FTPES - FTP over explicit TLS/SSL in Python

Question

I need a python client to do FTPES (explicit), does anyone has experience with any python package that can do this.

I am not able to do this in python, but can connect to FTP server using tools like FileZilla

Thanks

score 32 · Answer 1 · edited Jun 10 '22 at 07:21

32

FTP-SSL Explicit is well supported by native Python. After setting up the connection, you can use all the standard ftplib commands. More can be found at: http://docs.python.org/2/library/ftplib.html#ftplib.FTP_TLS

Here's a basic example for downloading a file:

from ftplib import FTP_TLS
ftps = FTP_TLS('ftp.MySite.com')
# login after securing control channel
ftps.login('testuser', 'testpass')           
# switch to secure data connection.. 
# IMPORTANT! Otherwise, only the user and password is encrypted and
# not all the file data.
ftps.prot_p()          
ftps.retrlines('LIST')

filename = 'remote_filename.bin'
print 'Opening local file ' + filename
with open(filename, 'wb') as myfile:
    ftps.retrbinary('RETR %s' % filename, myfile.write)

ftps.close()

edited Jun 10 '22 at 07:21

Martin Prikryl

188,800
56
490
992

answered Aug 26 '13 at 01:59

SilentSteel

2,344
1
28
28

3

However, for servers requiring reuse of TLS session in data channels, there is a need to subclass FTP_TLS, see workaround here: https://stackoverflow.com/a/43301750. – AndersTornkvist Nov 24 '18 at 09:01
3

Thanks a lot! I was receiving `ftplib.error_perm: 534 Policy requires SSL` the whole day, solved by using the `.prot_p()` to switch to secure data connection. – Kenny Aires Jun 17 '20 at 21:16

score 14 · Answer 2 · edited Oct 24 '17 at 23:34

14

For me this worked: (login after auth). Taken from Nullege. They seem to be tests for ftplib.

self.client = ftplib.FTP_TLS(timeout=10)
self.client.connect(self.server.host, self.server.port)

# enable TLS
self.client.auth()
self.client.prot_p()

self.client.login(user,pass)

edited Oct 24 '17 at 23:34

Nathan Smith

683
1
10
24

answered Nov 05 '13 at 11:58

StefanMZ

453
1
4
11

score 1 · Answer 3 · answered Nov 15 '12 at 16:33

1

Standard ftplib does contain everything you need for ftpes (ftps explicit) connection. I didn't find easy way to make implicit connections.

See: http://docs.python.org/2/library/ftplib.html#ftplib.FTP_TLS

answered Nov 15 '12 at 16:33

Sami Lehtinen

881
10
16

Mike Pennington · Answer 4 · 2022-06-10T00:18:41.007

I need a python client to do FTPES (explicit), does anyone has experience with any python package that can do this.

ftplib in stdlib should do what you want... an example, lifted from the docs...

>>> from ftplib import FTP_TLS
>>> from getpass import getpass
>>>
>>> ftpes = FTP_TLS('ftp.cisco.com', timeout=5)
>>> passwd = getpass("Enter your password:")
Enter your password:
>>> ftpes.login("username", passwd)   # login before securing channel
>>> ftpes.prot_p()          # switch to secure data connection
>>> ftpes.retrlines('LIST') # list directory content securely
total 9
drwxr-xr-x   8 root     wheel        1024 Jan  3  1994 .
drwxr-xr-x   8 root     wheel        1024 Jan  3  1994 ..
drwxr-xr-x   2 root     wheel        1024 Jan  3  1994 bin
drwxr-xr-x   2 root     wheel        1024 Jan  3  1994 etc
d-wxrwxr-x   2 ftp      wheel        1024 Sep  5 13:43 incoming
drwxr-xr-x   2 root     wheel        1024 Nov 17  1993 lib
drwxr-xr-x   6 1094     wheel        1024 Sep 13 19:07 pub
drwxr-xr-x   3 root     wheel        1024 Jan  3  1994 usr
-rw-r--r--   1 root     root          312 Aug  1  1994 welcome.msg
'226 Transfer complete.'
>>> filename = "welcome.msg"
>>> ftpes.retrbinary('RETR %s' % filename, open(filename, 'wb').write)
'226 Transfer complete.'
>>> ftpes.close()
>>>

This hangs for us with a timeout, though we're able to retrieve a listing using: curl -ssl --list_only --user USER:PASS ftp://ftp.company.com:port/public Any thoughts? — bpeikes, Jun 05 '23 at 13:37

FTPES - FTP over explicit TLS/SSL in Python

4 Answers4

Linked

Related