import binascii

# Standard AES s-box
sbox = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x1, 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, 0x4, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x5, 0x9a, 0x7, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x9, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x0, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x2, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0xc, 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, 0xb, 0xdb, 0xe0, 0x32, 0x3a, 0xa, 0x49, 0x6, 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, 0x8, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x3, 0xf6, 0xe, 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, 0xd, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0xf, 0xb0, 0x54, 0xbb, 0x16]

# Inverse shift rows to deduce key positions
invShiftRows = [0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, 1, 6, 11]

# ShiftRows function for the plaintexts
def ShiftRows(state):
    new = [-1]*16
    # First row, no shift
    new[0] = state[0]
    new[4] = state[4]
    new[8] = state[8]
    new[12] = state[12]
    # Second row, shift left 1
    new[1] = state[5]
    new[5] = state[9]
    new[9] = state[13]
    new[13] = state[1]
    # Third row, shift left 2
    new[2] = state[10]
    new[6] = state[14]
    new[10] = state[2]
    new[14] = state[6]
    # Fourth row, shift left 3
    new[3] = state[15]
    new[7] = state[3]
    new[11] = state[7]
    new[15] = state[11]
    return bytes(new)

def getKey(number, posssibles):
    # Takes a number between 0 and 2^16 - 1 and returns a unique key
    key = [-1]*16
    for i in range(0, 16):
        key[i] = possibles[i][number % 2]
        number >>= 1
    return bytes(key)

def getRoundKey(key):
    # Given an 16-byte master key, get the first round key
    roundKey = [-1]*16
    # First column (W4)
    roundKey[0] = key[0] ^ sbox[key[13]] ^ 1
    roundKey[1] = key[1] ^ sbox[key[14]]
    roundKey[2] = key[2] ^ sbox[key[15]]
    roundKey[3] = key[3] ^ sbox[key[12]]
    # Second column (W5)
    roundKey[4] = key[4] ^ roundKey[0]
    roundKey[5] = key[5] ^ roundKey[1]
    roundKey[6] = key[6] ^ roundKey[2]
    roundKey[7] = key[7] ^ roundKey[3]
    # Third column (W6)
    roundKey[8]  = key[8]  ^ roundKey[4]
    roundKey[9]  = key[9]  ^ roundKey[5]
    roundKey[10] = key[10] ^ roundKey[6]
    roundKey[11] = key[11] ^ roundKey[7]
    # Fourth column (W7)
    roundKey[12] = key[12] ^ roundKey[8]
    roundKey[13] = key[13] ^ roundKey[9]
    roundKey[14] = key[14] ^ roundKey[10]
    roundKey[15] = key[15] ^ roundKey[11]
    return bytes(roundKey)

def encrypt(input, key):
    # Encrypts a 16-byte input with the 16-byte master key provided
    roundKey = getRoundKey(key)
    key = ShiftRows(key)
    state = list(input)
    for i in range(0, 16):
        # AddRoundKey with master key
        state[i] ^= key[i]
        # SubBytes
        state[i] = sbox[state[i]]
        # AddRoundKey with first round key
        state[i] ^= roundKey[i]
    return bytes(state)

# Load in the two plaintexts and apply ShiftRows
p1 = ShiftRows(b"the economy of m")
p2 = ShiftRows(b"achinery and man")
# Load in the two ciphertexts
c1 = binascii.unhexlify("0c9e246cb8a1bfa3b0e947a1a94c8d11")
c2 = binascii.unhexlify("998fffc15bd9cf74804d59fc23cb6e59")

# Find key values for each position
possibles = [None]*16
for i in range(0, 16):
    # Calculate E(x) ^ E(x')
    expected = c1[i] ^ c2[i]
    # Brute force values of s(x ^ k) ^ s(x' ^ k)
    for k in range(0, 256):
        result = sbox[p1[i] ^ k] ^ \
                 sbox[p2[i] ^ k]
        if result == expected:
            # Find real position of key by reversing ShiftRows
            pos = invShiftRows[i]
            print("Key byte for pos " + str(pos) + ":", hex(k), chr(k))
            # Store the possible key value
            if possibles[pos] == None:
                possibles[pos] = k
            else:
                possibles[pos] = (possibles[pos], k)

# Brute force the 2^16 possibilities
print("")
print("Searching keys...")
print("==================")
for i in range(0, 2**16):
    key = getKey(i, possibles)
    if c1 == encrypt(p1, key) and c2 == encrypt(p2, key):
        print("Key is", key.hex(), "(" + str(key) + ")")

2dc1820f241761778c911ce45447ebc424ef2e5b
<mask token>


def ShiftRows(state):
    new = [-1] * 16
    new[0] = state[0]
    new[4] = state[4]
    new[8] = state[8]
    new[12] = state[12]
    new[1] = state[5]
    new[5] = state[9]
    new[9] = state[13]
    new[13] = state[1]
    new[2] = state[10]
    new[6] = state[14]
    new[10] = state[2]
    new[14] = state[6]
    new[3] = state[15]
    new[7] = state[3]
    new[11] = state[7]
    new[15] = state[11]
    return bytes(new)


<mask token>

<mask token>


def ShiftRows(state):
    new = [-1] * 16
    new[0] = state[0]
    new[4] = state[4]
    new[8] = state[8]
    new[12] = state[12]
    new[1] = state[5]
    new[5] = state[9]
    new[9] = state[13]
    new[13] = state[1]
    new[2] = state[10]
    new[6] = state[14]
    new[10] = state[2]
    new[14] = state[6]
    new[3] = state[15]
    new[7] = state[3]
    new[11] = state[7]
    new[15] = state[11]
    return bytes(new)


def getKey(number, posssibles):
    key = [-1] * 16
    for i in range(0, 16):
        key[i] = possibles[i][number % 2]
        number >>= 1
    return bytes(key)


def getRoundKey(key):
    roundKey = [-1] * 16
    roundKey[0] = key[0] ^ sbox[key[13]] ^ 1
    roundKey[1] = key[1] ^ sbox[key[14]]
    roundKey[2] = key[2] ^ sbox[key[15]]
    roundKey[3] = key[3] ^ sbox[key[12]]
    roundKey[4] = key[4] ^ roundKey[0]
    roundKey[5] = key[5] ^ roundKey[1]
    roundKey[6] = key[6] ^ roundKey[2]
    roundKey[7] = key[7] ^ roundKey[3]
    roundKey[8] = key[8] ^ roundKey[4]
    roundKey[9] = key[9] ^ roundKey[5]
    roundKey[10] = key[10] ^ roundKey[6]
    roundKey[11] = key[11] ^ roundKey[7]
    roundKey[12] = key[12] ^ roundKey[8]
    roundKey[13] = key[13] ^ roundKey[9]
    roundKey[14] = key[14] ^ roundKey[10]
    roundKey[15] = key[15] ^ roundKey[11]
    return bytes(roundKey)


def encrypt(input, key):
    roundKey = getRoundKey(key)
    key = ShiftRows(key)
    state = list(input)
    for i in range(0, 16):
        state[i] ^= key[i]
        state[i] = sbox[state[i]]
        state[i] ^= roundKey[i]
    return bytes(state)


<mask token>

<mask token>


def ShiftRows(state):
    new = [-1] * 16
    new[0] = state[0]
    new[4] = state[4]
    new[8] = state[8]
    new[12] = state[12]
    new[1] = state[5]
    new[5] = state[9]
    new[9] = state[13]
    new[13] = state[1]
    new[2] = state[10]
    new[6] = state[14]
    new[10] = state[2]
    new[14] = state[6]
    new[3] = state[15]
    new[7] = state[3]
    new[11] = state[7]
    new[15] = state[11]
    return bytes(new)


def getKey(number, posssibles):
    key = [-1] * 16
    for i in range(0, 16):
        key[i] = possibles[i][number % 2]
        number >>= 1
    return bytes(key)


def getRoundKey(key):
    roundKey = [-1] * 16
    roundKey[0] = key[0] ^ sbox[key[13]] ^ 1
    roundKey[1] = key[1] ^ sbox[key[14]]
    roundKey[2] = key[2] ^ sbox[key[15]]
    roundKey[3] = key[3] ^ sbox[key[12]]
    roundKey[4] = key[4] ^ roundKey[0]
    roundKey[5] = key[5] ^ roundKey[1]
    roundKey[6] = key[6] ^ roundKey[2]
    roundKey[7] = key[7] ^ roundKey[3]
    roundKey[8] = key[8] ^ roundKey[4]
    roundKey[9] = key[9] ^ roundKey[5]
    roundKey[10] = key[10] ^ roundKey[6]
    roundKey[11] = key[11] ^ roundKey[7]
    roundKey[12] = key[12] ^ roundKey[8]
    roundKey[13] = key[13] ^ roundKey[9]
    roundKey[14] = key[14] ^ roundKey[10]
    roundKey[15] = key[15] ^ roundKey[11]
    return bytes(roundKey)


def encrypt(input, key):
    roundKey = getRoundKey(key)
    key = ShiftRows(key)
    state = list(input)
    for i in range(0, 16):
        state[i] ^= key[i]
        state[i] = sbox[state[i]]
        state[i] ^= roundKey[i]
    return bytes(state)


<mask token>
for i in range(0, 16):
    expected = c1[i] ^ c2[i]
    for k in range(0, 256):
        result = sbox[p1[i] ^ k] ^ sbox[p2[i] ^ k]
        if result == expected:
            pos = invShiftRows[i]
            print('Key byte for pos ' + str(pos) + ':', hex(k), chr(k))
            if possibles[pos] == None:
                possibles[pos] = k
            else:
                possibles[pos] = possibles[pos], k
print('')
print('Searching keys...')
print('==================')
for i in range(0, 2 ** 16):
    key = getKey(i, possibles)
    if c1 == encrypt(p1, key) and c2 == encrypt(p2, key):
        print('Key is', key.hex(), '(' + str(key) + ')')

<mask token>
sbox = [99, 124, 119, 123, 242, 107, 111, 197, 48, 1, 103, 43, 254, 215, 
    171, 118, 202, 130, 201, 125, 250, 89, 71, 240, 173, 212, 162, 175, 156,
    164, 114, 192, 183, 253, 147, 38, 54, 63, 247, 204, 52, 165, 229, 241, 
    113, 216, 49, 21, 4, 199, 35, 195, 24, 150, 5, 154, 7, 18, 128, 226, 
    235, 39, 178, 117, 9, 131, 44, 26, 27, 110, 90, 160, 82, 59, 214, 179, 
    41, 227, 47, 132, 83, 209, 0, 237, 32, 252, 177, 91, 106, 203, 190, 57,
    74, 76, 88, 207, 208, 239, 170, 251, 67, 77, 51, 133, 69, 249, 2, 127, 
    80, 60, 159, 168, 81, 163, 64, 143, 146, 157, 56, 245, 188, 182, 218, 
    33, 16, 255, 243, 210, 205, 12, 19, 236, 95, 151, 68, 23, 196, 167, 126,
    61, 100, 93, 25, 115, 96, 129, 79, 220, 34, 42, 144, 136, 70, 238, 184,
    20, 222, 94, 11, 219, 224, 50, 58, 10, 73, 6, 36, 92, 194, 211, 172, 98,
    145, 149, 228, 121, 231, 200, 55, 109, 141, 213, 78, 169, 108, 86, 244,
    234, 101, 122, 174, 8, 186, 120, 37, 46, 28, 166, 180, 198, 232, 221, 
    116, 31, 75, 189, 139, 138, 112, 62, 181, 102, 72, 3, 246, 14, 97, 53, 
    87, 185, 134, 193, 29, 158, 225, 248, 152, 17, 105, 217, 142, 148, 155,
    30, 135, 233, 206, 85, 40, 223, 140, 161, 137, 13, 191, 230, 66, 104, 
    65, 153, 45, 15, 176, 84, 187, 22]
invShiftRows = [0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, 1, 6, 11]


def ShiftRows(state):
    new = [-1] * 16
    new[0] = state[0]
    new[4] = state[4]
    new[8] = state[8]
    new[12] = state[12]
    new[1] = state[5]
    new[5] = state[9]
    new[9] = state[13]
    new[13] = state[1]
    new[2] = state[10]
    new[6] = state[14]
    new[10] = state[2]
    new[14] = state[6]
    new[3] = state[15]
    new[7] = state[3]
    new[11] = state[7]
    new[15] = state[11]
    return bytes(new)


def getKey(number, posssibles):
    key = [-1] * 16
    for i in range(0, 16):
        key[i] = possibles[i][number % 2]
        number >>= 1
    return bytes(key)


def getRoundKey(key):
    roundKey = [-1] * 16
    roundKey[0] = key[0] ^ sbox[key[13]] ^ 1
    roundKey[1] = key[1] ^ sbox[key[14]]
    roundKey[2] = key[2] ^ sbox[key[15]]
    roundKey[3] = key[3] ^ sbox[key[12]]
    roundKey[4] = key[4] ^ roundKey[0]
    roundKey[5] = key[5] ^ roundKey[1]
    roundKey[6] = key[6] ^ roundKey[2]
    roundKey[7] = key[7] ^ roundKey[3]
    roundKey[8] = key[8] ^ roundKey[4]
    roundKey[9] = key[9] ^ roundKey[5]
    roundKey[10] = key[10] ^ roundKey[6]
    roundKey[11] = key[11] ^ roundKey[7]
    roundKey[12] = key[12] ^ roundKey[8]
    roundKey[13] = key[13] ^ roundKey[9]
    roundKey[14] = key[14] ^ roundKey[10]
    roundKey[15] = key[15] ^ roundKey[11]
    return bytes(roundKey)


def encrypt(input, key):
    roundKey = getRoundKey(key)
    key = ShiftRows(key)
    state = list(input)
    for i in range(0, 16):
        state[i] ^= key[i]
        state[i] = sbox[state[i]]
        state[i] ^= roundKey[i]
    return bytes(state)


p1 = ShiftRows(b'the economy of m')
p2 = ShiftRows(b'achinery and man')
c1 = binascii.unhexlify('0c9e246cb8a1bfa3b0e947a1a94c8d11')
c2 = binascii.unhexlify('998fffc15bd9cf74804d59fc23cb6e59')
possibles = [None] * 16
for i in range(0, 16):
    expected = c1[i] ^ c2[i]
    for k in range(0, 256):
        result = sbox[p1[i] ^ k] ^ sbox[p2[i] ^ k]
        if result == expected:
            pos = invShiftRows[i]
            print('Key byte for pos ' + str(pos) + ':', hex(k), chr(k))
            if possibles[pos] == None:
                possibles[pos] = k
            else:
                possibles[pos] = possibles[pos], k
print('')
print('Searching keys...')
print('==================')
for i in range(0, 2 ** 16):
    key = getKey(i, possibles)
    if c1 == encrypt(p1, key) and c2 == encrypt(p2, key):
        print('Key is', key.hex(), '(' + str(key) + ')')

import binascii

# Standard AES s-box
sbox = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x1, 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, 0x4, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x5, 0x9a, 0x7, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x9, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x0, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x2, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0xc, 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, 0xb, 0xdb, 0xe0, 0x32, 0x3a, 0xa, 0x49, 0x6, 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, 0x8, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x3, 0xf6, 0xe, 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, 0xd, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0xf, 0xb0, 0x54, 0xbb, 0x16]

# Inverse shift rows to deduce key positions
invShiftRows = [0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, 1, 6, 11]

# ShiftRows function for the plaintexts
def ShiftRows(state):
    new = [-1]*16
    # First row, no shift
    new[0] = state[0]
    new[4] = state[4]
    new[8] = state[8]
    new[12] = state[12]
    # Second row, shift left 1
    new[1] = state[5]
    new[5] = state[9]
    new[9] = state[13]
    new[13] = state[1]
    # Third row, shift left 2
    new[2] = state[10]
    new[6] = state[14]
    new[10] = state[2]
    new[14] = state[6]
    # Fourth row, shift left 3
    new[3] = state[15]
    new[7] = state[3]
    new[11] = state[7]
    new[15] = state[11]
    return bytes(new)

def getKey(number, posssibles):
    # Takes a number between 0 and 2^16 - 1 and returns a unique key
    key = [-1]*16
    for i in range(0, 16):
        key[i] = possibles[i][number % 2]
        number >>= 1
    return bytes(key)

def getRoundKey(key):
    # Given an 16-byte master key, get the first round key
    roundKey = [-1]*16
    # First column (W4)
    roundKey[0] = key[0] ^ sbox[key[13]] ^ 1
    roundKey[1] = key[1] ^ sbox[key[14]]
    roundKey[2] = key[2] ^ sbox[key[15]]
    roundKey[3] = key[3] ^ sbox[key[12]]
    # Second column (W5)
    roundKey[4] = key[4] ^ roundKey[0]
    roundKey[5] = key[5] ^ roundKey[1]
    roundKey[6] = key[6] ^ roundKey[2]
    roundKey[7] = key[7] ^ roundKey[3]
    # Third column (W6)
    roundKey[8]  = key[8]  ^ roundKey[4]
    roundKey[9]  = key[9]  ^ roundKey[5]
    roundKey[10] = key[10] ^ roundKey[6]
    roundKey[11] = key[11] ^ roundKey[7]
    # Fourth column (W7)
    roundKey[12] = key[12] ^ roundKey[8]
    roundKey[13] = key[13] ^ roundKey[9]
    roundKey[14] = key[14] ^ roundKey[10]
    roundKey[15] = key[15] ^ roundKey[11]
    return bytes(roundKey)

def encrypt(input, key):
    # Encrypts a 16-byte input with the 16-byte master key provided
    roundKey = getRoundKey(key)
    key = ShiftRows(key)
    state = list(input)
    for i in range(0, 16):
        # AddRoundKey with master key
        state[i] ^= key[i]
        # SubBytes
        state[i] = sbox[state[i]]
        # AddRoundKey with first round key
        state[i] ^= roundKey[i]
    return bytes(state)

# Load in the two plaintexts and apply ShiftRows
p1 = ShiftRows(b"the economy of m")
p2 = ShiftRows(b"achinery and man")
# Load in the two ciphertexts
c1 = binascii.unhexlify("0c9e246cb8a1bfa3b0e947a1a94c8d11")
c2 = binascii.unhexlify("998fffc15bd9cf74804d59fc23cb6e59")

# Find key values for each position
possibles = [None]*16
for i in range(0, 16):
    # Calculate E(x) ^ E(x')
    expected = c1[i] ^ c2[i]
    # Brute force values of s(x ^ k) ^ s(x' ^ k)
    for k in range(0, 256):
        result = sbox[p1[i] ^ k] ^ \
                 sbox[p2[i] ^ k]
        if result == expected:
            # Find real position of key by reversing ShiftRows
            pos = invShiftRows[i]
            print("Key byte for pos " + str(pos) + ":", hex(k), chr(k))
            # Store the possible key value
            if possibles[pos] == None:
                possibles[pos] = k
            else:
                possibles[pos] = (possibles[pos], k)

# Brute force the 2^16 possibilities
print("")
print("Searching keys...")
print("==================")
for i in range(0, 2**16):
    key = getKey(i, possibles)
    if c1 == encrypt(p1, key) and c2 == encrypt(p2, key):
        print("Key is", key.hex(), "(" + str(key) + ")")
