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
|
/*
* Copyright 2020 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/crypto.h>
#include <openssl/kdf.h>
#include <openssl/core_dispatch.h>
#include <openssl/core_names.h>
#include <openssl/params.h>
#include "prov/implementations.h"
#include "prov/provider_ctx.h"
#include "prov/kdfexchange.h"
static OSSL_FUNC_keyexch_newctx_fn kdf_newctx;
static OSSL_FUNC_keyexch_init_fn kdf_init;
static OSSL_FUNC_keyexch_derive_fn kdf_derive;
static OSSL_FUNC_keyexch_freectx_fn kdf_freectx;
static OSSL_FUNC_keyexch_dupctx_fn kdf_dupctx;
static OSSL_FUNC_keyexch_set_ctx_params_fn kdf_set_ctx_params;
static OSSL_FUNC_keyexch_settable_ctx_params_fn kdf_settable_ctx_params;
typedef struct {
void *provctx;
EVP_KDF_CTX *kdfctx;
KDF_DATA *kdfdata;
} PROV_KDF_CTX;
static void *kdf_newctx(void *provctx)
{
PROV_KDF_CTX *kdfctx = OPENSSL_zalloc(sizeof(PROV_KDF_CTX));
EVP_KDF *kdf = NULL;
if (kdfctx == NULL)
return NULL;
kdfctx->provctx = provctx;
kdf = EVP_KDF_fetch(PROV_LIBRARY_CONTEXT_OF(provctx), "TLS1-PRF", NULL);
if (kdf == NULL)
goto err;
kdfctx->kdfctx = EVP_KDF_new_ctx(kdf);
EVP_KDF_free(kdf);
if (kdfctx->kdfctx == NULL)
goto err;
return kdfctx;
err:
OPENSSL_free(kdfctx);
return NULL;
}
static int kdf_init(void *vpkdfctx, void *vkdf)
{
PROV_KDF_CTX *pkdfctx = (PROV_KDF_CTX *)vpkdfctx;
if (pkdfctx == NULL || vkdf == NULL || !kdf_data_up_ref(vkdf))
return 0;
pkdfctx->kdfdata = vkdf;
return 1;
}
static int kdf_derive(void *vpkdfctx, unsigned char *secret, size_t *secretlen,
size_t outlen)
{
PROV_KDF_CTX *pkdfctx = (PROV_KDF_CTX *)vpkdfctx;
return EVP_KDF_derive(pkdfctx->kdfctx, secret, *secretlen);
}
static void kdf_freectx(void *vpkdfctx)
{
PROV_KDF_CTX *pkdfctx = (PROV_KDF_CTX *)vpkdfctx;
EVP_KDF_CTX_free(pkdfctx->kdfctx);
kdf_data_free(pkdfctx->kdfdata);
OPENSSL_free(pkdfctx);
}
static void *kdf_dupctx(void *vpkdfctx)
{
PROV_KDF_CTX *srcctx = (PROV_KDF_CTX *)vpkdfctx;
PROV_KDF_CTX *dstctx;
dstctx = OPENSSL_zalloc(sizeof(*srcctx));
if (dstctx == NULL)
return NULL;
*dstctx = *srcctx;
dstctx->kdfctx = EVP_KDF_dup_ctx(srcctx->kdfctx);
if (dstctx->kdfctx == NULL) {
OPENSSL_free(dstctx);
return NULL;
}
if (!kdf_data_up_ref(dstctx->kdfdata)) {
EVP_KDF_CTX_free(dstctx->kdfctx);
OPENSSL_free(dstctx);
return NULL;
}
return dstctx;
}
static int kdf_set_ctx_params(void *vpkdfctx, const OSSL_PARAM params[])
{
PROV_KDF_CTX *pkdfctx = (PROV_KDF_CTX *)vpkdfctx;
return EVP_KDF_set_ctx_params(pkdfctx->kdfctx, params);
}
static const OSSL_PARAM *kdf_settable_ctx_params(void)
{
/*
* TODO(3.0): FIXME FIXME!! These settable_ctx_params functions should
* should have a provctx argument so we can get hold of the libctx.
*/
EVP_KDF *kdf = EVP_KDF_fetch(NULL, "TLS1-PRF", NULL);
const OSSL_PARAM *params;
if (kdf == NULL)
return NULL;
params = EVP_KDF_settable_ctx_params(kdf);
EVP_KDF_free(kdf);
return params;
}
const OSSL_DISPATCH kdf_keyexch_functions[] = {
{ OSSL_FUNC_KEYEXCH_NEWCTX, (void (*)(void))kdf_newctx },
{ OSSL_FUNC_KEYEXCH_INIT, (void (*)(void))kdf_init },
{ OSSL_FUNC_KEYEXCH_DERIVE, (void (*)(void))kdf_derive },
{ OSSL_FUNC_KEYEXCH_FREECTX, (void (*)(void))kdf_freectx },
{ OSSL_FUNC_KEYEXCH_DUPCTX, (void (*)(void))kdf_dupctx },
{ OSSL_FUNC_KEYEXCH_SET_CTX_PARAMS, (void (*)(void))kdf_set_ctx_params },
{ OSSL_FUNC_KEYEXCH_SETTABLE_CTX_PARAMS,
(void (*)(void))kdf_settable_ctx_params },
{ 0, NULL }
};
|
