1/*
2 * Copyright 2004-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (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
17static 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
23STACK_OF(X509_POLICY_NODE) *policy_node_cmp_new(void)
24{
25    return sk_X509_POLICY_NODE_new(node_cmp);
26}
27
28X509_POLICY_NODE *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
43X509_POLICY_NODE *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
59X509_POLICY_NODE *level_add_node(X509_POLICY_LEVEL *level,
60                                 X509_POLICY_DATA *data,
61                                 X509_POLICY_NODE *parent,
62                                 X509_POLICY_TREE *tree)
63{
64    X509_POLICY_NODE *node;
65
66    node = OPENSSL_zalloc(sizeof(*node));
67    if (node == NULL) {
68        X509V3err(X509V3_F_LEVEL_ADD_NODE, ERR_R_MALLOC_FAILURE);
69        return NULL;
70    }
71    node->data = data;
72    node->parent = parent;
73    if (level) {
74        if (OBJ_obj2nid(data->valid_policy) == NID_any_policy) {
75            if (level->anyPolicy)
76                goto node_error;
77            level->anyPolicy = node;
78        } else {
79
80            if (level->nodes == NULL)
81                level->nodes = policy_node_cmp_new();
82            if (level->nodes == NULL) {
83                X509V3err(X509V3_F_LEVEL_ADD_NODE, ERR_R_MALLOC_FAILURE);
84                goto node_error;
85            }
86            if (!sk_X509_POLICY_NODE_push(level->nodes, node)) {
87                X509V3err(X509V3_F_LEVEL_ADD_NODE, ERR_R_MALLOC_FAILURE);
88                goto node_error;
89            }
90        }
91    }
92
93    if (tree) {
94        if (tree->extra_data == NULL)
95            tree->extra_data = sk_X509_POLICY_DATA_new_null();
96        if (tree->extra_data == NULL){
97            X509V3err(X509V3_F_LEVEL_ADD_NODE, ERR_R_MALLOC_FAILURE);
98            goto node_error;
99        }
100        if (!sk_X509_POLICY_DATA_push(tree->extra_data, data)) {
101            X509V3err(X509V3_F_LEVEL_ADD_NODE, ERR_R_MALLOC_FAILURE);
102            goto node_error;
103        }
104    }
105
106    if (parent)
107        parent->nchild++;
108
109    return node;
110
111 node_error:
112    policy_node_free(node);
113    return NULL;
114}
115
116void policy_node_free(X509_POLICY_NODE *node)
117{
118    OPENSSL_free(node);
119}
120
121/*
122 * See if a policy node matches a policy OID. If mapping enabled look through
123 * expected policy set otherwise just valid policy.
124 */
125
126int policy_node_match(const X509_POLICY_LEVEL *lvl,
127                      const X509_POLICY_NODE *node, const ASN1_OBJECT *oid)
128{
129    int i;
130    ASN1_OBJECT *policy_oid;
131    const X509_POLICY_DATA *x = node->data;
132
133    if ((lvl->flags & X509_V_FLAG_INHIBIT_MAP)
134        || !(x->flags & POLICY_DATA_FLAG_MAP_MASK)) {
135        if (!OBJ_cmp(x->valid_policy, oid))
136            return 1;
137        return 0;
138    }
139
140    for (i = 0; i < sk_ASN1_OBJECT_num(x->expected_policy_set); i++) {
141        policy_oid = sk_ASN1_OBJECT_value(x->expected_policy_set, i);
142        if (!OBJ_cmp(policy_oid, oid))
143            return 1;
144    }
145    return 0;
146
147}
148