text: /* 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.] */
  
  #include <openssl/asn1.h>
  
  #include <string.h>
  
  #include <openssl/err.h>
  #include <openssl/mem.h>
  #include <openssl/time_support.h>
  
  
  int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d)
  	{
  	static const int min[9]={ 0, 0, 1, 1, 0, 0, 0, 0, 0};
  	static const int max[9]={99, 99,12,31,23,59,59,12,59};
  	char *a;
  	int n,i,l,o;
  
  	if (d->type != V_ASN1_GENERALIZEDTIME) return(0);
  	l=d->length;
  	a=(char *)d->data;
  	o=0;
  	/* GENERALIZEDTIME is similar to UTCTIME except the year is
           * represented as YYYY. This stuff treats everything as a two digit
           * field so make first two fields 00 to 99
           */
  	if (l < 13) goto err;
  	for (i=0; i<7; i++)
  		{
  		if ((i == 6) && ((a[o] == 'Z') ||
  			(a[o] == '+') || (a[o] == '-')))
  			{
  			i++;
  			if (tm)
  				tm->tm_sec = 0;
  			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 (tm)
  			{
  			switch(i)
  				{
  			case 0:
  				tm->tm_year = n * 100 - 1900;
  				break;
  			case 1:
  				tm->tm_year += n;
  				break;
  			case 2:
  				tm->tm_mon = n - 1;
  				break;
  			case 3:
  				tm->tm_mday = n;
  				break;
  			case 4:
  				tm->tm_hour = n;
  				break;
  			case 5:
  				tm->tm_min = n;
  				break;
  			case 6:
  				tm->tm_sec = n;
  				break;
  				}
  			}
  		}
  	/* Optional fractional seconds: decimal point followed by one
  	 * or more digits.
  	 */
  	if (a[o] == '.')
  		{
  		if (++o > l) goto err;
  		i = o;
  		while ((a[o] >= '0') && (a[o] <= '9') && (o <= l))
  			o++;
  		/* Must have at least one digit after decimal point */
  		if (i == o) goto err;
  		}
  
  	if (a[o] == 'Z')
  		o++;
  	else if ((a[o] == '+') || (a[o] == '-'))
  		{
  		int offsign = a[o] == '-' ? -1 : 1, offset = 0;
  		o++;
  		if (o+4 > l) goto err;
  		for (i=7; i<9; 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;
  			if (tm)
  				{
  				if (i == 7)
  					offset = n * 3600;
  				else if (i == 8)
  					offset += n * 60;
  				}
  			o++;
  			}
  		if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
  			return 0;
  		}
  	else if (a[o])
  		{
  		/* Missing time zone information. */
  		goto err;
  		}
  	return(o == l);
  err:
  	return(0);
  	}
  
  int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
  	{
  	return asn1_generalizedtime_to_tm(NULL, d);
  	}
  
  int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
  	{
  	ASN1_GENERALIZEDTIME t;
  
  	t.type=V_ASN1_GENERALIZEDTIME;
  	t.length=strlen(str);
  	t.data=(unsigned char *)str;
  	if (ASN1_GENERALIZEDTIME_check(&t))
  		{
  		if (s != NULL)
  			{
  			if (!ASN1_STRING_set((ASN1_STRING *)s,
  				(unsigned char *)str,t.length))
  				return 0;
  			s->type=V_ASN1_GENERALIZEDTIME;
  			}
  		return(1);
  		}
  	else
  		return(0);
  	}
  
  ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
  	     time_t t)
  	{
  		return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
  	}
  
  ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
  	     time_t t, int offset_day, long offset_sec)
  	{
  	char *p;
  	struct tm *ts;
  	struct tm data;
  	size_t len = 20; 
  
  	if (s == NULL)
  		s=M_ASN1_GENERALIZEDTIME_new();
  	if (s == NULL)
  		return(NULL);
  
  	ts=OPENSSL_gmtime(&t, &data);
  	if (ts == NULL)
  		return(NULL);
  
  	if (offset_day || offset_sec)
  		{ 
  		if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
  			return NULL;
  		}
  
  	p=(char *)s->data;
  	if ((p == NULL) || ((size_t)s->length < len))
  		{
  		p=OPENSSL_malloc(len);
  		if (p == NULL)
  			{
  			OPENSSL_PUT_ERROR(ASN1, ASN1_GENERALIZEDTIME_adj, ERR_R_MALLOC_FAILURE);
  			return(NULL);
  			}
  		if (s->data != NULL)
  			OPENSSL_free(s->data);
  		s->data=(unsigned char *)p;
  		}
  
  	BIO_snprintf(p,len,"%04d%02d%02d%02d%02d%02dZ",ts->tm_year + 1900,
  		     ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec);
  	s->length=strlen(p);
  	s->type=V_ASN1_GENERALIZEDTIME;
  	return(s);
  	}
  