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"""M2Crypto client-side FTP/TLS.
This implementation complies with draft-murray-auth-ftp-ssl-07.txt.
Example:
>>> from M2Crypto import ftpslib
>>> f = ftpslib.FTP_TLS()
>>> f.connect('', 9021)
'220 spinnaker.dyndns.org M2Crypto (Medusa) FTP/TLS server v0.07 ready.'
>>> f.auth_tls()
>>> f.set_pasv(0)
>>> f.login('ftp', 'ngps@')
'230 Ok.'
>>> f.retrlines('LIST')
-rw-rw-r-- 1 0 198 2326 Jul 3 1996 apache_pb.gif
drwxrwxr-x 7 0 198 1536 Oct 10 2000 manual
drwxrwxr-x 2 0 198 512 Oct 31 2000 modpy
drwxrwxr-x 2 0 198 512 Oct 31 2000 bobo
drwxr-xr-x 2 0 198 14336 May 28 15:54 postgresql
drwxr-xr-x 4 100 198 512 May 16 17:19 home
drwxr-xr-x 7 100 100 3584 Sep 23 2000 openacs
drwxr-xr-x 10 0 0 512 Aug 5 2000 python1.5
-rw-r--r-- 1 100 198 326 Jul 29 03:29 index.html
drwxr-xr-x 12 0 0 512 May 31 17:08 python2.1
'226 Transfer complete'
>>> f.quit()
'221 Goodbye.'
>>>
Copyright (c) 1999-2003 Ng Pheng Siong. All rights reserved."""
# Python
from ftplib import *
from ftplib import parse150, parse227
from ftplib import error_reply, error_temp, error_perm, error_proto
import socket, time
# M2Crypto
import SSL
DEFAULT_PROTOCOL='sslv23'
class FTP_TLS(FTP):
"""Python OO interface to client-side FTP/TLS."""
def __init__(self, host=None, ssl_ctx=None):
"""Initialise the client. If 'host' is supplied, connect to it."""
if ssl_ctx is not None:
self.ssl_ctx = ssl_ctx
else:
self.ssl_ctx = SSL.Context(DEFAULT_PROTOCOL)
if host:
self.connect(host)
self.prot = 0
def auth_tls(self):
"""Secure the control connection per AUTH TLS, aka AUTH TLS-C."""
self.voidcmd('AUTH TLS')
s = SSL.Connection(self.ssl_ctx, self.sock)
s.setup_ssl()
s.set_connect_state()
s.connect_ssl()
self.sock = s
self.file = self.sock.makefile()
def auth_ssl(self):
"""Secure the control connection per AUTH SSL, aka AUTH TLS-P."""
raise NotImplementedError
def prot_p(self):
"""Set up secure data connection."""
self.voidcmd('PBSZ 0')
self.voidcmd('PROT P')
self.prot = 1
def prot_c(self):
"""Set up data connection in the clear."""
self.voidcmd('PROT C')
self.prot = 0
def ntransfercmd(self, cmd, rest=None):
"""Initiate a data transfer."""
conn, size = FTP.ntransfercmd(self, cmd, rest)
if self.prot:
conn = SSL.Connection(self.ssl_ctx, conn)
conn.setup_ssl()
conn.set_connect_state()
conn.set_session(self.sock.get_session())
conn.connect_ssl()
return conn, size
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