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#!/usr/bin/env python3

# -*- coding: utf-8 -*-

"""

Created on Mon Jun 22 22:07:38 2020

@author: edoardottt

"""

import socket

import paramiko

import threading

import sys

# using the key from the Paramiko demo files

host_key = paramiko.RSAKey(filename="test_rsa.key")

class Server(paramiko.ServerInterface):

def __init__(self):

self.event = threading.Event()

def check_channel_request(self, kind, chanid):

if kind == "session":

return paramiko.OPEN_SUCCEEDED

return paramiko.OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED

def check_auth_password(self, username, password):

if username == "justin" and password == "lovesthepython":

return paramiko.AUTH_SUCCESSFUL

return paramiko.AUTH_FAILED

server = sys.argv[1]

ssh_port = int(sys.argv[2])

try:

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

sock.bind((server, ssh_port))

sock.listen(100)

print("[+] Listening for connection...")

client, addr = sock.accept()

except Exception as e:

print("[-] Listen failed: " + str(e))

sys.exit(1)

print("[+] Got a connection!")

try:

bhSession = paramiko.Transport(client)

bhSession.add_server_key(host_key)

server = Server()

try:

bhSession.start_server(server=server)

except paramiko.SSHException as x:

print("[-] Negotiation failed.")

chan = bhSession.accept(20)

print("[+] Authenticated!")

print(chan.recv(1024))

chan.send("Welcome to bh_ssh!")

while True:

try:

command = input("Enter command: ").strip("\n")

if command != "exit":

chan.send(command)

print(chan.recv(1024) + "\n")

else:

chan.send("exit")

print("exiting")

bhSession.close()

raise Exception("exit")

except Exception as e:

print("[-] Caught exception: " + str(e))

try:

bhSession.close()

except:

pass

sys.exit(1)

except:

pass