smartcard/hiding_8h_source.html

#ifndef HIDING_H

#define HIDING_H


#include "defs.h"

#include "rng.h"

#include "aesMath.h"

#include <string.h>


class Hiding

{

public:

    Hiding() = default;


    void init();


    #ifdef SHUFFLING

    void shuffleSBoxAccess(uint8_t indices[]);

    #endif


    #ifdef DUMMY_OPS

    void dummyOp();

    #endif


private:

    #ifdef DUMMY_OPS

    static constexpr uint8_t MAX_NUMBER_NO_OPS  = 100;

    static constexpr uint8_t NUMBER_OPS         = 40;

    uint8_t mNumbersDummyOps[NUMBER_OPS]        = {};

    uint8_t mNoOpCounter                        = 0;

    #endif


    #ifdef SHUFFLING

    static uint8_t DEFAULT_INV_SBOX_INDICES[STATE_BYTES];

    #endif


    RNG mRNG;


    void shuffleArray(uint8_t array[], const uint8_t size);

};


#endif // HIDING_H

Hiding
Class that implements 2 hiding techniques: dummy-ops & shuffling.
Definition hiding.h:32

Hiding::dummyOp
void dummyOp()
Perform a dummy NOP operation a random number of times.

Hiding::mRNG
RNG mRNG
Random number generator.
Definition hiding.h:78

Hiding::init
void init()
Initialize AES hiding operations.

Hiding::NUMBER_OPS
static constexpr uint8_t NUMBER_OPS
The number of operations before which the dummy ops are executed.
Definition hiding.h:69

Hiding::shuffleSBoxAccess
void shuffleSBoxAccess(uint8_t indices[])
Shuffle the S-Box access.

Hiding::mNoOpCounter
uint8_t mNoOpCounter
Counter for the number of dummy ops per round.
Definition hiding.h:71

Hiding::Hiding
Hiding()=default
Construct a new Hiding object.

Hiding::DEFAULT_INV_SBOX_INDICES
static uint8_t DEFAULT_INV_SBOX_INDICES[STATE_BYTES]
Array that contains values from 0 to 15.
Definition hiding.h:75

Hiding::mNumbersDummyOps
uint8_t mNumbersDummyOps[NUMBER_OPS]
Array of random numbers, which specify the number of dummy ops per round.
Definition hiding.h:70

Hiding::shuffleArray
void shuffleArray(uint8_t array[], const uint8_t size)
Shuffle an array using the Fisher-Yates shuffle.

Hiding::MAX_NUMBER_NO_OPS
static constexpr uint8_t MAX_NUMBER_NO_OPS
The maximum number of NOPs per AES execution. It is important that this number stays the same for eve...
Definition hiding.h:68

RNG
Class that provides a random number generator. The RNG can be seeded by reading noise from an unused ...
Definition rng.h:27