/* pcy_map.c */

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

  * project 2004.

  */

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

  * Copyright (c) 2004 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).

  *

  */

 #include "cryptlib.h"

 #include <openssl/x509.h>

 #include <openssl/x509v3.h>

 #include "pcy_int.h"

 static int ref_cmp(const X509_POLICY_REF * const *a,

 			const X509_POLICY_REF * const *b)

 	{

 	return OBJ_cmp((*a)->subjectDomainPolicy, (*b)->subjectDomainPolicy);

 	}

 static void policy_map_free(X509_POLICY_REF *map)

 	{

 	if (map->subjectDomainPolicy)

 		ASN1_OBJECT_free(map->subjectDomainPolicy);

 	OPENSSL_free(map);

 	}

 static X509_POLICY_REF *policy_map_find(X509_POLICY_CACHE *cache, ASN1_OBJECT *id)

 	{

 	X509_POLICY_REF tmp;

 	int idx;

 	tmp.subjectDomainPolicy = id;

 	idx = sk_X509_POLICY_REF_find(cache->maps, &tmp);

 	if (idx == -1)

 		return NULL;

 	return sk_X509_POLICY_REF_value(cache->maps, idx);

 	}

 /* Set policy mapping entries in cache.

  * Note: this modifies the passed POLICY_MAPPINGS structure

  */

 EXPORT_C int policy_cache_set_mapping(X509 *x, POLICY_MAPPINGS *maps)

 	{

 	POLICY_MAPPING *map;

 	X509_POLICY_REF *ref = NULL;

 	X509_POLICY_DATA *data;

 	X509_POLICY_CACHE *cache = x->policy_cache;

 	int i;

 	int ret = 0;

 	if (sk_POLICY_MAPPING_num(maps) == 0)

 		{

 		ret = -1;

 		goto bad_mapping;

 		}

 	cache->maps = sk_X509_POLICY_REF_new(ref_cmp);

 	for (i = 0; i < sk_POLICY_MAPPING_num(maps); i++)

 		{

 		map = sk_POLICY_MAPPING_value(maps, i);

 		/* Reject if map to or from anyPolicy */

 		if ((OBJ_obj2nid(map->subjectDomainPolicy) == NID_any_policy)

 		   || (OBJ_obj2nid(map->issuerDomainPolicy) == NID_any_policy))

 			{

 			ret = -1;

 			goto bad_mapping;

 			}

 		/* If we've already mapped from this OID bad mapping */

 		if (policy_map_find(cache, map->subjectDomainPolicy) != NULL)

 			{

 			ret = -1;

 			goto bad_mapping;

 			}

 		/* Attempt to find matching policy data */

 		data = policy_cache_find_data(cache, map->issuerDomainPolicy);

 		/* If we don't have anyPolicy can't map */

 		if (!data && !cache->anyPolicy)

 			continue;

 		/* Create a NODE from anyPolicy */

 		if (!data)

 			{

 			data = policy_data_new(NULL, map->issuerDomainPolicy,

 					cache->anyPolicy->flags

 						& POLICY_DATA_FLAG_CRITICAL);

 			if (!data)

 				goto bad_mapping;

 			data->qualifier_set = cache->anyPolicy->qualifier_set;

 			map->issuerDomainPolicy = NULL;

 			data->flags |= POLICY_DATA_FLAG_MAPPED_ANY;

 			data->flags |= POLICY_DATA_FLAG_SHARED_QUALIFIERS;

 			if (!sk_X509_POLICY_DATA_push(cache->data, data))

 				{

 				policy_data_free(data);

 				goto bad_mapping;

 				}

 			}

 		else

 			data->flags |= POLICY_DATA_FLAG_MAPPED;

 		if (!sk_ASN1_OBJECT_push(data->expected_policy_set, 

 						map->subjectDomainPolicy))

 			goto bad_mapping;

 		ref = OPENSSL_malloc(sizeof(X509_POLICY_REF));

 		if (!ref)

 			goto bad_mapping;

 		ref->subjectDomainPolicy = map->subjectDomainPolicy;

 		map->subjectDomainPolicy = NULL;

 		ref->data = data;

 		if (!sk_X509_POLICY_REF_push(cache->maps, ref))

 			goto bad_mapping;

 		ref = NULL;

 		}

 	ret = 1;

 	bad_mapping:

 	if (ret == -1)

 		x->ex_flags |= EXFLAG_INVALID_POLICY;

 	if (ref)

 		policy_map_free(ref);

 	if (ret <= 0)

 		{

 		sk_X509_POLICY_REF_pop_free(cache->maps, policy_map_free);

 		cache->maps = NULL;

 		}

 	sk_POLICY_MAPPING_pop_free(maps, POLICY_MAPPING_free);

 	return ret;

 	}