trng

TRNG Crypto Driver

This hardware abstracted driver can be used to interact with a external ring-oscillator circutit or any other random bit generator. The hardware layer is fully abstract an can be switched between different plattforms.

File Structure

drivers/
└── crypto/
    └── trng/
        ├── trng.c
        └── trng.h

Downloads

The library can be downloaded (zip or tar), cloned or used as submodule in a project.

Type	File	Description
Library	zip / tar	TRNG crypto library

Using with git clone

mkdir -p ./drivers/crypto/
git clone https://github.com/0x007E/drivers-crypto-trng.git ./drivers/crypto
mv ./drivers/crypto/drivers-crypto-trng ./drivers/crypto/trng

Using as git submodule

git submodule add https://github.com/0x007E/drivers-crypto-trng.git  drivers/crypto/trng

Programming

#include "../lib/drivers/crypto/trng/trng.h"
 
// Continously pin status readin (e.g. through timer)
ISR(...)
{
    // ... Insert pin status (HIGH/LOW)
    trng_next_bit(...);
}
 
int main(void)
{
    // Pin Setup for TRNG
 
    // Timer Setup for TRNG
 
    trng_init();
 
    while(1)
    {
        if(trng_buffer_status() == TRNG_Buffer_Full)
        {
            volatile unsigned char *trng_numbers = trng_buffer();
            
            for (unsigned char i=0; i < TRNG_BUFFER_SIZE; i++)
            {
                // Output -> *(trng_numbers++) 
            }
            trng_reset();
        }
    }
}

Additional Information

Type	Link	Description
Ring-Oscillator	pdf	Ring-Oscillator circuit with NAND and XOR

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R. GAECHTER