Implementing an SSH server with paramiko

In the following example, we are going to use the paramiko library to implement our own SSH server by encrypting traffic with the SSH protocol. You can find the following code in the SSH_Server.py file inside the paramiko folder.

First, we review the code for the SSH server:

import socket, paramiko, threading, sys 
import getpass
if len(sys.argv) != 3: 
    print("usage SSH_Server.py <interface> <port>") 
    exit()
class SSH_Server (paramiko.ServerInterface):
    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 == 'linux') and (password == 'linux'): 
            return paramiko.AUTH_SUCCESSFUL
        return paramiko.AUTH_FAILED

The paramiko package provides a class...