def generateRandomDataPair(sBoxNo):
global pairsNeeded
data1 = bitarray()
data2 = bitarray()
binary = bitarray(pyDES.hex_to_binary(inputs[sBoxNo][0]))
for item in binary:
x = bitarray(str(random.randrange(0,2)))
data1.extend(x)
y = bitarray("0") if not item else bitarray("1")
data2.extend(x ^ y)
binary = bitarray(pyDES.hex_to_binary(inputs[sBoxNo][1]))
for item in binary:
x = bitarray(str(random.randrange(0,2)))
data1.extend(x)
y = bitarray("0") if not item else bitarray("1")
data2.extend(x ^ y)
pairsNeeded += 1
return [bitarray(data1), bitarray(data2)]
def getKeySetRound5(o1, o2, sNo):
POutputXor = o1[32:64] ^ o2[32:64] ^ bitarray(pyDES.hex_to_binary(inputs[sNo][0]))
SOutputXor = pyDES.shuffle(POutputXor, PInverse, "Binary")
SOutputXorInt = int(SOutputXor[sNo * 4 : (sNo + 1) * 4].to01(), 2)
ExpandOutput1 = pyDES.expand(o1[0:32])
ExpandOutput2 = pyDES.expand(o2[0:32])
SInputXor = ExpandOutput1 ^ ExpandOutput2
SInputXorInt = int(SInputXor[sNo * 6 : (sNo + 1) * 6].to01(), 2)
pairs = XORProfile[str(sNo)][str(SInputXorInt)][str(SOutputXorInt)][0]
keyset = set()
for item in pairs:
possibleKey = item[0] ^ int(ExpandOutput1[sNo * 6 : (sNo + 1) * 6].to01(), 2)
keyset.add(possibleKey)
return keyset