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 #include <stdio.h>
58
59 #include <openssl/asn1.h>
60 #include <openssl/asn1t.h>
61 #include <openssl/conf.h>
62 #include <openssl/err.h>
63 #include <openssl/mem.h>
64 #include <openssl/obj.h>
65 #include <openssl/x509v3.h>
66
67
68 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
69 AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist);
70 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
71 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values);
72
73 const X509V3_EXT_METHOD v3_akey_id =
74 {
75 NID_authority_key_identifier,
76 X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID),
77 0,0,0,0,
78 0,0,
79 (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID,
80 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
81 0,0,
82 NULL
83 };
84
STACK_OF(CONF_VALUE)85 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
86 AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist)
87 {
88 char *tmp;
89 if(akeyid->keyid) {
90 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length);
91 X509V3_add_value("keyid", tmp, &extlist);
92 OPENSSL_free(tmp);
93 }
94 if(akeyid->issuer)
95 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
96 if(akeyid->serial) {
97 tmp = hex_to_string(akeyid->serial->data,
98 akeyid->serial->length);
99 X509V3_add_value("serial", tmp, &extlist);
100 OPENSSL_free(tmp);
101 }
102 return extlist;
103 }
104
105 /* Currently two options:
106 * keyid: use the issuers subject keyid, the value 'always' means its is
107 * an error if the issuer certificate doesn't have a key id.
108 * issuer: use the issuers cert issuer and serial number. The default is
109 * to only use this if keyid is not present. With the option 'always'
110 * this is always included.
111 */
112
v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD * method,X509V3_CTX * ctx,STACK_OF (CONF_VALUE)* values)113 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
114 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values)
115 {
116 char keyid=0, issuer=0;
117 size_t i;
118 int j;
119 CONF_VALUE *cnf;
120 ASN1_OCTET_STRING *ikeyid = NULL;
121 X509_NAME *isname = NULL;
122 GENERAL_NAMES * gens = NULL;
123 GENERAL_NAME *gen = NULL;
124 ASN1_INTEGER *serial = NULL;
125 X509_EXTENSION *ext;
126 X509 *cert;
127 AUTHORITY_KEYID *akeyid;
128
129 for(i = 0; i < sk_CONF_VALUE_num(values); i++)
130 {
131 cnf = sk_CONF_VALUE_value(values, i);
132 if(!strcmp(cnf->name, "keyid"))
133 {
134 keyid = 1;
135 if(cnf->value && !strcmp(cnf->value, "always"))
136 keyid = 2;
137 }
138 else if(!strcmp(cnf->name, "issuer"))
139 {
140 issuer = 1;
141 if(cnf->value && !strcmp(cnf->value, "always"))
142 issuer = 2;
143 }
144 else
145 {
146 OPENSSL_PUT_ERROR(X509V3, v2i_AUTHORITY_KEYID, X509V3_R_UNKNOWN_OPTION);
147 ERR_add_error_data(2, "name=", cnf->name);
148 return NULL;
149 }
150 }
151
152 if(!ctx || !ctx->issuer_cert)
153 {
154 if(ctx && (ctx->flags==CTX_TEST))
155 return AUTHORITY_KEYID_new();
156 OPENSSL_PUT_ERROR(X509V3, v2i_AUTHORITY_KEYID, X509V3_R_NO_ISSUER_CERTIFICATE);
157 return NULL;
158 }
159
160 cert = ctx->issuer_cert;
161
162 if(keyid)
163 {
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 {
169 OPENSSL_PUT_ERROR(X509V3, v2i_AUTHORITY_KEYID, X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
170 return NULL;
171 }
172 }
173
174 if((issuer && !ikeyid) || (issuer == 2))
175 {
176 isname = X509_NAME_dup(X509_get_issuer_name(cert));
177 serial = M_ASN1_INTEGER_dup(X509_get_serialNumber(cert));
178 if(!isname || !serial)
179 {
180 OPENSSL_PUT_ERROR(X509V3, v2i_AUTHORITY_KEYID, X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
181 goto err;
182 }
183 }
184
185 if(!(akeyid = AUTHORITY_KEYID_new())) goto err;
186
187 if(isname)
188 {
189 if(!(gens = sk_GENERAL_NAME_new_null())
190 || !(gen = GENERAL_NAME_new())
191 || !sk_GENERAL_NAME_push(gens, gen))
192 {
193 OPENSSL_PUT_ERROR(X509V3, v2i_AUTHORITY_KEYID, ERR_R_MALLOC_FAILURE);
194 goto err;
195 }
196 gen->type = GEN_DIRNAME;
197 gen->d.dirn = isname;
198 }
199
200 akeyid->issuer = gens;
201 akeyid->serial = serial;
202 akeyid->keyid = ikeyid;
203
204 return akeyid;
205
206 err:
207 X509_NAME_free(isname);
208 M_ASN1_INTEGER_free(serial);
209 M_ASN1_OCTET_STRING_free(ikeyid);
210 return NULL;
211 }
212