/* v3_lib.c */

/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL

 * project 1999.

 */

/* ====================================================================

 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.

 *

 * 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 above 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 acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    licensing@OpenSSL.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED 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 OpenSSL PROJECT OR

 * ITS 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.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

 /*

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

 */

/* X509 v3 extension utilities */

#include <stdio.h>

#include "cryptlib.h"

#include <openssl/conf.h>

#include <openssl/x509v3.h>

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

#include "libcrypto_wsd_macros.h"

#include "libcrypto_wsd.h"

#endif

#include "ext_dat.h"

#ifndef EMULATOR

static STACK_OF(X509V3_EXT_METHOD) *ext_list = NULL;

#else

GET_STATIC_VAR_FROM_TLS(ext_list,v3_lib,STACK_OF(X509V3_EXT_METHOD) *)

#define ext_list (*GET_WSD_VAR_NAME(ext_list,v3_lib, s)())

#endif

static int ext_cmp(const X509V3_EXT_METHOD * const *a,

		const X509V3_EXT_METHOD * const *b);

static void ext_list_free(X509V3_EXT_METHOD *ext);

EXPORT_C int X509V3_EXT_add(X509V3_EXT_METHOD *ext)

{

	if(!ext_list && !(ext_list = sk_X509V3_EXT_METHOD_new(ext_cmp))) {

		X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE);

		return 0;

	}

	if(!sk_X509V3_EXT_METHOD_push(ext_list, ext)) {

		X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE);

		return 0;

	}

	return 1;

}

static int ext_cmp(const X509V3_EXT_METHOD * const *a,

		const X509V3_EXT_METHOD * const *b)

{

	return ((*a)->ext_nid - (*b)->ext_nid);

}

EXPORT_C X509V3_EXT_METHOD *X509V3_EXT_get_nid(int nid)

{

	X509V3_EXT_METHOD tmp, *t = &tmp, **ret;

	int idx;

	if(nid < 0) return NULL;

	tmp.ext_nid = nid;

	ret = (X509V3_EXT_METHOD **) OBJ_bsearch((char *)&t,

			(char *)standard_exts, STANDARD_EXTENSION_COUNT,

			sizeof(X509V3_EXT_METHOD *), (int (*)(const void *, const void *))ext_cmp);

	if(ret) return *ret;

	if(!ext_list) return NULL;

	idx = sk_X509V3_EXT_METHOD_find(ext_list, &tmp);

	if(idx == -1) return NULL;

	return sk_X509V3_EXT_METHOD_value(ext_list, idx);

}

EXPORT_C X509V3_EXT_METHOD *X509V3_EXT_get(X509_EXTENSION *ext)

{

	int nid;

	if((nid = OBJ_obj2nid(ext->object)) == NID_undef) return NULL;

	return X509V3_EXT_get_nid(nid);

}

EXPORT_C int X509V3_EXT_add_list(X509V3_EXT_METHOD *extlist)

{

	for(;extlist->ext_nid!=-1;extlist++) 

			if(!X509V3_EXT_add(extlist)) return 0;

	return 1;

}

EXPORT_C int X509V3_EXT_add_alias(int nid_to, int nid_from)

{

	X509V3_EXT_METHOD *ext, *tmpext;

	if(!(ext = X509V3_EXT_get_nid(nid_from))) {

		X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,X509V3_R_EXTENSION_NOT_FOUND);

		return 0;

	}

	if(!(tmpext = (X509V3_EXT_METHOD *)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD)))) {

		X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,ERR_R_MALLOC_FAILURE);

		return 0;

	}

	*tmpext = *ext;

	tmpext->ext_nid = nid_to;

	tmpext->ext_flags |= X509V3_EXT_DYNAMIC;

	return X509V3_EXT_add(tmpext);

}

EXPORT_C void X509V3_EXT_cleanup(void)

{

	sk_X509V3_EXT_METHOD_pop_free(ext_list, ext_list_free);

	ext_list = NULL;

}

static void ext_list_free(X509V3_EXT_METHOD *ext)

{

	if(ext->ext_flags & X509V3_EXT_DYNAMIC) OPENSSL_free(ext);

}

/* Legacy function: we don't need to add standard extensions

 * any more because they are now kept in ext_dat.h.

 */

EXPORT_C int X509V3_add_standard_extensions(void)

{

	return 1;

}

/* Return an extension internal structure */

EXPORT_C void *X509V3_EXT_d2i(X509_EXTENSION *ext)

{

	X509V3_EXT_METHOD *method;

	const unsigned char *p;

	if(!(method = X509V3_EXT_get(ext))) return NULL;

	p = ext->value->data;

	if(method->it) return ASN1_item_d2i(NULL, &p, ext->value->length, ASN1_ITEM_ptr(method->it));

	return method->d2i(NULL, &p, ext->value->length);

}

/* Get critical flag and decoded version of extension from a NID.

 * The "idx" variable returns the last found extension and can

 * be used to retrieve multiple extensions of the same NID.

 * However multiple extensions with the same NID is usually

 * due to a badly encoded certificate so if idx is NULL we

 * choke if multiple extensions exist.

 * The "crit" variable is set to the critical value.

 * The return value is the decoded extension or NULL on

 * error. The actual error can have several different causes,

 * the value of *crit reflects the cause:

 * >= 0, extension found but not decoded (reflects critical value).

 * -1 extension not found.

 * -2 extension occurs more than once.

 */

EXPORT_C void *X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit, int *idx)

{

	int lastpos, i;

	X509_EXTENSION *ex, *found_ex = NULL;

	if(!x) {

		if(idx) *idx = -1;

		if(crit) *crit = -1;

		return NULL;

	}

	if(idx) lastpos = *idx + 1;

	else lastpos = 0;

	if(lastpos < 0) lastpos = 0;

	for(i = lastpos; i < sk_X509_EXTENSION_num(x); i++)

	{

		ex = sk_X509_EXTENSION_value(x, i);

		if(OBJ_obj2nid(ex->object) == nid) {

			if(idx) {

				*idx = i;

				found_ex = ex;

				break;

			} else if(found_ex) {

				/* Found more than one */

				if(crit) *crit = -2;

				return NULL;

			}

			found_ex = ex;

		}

	}

	if(found_ex) {

		/* Found it */

		if(crit) *crit = X509_EXTENSION_get_critical(found_ex);

		return X509V3_EXT_d2i(found_ex);

	}

	/* Extension not found */

	if(idx) *idx = -1;

	if(crit) *crit = -1;

	return NULL;

}

/* This function is a general extension append, replace and delete utility.

 * The precise operation is governed by the 'flags' value. The 'crit' and

 * 'value' arguments (if relevant) are the extensions internal structure.

 */

EXPORT_C int X509V3_add1_i2d(STACK_OF(X509_EXTENSION) **x, int nid, void *value,

					int crit, unsigned long flags)

{

	int extidx = -1;

	int errcode;

	X509_EXTENSION *ext, *extmp;

	unsigned long ext_op = flags & X509V3_ADD_OP_MASK;

	/* If appending we don't care if it exists, otherwise

	 * look for existing extension.

	 */

	if(ext_op != X509V3_ADD_APPEND)

		extidx = X509v3_get_ext_by_NID(*x, nid, -1);

	/* See if extension exists */

	if(extidx >= 0) {

		/* If keep existing, nothing to do */

		if(ext_op == X509V3_ADD_KEEP_EXISTING)

			return 1;

		/* If default then its an error */

		if(ext_op == X509V3_ADD_DEFAULT) {

			errcode = X509V3_R_EXTENSION_EXISTS;

			goto err;

		}

		/* If delete, just delete it */

		if(ext_op == X509V3_ADD_DELETE) {

			if(!sk_X509_EXTENSION_delete(*x, extidx)) return -1;

			return 1;

		}

	} else {

		/* If replace existing or delete, error since 

		 * extension must exist

		 */

		if((ext_op == X509V3_ADD_REPLACE_EXISTING) ||

		   (ext_op == X509V3_ADD_DELETE)) {

			errcode = X509V3_R_EXTENSION_NOT_FOUND;

			goto err;

		}

	}

	/* If we get this far then we have to create an extension:

	 * could have some flags for alternative encoding schemes...

	 */

	ext = X509V3_EXT_i2d(nid, crit, value);

	if(!ext) {

		X509V3err(X509V3_F_X509V3_ADD1_I2D, X509V3_R_ERROR_CREATING_EXTENSION);

		return 0;

	}

	/* If extension exists replace it.. */

	if(extidx >= 0) {

		extmp = sk_X509_EXTENSION_value(*x, extidx);

		X509_EXTENSION_free(extmp);

		if(!sk_X509_EXTENSION_set(*x, extidx, ext)) return -1;

		return 1;

	}

	if(!*x && !(*x = sk_X509_EXTENSION_new_null())) return -1;

	if(!sk_X509_EXTENSION_push(*x, ext)) return -1;

	return 1;

	err:

	if(!(flags & X509V3_ADD_SILENT))

		X509V3err(X509V3_F_X509V3_ADD1_I2D, errcode);

	return 0;

}

IMPLEMENT_STACK_OF(X509V3_EXT_METHOD)