125 lines
3.7 KiB
Python
125 lines
3.7 KiB
Python
from cryptography.fernet import Fernet
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import platform
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import threading
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import requests
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import time
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import rsa
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import os
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OS = "Windows"
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if "Linux" in str(platform.platform()):
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OS = "Linux"
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class Client:
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def _key_gen(self) -> None:
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(pubkey, privkey) = rsa.newkeys(512)
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with open("private.pem", "wb") as f:
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f.write(privkey.save_pkcs1())
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with open("public.pem", "wb") as f:
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f.write(pubkey.save_pkcs1())
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def __init__(self, username: str):
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self.server = input("server ip: \n")
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self.port = input("server port: \n")
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self.username = username
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self.base_url = f"http://{self.server}:{self.port}"
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self.talk_url = f"{self.base_url}/talk"
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self.info_url = f"{self.base_url}/update"
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self.key_url = f"{self.base_url}/get_key"
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self.pubkey = None
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self.privkey = None
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self.symetric_key = None
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self.fernet = None
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def send_info(self):
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while True:
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user_input = input("You're message: ")
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message = f'{self.username}: {user_input}'
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requests.post(self.talk_url, data={
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"text": self.fernet.encrypt(message.encode()),
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"username": self.username
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})
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def update_info(self):
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last_try = None
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while True:
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time.sleep(0.05)
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r = requests.post(self.info_url)
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if last_try == r.json():
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continue
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last_try = r.json()
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# For windows clear command its cls
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# For linux clear command its clear
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if OS == "Linux":
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os.system("clear")
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else:
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os.system("cls")
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if len(last_try['status']) > 0:
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for i, msg in enumerate(last_try["status"]):
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actual_message = self.fernet.decrypt(msg.encode()).decode("utf-8")
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if i == 0:
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users = last_try["users_in_chat"]
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print(f"Users in chat: {users}\n\n")
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print(f"{actual_message}\n")
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else:
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print(f"{actual_message}\n")
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def _key_request(self) -> None:
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with open('private.pem', 'rb') as f:
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self.privkey = rsa.PrivateKey.load_pkcs1(f.read())
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with open("public.pem", 'rb') as f:
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r = requests.get(
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self.key_url,
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data={
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"pubkey": f.read(),
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"username": self.username
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},
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stream=True
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)
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message = r.raw.read(999)
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self.symetric_key = rsa.decrypt(message, self.privkey)
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self.fernet = Fernet(self.symetric_key)
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def _remove_keys(self) -> None:
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os.remove("private.pem")
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os.remove("public.pem")
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def _validate_keys(self) -> None:
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self._key_gen()
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self._key_request()
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with open('public.pem', "rb") as f:
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first_key = f.read()
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self.pubkey = rsa.PublicKey.load_pkcs1(first_key)
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self._remove_keys()
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def __call__(self):
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# Running two threads,
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# One for sending info
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# Second one for updating info
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self._validate_keys()
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threads = [
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threading.Thread(target=self.send_info),
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threading.Thread(target=self.update_info)
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]
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for th in threads:
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th.start()
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if __name__ == '__main__':
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c = Client(input("Who are you? \t"))
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c()
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