sl@0: /* pcy_cache.c */
sl@0: /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
sl@0:  * project 2004.
sl@0:  */
sl@0: /* ====================================================================
sl@0:  * Copyright (c) 2004 The OpenSSL Project.  All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  *
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer. 
sl@0:  *
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in
sl@0:  *    the documentation and/or other materials provided with the
sl@0:  *    distribution.
sl@0:  *
sl@0:  * 3. All advertising materials mentioning features or use of this
sl@0:  *    software must display the following acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
sl@0:  *
sl@0:  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
sl@0:  *    endorse or promote products derived from this software without
sl@0:  *    prior written permission. For written permission, please contact
sl@0:  *    licensing@OpenSSL.org.
sl@0:  *
sl@0:  * 5. Products derived from this software may not be called "OpenSSL"
sl@0:  *    nor may "OpenSSL" appear in their names without prior written
sl@0:  *    permission of the OpenSSL Project.
sl@0:  *
sl@0:  * 6. Redistributions of any form whatsoever must retain the following
sl@0:  *    acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
sl@0:  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sl@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
sl@0:  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
sl@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
sl@0:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
sl@0:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
sl@0:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
sl@0:  * OF THE POSSIBILITY OF SUCH DAMAGE.
sl@0:  * ====================================================================
sl@0:  *
sl@0:  * This product includes cryptographic software written by Eric Young
sl@0:  * (eay@cryptsoft.com).  This product includes software written by Tim
sl@0:  * Hudson (tjh@cryptsoft.com).
sl@0:  *
sl@0:  */
sl@0: 
sl@0: #include "cryptlib.h"
sl@0: #include <openssl/x509.h>
sl@0: #include <openssl/x509v3.h>
sl@0: 
sl@0: #include "pcy_int.h"
sl@0: 
sl@0: static int policy_data_cmp(const X509_POLICY_DATA * const *a,
sl@0: 				const X509_POLICY_DATA * const *b);
sl@0: static int policy_cache_set_int(long *out, ASN1_INTEGER *value);
sl@0: 
sl@0: /* Set cache entry according to CertificatePolicies extension.
sl@0:  * Note: this destroys the passed CERTIFICATEPOLICIES structure.
sl@0:  */
sl@0: 
sl@0: static int policy_cache_create(X509 *x,
sl@0: 			CERTIFICATEPOLICIES *policies, int crit)
sl@0: 	{
sl@0: 	int i;
sl@0: 	int ret = 0;
sl@0: 	X509_POLICY_CACHE *cache = x->policy_cache;
sl@0: 	X509_POLICY_DATA *data = NULL;
sl@0: 	POLICYINFO *policy;
sl@0: 	if (sk_POLICYINFO_num(policies) == 0)
sl@0: 		goto bad_policy;
sl@0: 	cache->data = sk_X509_POLICY_DATA_new(policy_data_cmp);
sl@0: 	if (!cache->data)
sl@0: 		goto bad_policy;
sl@0: 	for (i = 0; i < sk_POLICYINFO_num(policies); i++)
sl@0: 		{
sl@0: 		policy = sk_POLICYINFO_value(policies, i);
sl@0: 		data = policy_data_new(policy, NULL, crit);
sl@0: 		if (!data)
sl@0: 			goto bad_policy;
sl@0: 		/* Duplicate policy OIDs are illegal: reject if matches
sl@0: 		 * found.
sl@0: 		 */
sl@0: 		if (OBJ_obj2nid(data->valid_policy) == NID_any_policy)
sl@0: 			{
sl@0: 			if (cache->anyPolicy)
sl@0: 				{
sl@0: 				ret = -1;
sl@0: 				goto bad_policy;
sl@0: 				}
sl@0: 			cache->anyPolicy = data;
sl@0: 			}
sl@0: 		else if (sk_X509_POLICY_DATA_find(cache->data, data) != -1)
sl@0: 			{
sl@0: 			ret = -1;
sl@0: 			goto bad_policy;
sl@0: 			}
sl@0: 		else if (!sk_X509_POLICY_DATA_push(cache->data, data))
sl@0: 			goto bad_policy;
sl@0: 		data = NULL;
sl@0: 		}
sl@0: 	ret = 1;
sl@0: 	bad_policy:
sl@0: 	if (ret == -1)
sl@0: 		x->ex_flags |= EXFLAG_INVALID_POLICY;
sl@0: 	if (data)
sl@0: 		policy_data_free(data);
sl@0: 	sk_POLICYINFO_pop_free(policies, POLICYINFO_free);
sl@0: 	if (ret <= 0)
sl@0: 		{
sl@0: 		sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free);
sl@0: 		cache->data = NULL;
sl@0: 		}
sl@0: 	return ret;
sl@0: 	}
sl@0: 
sl@0: 	
sl@0: static int policy_cache_new(X509 *x)
sl@0: 	{
sl@0: 	X509_POLICY_CACHE *cache;
sl@0: 	ASN1_INTEGER *ext_any = NULL;
sl@0: 	POLICY_CONSTRAINTS *ext_pcons = NULL;
sl@0: 	CERTIFICATEPOLICIES *ext_cpols = NULL;
sl@0: 	POLICY_MAPPINGS *ext_pmaps = NULL;
sl@0: 	int i;
sl@0: 	cache = OPENSSL_malloc(sizeof(X509_POLICY_CACHE));
sl@0: 	if (!cache)
sl@0: 		return 0;
sl@0: 	cache->anyPolicy = NULL;
sl@0: 	cache->data = NULL;
sl@0: 	cache->maps = NULL;
sl@0: 	cache->any_skip = -1;
sl@0: 	cache->explicit_skip = -1;
sl@0: 	cache->map_skip = -1;
sl@0: 
sl@0: 	x->policy_cache = cache;
sl@0: 
sl@0: 	/* Handle requireExplicitPolicy *first*. Need to process this
sl@0: 	 * even if we don't have any policies.
sl@0: 	 */
sl@0: 	ext_pcons = X509_get_ext_d2i(x, NID_policy_constraints, &i, NULL);
sl@0: 
sl@0: 	if (!ext_pcons)
sl@0: 		{
sl@0: 		if (i != -1)
sl@0: 			goto bad_cache;
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		if (!ext_pcons->requireExplicitPolicy
sl@0: 			&& !ext_pcons->inhibitPolicyMapping)
sl@0: 			goto bad_cache;
sl@0: 		if (!policy_cache_set_int(&cache->explicit_skip,
sl@0: 			ext_pcons->requireExplicitPolicy))
sl@0: 			goto bad_cache;
sl@0: 		if (!policy_cache_set_int(&cache->map_skip,
sl@0: 			ext_pcons->inhibitPolicyMapping))
sl@0: 			goto bad_cache;
sl@0: 		}
sl@0: 
sl@0: 	/* Process CertificatePolicies */
sl@0: 
sl@0: 	ext_cpols = X509_get_ext_d2i(x, NID_certificate_policies, &i, NULL);
sl@0: 	/* If no CertificatePolicies extension or problem decoding then
sl@0: 	 * there is no point continuing because the valid policies will be
sl@0: 	 * NULL.
sl@0: 	 */
sl@0: 	if (!ext_cpols)
sl@0: 		{
sl@0: 		/* If not absent some problem with extension */
sl@0: 		if (i != -1)
sl@0: 			goto bad_cache;
sl@0: 		return 1;
sl@0: 		}
sl@0: 
sl@0: 	i = policy_cache_create(x, ext_cpols, i);
sl@0: 
sl@0: 	/* NB: ext_cpols freed by policy_cache_set_policies */
sl@0: 
sl@0: 	if (i <= 0)
sl@0: 		return i;
sl@0: 
sl@0: 	ext_pmaps = X509_get_ext_d2i(x, NID_policy_mappings, &i, NULL);
sl@0: 
sl@0: 	if (!ext_pmaps)
sl@0: 		{
sl@0: 		/* If not absent some problem with extension */
sl@0: 		if (i != -1)
sl@0: 			goto bad_cache;
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		i = policy_cache_set_mapping(x, ext_pmaps);
sl@0: 		if (i <= 0)
sl@0: 			goto bad_cache;
sl@0: 		}
sl@0: 
sl@0: 	ext_any = X509_get_ext_d2i(x, NID_inhibit_any_policy, &i, NULL);
sl@0: 
sl@0: 	if (!ext_any)
sl@0: 		{
sl@0: 		if (i != -1)
sl@0: 			goto bad_cache;
sl@0: 		}
sl@0: 	else if (!policy_cache_set_int(&cache->any_skip, ext_any))
sl@0: 			goto bad_cache;
sl@0: 
sl@0: 	if (0)
sl@0: 		{
sl@0: 		bad_cache:
sl@0: 		x->ex_flags |= EXFLAG_INVALID_POLICY;
sl@0: 		}
sl@0: 
sl@0: 	if(ext_pcons)
sl@0: 		POLICY_CONSTRAINTS_free(ext_pcons);
sl@0: 
sl@0: 	if (ext_any)
sl@0: 		ASN1_INTEGER_free(ext_any);
sl@0: 
sl@0: 	return 1;
sl@0: 
sl@0: 	
sl@0: }
sl@0: 
sl@0: EXPORT_C void policy_cache_free(X509_POLICY_CACHE *cache)
sl@0: 	{
sl@0: 	if (!cache)
sl@0: 		return;
sl@0: 	if (cache->anyPolicy)
sl@0: 		policy_data_free(cache->anyPolicy);
sl@0: 	if (cache->data)
sl@0: 		sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free);
sl@0: 	OPENSSL_free(cache);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C const X509_POLICY_CACHE *policy_cache_set(X509 *x)
sl@0: 	{
sl@0: 
sl@0: 	if (x->policy_cache == NULL)
sl@0: 		{
sl@0: 		CRYPTO_w_lock(CRYPTO_LOCK_X509);
sl@0: 			policy_cache_new(x);
sl@0: 		CRYPTO_w_unlock(CRYPTO_LOCK_X509);
sl@0: 		}
sl@0: 
sl@0: 	return x->policy_cache;
sl@0: 
sl@0: 	}
sl@0: 
sl@0: EXPORT_C X509_POLICY_DATA *policy_cache_find_data(const X509_POLICY_CACHE *cache,
sl@0: 						const ASN1_OBJECT *id)
sl@0: 	{
sl@0: 	int idx;
sl@0: 	X509_POLICY_DATA tmp;
sl@0: 	tmp.valid_policy = (ASN1_OBJECT *)id;
sl@0: 	idx = sk_X509_POLICY_DATA_find(cache->data, &tmp);
sl@0: 	if (idx == -1)
sl@0: 		return NULL;
sl@0: 	return sk_X509_POLICY_DATA_value(cache->data, idx);
sl@0: 	}
sl@0: 
sl@0: static int policy_data_cmp(const X509_POLICY_DATA * const *a,
sl@0: 				const X509_POLICY_DATA * const *b)
sl@0: 	{
sl@0: 	return OBJ_cmp((*a)->valid_policy, (*b)->valid_policy);
sl@0: 	}
sl@0: 
sl@0: static int policy_cache_set_int(long *out, ASN1_INTEGER *value)
sl@0: 	{
sl@0: 	if (value == NULL)
sl@0: 		return 1;
sl@0: 	if (value->type == V_ASN1_NEG_INTEGER)
sl@0: 		return 0;
sl@0: 	*out = ASN1_INTEGER_get(value);
sl@0: 	return 1;
sl@0: 	}