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
  85 ASN1_UTCTIME *d2i_ASN1_UTCTIME(ASN1_UTCTIME **a, unsigned char **pp,
  86              long length)
  87         {
  88         ASN1_UTCTIME *ret=NULL;
  89
  90         ret=(ASN1_UTCTIME *)d2i_ASN1_bytes((ASN1_STRING **)a,pp,length,
  91                 V_ASN1_UTCTIME,V_ASN1_UNIVERSAL);
  92         if (ret == NULL)
  93                 {
  94                 ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ERR_R_NESTED_ASN1_ERROR);
  95                 return(NULL);
  96                 }
  97 #ifdef CHARSET_EBCDIC
  98         ascii2ebcdic(ret->data, ret->data, ret->length);
  99 #endif
 100         if (!ASN1_UTCTIME_check(ret))
 101                 {
 102                 ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ASN1_R_INVALID_TIME_FORMAT);
 103                 goto err;
 104                 }
 105
 106         return(ret);
 107 err:
 108         if ((ret != NULL) && ((a == NULL) || (*a != ret)))
 109                 M_ASN1_UTCTIME_free(ret);
 110         return(NULL);
 111         }
 112
 113 #endif
 114
 115 int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d)
 116         {
 117         static const int min[8]={ 0, 1, 1, 0, 0, 0, 0, 0};
 118         static const int max[8]={99,12,31,23,59,59,12,59};
 119         char *a;
 120         int n,i,l,o;
 121
 122         if (d->type != V_ASN1_UTCTIME) return(0);
 123         l=d->length;
 124         a=(char *)d->data;
 125         o=0;
 126
 127         if (l < 11) goto err;
 128         for (i=0; i<6; i++)
 129                 {
 130                 if ((i == 5) && ((a[o] == 'Z') ||
 131                         (a[o] == '+') || (a[o] == '-')))
 132                         {
 133                         i++;
 134                         if (tm)
 135                                 tm->tm_sec = 0;
 136                         break;
 137                         }
 138                 if ((a[o] < '0') || (a[o] > '9')) goto err;
 139                 n= a[o]-'0';
 140                 if (++o > l) goto err;
 141
 142                 if ((a[o] < '0') || (a[o] > '9')) goto err;
 143                 n=(n*10)+ a[o]-'0';
 144                 if (++o > l) goto err;
 145
 146                 if ((n < min[i]) || (n > max[i])) goto err;
 147                 if (tm)
 148                         {
 149                         switch(i)
 150                                 {
 151                         case 0:
 152                                 tm->tm_year = n < 50 ? n + 100 : n;
 153                                 break;
 154                         case 1:
 155                                 tm->tm_mon = n - 1;
 156                                 break;
 157                         case 2:
 158                                 tm->tm_mday = n;
 159                                 break;
 160                         case 3:
 161                                 tm->tm_hour = n;
 162                                 break;
 163                         case 4:
 164                                 tm->tm_min = n;
 165                                 break;
 166                         case 5:
 167                                 tm->tm_sec = n;
 168                                 break;
 169                                 }
 170                         }
 171                 }
 172         if (a[o] == 'Z')
 173                 o++;
 174         else if ((a[o] == '+') || (a[o] == '-'))
 175                 {
 176                 int offsign = a[o] == '-' ? -1 : 1, offset = 0;
 177                 o++;
 178                 if (o+4 > l) goto err;
 179                 for (i=6; i<8; i++)
 180                         {
 181                         if ((a[o] < '0') || (a[o] > '9')) goto err;
 182                         n= a[o]-'0';
 183                         o++;
 184                         if ((a[o] < '0') || (a[o] > '9')) goto err;
 185                         n=(n*10)+ a[o]-'0';
 186                         if ((n < min[i]) || (n > max[i])) goto err;
 187                         if (tm)
 188                                 {
 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                 {
 218                 if (s != NULL)
 219                         {
 220                         if (!ASN1_STRING_set((ASN1_STRING *)s,
 221                                 (unsigned char *)str,t.length))
 222                                 return 0;
 223                         s->type = V_ASN1_UTCTIME;
 224                         }
 225                 return(1);
 226                 }
 227         else
 228                 return(0);
 229         }
 230
 231 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
 232         {
 233         return ASN1_UTCTIME_adj(s, t, 0, 0);
 234         }
 235
 236 ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t,
 237                                 int offset_day, long offset_sec)
 238         {
 239         char *p;
 240         struct tm *ts;
 241         struct tm data;
 242         size_t len = 20;
 243         int free_s = 0;
 244
 245         if (s == NULL)
 246                 {
 247                 free_s = 1;
 248                 s=M_ASN1_UTCTIME_new();
 249                 }
 250         if (s == NULL)
 251                 goto err;
 252
 253
 254         ts=OPENSSL_gmtime(&t, &data);
 255         if (ts == NULL)
 256                 goto err;
 257
 258         if (offset_day || offset_sec)
 259                 {
 260                 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
 261                         goto err;
 262                 }
 263
 264         if((ts->tm_year < 50) || (ts->tm_year >= 150))
 265                 goto err;
 266
 267         p=(char *)s->data;
 268         if ((p == NULL) || ((size_t)s->length < len))
 269                 {
 270                 p=OPENSSL_malloc(len);
 271                 if (p == NULL)
 272                         {
 273                         ASN1err(ASN1_F_ASN1_UTCTIME_ADJ,ERR_R_MALLOC_FAILURE);
 274                         goto err;
 275                         }
 276                 if (s->data != NULL)
 277                         OPENSSL_free(s->data);
 278                 s->data=(unsigned char *)p;
 279                 }
 280
 281         BIO_snprintf(p,len,"%02d%02d%02d%02d%02d%02dZ",ts->tm_year%100,
 282                      ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec);
 283         s->length=strlen(p);
 284         s->type=V_ASN1_UTCTIME;
 285 #ifdef CHARSET_EBCDIC_not
 286         ebcdic2ascii(s->data, s->data, s->length);
 287 #endif
 288         return(s);
 289         err:
 290         if (free_s && s)
 291                 M_ASN1_UTCTIME_free(s);
 292         return NULL;
 293         }
 294
 295
 296 int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
 297         {
 298         struct tm stm, ttm;
 299         int day, sec;
 300
 301         if (!asn1_utctime_to_tm(&stm, s))
 302                 return -2;
 303
 304         if (!OPENSSL_gmtime(&t, &ttm))
 305                 return -2;
 306
 307         if (!OPENSSL_gmtime_diff(&day, &sec, &stm, &ttm))
 308                 return -2;
 309
 310         if (day > 0)
 311                 return 1;
 312         if (day < 0)
 313                 return -1;
 314         if (sec > 0)
 315                 return 1;
 316         if (sec < 0)
 317                 return -1;
 318         return 0;
 319         }
 320
 321
 322 #if 0
 323 time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s)
 324         {
 325         struct tm tm;
 326         int offset;
 327
 328         memset(&tm,'\0',sizeof tm);
 329
 330 #define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
 331         tm.tm_year=g2(s->data);
 332         if(tm.tm_year < 50)
 333                 tm.tm_year+=100;
 334         tm.tm_mon=g2(s->data+2)-1;
 335         tm.tm_mday=g2(s->data+4);
 336         tm.tm_hour=g2(s->data+6);
 337         tm.tm_min=g2(s->data+8);
 338         tm.tm_sec=g2(s->data+10);
 339         if(s->data[12] == 'Z')
 340                 offset=0;
 341         else
 342                 {
 343                 offset=g2(s->data+13)*60+g2(s->data+15);
 344                 if(s->data[12] == '-')
 345                         offset= -offset;
 346                 }
 347 #undef g2
 348
 349         return mktime(&tm)-offset*60; /* FIXME: mktime assumes the current timezone
 350                                        * instead of UTC, and unless we rewrite OpenSSL
 351                                        * in Lisp we cannot locally change the timezone
 352                                        * without possibly interfering with other parts
 353                                        * of the program. timegm, which uses UTC, is
 354                                        * non-standard.
 355                                        * Also time_t is inappropriate for general
 356                                        * UTC times because it may a 32 bit type. */
 357         }
 358 #endif