1 /* $OpenBSD: x509_skey.c,v 1.2 2021/11/01 20:53:08 tb Exp $ */
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 <string.h>
61
62 #include <openssl/err.h>
63 #include <openssl/x509v3.h>
64
65 #include "x509_lcl.h"
66
67 static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
68 X509V3_CTX *ctx, char *str);
69
70 const X509V3_EXT_METHOD v3_skey_id = {
71 .ext_nid = NID_subject_key_identifier,
72 .ext_flags = 0,
73 .it = &ASN1_OCTET_STRING_it,
74 .ext_new = NULL,
75 .ext_free = NULL,
76 .d2i = NULL,
77 .i2d = NULL,
78 .i2s = (X509V3_EXT_I2S)i2s_ASN1_OCTET_STRING,
79 .s2i = (X509V3_EXT_S2I)s2i_skey_id,
80 .i2v = NULL,
81 .v2i = NULL,
82 .i2r = NULL,
83 .r2i = NULL,
84 .usr_data = NULL,
85 };
86
87 char *
i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD * method,const ASN1_OCTET_STRING * oct)88 i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method, const ASN1_OCTET_STRING *oct)
89 {
90 return hex_to_string(oct->data, oct->length);
91 }
92
93 ASN1_OCTET_STRING *
s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD * method,X509V3_CTX * ctx,const char * str)94 s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
95 const char *str)
96 {
97 ASN1_OCTET_STRING *oct;
98 long length;
99
100 if (!(oct = ASN1_OCTET_STRING_new())) {
101 X509V3error(ERR_R_MALLOC_FAILURE);
102 return NULL;
103 }
104
105 if (!(oct->data = string_to_hex(str, &length))) {
106 ASN1_OCTET_STRING_free(oct);
107 return NULL;
108 }
109
110 oct->length = length;
111
112 return oct;
113 }
114
115 static ASN1_OCTET_STRING *
s2i_skey_id(X509V3_EXT_METHOD * method,X509V3_CTX * ctx,char * str)116 s2i_skey_id(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, char *str)
117 {
118 ASN1_OCTET_STRING *oct;
119 ASN1_BIT_STRING *pk;
120 unsigned char pkey_dig[EVP_MAX_MD_SIZE];
121 unsigned int diglen;
122
123 if (strcmp(str, "hash"))
124 return s2i_ASN1_OCTET_STRING(method, ctx, str);
125
126 if (!(oct = ASN1_OCTET_STRING_new())) {
127 X509V3error(ERR_R_MALLOC_FAILURE);
128 return NULL;
129 }
130
131 if (ctx && (ctx->flags == CTX_TEST))
132 return oct;
133
134 if (!ctx || (!ctx->subject_req && !ctx->subject_cert)) {
135 X509V3error(X509V3_R_NO_PUBLIC_KEY);
136 goto err;
137 }
138
139 if (ctx->subject_req)
140 pk = ctx->subject_req->req_info->pubkey->public_key;
141 else
142 pk = ctx->subject_cert->cert_info->key->public_key;
143
144 if (!pk) {
145 X509V3error(X509V3_R_NO_PUBLIC_KEY);
146 goto err;
147 }
148
149 if (!EVP_Digest(pk->data, pk->length, pkey_dig, &diglen,
150 EVP_sha1(), NULL))
151 goto err;
152
153 if (!ASN1_STRING_set(oct, pkey_dig, diglen)) {
154 X509V3error(ERR_R_MALLOC_FAILURE);
155 goto err;
156 }
157
158 return oct;
159
160 err:
161 ASN1_OCTET_STRING_free(oct);
162 return NULL;
163 }
164