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286 lines
9 KiB
C
286 lines
9 KiB
C
/*
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* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
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* 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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#include <openssl/mem.h>
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#include <openssl/obj.h>
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#include <openssl/thread.h>
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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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#include "../internal.h"
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static int policy_data_cmp(const X509_POLICY_DATA **a,
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const X509_POLICY_DATA **b);
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static int policy_cache_set_int(long *out, ASN1_INTEGER *value);
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/*
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* Set cache entry according to CertificatePolicies extension. Note: this
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* destroys the passed CERTIFICATEPOLICIES structure.
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*/
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static int policy_cache_create(X509 *x,
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CERTIFICATEPOLICIES *policies, int crit)
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{
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size_t 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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/*
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* Duplicate policy OIDs are illegal: reject if matches found.
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*/
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sk_X509_POLICY_DATA_sort(cache->data);
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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, NULL, data)) {
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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 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 = OPENSSL_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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/*
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* Handle requireExplicitPolicy *first*. Need to process this even if we
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* 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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/*
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* If no CertificatePolicies extension or problem decoding then there is
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* no point continuing because the valid policies will be 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 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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OPENSSL_free(cache);
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}
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/*
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* g_x509_policy_cache_lock is used to protect against concurrent calls to
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* |policy_cache_new|. Ideally this would be done with a |CRYPTO_once_t| in
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* the |X509| structure, but |CRYPTO_once_t| isn't public.
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*/
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static struct CRYPTO_STATIC_MUTEX g_x509_policy_cache_lock =
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CRYPTO_STATIC_MUTEX_INIT;
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const X509_POLICY_CACHE *policy_cache_set(X509 *x)
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{
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X509_POLICY_CACHE *cache;
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CRYPTO_STATIC_MUTEX_lock_read(&g_x509_policy_cache_lock);
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cache = x->policy_cache;
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CRYPTO_STATIC_MUTEX_unlock_read(&g_x509_policy_cache_lock);
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if (cache != NULL)
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return cache;
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CRYPTO_STATIC_MUTEX_lock_write(&g_x509_policy_cache_lock);
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if (x->policy_cache == NULL)
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policy_cache_new(x);
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cache = x->policy_cache;
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CRYPTO_STATIC_MUTEX_unlock_write(&g_x509_policy_cache_lock);
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return cache;
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}
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X509_POLICY_DATA *policy_cache_find_data(const X509_POLICY_CACHE *cache,
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const ASN1_OBJECT *id)
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{
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size_t idx;
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X509_POLICY_DATA tmp;
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tmp.valid_policy = (ASN1_OBJECT *)id;
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sk_X509_POLICY_DATA_sort(cache->data);
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if (!sk_X509_POLICY_DATA_find(cache->data, &idx, &tmp))
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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 policy_data_cmp(const X509_POLICY_DATA **a,
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const X509_POLICY_DATA **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 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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}
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