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6c12dddf5a
This commit changes the way random numbers are available with MySensors. The AVR platform uses a 32 Bit random seed build from a floating analog pin. The way of the generation of this seed is FIPS 140-2 compliant. For support MCU with a fast way to generate random data, the hwGetentropy() command is now available to allow rapid generation of random data. The ESP8266 platform uses the internal random source for randomness for hwGetentropy() and Arduino's random() function. The NRF5 platform initializes the pseudo random number generator from internal hardware number generator. The internal AES-ECB unit generates random data after filling with HWRNG data by AES-CBC. On Linux getrandom() is implemented via syscall(). signerAtsha204SoftGetNonce speed: AVR = ~14000us (sha204Soft) NRF51 = ~152us (AES-CBC), 1739us (old sha204Soft) NRF52 = ~31us (AES-CBC), 183us (old sha204Soft) ESP8266 = ~20us (RANDOM_REG32), 380us (old sha204Soft) All Nonce results tested for FIPS 140-2 compliance successfully.
140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
/**
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* The MySensors Arduino library handles the wireless radio link and protocol
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* between your home built sensors/actuators and HA controller of choice.
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* The sensors forms a self healing radio network with optional repeaters. Each
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* repeater and gateway builds a routing tables in EEPROM which keeps track of
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* the
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* network topology allowing messages to be routed to nodes.
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*
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* Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
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* Copyright (C) 2013-2015 Sensnology AB
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* Copyright (C) 2017 Frank Holtz
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* Full contributor list:
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* https://github.com/mysensors/Arduino/graphs/contributors
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*
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* Documentation: http://www.mysensors.org
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* Support Forum: http://forum.mysensors.org
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*/
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#ifndef MyHwNRF5_h
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#define MyHwNRF5_h
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#include "MyHw.h"
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#ifdef __cplusplus
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#include <Arduino.h>
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#endif
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// Define NRF5_SOFTDEVICE when SoftDevice found
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#if defined(S110) || defined(S130) || defined(S132)
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#ifndef NRF5_SOFTDEVICE
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#define NRF5_SOFTDEVICE
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#endif
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#endif
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#include "drivers/NRF5/nrf5_wiring_digital.c"
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#include "drivers/NRF5/wdt.h"
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#include "drivers/NVM/NVRAM.h"
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#include "drivers/NVM/VirtualPage.h"
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#include <avr/dtostrf.h>
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#include <nrf.h>
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#define snprintf_P(s, f, ...) snprintf((s), (f), __VA_ARGS__)
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#define printf_P printf
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// Define these as macros to save valuable space
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#define hwDigitalWrite(__pin, __value) digitalWrite(__pin, __value)
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#define hwDigitalRead(__pin) digitalRead(__pin)
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#define hwPinMode(__pin, __value) nrf5_pinMode(__pin, __value)
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#define hwMillis() millis()
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bool hwInit();
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void hwWatchdogReset();
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void hwReboot();
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void hwReadConfigBlock(void *buf, void *adr, size_t length);
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void hwWriteConfigBlock(void *buf, void *adr, size_t length);
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void hwWriteConfig(int adr, uint8_t value);
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uint8_t hwReadConfig(int adr);
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void hwRandomNumberInit();
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ssize_t hwGetentropy(void *__buffer, size_t __length);
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#define MY_HW_HAS_GETRANDOM
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#ifndef MY_SERIALDEVICE
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#define MY_SERIALDEVICE Serial
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#endif
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/**
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* Disable all interrupts.
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* Helper function for MY_CRITICAL_SECTION.
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*/
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static __inline__ uint8_t __disableIntsRetVal(void)
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{
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__disable_irq();
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return 1;
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}
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/**
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* Restore priority mask register.
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* Helper function for MY_CRITICAL_SECTION.
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*/
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static __inline__ void __priMaskRestore(const uint32_t *priMask)
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{
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__set_PRIMASK(*priMask);
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}
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/**
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* Reset events and read back on nRF52
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* http://infocenter.nordicsemi.com/pdf/nRF52_Series_Migration_v1.0.pdf
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*/
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#if __CORTEX_M == 0x04
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#define NRF_RESET_EVENT(event) \
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event = 0; \
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(void)event
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#else
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#define NRF_RESET_EVENT(event) event = 0
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#endif
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/**
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* RTC to use for hwSleep
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* RTC1 is used by arduino-nRF5
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* RTC2 is used on nRF52
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* RTC0 is used on nRF51. This conflicts with SoftDevice!
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*/
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#ifdef NRF_RTC2
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#define MY_HW_RTC NRF_RTC2
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#define MY_HW_RTC_IRQ_HANDLER RTC2_IRQHandler
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#define MY_HW_RTC_IRQN RTC2_IRQn
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#else
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#define MY_HW_RTC NRF_RTC0
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#define MY_HW_RTC_IRQ_HANDLER RTC0_IRQHandler
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#define MY_HW_RTC_IRQN RTC0_IRQn
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#endif
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/** Datastructure for AES ECB unit
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*/
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typedef struct {
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/** AES Key
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*/
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uint8_t key[16];
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/** Unencrypted data
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*/
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uint8_t cleartext[16];
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/** Encrypted data
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*/
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uint8_t ciphertext[16];
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} nrf_ecb_t;
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#ifndef DOXYGEN
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#define MY_CRITICAL_SECTION
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// temp. commented, to fix "CircularBuffer.h:94:2: warning: control reaches end of non-void function" error
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#define __MY_CRITICAL_SECTION \
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for (uint32_t __savePriMask \
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__attribute__((__cleanup__(__priMaskRestore))) = __get_PRIMASK(), \
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__ToDo = __disableIntsRetVal(); \
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__ToDo; __ToDo = 0)
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#endif /* DOXYGEN */
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#endif // #ifdef ARDUINO_ARCH_NRF5
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