v3_skey.c revision 296465 
1/* v3_skey.c */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 1999.
5 */
6/* ====================================================================
7 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in
18 *    the documentation and/or other materials provided with the
19 *    distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 *    software must display the following acknowledgment:
23 *    "This product includes software developed by the OpenSSL Project
24 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 *    endorse or promote products derived from this software without
28 *    prior written permission. For written permission, please contact
29 *    licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 *    nor may "OpenSSL" appear in their names without prior written
33 *    permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 *    acknowledgment:
37 *    "This product includes software developed by the OpenSSL Project
38 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com).  This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60#include <stdio.h>
61#include "cryptlib.h"
62#include <openssl/x509v3.h>
63
64static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
65                                      X509V3_CTX *ctx, char *str);
66const X509V3_EXT_METHOD v3_skey_id = {
67    NID_subject_key_identifier, 0, ASN1_ITEM_ref(ASN1_OCTET_STRING),
68    0, 0, 0, 0,
69    (X509V3_EXT_I2S)i2s_ASN1_OCTET_STRING,
70    (X509V3_EXT_S2I)s2i_skey_id,
71    0, 0, 0, 0,
72    NULL
73};
74
75char *i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method, ASN1_OCTET_STRING *oct)
76{
77    return hex_to_string(oct->data, oct->length);
78}
79
80ASN1_OCTET_STRING *s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
81                                         X509V3_CTX *ctx, char *str)
82{
83    ASN1_OCTET_STRING *oct;
84    long length;
85
86    if (!(oct = M_ASN1_OCTET_STRING_new())) {
87        X509V3err(X509V3_F_S2I_ASN1_OCTET_STRING, ERR_R_MALLOC_FAILURE);
88        return NULL;
89    }
90
91    if (!(oct->data = string_to_hex(str, &length))) {
92        M_ASN1_OCTET_STRING_free(oct);
93        return NULL;
94    }
95
96    oct->length = length;
97
98    return oct;
99
100}
101
102static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
103                                      X509V3_CTX *ctx, char *str)
104{
105    ASN1_OCTET_STRING *oct;
106    ASN1_BIT_STRING *pk;
107    unsigned char pkey_dig[EVP_MAX_MD_SIZE];
108    unsigned int diglen;
109
110    if (strcmp(str, "hash"))
111        return s2i_ASN1_OCTET_STRING(method, ctx, str);
112
113    if (!(oct = M_ASN1_OCTET_STRING_new())) {
114        X509V3err(X509V3_F_S2I_SKEY_ID, ERR_R_MALLOC_FAILURE);
115        return NULL;
116    }
117
118    if (ctx && (ctx->flags == CTX_TEST))
119        return oct;
120
121    if (!ctx || (!ctx->subject_req && !ctx->subject_cert)) {
122        X509V3err(X509V3_F_S2I_SKEY_ID, X509V3_R_NO_PUBLIC_KEY);
123        goto err;
124    }
125
126    if (ctx->subject_req)
127        pk = ctx->subject_req->req_info->pubkey->public_key;
128    else
129        pk = ctx->subject_cert->cert_info->key->public_key;
130
131    if (!pk) {
132        X509V3err(X509V3_F_S2I_SKEY_ID, X509V3_R_NO_PUBLIC_KEY);
133        goto err;
134    }
135
136    EVP_Digest(pk->data, pk->length, pkey_dig, &diglen, EVP_sha1(), NULL);
137
138    if (!M_ASN1_OCTET_STRING_set(oct, pkey_dig, diglen)) {
139        X509V3err(X509V3_F_S2I_SKEY_ID, ERR_R_MALLOC_FAILURE);
140        goto err;
141    }
142
143    return oct;
144
145 err:
146    M_ASN1_OCTET_STRING_free(oct);
147    return NULL;
148}
149