GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/x509v3/pcy_cache.c Lines: 2 91 2.2 %
Date: 2017-11-13 Branches: 1 72 1.4 %

Line Branch Exec Source
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/* $OpenBSD: pcy_cache.c,v 1.5 2014/07/11 08:44:49 jsing Exp $ */
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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 * project 2004.
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 */
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/* ====================================================================
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 * Copyright (c) 2004 The OpenSSL Project.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 *
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in
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 *    the documentation and/or other materials provided with the
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 *    distribution.
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 *
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 * 3. All advertising materials mentioning features or use of this
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 *    software must display the following acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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 *
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 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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 *    endorse or promote products derived from this software without
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 *    prior written permission. For written permission, please contact
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 *    licensing@OpenSSL.org.
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 *
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 * 5. Products derived from this software may not be called "OpenSSL"
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 *    nor may "OpenSSL" appear in their names without prior written
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 *    permission of the OpenSSL Project.
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 *
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 * 6. Redistributions of any form whatsoever must retain the following
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 *    acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 * OF THE POSSIBILITY OF SUCH DAMAGE.
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 * ====================================================================
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 *
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 * This product includes cryptographic software written by Eric Young
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 * (eay@cryptsoft.com).  This product includes software written by Tim
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 * Hudson (tjh@cryptsoft.com).
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 *
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 */
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#include <openssl/x509.h>
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#include <openssl/x509v3.h>
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#include "pcy_int.h"
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static int policy_data_cmp(const X509_POLICY_DATA * const *a,
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    const X509_POLICY_DATA * const *b);
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static int policy_cache_set_int(long *out, ASN1_INTEGER *value);
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/* Set cache entry according to CertificatePolicies extension.
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 * Note: this destroys the passed CERTIFICATEPOLICIES structure.
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 */
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static int
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policy_cache_create(X509 *x, CERTIFICATEPOLICIES *policies, int crit)
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{
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	int i;
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	int ret = 0;
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	X509_POLICY_CACHE *cache = x->policy_cache;
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	X509_POLICY_DATA *data = NULL;
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	POLICYINFO *policy;
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	if (sk_POLICYINFO_num(policies) == 0)
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		goto bad_policy;
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	cache->data = sk_X509_POLICY_DATA_new(policy_data_cmp);
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	if (!cache->data)
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		goto bad_policy;
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	for (i = 0; i < sk_POLICYINFO_num(policies); i++) {
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		policy = sk_POLICYINFO_value(policies, i);
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		data = policy_data_new(policy, NULL, crit);
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		if (!data)
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			goto bad_policy;
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		/* Duplicate policy OIDs are illegal: reject if matches
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		 * found.
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		 */
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		if (OBJ_obj2nid(data->valid_policy) == NID_any_policy) {
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			if (cache->anyPolicy) {
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				ret = -1;
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				goto bad_policy;
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			}
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			cache->anyPolicy = data;
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		} else if (sk_X509_POLICY_DATA_find(cache->data, data) != -1) {
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			ret = -1;
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			goto bad_policy;
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		} else if (!sk_X509_POLICY_DATA_push(cache->data, data))
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			goto bad_policy;
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		data = NULL;
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	}
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	ret = 1;
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bad_policy:
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	if (ret == -1)
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		x->ex_flags |= EXFLAG_INVALID_POLICY;
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	if (data)
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		policy_data_free(data);
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	sk_POLICYINFO_pop_free(policies, POLICYINFO_free);
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	if (ret <= 0) {
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		sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free);
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		cache->data = NULL;
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	}
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	return ret;
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}
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static int
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policy_cache_new(X509 *x)
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{
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	X509_POLICY_CACHE *cache;
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	ASN1_INTEGER *ext_any = NULL;
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	POLICY_CONSTRAINTS *ext_pcons = NULL;
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	CERTIFICATEPOLICIES *ext_cpols = NULL;
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	POLICY_MAPPINGS *ext_pmaps = NULL;
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	int i;
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	cache = malloc(sizeof(X509_POLICY_CACHE));
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	if (!cache)
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		return 0;
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	cache->anyPolicy = NULL;
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	cache->data = NULL;
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	cache->any_skip = -1;
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	cache->explicit_skip = -1;
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	cache->map_skip = -1;
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	x->policy_cache = cache;
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	/* Handle requireExplicitPolicy *first*. Need to process this
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	 * even if we don't have any policies.
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	 */
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	ext_pcons = X509_get_ext_d2i(x, NID_policy_constraints, &i, NULL);
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	if (!ext_pcons) {
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		if (i != -1)
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			goto bad_cache;
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	} else {
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		if (!ext_pcons->requireExplicitPolicy &&
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		    !ext_pcons->inhibitPolicyMapping)
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			goto bad_cache;
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		if (!policy_cache_set_int(&cache->explicit_skip,
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		    ext_pcons->requireExplicitPolicy))
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			goto bad_cache;
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		if (!policy_cache_set_int(&cache->map_skip,
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		    ext_pcons->inhibitPolicyMapping))
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			goto bad_cache;
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	}
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	/* Process CertificatePolicies */
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	ext_cpols = X509_get_ext_d2i(x, NID_certificate_policies, &i, NULL);
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	/* If no CertificatePolicies extension or problem decoding then
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	 * there is no point continuing because the valid policies will be
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	 * NULL.
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	 */
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	if (!ext_cpols) {
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		/* If not absent some problem with extension */
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		if (i != -1)
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			goto bad_cache;
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		return 1;
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	}
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	i = policy_cache_create(x, ext_cpols, i);
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	/* NB: ext_cpols freed by policy_cache_set_policies */
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	if (i <= 0)
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		return i;
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	ext_pmaps = X509_get_ext_d2i(x, NID_policy_mappings, &i, NULL);
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	if (!ext_pmaps) {
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		/* If not absent some problem with extension */
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		if (i != -1)
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			goto bad_cache;
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	} else {
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		i = policy_cache_set_mapping(x, ext_pmaps);
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		if (i <= 0)
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			goto bad_cache;
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	}
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	ext_any = X509_get_ext_d2i(x, NID_inhibit_any_policy, &i, NULL);
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	if (!ext_any) {
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		if (i != -1)
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			goto bad_cache;
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	} else if (!policy_cache_set_int(&cache->any_skip, ext_any))
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		goto bad_cache;
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	if (0) {
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bad_cache:
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		x->ex_flags |= EXFLAG_INVALID_POLICY;
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	}
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	if (ext_pcons)
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		POLICY_CONSTRAINTS_free(ext_pcons);
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	if (ext_any)
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		ASN1_INTEGER_free(ext_any);
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	return 1;
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}
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void
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policy_cache_free(X509_POLICY_CACHE *cache)
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{
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	if (!cache)
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		return;
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	if (cache->anyPolicy)
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		policy_data_free(cache->anyPolicy);
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	if (cache->data)
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		sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free);
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	free(cache);
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}
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const X509_POLICY_CACHE *
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policy_cache_set(X509 *x)
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{
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	if (x->policy_cache == NULL) {
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		CRYPTO_w_lock(CRYPTO_LOCK_X509);
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		policy_cache_new(x);
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		CRYPTO_w_unlock(CRYPTO_LOCK_X509);
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	}
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	return x->policy_cache;
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}
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X509_POLICY_DATA *
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policy_cache_find_data(const X509_POLICY_CACHE *cache, const ASN1_OBJECT *id)
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{
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	int idx;
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	X509_POLICY_DATA tmp;
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	tmp.valid_policy = (ASN1_OBJECT *)id;
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	idx = sk_X509_POLICY_DATA_find(cache->data, &tmp);
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	if (idx == -1)
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		return NULL;
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	return sk_X509_POLICY_DATA_value(cache->data, idx);
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}
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static int
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policy_data_cmp(const X509_POLICY_DATA * const *a,
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    const X509_POLICY_DATA * const *b)
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{
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	return OBJ_cmp((*a)->valid_policy, (*b)->valid_policy);
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}
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static int
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policy_cache_set_int(long *out, ASN1_INTEGER *value)
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{
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	if (value == NULL)
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		return 1;
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	if (value->type == V_ASN1_NEG_INTEGER)
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		return 0;
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	*out = ASN1_INTEGER_get(value);
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	return 1;
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}