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 /* GENERALIZEDTIME implementation, written by Steve Henson. Based on UTCTIME */
  60
  61 #include <stdio.h>
  62 #include <time.h>
  63 #include "cryptlib.h"
  64 #include <openssl/asn1.h>
  65
  66 /* ASN1err(ASN1_F_ASN1_GENERALIZEDTIME_NEW,ASN1_R_GENERALIZEDTIME_TOO_LONG);
  67  * ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME,ASN1_R_EXPECTING_A_GENERALIZEDTIME);
  68  */
  69
  70 int i2d_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME *a, unsigned char **pp)
  71         {
  72         return(i2d_ASN1_bytes((ASN1_STRING *)a,pp,
  73                 V_ASN1_GENERALIZEDTIME,V_ASN1_UNIVERSAL));
  74         }
  75
  76
  77 ASN1_GENERALIZEDTIME *d2i_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME **a,
  78              unsigned char **pp, long length)
  79         {
  80         ASN1_GENERALIZEDTIME *ret=NULL;
  81
  82         ret=(ASN1_GENERALIZEDTIME *)d2i_ASN1_bytes((ASN1_STRING **)a,pp,length,
  83                 V_ASN1_GENERALIZEDTIME,V_ASN1_UNIVERSAL);
  84         if (ret == NULL)
  85                 {
  86                 ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME,ERR_R_NESTED_ASN1_ERROR);
  87                 return(NULL);
  88                 }
  89         if (!ASN1_GENERALIZEDTIME_check(ret))
  90                 {
  91                 ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME,ASN1_R_INVALID_TIME_FORMAT);
  92                 goto err;
  93                 }
  94
  95         return(ret);
  96 err:
  97         if ((ret != NULL) && ((a == NULL) || (*a != ret)))
  98                 ASN1_GENERALIZEDTIME_free(ret);
  99         return(NULL);
 100         }
 101
 102 int ASN1_GENERALIZEDTIME_check(ASN1_GENERALIZEDTIME *d)
 103         {
 104         static int min[9]={ 0, 0, 1, 1, 0, 0, 0, 0, 0};
 105         static int max[9]={99, 99,12,31,23,59,59,12,59};
 106         char *a;
 107         int n,i,l,o;
 108
 109         if (d->type != V_ASN1_GENERALIZEDTIME) return(0);
 110         l=d->length;
 111         a=(char *)d->data;
 112         o=0;
 113         /* GENERALIZEDTIME is similar to UTCTIME except the year is
 114          * represented as YYYY. This stuff treats everything as a two digit
 115          * field so make first two fields 00 to 99
 116          */
 117         if (l < 13) goto err;
 118         for (i=0; i<7; i++)
 119                 {
 120                 if ((i == 6) && ((a[o] == 'Z') ||
 121                         (a[o] == '+') || (a[o] == '-')))
 122                         { i++; break; }
 123                 if ((a[o] < '0') || (a[o] > '9')) goto err;
 124                 n= a[o]-'0';
 125                 if (++o > l) goto err;
 126
 127                 if ((a[o] < '0') || (a[o] > '9')) goto err;
 128                 n=(n*10)+ a[o]-'0';
 129                 if (++o > l) goto err;
 130
 131                 if ((n < min[i]) || (n > max[i])) goto err;
 132                 }
 133         if (a[o] == 'Z')
 134                 o++;
 135         else if ((a[o] == '+') || (a[o] == '-'))
 136                 {
 137                 o++;
 138                 if (o+4 > l) goto err;
 139                 for (i=7; i<9; i++)
 140                         {
 141                         if ((a[o] < '0') || (a[o] > '9')) goto err;
 142                         n= a[o]-'0';
 143                         o++;
 144                         if ((a[o] < '0') || (a[o] > '9')) goto err;
 145                         n=(n*10)+ a[o]-'0';
 146                         if ((n < min[i]) || (n > max[i])) goto err;
 147                         o++;
 148                         }
 149                 }
 150         return(o == l);
 151 err:
 152         return(0);
 153         }
 154
 155 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, char *str)
 156         {
 157         ASN1_GENERALIZEDTIME t;
 158
 159         t.type=V_ASN1_GENERALIZEDTIME;
 160         t.length=strlen(str);
 161         t.data=(unsigned char *)str;
 162         if (ASN1_GENERALIZEDTIME_check(&t))
 163                 {
 164                 if (s != NULL)
 165                         {
 166                         ASN1_STRING_set((ASN1_STRING *)s,
 167                                 (unsigned char *)str,t.length);
 168                         }
 169                 return(1);
 170                 }
 171         else
 172                 return(0);
 173         }
 174
 175 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
 176              time_t t)
 177         {
 178         char *p;
 179         struct tm *ts;
 180 #if defined(THREADS) && !defined(WIN32)
 181         struct tm data;
 182 #endif
 183
 184         if (s == NULL)
 185                 s=ASN1_GENERALIZEDTIME_new();
 186         if (s == NULL)
 187                 return(NULL);
 188
 189 #if defined(THREADS) && !defined(WIN32)
 190         ts=(struct tm *)gmtime_r(&t,&data);
 191 #else
 192         ts=(struct tm *)gmtime(&t);
 193 #endif
 194         p=(char *)s->data;
 195         if ((p == NULL) || (s->length < 16))
 196                 {
 197                 p=Malloc(20);
 198                 if (p == NULL) return(NULL);
 199                 if (s->data != NULL)
 200                         Free(s->data);
 201                 s->data=(unsigned char *)p;
 202                 }
 203
 204         sprintf(p,"%04d%02d%02d%02d%02d%02dZ",ts->tm_year,
 205                 ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec);
 206         s->length=strlen(p);
 207         s->type=V_ASN1_GENERALIZEDTIME;
 208         return(s);
 209         }