1 /*
2 * Written by Dr Stephen N Henson ([email protected]) for the OpenSSL project
3 * 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 * [email protected].
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 * ([email protected]). This product includes software written by Tim
55 * Hudson ([email protected]). */
56
57 #include <limits.h>
58 #include <stdio.h>
59 #include <string.h>
60
61 #include <openssl/digest.h>
62 #include <openssl/err.h>
63 #include <openssl/obj.h>
64 #include <openssl/mem.h>
65 #include <openssl/x509.h>
66
67 #include "internal.h"
68
69
i2s_ASN1_OCTET_STRING(const X509V3_EXT_METHOD * method,const ASN1_OCTET_STRING * oct)70 char *i2s_ASN1_OCTET_STRING(const X509V3_EXT_METHOD *method,
71 const ASN1_OCTET_STRING *oct) {
72 return x509v3_bytes_to_hex(oct->data, oct->length);
73 }
74
s2i_ASN1_OCTET_STRING(const X509V3_EXT_METHOD * method,const X509V3_CTX * ctx,const char * str)75 ASN1_OCTET_STRING *s2i_ASN1_OCTET_STRING(const X509V3_EXT_METHOD *method,
76 const X509V3_CTX *ctx,
77 const char *str) {
78 size_t len;
79 uint8_t *data = x509v3_hex_to_bytes(str, &len);
80 if (data == NULL) {
81 return NULL;
82 }
83 if (len > INT_MAX) {
84 OPENSSL_PUT_ERROR(X509V3, ERR_R_OVERFLOW);
85 goto err;
86 }
87
88 ASN1_OCTET_STRING *oct = ASN1_OCTET_STRING_new();
89 if (oct == NULL) {
90 goto err;
91 }
92 ASN1_STRING_set0(oct, data, (int)len);
93 return oct;
94
95 err:
96 OPENSSL_free(data);
97 return NULL;
98 }
99
i2s_ASN1_OCTET_STRING_cb(const X509V3_EXT_METHOD * method,void * ext)100 static char *i2s_ASN1_OCTET_STRING_cb(const X509V3_EXT_METHOD *method,
101 void *ext) {
102 return i2s_ASN1_OCTET_STRING(method, ext);
103 }
104
s2i_skey_id(const X509V3_EXT_METHOD * method,const X509V3_CTX * ctx,const char * str)105 static void *s2i_skey_id(const X509V3_EXT_METHOD *method, const X509V3_CTX *ctx,
106 const char *str) {
107 ASN1_OCTET_STRING *oct;
108 ASN1_BIT_STRING *pk;
109 unsigned char pkey_dig[EVP_MAX_MD_SIZE];
110 unsigned int diglen;
111
112 if (strcmp(str, "hash")) {
113 return s2i_ASN1_OCTET_STRING(method, ctx, str);
114 }
115
116 if (!(oct = ASN1_OCTET_STRING_new())) {
117 return NULL;
118 }
119
120 if (ctx && (ctx->flags == X509V3_CTX_TEST)) {
121 return oct;
122 }
123
124 if (!ctx || (!ctx->subject_req && !ctx->subject_cert)) {
125 OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_PUBLIC_KEY);
126 goto err;
127 }
128
129 if (ctx->subject_req) {
130 pk = ctx->subject_req->req_info->pubkey->public_key;
131 } else {
132 pk = ctx->subject_cert->cert_info->key->public_key;
133 }
134
135 if (!pk) {
136 OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_PUBLIC_KEY);
137 goto err;
138 }
139
140 if (!EVP_Digest(pk->data, pk->length, pkey_dig, &diglen, EVP_sha1(), NULL)) {
141 goto err;
142 }
143
144 if (!ASN1_OCTET_STRING_set(oct, pkey_dig, diglen)) {
145 goto err;
146 }
147
148 return oct;
149
150 err:
151 ASN1_OCTET_STRING_free(oct);
152 return NULL;
153 }
154
155 const X509V3_EXT_METHOD v3_skey_id = {
156 NID_subject_key_identifier,
157 0,
158 ASN1_ITEM_ref(ASN1_OCTET_STRING),
159 0,
160 0,
161 0,
162 0,
163 i2s_ASN1_OCTET_STRING_cb,
164 s2i_skey_id,
165 0,
166 0,
167 0,
168 0,
169 NULL,
170 };
171