sftp_server.py

import socket
import threading
from StringIO import StringIO
import paramiko

HOST, PORT = 'localhost', 2222
HOSTKEY = """
-----BEGIN EC PRIVATE KEY-----
MHcCAQEEINnMNKzog0Cbnun+EKuFu4kcpc0iKJALw5LkC1E1x+9EoAoGCCqGSM49
AwEHoUQDQgAEt11fabDR77CPL/1OUfayQ/m3C1uRI/039pBmYagk4zQ4Mxwow6L6
UkKHL9pHHO3aWdUulY9OU88mT7O8Lg5hyA==
-----END EC PRIVATE KEY-----
"""


class AllAccessServer(paramiko.ServerInterface):
    def check_auth_none(self, username):
        return paramiko.AUTH_SUCCESSFUL

    def check_auth_password(self, username, password):
        return paramiko.AUTH_SUCCESSFUL

    def check_auth_publickey(self, username, key):
        return paramiko.AUTH_SUCCESSFUL

    def check_channel_request(self, kind, chanid):
        return paramiko.OPEN_SUCCEEDED


def start_server(host, port):
    hostkey = paramiko.ECDSAKey.from_private_key(StringIO(HOSTKEY))
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
    server_socket.bind((host, port))
    server_socket.listen(10)

    while True:
        conn, address = server_socket.accept()

        transport = paramiko.Transport(conn)
        transport.load_server_moduli()
        transport.add_server_key(hostkey)
        transport.set_subsystem_handler("sftp", paramiko.SFTPServer, paramiko.SFTPServerInterface)
        transport.start_server(server=AllAccessServer(), event=threading.Event())


if __name__ == '__main__':
    start_server(HOST, PORT)