;
 155         n = (n * 10) + a[o] - '0';
 156         if (++o > l)
 157             goto err;
 158
 159         if ((n < min[i]) || (n > max[i]))
 160             goto err;
 161         if (tm) {
 162             switch (i) {
 163             case 0:
 164                 tm->tm_year = n * 100 - 1900;
 165                 break;
 166             case 1:
 167                 tm->tm_year += n;
 168                 break;
 169             case 2:
 170                 tm->tm_mon = n - 1;
 171                 break;
 172             case 3:
 173                 tm->tm_mday = n;
 174                 break;
 175             case 4:
 176                 tm->tm_hour = n;
 177                 break;
 178             case 5:
 179                 tm->tm_min = n;
 180                 break;
 181             case 6:
 182                 tm->tm_sec = n;
 183                 break;
 184             }
 185         }
 186     }
 187     /*
 188      * Optional fractional seconds: decimal point followed by one or more
 189      * digits.
 190      */
 191     if (a[o] == '.') {
 192         if (++o > l)
 193             goto err;
 194         i = o;
 195         while ((a[o] >= '0') && (a[o] <= '9') && (o <= l))
 196             o++;
 197         /* Must have at least one digit after decimal point */
 198         if (i == o)
 199             goto err;
 200     }
 201
 202     if (a[o] == 'Z')
 203         o++;
 204     else if ((a[o] == '+') || (a[o] == '-')) {
 205         int offsign = a[o] == '-' ? -1 : 1, offset = 0;
 206         o++;
 207         if (o + 4 > l)
 208             goto err;
 209         for (i = 7; i < 9; i++) {
 210             if ((a[o] < '0') || (a[o] > '9'))
 211                 goto err;
 212             n = a[o] - '0';
 213             o++;
 214             if ((a[o] < '0') || (a[o] > '9'))
 215                 goto err;
 216             n = (n * 10) + a[o] - '0';
 217             if ((n < min[i]) || (n > max[i]))
 218                 goto err;
 219             if (tm) {
 220                 if (i == 7)
 221                     offset = n * 3600;
 222                 else if (i == 8)
 223                     offset += n * 60;
 224             }
 225             o++;
 226         }
 227         if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
 228             return 0;
 229     } else if (a[o]) {
 230         /* Missing time zone information. */
 231         goto err;
 232     }
 233     return (o == l);
 234  err:
 235     return (0);
 236 }
 237
 238 int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
 239 {
 240     return asn1_generalizedtime_to_tm(NULL, d);
 241 }
 242
 243 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
 244 {
 245     ASN1_GENERALIZEDTIME t;
 246
 247     t.type = V_ASN1_GENERALIZEDTIME;
 248     t.length = strlen(str);
 249     t.data = (unsigned char *)str;
 250     if (ASN1_GENERALIZEDTIME_check(&t)) {
 251         if (s != NULL) {
 252             if (!ASN1_STRING_set((ASN1_STRING *)s,
 253                                  (unsigned char *)str, t.length))
 254                 return 0;
 255             s->type = V_ASN1_GENERALIZEDTIME;
 256         }
 257         return (1);
 258     } else
 259         return (0);
 260 }
 261
 262 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
 263                                                time_t t)
 264 {
 265     return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
 266 }
 267
 268 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
 269                                                time_t t, int offset_day,
 270                                                long offset_sec)
 271 {
 272     char *p;
 273     struct tm *ts;
 274     struct tm data;
 275     size_t len = 20;
 276
 277     if (s == NULL)
 278         s = M_ASN1_GENERALIZEDTIME_new();
 279     if (s == NULL)
 280         return (NULL);
 281
 282     ts = OPENSSL_gmtime(&t, &data);
 283     if (ts == NULL)
 284         return (NULL);
 285
 286     if (offset_day || offset_sec) {
 287         if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
 288             return NULL;
 289     }
 290
 291     p = (char *)s->data;
 292     if ((p == NULL) || ((size_t)s->length < len)) {
 293         p = OPENSSL_malloc(len);
 294         if (p == NULL) {
 295             ASN1err(ASN1_F_ASN1_GENERALIZEDTIME_ADJ, ERR_R_MALLOC_FAILURE);
 296             return (NULL);
 297         }
 298         if (s->data != NULL)
 299             OPENSSL_free(s->data);
 300         s->data = (unsigned char *)p;
 301     }
 302
 303     BIO_snprintf(p, len, "%04d%02d%02d%02d%02d%02dZ", ts->tm_year + 1900,
 304                  ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
 305                  ts->tm_sec);
 306     s->length = strlen(p);
 307     s->type = V_ASN1_GENERALIZEDTIME;
 308 #ifdef CHARSET_EBCDIC_not
 309     ebcdic2ascii(s->data, s->data, s->length);
 310 #endif
 311     return (s);
 312 }