 # Rijndael S-box

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]

        # Rijndael Inverted S-box
rsbox = [
            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]


def keyExpansionCore(x,i):
     #one left shift
     t=x[0]
     x[0]=x[1]
     x[1]=x[2]
     x[2]=x[3]
     x[3]=t

     x[0]=sbox[x[0]]
     x[1]=sbox[x[1]]
     x[2]=sbox[x[2]]
     x[3]=sbox[x[3]]

def keyExpansion():

    def subBytes(state):
        for i in range(16):
            state[i]=sbox[state[i]]

    def shiftRows(state):
        tmp[0] = state[0]
        tmp[1] = state[5]
        tmp[2] = state[10]
        tmp[3] = state[15]
        tmp[4] = state[4]
        tmp[5] = state[9]
        tmp[6] = state[14]
        tmp[7] = state[3]
        tmp[8] = state[8]
        tmp[9] = state[13]
        tmp[10] = state[2]
        tmp[11] = state[7]
        tmp[12] = state[12]
        tmp[13] = state[1]
        tmp[14] = state[6]
        tmp[15] = state[11]
        for i in range(16):
            state[i] = tmp[i]

    def mixColumns():
        tmp[0] = (mul2[state[0]] ^ mul3[state[1]] ^ state[2] ^ state[3])
        tmp[1] = (state[0] ^ mul2[state[1]] ^ mul3[state[2]] ^ state[3])
        tmp[2] = (state[0] ^ state[1] ^ mul2[state[2]] ^ mul3[state[3]])
        tmp[3] = (mul3[state[0]] ^ state[1] ^ state[2] ^ mul2[state[3]])

        tmp[4] = (mul2[state[4]] ^ mul3[state[5]] ^ state[6] ^ state[7])
        tmp[5] = (state[4] ^ mul2[state[5]] ^ mul3[state[6]] ^ state[7])
        tmp[6] = (state[4] ^ state[5] ^ mul2[state[6]] ^ mul3[state[7]])
        tmp[7] = (mul3[state[4]] ^ state[5] ^ state[6] ^ mul2[state[7]])

        tmp[8] = (mul2[state[8]] ^ mul3[state[9]] ^ state[10] ^ state[11])
        tmp[9] = (state[8] ^ mul2[state[9]] ^ mul3[state[10]] ^ state[11])
        tmp[10] = (state[8] ^ state[9] ^ mul2[state[10]] ^ mul3[state[11]])
        tmp[11] = (mul3[state[8]] ^ state[9] ^ state[10] ^ mul2[state[11]])

        tmp[12] = (mul2[state[12]] ^ mul3[state[13]] ^ state[14] ^ state[15])
        tmp[13] = (state[12] ^ mul2[state[13]] ^ mul3[state[14]] ^ state[15])
        tmp[14] = (state[12] ^ state[13] ^ mul2[state[14]] ^ mul3[state[15]])
        tmp[15] = (mul3[state[12]] ^ state[13] ^ state[14] ^ mul2[state[15]])

        for i in range(16):
            state[i] = tmp[i]

    def addRoundKey(state: object, roundKey):
        for i in range(16):
            state[i] ^= roundKey[i]

def encrypt(message, key):
    for i in range(len(message)):
        state[i]=message[i]

    numberOfRounds = 1
    keyExpansion()
    addRoundKey(state,key)
    for round in range(numberOfRounds):
        subBytes(state)
        shiftRows(state)
        mixColumns()
        addRoundKey(state,key)
    #Final round
    subBytes(state)
    shiftRows(state)
    addRoundKey(state, key)

def main():
	key=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16]
	text=open("C:\\Users\\vinnu\Downloads\\New folder\\vin.txt","r")
	encrypt(text.read(),key)
if __name__ == "__main__":
    main()

from Crypto.Cipher import AES

key = b'Sixteen byte key'
cipher = AES.new(key , AES.MODE_EAX)
plaintext = cipher.decrypt(ciphertext)
try:
    cipher.verify(tag)
    print("the message is authentic:", plaintext)
except ValueError:
    print("Key incorrect or message corrupted")
