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 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
74 return NULL;
75 }
76 node->data = data;
77 node->parent = parent;
78 if (level != NULL) {
79 if (OBJ_obj2nid(data->valid_policy) == NID_any_policy) {
80 if (level->anyPolicy)
81 goto node_error;
82 level->anyPolicy = node;
83 } else {
84
85 if (level->nodes == NULL)
86 level->nodes = ossl_policy_node_cmp_new();
87 if (level->nodes == NULL) {
88 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
89 goto node_error;
90 }
91 if (!sk_X509_POLICY_NODE_push(level->nodes, node)) {
92 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
93 goto node_error;
94 }
95 }
96 }
97
98 if (extra_data) {
99 if (tree->extra_data == NULL)
100 tree->extra_data = sk_X509_POLICY_DATA_new_null();
101 if (tree->extra_data == NULL){
102 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
103 goto extra_data_error;
104 }
105 if (!sk_X509_POLICY_DATA_push(tree->extra_data, data)) {
106 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
107 goto extra_data_error;
108 }
109 }
110
111 tree->node_count++;
112 if (parent)
113 parent->nchild++;
114
115 return node;
116
117 extra_data_error:
118 if (level != NULL) {
119 if (level->anyPolicy == node)
120 level->anyPolicy = NULL;
121 else
122 (void) sk_X509_POLICY_NODE_pop(level->nodes);
123 }
124
125 node_error:
126 ossl_policy_node_free(node);
127 return NULL;
128 }
129
ossl_policy_node_free(X509_POLICY_NODE * node)130 void ossl_policy_node_free(X509_POLICY_NODE *node)
131 {
132 OPENSSL_free(node);
133 }
134
135 /*
136 * See if a policy node matches a policy OID. If mapping enabled look through
137 * expected policy set otherwise just valid policy.
138 */
139
ossl_policy_node_match(const X509_POLICY_LEVEL * lvl,const X509_POLICY_NODE * node,const ASN1_OBJECT * oid)140 int ossl_policy_node_match(const X509_POLICY_LEVEL *lvl,
141 const X509_POLICY_NODE *node, const ASN1_OBJECT *oid)
142 {
143 int i;
144 ASN1_OBJECT *policy_oid;
145 const X509_POLICY_DATA *x = node->data;
146
147 if ((lvl->flags & X509_V_FLAG_INHIBIT_MAP)
148 || !(x->flags & POLICY_DATA_FLAG_MAP_MASK)) {
149 if (!OBJ_cmp(x->valid_policy, oid))
150 return 1;
151 return 0;
152 }
153
154 for (i = 0; i < sk_ASN1_OBJECT_num(x->expected_policy_set); i++) {
155 policy_oid = sk_ASN1_OBJECT_value(x->expected_policy_set, i);
156 if (!OBJ_cmp(policy_oid, oid))
157 return 1;
158 }
159 return 0;
160
161 }
162