/* crypto/asn1/a_utctm.c */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 * 

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 * 

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 * 

 * 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 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 acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from 

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 * 

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS 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 AUTHOR OR 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.

 * 

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

/*

 © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

 */

#include <stdio.h>

#include <time.h>

#include "cryptlib.h"

#include "o_time.h"

#include <openssl/asn1.h>

#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

#include "libcrypto_wsd_macros.h"

#include "libcrypto_wsd.h"

#endif

#if 0

EXPORT_C int i2d_ASN1_UTCTIME(ASN1_UTCTIME *a, unsigned char **pp)

	{

#ifndef CHARSET_EBCDIC

	return(i2d_ASN1_bytes((ASN1_STRING *)a,pp,

		V_ASN1_UTCTIME,V_ASN1_UNIVERSAL));

#else

	/* KLUDGE! We convert to ascii before writing DER */

	int len;

	char tmp[24];

	ASN1_STRING x = *(ASN1_STRING *)a;

	len = x.length;

	ebcdic2ascii(tmp, x.data, (len >= sizeof tmp) ? sizeof tmp : len);

	x.data = tmp;

	return i2d_ASN1_bytes(&x, pp, V_ASN1_UTCTIME,V_ASN1_UNIVERSAL);

#endif

	}

EXPORT_C ASN1_UTCTIME *d2i_ASN1_UTCTIME(ASN1_UTCTIME **a, unsigned char **pp,

	     long length)

	{

	ASN1_UTCTIME *ret=NULL;

	ret=(ASN1_UTCTIME *)d2i_ASN1_bytes((ASN1_STRING **)a,pp,length,

		V_ASN1_UTCTIME,V_ASN1_UNIVERSAL);

	if (ret == NULL)

		{

		ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ERR_R_NESTED_ASN1_ERROR);

		return(NULL);

		}

#ifdef CHARSET_EBCDIC

	ascii2ebcdic(ret->data, ret->data, ret->length);

#endif

	if (!ASN1_UTCTIME_check(ret))

		{

		ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ASN1_R_INVALID_TIME_FORMAT);

		goto err;

		}

	return(ret);

err:

	if ((ret != NULL) && ((a == NULL) || (*a != ret)))

		M_ASN1_UTCTIME_free(ret);

	return(NULL);

	}

#endif

EXPORT_C int ASN1_UTCTIME_check(ASN1_UTCTIME *d)

	{

#ifdef EMULATOR	

	static int min[8]={ 0, 1, 1, 0, 0, 0, 0, 0};

	static int max[8]={99,12,31,23,59,59,12,59};

#else	

	static const int min[8]={ 0, 1, 1, 0, 0, 0, 0, 0};

	static const int max[8]={99,12,31,23,59,59,12,59};

#endif

	char *a;

	int n,i,l,o;

	if (d->type != V_ASN1_UTCTIME) return(0);

	l=d->length;

	a=(char *)d->data;

	o=0;

	if (l < 11) goto err;

	for (i=0; i<6; i++)

		{

		if ((i == 5) && ((a[o] == 'Z') ||

			(a[o] == '+') || (a[o] == '-')))

			{ i++; break; }

		if ((a[o] < '0') || (a[o] > '9')) goto err;

		n= a[o]-'0';

		if (++o > l) goto err;

		if ((a[o] < '0') || (a[o] > '9')) goto err;

		n=(n*10)+ a[o]-'0';

		if (++o > l) goto err;

		if ((n < min[i]) || (n > max[i])) goto err;

		}

	if (a[o] == 'Z')

		o++;

	else if ((a[o] == '+') || (a[o] == '-'))

		{

		o++;

		if (o+4 > l) goto err;

		for (i=6; i<8; i++)

			{

			if ((a[o] < '0') || (a[o] > '9')) goto err;

			n= a[o]-'0';

			o++;

			if ((a[o] < '0') || (a[o] > '9')) goto err;

			n=(n*10)+ a[o]-'0';

			if ((n < min[i]) || (n > max[i])) goto err;

			o++;

			}

		}

	return(o == l);

err:

	return(0);

	}

EXPORT_C int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str)

	{

	ASN1_UTCTIME t;

	t.type=V_ASN1_UTCTIME;

	t.length=strlen(str);

	t.data=(unsigned char *)str;

	if (ASN1_UTCTIME_check(&t))

		{

		if (s != NULL)

			{

			if (!ASN1_STRING_set((ASN1_STRING *)s,

				(unsigned char *)str,t.length))

				return 0;

			s->type = V_ASN1_UTCTIME;

			}

		return(1);

		}

	else

		return(0);

	}

EXPORT_C ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)

	{

	char *p;

	struct tm *ts;

	struct tm data;

	size_t len = 20;

	if (s == NULL)

		s=M_ASN1_UTCTIME_new();

	if (s == NULL)

		return(NULL);

	ts=OPENSSL_gmtime(&t, &data);

	if (ts == NULL)

		return(NULL);

	p=(char *)s->data;

	if ((p == NULL) || ((size_t)s->length < len))

		{

		p=OPENSSL_malloc(len);

		if (p == NULL)

			{

			ASN1err(ASN1_F_ASN1_UTCTIME_SET,ERR_R_MALLOC_FAILURE);

			return(NULL);

			}

		if (s->data != NULL)

			OPENSSL_free(s->data);

		s->data=(unsigned char *)p;

		}

	BIO_snprintf(p,len,"%02d%02d%02d%02d%02d%02dZ",ts->tm_year%100,

		     ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec);

	s->length=strlen(p);

	s->type=V_ASN1_UTCTIME;

#ifdef CHARSET_EBCDIC_not

	ebcdic2ascii(s->data, s->data, s->length);

#endif

	return(s);

	}

EXPORT_C int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)

	{

	struct tm *tm;

	struct tm data;

	int offset;

	int year;

#define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')

	if (s->data[12] == 'Z')

		offset=0;

	else

		{

		offset = g2(s->data+13)*60+g2(s->data+15);

		if (s->data[12] == '-')

			offset = -offset;

		}

	t -= offset*60; /* FIXME: may overflow in extreme cases */

	tm = OPENSSL_gmtime(&t, &data);

#define return_cmp(a,b) if ((a)<(b)) return -1; else if ((a)>(b)) return 1

	year = g2(s->data);

	if (year < 50)

		year += 100;

	return_cmp(year,              tm->tm_year);

	return_cmp(g2(s->data+2) - 1, tm->tm_mon);

	return_cmp(g2(s->data+4),     tm->tm_mday);

	return_cmp(g2(s->data+6),     tm->tm_hour);

	return_cmp(g2(s->data+8),     tm->tm_min);

	return_cmp(g2(s->data+10),    tm->tm_sec);

#undef g2

#undef return_cmp

	return 0;

	}

#if 0

EXPORT_C time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s)

	{

	struct tm tm;

	int offset;

	memset(&tm,'\0',sizeof tm);

#define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')

	tm.tm_year=g2(s->data);

	if(tm.tm_year < 50)

		tm.tm_year+=100;

	tm.tm_mon=g2(s->data+2)-1;

	tm.tm_mday=g2(s->data+4);

	tm.tm_hour=g2(s->data+6);

	tm.tm_min=g2(s->data+8);

	tm.tm_sec=g2(s->data+10);

	if(s->data[12] == 'Z')

		offset=0;

	else

		{

		offset=g2(s->data+13)*60+g2(s->data+15);

		if(s->data[12] == '-')

			offset= -offset;

		}

#undef g2

	return mktime(&tm)-offset*60; /* FIXME: mktime assumes the current timezone

	                               * instead of UTC, and unless we rewrite OpenSSL

				       * in Lisp we cannot locally change the timezone

				       * without possibly interfering with other parts

	                               * of the program. timegm, which uses UTC, is

				       * non-standard.

	                               * Also time_t is inappropriate for general

	                               * UTC times because it may a 32 bit type. */

	}

#endif