/*
Calculates the output for given sbox (0 or 1),
returning a decimal number.
*/
int sbox_s(char *output, int i)
{
char tmp[3];
int row;
int column;
int s0;
int s1;
if (i == 0) {
//sbox_s0
tmp[0] = output[0];
tmp[1] = output[3];
tmp[2] = '\0';
row = convert_to_decimal(tmp);
tmp[0] = output[1];
tmp[1] = output[2];
tmp[2] = '\0';
column = convert_to_decimal(tmp);
s0_items();
s0 = s0_box[row][column];
return s0;
} else if (i == 1) {
//sbox_s1
tmp[0] = output[4];
tmp[1] = output[7];
tmp[2] = '\0';
row = convert_to_decimal(tmp);
tmp[0] = output[5];
tmp[1] = output[6];
tmp[2] = '\0';
column = convert_to_decimal(tmp);
s1_items();
s1 = s1_box[row][column];
return s1;
} else return -1;
}
/*
** convertie en little endian un int donnée donnée
*/
void my_little_endian(uint32_t elem, uint8_t *tab){
char *hexadecimal = malloc(sizeof(char)*8);
convertir_32(elem,hexadecimal);
convert_to_decimal(hexadecimal,tab);
free(hexadecimal);
}
void subtract(char* first_roman_value, char* second_roman_value, char* result)
{
convert_to_roman(convert_to_decimal(first_roman_value)-convert_to_decimal(second_roman_value), result);
}
void add(char* first_roman_value, char* second_roman_value, char* result)
{
convert_to_roman(convert_to_decimal(first_roman_value)+convert_to_decimal(second_roman_value), result);
}
