def cipher(self, pt, key):
# Note: we assume fixed key here for huge speedup
# TODO: make this an option
#if self.ks is None:
self.ks = [keyScheduleRounds(key, 0, r) for r in range(11)]
ret = {}
Nr = 10
state = pt
ret['Plaintext'] = self.flatten(state[:])
ret['Key'] = self.flatten(self.ks[0])
state = [state[i] ^ self.ks[0][i] for i in range(16)]
ret['Round 0: AddRoundKey Output'] = self.flatten(state[:])
for r in range(1, Nr):
state = subbytes(state)
ret['Round ' + str(r) + ': SubBytes Output'] = self.flatten(state[:])
state = shiftrows(state)
ret['Round ' + str(r) + ': ShiftRows Output'] = self.flatten(state[:])
state = mixcolumns(state)
ret['Round ' + str(r) + ': MixColumns Output'] = self.flatten(state[:])
ret['Round ' + str(r) + ': RoundKey'] = self.flatten(self.ks[r])
state = [state[i] ^ self.ks[r][i] for i in range(16)]
ret['Round ' + str(r) + ': AddRoundKey Output'] = self.flatten(state[:])
state = subbytes(state)
ret['Round 10: SubBytes Output'] = self.flatten(state[:])
state = shiftrows(state)
ret['Round 10: ShiftRows Output'] = self.flatten(state[:])
ret['Round 10: RoundKey'] = self.flatten(self.ks[Nr])
state = [state[i] ^ self.ks[Nr][i] for i in range(16)]
ret['Ciphertext'] = self.flatten(state[:])
return ret
def cipher(self, pt, key):
Nr = 14
if self.ks is None:
self.ks = [keyScheduleRounds(key, 0, r) for r in range(Nr+1)]
ret = {}
state = pt
ret['Plaintext'] = self.flatten(state[:])
ret['Key (bytes 0-15)'] = self.flatten(self.ks[0])
ret['Key (bytes 16-31)'] = self.flatten(self.ks[1])
state = [state[i] ^ self.ks[0][i] for i in range(16)]
ret['Round 0: AddRoundKey Output'] = self.flatten(state[:])
for r in range(1, Nr):
state = subbytes(state)
ret['Round ' + str(r) + ': SubBytes Output'] = self.flatten(state[:])
state = shiftrows(state)
ret['Round ' + str(r) + ': ShiftRows Output'] = self.flatten(state[:])
state = mixcolumns(state)
ret['Round ' + str(r) + ': MixColumns Output'] = self.flatten(state[:])
state = [state[i] ^ self.ks[r][i] for i in range(16)]
ret['Round ' + str(r) + ': AddRoundKey Output'] = self.flatten(state[:])
state = subbytes(state)
ret['Round 14: SubBytes Output'] = self.flatten(state[:])
state = shiftrows(state)
ret['Round 14: ShiftRows Output'] = self.flatten(state[:])
state = [state[i] ^ self.ks[Nr][i] for i in range(16)]
ret['Ciphertext'] = self.flatten(state[:])
return ret
def shiftrows(self, state):
"""Helper function: performs AES shiftrows on all bytes of state"""
return shiftrows(state)
def shiftrows(self, state):
"""Helper function: performs AES shiftrows on all bytes of state"""
return shiftrows(state)