88 lines
2.6 KiB
Python
88 lines
2.6 KiB
Python
#!/usr/bin/env python3
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import dataclasses
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import random
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import string
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import asyncio
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import logging
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import subprocess
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import ast
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from asyncio import StreamReader, StreamWriter
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from typing import TypeVar, Callable
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from pwn_utils import utils
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from pwn_utils.utils import read_line_safe
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log = logging.getLogger(__name__)
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clients = {} # task -> (reader, writer)
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def accept_client(client_reader: StreamReader, client_writer: StreamWriter):
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task = asyncio.Task(handle_client(client_reader, client_writer))
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clients[task] = (client_reader, client_writer)
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def client_done(task):
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del clients[task]
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client_writer.close()
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log.info('connection closed')
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task.add_done_callback(client_done)
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async def handle_client(client_reader: StreamReader, client_writer: StreamWriter):
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try:
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remote = client_writer.get_extra_info('peername')
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if remote is None:
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log.error('Could not get ip of client')
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return
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remote = '%s:%s' % (remote[0], remote[1])
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log.info('new connection from: %s' % remote)
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except Exception as e:
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log.error('EXCEPTION (get peername): %s (%s)' % (e, type(e)))
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return
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try:
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client_writer.write('Please enter username:\n'.encode())
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await client_writer.drain()
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username = await read_line_safe(client_reader)
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if username != 'admin':
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client_writer.write('Invalid username\n'.encode())
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await client_writer.drain()
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return
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client_writer.write('Please enter password:\n'.encode())
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await client_writer.drain()
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password = await read_line_safe(client_reader)
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if password != 'password':
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client_writer.write('Invalid password\n'.encode())
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await client_writer.drain()
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return
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client_writer.write('Welcome admin\n'.encode())
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await client_writer.drain()
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flag = subprocess.check_output('flag')
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client_writer.write(flag)
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await client_writer.drain()
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except Exception as e:
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utils.log_error(e, client_writer)
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def main():
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# start server
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loop = asyncio.get_event_loop()
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f = asyncio.start_server(accept_client, host=None, port=20001)
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log.info('Server waiting for connections')
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loop.run_until_complete(f)
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loop.run_forever()
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if __name__ == '__main__':
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logging.basicConfig(
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level=logging.INFO,
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format='%(asctime)s %(levelname)s [%(module)s:%(lineno)d] %(message)s',
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)
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# "INFO:asyncio:poll took 25.960 seconds" is annyoing
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logging.getLogger('asyncio').setLevel(logging.WARNING)
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main()
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