1/* v3_akey.c */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 1999.
5 */
6/* ====================================================================
7 * Copyright (c) 1999 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 <stdio.h>
59#include <string.h>
60
61#include <openssl/asn1.h>
62#include <openssl/asn1t.h>
63#include <openssl/conf.h>
64#include <openssl/err.h>
65#include <openssl/mem.h>
66#include <openssl/obj.h>
67#include <openssl/x509v3.h>
68
69#include "internal.h"
70
71
72static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
73 AUTHORITY_KEYID *akeyid,
74 STACK_OF(CONF_VALUE)
75 *extlist);
76static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
77 X509V3_CTX *ctx,
78 STACK_OF(CONF_VALUE) *values);
79
80const X509V3_EXT_METHOD v3_akey_id = {
81 NID_authority_key_identifier,
82 X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID),
83 0, 0, 0, 0,
84 0, 0,
85 (X509V3_EXT_I2V) i2v_AUTHORITY_KEYID,
86 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
87 0, 0,
88 NULL
89};
90
91static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
92 AUTHORITY_KEYID *akeyid,
93 STACK_OF(CONF_VALUE)
94 *extlist)
95{
96 char *tmp;
97 if (akeyid->keyid) {
98 tmp = x509v3_bytes_to_hex(akeyid->keyid->data, akeyid->keyid->length);
99 X509V3_add_value("keyid", tmp, &extlist);
100 OPENSSL_free(tmp);
101 }
102 if (akeyid->issuer)
103 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
104 if (akeyid->serial) {
105 tmp = x509v3_bytes_to_hex(akeyid->serial->data, akeyid->serial->length);
106 X509V3_add_value("serial", tmp, &extlist);
107 OPENSSL_free(tmp);
108 }
109 return extlist;
110}
111
112/*
113 * Currently two options: keyid: use the issuers subject keyid, the value
114 * 'always' means its is an error if the issuer certificate doesn't have a
115 * key id. issuer: use the issuers cert issuer and serial number. The default
116 * is to only use this if keyid is not present. With the option 'always' this
117 * is always included.
118 */
119
120static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
121 X509V3_CTX *ctx,
122 STACK_OF(CONF_VALUE) *values)
123{
124 char keyid = 0, issuer = 0;
125 size_t i;
126 int j;
127 CONF_VALUE *cnf;
128 ASN1_OCTET_STRING *ikeyid = NULL;
129 X509_NAME *isname = NULL;
130 GENERAL_NAMES *gens = NULL;
131 GENERAL_NAME *gen = NULL;
132 ASN1_INTEGER *serial = NULL;
133 X509_EXTENSION *ext;
134 X509 *cert;
135 AUTHORITY_KEYID *akeyid;
136
137 for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
138 cnf = sk_CONF_VALUE_value(values, i);
139 if (!strcmp(cnf->name, "keyid")) {
140 keyid = 1;
141 if (cnf->value && !strcmp(cnf->value, "always"))
142 keyid = 2;
143 } else if (!strcmp(cnf->name, "issuer")) {
144 issuer = 1;
145 if (cnf->value && !strcmp(cnf->value, "always"))
146 issuer = 2;
147 } else {
148 OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNKNOWN_OPTION);
149 ERR_add_error_data(2, "name=", cnf->name);
150 return NULL;
151 }
152 }
153
154 if (!ctx || !ctx->issuer_cert) {
155 if (ctx && (ctx->flags == CTX_TEST))
156 return AUTHORITY_KEYID_new();
157 OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_ISSUER_CERTIFICATE);
158 return NULL;
159 }
160
161 cert = ctx->issuer_cert;
162
163 if (keyid) {
164 j = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
165 if ((j >= 0) && (ext = X509_get_ext(cert, j)))
166 ikeyid = X509V3_EXT_d2i(ext);
167 if (keyid == 2 && !ikeyid) {
168 OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
169 return NULL;
170 }
171 }
172
173 if ((issuer && !ikeyid) || (issuer == 2)) {
174 isname = X509_NAME_dup(X509_get_issuer_name(cert));
175 serial = M_ASN1_INTEGER_dup(X509_get_serialNumber(cert));
176 if (!isname || !serial) {
177 OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
178 goto err;
179 }
180 }
181
182 if (!(akeyid = AUTHORITY_KEYID_new()))
183 goto err;
184
185 if (isname) {
186 if (!(gens = sk_GENERAL_NAME_new_null())
187 || !(gen = GENERAL_NAME_new())
188 || !sk_GENERAL_NAME_push(gens, gen)) {
189 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
190 goto err;
191 }
192 gen->type = GEN_DIRNAME;
193 gen->d.dirn = isname;
194 }
195
196 akeyid->issuer = gens;
197 akeyid->serial = serial;
198 akeyid->keyid = ikeyid;
199
200 return akeyid;
201
202 err:
203 X509_NAME_free(isname);
204 M_ASN1_INTEGER_free(serial);
205 M_ASN1_OCTET_STRING_free(ikeyid);
206 return NULL;
207}
208