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 getPartitionNum(self, trace, tnum):
key = trace.getKnownKey(tnum)
ct = trace.getTextout(tnum)
#Convert from initial key to final-round key, currently
#this assumes AES
if len(key) == 16:
rounds = 10
else:
raise ValueError("Need to implement for selected AES")
key = keyScheduleRounds(key, 0, rounds)
guess = [0] * 16
for i in range(0, 16):
st10 = ct[AES128_8bit.INVSHIFT[i]]
st9 = inv_sbox(ct[i] ^ key[i])
guess[i] = AES128_8bit.getHW(st9 ^ st10)
return guess
def getPartitionNum(self, trace, tnum):
key = trace.getKnownKey(tnum)
ct = trace.getTextout(tnum)
#Convert from initial key to final-round key, currently
#this assumes AES
if len(key) == 16:
rounds = 10
else:
raise ValueError("Need to implement for selected AES")
key = keyScheduleRounds(key, 0, rounds)
guess = [0] * 16
for i in range(0, 16):
st10 = ct[AES128_8bit.INVSHIFT[i]]
st9 = inv_sbox(ct[i] ^ key[i])
guess[i] = AES128_8bit.getHW(st9 ^ st10)
return guess
def cipher(self, input, key):
Nr = 14
#if self.ks is None:
self.ks = [keyScheduleRounds(key, 0, r) for r in range(Nr+1)]
ret = {}
state = input
ret['Ciphertext (Unflipped)'] = self.flatten(state)
ret['Key (bytes 0-15)'] = self.flatten(self.ks[0])
ret['Key (bytes 16-31)'] = self.flatten(self.ks[1])
state = self.reverse_bits(input)
ret['Ciphertext (Flipped)'] = self.flatten(state)
state = [state[i] ^ self.ks[Nr][i] for i in range(16)]
ret['Round 14: ShiftRows Output'] = self.flatten(state[:])
state = inv_shiftrows(state)
ret['Round 14: SubBytes Output'] = self.flatten(state[:])
state = inv_subbytes(state)
for r in reversed(range(1, Nr)):
ret['Round ' + str(r) + ': AddRoundKey Output'] = self.flatten(state[:])
state = [state[i] ^ self.ks[r][i] for i in range(16)]
ret['Round ' + str(r) + ': MixColumns Output'] = self.flatten(state[:])
state = inv_mixcolumns(state)
ret['Round ' + str(r) + ': ShiftRows Output'] = self.flatten(state[:])
state = inv_shiftrows(state)
ret['Round ' + str(r) + ': SubBytes Output'] = self.flatten(state[:])
state = inv_subbytes(state)
ret['Round 0: AddRoundKey Output'] = self.flatten(state[:])
state = [state[i] ^ self.ks[0][i] for i in range(16)]
ret['Plaintext'] = 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 processKnownKey(self, inpkey):
if self.model == self.LEAK_HD_LASTROUND_STATE:
return keyScheduleRounds(inpkey, 0, 10)
return inpkey
def keyScheduleRounds(self, inputkey, inputround, desiredround):
return keyScheduleRounds(inputkey, inputround, desiredround)
def keyScheduleRounds(self, inputkey, inputround, desiredround):
"""Helper function: takes AES key from one round to another round-eky """
return keyScheduleRounds(inputkey, inputround, desiredround)
def processKnownKey(self, inpkey):
return keyScheduleRounds(inpkey, 0, 10)
def processKnownKey(self, inpkey):
k = keyScheduleRounds(inpkey, 0, 10)
k = self.shiftrows(k)
return k
def keyScheduleRounds(self, inputkey, inputround, desiredround):
"""Helper function: takes AES key from one round to another round-eky """
return keyScheduleRounds(inputkey, inputround, desiredround)
def keyScheduleRounds(self, inputkey, inputround, desiredround):
return keyScheduleRounds(inputkey, inputround, desiredround)
def processKnownKey(self, inpkey):
return keyScheduleRounds(inpkey, 0, 10)