#include "pch.h"
#include <iostream>
#include <vector>
#include <cstdlib>
#include <ctime>

class AES
{
    uint8_t S_BOX[256] =
    {
            0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76,
            0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0,
            0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15,
            0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75,
            0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84,
            0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF,
            0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8,
            0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2,
            0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73,
            0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB,
            0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79,
            0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08,
            0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A,
            0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E,
            0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF,
            0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16
    };
    uint8_t key[16];
    uint8_t extkey[176];
    void rotate_vect(uint8_t vect[]);
    void sub_sbox(uint8_t vect[]);
    void rcon(uint8_t vect[], int number);
    void xor_append(uint8_t* block, uint8_t vect[]);
    void sub_sbox2(uint8_t vect[4][4]);

public:
    void generate_key128(uint8_t key[], uint8_t extkey[]);
    void ciphertext(const uint8_t text[4][4], const uint8_t key[]);
    void shift_rows(uint8_t matrix[4][4]);
    vector< vector< vector<char> > >  stringtomatrix(string inputdata);
    AES();

};

AES::AES()
{
    for (int i = 0; i < 16; i++)
    {
        key[i] = (std::rand()) + 256;
        //std::cout << (int)key[i]<<std::endl;
    }


    for (int i = 0; i < 176; i++)
    {
        if (i < 16)
            std::cout << (int)extkey[i] << " --- --- " << (int)key[i] << std::endl;
        else
            std::cout << (int)extkey[i] << std::endl;
    }


    std::cout << "!@#@$&*^%$##@#%%&^%$%$#@$#$^*^&^%$!#@$%$^&%^%%@$!$@%#" << std::endl;

    stringtomatrix(string inputdata) {
    vector< vector<char> > matrix(2, vector <char>(2)); //declaration 2x2 matrix (4bytes x 4bytes)
    vector< vector< vector<char> > >tab4;

    int counter = 0;
    int k = out.length(); //the length of the input data
    int division = k/4; //dividing into 4, because there are 4 char in each matrix
    int rest=k%4; //the rest from dividing into 4

    for(int t=0;t<division;t++) {
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                tab[i][j] = inputdata[counter]; //giving input data into the matrix
                counter++;
            }
        }
        tab4.push_back(tab);
    }
    int o=k-rest+1;
    for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                tab[i][j] = inputdata[o];
                o++;
            }
        }
    tab4.push_back(tab);

return vector< vector< vector<char> > >tab4;
}


    generate_key128(key, extkey);

    for (int i = 0; i < 176; i++)
    {
        if (i < 16)
            std::cout << (int)extkey[i] << " --- --- " << (int)key[i] << std::endl;
        else
            std::cout << (int)extkey[i] << std::endl;
    }
}


void AES::rotate_vect(uint8_t vect[])
{
    uint8_t temp = vect[0];
    memmove(vect, vect + 1, 3);
    memcpy(vect + 3, &temp, 1);
}

void AES::sub_sbox(uint8_t vect[])
{
    for (int i = 0; i < 4; i++)
    {
        vect[i] = S_BOX[vect[i]];
    }
}

void AES::rcon(uint8_t vect[], int number)
{
    vect[0] ^= (int)pow(2, number);
}

void AES::xor_append(uint8_t* block, uint8_t vect[])
{
    uint8_t temp2[4];
    memcpy(&temp2, block, 4);
    for (int i = 0; i < 4; i++)
    {
        vect[i] ^= temp2[i];
    }
    memcpy(block + 16, vect, 4);
}

void AES::generate_key128(uint8_t key[], uint8_t extkey[])
{
    memcpy(extkey, key, 16);
    uint8_t state = 16;
    uint8_t temp[4];
    for (int i = 1;state<176; i++)
    {
        memcpy(temp, extkey + (state - 4), 4);
        rotate_vect(temp);
        sub_sbox(temp);
        rcon(temp, i-1);
        xor_append(extkey + state - 16, temp);
        state += 4;
        for (int s = 0; s < 3; s++)
        {
            memcpy(temp, extkey + (state - 4), 4);
            xor_append(extkey + state - 16, temp);
            state += 4;
        }
    }
}

void AES::sub_sbox2(uint8_t vect[4][4])
{
    for (int i = 0; i < 4; i++)
    {
        sub_sbox(vect[i]);
    }
}

void AES::shift_rows(uint8_t matrix[4][4])
{

}
void AES::ciphertext(const uint8_t text[4][4], const uint8_t key[])
{
    uint8_t temp[4][4];
    uint8_t ciphered[4][4];
    memcpy(ciphered, text, 16);
    memcpy(temp, key, 16);
    // Initial round
    for (int i = 0; i < 4; i++)
    {
        for (int j = 0; j < 4; j++)
        {
            ciphered[i][j] ^= temp[i][j];
        }
    }
    // 9 repeats
    for (int i = 0; i < 9; i++)
    {
        sub_sbox2(ciphered);
        shift_rows(ciphered);
    }

}


int main()
{
    srand(time(NULL));
    AES test;
}