1 /* $OpenBSD: evp_pkey.c,v 1.24 2021/12/12 21:30:13 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
62 #include <openssl/err.h>
63 #include <openssl/x509.h>
64
65 #include "asn1_locl.h"
66 #include "evp_locl.h"
67
68 /* Extract a private key from a PKCS8 structure */
69
70 EVP_PKEY *
EVP_PKCS82PKEY(const PKCS8_PRIV_KEY_INFO * p8)71 EVP_PKCS82PKEY(const PKCS8_PRIV_KEY_INFO *p8)
72 {
73 EVP_PKEY *pkey = NULL;
74 const ASN1_OBJECT *algoid;
75 char obj_tmp[80];
76
77 if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8))
78 return NULL;
79
80 if (!(pkey = EVP_PKEY_new())) {
81 EVPerror(ERR_R_MALLOC_FAILURE);
82 return NULL;
83 }
84
85 if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(algoid))) {
86 EVPerror(EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
87 i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
88 ERR_asprintf_error_data("TYPE=%s", obj_tmp);
89 goto error;
90 }
91
92 if (pkey->ameth->priv_decode) {
93 if (!pkey->ameth->priv_decode(pkey, p8)) {
94 EVPerror(EVP_R_PRIVATE_KEY_DECODE_ERROR);
95 goto error;
96 }
97 } else {
98 EVPerror(EVP_R_METHOD_NOT_SUPPORTED);
99 goto error;
100 }
101
102 return pkey;
103
104 error:
105 EVP_PKEY_free(pkey);
106 return NULL;
107 }
108
109 /* Turn a private key into a PKCS8 structure */
110
111 PKCS8_PRIV_KEY_INFO *
EVP_PKEY2PKCS8(EVP_PKEY * pkey)112 EVP_PKEY2PKCS8(EVP_PKEY *pkey)
113 {
114 PKCS8_PRIV_KEY_INFO *p8;
115
116 if (!(p8 = PKCS8_PRIV_KEY_INFO_new())) {
117 EVPerror(ERR_R_MALLOC_FAILURE);
118 return NULL;
119 }
120
121 if (pkey->ameth) {
122 if (pkey->ameth->priv_encode) {
123 if (!pkey->ameth->priv_encode(p8, pkey)) {
124 EVPerror(EVP_R_PRIVATE_KEY_ENCODE_ERROR);
125 goto error;
126 }
127 } else {
128 EVPerror(EVP_R_METHOD_NOT_SUPPORTED);
129 goto error;
130 }
131 } else {
132 EVPerror(EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
133 goto error;
134 }
135 return p8;
136
137 error:
138 PKCS8_PRIV_KEY_INFO_free(p8);
139 return NULL;
140 }
141
142 /* EVP_PKEY attribute functions */
143
144 int
EVP_PKEY_get_attr_count(const EVP_PKEY * key)145 EVP_PKEY_get_attr_count(const EVP_PKEY *key)
146 {
147 return X509at_get_attr_count(key->attributes);
148 }
149
150 int
EVP_PKEY_get_attr_by_NID(const EVP_PKEY * key,int nid,int lastpos)151 EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid, int lastpos)
152 {
153 return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
154 }
155
156 int
EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY * key,const ASN1_OBJECT * obj,int lastpos)157 EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, const ASN1_OBJECT *obj,
158 int lastpos)
159 {
160 return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
161 }
162
163 X509_ATTRIBUTE *
EVP_PKEY_get_attr(const EVP_PKEY * key,int loc)164 EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
165 {
166 return X509at_get_attr(key->attributes, loc);
167 }
168
169 X509_ATTRIBUTE *
EVP_PKEY_delete_attr(EVP_PKEY * key,int loc)170 EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
171 {
172 return X509at_delete_attr(key->attributes, loc);
173 }
174
175 int
EVP_PKEY_add1_attr(EVP_PKEY * key,X509_ATTRIBUTE * attr)176 EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
177 {
178 if (X509at_add1_attr(&key->attributes, attr))
179 return 1;
180 return 0;
181 }
182
183 int
EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY * key,const ASN1_OBJECT * obj,int type,const unsigned char * bytes,int len)184 EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key, const ASN1_OBJECT *obj, int type,
185 const unsigned char *bytes, int len)
186 {
187 if (X509at_add1_attr_by_OBJ(&key->attributes, obj, type, bytes, len))
188 return 1;
189 return 0;
190 }
191
192 int
EVP_PKEY_add1_attr_by_NID(EVP_PKEY * key,int nid,int type,const unsigned char * bytes,int len)193 EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key, int nid, int type,
194 const unsigned char *bytes, int len)
195 {
196 if (X509at_add1_attr_by_NID(&key->attributes, nid, type, bytes, len))
197 return 1;
198 return 0;
199 }
200
201 int
EVP_PKEY_add1_attr_by_txt(EVP_PKEY * key,const char * attrname,int type,const unsigned char * bytes,int len)202 EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key, const char *attrname, int type,
203 const unsigned char *bytes, int len)
204 {
205 if (X509at_add1_attr_by_txt(&key->attributes, attrname, type,
206 bytes, len))
207 return 1;
208 return 0;
209 }
210