1 /*
2 * Written by Dr Stephen N Henson (steve@openssl.org) 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 * 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 <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/x509v3.h>
66
67 #include "../x509/internal.h"
68 #include "internal.h"
69
70
i2s_ASN1_OCTET_STRING(const X509V3_EXT_METHOD * method,const ASN1_OCTET_STRING * oct)71 char *i2s_ASN1_OCTET_STRING(const X509V3_EXT_METHOD *method,
72 const ASN1_OCTET_STRING *oct) {
73 return x509v3_bytes_to_hex(oct->data, oct->length);
74 }
75
s2i_ASN1_OCTET_STRING(const X509V3_EXT_METHOD * method,const X509V3_CTX * ctx,const char * str)76 ASN1_OCTET_STRING *s2i_ASN1_OCTET_STRING(const X509V3_EXT_METHOD *method,
77 const X509V3_CTX *ctx,
78 const char *str) {
79 size_t len;
80 uint8_t *data = x509v3_hex_to_bytes(str, &len);
81 if (data == NULL) {
82 return NULL;
83 }
84 if (len > INT_MAX) {
85 OPENSSL_PUT_ERROR(X509V3, ERR_R_OVERFLOW);
86 goto err;
87 }
88
89 ASN1_OCTET_STRING *oct = ASN1_OCTET_STRING_new();
90 if (oct == NULL) {
91 goto err;
92 }
93 ASN1_STRING_set0(oct, data, (int)len);
94 return oct;
95
96 err:
97 OPENSSL_free(data);
98 return NULL;
99 }
100
i2s_ASN1_OCTET_STRING_cb(const X509V3_EXT_METHOD * method,void * ext)101 static char *i2s_ASN1_OCTET_STRING_cb(const X509V3_EXT_METHOD *method,
102 void *ext) {
103 return i2s_ASN1_OCTET_STRING(method, ext);
104 }
105
s2i_skey_id(const X509V3_EXT_METHOD * method,const X509V3_CTX * ctx,const char * str)106 static void *s2i_skey_id(const X509V3_EXT_METHOD *method, const X509V3_CTX *ctx,
107 const char *str) {
108 ASN1_OCTET_STRING *oct;
109 ASN1_BIT_STRING *pk;
110 unsigned char pkey_dig[EVP_MAX_MD_SIZE];
111 unsigned int diglen;
112
113 if (strcmp(str, "hash")) {
114 return s2i_ASN1_OCTET_STRING(method, ctx, str);
115 }
116
117 if (!(oct = ASN1_OCTET_STRING_new())) {
118 return NULL;
119 }
120
121 if (ctx && (ctx->flags == X509V3_CTX_TEST)) {
122 return oct;
123 }
124
125 if (!ctx || (!ctx->subject_req && !ctx->subject_cert)) {
126 OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_PUBLIC_KEY);
127 goto err;
128 }
129
130 if (ctx->subject_req) {
131 pk = ctx->subject_req->req_info->pubkey->public_key;
132 } else {
133 pk = ctx->subject_cert->cert_info->key->public_key;
134 }
135
136 if (!pk) {
137 OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_PUBLIC_KEY);
138 goto err;
139 }
140
141 if (!EVP_Digest(pk->data, pk->length, pkey_dig, &diglen, EVP_sha1(), NULL)) {
142 goto err;
143 }
144
145 if (!ASN1_OCTET_STRING_set(oct, pkey_dig, diglen)) {
146 goto err;
147 }
148
149 return oct;
150
151 err:
152 ASN1_OCTET_STRING_free(oct);
153 return NULL;
154 }
155
156 const X509V3_EXT_METHOD v3_skey_id = {
157 NID_subject_key_identifier,
158 0,
159 ASN1_ITEM_ref(ASN1_OCTET_STRING),
160 0,
161 0,
162 0,
163 0,
164 i2s_ASN1_OCTET_STRING_cb,
165 s2i_skey_id,
166 0,
167 0,
168 0,
169 0,
170 NULL,
171 };
172