crypto/asn1/a_time.c

   1 /* crypto/asn1/a_time.c */
   2 /* ====================================================================
   3  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the
  15  *    distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this
  18  *    software must display the following acknowledgment:
  19  *    "This product includes software developed by the OpenSSL Project
  20  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  21  *
  22  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  23  *    endorse or promote products derived from this software without
  24  *    prior written permission. For written permission, please contact
  25  *    licensing@OpenSSL.org.
  26  *
  27  * 5. Products derived from this software may not be called "OpenSSL"
  28  *    nor may "OpenSSL" appear in their names without prior written
  29  *    permission of the OpenSSL Project.
  30  *
  31  * 6. Redistributions of any form whatsoever must retain the following
  32  *    acknowledgment:
  33  *    "This product includes software developed by the OpenSSL Project
  34  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  37  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  39  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  42  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  43  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  44  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  45  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  46  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  47  * OF THE POSSIBILITY OF SUCH DAMAGE.
  48  * ====================================================================
  49  *
  50  * This product includes cryptographic software written by Eric Young
  51  * (eay@cryptsoft.com).  This product includes software written by Tim
  52  * Hudson (tjh@cryptsoft.com).
  53  *
  54  */
  55
  56
  57 /* This is an implementation of the ASN1 Time structure which is:
  58  *    Time ::= CHOICE {
  59  *      utcTime        UTCTime,
  60  *      generalTime    GeneralizedTime }
  61  * written by Steve Henson.
  62  */
  63
  64 #include <stdio.h>
  65 #include <time.h>
  66 #include "cryptlib.h"
  67 #include <openssl/asn1t.h>
  68
  69 IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME)
  70
  71 IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME)
  72
  73 #if 0
  74 int i2d_ASN1_TIME(ASN1_TIME *a, unsigned char **pp)
  75         {
  76 #ifdef CHARSET_EBCDIC
  77         /* KLUDGE! We convert to ascii before writing DER */
  78         char tmp[24];
  79         ASN1_STRING tmpstr;
  80
  81         if(a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME) {
  82             int len;
  83
  84             tmpstr = *(ASN1_STRING *)a;
  85             len = tmpstr.length;
  86             ebcdic2ascii(tmp, tmpstr.data, (len >= sizeof tmp) ? sizeof tmp : len);
  87             tmpstr.data = tmp;
  88             a = (ASN1_GENERALIZEDTIME *) &tmpstr;
  89         }
  90 #endif
  91         if(a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME)
  92                                 return(i2d_ASN1_bytes((ASN1_STRING *)a,pp,
  93                                      a->type ,V_ASN1_UNIVERSAL));
  94         ASN1err(ASN1_F_I2D_ASN1_TIME,ASN1_R_EXPECTING_A_TIME);
  95         return -1;
  96         }
  97 #endif
  98
  99
 100 ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t)
 101         {
 102         struct tm *ts;
 103 #if defined(OPENSSL_THREADS) && !defined(WIN32) && !defined(__CYGWIN32__)
 104         struct tm data;
 105
 106         gmtime_r(&t,&data);
 107         ts=&data; /* should return &data, but doesn't on some systems, so we don't even look at the return value */
 108 #else
 109         ts=gmtime(&t);
 110 #endif
 111         if((ts->tm_year >= 50) && (ts->tm_year < 150))
 112                                         return ASN1_UTCTIME_set(s, t);
 113         return ASN1_GENERALIZEDTIME_set(s,t);
 114         }
 115
 116 int ASN1_TIME_check(ASN1_TIME *t)
 117         {
 118         if (t->type == V_ASN1_GENERALIZEDTIME)
 119                 return ASN1_GENERALIZEDTIME_check(t);
 120         else if (t->type == V_ASN1_UTCTIME)
 121                 return ASN1_UTCTIME_check(t);
 122         return 0;
 123         }
 124
 125 /* Convert an ASN1_TIME structure to GeneralizedTime */
 126 ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t, ASN1_GENERALIZEDTIME **out)
 127         {
 128         ASN1_GENERALIZEDTIME *ret;
 129         char *str;
 130
 131         if (!ASN1_TIME_check(t)) return NULL;
 132
 133         if (!out || !*out)
 134                 {
 135                 if (!(ret = ASN1_GENERALIZEDTIME_new ()))
 136                         return NULL;
 137                 if (out) *out = ret;
 138                 }
 139         else ret = *out;
 140
 141         /* If already GeneralizedTime just copy across */
 142         if (t->type == V_ASN1_GENERALIZEDTIME)
 143                 {
 144                 if(!ASN1_STRING_set(ret, t->data, t->length))
 145                         return NULL;
 146                 return ret;
 147                 }
 148
 149         /* grow the string */
 150         if (!ASN1_STRING_set(ret, NULL, t->length + 2))
 151                 return NULL;
 152         str = (char *)ret->data;
 153         /* Work out the century and prepend */
 154         if (t->data[0] >= '5') strcpy(str, "19");
 155         else strcpy(str, "20");
 156
 157         strcat(str, (char *)t->data);
 158
 159         return ret;
 160         }