1 /* $OpenBSD: x509_pcons.c,v 1.6 2024/08/31 10:03:03 tb Exp $ */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project.
4 */
5 /* ====================================================================
6 * Copyright (c) 2003 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59 #include <stdio.h>
60 #include <string.h>
61
62 #include <openssl/asn1.h>
63 #include <openssl/asn1t.h>
64 #include <openssl/conf.h>
65 #include <openssl/err.h>
66 #include <openssl/x509v3.h>
67
68 #include "x509_local.h"
69
70 static STACK_OF(CONF_VALUE) *
71 i2v_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *bcons,
72 STACK_OF(CONF_VALUE) *extlist);
73 static void *v2i_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method,
74 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values);
75
76 static const X509V3_EXT_METHOD x509v3_ext_policy_constraints = {
77 .ext_nid = NID_policy_constraints,
78 .ext_flags = 0,
79 .it = &POLICY_CONSTRAINTS_it,
80 .ext_new = NULL,
81 .ext_free = NULL,
82 .d2i = NULL,
83 .i2d = NULL,
84 .i2s = NULL,
85 .s2i = NULL,
86 .i2v = i2v_POLICY_CONSTRAINTS,
87 .v2i = v2i_POLICY_CONSTRAINTS,
88 .i2r = NULL,
89 .r2i = NULL,
90 .usr_data = NULL,
91 };
92
93 const X509V3_EXT_METHOD *
x509v3_ext_method_policy_constraints(void)94 x509v3_ext_method_policy_constraints(void)
95 {
96 return &x509v3_ext_policy_constraints;
97 }
98
99 static const ASN1_TEMPLATE POLICY_CONSTRAINTS_seq_tt[] = {
100 {
101 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
102 .tag = 0,
103 .offset = offsetof(POLICY_CONSTRAINTS, requireExplicitPolicy),
104 .field_name = "requireExplicitPolicy",
105 .item = &ASN1_INTEGER_it,
106 },
107 {
108 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
109 .tag = 1,
110 .offset = offsetof(POLICY_CONSTRAINTS, inhibitPolicyMapping),
111 .field_name = "inhibitPolicyMapping",
112 .item = &ASN1_INTEGER_it,
113 },
114 };
115
116 const ASN1_ITEM POLICY_CONSTRAINTS_it = {
117 .itype = ASN1_ITYPE_SEQUENCE,
118 .utype = V_ASN1_SEQUENCE,
119 .templates = POLICY_CONSTRAINTS_seq_tt,
120 .tcount = sizeof(POLICY_CONSTRAINTS_seq_tt) / sizeof(ASN1_TEMPLATE),
121 .funcs = NULL,
122 .size = sizeof(POLICY_CONSTRAINTS),
123 .sname = "POLICY_CONSTRAINTS",
124 };
125 LCRYPTO_ALIAS(POLICY_CONSTRAINTS_it);
126
127
128 POLICY_CONSTRAINTS *
POLICY_CONSTRAINTS_new(void)129 POLICY_CONSTRAINTS_new(void)
130 {
131 return (POLICY_CONSTRAINTS*)ASN1_item_new(&POLICY_CONSTRAINTS_it);
132 }
133 LCRYPTO_ALIAS(POLICY_CONSTRAINTS_new);
134
135 void
POLICY_CONSTRAINTS_free(POLICY_CONSTRAINTS * a)136 POLICY_CONSTRAINTS_free(POLICY_CONSTRAINTS *a)
137 {
138 ASN1_item_free((ASN1_VALUE *)a, &POLICY_CONSTRAINTS_it);
139 }
140 LCRYPTO_ALIAS(POLICY_CONSTRAINTS_free);
141
STACK_OF(CONF_VALUE)142 static STACK_OF(CONF_VALUE) *
143 i2v_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a,
144 STACK_OF(CONF_VALUE) *extlist)
145 {
146 POLICY_CONSTRAINTS *pcons = a;
147 STACK_OF(CONF_VALUE) *free_extlist = NULL;
148
149 if (extlist == NULL) {
150 if ((free_extlist = extlist = sk_CONF_VALUE_new_null()) == NULL)
151 return NULL;
152 }
153
154 if (!X509V3_add_value_int("Require Explicit Policy",
155 pcons->requireExplicitPolicy, &extlist))
156 goto err;
157 if (!X509V3_add_value_int("Inhibit Policy Mapping",
158 pcons->inhibitPolicyMapping, &extlist))
159 goto err;
160
161 return extlist;
162
163 err:
164 sk_CONF_VALUE_pop_free(free_extlist, X509V3_conf_free);
165
166 return NULL;
167 }
168
169 static void *
v2i_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD * method,X509V3_CTX * ctx,STACK_OF (CONF_VALUE)* values)170 v2i_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
171 STACK_OF(CONF_VALUE) *values)
172 {
173 POLICY_CONSTRAINTS *pcons = NULL;
174 CONF_VALUE *val;
175 int i;
176
177 if (!(pcons = POLICY_CONSTRAINTS_new())) {
178 X509V3error(ERR_R_MALLOC_FAILURE);
179 return NULL;
180 }
181 for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
182 val = sk_CONF_VALUE_value(values, i);
183 if (!strcmp(val->name, "requireExplicitPolicy")) {
184 if (!X509V3_get_value_int(val,
185 &pcons->requireExplicitPolicy)) goto err;
186 } else if (!strcmp(val->name, "inhibitPolicyMapping")) {
187 if (!X509V3_get_value_int(val,
188 &pcons->inhibitPolicyMapping)) goto err;
189 } else {
190 X509V3error(X509V3_R_INVALID_NAME);
191 X509V3_conf_err(val);
192 goto err;
193 }
194 }
195 if (!pcons->inhibitPolicyMapping && !pcons->requireExplicitPolicy) {
196 X509V3error(X509V3_R_ILLEGAL_EMPTY_EXTENSION);
197 goto err;
198 }
199
200 return pcons;
201
202 err:
203 POLICY_CONSTRAINTS_free(pcons);
204 return NULL;
205 }
206