/* crypto/x509/x509_v3.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.]

 */

#include <stdio.h>

#include <openssl/stack.h>

#include "cryptlib.h"

#include <openssl/asn1.h>

#include <openssl/objects.h>

#include <openssl/evp.h>

#include <openssl/x509.h>

#include <openssl/x509v3.h>

EXPORT_C int X509v3_get_ext_count(const STACK_OF(X509_EXTENSION) *x)

	{

	if (x == NULL) return(0);

	return(sk_X509_EXTENSION_num(x));

	}

EXPORT_C int X509v3_get_ext_by_NID(const STACK_OF(X509_EXTENSION) *x, int nid,

			  int lastpos)

	{

	ASN1_OBJECT *obj;

	obj=OBJ_nid2obj(nid);

	if (obj == NULL) return(-2);

	return(X509v3_get_ext_by_OBJ(x,obj,lastpos));

	}

EXPORT_C int X509v3_get_ext_by_OBJ(const STACK_OF(X509_EXTENSION) *sk, ASN1_OBJECT *obj,

			  int lastpos)

	{

	int n;

	X509_EXTENSION *ex;

	if (sk == NULL) return(-1);

	lastpos++;

	if (lastpos < 0)

		lastpos=0;

	n=sk_X509_EXTENSION_num(sk);

	for ( ; lastpos < n; lastpos++)

		{

		ex=sk_X509_EXTENSION_value(sk,lastpos);

		if (OBJ_cmp(ex->object,obj) == 0)

			return(lastpos);

		}

	return(-1);

	}

EXPORT_C int X509v3_get_ext_by_critical(const STACK_OF(X509_EXTENSION) *sk, int crit,

			       int lastpos)

	{

	int n;

	X509_EXTENSION *ex;

	if (sk == NULL) return(-1);

	lastpos++;

	if (lastpos < 0)

		lastpos=0;

	n=sk_X509_EXTENSION_num(sk);

	for ( ; lastpos < n; lastpos++)

		{

		ex=sk_X509_EXTENSION_value(sk,lastpos);

		if (	((ex->critical > 0) && crit) ||

			((ex->critical <= 0) && !crit))

			return(lastpos);

		}

	return(-1);

	}

EXPORT_C X509_EXTENSION *X509v3_get_ext(const STACK_OF(X509_EXTENSION) *x, int loc)

	{

	if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0)

		return NULL;

	else

		return sk_X509_EXTENSION_value(x,loc);

	}

EXPORT_C X509_EXTENSION *X509v3_delete_ext(STACK_OF(X509_EXTENSION) *x, int loc)

	{

	X509_EXTENSION *ret;

	if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0)

		return(NULL);

	ret=sk_X509_EXTENSION_delete(x,loc);

	return(ret);

	}

EXPORT_C STACK_OF(X509_EXTENSION) *X509v3_add_ext(STACK_OF(X509_EXTENSION) **x,

					 X509_EXTENSION *ex, int loc)

	{

	X509_EXTENSION *new_ex=NULL;

	int n;

	STACK_OF(X509_EXTENSION) *sk=NULL;

	if (x == NULL)

		{

		X509err(X509_F_X509V3_ADD_EXT,ERR_R_PASSED_NULL_PARAMETER);

		goto err2;

		}

	if (*x == NULL)

		{

		if ((sk=sk_X509_EXTENSION_new_null()) == NULL)

			goto err;

		}

	else

		sk= *x;

	n=sk_X509_EXTENSION_num(sk);

	if (loc > n) loc=n;

	else if (loc < 0) loc=n;

	if ((new_ex=X509_EXTENSION_dup(ex)) == NULL)

		goto err2;

	if (!sk_X509_EXTENSION_insert(sk,new_ex,loc))

		goto err;

	if (*x == NULL)

		*x=sk;

	return(sk);

err:

	X509err(X509_F_X509V3_ADD_EXT,ERR_R_MALLOC_FAILURE);

err2:

	if (new_ex != NULL) X509_EXTENSION_free(new_ex);

	if (sk != NULL) sk_X509_EXTENSION_free(sk);

	return(NULL);

	}

EXPORT_C X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex, int nid,

	     int crit, ASN1_OCTET_STRING *data)

	{

	ASN1_OBJECT *obj;

	X509_EXTENSION *ret;

	obj=OBJ_nid2obj(nid);

	if (obj == NULL)

		{

		X509err(X509_F_X509_EXTENSION_CREATE_BY_NID,X509_R_UNKNOWN_NID);

		return(NULL);

		}

	ret=X509_EXTENSION_create_by_OBJ(ex,obj,crit,data);

	if (ret == NULL) ASN1_OBJECT_free(obj);

	return(ret);

	}

EXPORT_C X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,

	     ASN1_OBJECT *obj, int crit, ASN1_OCTET_STRING *data)

	{

	X509_EXTENSION *ret;

	if ((ex == NULL) || (*ex == NULL))

		{

		if ((ret=X509_EXTENSION_new()) == NULL)

			{

			X509err(X509_F_X509_EXTENSION_CREATE_BY_OBJ,ERR_R_MALLOC_FAILURE);

			return(NULL);

			}

		}

	else

		ret= *ex;

	if (!X509_EXTENSION_set_object(ret,obj))

		goto err;

	if (!X509_EXTENSION_set_critical(ret,crit))

		goto err;

	if (!X509_EXTENSION_set_data(ret,data))

		goto err;

	if ((ex != NULL) && (*ex == NULL)) *ex=ret;

	return(ret);

err:

	if ((ex == NULL) || (ret != *ex))

		X509_EXTENSION_free(ret);

	return(NULL);

	}

EXPORT_C int X509_EXTENSION_set_object(X509_EXTENSION *ex, ASN1_OBJECT *obj)

	{

	if ((ex == NULL) || (obj == NULL))

		return(0);

	ASN1_OBJECT_free(ex->object);

	ex->object=OBJ_dup(obj);

	return(1);

	}

EXPORT_C int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit)

	{

	if (ex == NULL) return(0);

	ex->critical=(crit)?0xFF:-1;

	return(1);

	}

EXPORT_C int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data)

	{

	int i;

	if (ex == NULL) return(0);

	i=M_ASN1_OCTET_STRING_set(ex->value,data->data,data->length);

	if (!i) return(0);

	return(1);

	}

EXPORT_C ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex)

	{

	if (ex == NULL) return(NULL);

	return(ex->object);

	}

EXPORT_C ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ex)

	{

	if (ex == NULL) return(NULL);

	return(ex->value);

	}

EXPORT_C int X509_EXTENSION_get_critical(X509_EXTENSION *ex)

	{

	if (ex == NULL) return(0);

	if(ex->critical > 0) return 1;

	return 0;

	}