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Client.py
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Client.py
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from Server import AbstractEntity
from Utils import Cipher, hash_n_times
class Client(AbstractEntity):
def __init__(self, server_input_queue, server_output_queue, name, h_0, K, key, secret):
super(Client, self).__init__()
self.server_input_queue = server_input_queue
self.server_output_queue = server_output_queue
self.name = name
self.h_0 = h_0
self.K = K
self.key = key
self.secret = secret
self.successfully_finished = None
self.index = 1
def run(self):
try:
self.server_input_queue.put(self.name + ': Hi!')
self.worker_input_queue, self.worker_output_queue = self.server_output_queue.get(timeout=self.timeout)
self.worker_input_queue.put((self.name, self.prepare_encrypted_message()))
server_response = self.worker_output_queue.get(timeout=self.timeout)
if self.cipher.decrypt(server_response) == self.ok_signal:
self.index += 1
self.worker_input_queue.put(self.prepare_encrypted_polynomial_coordinates())
server_confirmation = self.worker_output_queue.get(timeout=self.timeout)
if self.is_message_valid(server_confirmation):
if self.cipher.decrypt(server_confirmation) == self.ok_signal:
self.successfully_finished = True
return
except:
pass
self.successfully_finished = False
def prepare_encrypted_message(self):
message = '{0}:{1}:{2}'.format(self.name,
self.index,
hash_n_times(self.h_0, self.K - self.index))
self.cipher = Cipher(self.key)
return self.cipher.encrypt(message)
def prepare_encrypted_polynomial_coordinates(self):
message = '{0}:{1}'.format(self.secret[0], self.secret[1])
return self.cipher.encrypt(message)