23321c4588
* Reduce key duplication by enabling hardware RNG * Apply suggestion from @Copilot Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> * Apply suggestion from @Copilot Use micros() for worst case random seed for nrf52 Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> * Minor cleanup, remove dead code and clarify comment * trunk * Add useRadioEntropy bool, default false. --------- Co-authored-by: Ben Meadors <benmmeadors@gmail.com> Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> Co-authored-by: Jonathan Bennett <jbennett@incomsystems.biz>
29 lines
844 B
C++
29 lines
844 B
C++
#pragma once
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#include <cstddef>
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#include <cstdint>
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namespace HardwareRNG
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{
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/**
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* Fill the provided buffer with random bytes sourced from the most
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* appropriate hardware-backed RNG available on the current platform.
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*
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* @param buffer Destination buffer for random bytes
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* @param length Number of bytes to write
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* @param useRadioEntropy If true, attempt to mix radio entropy into the output as well.
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* @return true if the buffer was fully populated with entropy, false on failure
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*/
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bool fill(uint8_t *buffer, size_t length, bool useRadioEntropy = false);
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/**
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* Populate a 32-bit seed value with hardware-backed randomness where possible.
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*
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* @param seedOut Destination for the generated seed value
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* @return true if a seed was produced from a reliable entropy source
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*/
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bool seed(uint32_t &seedOut);
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} // namespace HardwareRNG
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