def run(self):
try:
client_number = self.input_queue.get(timeout=self.timeout)
if self.is_message_valid(client_number, intended_length=1):
beta = self.create_private_key()
own_number = mod_pow(self.g, beta, self.p)
self.K = mod_pow(client_number, beta, self.p)
cipher = Cipher(self.K)
self.output_queue.put(
(own_number,
self.prepare_encrypted_message(first_number=client_number,
second_number=own_number,
cipher=cipher)),
timeout=self.timeout)
client_message = self.input_queue.get(timeout=self.timeout)
if self.is_message_valid(client_message, intended_length=1):
if self.is_encrypted_message_valid(
client_number=client_number,
server_number=own_number,
encrypted_message=client_message,
cipher=cipher,
partner_id=self.client_id):
self.finished_successfully = True
return
except:
pass
self.finished_successfully = False
def run(self):
try:
alpha = self.create_private_key()
own_number = mod_pow(self.g, alpha, self.p)
self.output_queue.put(own_number, timeout=self.timeout)
message_from_server = self.input_queue.get(timeout=self.timeout)
if self.is_message_valid(message_from_server, intended_length=2):
server_number, encrypted_message = message_from_server
self.K = mod_pow(server_number, alpha, self.p)
cipher = Cipher(self.K)
if self.is_encrypted_message_valid(
client_number=own_number,
server_number=server_number,
encrypted_message=encrypted_message,
cipher=cipher,
partner_id=self.server_id):
self.output_queue.put(self.prepare_encrypted_message(
own_number, server_number, cipher),
timeout=self.timeout)
self.finished_successfully = True
return
except:
pass
self.finished_successfully = False
def run(self):
try:
client_number = self.input_queue.get(timeout=self.timeout)
if self.is_message_valid(client_number, intended_length=1):
beta = self.create_private_key()
own_number = mod_pow(self.g, beta, self.p)
self.K = mod_pow(client_number, beta, self.p)
cipher = Cipher(self.K)
self.output_queue.put((own_number,
self.prepare_encrypted_message(first_number=client_number,
second_number=own_number,
cipher=cipher)),
timeout=self.timeout)
client_message = self.input_queue.get(timeout=self.timeout)
if self.is_message_valid(client_message, intended_length=1):
if self.is_encrypted_message_valid(client_number=client_number,
server_number=own_number,
encrypted_message=client_message,
cipher=cipher,
partner_id=self.client_id):
self.finished_successfully = True
return
except:
pass
self.finished_successfully = False
def run(self):
try:
alpha = self.create_private_key()
own_number = mod_pow(self.g, alpha, self.p)
self.output_queue.put(own_number, timeout=self.timeout)
message_from_server = self.input_queue.get(timeout=self.timeout)
if self.is_message_valid(message_from_server, intended_length=2):
server_number, encrypted_message = message_from_server
self.K = mod_pow(server_number, alpha, self.p)
cipher = Cipher(self.K)
if self.is_encrypted_message_valid(client_number=own_number,
server_number=server_number,
encrypted_message=encrypted_message,
cipher=cipher,
partner_id=self.server_id):
self.output_queue.put(self.prepare_encrypted_message(own_number, server_number, cipher),
timeout=self.timeout)
self.finished_successfully = True
return
except:
pass
self.finished_successfully = False
def is_signature_valid(signed_message, expected_content, public_key, n):
try:
actual_content = mod_pow(int(signed_message), public_key, n)
return actual_content == expected_content
except:
return False
def is_signature_valid(signed_message, expected_content, public_key, n):
try:
actual_content = mod_pow(int(signed_message), public_key, n)
return actual_content == expected_content
except:
return False