1 /* $OpenBSD: d2i_pr.c,v 1.17 2019/04/10 16:23:55 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
76 EVP_PKEY *
d2i_PrivateKey(int type,EVP_PKEY ** a,const unsigned char ** pp,long length)77 d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp, long length)
78 {
79 const unsigned char *p = *pp;
80 EVP_PKEY *ret;
81
82 if ((a == NULL) || (*a == NULL)) {
83 if ((ret = EVP_PKEY_new()) == NULL) {
84 ASN1error(ERR_R_EVP_LIB);
85 return (NULL);
86 }
87 } else {
88 ret = *a;
89 #ifndef OPENSSL_NO_ENGINE
90 ENGINE_finish(ret->engine);
91 ret->engine = NULL;
92 #endif
93 }
94
95 if (!EVP_PKEY_set_type(ret, type)) {
96 ASN1error(ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
97 goto err;
98 }
99
100 if (!ret->ameth->old_priv_decode ||
101 !ret->ameth->old_priv_decode(ret, pp, length)) {
102 if (ret->ameth->priv_decode) {
103 PKCS8_PRIV_KEY_INFO *p8 = NULL;
104 *pp = p; /* XXX */
105 p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, pp, length);
106 if (!p8)
107 goto err;
108 EVP_PKEY_free(ret);
109 ret = EVP_PKCS82PKEY(p8);
110 PKCS8_PRIV_KEY_INFO_free(p8);
111 } else {
112 ASN1error(ERR_R_ASN1_LIB);
113 goto err;
114 }
115 }
116 if (a != NULL)
117 (*a) = ret;
118 return (ret);
119
120 err:
121 if (a == NULL || *a != ret)
122 EVP_PKEY_free(ret);
123 return (NULL);
124 }
125
126 /* This works like d2i_PrivateKey() except it automatically works out the type */
127
128 EVP_PKEY *
d2i_AutoPrivateKey(EVP_PKEY ** a,const unsigned char ** pp,long length)129 d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp, long length)
130 {
131 STACK_OF(ASN1_TYPE) *inkey;
132 const unsigned char *p;
133 int keytype;
134
135 p = *pp;
136 /* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE):
137 * by analyzing it we can determine the passed structure: this
138 * assumes the input is surrounded by an ASN1 SEQUENCE.
139 */
140 inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, length);
141 /* Since we only need to discern "traditional format" RSA and DSA
142 * keys we can just count the elements.
143 */
144 if (sk_ASN1_TYPE_num(inkey) == 6)
145 keytype = EVP_PKEY_DSA;
146 else if (sk_ASN1_TYPE_num(inkey) == 4)
147 keytype = EVP_PKEY_EC;
148 else if (sk_ASN1_TYPE_num(inkey) == 3) {
149 /* This seems to be PKCS8, not traditional format */
150 PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(
151 NULL, pp, length);
152 EVP_PKEY *ret;
153
154 sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
155 if (!p8) {
156 ASN1error(ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
157 return NULL;
158 }
159 ret = EVP_PKCS82PKEY(p8);
160 PKCS8_PRIV_KEY_INFO_free(p8);
161 if (a) {
162 *a = ret;
163 }
164 return ret;
165 } else
166 keytype = EVP_PKEY_RSA;
167 sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
168 return d2i_PrivateKey(keytype, a, pp, length);
169 }
170