1 /* $OpenBSD: evp_pkey.c,v 1.33 2025/02/04 04:51:34 tb Exp $ */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 1999.
4 */
5 /* ====================================================================
6 * Copyright (c) 1999-2005 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 <stdlib.h>
61 #include <string.h>
62
63 #include <openssl/err.h>
64 #include <openssl/x509.h>
65
66 #include "asn1_local.h"
67 #include "evp_local.h"
68
69 /* Extract a private key from a PKCS8 structure */
70
71 EVP_PKEY *
EVP_PKCS82PKEY(const PKCS8_PRIV_KEY_INFO * p8)72 EVP_PKCS82PKEY(const PKCS8_PRIV_KEY_INFO *p8)
73 {
74 EVP_PKEY *pkey = NULL;
75 const ASN1_OBJECT *algoid;
76 char obj_tmp[80];
77
78 if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8))
79 return NULL;
80
81 if (!(pkey = EVP_PKEY_new())) {
82 EVPerror(ERR_R_MALLOC_FAILURE);
83 return NULL;
84 }
85
86 if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(algoid))) {
87 EVPerror(EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
88 if (i2t_ASN1_OBJECT(obj_tmp, sizeof(obj_tmp), algoid) == 0)
89 (void)strlcpy(obj_tmp, "unknown", sizeof(obj_tmp));
90 ERR_asprintf_error_data("TYPE=%s", obj_tmp);
91 goto error;
92 }
93
94 if (pkey->ameth->priv_decode) {
95 if (!pkey->ameth->priv_decode(pkey, p8)) {
96 EVPerror(EVP_R_PRIVATE_KEY_DECODE_ERROR);
97 goto error;
98 }
99 } else {
100 EVPerror(EVP_R_METHOD_NOT_SUPPORTED);
101 goto error;
102 }
103
104 return pkey;
105
106 error:
107 EVP_PKEY_free(pkey);
108 return NULL;
109 }
110 LCRYPTO_ALIAS(EVP_PKCS82PKEY);
111
112 /* Turn a private key into a PKCS8 structure */
113
114 PKCS8_PRIV_KEY_INFO *
EVP_PKEY2PKCS8(EVP_PKEY * pkey)115 EVP_PKEY2PKCS8(EVP_PKEY *pkey)
116 {
117 PKCS8_PRIV_KEY_INFO *p8;
118
119 if (!(p8 = PKCS8_PRIV_KEY_INFO_new())) {
120 EVPerror(ERR_R_MALLOC_FAILURE);
121 return NULL;
122 }
123
124 if (pkey->ameth) {
125 if (pkey->ameth->priv_encode) {
126 if (!pkey->ameth->priv_encode(p8, pkey)) {
127 EVPerror(EVP_R_PRIVATE_KEY_ENCODE_ERROR);
128 goto error;
129 }
130 } else {
131 EVPerror(EVP_R_METHOD_NOT_SUPPORTED);
132 goto error;
133 }
134 } else {
135 EVPerror(EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
136 goto error;
137 }
138 return p8;
139
140 error:
141 PKCS8_PRIV_KEY_INFO_free(p8);
142 return NULL;
143 }
144 LCRYPTO_ALIAS(EVP_PKEY2PKCS8);
145