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 "o_time.h"
  68 #include <openssl/asn1t.h>
  69
  70 IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME)
  71
  72 IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME)
  73
  74 #if 0
  75 int i2d_ASN1_TIME(ASN1_TIME *a, unsigned char **pp)
  76         {
  77 #ifdef CHARSET_EBCDIC
  78         /* KLUDGE! We convert to ascii before writing DER */
  79         char tmp[24];
  80         ASN1_STRING tmpstr;
  81
  82         if(a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME) {
  83             int len;
  84
  85             tmpstr = *(ASN1_STRING *)a;
  86             len = tmpstr.length;
  87             ebcdic2ascii(tmp, tmpstr.data, (len >= sizeof tmp) ? sizeof tmp : len);
  88             tmpstr.data = tmp;
  89             a = (ASN1_GENERALIZEDTIME *) &tmpstr;
  90         }
  91 #endif
  92         if(a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME)
  93                                 return(i2d_ASN1_bytes((ASN1_STRING *)a,pp,
  94                                      a->type ,V_ASN1_UNIVERSAL));
  95         ASN1err(ASN1_F_I2D_ASN1_TIME,ASN1_R_EXPECTING_A_TIME);
  96         return -1;
  97         }
  98 #endif
  99
 100
 101 ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t)
 102         {
 103         struct tm *ts;
 104         struct tm data;
 105
 106         ts=OPENSSL_gmtime(&t,&data);
 107         if (ts == NULL)
 108                 {
 109                 ASN1err(ASN1_F_ASN1_TIME_SET, ASN1_R_ERROR_GETTING_TIME);
 110                 return NULL;
 111                 }
 112         if((ts->tm_year >= 50) && (ts->tm_year < 150))
 113                                         return ASN1_UTCTIME_set(s, t);
 114         return ASN1_GENERALIZEDTIME_set(s,t);
 115         }
 116
 117 int ASN1_TIME_check(ASN1_TIME *t)
 118         {
 119         if (t->type == V_ASN1_GENERALIZEDTIME)
 120                 return ASN1_GENERALIZEDTIME_check(t);
 121         else if (t->type == V_ASN1_UTCTIME)
 122                 return ASN1_UTCTIME_check(t);
 123         return 0;
 124         }
 125
 126 /* Convert an ASN1_TIME structure to GeneralizedTime */
 127 ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t, ASN1_GENERALIZEDTIME **out)
 128         {
 129         ASN1_GENERALIZEDTIME *ret;
 130         char *str;
 131
 132         if (!ASN1_TIME_check(t)) return NULL;
 133
 134         if (!out || !*out)
 135                 {
 136                 if (!(ret = ASN1_GENERALIZEDTIME_new ()))
 137                         return NULL;
 138                 if (out) *out = ret;
 139                 }
 140         else ret = *out;
 141
 142         /* If already GeneralizedTime just copy across */
 143         if (t->type == V_ASN1_GENERALIZEDTIME)
 144                 {
 145                 if(!ASN1_STRING_set(ret, t->data, t->length))
 146                         return NULL;
 147                 return ret;
 148                 }
 149
 150         /* grow the string */
 151         if (!ASN1_STRING_set(ret, NULL, t->length + 2))
 152                 return NULL;
 153         str = (char *)ret->data;
 154         /* Work out the century and prepend */
 155         if (t->data[0] >= '5') strcpy(str, "19");
 156         else strcpy(str, "20");
 157
 158         BUF_strlcat(str, (char *)t->data, t->length+3); /* Include space for a '\0' */
 159
 160         return ret;
 161         }