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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*
* SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "internal_crypt_lib.h"
#ifdef USE_LKCA
#ifndef NV_CRYPTO_TFM_CTX_ALIGNED_PRESENT
#include <crypto/internal/hash.h>
#endif
#endif
void *lkca_hash_new(const char* alg_name)
{
#ifndef USE_LKCA
return NULL;
#else
//XXX: can we reuse crypto_shash part and just allocate desc
struct crypto_shash *alg;
struct shash_desc *desc;
alg = crypto_alloc_shash(alg_name, 0, 0);
if (IS_ERR(alg)) {
printk (KERN_INFO "Failed to alloc %s\n", alg_name);
return NULL;
}
desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(alg), GFP_KERNEL);
if (desc == NULL){
printk (KERN_INFO "Kernel out of mem\n");
crypto_free_shash(alg);
return NULL;
}
desc->tfm = alg;
return desc;
#endif
}
void lkca_hash_free(struct shash_desc *ctx)
{
#ifndef USE_LKCA
#else
crypto_free_shash(ctx->tfm);
kfree(ctx);
#endif
}
bool lkca_hash_duplicate(struct shash_desc *dst, struct shash_desc const *src)
{
#ifndef USE_LKCA
return false;
#else
SHASH_DESC_ON_STACK(tmp, src);
if (crypto_shash_export((struct shash_desc *) src, tmp)) {
return false;
}
if (crypto_shash_import(dst, tmp)) {
return false;
}
return true;
#endif
}
bool lkca_hmac_duplicate(struct shash_desc *dst, struct shash_desc const *src)
{
#ifndef USE_LKCA
return false;
#else
// in LKCA hmac export doesn't export ipad/opad, so we need to WAR it
struct crypto_shash *src_tfm = src->tfm;
struct crypto_shash *dst_tfm = dst->tfm;
int ss = crypto_shash_statesize(dst_tfm);
#ifdef NV_CRYPTO_TFM_CTX_ALIGNED_PRESENT
char *src_ipad = crypto_tfm_ctx_aligned(&src_tfm->base);
char *dst_ipad = crypto_tfm_ctx_aligned(&dst_tfm->base);
#else
int ctx_size = crypto_shash_alg(dst_tfm)->base.cra_ctxsize;
char *src_ipad = crypto_shash_ctx(src_tfm);
char *dst_ipad = crypto_shash_ctx(dst_tfm);
/*
* Actual struct definition is hidden, so I assume data we need is at
* the end. In 6.0 the struct has a pointer to crpyto_shash followed by:
* 'u8 ipad[statesize];', then 'u8 opad[statesize];'
*/
src_ipad += ctx_size - 2 * ss;
dst_ipad += ctx_size - 2 * ss;
#endif
memcpy(dst_ipad, src_ipad, crypto_shash_blocksize(src->tfm));
memcpy(dst_ipad + ss, src_ipad + ss, crypto_shash_blocksize(src->tfm));
crypto_shash_clear_flags(dst->tfm, CRYPTO_TFM_NEED_KEY);
return lkca_hash_duplicate(dst, src);
#endif
}
bool lkca_hash_all(const char* alg_name, const void *data,
size_t data_size, uint8_t *hash_value)
{
#ifndef USE_LKCA
return false;
#else
int ret;
struct crypto_shash *alg;
alg = crypto_alloc_shash(alg_name, 0, 0);
if (IS_ERR(alg)) {
return false;
}
ret = crypto_shash_tfm_digest(alg, data, data_size, hash_value);
crypto_free_shash(alg);
return (ret == 0);
#endif
}
bool lkca_hmac_set_key(struct shash_desc *desc, const uint8_t *key, size_t key_size)
{
#ifndef USE_LKCA
return false;
#else
int ret;
ret = crypto_shash_setkey(desc->tfm, key, key_size);
if (ret == 0) {
ret = crypto_shash_init(desc);
}
return ret == 0;
#endif
}
bool lkca_hmac_all(const char* alg_name, const uint8_t *key, size_t key_size,
const uint8_t *data, size_t data_size, uint8_t *hash_value)
{
#ifndef USE_LKCA
return false;
#else
int ret;
struct crypto_shash *alg;
alg = crypto_alloc_shash(alg_name, 0, 0);
if (IS_ERR(alg)) {
return false;
}
ret = crypto_shash_setkey(alg, key, key_size);
if (ret == 0){
ret = crypto_shash_tfm_digest(alg, data, data_size, hash_value);
}
crypto_free_shash(alg);
return (ret == 0);
#endif
}
|
