/* 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