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
|
/**
* (C) 2007-22 - ntop.org and contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not see see <http://www.gnu.org/licenses/>
*
*/
#ifndef CC20_H
#define CC20_H
#include <stdint.h>
#include "n2n.h" // HAVE_OPENSSL_1_1, traceEvent ...
#define CC20_IV_SIZE 16
#define CC20_KEY_BYTES (256/8)
#ifdef HAVE_OPENSSL_1_1 // openSSL 1.1 ----------------------------------------------------------------------------
#include <openssl/evp.h>
#include <openssl/err.h>
typedef struct cc20_context_t {
EVP_CIPHER_CTX *ctx; /* openssl's reusable evp_* en/de-cryption context */
const EVP_CIPHER *cipher; /* cipher to use: e.g. EVP_chacha20() */
uint8_t key[CC20_KEY_BYTES]; /* the pure key data for payload encryption & decryption */
} cc20_context_t;
#elif defined (__SSE2__) // SSE2 ---------------------------------------------------------------------------------
#include <immintrin.h>
typedef struct cc20_context {
uint32_t keystream32[16];
uint8_t key[CC20_KEY_BYTES];
} cc20_context_t;
#else // plain C --------------------------------------------------------------------------------------------------
typedef struct cc20_context {
uint32_t keystream32[16];
uint32_t state[16];
uint8_t key[CC20_KEY_BYTES];
} cc20_context_t;
#endif // openSSL 1.1, plain C ------------------------------------------------------------------------------------
int cc20_crypt (unsigned char *out, const unsigned char *in, size_t in_len,
const unsigned char *iv, cc20_context_t *ctx);
int cc20_init (const unsigned char *key, cc20_context_t **ctx);
int cc20_deinit (cc20_context_t *ctx);
#endif // CC20_H
|
