mirror of
https://github.com/IoTManagerProject/IoTManager.git
synced 2026-03-30 11:59:12 +03:00
129 lines
4.6 KiB
C
129 lines
4.6 KiB
C
/*
|
|
* The MySensors Arduino library handles the wireless radio link and protocol
|
|
* between your home built sensors/actuators and HA controller of choice.
|
|
* The sensors forms a self healing radio network with optional repeaters. Each
|
|
* repeater and gateway builds a routing tables in EEPROM which keeps track of the
|
|
* network topology allowing messages to be routed to nodes.
|
|
*
|
|
* Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
|
|
* Copyright (C) 2013-2019 Sensnology AB
|
|
* Full contributor list: https://github.com/mysensors/MySensors/graphs/contributors
|
|
*
|
|
* Documentation: http://www.mysensors.org
|
|
* Support Forum: http://forum.mysensors.org
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* ======================================================================
|
|
*
|
|
* SHA256 implementation for AVR:
|
|
*
|
|
* This file is part of the AVR-Crypto-Lib.
|
|
* Copyright (C) 2006-2015 Daniel Otte (bg@nerilex.org)
|
|
*
|
|
* This program 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 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* Author: Daniel Otte
|
|
*
|
|
* License: GPLv3 or later
|
|
*
|
|
* ======================================================================
|
|
*/
|
|
|
|
#ifndef _SHA256_H_
|
|
#define _SHA256_H_
|
|
|
|
#define MY_CRYPTO_SHA256_ASM //!< Switch to define correct variable scope for ASM SHA256 implementation
|
|
|
|
#define IPAD 0x36 //!< HMAC, inner hash, xor byte
|
|
#define OPAD 0x5C //!< HMAC, outer hash, xor byte
|
|
|
|
#define SHA256_HASH_BITS 256 //!< Defines the size of a SHA-256 hash value in bits
|
|
#define SHA256_HASH_BYTES (SHA256_HASH_BITS/8) //!< Defines the size of a SHA-256 hash value in bytes
|
|
#define SHA256_BLOCK_BITS 512 //!< Defines the size of a SHA-256 input block in bits
|
|
#define SHA256_BLOCK_BYTES (SHA256_BLOCK_BITS/8) //!< Defines the size of a SHA-256 input block in bytes
|
|
|
|
/**
|
|
* @brief SHA-256 context type
|
|
*
|
|
* A variable of this type may hold the state of a SHA-256 hashing process
|
|
*/
|
|
typedef struct {
|
|
uint32_t h[8]; //!< h
|
|
uint64_t length; //!< length
|
|
} sha256_ctx_t;
|
|
|
|
/**
|
|
* @brief SHA-256 hash value type
|
|
*
|
|
* A variable of this type may hold the hash value produced by the
|
|
* sha256_ctx2hash(sha256_hash_t *dest, const sha256_ctx_t *state) function.
|
|
*/
|
|
typedef uint8_t sha256_hash_t[SHA256_HASH_BYTES];
|
|
|
|
extern "C" { // ASM implementation, see MyASM.S
|
|
/**
|
|
* @brief initialise a SHA-256 context
|
|
*
|
|
* This function sets a ::sha256_ctx_t to the initial values for hashing.
|
|
* @param state pointer to the SHA-256 hashing context
|
|
*/
|
|
void sha256_init(sha256_ctx_t *state);
|
|
|
|
/**
|
|
* @brief update the context with a given block
|
|
*
|
|
* This function updates the SHA-256 hash context by processing the given block
|
|
* of fixed length.
|
|
* @param state pointer to the SHA-256 hash context
|
|
* @param block pointer to the block of fixed length (512 bit = 64 byte)
|
|
*/
|
|
void sha256_nextBlock(sha256_ctx_t *state, const void *block);
|
|
|
|
/**
|
|
* @brief finalize the context with the given block
|
|
*
|
|
* This function finalizes the SHA-256 hash context by processing the given block
|
|
* of variable length.
|
|
* @param state pointer to the SHA-256 hash context
|
|
* @param block pointer to the block of fixed length (512 bit = 64 byte)
|
|
* @param length_b the length of the block in bits
|
|
*/
|
|
void sha256_lastBlock(sha256_ctx_t *state, const void *block, uint16_t length_b);
|
|
|
|
/**
|
|
* @brief convert the hash state into the hash value
|
|
*
|
|
* This function reads the context and writes the hash value to the destination
|
|
* @param dest pointer to the location where the hash value should be written
|
|
* @param state pointer to the SHA-256 hash context
|
|
*/
|
|
void sha256_ctx2hash(sha256_hash_t *dest, const sha256_ctx_t *state);
|
|
|
|
/**
|
|
* @brief simple SHA-256 hashing function for direct hashing
|
|
*
|
|
* This function automaticaly hashes a given message of arbitary length with
|
|
* the SHA-256 hashing algorithm.
|
|
* @param dest pointer to the location where the hash value is going to be written to
|
|
* @param msg pointer to the message thats going to be hashed
|
|
* @param length_b length of the message in bits
|
|
*/
|
|
void sha256(sha256_hash_t *dest, const void *msg, uint32_t length_b);
|
|
}
|
|
|
|
#endif
|