Xuyi Wang / wolfSSL

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wolfssl/wolfcrypt/chacha20_poly1305.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 /* chacha20_poly1305.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 /* This implementation of the ChaCha20-Poly1305 AEAD is based on "ChaCha20
wolfSSL 15:117db924cf7c 24 * and Poly1305 for IETF protocols" (draft-irtf-cfrg-chacha20-poly1305-10):
wolfSSL 15:117db924cf7c 25 * https://tools.ietf.org/html/draft-irtf-cfrg-chacha20-poly1305-10
wolfSSL 15:117db924cf7c 26 */
wolfSSL 15:117db924cf7c 27
wolfSSL 15:117db924cf7c 28 /*!
wolfSSL 15:117db924cf7c 29 \file wolfssl/wolfcrypt/chacha20_poly1305.h
wolfSSL 15:117db924cf7c 30 */
wolfSSL 15:117db924cf7c 31
wolfSSL 15:117db924cf7c 32 #ifndef WOLF_CRYPT_CHACHA20_POLY1305_H
wolfSSL 15:117db924cf7c 33 #define WOLF_CRYPT_CHACHA20_POLY1305_H
wolfSSL 15:117db924cf7c 34
wolfSSL 15:117db924cf7c 35 #include <wolfssl/wolfcrypt/types.h>
wolfSSL 15:117db924cf7c 36
wolfSSL 15:117db924cf7c 37 #if defined(HAVE_CHACHA) && defined(HAVE_POLY1305)
wolfSSL 15:117db924cf7c 38
wolfSSL 15:117db924cf7c 39 #ifdef __cplusplus
wolfSSL 15:117db924cf7c 40 extern "C" {
wolfSSL 15:117db924cf7c 41 #endif
wolfSSL 15:117db924cf7c 42
wolfSSL 15:117db924cf7c 43 #define CHACHA20_POLY1305_AEAD_KEYSIZE 32
wolfSSL 15:117db924cf7c 44 #define CHACHA20_POLY1305_AEAD_IV_SIZE 12
wolfSSL 15:117db924cf7c 45 #define CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE 16
wolfSSL 15:117db924cf7c 46
wolfSSL 15:117db924cf7c 47 enum {
wolfSSL 15:117db924cf7c 48 CHACHA20_POLY_1305_ENC_TYPE = 8 /* cipher unique type */
wolfSSL 15:117db924cf7c 49 };
wolfSSL 15:117db924cf7c 50
wolfSSL 15:117db924cf7c 51 /*
wolfSSL 15:117db924cf7c 52 * The IV for this implementation is 96 bits to give the most flexibility.
wolfSSL 15:117db924cf7c 53 *
wolfSSL 15:117db924cf7c 54 * Some protocols may have unique per-invocation inputs that are not
wolfSSL 15:117db924cf7c 55 * 96-bit in length. For example, IPsec may specify a 64-bit nonce. In
wolfSSL 15:117db924cf7c 56 * such a case, it is up to the protocol document to define how to
wolfSSL 15:117db924cf7c 57 * transform the protocol nonce into a 96-bit nonce, for example by
wolfSSL 15:117db924cf7c 58 * concatenating a constant value.
wolfSSL 15:117db924cf7c 59 */
wolfSSL 15:117db924cf7c 60
wolfSSL 15:117db924cf7c 61 WOLFSSL_API
wolfSSL 15:117db924cf7c 62 int wc_ChaCha20Poly1305_Encrypt(
wolfSSL 15:117db924cf7c 63 const byte inKey[CHACHA20_POLY1305_AEAD_KEYSIZE],
wolfSSL 15:117db924cf7c 64 const byte inIV[CHACHA20_POLY1305_AEAD_IV_SIZE],
wolfSSL 15:117db924cf7c 65 const byte* inAAD, const word32 inAADLen,
wolfSSL 15:117db924cf7c 66 const byte* inPlaintext, const word32 inPlaintextLen,
wolfSSL 15:117db924cf7c 67 byte* outCiphertext,
wolfSSL 15:117db924cf7c 68 byte outAuthTag[CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE]);
wolfSSL 15:117db924cf7c 69
wolfSSL 15:117db924cf7c 70 WOLFSSL_API
wolfSSL 15:117db924cf7c 71 int wc_ChaCha20Poly1305_Decrypt(
wolfSSL 15:117db924cf7c 72 const byte inKey[CHACHA20_POLY1305_AEAD_KEYSIZE],
wolfSSL 15:117db924cf7c 73 const byte inIV[CHACHA20_POLY1305_AEAD_IV_SIZE],
wolfSSL 15:117db924cf7c 74 const byte* inAAD, const word32 inAADLen,
wolfSSL 15:117db924cf7c 75 const byte* inCiphertext, const word32 inCiphertextLen,
wolfSSL 15:117db924cf7c 76 const byte inAuthTag[CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE],
wolfSSL 15:117db924cf7c 77 byte* outPlaintext);
wolfSSL 15:117db924cf7c 78
wolfSSL 15:117db924cf7c 79 #ifdef __cplusplus
wolfSSL 15:117db924cf7c 80 } /* extern "C" */
wolfSSL 15:117db924cf7c 81 #endif
wolfSSL 15:117db924cf7c 82
wolfSSL 15:117db924cf7c 83 #endif /* HAVE_CHACHA && HAVE_POLY1305 */
wolfSSL 15:117db924cf7c 84 #endif /* WOLF_CRYPT_CHACHA20_POLY1305_H */
wolfSSL 15:117db924cf7c 85