1 /* $OpenBSD: a_pkey.c,v 1.3 2021/12/25 13:17:48 jsing Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59 #include <stdio.h>
60
61 #include <openssl/opensslconf.h>
62
63 #include <openssl/asn1.h>
64 #include <openssl/bn.h>
65 #include <openssl/err.h>
66 #include <openssl/evp.h>
67 #include <openssl/objects.h>
68 #include <openssl/x509.h>
69
70 #ifndef OPENSSL_NO_ENGINE
71 #include <openssl/engine.h>
72 #endif
73
74 #include "asn1_locl.h"
75 #include "evp_locl.h"
76
77 EVP_PKEY *
d2i_PrivateKey(int type,EVP_PKEY ** a,const unsigned char ** pp,long length)78 d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp, long length)
79 {
80 const unsigned char *p = *pp;
81 EVP_PKEY *ret;
82
83 if ((a == NULL) || (*a == NULL)) {
84 if ((ret = EVP_PKEY_new()) == NULL) {
85 ASN1error(ERR_R_EVP_LIB);
86 return (NULL);
87 }
88 } else {
89 ret = *a;
90 #ifndef OPENSSL_NO_ENGINE
91 ENGINE_finish(ret->engine);
92 ret->engine = NULL;
93 #endif
94 }
95
96 if (!EVP_PKEY_set_type(ret, type)) {
97 ASN1error(ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
98 goto err;
99 }
100
101 if (!ret->ameth->old_priv_decode ||
102 !ret->ameth->old_priv_decode(ret, pp, length)) {
103 if (ret->ameth->priv_decode) {
104 PKCS8_PRIV_KEY_INFO *p8 = NULL;
105 *pp = p; /* XXX */
106 p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, pp, length);
107 if (!p8)
108 goto err;
109 EVP_PKEY_free(ret);
110 ret = EVP_PKCS82PKEY(p8);
111 PKCS8_PRIV_KEY_INFO_free(p8);
112 } else {
113 ASN1error(ERR_R_ASN1_LIB);
114 goto err;
115 }
116 }
117 if (a != NULL)
118 (*a) = ret;
119 return (ret);
120
121 err:
122 if (a == NULL || *a != ret)
123 EVP_PKEY_free(ret);
124 return (NULL);
125 }
126
127 int
i2d_PrivateKey(EVP_PKEY * a,unsigned char ** pp)128 i2d_PrivateKey(EVP_PKEY *a, unsigned char **pp)
129 {
130 if (a->ameth && a->ameth->old_priv_encode) {
131 return a->ameth->old_priv_encode(a, pp);
132 }
133 if (a->ameth && a->ameth->priv_encode) {
134 PKCS8_PRIV_KEY_INFO *p8 = EVP_PKEY2PKCS8(a);
135 int ret = i2d_PKCS8_PRIV_KEY_INFO(p8, pp);
136 PKCS8_PRIV_KEY_INFO_free(p8);
137 return ret;
138 }
139 ASN1error(ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
140 return (-1);
141 }
142
143 /* This works like d2i_PrivateKey() except it automatically works out the type */
144
145 EVP_PKEY *
d2i_AutoPrivateKey(EVP_PKEY ** a,const unsigned char ** pp,long length)146 d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp, long length)
147 {
148 STACK_OF(ASN1_TYPE) *inkey;
149 const unsigned char *p;
150 int keytype;
151
152 p = *pp;
153 /* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE):
154 * by analyzing it we can determine the passed structure: this
155 * assumes the input is surrounded by an ASN1 SEQUENCE.
156 */
157 inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, length);
158 /* Since we only need to discern "traditional format" RSA and DSA
159 * keys we can just count the elements.
160 */
161 if (sk_ASN1_TYPE_num(inkey) == 6)
162 keytype = EVP_PKEY_DSA;
163 else if (sk_ASN1_TYPE_num(inkey) == 4)
164 keytype = EVP_PKEY_EC;
165 else if (sk_ASN1_TYPE_num(inkey) == 3) {
166 /* This seems to be PKCS8, not traditional format */
167 PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(
168 NULL, pp, length);
169 EVP_PKEY *ret;
170
171 sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
172 if (!p8) {
173 ASN1error(ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
174 return NULL;
175 }
176 ret = EVP_PKCS82PKEY(p8);
177 PKCS8_PRIV_KEY_INFO_free(p8);
178 if (a) {
179 *a = ret;
180 }
181 return ret;
182 } else
183 keytype = EVP_PKEY_RSA;
184 sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
185 return d2i_PrivateKey(keytype, a, pp, length);
186 }
187