153 lines
4.4 KiB
Python
153 lines
4.4 KiB
Python
import paramiko
|
|
import socket
|
|
import threading
|
|
import select
|
|
import sys
|
|
import os
|
|
|
|
|
|
class CustomServer(paramiko.ServerInterface):
|
|
def __init__(self, username):
|
|
self.username = username
|
|
self.event = threading.Event()
|
|
|
|
def check_auth_password(self, username, password):
|
|
# Implement proper authentication here
|
|
return paramiko.AUTH_SUCCESSFUL
|
|
if username == "user0" and password == "password0":
|
|
return paramiko.AUTH_SUCCESSFUL
|
|
elif username == "user1" and password == "password1":
|
|
return paramiko.AUTH_SUCCESSFUL
|
|
elif username == "user2" and password == "password2":
|
|
return paramiko.AUTH_SUCCESSFUL
|
|
return paramiko.AUTH_FAILED
|
|
|
|
def check_channel_request(self, kind, chanid):
|
|
if kind == "session":
|
|
return paramiko.OPEN_SUCCEEDED
|
|
return paramiko.OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED
|
|
|
|
def check_channel_pty_request(self, channel, term, width, height, pixelwidth, pixelheight, modes):
|
|
return True
|
|
|
|
def check_channel_shell_request(self, channel):
|
|
self.event.set()
|
|
return True
|
|
|
|
def check_channel_exec_request(self, channel, command):
|
|
self.event.set()
|
|
return True
|
|
|
|
|
|
def get_vm_port(username):
|
|
user_map = {
|
|
'user0': 9000,
|
|
'user1': 9001,
|
|
'emiliko': 9002
|
|
}
|
|
return user_map.get(username)
|
|
|
|
|
|
def handle_tcp_forwarding(channel, origin, destination):
|
|
try:
|
|
sock = socket.socket()
|
|
sock.connect(destination)
|
|
while True:
|
|
r, w, x = select.select([sock, channel], [], [])
|
|
if sock in r:
|
|
data = sock.recv(1024)
|
|
if len(data) == 0:
|
|
break
|
|
channel.send(data)
|
|
if channel in r:
|
|
data = channel.recv(1024)
|
|
if len(data) == 0:
|
|
break
|
|
sock.send(data)
|
|
sock.close()
|
|
channel.close()
|
|
except Exception as e:
|
|
print(f"Forwarding error: {str(e)}")
|
|
|
|
|
|
def handle_client(client_sock):
|
|
try:
|
|
transport = paramiko.Transport(client_sock)
|
|
transport.add_server_key(paramiko.Ed25519Key.from_private_key_file('daemon.key'))
|
|
|
|
server = CustomServer(None)
|
|
transport.start_server(server=server)
|
|
|
|
# Wait for authentication to complete
|
|
server.event.wait()
|
|
|
|
username = transport.get_username()
|
|
if username is None:
|
|
print("Error: No username retrieved")
|
|
return
|
|
|
|
vm_port = get_vm_port(username)
|
|
if vm_port is None:
|
|
print(f"Error: No VM associated with user {username}")
|
|
return
|
|
|
|
channel = transport.accept(20)
|
|
if channel is None:
|
|
print("Error: Channel not established")
|
|
return
|
|
|
|
vm_transport = paramiko.Transport(("localhost", vm_port))
|
|
vm_transport.start_client()
|
|
vm_transport.auth_password('root', '')
|
|
|
|
vm_channel = vm_transport.open_session()
|
|
vm_channel.get_pty()
|
|
vm_channel.invoke_shell()
|
|
|
|
while True:
|
|
r, w, x = select.select([channel, vm_channel], [], [])
|
|
if channel in r:
|
|
data = channel.recv(1024)
|
|
if len(data) == 0:
|
|
break
|
|
vm_channel.send(data)
|
|
if vm_channel in r:
|
|
data = vm_channel.recv(1024)
|
|
if len(data) == 0:
|
|
break
|
|
channel.send(data)
|
|
|
|
channel.close()
|
|
vm_channel.close()
|
|
|
|
except paramiko.SSHException as e:
|
|
print(f"SSH error: {str(e)}")
|
|
finally:
|
|
try:
|
|
transport.close()
|
|
vm_transport.close()
|
|
except:
|
|
pass
|
|
|
|
def start_server(port=22, bind_address=''):
|
|
try:
|
|
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
|
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
|
|
sock.bind((bind_address, port))
|
|
except Exception as e:
|
|
print(f"Error binding to port {port}: {str(e)}")
|
|
sys.exit(1)
|
|
|
|
while True:
|
|
try:
|
|
sock.listen(100)
|
|
print("Listening for connections...")
|
|
client, addr = sock.accept()
|
|
print(f"Got a connection from {addr}")
|
|
threading.Thread(target=handle_client, args=(client,)).start()
|
|
except Exception as e:
|
|
print(f"Error: {str(e)}")
|
|
|
|
if __name__ == '__main__':
|
|
start_server(port=2222)
|