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
|
/*
* Copyright (c) 2024 Vaughn Nugent
*
* Package: noscrypt
* File: impl/monocypher.c
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with noscrypt. If not, see http://www.gnu.org/licenses/.
*/
/*
* This file handles some fallbacks that may not be available on
* some platforms. More specifically:
* - Secure memset 0
* - Chacha20 cipher
*
*/
#ifdef NC_ENABLE_MONOCYPHER
#include <monocypher.h>
#include "nc-util.h"
/* Export secure memse0 */
#ifndef _IMPL_SECURE_ZERO_MEMSET
/* export cytpo wipe function as is */
#define _IMPL_SECURE_ZERO_MEMSET crypto_wipe
#endif
/* Export Chacha20 */
#ifndef _IMPL_CHACHA20_CRYPT
#define _IMPL_CHACHA20_CRYPT _mc_chacha20_crypt
_IMPLSTB cstatus_t _mc_chacha20_crypt(
const uint8_t* key,
const uint8_t* nonce,
const uint8_t* input,
uint8_t* output,
uint32_t dataLen
)
{
if(dataLen > SIZE_MAX)
{
return CSTATUS_FAIL;
}
/*
* Function returns the next counter value which is not
* needed for noscrypt as encryptions are one-shot, and
* require a new nonce for each encryption.
*
* ITEF function uses a 12byte nonce which is required for
* nip-44 compliant encryption.
*/
crypto_chacha20_ietf(
output,
input,
(size_t)dataLen,
key,
nonce,
0x00 /* Counter always starts at 0 */
);
return CSTATUS_OK;
}
#endif
#endif /* !NC_ENABLE_MONOCYPHER */
|
