1 /* v3_akey.c */
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 "cryptlib.h"
61 #include <openssl/conf.h>
62 #include <openssl/asn1.h>
63 #include <openssl/asn1t.h>
64 #include <openssl/x509v3.h>
65
66 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
67 AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist);
68 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
69 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values);
70
71 const X509V3_EXT_METHOD v3_akey_id =
72 {
73 NID_authority_key_identifier,
74 X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID),
75 0,0,0,0,
76 0,0,
77 (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID,
78 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
79 0,0,
80 NULL
81 };
82
83 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
84 AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist)
85 {
86 char *tmp;
87 if(akeyid->keyid) {
88 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length);
89 X509V3_add_value("keyid", tmp, &extlist);
90 OPENSSL_free(tmp);
91 }
92 if(akeyid->issuer)
93 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
94 if(akeyid->serial) {
95 tmp = hex_to_string(akeyid->serial->data,
96 akeyid->serial->length);
97 X509V3_add_value("serial", tmp, &extlist);
98 OPENSSL_free(tmp);
99 }
100 return extlist;
101 }
102
103 /* Currently two options:
104 * keyid: use the issuers subject keyid, the value 'always' means its is
105 * an error if the issuer certificate doesn't have a key id.
106 * issuer: use the issuers cert issuer and serial number. The default is
107 * to only use this if keyid is not present. With the option 'always'
108 * this is always included.
109 */
110
111 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
112 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values)
113 {
114 char keyid=0, issuer=0;
115 int i;
116 CONF_VALUE *cnf;
117 ASN1_OCTET_STRING *ikeyid = NULL;
118 X509_NAME *isname = NULL;
119 GENERAL_NAMES * gens = NULL;
120 GENERAL_NAME *gen = NULL;
121 ASN1_INTEGER *serial = NULL;
122 X509_EXTENSION *ext;
123 X509 *cert;
124 AUTHORITY_KEYID *akeyid;
125
126 for(i = 0; i < sk_CONF_VALUE_num(values); i++)
127 {
128 cnf = sk_CONF_VALUE_value(values, i);
129 if(!strcmp(cnf->name, "keyid"))
130 {
131 keyid = 1;
132 if(cnf->value && !strcmp(cnf->value, "always"))
133 keyid = 2;
134 }
135 else if(!strcmp(cnf->name, "issuer"))
136 {
137 issuer = 1;
138 if(cnf->value && !strcmp(cnf->value, "always"))
139 issuer = 2;
140 }
141 else
142 {
143 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNKNOWN_OPTION);
144 ERR_add_error_data(2, "name=", cnf->name);
145 return NULL;
146 }
147 }
148
149 if(!ctx || !ctx->issuer_cert)
150 {
151 if(ctx && (ctx->flags==CTX_TEST))
152 return AUTHORITY_KEYID_new();
153 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_NO_ISSUER_CERTIFICATE);
154 return NULL;
155 }
156
157 cert = ctx->issuer_cert;
158
159 if(keyid)
160 {
161 i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
162 if((i >= 0) && (ext = X509_get_ext(cert, i)))
163 ikeyid = X509V3_EXT_d2i(ext);
164 if(keyid==2 && !ikeyid)
165 {
166 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
167 return NULL;
168 }
169 }
170
171 if((issuer && !ikeyid) || (issuer == 2))
172 {
173 isname = X509_NAME_dup(X509_get_issuer_name(cert));
174 serial = M_ASN1_INTEGER_dup(X509_get_serialNumber(cert));
175 if(!isname || !serial)
176 {
177 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
178 goto err;
179 }
180 }
181
182 if(!(akeyid = AUTHORITY_KEYID_new())) goto err;
183
184 if(isname)
185 {
186 if(!(gens = sk_GENERAL_NAME_new_null())
187 || !(gen = GENERAL_NAME_new())
188 || !sk_GENERAL_NAME_push(gens, gen))
189 {
190 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE);
191 goto err;
192 }
193 gen->type = GEN_DIRNAME;
194 gen->d.dirn = isname;
195 }
196
197 akeyid->issuer = gens;
198 akeyid->serial = serial;
199 akeyid->keyid = ikeyid;
200
201 return akeyid;
202
203 err:
204 X509_NAME_free(isname);
205 M_ASN1_INTEGER_free(serial);
206 M_ASN1_OCTET_STRING_free(ikeyid);
207 return NULL;
208 }