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/* pcy_map.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) 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)
	{
	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
 */

int policy_cache_set_mapping(X509 *x, POLICY_MAPPINGS *maps)
	{
	POLICY_MAPPING *map;
	X509_POLICY_REF *ref = NULL;
	ASN1_OBJECT *subjectDomainPolicyRef;
	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;
                /* map->subjectDomainPolicy will be freed when
                 * cache->data is freed. Set it to NULL to avoid double-free. */
                subjectDomainPolicyRef = map->subjectDomainPolicy;
                map->subjectDomainPolicy = NULL;
		
		ref = OPENSSL_malloc(sizeof(X509_POLICY_REF));
		if (!ref)
			goto bad_mapping;

		ref->subjectDomainPolicy = subjectDomainPolicyRef;
		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;

	}