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a_time.c

/* crypto/asn1/a_time.c */
/* ====================================================================
 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */


/* This is an implementation of the ASN1 Time structure which is:
 *    Time ::= CHOICE {
 *      utcTime        UTCTime,
 *      generalTime    GeneralizedTime }
 * written by Steve Henson.
 */

#include <stdio.h>
#include <time.h>
#include "cryptlib.h"
#include "o_time.h"
#include <openssl/asn1t.h>

IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME)

IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME)

#if 0
int i2d_ASN1_TIME(ASN1_TIME *a, unsigned char **pp)
      {
#ifdef CHARSET_EBCDIC
      /* KLUDGE! We convert to ascii before writing DER */
      char tmp[24];
      ASN1_STRING tmpstr;

      if(a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME) {
          int len;

          tmpstr = *(ASN1_STRING *)a;
          len = tmpstr.length;
          ebcdic2ascii(tmp, tmpstr.data, (len >= sizeof tmp) ? sizeof tmp : len);
          tmpstr.data = tmp;
          a = (ASN1_GENERALIZEDTIME *) &tmpstr;
      }
#endif
      if(a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME)
                        return(i2d_ASN1_bytes((ASN1_STRING *)a,pp,
                             a->type ,V_ASN1_UNIVERSAL));
      ASN1err(ASN1_F_I2D_ASN1_TIME,ASN1_R_EXPECTING_A_TIME);
      return -1;
      }
#endif


ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t)
      {
      struct tm *ts;
      struct tm data;

      ts=OPENSSL_gmtime(&t,&data);
      if (ts == NULL)
            {
            ASN1err(ASN1_F_ASN1_TIME_SET, ASN1_R_ERROR_GETTING_TIME);
            return NULL;
            }
      if((ts->tm_year >= 50) && (ts->tm_year < 150))
                              return ASN1_UTCTIME_set(s, t);
      return ASN1_GENERALIZEDTIME_set(s,t);
      }

int ASN1_TIME_check(ASN1_TIME *t)
      {
      if (t->type == V_ASN1_GENERALIZEDTIME)
            return ASN1_GENERALIZEDTIME_check(t);
      else if (t->type == V_ASN1_UTCTIME)
            return ASN1_UTCTIME_check(t);
      return 0;
      }

/* Convert an ASN1_TIME structure to GeneralizedTime */
ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t, ASN1_GENERALIZEDTIME **out)
      {
      ASN1_GENERALIZEDTIME *ret;
      char *str;
      int newlen;

      if (!ASN1_TIME_check(t)) return NULL;

      if (!out || !*out)
            {
            if (!(ret = ASN1_GENERALIZEDTIME_new ()))
                  return NULL;
            if (out) *out = ret;
            }
      else ret = *out;

      /* If already GeneralizedTime just copy across */
      if (t->type == V_ASN1_GENERALIZEDTIME)
            {
            if(!ASN1_STRING_set(ret, t->data, t->length))
                  return NULL;
            return ret;
            }

      /* grow the string */
      if (!ASN1_STRING_set(ret, NULL, t->length + 2))
            return NULL;
      /* ASN1_STRING_set() allocated 'len + 1' bytes. */
      newlen = t->length + 2 + 1;
      str = (char *)ret->data;
      /* Work out the century and prepend */
      if (t->data[0] >= '5') BUF_strlcpy(str, "19", newlen);
      else BUF_strlcpy(str, "20", newlen);

      BUF_strlcat(str, (char *)t->data, newlen);

      return ret;
      }

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