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 #if 0
  67
  68 int i2d_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME *a, unsigned char **pp)
  69         {
  70 #ifdef CHARSET_EBCDIC
  71         /* KLUDGE! We convert to ascii before writing DER */
  72         int len;
  73         char tmp[24];
  74         ASN1_STRING tmpstr = *(ASN1_STRING *)a;
  75
  76         len = tmpstr.length;
  77         ebcdic2ascii(tmp, tmpstr.data, (len >= sizeof tmp) ? sizeof tmp : len);
  78         tmpstr.data = tmp;
  79
  80         a = (ASN1_GENERALIZEDTIME *) &tmpstr;
  81 #endif
  82         return(i2d_ASN1_bytes((ASN1_STRING *)a,pp,
  83                 V_ASN1_GENERALIZEDTIME,V_ASN1_UNIVERSAL));
  84         }
  85
  86
  87 ASN1_GENERALIZEDTIME *d2i_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME **a,
  88              unsigned char **pp, long length)
  89         {
  90         ASN1_GENERALIZEDTIME *ret=NULL;
  91
  92         ret=(ASN1_GENERALIZEDTIME *)d2i_ASN1_bytes((ASN1_STRING **)a,pp,length,
  93                 V_ASN1_GENERALIZEDTIME,V_ASN1_UNIVERSAL);
  94         if (ret == NULL)
  95                 {
  96                 ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME,ERR_R_NESTED_ASN1_ERROR);
  97                 return(NULL);
  98                 }
  99 #ifdef CHARSET_EBCDIC
 100         ascii2ebcdic(ret->data, ret->data, ret->length);
 101 #endif
 102         if (!ASN1_GENERALIZEDTIME_check(ret))
 103                 {
 104                 ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME,ASN1_R_INVALID_TIME_FORMAT);
 105                 goto err;
 106                 }
 107
 108         return(ret);
 109 err:
 110         if ((ret != NULL) && ((a == NULL) || (*a != ret)))
 111                 M_ASN1_GENERALIZEDTIME_free(ret);
 112         return(NULL);
 113         }
 114
 115 #endif
 116
 117 int ASN1_GENERALIZEDTIME_check(ASN1_GENERALIZEDTIME *d)
 118         {
 119         static int min[9]={ 0, 0, 1, 1, 0, 0, 0, 0, 0};
 120         static int max[9]={99, 99,12,31,23,59,59,12,59};
 121         char *a;
 122         int n,i,l,o;
 123
 124         if (d->type != V_ASN1_GENERALIZEDTIME) return(0);
 125         l=d->length;
 126         a=(char *)d->data;
 127         o=0;
 128         /* GENERALIZEDTIME is similar to UTCTIME except the year is
 129          * represented as YYYY. This stuff treats everything as a two digit
 130          * field so make first two fields 00 to 99
 131          */
 132         if (l < 13) goto err;
 133         for (i=0; i<7; i++)
 134                 {
 135                 if ((i == 6) && ((a[o] == 'Z') ||
 136                         (a[o] == '+') || (a[o] == '-')))
 137                         { i++; break; }
 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                 }
 148         if (a[o] == 'Z')
 149                 o++;
 150         else if ((a[o] == '+') || (a[o] == '-'))
 151                 {
 152                 o++;
 153                 if (o+4 > l) goto err;
 154                 for (i=7; i<9; i++)
 155                         {
 156                         if ((a[o] < '0') || (a[o] > '9')) goto err;
 157                         n= a[o]-'0';
 158                         o++;
 159                         if ((a[o] < '0') || (a[o] > '9')) goto err;
 160                         n=(n*10)+ a[o]-'0';
 161                         if ((n < min[i]) || (n > max[i])) goto err;
 162                         o++;
 163                         }
 164                 }
 165         return(o == l);
 166 err:
 167         return(0);
 168         }
 169
 170 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, char *str)
 171         {
 172         ASN1_GENERALIZEDTIME t;
 173
 174         t.type=V_ASN1_GENERALIZEDTIME;
 175         t.length=strlen(str);
 176         t.data=(unsigned char *)str;
 177         if (ASN1_GENERALIZEDTIME_check(&t))
 178                 {
 179                 if (s != NULL)
 180                         {
 181                         ASN1_STRING_set((ASN1_STRING *)s,
 182                                 (unsigned char *)str,t.length);
 183                         }
 184                 return(1);
 185                 }
 186         else
 187                 return(0);
 188         }
 189
 190 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
 191              time_t t)
 192         {
 193         char *p;
 194         struct tm *ts;
 195 #if defined(THREADS) && !defined(WIN32)
 196         struct tm data;
 197 #endif
 198
 199         if (s == NULL)
 200                 s=M_ASN1_GENERALIZEDTIME_new();
 201         if (s == NULL)
 202                 return(NULL);
 203
 204 #if defined(THREADS) && !defined(WIN32)
 205         gmtime_r(&t,&data); /* should return &data, but doesn't on some systems, so we don't even look at the return value */
 206         ts=&data;
 207 #else
 208         ts=gmtime(&t);
 209 #endif
 210         p=(char *)s->data;
 211         if ((p == NULL) || (s->length < 16))
 212                 {
 213                 p=OPENSSL_malloc(20);
 214                 if (p == NULL) return(NULL);
 215                 if (s->data != NULL)
 216                         OPENSSL_free(s->data);
 217                 s->data=(unsigned char *)p;
 218                 }
 219
 220         sprintf(p,"%04d%02d%02d%02d%02d%02dZ",ts->tm_year + 1900,
 221                 ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec);
 222         s->length=strlen(p);
 223         s->type=V_ASN1_GENERALIZEDTIME;
 224 #ifdef CHARSET_EBCDIC_not
 225         ebcdic2ascii(s->data, s->data, s->length);
 226 #endif
 227         return(s);
 228         }