def encrypt(_, rt, key):
start = time.time()
print "Started at %f." % start
aes = AES(rt, options.keylength, use_exponentiation=options.exponentiation)
ciphertext = []
for i in range(options.count):
ciphertext += aes.encrypt("a" * 16, key, True,
prepare_at_once=options.at_once)
opened_ciphertext = [rt.open(c) for c in ciphertext]
def fin(ciphertext):
print "Finished after %f sec." % (time.time() - start)
print "Ciphertext:", [hex(c.value) for c in ciphertext]
if rt._needed_data and options.preproc:
print "Missing pre-processed data:"
for (func, args), pcs in rt._needed_data.iteritems():
print "* %s%s:" % (func, args)
print " " + pformat(pcs).replace("\n", "\n ")
if rt._pool:
print "Unused pre-processed data:"
pcs = rt._pool.keys()
pcs.sort()
print " " + pformat(pcs).replace("\n", "\n ")
rt.shutdown()
g = gather_shares(opened_ciphertext)
rt.schedule_complex_callback(g, fin)
def test_key_expansion(self, runtime):
aes = AES(runtime, 256, quiet=True)
key = []
ascii_key = []
for i in xrange(8):
key.append([])
for j in xrange(4):
b = 15 * i + j
key[i].append(Share(runtime, GF256, GF256(b)))
ascii_key.append(chr(b))
result = aes.key_expansion(key)
r = rijndael(ascii_key)
expected_result = []
for round_key in r.Ke:
for word in round_key:
split_word = []
expected_result.append(split_word)
for j in xrange(4):
split_word.insert(0, word % 256)
word /= 256
self.verify(runtime, result, expected_result)
def test_encrypt(self, runtime):
cleartext = "Encrypt this!!!!"
key = "Supposed to be secret!?!"
aes = AES(runtime, 192, quiet=True)
r = rijndael(key)
result = aes.encrypt(cleartext, key)
expected = [ord(c) for c in r.encrypt(cleartext)]
return self.verify(runtime, [result], [expected])
def invert(rt):
aes = AES(rt, 192, use_exponentiation=options.exponentiation)
bytes = [
Share(rt, GF256, GF256(random.randint(0, 255)))
for i in range(options.count)
]
start = time.time()
done = gather_shares([aes.invert(byte) for byte in bytes])
def finish(_):
duration = time.time() - start
print "Finished after %.3f s." % duration
print "Time per inversion: %.3f ms" % (1000 * duration / options.count)
rt.shutdown()
done.addCallback(finish)
def test_byte_sub_with_exponentiation(self, runtime):
self._test_byte_sub(
runtime, AES(runtime, 128, use_exponentiation=True, quiet=True))