/* 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;

	}