wolf SSL / wolfSSL

wolfSSL SSL/TLS library, support up to TLS1.3

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wolfssl/wolfcrypt/chacha.h@13:f67a6c6013ca, 2017-08-22 (annotated)

Committer:
wolfSSL
Date:
Tue Aug 22 10:48:22 2017 +0000
Revision:
13:f67a6c6013ca
Parent:
11:cee25a834751 
wolfSSL3.12.0 with TLS1.3

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 11:cee25a834751 1 /* chacha.h
wolfSSL 11:cee25a834751 2 *
wolfSSL 11:cee25a834751 3 * Copyright (C) 2006-2016 wolfSSL Inc.
wolfSSL 11:cee25a834751 4 *
wolfSSL 11:cee25a834751 5 * This file is part of wolfSSL.
wolfSSL 11:cee25a834751 6 *
wolfSSL 11:cee25a834751 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 11:cee25a834751 8 * it under the terms of the GNU General Public License as published by
wolfSSL 11:cee25a834751 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 11:cee25a834751 10 * (at your option) any later version.
wolfSSL 11:cee25a834751 11 *
wolfSSL 11:cee25a834751 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 11:cee25a834751 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 11:cee25a834751 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 11:cee25a834751 15 * GNU General Public License for more details.
wolfSSL 11:cee25a834751 16 *
wolfSSL 11:cee25a834751 17 * You should have received a copy of the GNU General Public License
wolfSSL 11:cee25a834751 18 * along with this program; if not, write to the Free Software
wolfSSL 11:cee25a834751 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
wolfSSL 11:cee25a834751 20 */
wolfSSL 11:cee25a834751 21
wolfSSL 11:cee25a834751 22
wolfSSL 11:cee25a834751 23 #ifndef WOLF_CRYPT_CHACHA_H
wolfSSL 11:cee25a834751 24 #define WOLF_CRYPT_CHACHA_H
wolfSSL 11:cee25a834751 25
wolfSSL 11:cee25a834751 26 #include <wolfssl/wolfcrypt/types.h>
wolfSSL 11:cee25a834751 27
wolfSSL 11:cee25a834751 28 #ifdef HAVE_CHACHA
wolfSSL 11:cee25a834751 29
wolfSSL 11:cee25a834751 30 #ifdef __cplusplus
wolfSSL 11:cee25a834751 31 extern "C" {
wolfSSL 11:cee25a834751 32 #endif
wolfSSL 11:cee25a834751 33
wolfSSL 11:cee25a834751 34 /* Size of the IV */
wolfSSL 11:cee25a834751 35 #define CHACHA_IV_WORDS 3
wolfSSL 11:cee25a834751 36 #define CHACHA_IV_BYTES (CHACHA_IV_WORDS * sizeof(word32))
wolfSSL 11:cee25a834751 37
wolfSSL 11:cee25a834751 38 /* Size of ChaCha chunks */
wolfSSL 11:cee25a834751 39 #define CHACHA_CHUNK_WORDS 16
wolfSSL 11:cee25a834751 40 #define CHACHA_CHUNK_BYTES (CHACHA_CHUNK_WORDS * sizeof(word32))
wolfSSL 11:cee25a834751 41
wolfSSL 11:cee25a834751 42 enum {
wolfSSL 11:cee25a834751 43 CHACHA_ENC_TYPE = 7 /* cipher unique type */
wolfSSL 11:cee25a834751 44 };
wolfSSL 11:cee25a834751 45
wolfSSL 11:cee25a834751 46 typedef struct ChaCha {
wolfSSL 11:cee25a834751 47 word32 X[CHACHA_CHUNK_WORDS]; /* state of cipher */
wolfSSL 11:cee25a834751 48 } ChaCha;
wolfSSL 11:cee25a834751 49
wolfSSL 11:cee25a834751 50 /**
wolfSSL 11:cee25a834751 51 * IV(nonce) changes with each record
wolfSSL 11:cee25a834751 52 * counter is for what value the block counter should start ... usually 0
wolfSSL 11:cee25a834751 53 */
wolfSSL 11:cee25a834751 54 WOLFSSL_API int wc_Chacha_SetIV(ChaCha* ctx, const byte* inIv, word32 counter);
wolfSSL 11:cee25a834751 55
wolfSSL 11:cee25a834751 56 WOLFSSL_API int wc_Chacha_Process(ChaCha* ctx, byte* cipher, const byte* plain,
wolfSSL 11:cee25a834751 57 word32 msglen);
wolfSSL 11:cee25a834751 58 WOLFSSL_API int wc_Chacha_SetKey(ChaCha* ctx, const byte* key, word32 keySz);
wolfSSL 11:cee25a834751 59
wolfSSL 11:cee25a834751 60 #ifdef __cplusplus
wolfSSL 11:cee25a834751 61 } /* extern "C" */
wolfSSL 11:cee25a834751 62 #endif
wolfSSL 11:cee25a834751 63
wolfSSL 11:cee25a834751 64 #endif /* HAVE_CHACHA */
wolfSSL 11:cee25a834751 65 #endif /* WOLF_CRYPT_CHACHA_H */
wolfSSL 11:cee25a834751 66
wolfSSL 11:cee25a834751 67