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- /*
- * Copyright 2004-2023 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
- #include <openssl/asn1.h>
- #include <openssl/x509.h>
- #include <openssl/x509v3.h>
- #include <openssl/err.h>
- #include "pcy_local.h"
- static int node_cmp(const X509_POLICY_NODE *const *a,
- const X509_POLICY_NODE *const *b)
- {
- return OBJ_cmp((*a)->data->valid_policy, (*b)->data->valid_policy);
- }
- STACK_OF(X509_POLICY_NODE) *ossl_policy_node_cmp_new(void)
- {
- return sk_X509_POLICY_NODE_new(node_cmp);
- }
- X509_POLICY_NODE *ossl_policy_tree_find_sk(STACK_OF(X509_POLICY_NODE) *nodes,
- const ASN1_OBJECT *id)
- {
- X509_POLICY_DATA n;
- X509_POLICY_NODE l;
- int idx;
- n.valid_policy = (ASN1_OBJECT *)id;
- l.data = &n;
- idx = sk_X509_POLICY_NODE_find(nodes, &l);
- return sk_X509_POLICY_NODE_value(nodes, idx);
- }
- X509_POLICY_NODE *ossl_policy_level_find_node(const X509_POLICY_LEVEL *level,
- const X509_POLICY_NODE *parent,
- const ASN1_OBJECT *id)
- {
- X509_POLICY_NODE *node;
- int i;
- for (i = 0; i < sk_X509_POLICY_NODE_num(level->nodes); i++) {
- node = sk_X509_POLICY_NODE_value(level->nodes, i);
- if (node->parent == parent) {
- if (!OBJ_cmp(node->data->valid_policy, id))
- return node;
- }
- }
- return NULL;
- }
- X509_POLICY_NODE *ossl_policy_level_add_node(X509_POLICY_LEVEL *level,
- X509_POLICY_DATA *data,
- X509_POLICY_NODE *parent,
- X509_POLICY_TREE *tree,
- int extra_data)
- {
- X509_POLICY_NODE *node;
- /* Verify that the tree isn't too large. This mitigates CVE-2023-0464 */
- if (tree->node_maximum > 0 && tree->node_count >= tree->node_maximum)
- return NULL;
- node = OPENSSL_zalloc(sizeof(*node));
- if (node == NULL)
- return NULL;
- node->data = data;
- node->parent = parent;
- if (level != NULL) {
- if (OBJ_obj2nid(data->valid_policy) == NID_any_policy) {
- if (level->anyPolicy)
- goto node_error;
- level->anyPolicy = node;
- } else {
- if (level->nodes == NULL)
- level->nodes = ossl_policy_node_cmp_new();
- if (level->nodes == NULL) {
- ERR_raise(ERR_LIB_X509V3, ERR_R_X509_LIB);
- goto node_error;
- }
- if (!sk_X509_POLICY_NODE_push(level->nodes, node)) {
- ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
- goto node_error;
- }
- }
- }
- if (extra_data) {
- if (tree->extra_data == NULL)
- tree->extra_data = sk_X509_POLICY_DATA_new_null();
- if (tree->extra_data == NULL) {
- ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
- goto extra_data_error;
- }
- if (!sk_X509_POLICY_DATA_push(tree->extra_data, data)) {
- ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
- goto extra_data_error;
- }
- }
- tree->node_count++;
- if (parent)
- parent->nchild++;
- return node;
- extra_data_error:
- if (level != NULL) {
- if (level->anyPolicy == node)
- level->anyPolicy = NULL;
- else
- (void) sk_X509_POLICY_NODE_pop(level->nodes);
- }
- node_error:
- ossl_policy_node_free(node);
- return NULL;
- }
- void ossl_policy_node_free(X509_POLICY_NODE *node)
- {
- OPENSSL_free(node);
- }
- /*
- * See if a policy node matches a policy OID. If mapping enabled look through
- * expected policy set otherwise just valid policy.
- */
- int ossl_policy_node_match(const X509_POLICY_LEVEL *lvl,
- const X509_POLICY_NODE *node, const ASN1_OBJECT *oid)
- {
- int i;
- ASN1_OBJECT *policy_oid;
- const X509_POLICY_DATA *x = node->data;
- if ((lvl->flags & X509_V_FLAG_INHIBIT_MAP)
- || !(x->flags & POLICY_DATA_FLAG_MAP_MASK)) {
- if (!OBJ_cmp(x->valid_policy, oid))
- return 1;
- return 0;
- }
- for (i = 0; i < sk_ASN1_OBJECT_num(x->expected_policy_set); i++) {
- policy_oid = sk_ASN1_OBJECT_value(x->expected_policy_set, i);
- if (!OBJ_cmp(policy_oid, oid))
- return 1;
- }
- return 0;
- }
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