/* 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

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  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

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  * 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

 EXPORT_C 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

 EXPORT_C 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);

 	}

 EXPORT_C 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 */

 EXPORT_C 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;

 	}