1 /* pcy_node.c */
2 /*
3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4  * 2004.
5  */
6 /* ====================================================================
7  * Copyright (c) 2004 The OpenSSL Project.  All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in
18  *    the documentation and/or other materials provided with the
19  *    distribution.
20  *
21  * 3. All advertising materials mentioning features or use of this
22  *    software must display the following acknowledgment:
23  *    "This product includes software developed by the OpenSSL Project
24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25  *
26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27  *    endorse or promote products derived from this software without
28  *    prior written permission. For written permission, please contact
29  *    licensing@OpenSSL.org.
30  *
31  * 5. Products derived from this software may not be called "OpenSSL"
32  *    nor may "OpenSSL" appear in their names without prior written
33  *    permission of the OpenSSL Project.
34  *
35  * 6. Redistributions of any form whatsoever must retain the following
36  *    acknowledgment:
37  *    "This product includes software developed by the OpenSSL Project
38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39  *
40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51  * OF THE POSSIBILITY OF SUCH DAMAGE.
52  * ====================================================================
53  *
54  * This product includes cryptographic software written by Eric Young
55  * (eay@cryptsoft.com).  This product includes software written by Tim
56  * Hudson (tjh@cryptsoft.com). */
57 
58 #include <openssl/asn1.h>
59 #include <openssl/mem.h>
60 #include <openssl/obj.h>
61 #include <openssl/x509.h>
62 #include <openssl/x509v3.h>
63 
64 #include "pcy_int.h"
65 
node_cmp(const X509_POLICY_NODE ** a,const X509_POLICY_NODE ** b)66 static int node_cmp(const X509_POLICY_NODE **a, const X509_POLICY_NODE **b)
67 {
68     return OBJ_cmp((*a)->data->valid_policy, (*b)->data->valid_policy);
69 }
70 
STACK_OF(X509_POLICY_NODE)71 STACK_OF(X509_POLICY_NODE) *policy_node_cmp_new(void)
72 {
73     return sk_X509_POLICY_NODE_new(node_cmp);
74 }
75 
tree_find_sk(STACK_OF (X509_POLICY_NODE)* nodes,const ASN1_OBJECT * id)76 X509_POLICY_NODE *tree_find_sk(STACK_OF(X509_POLICY_NODE) *nodes,
77                                const ASN1_OBJECT *id)
78 {
79     X509_POLICY_DATA n;
80     X509_POLICY_NODE l;
81     size_t idx;
82 
83     n.valid_policy = (ASN1_OBJECT *)id;
84     l.data = &n;
85 
86     sk_X509_POLICY_NODE_sort(nodes);
87     if (!sk_X509_POLICY_NODE_find(nodes, &idx, &l))
88         return NULL;
89 
90     return sk_X509_POLICY_NODE_value(nodes, idx);
91 
92 }
93 
level_find_node(const X509_POLICY_LEVEL * level,const X509_POLICY_NODE * parent,const ASN1_OBJECT * id)94 X509_POLICY_NODE *level_find_node(const X509_POLICY_LEVEL *level,
95                                   const X509_POLICY_NODE *parent,
96                                   const ASN1_OBJECT *id)
97 {
98     X509_POLICY_NODE *node;
99     size_t i;
100     for (i = 0; i < sk_X509_POLICY_NODE_num(level->nodes); i++) {
101         node = sk_X509_POLICY_NODE_value(level->nodes, i);
102         if (node->parent == parent) {
103             if (!OBJ_cmp(node->data->valid_policy, id))
104                 return node;
105         }
106     }
107     return NULL;
108 }
109 
level_add_node(X509_POLICY_LEVEL * level,X509_POLICY_DATA * data,X509_POLICY_NODE * parent,X509_POLICY_TREE * tree)110 X509_POLICY_NODE *level_add_node(X509_POLICY_LEVEL *level,
111                                  X509_POLICY_DATA *data,
112                                  X509_POLICY_NODE *parent,
113                                  X509_POLICY_TREE *tree)
114 {
115     X509_POLICY_NODE *node;
116     node = OPENSSL_malloc(sizeof(X509_POLICY_NODE));
117     if (!node)
118         return NULL;
119     node->data = data;
120     node->parent = parent;
121     node->nchild = 0;
122     if (level) {
123         if (OBJ_obj2nid(data->valid_policy) == NID_any_policy) {
124             if (level->anyPolicy)
125                 goto node_error;
126             level->anyPolicy = node;
127         } else {
128 
129             if (!level->nodes)
130                 level->nodes = policy_node_cmp_new();
131             if (!level->nodes)
132                 goto node_error;
133             if (!sk_X509_POLICY_NODE_push(level->nodes, node))
134                 goto node_error;
135         }
136     }
137 
138     if (tree) {
139         if (!tree->extra_data)
140             tree->extra_data = sk_X509_POLICY_DATA_new_null();
141         if (!tree->extra_data)
142             goto node_error;
143         if (!sk_X509_POLICY_DATA_push(tree->extra_data, data))
144             goto node_error;
145     }
146 
147     if (parent)
148         parent->nchild++;
149 
150     return node;
151 
152  node_error:
153     policy_node_free(node);
154     return 0;
155 
156 }
157 
policy_node_free(X509_POLICY_NODE * node)158 void policy_node_free(X509_POLICY_NODE *node)
159 {
160     OPENSSL_free(node);
161 }
162 
163 /*
164  * See if a policy node matches a policy OID. If mapping enabled look through
165  * expected policy set otherwise just valid policy.
166  */
167 
policy_node_match(const X509_POLICY_LEVEL * lvl,const X509_POLICY_NODE * node,const ASN1_OBJECT * oid)168 int policy_node_match(const X509_POLICY_LEVEL *lvl,
169                       const X509_POLICY_NODE *node, const ASN1_OBJECT *oid)
170 {
171     size_t i;
172     ASN1_OBJECT *policy_oid;
173     const X509_POLICY_DATA *x = node->data;
174 
175     if ((lvl->flags & X509_V_FLAG_INHIBIT_MAP)
176         || !(x->flags & POLICY_DATA_FLAG_MAP_MASK)) {
177         if (!OBJ_cmp(x->valid_policy, oid))
178             return 1;
179         return 0;
180     }
181 
182     for (i = 0; i < sk_ASN1_OBJECT_num(x->expected_policy_set); i++) {
183         policy_oid = sk_ASN1_OBJECT_value(x->expected_policy_set, i);
184         if (!OBJ_cmp(policy_oid, oid))
185             return 1;
186     }
187     return 0;
188 
189 }
190