97 lines
4.7 KiB
Python
97 lines
4.7 KiB
Python
import socket
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from threading import Thread
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from socketserver import ThreadingMixIn
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from utils.keys_manager_1 import *
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from utils.symmetric_keys_manager_1 import *
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from utils.rsa_tenamortech_utils import *
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# --- Init keys ---
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()
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def de_serialize_pub_key(public_key_pem):
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return serialization.load_pem_public_key(public_key_pem,backend=default_backend())
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# Multithreaded Python server : TCP Server Socket Thread Pool
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class ClientThread(Thread):
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def __init__(self,ip,port, private_key, public_key):
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Thread.__init__(self)
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self.ip = ip
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self.port = port
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#print(public_key_serializer(public_key))
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print("[+] New server socket thread started for " + str(ip) + ":" + str(port))
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public_key_pem = public_key_serializer(public_key)
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conn.send(public_key_pem)
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def run(self):
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got_pub_key_client = False
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able_to_retrieve_session_id = False
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while True :
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data = conn.recv(2048)
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if not got_pub_key_client: # we might receive a pub_key in clear, or an encrtpted session_id
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print("[DEBUG] Waiting for HandShake [ ... ]")
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# --- Text was clear and client sent pub_key
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if ("-----BEGIN PUBLIC KEY-----").encode('utf-8') in data:
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print("[DEBUG] Received Public Key from Client [ OK ]")
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public_key_client = de_serialize_pub_key(data)
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got_pub_key_client = True
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# --- Decrypt data and try to load session_id etc
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else:
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print("[DEBUG] No HandShake, got SessionID from Client")
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print("[DEBUG] Waiting for SessionID validation [ ... ]")
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msg = decrypt_msg(data, private_key)
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if(len(msg) == 36): # SessionID length should be 36 char.
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print("[DEBUG] SessionID format looks correct [ ~ ]")
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session_id = msg
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(symmetric_key,public_key_client) = reload_session_sym_key(session_id)
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# --- Unable to retrieve sessionID and public Key was not sent
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# --- Abort connection now
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if(symmetric_key == -1):
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print("[DEBUG] Waiting for SessionID validation [ FAIL ]")
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print("[DEBUG] Invalid SessionID, will now abort negociation [ FAIL ]")
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break
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else:
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able_to_retrieve_session_id = True
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print("[DEBUG] Waiting for SessionID validation [ OK ]")
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print("[DEBUG] SessionID is valid, symmetric_key and current Client Public key were retrieved successfully")
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print("[DEBUG] I'm all yours... [ :) ]")
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# --- SessionID that the client sent is valid, we got all the required infos
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# --- Client sent did not send sessionID but sent his public Key
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# --- Create a new session for it, (gen sessionID, create new symmetric Key, store his public key)
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if able_to_retrieve_session_id == False:
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print("[DEBUG] No existing Session, will now initiate new Session [ ... ]")
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# --- This function will create a sessionID, return a symmetric key and store the pub key
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symmetric_key = gen_sym_key_and_save(public_key_client)
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print("[DEBUG] No existing Session, will now initiate new Session [ OK ]")
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print("[DEBUG] I'm all yours... [ :) ]")
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print("Server received data:", data)
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MESSAGE = input("Multithreaded Python server : Enter Response from Server/Enter exit:").encode('utf-8')
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if MESSAGE == 'exit':
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break
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conn.send(MESSAGE) # echo
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# Multithreaded Python server : TCP Server Socket Program Stub
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TCP_IP = '0.0.0.0'
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TCP_PORT = 2004
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BUFFER_SIZE = 20 # Usually 1024, but we need quick response
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tcpServer = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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tcpServer.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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tcpServer.bind((TCP_IP, TCP_PORT))
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threads = []
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# --- Init keys ---
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(private_key, public_key) = check_for_existing_keys()
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#print(public_key_serializer(public_key))
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while True:
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tcpServer.listen(4)
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print("Multithreaded Python server : Waiting for connections from TCP clients...")
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(conn, (ip,port)) = tcpServer.accept()
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newthread = ClientThread(ip,port,private_key,public_key)
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newthread.start()
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threads.append(newthread)
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for t in threads:
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t.join()
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