/* 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)