Xuyi Wang / wolfSSL

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wolfssl/wolfcrypt/chacha.h@15:117db924cf7c, 2018-08-18 (annotated)

Committer:
wolfSSL
Date:
Sat Aug 18 22:20:43 2018 +0000
Revision:
15:117db924cf7c
wolfSSL 3.15.3

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 15:117db924cf7c 1 /* chacha.h
wolfSSL 15:117db924cf7c 2 *
wolfSSL 15:117db924cf7c 3 * Copyright (C) 2006-2017 wolfSSL Inc.
wolfSSL 15:117db924cf7c 4 *
wolfSSL 15:117db924cf7c 5 * This file is part of wolfSSL.
wolfSSL 15:117db924cf7c 6 *
wolfSSL 15:117db924cf7c 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 15:117db924cf7c 8 * it under the terms of the GNU General Public License as published by
wolfSSL 15:117db924cf7c 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 15:117db924cf7c 10 * (at your option) any later version.
wolfSSL 15:117db924cf7c 11 *
wolfSSL 15:117db924cf7c 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 15:117db924cf7c 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 15:117db924cf7c 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 15:117db924cf7c 15 * GNU General Public License for more details.
wolfSSL 15:117db924cf7c 16 *
wolfSSL 15:117db924cf7c 17 * You should have received a copy of the GNU General Public License
wolfSSL 15:117db924cf7c 18 * along with this program; if not, write to the Free Software
wolfSSL 15:117db924cf7c 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
wolfSSL 15:117db924cf7c 20 */
wolfSSL 15:117db924cf7c 21
wolfSSL 15:117db924cf7c 22 /*!
wolfSSL 15:117db924cf7c 23 \file wolfssl/wolfcrypt/chacha.h
wolfSSL 15:117db924cf7c 24 */
wolfSSL 15:117db924cf7c 25
wolfSSL 15:117db924cf7c 26
wolfSSL 15:117db924cf7c 27 #ifndef WOLF_CRYPT_CHACHA_H
wolfSSL 15:117db924cf7c 28 #define WOLF_CRYPT_CHACHA_H
wolfSSL 15:117db924cf7c 29
wolfSSL 15:117db924cf7c 30 #include <wolfssl/wolfcrypt/types.h>
wolfSSL 15:117db924cf7c 31
wolfSSL 15:117db924cf7c 32 #ifdef HAVE_CHACHA
wolfSSL 15:117db924cf7c 33
wolfSSL 15:117db924cf7c 34 #ifdef __cplusplus
wolfSSL 15:117db924cf7c 35 extern "C" {
wolfSSL 15:117db924cf7c 36 #endif
wolfSSL 15:117db924cf7c 37
wolfSSL 15:117db924cf7c 38 /* Size of the IV */
wolfSSL 15:117db924cf7c 39 #define CHACHA_IV_WORDS 3
wolfSSL 15:117db924cf7c 40 #define CHACHA_IV_BYTES (CHACHA_IV_WORDS * sizeof(word32))
wolfSSL 15:117db924cf7c 41
wolfSSL 15:117db924cf7c 42 /* Size of ChaCha chunks */
wolfSSL 15:117db924cf7c 43 #define CHACHA_CHUNK_WORDS 16
wolfSSL 15:117db924cf7c 44 #define CHACHA_CHUNK_BYTES (CHACHA_CHUNK_WORDS * sizeof(word32))
wolfSSL 15:117db924cf7c 45
wolfSSL 15:117db924cf7c 46 #ifdef WOLFSSL_X86_64_BUILD
wolfSSL 15:117db924cf7c 47 #if defined(USE_INTEL_SPEEDUP) && !defined(NO_CHACHA_ASM)
wolfSSL 15:117db924cf7c 48 #define USE_INTEL_CHACHA_SPEEDUP
wolfSSL 15:117db924cf7c 49 #define HAVE_INTEL_AVX1
wolfSSL 15:117db924cf7c 50 #endif
wolfSSL 15:117db924cf7c 51 #endif
wolfSSL 15:117db924cf7c 52
wolfSSL 15:117db924cf7c 53 enum {
wolfSSL 15:117db924cf7c 54 CHACHA_ENC_TYPE = WC_CIPHER_CHACHA, /* cipher unique type */
wolfSSL 15:117db924cf7c 55 CHACHA_MAX_KEY_SZ = 32,
wolfSSL 15:117db924cf7c 56 };
wolfSSL 15:117db924cf7c 57
wolfSSL 15:117db924cf7c 58 typedef struct ChaCha {
wolfSSL 15:117db924cf7c 59 word32 X[CHACHA_CHUNK_WORDS]; /* state of cipher */
wolfSSL 15:117db924cf7c 60 #ifdef HAVE_INTEL_AVX1
wolfSSL 15:117db924cf7c 61 /* vpshufd reads 16 bytes but we only use bottom 4. */
wolfSSL 15:117db924cf7c 62 byte extra[12];
wolfSSL 15:117db924cf7c 63 #endif
wolfSSL 15:117db924cf7c 64 } ChaCha;
wolfSSL 15:117db924cf7c 65
wolfSSL 15:117db924cf7c 66 /**
wolfSSL 15:117db924cf7c 67 * IV(nonce) changes with each record
wolfSSL 15:117db924cf7c 68 * counter is for what value the block counter should start ... usually 0
wolfSSL 15:117db924cf7c 69 */
wolfSSL 15:117db924cf7c 70 WOLFSSL_API int wc_Chacha_SetIV(ChaCha* ctx, const byte* inIv, word32 counter);
wolfSSL 15:117db924cf7c 71
wolfSSL 15:117db924cf7c 72 WOLFSSL_API int wc_Chacha_Process(ChaCha* ctx, byte* cipher, const byte* plain,
wolfSSL 15:117db924cf7c 73 word32 msglen);
wolfSSL 15:117db924cf7c 74 WOLFSSL_API int wc_Chacha_SetKey(ChaCha* ctx, const byte* key, word32 keySz);
wolfSSL 15:117db924cf7c 75
wolfSSL 15:117db924cf7c 76 #ifdef __cplusplus
wolfSSL 15:117db924cf7c 77 } /* extern "C" */
wolfSSL 15:117db924cf7c 78 #endif
wolfSSL 15:117db924cf7c 79
wolfSSL 15:117db924cf7c 80 #endif /* HAVE_CHACHA */
wolfSSL 15:117db924cf7c 81 #endif /* WOLF_CRYPT_CHACHA_H */
wolfSSL 15:117db924cf7c 82
wolfSSL 15:117db924cf7c 83