Initial support for ASN1_ITEM_FUNCTION option to
[openssl.git] / crypto / x509v3 / v3_akey.c
1 /* v3_akey.c */
2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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 X509V3_EXT_METHOD v3_akey_id = {
72 NID_authority_key_identifier, X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID),
73 0,0,0,0,
74 0,0,
75 (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID,
76 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
77 0,0,
78 NULL
79 };
80
81 ASN1_SEQUENCE(AUTHORITY_KEYID) = {
82         ASN1_IMP_OPT(AUTHORITY_KEYID, keyid, ASN1_OCTET_STRING, 0),
83         ASN1_IMP_SEQUENCE_OF_OPT(AUTHORITY_KEYID, issuer, GENERAL_NAME, 1),
84         ASN1_IMP_OPT(AUTHORITY_KEYID, serial, ASN1_INTEGER, 2)
85 } ASN1_SEQUENCE_END(AUTHORITY_KEYID);
86
87 IMPLEMENT_ASN1_FUNCTIONS(AUTHORITY_KEYID)
88
89 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
90              AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist)
91 {
92         char *tmp;
93         if(akeyid->keyid) {
94                 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length);
95                 X509V3_add_value("keyid", tmp, &extlist);
96                 OPENSSL_free(tmp);
97         }
98         if(akeyid->issuer) 
99                 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
100         if(akeyid->serial) {
101                 tmp = hex_to_string(akeyid->serial->data,
102                                                  akeyid->serial->length);
103                 X509V3_add_value("serial", tmp, &extlist);
104                 OPENSSL_free(tmp);
105         }
106         return extlist;
107 }
108
109 /* Currently two options:
110  * keyid: use the issuers subject keyid, the value 'always' means its is
111  * an error if the issuer certificate doesn't have a key id.
112  * issuer: use the issuers cert issuer and serial number. The default is
113  * to only use this if keyid is not present. With the option 'always'
114  * this is always included.
115  */
116
117 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
118              X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values)
119 {
120 char keyid=0, issuer=0;
121 int i;
122 CONF_VALUE *cnf;
123 ASN1_OCTET_STRING *ikeyid = NULL;
124 X509_NAME *isname = NULL;
125 GENERAL_NAMES * gens = NULL;
126 GENERAL_NAME *gen = NULL;
127 ASN1_INTEGER *serial = NULL;
128 X509_EXTENSION *ext;
129 X509 *cert;
130 AUTHORITY_KEYID *akeyid;
131 for(i = 0; i < sk_CONF_VALUE_num(values); i++) {
132         cnf = sk_CONF_VALUE_value(values, i);
133         if(!strcmp(cnf->name, "keyid")) {
134                 keyid = 1;
135                 if(cnf->value && !strcmp(cnf->value, "always")) keyid = 2;
136         } else if(!strcmp(cnf->name, "issuer")) {
137                 issuer = 1;
138                 if(cnf->value && !strcmp(cnf->value, "always")) issuer = 2;
139         } else {
140                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNKNOWN_OPTION);
141                 ERR_add_error_data(2, "name=", cnf->name);
142                 return NULL;
143         }
144 }
145
146 if(!ctx || !ctx->issuer_cert) {
147         if(ctx && (ctx->flags==CTX_TEST)) return AUTHORITY_KEYID_new();
148         X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_NO_ISSUER_CERTIFICATE);
149         return NULL;
150 }
151
152 cert = ctx->issuer_cert;
153
154 if(keyid) {
155         i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
156         if((i >= 0)  && (ext = X509_get_ext(cert, i)))
157                                                  ikeyid = X509V3_EXT_d2i(ext);
158         if(keyid==2 && !ikeyid) {
159                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
160                 return NULL;
161         }
162 }
163
164 if((issuer && !ikeyid) || (issuer == 2)) {
165         isname = X509_NAME_dup(X509_get_issuer_name(cert));
166         serial = M_ASN1_INTEGER_dup(X509_get_serialNumber(cert));
167         if(!isname || !serial) {
168                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
169                 goto err;
170         }
171 }
172
173 if(!(akeyid = AUTHORITY_KEYID_new())) goto err;
174
175 if(isname) {
176         if(!(gens = sk_GENERAL_NAME_new_null()) || !(gen = GENERAL_NAME_new())
177                 || !sk_GENERAL_NAME_push(gens, gen)) {
178                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE);
179                 goto err;
180         }
181         gen->type = GEN_DIRNAME;
182         gen->d.dirn = isname;
183 }
184
185 akeyid->issuer = gens;
186 akeyid->serial = serial;
187 akeyid->keyid = ikeyid;
188
189 return akeyid;
190
191 err:
192 X509_NAME_free(isname);
193 M_ASN1_INTEGER_free(serial);
194 M_ASN1_OCTET_STRING_free(ikeyid);
195 return NULL;
196
197 }
198