--- /dev/null
+/*
+ * 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 <openssl/mem.h>
+#include <openssl/obj.h>
+#include <openssl/thread.h>
+#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+
+#include "pcy_int.h"
+#include "../internal.h"
+
+static int policy_data_cmp(const X509_POLICY_DATA **a,
+ const X509_POLICY_DATA **b);
+static int policy_cache_set_int(long *out, ASN1_INTEGER *value);
+
+/*
+ * Set cache entry according to CertificatePolicies extension. Note: this
+ * destroys the passed CERTIFICATEPOLICIES structure.
+ */
+
+static int policy_cache_create(X509 *x,
+ CERTIFICATEPOLICIES *policies, int crit)
+{
+ size_t i;
+ int ret = 0;
+ X509_POLICY_CACHE *cache = x->policy_cache;
+ X509_POLICY_DATA *data = NULL;
+ POLICYINFO *policy;
+ if (sk_POLICYINFO_num(policies) == 0)
+ goto bad_policy;
+ cache->data = sk_X509_POLICY_DATA_new(policy_data_cmp);
+ if (!cache->data)
+ goto bad_policy;
+ for (i = 0; i < sk_POLICYINFO_num(policies); i++) {
+ policy = sk_POLICYINFO_value(policies, i);
+ data = policy_data_new(policy, NULL, crit);
+ if (!data)
+ goto bad_policy;
+ /*
+ * Duplicate policy OIDs are illegal: reject if matches found.
+ */
+ if (OBJ_obj2nid(data->valid_policy) == NID_any_policy) {
+ if (cache->anyPolicy) {
+ ret = -1;
+ goto bad_policy;
+ }
+ cache->anyPolicy = data;
+ } else if (sk_X509_POLICY_DATA_find(cache->data, NULL, data)) {
+ ret = -1;
+ goto bad_policy;
+ } else if (!sk_X509_POLICY_DATA_push(cache->data, data))
+ goto bad_policy;
+ data = NULL;
+ }
+ ret = 1;
+ bad_policy:
+ if (ret == -1)
+ x->ex_flags |= EXFLAG_INVALID_POLICY;
+ if (data)
+ policy_data_free(data);
+ sk_POLICYINFO_pop_free(policies, POLICYINFO_free);
+ if (ret <= 0) {
+ sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free);
+ cache->data = NULL;
+ }
+ return ret;
+}
+
+static int policy_cache_new(X509 *x)
+{
+ X509_POLICY_CACHE *cache;
+ ASN1_INTEGER *ext_any = NULL;
+ POLICY_CONSTRAINTS *ext_pcons = NULL;
+ CERTIFICATEPOLICIES *ext_cpols = NULL;
+ POLICY_MAPPINGS *ext_pmaps = NULL;
+ int i;
+ cache = OPENSSL_malloc(sizeof(X509_POLICY_CACHE));
+ if (!cache)
+ return 0;
+ cache->anyPolicy = NULL;
+ cache->data = NULL;
+ cache->any_skip = -1;
+ cache->explicit_skip = -1;
+ cache->map_skip = -1;
+
+ x->policy_cache = cache;
+
+ /*
+ * Handle requireExplicitPolicy *first*. Need to process this even if we
+ * don't have any policies.
+ */
+ ext_pcons = X509_get_ext_d2i(x, NID_policy_constraints, &i, NULL);
+
+ if (!ext_pcons) {
+ if (i != -1)
+ goto bad_cache;
+ } else {
+ if (!ext_pcons->requireExplicitPolicy
+ && !ext_pcons->inhibitPolicyMapping)
+ goto bad_cache;
+ if (!policy_cache_set_int(&cache->explicit_skip,
+ ext_pcons->requireExplicitPolicy))
+ goto bad_cache;
+ if (!policy_cache_set_int(&cache->map_skip,
+ ext_pcons->inhibitPolicyMapping))
+ goto bad_cache;
+ }
+
+ /* Process CertificatePolicies */
+
+ ext_cpols = X509_get_ext_d2i(x, NID_certificate_policies, &i, NULL);
+ /*
+ * If no CertificatePolicies extension or problem decoding then there is
+ * no point continuing because the valid policies will be NULL.
+ */
+ if (!ext_cpols) {
+ /* If not absent some problem with extension */
+ if (i != -1)
+ goto bad_cache;
+ return 1;
+ }
+
+ i = policy_cache_create(x, ext_cpols, i);
+
+ /* NB: ext_cpols freed by policy_cache_set_policies */
+
+ if (i <= 0)
+ return i;
+
+ ext_pmaps = X509_get_ext_d2i(x, NID_policy_mappings, &i, NULL);
+
+ if (!ext_pmaps) {
+ /* If not absent some problem with extension */
+ if (i != -1)
+ goto bad_cache;
+ } else {
+ i = policy_cache_set_mapping(x, ext_pmaps);
+ if (i <= 0)
+ goto bad_cache;
+ }
+
+ ext_any = X509_get_ext_d2i(x, NID_inhibit_any_policy, &i, NULL);
+
+ if (!ext_any) {
+ if (i != -1)
+ goto bad_cache;
+ } else if (!policy_cache_set_int(&cache->any_skip, ext_any))
+ goto bad_cache;
+
+ if (0) {
+ bad_cache:
+ x->ex_flags |= EXFLAG_INVALID_POLICY;
+ }
+
+ if (ext_pcons)
+ POLICY_CONSTRAINTS_free(ext_pcons);
+
+ if (ext_any)
+ ASN1_INTEGER_free(ext_any);
+
+ return 1;
+
+}
+
+void policy_cache_free(X509_POLICY_CACHE *cache)
+{
+ if (!cache)
+ return;
+ if (cache->anyPolicy)
+ policy_data_free(cache->anyPolicy);
+ if (cache->data)
+ sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free);
+ OPENSSL_free(cache);
+}
+
+/*
+ * g_x509_policy_cache_lock is used to protect against concurrent calls to
+ * |policy_cache_new|. Ideally this would be done with a |CRYPTO_once_t| in
+ * the |X509| structure, but |CRYPTO_once_t| isn't public.
+ */
+static struct CRYPTO_STATIC_MUTEX g_x509_policy_cache_lock =
+ CRYPTO_STATIC_MUTEX_INIT;
+
+const X509_POLICY_CACHE *policy_cache_set(X509 *x)
+{
+ X509_POLICY_CACHE *cache;
+
+ CRYPTO_STATIC_MUTEX_lock_read(&g_x509_policy_cache_lock);
+ cache = x->policy_cache;
+ CRYPTO_STATIC_MUTEX_unlock_read(&g_x509_policy_cache_lock);
+
+ if (cache != NULL)
+ return cache;
+
+ CRYPTO_STATIC_MUTEX_lock_write(&g_x509_policy_cache_lock);
+ if (x->policy_cache == NULL)
+ policy_cache_new(x);
+ cache = x->policy_cache;
+ CRYPTO_STATIC_MUTEX_unlock_write(&g_x509_policy_cache_lock);
+
+ return cache;
+}
+
+X509_POLICY_DATA *policy_cache_find_data(const X509_POLICY_CACHE *cache,
+ const ASN1_OBJECT *id)
+{
+ size_t idx;
+ X509_POLICY_DATA tmp;
+
+ tmp.valid_policy = (ASN1_OBJECT *)id;
+ if (!sk_X509_POLICY_DATA_find(cache->data, &idx, &tmp))
+ return NULL;
+ return sk_X509_POLICY_DATA_value(cache->data, idx);
+}
+
+static int policy_data_cmp(const X509_POLICY_DATA **a,
+ const X509_POLICY_DATA **b)
+{
+ return OBJ_cmp((*a)->valid_policy, (*b)->valid_policy);
+}
+
+static int policy_cache_set_int(long *out, ASN1_INTEGER *value)
+{
+ if (value == NULL)
+ return 1;
+ if (value->type == V_ASN1_NEG_INTEGER)
+ return 0;
+ *out = ASN1_INTEGER_get(value);
+ return 1;
+}
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