////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////AES: 
unsigned int xAES = 0;                // счёт xAES
 unsigned char xxAES = 0;          // счёт xxAES
unsigned char x_raund = 0;        // счёт raund (Всего 10 раунда)
////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////state:
unsigned char state[] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
////////////////////////////////////////////////////////////////////////////////
unsigned char  b_sbox = 0;           // буфер b_sbox
//sbox 0...255 (16x16) //256 байт
unsigned char sbox[]= {
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
};
////////////////////////////////////////////////////////////////////////////////
unsigned char inv_b_sbox = 0;  // буфер inv_b_sbox
//inv_sbox 0...255 (16x16)       //256 байт
unsigned char inv_sbox[]= {
0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
};
////////////////////////////////////////////////////////////////////////////////
//набор раундовых ключей для AES-256: 15 блоков по 16 байт. //0...239 байт
unsigned char KeySchedule[] = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 0
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 1
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 2
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 3
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 4
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 5  
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 6
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 7
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 8
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 9
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 10
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 11
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 12
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//раунд 13
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 //раунд 14
};
////////////////////////////////////////////////////////////////////////////////
//rcon 1...14(256)  
unsigned char rcon[] = {
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40//(256) 
};
////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////KeyExpansion():
// генерация раундовых ключей
//unsigned char Rows = 0;    // буфер Rows
unsigned int Rows = 0;       // буфер Rows
//unsigned char KE = 0;        // счёт KeyExpansion 
unsigned int KE = 0;           // счёт KeyExpansion 
unsigned char st_rcon = 0; // счёт rcon

void KeyExpansion(void) { 
st_rcon = 0;                        // сброс счёт rcon

for (KE=0; KE<192; KE = KE + 32) { // блоки по 32 байт. //0...239 байт	
		
//KeySchedule_1...14: 
for (xAES=0; xAES<4; xAES++) {        
KeySchedule[xAES+32+KE] = KeySchedule[xAES+28+KE]; // KeySchedule_0 > KeySchedule_1 (-4)   
};

Rows = KeySchedule[32+KE];               // KeySchedule_1>>> 
KeySchedule[32+KE] = KeySchedule[33+KE];
KeySchedule[33+KE] = KeySchedule[34+KE];
KeySchedule[34+KE] = KeySchedule[35+KE];
KeySchedule[35+KE] = Rows;

for (xAES=0; xAES<4; xAES++) {         // sbox > KeySchedule_1[16...19]
b_sbox = KeySchedule[xAES+32+KE];	
KeySchedule[xAES+32+KE] = sbox[b_sbox];// буфер b_sbox
};

for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[16...19] ^ KeySchedule_0[0...3]
KeySchedule[xAES+32+KE] ^= KeySchedule[xAES+KE];	  
};

//0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40//(256) 
KeySchedule[32+KE] ^= rcon[st_rcon];  // // счёт rcon [1...10]
st_rcon ++;         // счёт rcon

//
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[16...19] > KeySchedule_1[20...23] 
KeySchedule[xAES+36+KE] = KeySchedule[xAES+32+KE];	  
};
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[20...23] ^ KeySchedule_0[4...7]
KeySchedule[xAES+36+KE] ^= KeySchedule[xAES+4+KE];	  
};
//
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[20...23] > KeySchedule_1[24...27] 
KeySchedule[xAES+40+KE] = KeySchedule[xAES+36+KE];	  
};
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[24...27] ^ KeySchedule_0[8...11]
KeySchedule[xAES+40+KE] ^= KeySchedule[xAES+8+KE];	  
};
//
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[24...27] > KeySchedule_1[28...31] 
KeySchedule[xAES+44+KE] = KeySchedule[xAES+40+KE];	  
};
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[28...31] ^ KeySchedule_0[12...15]
KeySchedule[xAES+44+KE] ^= KeySchedule[xAES+12+KE];	  
};


//
for (xAES=0; xAES<4; xAES++) {         // sbox > KeySchedule_1[16...19]
b_sbox = KeySchedule[xAES+44+KE];	
KeySchedule[xAES+48+KE] = sbox[b_sbox];// буфер b_sbox
};
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[28...31] ^ KeySchedule_0[12...15]
KeySchedule[xAES+48+KE] ^= KeySchedule[xAES+16+KE];	  
};

//
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[20...23] > KeySchedule_1[24...27] 
KeySchedule[xAES+52+KE] = KeySchedule[xAES+48+KE];	  
};
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[24...27] ^ KeySchedule_0[8...11]
KeySchedule[xAES+52+KE] ^= KeySchedule[xAES+20+KE];	  
};

//
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[24...27] > KeySchedule_1[28...31] 
KeySchedule[xAES+56+KE] = KeySchedule[xAES+52+KE];	  
};
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[28...31] ^ KeySchedule_0[12...15]
KeySchedule[xAES+56+KE] ^= KeySchedule[xAES+24+KE];	  
};

//
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[24...27] > KeySchedule_1[28...31] 
KeySchedule[xAES+60+KE] = KeySchedule[xAES+56+KE];	  
};
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[28...31] ^ KeySchedule_0[12...15]
KeySchedule[xAES+60+KE] ^= KeySchedule[xAES+28+KE];	  
};

};	
////////////////////////////////////////////////////////////////////////////////
//KeySchedule_1...14: 
for (xAES=0; xAES<4; xAES++) {        
KeySchedule[xAES+32+KE] = KeySchedule[xAES+28+KE]; // KeySchedule_0 > KeySchedule_1 (-4)   
};

Rows = KeySchedule[32+KE];               // KeySchedule_1>>> 
KeySchedule[32+KE] = KeySchedule[33+KE];
KeySchedule[33+KE] = KeySchedule[34+KE];
KeySchedule[34+KE] = KeySchedule[35+KE];
KeySchedule[35+KE] = Rows;

for (xAES=0; xAES<4; xAES++) {         // sbox > KeySchedule_1[16...19]
b_sbox = KeySchedule[xAES+32+KE];	
KeySchedule[xAES+32+KE] = sbox[b_sbox];// буфер b_sbox
};

for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[16...19] ^ KeySchedule_0[0...3]
KeySchedule[xAES+32+KE] ^= KeySchedule[xAES+KE];	  
};

//0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40//(256) 
KeySchedule[32+KE] ^= rcon[st_rcon];  // // счёт rcon [1...10]
st_rcon ++;         // счёт rcon

//
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[16...19] > KeySchedule_1[20...23] 
KeySchedule[xAES+36+KE] = KeySchedule[xAES+32+KE];	  
};
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[20...23] ^ KeySchedule_0[4...7]
KeySchedule[xAES+36+KE] ^= KeySchedule[xAES+4+KE];	  
};
//
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[20...23] > KeySchedule_1[24...27] 
KeySchedule[xAES+40+KE] = KeySchedule[xAES+36+KE];	  
};
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[24...27] ^ KeySchedule_0[8...11]
KeySchedule[xAES+40+KE] ^= KeySchedule[xAES+8+KE];	  
};
//
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[24...27] > KeySchedule_1[28...31] 
KeySchedule[xAES+44+KE] = KeySchedule[xAES+40+KE];	  
};
for (xAES=0; xAES<4; xAES++) {        // KeySchedule_1[28...31] ^ KeySchedule_0[12...15]
KeySchedule[xAES+44+KE] ^= KeySchedule[xAES+12+KE];	  
};

}
////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////Key:
//////////////////////////////////////// K_int[128] 
unsigned char  K_int[] = {
////////////////////////////////////////0...15
////////////////vektor_0: 16 байт 
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
////////////////////////////////////////16...31
////////////////vektor_1: 16 байт 
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
////////////////////////////////////////32...47
////////////////vektor_2: 16 байт 
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
////////////////////////////////////////48...79
////////////////Key_0: 32 байт  
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
////////////////////////////////////////80...111
////////////////Key_1: 32 байт 
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
////////////////////////////////////////112...143
////////////////Key_2: 32 байт  
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
////////////////////////////////////////144...157
////////////////Флаги: 14 байт  
0,0,0,0,0,0,0,0,0,0,0,0,0,0,
////////////////////////////////////////158...159
////////////////crc: 2 байт  
0,0
};
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////счёт vektor_0:
void vektor_0(void) {
////////////////////////////////////////0...15
K_int[0] = GS_TX();  //GS = 1...255  
////////////////////////////////////////счёт вектор:          
if (K_int[1] == 0) { //проверка MAX K_int[] больше    
for (xAES=15; xAES>1; xAES--) {        
if (K_int[xAES] == 0xFF) {K_int[xAES]=0;}  
else {K_int[xAES]++; xAES=1;}; 
};
}
}	
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////счёт vektor_1:
void vektor_1(void) {  
////////////////////////////////////////16...31
K_int[16] = GS_TX();  //GS = 1...255 
////////////////////////////////////////счёт вектор:          
if (K_int[17] == 0) { //проверка MAX K_int[] больше    
for (xAES=31; xAES>17; xAES--) {        
if (K_int[xAES] == 0xFF) {K_int[xAES]=0;}  
else {K_int[xAES]++; xAES=1;}; 
};
}
}	
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////счёт vektor_2:
void vektor_2(void) { 
////////////////////////////////////////32...47
K_int[32] = GS_TX();  //GS = 1...255 
////////////////////////////////////////счёт вектор:          
if (K_int[33] == 0) { //проверка MAX K_int[] больше    
for (xAES=47; xAES>33; xAES--) {        
if (K_int[xAES] == 0xFF) {K_int[xAES]=0;}  
else {K_int[xAES]++; xAES=1;};//
};
}
}	
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////Key_0 > KeySchedule:
void Key_0_Key(void) {
  for (xAES=0; xAES<32; xAES++) {        
    KeySchedule[xAES] = K_int[xAES];    // Key_0 > KeySchedule      
  };
  ///////////////////////////////
  KeyExpansion();	              // генерация раундовых ключей
}

////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////Key_1 > KeySchedule:
void Key_1_Key(void) {
  for (xAES=0; xAES<32; xAES++) {        
    KeySchedule[xAES] = K_int[xAES+80]; // K_int > KeySchedule    
  };
  ///////////////////////////////
  KeyExpansion();	              // генерация раундовых ключей
}
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////Key_2 > KeySchedule:
void Key_2_Key(void) {
  for (xAES=0; xAES<32; xAES++) {        
    KeySchedule[xAES] = K_int[xAES+112]; // K_int > KeySchedule  
  };
  ///////////////////////////////
  KeyExpansion();	              // генерация раундовых ключей
}
////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////SubBytes():
void SubBytes(void) { 
  for (xAES=0; xAES<16; xAES++) {    // sbox > state[0...15]
    b_sbox = state[xAES];	         // буфер b_sbox
    state[xAES] = sbox[b_sbox];	
  };
}
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////InvSubBytes():
void InvSubBytes(void) { 
  for (xAES=0; xAES<16; xAES++) {   // inv_sbox > state[0...15]
	inv_b_sbox = state[xAES];	    // буфер inv_b_sbox
	state[xAES] = inv_sbox[inv_b_sbox];	
  };
}
////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////ShiftRows():
//unsigned int Rows = 0;           // буфер Rows
void ShiftRows(void) { 
Rows = state[1]; 
state[1] = state[5]; 
state[5] = state[9]; 
state[9] = state[13]; 
state[13] = Rows;

Rows = state[2]; 
state[2] = state[10]; 
state[10] = Rows;
Rows = state[6]; 
state[6] = state[14]; 
state[14] = Rows;

Rows = state[3]; 
state[3] = state[15]; 
state[15] = state[11];
state[11] = state[7];
state[7] = Rows;
}
////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////InvShiftRows():
//unsigned int Rows = 0;           // буфер Rows
void InvShiftRows(void) { 
Rows = state[1]; 
state[1] = state[13]; 
state[13] = state[9]; 
state[9] = state[5]; 
state[5] = Rows;

Rows = state[2]; 
state[2] = state[10]; 
state[10] = Rows;
Rows = state[6]; 
state[6] = state[14]; 
state[14] = Rows;

Rows = state[3]; 
state[3] = state[7]; 
state[7] = state[11];
state[11] = state[15];
state[15] = Rows;
}
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////MixColumns():
unsigned char state_0 = 0;       // буфер state
unsigned char state_1 = 0;       // буфер state
unsigned char state_2 = 0;       // буфер state
unsigned char state_3 = 0;       // буфер state
//////////////////////////////////
unsigned char bMix = 0; 
void Mix(void) {
   if (bMix & 0x80)  bMix = ( bMix << 1 ) ^ 0x1b; //0x1B//P(x)=x^8+x^4+x^3+x+1
   else                    bMix =   bMix << 1;
}
//////////////////////////////////
void MixColumns(void) { 
for (xAES=0; xAES<16; xAES=xAES+4) { // state[0...15] // 1 цикл = 0,000.4 c 
////////////////////////////////// state[0]:
//*2 //n*{02} 
bMix = state[xAES]; Mix(); state_0 = bMix;
//*3 //n*{02} + n*{01}
bMix = state[xAES+1]; Mix(); state_0 ^= bMix;
state_0 ^= state[xAES+1];  
//*1 //n*{01}
state_0 ^= state[xAES+2];  
//*1 //n*{01}
state_0 ^= state[xAES+3];  
////////////////////////////////// state[1]:
//*1 //n*{01}
state_1 = state[xAES];  
//*2 //n*{02}
bMix = state[xAES+1]; Mix(); state_1^= bMix;
//*3 //n*{02} + n*{01}
bMix = state[xAES+2]; Mix(); state_1^= bMix;
state_1 ^= state[xAES+2];
//*1 //n*{01}
state_1 ^= state[xAES+3];  
////////////////////////////////// state[2]:
//*1 //n*{01}
state_2 = state[xAES];
//*1 //n*{01}
state_2 ^= state[xAES+1]; 
//*2 //n*{02}
bMix = state[xAES+2]; Mix(); state_2^= bMix;
//*3 //n*{02} + n*{01}
bMix = state[xAES+3]; Mix(); state_2^= bMix;
state_2 ^= state[xAES+3];  
////////////////////////////////// state[3]:
//*3 //n*{02} + n*{01}
bMix = state[xAES]; Mix(); state_3 = bMix;
state_3 ^= state[xAES];
//*1 //n*{01}
state_3 ^= state[xAES+1]; 
//*1 //n*{01}
state_3 ^= state[xAES+2];
//*2 //n*{02}
bMix = state[xAES+3]; Mix(); 
state_3 ^= bMix;
////////////////////////////////// state_0,1,2,3 > state[0...3]:
state[xAES] = state_0; state[xAES+1] = state_1; state[xAES+2] = state_2; state[xAES+3] = state_3;       
////////////////////////////////// 
};
}
////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////InvMixColumns():
void InvMixColumns(void) { 
for (xAES=0; xAES<16; xAES=xAES+4) { // state[0...15]// 1 цикл = 0,001.5 c
////////////////////////////////// state[0]:
//*e //n*{02}*{02}*{02} + n*{02}*{02} + n*{02}
bMix = state[xAES]; Mix(); Mix(); Mix(); state_0 = bMix;
bMix = state[xAES]; Mix(); Mix(); state_0 ^= bMix;
bMix = state[xAES]; Mix(); state_0 ^= bMix;
//*b //n*{02}*{02}*{02} + n*{02} + n*{01}
bMix = state[xAES+1]; Mix(); Mix(); Mix(); state_0 ^= bMix;
bMix = state[xAES+1]; Mix(); state_0 ^= bMix;
state_0 ^=  state[xAES+1];  
//*d //n*{02}*{02}*{02} + n*{02}*{02} + n*{01}
bMix = state[xAES+2]; Mix(); Mix(); Mix(); state_0 ^= bMix;
bMix = state[xAES+2]; Mix(); Mix(); state_0 ^= bMix;
state_0 ^= state[xAES+2];   
//*9 //n*{02}*{02}*{02} + n*{01}
bMix = state[xAES+3]; Mix(); Mix(); Mix(); state_0 ^= bMix;
state_0 ^= state[xAES+3];  
////////////////////////////////// state[1]:
//*9 //n*{02}*{02}*{02} + n*{01}
bMix = state[xAES]; Mix(); Mix(); Mix(); state_1 = bMix;
state_1 ^= state[xAES]; 
//*e //n*{02}*{02}*{02} + n*{02}*{02} + n*{02}
bMix = state[xAES+1]; Mix(); Mix(); Mix(); state_1 ^= bMix;
bMix = state[xAES+1]; Mix(); Mix(); state_1 ^= bMix;
bMix = state[xAES+1]; Mix(); state_1 ^= bMix;
//*b //n*{02}*{02}*{02} + n*{02} + n*{01}
bMix = state[xAES+2]; Mix(); Mix(); Mix(); state_1 ^= bMix;
bMix = state[xAES+2]; Mix(); state_1 ^= bMix;
state_1 ^= state[xAES+2];   
//*d //n*{02}*{02}*{02} + n*{02}*{02} + n*{01}
bMix = state[xAES+3]; Mix(); Mix(); Mix(); state_1 ^= bMix;
bMix = state[xAES+3]; Mix(); Mix(); state_1 ^= bMix;	
state_1 ^= state[xAES+3];  
////////////////////////////////// state[2]:
//*d //n*{02}*{02}*{02} + n*{02}*{02} + n*{01}
bMix = state[xAES]; Mix(); Mix(); Mix(); state_2 = bMix;
bMix = state[xAES]; Mix(); Mix(); state_2 ^= bMix;
state_2 ^= state[xAES];  
//*9 //n*{02}*{02}*{02} + n*{01}
bMix = state[xAES+1]; Mix(); Mix(); Mix(); state_2 ^= bMix;
state_2 ^= state[xAES+1];   
//*e //n*{02}*{02}*{02} + n*{02}*{02} + n*{02}
bMix = state[xAES+2]; Mix(); Mix(); Mix(); state_2 ^= bMix;	
bMix = state[xAES+2]; Mix(); Mix(); state_2 ^= bMix;
bMix = state[xAES+2]; Mix(); state_2 ^= bMix;
//*b //n*{02}*{02}*{02} + n*{02} + n*{01}
bMix = state[xAES+3]; Mix(); Mix(); Mix(); state_2 ^= bMix;
bMix = state[xAES+3]; Mix(); state_2 ^= bMix;	
state_2 ^= state[xAES+3];   
////////////////////////////////// state[3]:
//*b //n*{02}*{02}*{02} + n*{02} + n*{01}
bMix = state[xAES]; Mix(); Mix(); Mix(); state_3 = bMix;	
bMix = state[xAES]; Mix(); state_3 ^= bMix;	
state_3 ^= state[xAES]; 
//*d //n*{02}*{02}*{02} + n*{02}*{02} + n*{01}
bMix = state[xAES+1]; Mix(); Mix(); Mix(); state_3 ^= bMix;	
bMix = state[xAES+1]; Mix(); Mix(); state_3 ^= bMix;	
state_3 ^= state[xAES+1]; 
//*9 //n*{02}*{02}*{02} + n*{01}
bMix = state[xAES+2]; Mix(); Mix(); Mix(); state_3 ^= bMix;	
state_3 ^= state[xAES+2];
//*e //n*{02}*{02}*{02} + n*{02}*{02} + n*{02}
bMix = state[xAES+3]; Mix(); Mix(); Mix(); state_3 ^= bMix;	
bMix = state[xAES+3]; Mix(); Mix(); state_3 ^= bMix;	
bMix = state[xAES+3]; Mix(); state_3 ^= bMix;	
////////////////////////////////// state_0,1,2,3 > state[0...3]:
state[xAES] = state_0; state[xAES+1] = state_1; state[xAES+2] = state_2; state[xAES+3] = state_3;       
////////////////////////////////// 
};
}
////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////AddRoundKey():
void AddRoundKey(void) { 
xxAES = (x_raund << 4);       
  for (xAES=0; xAES<16; xAES++) {        
    state[xAES] ^= KeySchedule[xxAES];   // state ^ KeySchedule
    xxAES ++;       
  };
 }
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////Шифрование:
void encrypt(void) { 
x_raund = 0;                   
AddRoundKey(); 

for (x_raund=1; x_raund<14; x_raund++) { //x_raund=1...x_raund=14
SubBytes();
ShiftRows();
MixColumns();
AddRoundKey(); 
};

x_raund = 14;                   
SubBytes();
ShiftRows();
AddRoundKey(); 
}
////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////Расшифрование: 
void decrypt(void) { 
x_raund = 14;          	
AddRoundKey(); 

for (x_raund=13; x_raund>0; x_raund--) { //x_raund=13...x_raund=1
InvShiftRows();
InvSubBytes();
AddRoundKey(); 
InvMixColumns();
};

x_raund = 0;  
InvShiftRows();
InvSubBytes();
AddRoundKey(); 
}
////////////////////////////////////////////////////////////////////////////////
encrypt(); // encrypt
decrypt(); // decrypt
////////////////////////////////////////////////////////////////////////////////