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 #include <string.h>
59
60 #include <openssl/asn1.h>
61 #include <openssl/asn1t.h>
62 #include <openssl/conf.h>
63 #include <openssl/err.h>
64 #include <openssl/mem.h>
65 #include <openssl/obj.h>
66 #include <openssl/x509v3.h>
67
68
69 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
70 AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist);
71 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
72 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values);
73
74 const X509V3_EXT_METHOD v3_akey_id =
75 {
76 NID_authority_key_identifier,
77 X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID),
78 0,0,0,0,
79 0,0,
80 (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID,
81 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
82 0,0,
83 NULL
84 };
85
STACK_OF(CONF_VALUE)86 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
87 AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist)
88 {
89 char *tmp;
90 if(akeyid->keyid) {
91 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length);
92 X509V3_add_value("keyid", tmp, &extlist);
93 OPENSSL_free(tmp);
94 }
95 if(akeyid->issuer)
96 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
97 if(akeyid->serial) {
98 tmp = hex_to_string(akeyid->serial->data,
99 akeyid->serial->length);
100 X509V3_add_value("serial", tmp, &extlist);
101 OPENSSL_free(tmp);
102 }
103 return extlist;
104 }
105
106 /* Currently two options:
107 * keyid: use the issuers subject keyid, the value 'always' means its is
108 * an error if the issuer certificate doesn't have a key id.
109 * issuer: use the issuers cert issuer and serial number. The default is
110 * to only use this if keyid is not present. With the option 'always'
111 * this is always included.
112 */
113
v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD * method,X509V3_CTX * ctx,STACK_OF (CONF_VALUE)* values)114 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
115 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values)
116 {
117 char keyid=0, issuer=0;
118 size_t i;
119 int j;
120 CONF_VALUE *cnf;
121 ASN1_OCTET_STRING *ikeyid = NULL;
122 X509_NAME *isname = NULL;
123 GENERAL_NAMES * gens = NULL;
124 GENERAL_NAME *gen = NULL;
125 ASN1_INTEGER *serial = NULL;
126 X509_EXTENSION *ext;
127 X509 *cert;
128 AUTHORITY_KEYID *akeyid;
129
130 for(i = 0; i < sk_CONF_VALUE_num(values); i++)
131 {
132 cnf = sk_CONF_VALUE_value(values, i);
133 if(!strcmp(cnf->name, "keyid"))
134 {
135 keyid = 1;
136 if(cnf->value && !strcmp(cnf->value, "always"))
137 keyid = 2;
138 }
139 else if(!strcmp(cnf->name, "issuer"))
140 {
141 issuer = 1;
142 if(cnf->value && !strcmp(cnf->value, "always"))
143 issuer = 2;
144 }
145 else
146 {
147 OPENSSL_PUT_ERROR(X509V3, v2i_AUTHORITY_KEYID, X509V3_R_UNKNOWN_OPTION);
148 ERR_add_error_data(2, "name=", cnf->name);
149 return NULL;
150 }
151 }
152
153 if(!ctx || !ctx->issuer_cert)
154 {
155 if(ctx && (ctx->flags==CTX_TEST))
156 return AUTHORITY_KEYID_new();
157 OPENSSL_PUT_ERROR(X509V3, v2i_AUTHORITY_KEYID, X509V3_R_NO_ISSUER_CERTIFICATE);
158 return NULL;
159 }
160
161 cert = ctx->issuer_cert;
162
163 if(keyid)
164 {
165 j = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
166 if((j >= 0) && (ext = X509_get_ext(cert, j)))
167 ikeyid = X509V3_EXT_d2i(ext);
168 if(keyid==2 && !ikeyid)
169 {
170 OPENSSL_PUT_ERROR(X509V3, v2i_AUTHORITY_KEYID, X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
171 return NULL;
172 }
173 }
174
175 if((issuer && !ikeyid) || (issuer == 2))
176 {
177 isname = X509_NAME_dup(X509_get_issuer_name(cert));
178 serial = M_ASN1_INTEGER_dup(X509_get_serialNumber(cert));
179 if(!isname || !serial)
180 {
181 OPENSSL_PUT_ERROR(X509V3, v2i_AUTHORITY_KEYID, X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
182 goto err;
183 }
184 }
185
186 if(!(akeyid = AUTHORITY_KEYID_new())) goto err;
187
188 if(isname)
189 {
190 if(!(gens = sk_GENERAL_NAME_new_null())
191 || !(gen = GENERAL_NAME_new())
192 || !sk_GENERAL_NAME_push(gens, gen))
193 {
194 OPENSSL_PUT_ERROR(X509V3, v2i_AUTHORITY_KEYID, ERR_R_MALLOC_FAILURE);
195 goto err;
196 }
197 gen->type = GEN_DIRNAME;
198 gen->d.dirn = isname;
199 }
200
201 akeyid->issuer = gens;
202 akeyid->serial = serial;
203 akeyid->keyid = ikeyid;
204
205 return akeyid;
206
207 err:
208 X509_NAME_free(isname);
209 M_ASN1_INTEGER_free(serial);
210 M_ASN1_OCTET_STRING_free(ikeyid);
211 return NULL;
212 }
213