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
  64 int i2d_ASN1_UTCTIME(ASN1_UTCTIME *a, unsigned char **pp)
  65         {
  66         return(i2d_ASN1_bytes((ASN1_STRING *)a,pp,
  67                 V_ASN1_UTCTIME,V_ASN1_UNIVERSAL));
  68         }
  69
  70
  71 ASN1_UTCTIME *d2i_ASN1_UTCTIME(ASN1_UTCTIME **a, unsigned char **pp,
  72              long length)
  73         {
  74         ASN1_UTCTIME *ret=NULL;
  75
  76         ret=(ASN1_UTCTIME *)d2i_ASN1_bytes((ASN1_STRING **)a,pp,length,
  77                 V_ASN1_UTCTIME,V_ASN1_UNIVERSAL);
  78         if (ret == NULL)
  79                 {
  80                 ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ERR_R_NESTED_ASN1_ERROR);
  81                 return(NULL);
  82                 }
  83         if (!ASN1_UTCTIME_check(ret))
  84                 {
  85                 ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ASN1_R_INVALID_TIME_FORMAT);
  86                 goto err;
  87                 }
  88
  89         return(ret);
  90 err:
  91         if ((ret != NULL) && ((a == NULL) || (*a != ret)))
  92                 ASN1_UTCTIME_free(ret);
  93         return(NULL);
  94         }
  95
  96 int ASN1_UTCTIME_check(ASN1_UTCTIME *d)
  97         {
  98         static int min[8]={ 0, 1, 1, 0, 0, 0, 0, 0};
  99         static int max[8]={99,12,31,23,59,59,12,59};
 100         char *a;
 101         int n,i,l,o;
 102
 103         if (d->type != V_ASN1_UTCTIME) return(0);
 104         l=d->length;
 105         a=(char *)d->data;
 106         o=0;
 107
 108         if (l < 11) goto err;
 109         for (i=0; i<6; i++)
 110                 {
 111                 if ((i == 5) && ((a[o] == 'Z') ||
 112                         (a[o] == '+') || (a[o] == '-')))
 113                         { i++; break; }
 114                 if ((a[o] < '0') || (a[o] > '9')) goto err;
 115                 n= a[o]-'0';
 116                 if (++o > l) goto err;
 117
 118                 if ((a[o] < '0') || (a[o] > '9')) goto err;
 119                 n=(n*10)+ a[o]-'0';
 120                 if (++o > l) goto err;
 121
 122                 if ((n < min[i]) || (n > max[i])) goto err;
 123                 }
 124         if (a[o] == 'Z')
 125                 o++;
 126         else if ((a[o] == '+') || (a[o] == '-'))
 127                 {
 128                 o++;
 129                 if (o+4 > l) goto err;
 130                 for (i=6; i<8; i++)
 131                         {
 132                         if ((a[o] < '0') || (a[o] > '9')) goto err;
 133                         n= a[o]-'0';
 134                         o++;
 135                         if ((a[o] < '0') || (a[o] > '9')) goto err;
 136                         n=(n*10)+ a[o]-'0';
 137                         if ((n < min[i]) || (n > max[i])) goto err;
 138                         o++;
 139                         }
 140                 }
 141         return(o == l);
 142 err:
 143         return(0);
 144         }
 145
 146 int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, char *str)
 147         {
 148         ASN1_UTCTIME t;
 149
 150         t.type=V_ASN1_UTCTIME;
 151         t.length=strlen(str);
 152         t.data=(unsigned char *)str;
 153         if (ASN1_UTCTIME_check(&t))
 154                 {
 155                 if (s != NULL)
 156                         {
 157                         ASN1_STRING_set((ASN1_STRING *)s,
 158                                 (unsigned char *)str,t.length);
 159                         }
 160                 return(1);
 161                 }
 162         else
 163                 return(0);
 164         }
 165
 166 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
 167         {
 168         char *p;
 169         struct tm *ts;
 170 #if defined(THREADS) && !defined(WIN32)
 171         struct tm data;
 172 #endif
 173
 174         if (s == NULL)
 175                 s=ASN1_UTCTIME_new();
 176         if (s == NULL)
 177                 return(NULL);
 178
 179 #if defined(THREADS) && !defined(WIN32)
 180         gmtime_r(&t,&data);
 181         ts=&data;
 182 #else
 183         ts=gmtime(&t);
 184 #endif
 185         p=(char *)s->data;
 186         if ((p == NULL) || (s->length < 14))
 187                 {
 188                 p=Malloc(20);
 189                 if (p == NULL) return(NULL);
 190                 if (s->data != NULL)
 191                         Free(s->data);
 192                 s->data=(unsigned char *)p;
 193                 }
 194
 195         sprintf(p,"%02d%02d%02d%02d%02d%02dZ",ts->tm_year%100,
 196                 ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec);
 197         s->length=strlen(p);
 198         s->type=V_ASN1_UTCTIME;
 199         return(s);
 200         }