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1/* crypto/asn1/d2i_pr.c */
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#include "cryptlib.h"
61#include <openssl/bn.h>
62#include <openssl/evp.h>
63#include <openssl/objects.h>
64#ifndef OPENSSL_NO_ENGINE
65#include <openssl/engine.h>
66#endif
67#include <openssl/x509.h>
68#include <openssl/asn1.h>
69#include "asn1_locl.h"
70
71EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
72 long length)
73 {
74 EVP_PKEY *ret;
75
76 if ((a == NULL) || (*a == NULL))
77 {
78 if ((ret=EVP_PKEY_new()) == NULL)
79 {
80 ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_EVP_LIB);
81 return(NULL);
82 }
83 }
84 else
85 {
86 ret= *a;
87#ifndef OPENSSL_NO_ENGINE
88 if (ret->engine)
89 {
90 ENGINE_finish(ret->engine);
91 ret->engine = NULL;
92 }
93#endif
94 }
95
96 if (!EVP_PKEY_set_type(ret, type))
97 {
98 ASN1err(ASN1_F_D2I_PRIVATEKEY,ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
99 goto err;
100 }
101
102 if (!ret->ameth->old_priv_decode ||
103 !ret->ameth->old_priv_decode(ret, pp, length))
104 {
105 if (ret->ameth->priv_decode)
106 {
107 PKCS8_PRIV_KEY_INFO *p8=NULL;
108 p8=d2i_PKCS8_PRIV_KEY_INFO(NULL,pp,length);
109 if (!p8) goto err;
110 EVP_PKEY_free(ret);
111 ret = EVP_PKCS82PKEY(p8);
112 PKCS8_PRIV_KEY_INFO_free(p8);
113
114 }
115 else
116 {
117 ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_ASN1_LIB);
118 goto err;
119 }
120 }
121 if (a != NULL) (*a)=ret;
122 return(ret);
123err:
124 if ((ret != NULL) && ((a == NULL) || (*a != ret))) EVP_PKEY_free(ret);
125 return(NULL);
126 }
127
128/* This works like d2i_PrivateKey() except it automatically works out the type */
129
130EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
131 long length)
132{
133 STACK_OF(ASN1_TYPE) *inkey;
134 const unsigned char *p;
135 int keytype;
136 p = *pp;
137 /* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE):
138 * by analyzing it we can determine the passed structure: this
139 * assumes the input is surrounded by an ASN1 SEQUENCE.
140 */
141 inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, length);
142 /* Since we only need to discern "traditional format" RSA and DSA
143 * keys we can just count the elements.
144 */
145 if(sk_ASN1_TYPE_num(inkey) == 6)
146 keytype = EVP_PKEY_DSA;
147 else if (sk_ASN1_TYPE_num(inkey) == 4)
148 keytype = EVP_PKEY_EC;
149 else if (sk_ASN1_TYPE_num(inkey) == 3)
150 { /* This seems to be PKCS8, not traditional format */
151 PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL,pp,length);
152 EVP_PKEY *ret;
153
154 sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
155 if (!p8)
156 {
157 ASN1err(ASN1_F_D2I_AUTOPRIVATEKEY,ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
158 return NULL;
159 }
160 ret = EVP_PKCS82PKEY(p8);
161 PKCS8_PRIV_KEY_INFO_free(p8);
162 if (a) {
163 *a = ret;
164 }
165 return ret;
166 }
167 else keytype = EVP_PKEY_RSA;
168 sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
169 return d2i_PrivateKey(keytype, a, pp, length);
170}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-11-24 01:17:56 +0000