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