smartcard/aesMath_8h_source.html

#ifndef AES_MATH_H

#define AES_MATH_H


#include "defs.h"


class AESMath

{

public:

    static void reverseArray(uint8_t arr[], uint8_t low, uint8_t high);


    static void swap(uint8_t &a, uint8_t &b);


    static void rightRotateArray(uint8_t arr[], uint8_t n, uint8_t k);


    static uint8_t ffMul(uint8_t x, uint8_t y);

private:

    static constexpr uint8_t IRREDUCIBLE_POLYNOMIAL = 0x1B;


    AESMath() = default;

};


#endif // AES_MATH_H

AESMath
Class providing some mathematical functions needed for AES.
Definition aesMath.h:25

AESMath::ffMul
static uint8_t ffMul(uint8_t x, uint8_t y)
Multiply x and y in GF(2^8) Implemented after https://en.wikipedia.org/wiki/Finite_field_arithmetic.

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

AESMath::rightRotateArray
static void rightRotateArray(uint8_t arr[], uint8_t n, uint8_t k)
Rotate an array arr of length n by k to the right.

AESMath::IRREDUCIBLE_POLYNOMIAL
static constexpr uint8_t IRREDUCIBLE_POLYNOMIAL
Irreducible polynomial: x^8 + x^4 + x^3 + x + 1.
Definition aesMath.h:59

AESMath::reverseArray
static void reverseArray(uint8_t arr[], uint8_t low, uint8_t high)
Reverse an array by swapping the lowest and highest element.

AESMath::swap
static void swap(uint8_t &a, uint8_t &b)
Swap the values of 2 integers.