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controller2.py
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substitutionBox = [
["63", "7c", "77", "7b", "f2", "6b", "6f", "c5", "30", "01", "67", "2b", "fe", "d7", "ab", "76"],
["ca", "82", "c9", "7d", "fa", "59", "47", "f0", "ad", "d4", "a2", "af", "9c", "a4", "72", "c0"],
["b7", "fd", "93", "26", "36", "3f", "f7", "cc", "34", "a5", "e5", "f1", "71", "d8", "31", "15"],
["04", "c7", "23", "c3", "18", "96", "05", "9a", "07", "12", "80", "e2", "eb", "27", "b2", "75"],
["09", "83", "2c", "1a", "1b", "6e", "5a", "a0", "52", "3b", "d6", "b3", "29", "e3", "2f", "84"],
["53", "d1", "00", "ed", "20", "fc", "b1", "5b", "6a", "cb", "be", "39", "4a", "4c", "58", "cf"],
["d0", "ef", "aa", "fb", "43", "4d", "33", "85", "45", "f9", "02", "7f", "50", "3c", "9f", "a8"],
["51", "a3", "40", "8f", "92", "9d", "38", "f5", "bc", "b6", "da", "21", "10", "ff", "f3", "d2"],
["cd", "0c", "13", "ec", "5f", "97", "44", "17", "c4", "a7", "7e", "3d", "64", "5d", "19", "73"],
["60", "81", "4f", "dc", "22", "2a", "90", "88", "46", "ee", "b8", "14", "de", "5e", "0b", "db"],
["e0", "32", "3a", "0a", "49", "06", "24", "5c", "c2", "d3", "ac", "62", "91", "95", "e4", "79"],
["e7", "c8", "37", "6d", "8d", "d5", "4e", "a9", "6c", "56", "f4", "ea", "65", "7a", "ae", "08"],
["ba", "78", "25", "2e", "1c", "a6", "b4", "c6", "e8", "dd", "74", "1f", "4b", "bd", "8b", "8a"],
["70", "3e", "b5", "66", "48", "03", "f6", "0e", "61", "35", "57", "b9", "86", "c1", "1d", "9e"],
["e1", "f8", "98", "11", "69", "d9", "8e", "94", "9b", "1e", "87", "e9", "ce", "55", "28", "df"],
["8c", "a1", "89", "0d", "bf", "e6", "42", "68", "41", "99", "2d", "0f", "b0", "54", "bb", "16"]
]
inverseSubstitutionBox = [
["52", "09", "6a", "d5", "30", "36", "a5", "38", "bf", "40", "a3", "9e", "81", "f3", "d7", "fb"],
["7c", "e3", "39", "82", "9b", "2f", "ff", "87", "34", "8e", "43", "44", "c4", "de", "e9", "cb"],
["54", "7b", "94", "32", "a6", "c2", "23", "3d", "ee", "4c", "95", "0b", "42", "fa", "c3", "4e"],
["08", "2e", "a1", "66", "28", "d9", "24", "b2", "76", "5b", "a2", "49", "6d", "8b", "d1", "25"],
["72", "f8", "f6", "64", "86", "68", "98", "16", "d4", "a4", "5c", "cc", "5d", "65", "b6", "92"],
["6c", "70", "48", "50", "fd", "ed", "b9", "da", "5e", "15", "46", "57", "a7", "8d", "9d", "84"],
["90", "d8", "ab", "00", "8c", "bc", "d3", "0a", "f7", "e4", "58", "05", "b8", "b3", "45", "06"],
["d0", "2c", "1e", "8f", "ca", "3f", "0f", "02", "c1", "af", "bd", "03", "01", "13", "8a", "6b"],
["3a", "91", "11", "41", "4f", "67", "dc", "ea", "97", "f2", "cf", "ce", "f0", "b4", "e6", "73"],
["96", "ac", "74", "22", "e7", "ad", "35", "85", "e2", "f9", "37", "e8", "1c", "75", "df", "6e"],
["47", "f1", "1a", "71", "1d", "29", "c5", "89", "6f", "b7", "62", "0e", "aa", "18", "be", "1b"],
["fc", "56", "3e", "4b", "c6", "d2", "79", "20", "9a", "db", "c0", "fe", "78", "cd", "5a", "f4"],
["1f", "dd", "a8", "33", "88", "07", "c7", "31", "b1", "12", "10", "59", "27", "80", "ec", "5f"],
["60", "51", "7f", "a9", "19", "b5", "4a", "0d", "2d", "e5", "7a", "9f", "93", "c9", "9c", "ef"],
["a0", "e0", "3b", "4d", "ae", "2a", "f5", "b0", "c8", "eb", "bb", "3c", "83", "53", "99", "61"],
["17", "2b", "04", "7e", "ba", "77", "d6", "26", "e1", "69", "14", "63", "55", "21", "0c", "7d"]
]
count = 0
# JUST USED FOR PREPROCESSING
# BUILD A MATRIX FROM A STRING
def Initiate(cipherKey):
keys = []
w = []
str1 = ""
for i in range(0, len(cipherKey)):
if cipherKey[i] == " ":
if len(str1) == 2:
w.append(str1)
str1 = ""
if len(w) == 4:
keys.append(w)
w = []
else:
str1 = str1 + cipherKey[i]
if i + 1 >= len(cipherKey):
w.append(str1)
keys.append(w)
return keys
# ROTATING OF THE WORD BY THE FACTOR EQUAL TO NUMBER OF BYTES
def RotWord(temp, bytes=2):
word = temp[bytes:]
word = word + temp[0:bytes]
return word
# GET SUBSTITUTION BOX VALUE
def GetBoxValue(temp):
row = int(temp[0], 16)
column = int(temp[1], 16)
return substitutionBox[row][column]
# SUBSTITUTE A VALUE AFTER GETTING FROM THE BOX
def SubWord(temp):
result = ""
str1 = ""
for i in range(0, len(temp)):
str1 = str1 + temp[i]
# If two character combined
if len(str1) == 2:
result = result + GetBoxValue(str1)
str1 = ""
return result
# TAKE TWO NUMBER AND PERFORM XOR
def PerformXOR(number1, number2):
result = int(number1, 16) ^ int(number2, 16)
return hex(result)
def XorRcon(temp, binary):
result = PerformXOR(temp, binary)
# If the user wants to get rid of the suffix '0b' at the start
return result[2:]
def TempXor(present, less):
less = "".join(less)
# Performing XOR
result = PerformXOR(present, less)
# Returning after taking XOR
result = result[2:]
# APPENDING MORE ZEROS AT THE LEFT SIDE IF LESS THAN EIGHT ZEROS
if len(result) < 8:
while True:
print("Appending")
result = "0" + result
if len(result) == 8:
break
return result
def FormMatrix(temp):
final = [
[],
[],
[],
[]
]
for i in range(0, len(temp)):
for j in range(0, len(temp[i])):
final[j].append(temp[i][j])
return final
def SubBytes(matrix):
for i in range(0, len(matrix)):
for j in range(0, len(matrix[i])):
matrix[i][j] = GetBoxValue(matrix[i][j])
return matrix
def ShiftRows(matrix):
shiftMatrix = []
for i in range(0, len(matrix)):
# Converting list to string for shifting bytes
temp = "".join(matrix[i])
# Now shifting bytes
shiftResult = RotWord(temp, i * 2)
w = []
str1 = ""
for j in range(0, len(shiftResult)):
# Appending character by character to the string
str1 = str1 + shiftResult[j]
if len(str1) == 2:
w.append(str1)
# Emptying the string for storing next two character
str1 = ""
shiftMatrix.append(w)
return shiftMatrix
# ***************************************************************************************************
# ////////////////////////////////////// GALOIS FIELD //////////////////////////////////////////////
# ***************************************************************************************************
# THIS FUNCTION TAKES A STRING AS ARGUMENT AND APPEND BITS IF THEY ARE LESS
def Complete8Bits(binary):
# IF 8 BITS NOT PRESENT
if len(binary) < 8:
while True:
binary = "0" + binary
if len(binary) == 8:
break
return binary
# THIS FUNCTION TAKES A HEXADECIMAL(STRING) NUMBER AND RETURNS A BINARY(STRING) OF IT
def getBinary(temp):
# Convert HEX TO BINARY
binary = bin(int(temp, 16)).zfill(0)
# IF THE USER WANTS TO GET RID OF THE SUFFIX '0b' AT THE START
binary = binary[2:]
result = Complete8Bits(binary)
return result
# THIS FUNCTION CONVERTS A BINARY NUMBER TO DECIMAL
def BinToHex(n):
# CONVERT BINARY TO INT
num = int(n, 2)
# CONVERT INT TO HEXADECIMAL
hex_num = hex(num)
return hex_num
# THIS FUNCTION TAKES TWO NUMBERS AS ARGUMENT AND PERFORM XOR
def OperationXor(number1, number2):
# TAKING XOR
result = int(number1, 16) ^ int(number2, 16)
result = hex(result)
result = result[2:]
result = Complete8Bits(result)
return result
# THIS FUNCTION WILL TAKE NUMBERS AND THEN MAKE THE GALLIOS FIELD MULTIPLICATION
def multiply(fx, gx):
# FIRST OCCURRENCE OF 1 FROM LEFT SIDE
index = gx.find("1")
index = (len(gx) - 1) - index
# APPENDING ALL THE RESULTS
values = []
values.append(fx)
for k in range(0, index):
# IF LEFT MOST BIT IS (0) THAN ONLY PERFORM THE LEFT SHIFT
if fx[0] == "0":
fx = fx[1:]
fx = fx + "0"
values.append(fx)
# IF LEFT MOST BIT IS (1) THAN PERFORM THE LEFT SHIFT AND XOR
else:
fx = fx[1:]
fx = fx + "0"
# TAKING X0R
const = "00011011"
fx = OperationXor(fx, const)
values.append(fx)
values.reverse()
# MAKING A LIST OF LENGTH 8 EQUAL TO g(x)
while True:
if len(values) == 8:
break
values.insert(0, "00000000")
# print("Values : ", values)
# TAKING XOR OF ALL THE VALUES AT THE END
result = "00000000"
for i in range(0, len(gx)):
if gx[i] == "1":
result = OperationXor(values[i], result)
return result
def GaloisField(matrix, comp):
if comp == 0:
const = [
["02", "03", "01", "01"],
["01", "02", "03", "01"],
["01", "01", "02", "03"],
["03", "01", "01", "02"]
]
else:
const = [
["0E", "0B", "0D", "09"],
["09", "0E", "0B", "0D"],
["0D", "09", "0E", "0B"],
["0B", "0D", "09", "0E"]
]
final = [
[0, 0, 0, 0],
[0, 0, 0, 0],
[0, 0, 0, 0],
[0, 0, 0, 0]
]
finalValue = []
for i in range(0, len(matrix)):
for j in range(0, len(matrix[i])):
# FOR MATRIX MULTIPLICATION
for k in range(0, 4):
# print(const[i][k], " X ", matrix[k][j])
#
gx = getBinary(const[i][k])
fx = getBinary(matrix[k][j])
result = multiply(fx, gx)
finalValue.append(result)
# TAKING X0R OF ALL THE VALUES
result = "00000000"
for k in range(0, len(finalValue)):
result = OperationXor(finalValue[k], result)
# print("Result : ", BinToHexa(result))
# CONVERTING BINARY TO HEXADECIMAL
# If the user wants to get rid of the suffix '0b' at the start
final[i][j] = BinToHex(result)[2:]
finalValue = []
return final
def GetInverseBoxValue(temp):
row = int(temp[0], 16)
column = int(temp[1], 16)
return inverseSubstitutionBox[row][column]
def AddRoundKey(mixcol, key):
result = [
[0, 0, 0, 0],
[0, 0, 0, 0],
[0, 0, 0, 0],
[0, 0, 0, 0]
]
for i in range(len(key)):
for j in range(len(key[0])):
value = OperationXor(mixcol[i][j], key[i][j])
result[i][j] = value[6:]
return result
def InverseSubBytes(matrix):
for i in range(0, len(matrix)):
for j in range(0, len(matrix[i])):
matrix[i][j] = GetInverseBoxValue(matrix[i][j])
return matrix
def CircularShift(temp, bytes=2):
stop = len(temp) - bytes
word = temp[0:stop]
word = temp[stop:] + word
return word
def InverseShiftRows(matrix):
for i in range(0, len(matrix)):
for j in range(0, len(matrix[i])):
matrix[i][j] = transform(matrix[i][j])
shiftMatrix = []
for i in range(0, len(matrix)):
# Converting list to string for shifting bytes
temp = "".join(matrix[i])
# Now shifting bytes
shift_result = CircularShift(temp, i * 2)
w = []
str1 = ""
for j in range(0, len(shift_result)):
# Appending character by character to the string
str1 = str1 + shift_result[j]
if len(str1) == 2:
w.append(str1)
# Emptying the string for storing next two character
str1 = ""
shiftMatrix.append(w)
return shiftMatrix
# THIS FUNCTION COMPLETE THE TWO HEX NUMBER
def transform(hexa_number):
if len(hexa_number) == 2:
return hexa_number
else:
new_hex = "0" + hexa_number
return new_hex