wolf SSL / wolfSSL

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

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wolfssl/wolfcrypt/chacha.h@7:481bce714567, 2017-05-02 (annotated)

Committer:
wolfSSL
Date:
Tue May 02 08:44:47 2017 +0000
Revision:
7:481bce714567
wolfSSL3.10.2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 7:481bce714567 1 /* chacha.h
wolfSSL 7:481bce714567 2 *
wolfSSL 7:481bce714567 3 * Copyright (C) 2006-2016 wolfSSL Inc.
wolfSSL 7:481bce714567 4 *
wolfSSL 7:481bce714567 5 * This file is part of wolfSSL.
wolfSSL 7:481bce714567 6 *
wolfSSL 7:481bce714567 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 7:481bce714567 8 * it under the terms of the GNU General Public License as published by
wolfSSL 7:481bce714567 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 7:481bce714567 10 * (at your option) any later version.
wolfSSL 7:481bce714567 11 *
wolfSSL 7:481bce714567 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 7:481bce714567 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 7:481bce714567 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 7:481bce714567 15 * GNU General Public License for more details.
wolfSSL 7:481bce714567 16 *
wolfSSL 7:481bce714567 17 * You should have received a copy of the GNU General Public License
wolfSSL 7:481bce714567 18 * along with this program; if not, write to the Free Software
wolfSSL 7:481bce714567 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
wolfSSL 7:481bce714567 20 */
wolfSSL 7:481bce714567 21
wolfSSL 7:481bce714567 22
wolfSSL 7:481bce714567 23 #ifndef WOLF_CRYPT_CHACHA_H
wolfSSL 7:481bce714567 24 #define WOLF_CRYPT_CHACHA_H
wolfSSL 7:481bce714567 25
wolfSSL 7:481bce714567 26 #include <wolfssl/wolfcrypt/types.h>
wolfSSL 7:481bce714567 27
wolfSSL 7:481bce714567 28 #ifdef HAVE_CHACHA
wolfSSL 7:481bce714567 29
wolfSSL 7:481bce714567 30 #ifdef __cplusplus
wolfSSL 7:481bce714567 31 extern "C" {
wolfSSL 7:481bce714567 32 #endif
wolfSSL 7:481bce714567 33
wolfSSL 7:481bce714567 34 /* Size of the IV */
wolfSSL 7:481bce714567 35 #define CHACHA_IV_WORDS 3
wolfSSL 7:481bce714567 36 #define CHACHA_IV_BYTES (CHACHA_IV_WORDS * sizeof(word32))
wolfSSL 7:481bce714567 37
wolfSSL 7:481bce714567 38 /* Size of ChaCha chunks */
wolfSSL 7:481bce714567 39 #define CHACHA_CHUNK_WORDS 16
wolfSSL 7:481bce714567 40 #define CHACHA_CHUNK_BYTES (CHACHA_CHUNK_WORDS * sizeof(word32))
wolfSSL 7:481bce714567 41
wolfSSL 7:481bce714567 42 enum {
wolfSSL 7:481bce714567 43 CHACHA_ENC_TYPE = 7 /* cipher unique type */
wolfSSL 7:481bce714567 44 };
wolfSSL 7:481bce714567 45
wolfSSL 7:481bce714567 46 typedef struct ChaCha {
wolfSSL 7:481bce714567 47 word32 X[CHACHA_CHUNK_WORDS]; /* state of cipher */
wolfSSL 7:481bce714567 48 } ChaCha;
wolfSSL 7:481bce714567 49
wolfSSL 7:481bce714567 50 /**
wolfSSL 7:481bce714567 51 * IV(nonce) changes with each record
wolfSSL 7:481bce714567 52 * counter is for what value the block counter should start ... usually 0
wolfSSL 7:481bce714567 53 */
wolfSSL 7:481bce714567 54 WOLFSSL_API int wc_Chacha_SetIV(ChaCha* ctx, const byte* inIv, word32 counter);
wolfSSL 7:481bce714567 55
wolfSSL 7:481bce714567 56 WOLFSSL_API int wc_Chacha_Process(ChaCha* ctx, byte* cipher, const byte* plain,
wolfSSL 7:481bce714567 57 word32 msglen);
wolfSSL 7:481bce714567 58 WOLFSSL_API int wc_Chacha_SetKey(ChaCha* ctx, const byte* key, word32 keySz);
wolfSSL 7:481bce714567 59
wolfSSL 7:481bce714567 60 #ifdef __cplusplus
wolfSSL 7:481bce714567 61 } /* extern "C" */
wolfSSL 7:481bce714567 62 #endif
wolfSSL 7:481bce714567 63
wolfSSL 7:481bce714567 64 #endif /* HAVE_CHACHA */
wolfSSL 7:481bce714567 65 #endif /* WOLF_CRYPT_CHACHA_H */
wolfSSL 7:481bce714567 66
wolfSSL 7:481bce714567 67