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
72 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
73 AUTHORITY_KEYID *akeyid,
74 STACK_OF(CONF_VALUE)
75 *extlist);
76 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
77 X509V3_CTX *ctx,
78 STACK_OF(CONF_VALUE) *values);
79
80 const 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
STACK_OF(CONF_VALUE)91 static 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 = NULL;
97 int extlist_was_null = extlist == NULL;
98 if (akeyid->keyid) {
99 tmp = x509v3_bytes_to_hex(akeyid->keyid->data, akeyid->keyid->length);
100 int ok = tmp != NULL && X509V3_add_value("keyid", tmp, &extlist);
101 OPENSSL_free(tmp);
102 if (!ok) {
103 goto err;
104 }
105 }
106 if (akeyid->issuer) {
107 STACK_OF(CONF_VALUE) *tmpextlist =
108 i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
109 if (tmpextlist == NULL) {
110 goto err;
111 }
112 extlist = tmpextlist;
113 }
114 if (akeyid->serial) {
115 tmp = x509v3_bytes_to_hex(akeyid->serial->data, akeyid->serial->length);
116 int ok = tmp != NULL && X509V3_add_value("serial", tmp, &extlist);
117 OPENSSL_free(tmp);
118 if (!ok) {
119 goto err;
120 }
121 }
122 return extlist;
123
124 err:
125 if (extlist_was_null) {
126 sk_CONF_VALUE_pop_free(extlist, X509V3_conf_free);
127 }
128 return NULL;
129 }
130
131 /*
132 * Currently two options: keyid: use the issuers subject keyid, the value
133 * 'always' means its is an error if the issuer certificate doesn't have a
134 * key id. issuer: use the issuers cert issuer and serial number. The default
135 * is to only use this if keyid is not present. With the option 'always' this
136 * is always included.
137 */
138
v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD * method,X509V3_CTX * ctx,STACK_OF (CONF_VALUE)* values)139 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
140 X509V3_CTX *ctx,
141 STACK_OF(CONF_VALUE) *values)
142 {
143 char keyid = 0, issuer = 0;
144 size_t i;
145 int j;
146 CONF_VALUE *cnf;
147 ASN1_OCTET_STRING *ikeyid = NULL;
148 X509_NAME *isname = NULL;
149 GENERAL_NAMES *gens = NULL;
150 GENERAL_NAME *gen = NULL;
151 ASN1_INTEGER *serial = NULL;
152 X509_EXTENSION *ext;
153 X509 *cert;
154 AUTHORITY_KEYID *akeyid;
155
156 for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
157 cnf = sk_CONF_VALUE_value(values, i);
158 if (!strcmp(cnf->name, "keyid")) {
159 keyid = 1;
160 if (cnf->value && !strcmp(cnf->value, "always"))
161 keyid = 2;
162 } else if (!strcmp(cnf->name, "issuer")) {
163 issuer = 1;
164 if (cnf->value && !strcmp(cnf->value, "always"))
165 issuer = 2;
166 } else {
167 OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNKNOWN_OPTION);
168 ERR_add_error_data(2, "name=", cnf->name);
169 return NULL;
170 }
171 }
172
173 if (!ctx || !ctx->issuer_cert) {
174 if (ctx && (ctx->flags == CTX_TEST))
175 return AUTHORITY_KEYID_new();
176 OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_ISSUER_CERTIFICATE);
177 return NULL;
178 }
179
180 cert = ctx->issuer_cert;
181
182 if (keyid) {
183 j = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
184 if ((j >= 0) && (ext = X509_get_ext(cert, j)))
185 ikeyid = X509V3_EXT_d2i(ext);
186 if (keyid == 2 && !ikeyid) {
187 OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
188 return NULL;
189 }
190 }
191
192 if ((issuer && !ikeyid) || (issuer == 2)) {
193 isname = X509_NAME_dup(X509_get_issuer_name(cert));
194 serial = ASN1_INTEGER_dup(X509_get_serialNumber(cert));
195 if (!isname || !serial) {
196 OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
197 goto err;
198 }
199 }
200
201 if (!(akeyid = AUTHORITY_KEYID_new()))
202 goto err;
203
204 if (isname) {
205 if (!(gens = sk_GENERAL_NAME_new_null())
206 || !(gen = GENERAL_NAME_new())
207 || !sk_GENERAL_NAME_push(gens, gen)) {
208 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
209 goto err;
210 }
211 gen->type = GEN_DIRNAME;
212 gen->d.dirn = isname;
213 }
214
215 akeyid->issuer = gens;
216 akeyid->serial = serial;
217 akeyid->keyid = ikeyid;
218
219 return akeyid;
220
221 err:
222 X509_NAME_free(isname);
223 ASN1_INTEGER_free(serial);
224 ASN1_OCTET_STRING_free(ikeyid);
225 return NULL;
226 }
227