1 /*
2 * Copyright 2004-2023 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <openssl/asn1.h>
11 #include <openssl/x509.h>
12 #include <openssl/x509v3.h>
13 #include <openssl/err.h>
14
15 #include "pcy_local.h"
16
node_cmp(const X509_POLICY_NODE * const * a,const X509_POLICY_NODE * const * b)17 static int node_cmp(const X509_POLICY_NODE *const *a,
18 const X509_POLICY_NODE *const *b)
19 {
20 return OBJ_cmp((*a)->data->valid_policy, (*b)->data->valid_policy);
21 }
22
STACK_OF(X509_POLICY_NODE)23 STACK_OF(X509_POLICY_NODE) *ossl_policy_node_cmp_new(void)
24 {
25 return sk_X509_POLICY_NODE_new(node_cmp);
26 }
27
ossl_policy_tree_find_sk(STACK_OF (X509_POLICY_NODE)* nodes,const ASN1_OBJECT * id)28 X509_POLICY_NODE *ossl_policy_tree_find_sk(STACK_OF(X509_POLICY_NODE) *nodes,
29 const ASN1_OBJECT *id)
30 {
31 X509_POLICY_DATA n;
32 X509_POLICY_NODE l;
33 int idx;
34
35 n.valid_policy = (ASN1_OBJECT *)id;
36 l.data = &n;
37
38 idx = sk_X509_POLICY_NODE_find(nodes, &l);
39 return sk_X509_POLICY_NODE_value(nodes, idx);
40
41 }
42
ossl_policy_level_find_node(const X509_POLICY_LEVEL * level,const X509_POLICY_NODE * parent,const ASN1_OBJECT * id)43 X509_POLICY_NODE *ossl_policy_level_find_node(const X509_POLICY_LEVEL *level,
44 const X509_POLICY_NODE *parent,
45 const ASN1_OBJECT *id)
46 {
47 X509_POLICY_NODE *node;
48 int i;
49 for (i = 0; i < sk_X509_POLICY_NODE_num(level->nodes); i++) {
50 node = sk_X509_POLICY_NODE_value(level->nodes, i);
51 if (node->parent == parent) {
52 if (!OBJ_cmp(node->data->valid_policy, id))
53 return node;
54 }
55 }
56 return NULL;
57 }
58
ossl_policy_level_add_node(X509_POLICY_LEVEL * level,X509_POLICY_DATA * data,X509_POLICY_NODE * parent,X509_POLICY_TREE * tree,int extra_data)59 X509_POLICY_NODE *ossl_policy_level_add_node(X509_POLICY_LEVEL *level,
60 X509_POLICY_DATA *data,
61 X509_POLICY_NODE *parent,
62 X509_POLICY_TREE *tree,
63 int extra_data)
64 {
65 X509_POLICY_NODE *node;
66
67 /* Verify that the tree isn't too large. This mitigates CVE-2023-0464 */
68 if (tree->node_maximum > 0 && tree->node_count >= tree->node_maximum)
69 return NULL;
70
71 node = OPENSSL_zalloc(sizeof(*node));
72 if (node == NULL)
73 return NULL;
74 node->data = data;
75 node->parent = parent;
76 if (level != NULL) {
77 if (OBJ_obj2nid(data->valid_policy) == NID_any_policy) {
78 if (level->anyPolicy)
79 goto node_error;
80 level->anyPolicy = node;
81 } else {
82
83 if (level->nodes == NULL)
84 level->nodes = ossl_policy_node_cmp_new();
85 if (level->nodes == NULL) {
86 ERR_raise(ERR_LIB_X509V3, ERR_R_X509_LIB);
87 goto node_error;
88 }
89 if (!sk_X509_POLICY_NODE_push(level->nodes, node)) {
90 ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
91 goto node_error;
92 }
93 }
94 }
95
96 if (extra_data) {
97 if (tree->extra_data == NULL)
98 tree->extra_data = sk_X509_POLICY_DATA_new_null();
99 if (tree->extra_data == NULL) {
100 ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
101 goto extra_data_error;
102 }
103 if (!sk_X509_POLICY_DATA_push(tree->extra_data, data)) {
104 ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
105 goto extra_data_error;
106 }
107 }
108
109 tree->node_count++;
110 if (parent)
111 parent->nchild++;
112
113 return node;
114
115 extra_data_error:
116 if (level != NULL) {
117 if (level->anyPolicy == node)
118 level->anyPolicy = NULL;
119 else
120 (void) sk_X509_POLICY_NODE_pop(level->nodes);
121 }
122
123 node_error:
124 ossl_policy_node_free(node);
125 return NULL;
126 }
127
ossl_policy_node_free(X509_POLICY_NODE * node)128 void ossl_policy_node_free(X509_POLICY_NODE *node)
129 {
130 OPENSSL_free(node);
131 }
132
133 /*
134 * See if a policy node matches a policy OID. If mapping enabled look through
135 * expected policy set otherwise just valid policy.
136 */
137
ossl_policy_node_match(const X509_POLICY_LEVEL * lvl,const X509_POLICY_NODE * node,const ASN1_OBJECT * oid)138 int ossl_policy_node_match(const X509_POLICY_LEVEL *lvl,
139 const X509_POLICY_NODE *node, const ASN1_OBJECT *oid)
140 {
141 int i;
142 ASN1_OBJECT *policy_oid;
143 const X509_POLICY_DATA *x = node->data;
144
145 if ((lvl->flags & X509_V_FLAG_INHIBIT_MAP)
146 || !(x->flags & POLICY_DATA_FLAG_MAP_MASK)) {
147 if (!OBJ_cmp(x->valid_policy, oid))
148 return 1;
149 return 0;
150 }
151
152 for (i = 0; i < sk_ASN1_OBJECT_num(x->expected_policy_set); i++) {
153 policy_oid = sk_ASN1_OBJECT_value(x->expected_policy_set, i);
154 if (!OBJ_cmp(policy_oid, oid))
155 return 1;
156 }
157 return 0;
158
159 }
160
