def set_selector(self, index, uuid, coefficient):
assert len(uuid) == 40, "UUIDs must be 40 hex digits."
self.fd.write("k")
self.send_blob(struct.pack("<I", index))
self.send_blob(uuid.decode("hex"))
ciphertext = damgaardjurik.pack_int(self.dj.encrypt(coefficient))
self.send_blob(ciphertext)
return self.get_blob() == "1"
def process_round(self):
# Remove one block from each user's queue.
blocks = {}
for u in self.users.values():
if u.block_queue:
blocks[u.uid] = damgaardjurik.unpack_int(u.block_queue.pop(0))
print "Got %i blocks for this round." % len(blocks)
# Process the subscriptions.
for u in self.users.values():
accum = 1
for uid, base in u.selectors.items():
if uid not in blocks: continue
print "Processing %i -- %i" % (u.uid, uid)
accum *= pow(base, blocks[uid], u.modulus)
accum %= u.modulus
print "New result for %i" % u.uid
u.result_queue.append(damgaardjurik.pack_int(accum))
def send_data(self, command, datum):
if isinstance(datum, (int, long)):
datum = damgaardjurik.pack_int(datum)
self.sock.send("%s %i\n" % (command, len(datum)))
self.sock.send(datum)
