/*
* 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;
}