[457] | 1 | /* chacha.h
|
---|
| 2 | *
|
---|
| 3 | * Copyright (C) 2006-2020 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 | word32 left; /* number of bytes leftover */
|
---|
| 61 | #ifdef HAVE_INTEL_AVX1
|
---|
| 62 | /* vpshufd reads 16 bytes but we only use bottom 4. */
|
---|
| 63 | byte extra[12];
|
---|
| 64 | #endif
|
---|
| 65 | } ChaCha;
|
---|
| 66 |
|
---|
| 67 | /**
|
---|
| 68 | * IV(nonce) changes with each record
|
---|
| 69 | * counter is for what value the block counter should start ... usually 0
|
---|
| 70 | */
|
---|
| 71 | WOLFSSL_API int wc_Chacha_SetIV(ChaCha* ctx, const byte* inIv, word32 counter);
|
---|
| 72 |
|
---|
| 73 | WOLFSSL_API int wc_Chacha_Process(ChaCha* ctx, byte* cipher, const byte* plain,
|
---|
| 74 | word32 msglen);
|
---|
| 75 | WOLFSSL_API int wc_Chacha_SetKey(ChaCha* ctx, const byte* key, word32 keySz);
|
---|
| 76 |
|
---|
| 77 | #ifdef __cplusplus
|
---|
| 78 | } /* extern "C" */
|
---|
| 79 | #endif
|
---|
| 80 |
|
---|
| 81 | #endif /* HAVE_CHACHA */
|
---|
| 82 | #endif /* WOLF_CRYPT_CHACHA_H */
|
---|
| 83 |
|
---|