crypto/asn1/a_gentm.c - boringssl - Git at Google

 /* 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 <time.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, 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);
 	}
	/* 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 <time.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, 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);
	}