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
|
/*
* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (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 <openssl/core_numbers.h>
#include <openssl/core_names.h>
#include <openssl/bn.h>
#include <openssl/dh.h>
#include <openssl/params.h>
#include "internal/provider_algs.h"
static OSSL_OP_keymgmt_importkey_fn dh_importkey;
static int params_to_key(DH *dh, const OSSL_PARAM params[])
{
const OSSL_PARAM *param_p, *param_g, *param_priv_key, *param_pub_key;
BIGNUM *p = NULL, *g = NULL, *priv_key = NULL, *pub_key = NULL;
if (dh == NULL)
return 0;
param_p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DH_P);
param_g = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DH_G);
param_priv_key =
OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DH_PRIV_KEY);
param_pub_key =
OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DH_PUB_KEY);
/*
* DH documentation says that a public key must be present if a
* private key is present.
* We want to have at least a public key either way, so we end up
* requiring it unconditionally.
*/
if (param_pub_key == NULL)
return 0;
if ((param_p != NULL && !OSSL_PARAM_get_BN(param_p, &p))
|| (param_g != NULL && !OSSL_PARAM_get_BN(param_g, &g))
|| (param_priv_key != NULL
&& !OSSL_PARAM_get_BN(param_priv_key, &priv_key))
|| !OSSL_PARAM_get_BN(param_pub_key, &pub_key))
goto err;
if (!DH_set0_pqg(dh, p, NULL, g))
goto err;
p = g = NULL;
if (!DH_set0_key(dh, pub_key, priv_key))
goto err;
priv_key = pub_key = NULL;
return 1;
err:
BN_free(p);
BN_free(g);
BN_free(priv_key);
BN_free(pub_key);
return 0;
}
static void *dh_importkey(void *provctx, const OSSL_PARAM params[])
{
DH *dh;
if ((dh = DH_new()) == NULL
|| !params_to_key(dh, params)) {
DH_free(dh);
dh = NULL;
}
return dh;
}
const OSSL_DISPATCH dh_keymgmt_functions[] = {
/*
* TODO(3.0) When implementing OSSL_FUNC_KEYMGMT_GENKEY, remember to also
* implement OSSL_FUNC_KEYMGMT_EXPORTKEY.
*/
{ OSSL_FUNC_KEYMGMT_IMPORTKEY, (void (*)(void))dh_importkey },
{ OSSL_FUNC_KEYMGMT_FREEKEY, (void (*)(void))DH_free },
{ 0, NULL }
};
|
