usbloadergx/source/libs/libwolfssl/wolfcrypt/chacha20_poly1305.h

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/* chacha20_poly1305.h
*
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* Copyright (C) 2006-2020 wolfSSL Inc.
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*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
/* This implementation of the ChaCha20-Poly1305 AEAD is based on "ChaCha20
* and Poly1305 for IETF protocols" (draft-irtf-cfrg-chacha20-poly1305-10):
* https://tools.ietf.org/html/draft-irtf-cfrg-chacha20-poly1305-10
*/
/*!
\file wolfssl/wolfcrypt/chacha20_poly1305.h
*/
#ifndef WOLF_CRYPT_CHACHA20_POLY1305_H
#define WOLF_CRYPT_CHACHA20_POLY1305_H
#include <libs/libwolfssl/wolfcrypt/types.h>
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#include <libs/libwolfssl/wolfcrypt/chacha.h>
#include <libs/libwolfssl/wolfcrypt/poly1305.h>
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#if defined(HAVE_CHACHA) && defined(HAVE_POLY1305)
#ifdef __cplusplus
extern "C" {
#endif
#define CHACHA20_POLY1305_AEAD_KEYSIZE 32
#define CHACHA20_POLY1305_AEAD_IV_SIZE 12
#define CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE 16
enum {
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CHACHA20_POLY_1305_ENC_TYPE = 8, /* cipher unique type */
/* AEAD Cipher Direction */
CHACHA20_POLY1305_AEAD_DECRYPT = 0,
CHACHA20_POLY1305_AEAD_ENCRYPT = 1,
/* AEAD State */
CHACHA20_POLY1305_STATE_INIT = 0,
CHACHA20_POLY1305_STATE_READY = 1,
CHACHA20_POLY1305_STATE_AAD = 2,
CHACHA20_POLY1305_STATE_DATA = 3,
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};
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typedef struct ChaChaPoly_Aead {
ChaCha chacha;
Poly1305 poly;
word32 aadLen;
word32 dataLen;
byte state;
byte isEncrypt:1;
} ChaChaPoly_Aead;
/*
* The IV for this implementation is 96 bits to give the most flexibility.
*
* Some protocols may have unique per-invocation inputs that are not
* 96-bit in length. For example, IPsec may specify a 64-bit nonce. In
* such a case, it is up to the protocol document to define how to
* transform the protocol nonce into a 96-bit nonce, for example by
* concatenating a constant value.
*/
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WOLFSSL_API
int wc_ChaCha20Poly1305_Encrypt(
const byte inKey[CHACHA20_POLY1305_AEAD_KEYSIZE],
const byte inIV[CHACHA20_POLY1305_AEAD_IV_SIZE],
const byte* inAAD, const word32 inAADLen,
const byte* inPlaintext, const word32 inPlaintextLen,
byte* outCiphertext,
byte outAuthTag[CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE]);
WOLFSSL_API
int wc_ChaCha20Poly1305_Decrypt(
const byte inKey[CHACHA20_POLY1305_AEAD_KEYSIZE],
const byte inIV[CHACHA20_POLY1305_AEAD_IV_SIZE],
const byte* inAAD, const word32 inAADLen,
const byte* inCiphertext, const word32 inCiphertextLen,
const byte inAuthTag[CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE],
byte* outPlaintext);
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WOLFSSL_API
int wc_ChaCha20Poly1305_CheckTag(
const byte authTag[CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE],
const byte authTagChk[CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE]);
/* Implementation of AEAD, which includes support for adding
data, then final calculation of authentication tag */
WOLFSSL_API int wc_ChaCha20Poly1305_Init(ChaChaPoly_Aead* aead,
const byte inKey[CHACHA20_POLY1305_AEAD_KEYSIZE],
const byte inIV[CHACHA20_POLY1305_AEAD_IV_SIZE],
int isEncrypt);
WOLFSSL_API int wc_ChaCha20Poly1305_UpdateAad(ChaChaPoly_Aead* aead,
const byte* inAAD, word32 inAADLen);
WOLFSSL_API int wc_ChaCha20Poly1305_UpdateData(ChaChaPoly_Aead* aead,
const byte* inData, byte* outData, word32 dataLen);
WOLFSSL_API int wc_ChaCha20Poly1305_Final(ChaChaPoly_Aead* aead,
byte outAuthTag[CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE]);
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#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* HAVE_CHACHA && HAVE_POLY1305 */
#endif /* WOLF_CRYPT_CHACHA20_POLY1305_H */