def verify_cipher_mix(cipher_mix, teller=_teller, nr_parallel=0):
try:
p = cipher_mix['modulus']
g = cipher_mix['generator']
q = cipher_mix['order']
y = cipher_mix['public']
original_ciphers = cipher_mix['original_ciphers']
mixed_ciphers = cipher_mix['mixed_ciphers']
challenge = cipher_mix['challenge']
cipher_collections = cipher_mix['cipher_collections']
offset_collections = cipher_mix['offset_collections']
random_collections = cipher_mix['random_collections']
except KeyError as e:
m = "Invalid cipher mix format"
raise ZeusError(m, e)
if compute_mix_challenge(cipher_mix) != challenge:
m = "Invalid challenge"
raise ZeusError(m)
nr_ciphers = len(original_ciphers)
nr_rounds = len(cipher_collections)
teller.task('Verifying mixing of %d ciphers for %d rounds' %
(nr_ciphers, nr_rounds))
if (len(offset_collections) != nr_rounds
or len(random_collections) != nr_rounds):
m = "Invalid cipher mix format: collections not of the same size!"
raise ZeusError(m)
#if not validate_cryptosystem(p, g, q, teller):
# m = "Invalid cryptosystem"
# raise AssertionError(m)
total = nr_rounds * nr_ciphers
with teller.task('Verifying ciphers', total=total):
data = []
for i, bit in zip(range(nr_rounds), bit_iterator(int(challenge, 16))):
ciphers = cipher_collections[i]
randoms = random_collections[i]
offsets = offset_collections[i]
data.append((p, g, q, y, i, bit, original_ciphers, mixed_ciphers,
ciphers, randoms, offsets))
if nr_parallel <= 0:
for args in data:
verify_mix_round(*args, teller=teller)
else:
pool = Pool(nr_parallel, Random.atfork)
try:
for count in pool.imap(_verify_mix_round, data):
teller.advance(count)
finally:
pool.terminate()
pool.join()
teller.finish('Verifying mixing')
return 1
def verify_cipher_mix(cipher_mix, teller=_teller, nr_parallel=0):
try:
p = cipher_mix['modulus']
g = cipher_mix['generator']
q = cipher_mix['order']
y = cipher_mix['public']
original_ciphers = cipher_mix['original_ciphers']
mixed_ciphers = cipher_mix['mixed_ciphers']
challenge = cipher_mix['challenge']
cipher_collections = cipher_mix['cipher_collections']
offset_collections = cipher_mix['offset_collections']
random_collections = cipher_mix['random_collections']
except KeyError, e:
m = "Invalid cipher mix format"
raise ZeusError(m, e)
def _validate_candidates(self):
candidates = self.do_get_candidates()
nr_candidates = len(candidates)
if len(set(candidates)) != nr_candidates:
m = "Duplicate candidates!"
raise ZeusError(m)
def validate_creating(self):
questions = map(lambda q: q['question'], self.poll.questions_data)
if len(questions) != len(set(questions)):
raise ZeusError("Duplicate questions.")
return super(ZeusDjangoElection, self).validate_creating()
q = cipher_mix['order']
y = cipher_mix['public']
original_ciphers = cipher_mix['original_ciphers']
mixed_ciphers = cipher_mix['mixed_ciphers']
challenge = cipher_mix['challenge']
cipher_collections = cipher_mix['cipher_collections']
offset_collections = cipher_mix['offset_collections']
random_collections = cipher_mix['random_collections']
except KeyError, e:
m = "Invalid cipher mix format"
raise ZeusError(m, e)
if compute_mix_challenge(cipher_mix) != challenge:
m = "Invalid challenge"
raise ZeusError(m)
nr_ciphers = len(original_ciphers)
nr_rounds = len(cipher_collections)
teller.task('Verifying mixing of %d ciphers for %d rounds'
% (nr_ciphers, nr_rounds))
if (len(offset_collections) != nr_rounds or
len(random_collections) != nr_rounds):
m = "Invalid cipher mix format: collections not of the same size!"
raise ZeusError(m)
#if not validate_cryptosystem(p, g, q, teller):
# m = "Invalid cryptosystem"
# raise AssertionError(m)