def sanityCheck2():
"""Tests multi-block DES encryption and decryption"""
try:
key = [0x0f, 0x15, 0x71, 0xc9, 0x47, 0xd9, 0xe8, 0x59]
plaintext = "The quick brown fox jumps over the lazy dog"
ciphertext = encrypt(key, plaintext)
assert decrypt(key, ciphertext) == plaintext
except AssertionError:
return False
return True
pairs = [] # for caching previous encryptions
keys = []
for i in range(0, 8):
print "sBox %d keysets:" % (i + 1)
s = set()
temp = list(pairs)
while len(s) != 1:
if len(temp) != 0:
x = temp.pop()
inp = [x[0], x[1]]
out1 = x[2]
out2 = x[3]
else:
inp = generateRandomDataPair()
out1 = pyDES.encrypt(inp[0], 3)
out2 = pyDES.encrypt(inp[1], 3)
pairs.append([inp[0], inp[1], out1, out2])
keyset = getKeySetRound3(inp[0], out1, inp[1], out2, i)
print keyset
if len(s) == 0:
s = keyset
else:
s.intersection_update(keyset)
print "intersection: %s \n" % str(s)
keys.append(s.pop())
print "original key r3: %s " % pyDES.keys[2].to01()
print "found key r3: %s " % ''.join(i for i in keys)
SOutput = pyDES.shuffle(POutput, PInverse, "Binary")
XOROutput = mapSBoxInverse(SOutput, sBoxNumber)
ExpandOutput = pyDES.expand(input[32:64])
outsBox = ExpandOutput[sBoxNumber * 6 : (sBoxNumber + 1) * 6]
keyset = set()
for i in range(0,4):
keyset.add((outsBox ^ XOROutput[i]).to01())
return keyset
keys = []
for i in range(0,8):
print "sBox %d keysets:" % (i + 1)
s = set()
while len(s) != 1:
inp = generateRandomData()
out = pyDES.encrypt(inp, 1)
keyset = getKeySet(inp, out, i)
print keyset
if len(s) == 0:
s = keyset
else:
s.intersection_update(keyset)
print "intersection: %s \n" % str(s)
keys.append(s.pop())
print "original key: %s " % pyDES.keys[0].to01()
print "found key : %s " % ''.join(i for i in keys)
outsBox = ExpandOutput[sBoxNumber * 6 : (sBoxNumber + 1) * 6]
keyset = set()
for i in range(0,4):
keyset.add((outsBox ^ XOROutput[i]).to01())
return keyset
print "Breaking round 1..\n"
keys = []
for i in range(0,8):
print "sBox %d keysets:" % (i + 1)
s = set()
while len(s) != 1:
inp = generateRandomData()
out = pyDES.encrypt(inp, 2)
keyset = getKeySetRound1(inp, out, i)
print keyset
if len(s) == 0:
s = keyset
else:
s.intersection_update(keyset)
print "intersection: %s \n" % str(s)
keys.append(s.pop())
foundkeyr1 = ''.join(i for i in keys)
print "original key r1: %s " % pyDES.keys[0].to01()
print "found key r1 : %s\n" % foundkeyr1