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
66static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
67			AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist);
68static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
69			X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values);
70
71X509V3_EXT_METHOD v3_akey_id = {
72NID_authority_key_identifier, X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID),
730,0,0,0,
740,0,
75(X509V3_EXT_I2V)i2v_AUTHORITY_KEYID,
76(X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
770,0,
78NULL
79};
80
81static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
82	     AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist)
83{
84	char *tmp;
85	if(akeyid->keyid) {
86		tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length);
87		X509V3_add_value("keyid", tmp, &extlist);
88		OPENSSL_free(tmp);
89	}
90	if(akeyid->issuer)
91		extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
92	if(akeyid->serial) {
93		tmp = hex_to_string(akeyid->serial->data,
94						 akeyid->serial->length);
95		X509V3_add_value("serial", tmp, &extlist);
96		OPENSSL_free(tmp);
97	}
98	return extlist;
99}
100
101/* Currently two options:
102 * keyid: use the issuers subject keyid, the value 'always' means its is
103 * an error if the issuer certificate doesn't have a key id.
104 * issuer: use the issuers cert issuer and serial number. The default is
105 * to only use this if keyid is not present. With the option 'always'
106 * this is always included.
107 */
108
109static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
110	     X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values)
111{
112char keyid=0, issuer=0;
113int i;
114CONF_VALUE *cnf;
115ASN1_OCTET_STRING *ikeyid = NULL;
116X509_NAME *isname = NULL;
117GENERAL_NAMES * gens = NULL;
118GENERAL_NAME *gen = NULL;
119ASN1_INTEGER *serial = NULL;
120X509_EXTENSION *ext;
121X509 *cert;
122AUTHORITY_KEYID *akeyid;
123for(i = 0; i < sk_CONF_VALUE_num(values); i++) {
124	cnf = sk_CONF_VALUE_value(values, i);
125	if(!strcmp(cnf->name, "keyid")) {
126		keyid = 1;
127		if(cnf->value && !strcmp(cnf->value, "always")) keyid = 2;
128	} else if(!strcmp(cnf->name, "issuer")) {
129		issuer = 1;
130		if(cnf->value && !strcmp(cnf->value, "always")) issuer = 2;
131	} else {
132		X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNKNOWN_OPTION);
133		ERR_add_error_data(2, "name=", cnf->name);
134		return NULL;
135	}
136}
137
138if(!ctx || !ctx->issuer_cert) {
139	if(ctx && (ctx->flags==CTX_TEST)) return AUTHORITY_KEYID_new();
140	X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_NO_ISSUER_CERTIFICATE);
141	return NULL;
142}
143
144cert = ctx->issuer_cert;
145
146if(keyid) {
147	i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
148	if((i >= 0)  && (ext = X509_get_ext(cert, i)))
149						 ikeyid = X509V3_EXT_d2i(ext);
150	if(keyid==2 && !ikeyid) {
151		X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
152		return NULL;
153	}
154}
155
156if((issuer && !ikeyid) || (issuer == 2)) {
157	isname = X509_NAME_dup(X509_get_issuer_name(cert));
158	serial = M_ASN1_INTEGER_dup(X509_get_serialNumber(cert));
159	if(!isname || !serial) {
160		X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
161		goto err;
162	}
163}
164
165if(!(akeyid = AUTHORITY_KEYID_new())) goto err;
166
167if(isname) {
168	if(!(gens = sk_GENERAL_NAME_new_null()) || !(gen = GENERAL_NAME_new())
169		|| !sk_GENERAL_NAME_push(gens, gen)) {
170		X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE);
171		goto err;
172	}
173	gen->type = GEN_DIRNAME;
174	gen->d.dirn = isname;
175}
176
177akeyid->issuer = gens;
178akeyid->serial = serial;
179akeyid->keyid = ikeyid;
180
181return akeyid;
182
183err:
184X509_NAME_free(isname);
185M_ASN1_INTEGER_free(serial);
186M_ASN1_OCTET_STRING_free(ikeyid);
187return NULL;
188
189}
190
191