crypto/openssl-0.9.7e/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 int min[8]={ 0, 1, 1, 0, 0, 0, 0, 0};
 118         static 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, 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                         ASN1_STRING_set((ASN1_STRING *)s,
 177                                 (unsigned char *)str,t.length);
 178                         s->type = V_ASN1_UTCTIME;
 179                         }
 180                 return(1);
 181                 }
 182         else
 183                 return(0);
 184         }
 185
 186 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
 187         {
 188         char *p;
 189         struct tm *ts;
 190         struct tm data;
 191         size_t len = 20;
 192
 193         if (s == NULL)
 194                 s=M_ASN1_UTCTIME_new();
 195         if (s == NULL)
 196                 return(NULL);
 197
 198         ts=OPENSSL_gmtime(&t, &data);
 199         if (ts == NULL)
 200                 return(NULL);
 201
 202         p=(char *)s->data;
 203         if ((p == NULL) || ((size_t)s->length < len))
 204                 {
 205                 p=OPENSSL_malloc(len);
 206                 if (p == NULL) return(NULL);
 207                 if (s->data != NULL)
 208                         OPENSSL_free(s->data);
 209                 s->data=(unsigned char *)p;
 210                 }
 211
 212         BIO_snprintf(p,len,"%02d%02d%02d%02d%02d%02dZ",ts->tm_year%100,
 213                      ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec);
 214         s->length=strlen(p);
 215         s->type=V_ASN1_UTCTIME;
 216 #ifdef CHARSET_EBCDIC_not
 217         ebcdic2ascii(s->data, s->data, s->length);
 218 #endif
 219         return(s);
 220         }
 221
 222
 223 int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
 224         {
 225         struct tm *tm;
 226         struct tm data;
 227         int offset;
 228         int year;
 229
 230 #define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
 231
 232         if (s->data[12] == 'Z')
 233                 offset=0;
 234         else
 235                 {
 236                 offset = g2(s->data+13)*60+g2(s->data+15);
 237                 if (s->data[12] == '-')
 238                         offset = -offset;
 239                 }
 240
 241         t -= offset*60; /* FIXME: may overflow in extreme cases */
 242
 243         tm = OPENSSL_gmtime(&t, &data);
 244
 245 #define return_cmp(a,b) if ((a)<(b)) return -1; else if ((a)>(b)) return 1
 246         year = g2(s->data);
 247         if (year < 50)
 248                 year += 100;
 249         return_cmp(year,              tm->tm_year);
 250         return_cmp(g2(s->data+2) - 1, tm->tm_mon);
 251         return_cmp(g2(s->data+4),     tm->tm_mday);
 252         return_cmp(g2(s->data+6),     tm->tm_hour);
 253         return_cmp(g2(s->data+8),     tm->tm_min);
 254         return_cmp(g2(s->data+10),    tm->tm_sec);
 255 #undef g2
 256 #undef return_cmp
 257
 258         return 0;
 259         }
 260
 261
 262 #if 0
 263 time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s)
 264         {
 265         struct tm tm;
 266         int offset;
 267
 268         memset(&tm,'\0',sizeof tm);
 269
 270 #define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
 271         tm.tm_year=g2(s->data);
 272         if(tm.tm_year < 50)
 273                 tm.tm_year+=100;
 274         tm.tm_mon=g2(s->data+2)-1;
 275         tm.tm_mday=g2(s->data+4);
 276         tm.tm_hour=g2(s->data+6);
 277         tm.tm_min=g2(s->data+8);
 278         tm.tm_sec=g2(s->data+10);
 279         if(s->data[12] == 'Z')
 280                 offset=0;
 281         else
 282                 {
 283                 offset=g2(s->data+13)*60+g2(s->data+15);
 284                 if(s->data[12] == '-')
 285                         offset= -offset;
 286                 }
 287 #undef g2
 288
 289         return mktime(&tm)-offset*60; /* FIXME: mktime assumes the current timezone
 290                                        * instead of UTC, and unless we rewrite OpenSSL
 291                                        * in Lisp we cannot locally change the timezone
 292                                        * without possibly interfering with other parts
 293                                        * of the program. timegm, which uses UTC, is
 294                                        * non-standard.
 295                                        * Also time_t is inappropriate for general
 296                                        * UTC times because it may a 32 bit type. */
 297         }
 298 #endif