1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/bn.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/engine.h>
#include <openssl/x509.h>
#include <openssl/asn1.h>
#include "crypto/asn1.h"
#include "crypto/evp.h"
EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
long length)
{
EVP_PKEY *ret;
const unsigned char *p = *pp;
if ((a == NULL) || (*a == NULL)) {
if ((ret = EVP_PKEY_new()) == NULL) {
ASN1err(ASN1_F_D2I_PRIVATEKEY, ERR_R_EVP_LIB);
return NULL;
}
} else {
ret = *a;
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(ret->engine);
ret->engine = NULL;
#endif
}
if (!EVP_PKEY_set_type(ret, type)) {
ASN1err(ASN1_F_D2I_PRIVATEKEY, ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
goto err;
}
if (!ret->ameth->old_priv_decode ||
!ret->ameth->old_priv_decode(ret, &p, length)) {
if (ret->ameth->priv_decode) {
EVP_PKEY *tmp;
PKCS8_PRIV_KEY_INFO *p8 = NULL;
p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, length);
if (!p8)
goto err;
tmp = EVP_PKCS82PKEY(p8);
PKCS8_PRIV_KEY_INFO_free(p8);
if (tmp == NULL)
goto err;
EVP_PKEY_free(ret);
ret = tmp;
if (EVP_PKEY_type(type) != EVP_PKEY_base_id(ret))
goto err;
} else {
ASN1err(ASN1_F_D2I_PRIVATEKEY, ERR_R_ASN1_LIB);
goto err;
}
}
*pp = p;
if (a != NULL)
(*a) = ret;
return ret;
err:
if (a == NULL || *a != ret)
EVP_PKEY_free(ret);
return NULL;
}
/*
* This works like d2i_PrivateKey() except it automatically works out the
* type
*/
static EVP_PKEY *key_as_pkcs8(const unsigned char **pp, long length, int *carry_on)
{
const unsigned char *p = *pp;
PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, length);
EVP_PKEY *ret;
if (p8 == NULL)
return NULL;
ret = EVP_PKCS82PKEY(p8);
if (ret == NULL)
*carry_on = 0;
PKCS8_PRIV_KEY_INFO_free(p8);
if (ret != NULL)
*pp = p;
return ret;
}
EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
long length)
{
STACK_OF(ASN1_TYPE) *inkey;
const unsigned char *p;
int keytype;
EVP_PKEY *ret = NULL;
int carry_on = 1;
ERR_set_mark();
ret = key_as_pkcs8(pp, length, &carry_on);
if (ret != NULL) {
ERR_clear_last_mark();
if (a != NULL)
*a = ret;
return ret;
}
if (carry_on == 0) {
ERR_clear_last_mark();
ASN1err(ASN1_F_D2I_AUTOPRIVATEKEY,
ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
return NULL;
}
p = *pp;
/*
* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE): by
* analyzing it we can determine the passed structure: this assumes the
* input is surrounded by an ASN1 SEQUENCE.
*/
inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, length);
p = *pp;
/*
* Since we only need to discern "traditional format" RSA and DSA keys we
* can just count the elements.
*/
if (sk_ASN1_TYPE_num(inkey) == 6)
keytype = EVP_PKEY_DSA;
else if (sk_ASN1_TYPE_num(inkey) == 4)
keytype = EVP_PKEY_EC;
else
keytype = EVP_PKEY_RSA;
sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
ret = d2i_PrivateKey(keytype, a, pp, length);
if (ret != NULL)
ERR_pop_to_mark();
else
ERR_clear_last_mark();
return ret;
}
|
