1 /* v3_skey.c */
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 
60 #include <stdio.h>
61 #include "cryptlib.h"
62 #include <openssl/x509v3.h>
63 
64 static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, char *str);
65 const X509V3_EXT_METHOD v3_skey_id = {
66 NID_subject_key_identifier, 0, ASN1_ITEM_ref(ASN1_OCTET_STRING),
67 0,0,0,0,
68 (X509V3_EXT_I2S)i2s_ASN1_OCTET_STRING,
69 (X509V3_EXT_S2I)s2i_skey_id,
70 0,0,0,0,
71 NULL};
72 
73 char *i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
74 	     ASN1_OCTET_STRING *oct)
75 {
76 	return hex_to_string(oct->data, oct->length);
77 }
78 
79 ASN1_OCTET_STRING *s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
80 	     X509V3_CTX *ctx, char *str)
81 {
82 	ASN1_OCTET_STRING *oct;
83 	long length;
84 
85 	if(!(oct = M_ASN1_OCTET_STRING_new())) {
86 		X509V3err(X509V3_F_S2I_ASN1_OCTET_STRING,ERR_R_MALLOC_FAILURE);
87 		return NULL;
88 	}
89 
90 	if(!(oct->data = string_to_hex(str, &length))) {
91 		M_ASN1_OCTET_STRING_free(oct);
92 		return NULL;
93 	}
94 
95 	oct->length = length;
96 
97 	return oct;
98 
99 }
100 
101 static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
102 	     X509V3_CTX *ctx, char *str)
103 {
104 	ASN1_OCTET_STRING *oct;
105 	ASN1_BIT_STRING *pk;
106 	unsigned char pkey_dig[EVP_MAX_MD_SIZE];
107 	unsigned int diglen;
108 
109 	if(strcmp(str, "hash")) return s2i_ASN1_OCTET_STRING(method, ctx, str);
110 
111 	if(!(oct = M_ASN1_OCTET_STRING_new())) {
112 		X509V3err(X509V3_F_S2I_SKEY_ID,ERR_R_MALLOC_FAILURE);
113 		return NULL;
114 	}
115 
116 	if(ctx && (ctx->flags == CTX_TEST)) return oct;
117 
118 	if(!ctx || (!ctx->subject_req && !ctx->subject_cert)) {
119 		X509V3err(X509V3_F_S2I_SKEY_ID,X509V3_R_NO_PUBLIC_KEY);
120 		goto err;
121 	}
122 
123 	if(ctx->subject_req)
124 		pk = ctx->subject_req->req_info->pubkey->public_key;
125 	else pk = ctx->subject_cert->cert_info->key->public_key;
126 
127 	if(!pk) {
128 		X509V3err(X509V3_F_S2I_SKEY_ID,X509V3_R_NO_PUBLIC_KEY);
129 		goto err;
130 	}
131 
132 	if (!EVP_Digest(pk->data, pk->length, pkey_dig, &diglen, EVP_sha1(), NULL))
133 		goto err;
134 
135 	if(!M_ASN1_OCTET_STRING_set(oct, pkey_dig, diglen)) {
136 		X509V3err(X509V3_F_S2I_SKEY_ID,ERR_R_MALLOC_FAILURE);
137 		goto err;
138 	}
139 
140 	return oct;
141 
142 	err:
143 	M_ASN1_OCTET_STRING_free(oct);
144 	return NULL;
145 }
146