1 /* $OpenBSD: x509_bcons.c,v 1.1 2020/06/04 15:19:31 jsing Exp $ */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 1999.
4 */
5 /* ====================================================================
6 * Copyright (c) 1999 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 static STACK_OF(CONF_VALUE) *i2v_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method,
69 BASIC_CONSTRAINTS *bcons, STACK_OF(CONF_VALUE) *extlist);
70 static BASIC_CONSTRAINTS *v2i_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method,
71 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values);
72
73 const X509V3_EXT_METHOD v3_bcons = {
74 .ext_nid = NID_basic_constraints,
75 .ext_flags = 0,
76 .it = &BASIC_CONSTRAINTS_it,
77 .ext_new = NULL,
78 .ext_free = NULL,
79 .d2i = NULL,
80 .i2d = NULL,
81 .i2s = NULL,
82 .s2i = NULL,
83 .i2v = (X509V3_EXT_I2V)i2v_BASIC_CONSTRAINTS,
84 .v2i = (X509V3_EXT_V2I)v2i_BASIC_CONSTRAINTS,
85 .i2r = NULL,
86 .r2i = NULL,
87 .usr_data = NULL,
88 };
89
90 static const ASN1_TEMPLATE BASIC_CONSTRAINTS_seq_tt[] = {
91 {
92 .flags = ASN1_TFLG_OPTIONAL,
93 .tag = 0,
94 .offset = offsetof(BASIC_CONSTRAINTS, ca),
95 .field_name = "ca",
96 .item = &ASN1_FBOOLEAN_it,
97 },
98 {
99 .flags = ASN1_TFLG_OPTIONAL,
100 .tag = 0,
101 .offset = offsetof(BASIC_CONSTRAINTS, pathlen),
102 .field_name = "pathlen",
103 .item = &ASN1_INTEGER_it,
104 },
105 };
106
107 const ASN1_ITEM BASIC_CONSTRAINTS_it = {
108 .itype = ASN1_ITYPE_SEQUENCE,
109 .utype = V_ASN1_SEQUENCE,
110 .templates = BASIC_CONSTRAINTS_seq_tt,
111 .tcount = sizeof(BASIC_CONSTRAINTS_seq_tt) / sizeof(ASN1_TEMPLATE),
112 .funcs = NULL,
113 .size = sizeof(BASIC_CONSTRAINTS),
114 .sname = "BASIC_CONSTRAINTS",
115 };
116
117
118 BASIC_CONSTRAINTS *
d2i_BASIC_CONSTRAINTS(BASIC_CONSTRAINTS ** a,const unsigned char ** in,long len)119 d2i_BASIC_CONSTRAINTS(BASIC_CONSTRAINTS **a, const unsigned char **in, long len)
120 {
121 return (BASIC_CONSTRAINTS *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
122 &BASIC_CONSTRAINTS_it);
123 }
124
125 int
i2d_BASIC_CONSTRAINTS(BASIC_CONSTRAINTS * a,unsigned char ** out)126 i2d_BASIC_CONSTRAINTS(BASIC_CONSTRAINTS *a, unsigned char **out)
127 {
128 return ASN1_item_i2d((ASN1_VALUE *)a, out, &BASIC_CONSTRAINTS_it);
129 }
130
131 BASIC_CONSTRAINTS *
BASIC_CONSTRAINTS_new(void)132 BASIC_CONSTRAINTS_new(void)
133 {
134 return (BASIC_CONSTRAINTS *)ASN1_item_new(&BASIC_CONSTRAINTS_it);
135 }
136
137 void
BASIC_CONSTRAINTS_free(BASIC_CONSTRAINTS * a)138 BASIC_CONSTRAINTS_free(BASIC_CONSTRAINTS *a)
139 {
140 ASN1_item_free((ASN1_VALUE *)a, &BASIC_CONSTRAINTS_it);
141 }
142
143
STACK_OF(CONF_VALUE)144 static STACK_OF(CONF_VALUE) *
145 i2v_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method, BASIC_CONSTRAINTS *bcons,
146 STACK_OF(CONF_VALUE) *extlist)
147 {
148 STACK_OF(CONF_VALUE) *free_extlist = NULL;
149
150 if (extlist == NULL) {
151 if ((free_extlist = extlist = sk_CONF_VALUE_new_null()) == NULL)
152 return NULL;
153 }
154
155 if (!X509V3_add_value_bool("CA", bcons->ca, &extlist))
156 goto err;
157 if (!X509V3_add_value_int("pathlen", bcons->pathlen, &extlist))
158 goto err;
159
160 return extlist;
161
162 err:
163 sk_CONF_VALUE_pop_free(free_extlist, X509V3_conf_free);
164
165 return NULL;
166 }
167
168 static BASIC_CONSTRAINTS *
v2i_BASIC_CONSTRAINTS(X509V3_EXT_METHOD * method,X509V3_CTX * ctx,STACK_OF (CONF_VALUE)* values)169 v2i_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
170 STACK_OF(CONF_VALUE) *values)
171 {
172 BASIC_CONSTRAINTS *bcons = NULL;
173 CONF_VALUE *val;
174 int i;
175
176 if (!(bcons = BASIC_CONSTRAINTS_new())) {
177 X509V3error(ERR_R_MALLOC_FAILURE);
178 return NULL;
179 }
180 for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
181 val = sk_CONF_VALUE_value(values, i);
182 if (!strcmp(val->name, "CA")) {
183 if (!X509V3_get_value_bool(val, &bcons->ca))
184 goto err;
185 } else if (!strcmp(val->name, "pathlen")) {
186 if (!X509V3_get_value_int(val, &bcons->pathlen))
187 goto err;
188 } else {
189 X509V3error(X509V3_R_INVALID_NAME);
190 X509V3_conf_err(val);
191 goto err;
192 }
193 }
194 return bcons;
195
196 err:
197 BASIC_CONSTRAINTS_free(bcons);
198 return NULL;
199 }
200