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- /*
- * 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) 2013-2018 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 and 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 MyCryptoGeneric_h
- #define MyCryptoGeneric_h
-
- #include "hal/crypto/MyCryptoHAL.h"
-
- #define MY_CRYPTO_SHA256_ASM //!< Switch to define correct variable scope for ASM SHA256 implementation
-
- #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);
- }
- // MHAC SHA256
-
- #define IPAD 0x36 //!< HMAC, inner hash, xor byte
- #define OPAD 0x5C //!< HMAC, outer hash, xor byte
-
- #define HMAC_SHA256_BITS SHA256_HASH_BITS //!< Defines the size of a SHA-256 HMAC hash value in bits
- #define HMAC_SHA256_BYTES SHA256_HASH_BYTES //!< Defines the size of a SHA-256 HMAC hash value in bytes
- #define HMAC_SHA256_BLOCK_BITS SHA256_BLOCK_BITS //!< Defines the size of a SHA-256 HMAC input block in bits
- #define HMAC_SHA256_BLOCK_BYTES SHA256_BLOCK_BYTES //!< Defines the size of a SHA-256 HMAC input block in bytes
-
- /**
- * @brief hash context structure
- */
- typedef struct {
- sha256_ctx_t a; //!< a
- sha256_ctx_t b; //!< b
- } hmac_sha256_ctx_t;
-
- /**
- * @brief SHA256 HMAC function
- *
- * @param dest pointer to the location where the hash value is going to be written to
- * @param key pointer to the key that's is needed for the HMAC calculation
- * @param keylength_b length of the key
- * @param msg pointer to the message thats going to be hashed
- * @param msglength_b length of the message
- */
- void hmac_sha256(void *dest, const void *key, uint16_t keylength_b, const void *msg,
- uint32_t msglength_b);
-
- #endif
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