1 | /* chacha.h
|
---|
2 | *
|
---|
3 | * Copyright (C) 2006-2017 wolfSSL Inc.
|
---|
4 | *
|
---|
5 | * This file is part of wolfSSL.
|
---|
6 | *
|
---|
7 | * wolfSSL is free software; you can redistribute it and/or modify
|
---|
8 | * it under the terms of the GNU General Public License as published by
|
---|
9 | * the Free Software Foundation; either version 2 of the License, or
|
---|
10 | * (at your option) any later version.
|
---|
11 | *
|
---|
12 | * wolfSSL is distributed in the hope that it will be useful,
|
---|
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
15 | * GNU General Public License for more details.
|
---|
16 | *
|
---|
17 | * You should have received a copy of the GNU General Public License
|
---|
18 | * along with this program; if not, write to the Free Software
|
---|
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
|
---|
20 | */
|
---|
21 |
|
---|
22 | /*!
|
---|
23 | \file wolfssl/wolfcrypt/chacha.h
|
---|
24 | */
|
---|
25 |
|
---|
26 |
|
---|
27 | #ifndef WOLF_CRYPT_CHACHA_H
|
---|
28 | #define WOLF_CRYPT_CHACHA_H
|
---|
29 |
|
---|
30 | #include <wolfssl/wolfcrypt/types.h>
|
---|
31 |
|
---|
32 | #ifdef HAVE_CHACHA
|
---|
33 |
|
---|
34 | #ifdef __cplusplus
|
---|
35 | extern "C" {
|
---|
36 | #endif
|
---|
37 |
|
---|
38 | /* Size of the IV */
|
---|
39 | #define CHACHA_IV_WORDS 3
|
---|
40 | #define CHACHA_IV_BYTES (CHACHA_IV_WORDS * sizeof(word32))
|
---|
41 |
|
---|
42 | /* Size of ChaCha chunks */
|
---|
43 | #define CHACHA_CHUNK_WORDS 16
|
---|
44 | #define CHACHA_CHUNK_BYTES (CHACHA_CHUNK_WORDS * sizeof(word32))
|
---|
45 |
|
---|
46 | #ifdef WOLFSSL_X86_64_BUILD
|
---|
47 | #if defined(USE_INTEL_SPEEDUP) && !defined(NO_CHACHA_ASM)
|
---|
48 | #define USE_INTEL_CHACHA_SPEEDUP
|
---|
49 | #define HAVE_INTEL_AVX1
|
---|
50 | #endif
|
---|
51 | #endif
|
---|
52 |
|
---|
53 | enum {
|
---|
54 | CHACHA_ENC_TYPE = WC_CIPHER_CHACHA, /* cipher unique type */
|
---|
55 | CHACHA_MAX_KEY_SZ = 32,
|
---|
56 | };
|
---|
57 |
|
---|
58 | typedef struct ChaCha {
|
---|
59 | word32 X[CHACHA_CHUNK_WORDS]; /* state of cipher */
|
---|
60 | #ifdef HAVE_INTEL_AVX1
|
---|
61 | /* vpshufd reads 16 bytes but we only use bottom 4. */
|
---|
62 | byte extra[12];
|
---|
63 | #endif
|
---|
64 | } ChaCha;
|
---|
65 |
|
---|
66 | /**
|
---|
67 | * IV(nonce) changes with each record
|
---|
68 | * counter is for what value the block counter should start ... usually 0
|
---|
69 | */
|
---|
70 | WOLFSSL_API int wc_Chacha_SetIV(ChaCha* ctx, const byte* inIv, word32 counter);
|
---|
71 |
|
---|
72 | WOLFSSL_API int wc_Chacha_Process(ChaCha* ctx, byte* cipher, const byte* plain,
|
---|
73 | word32 msglen);
|
---|
74 | WOLFSSL_API int wc_Chacha_SetKey(ChaCha* ctx, const byte* key, word32 keySz);
|
---|
75 |
|
---|
76 | #ifdef __cplusplus
|
---|
77 | } /* extern "C" */
|
---|
78 | #endif
|
---|
79 |
|
---|
80 | #endif /* HAVE_CHACHA */
|
---|
81 | #endif /* WOLF_CRYPT_CHACHA_H */
|
---|
82 |
|
---|