Пример #1
0
    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
Пример #2
0
    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
Пример #3
0
    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
Пример #4
0
    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
Пример #5
0
 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
Пример #6
0
 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