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I have all my movie files on my NAS in an SMB shared folder. And i have this Python script which reads the movie filename and downloads the required subtitle from a local subtitle language website.

What i am trying to do is to port this Python3 script to Pythonista. I tried direct SMB access to NAS from Pythonista which is failed. So, I used FE File Explorer to map the SMB share and now i can access to it from the Files app. When i try to get the filename of the movie file from Files app with 'dialogs.pick_document' it tries to create a local copy of the file which takes forever because of the movie file size. What i want is to just get the filename of the movie without creating a local copy, and after downloading the subtitle file, write the .txt file to the same folder with the movie on the Files app. Is there a way to do this in Pythonista?

@febalci See here a SMB Client

This works for me, with your user, password and smb_name

from SMB_client import SMB_client

user = 'xxx'
pwd = 'xxx'
smb = SMB_client(username=user,password=pwd,smb_name='MYBOOKLIVE')
smb.connect()
tree_all = smb.getRemoteTree()
print(tree_all)

@cvp ,
That was the first thing i tried. Unfortunately i get these errors and it is not connecting:

connecting...
Error on line 64 NotReadyError SMB connection not authenticated
Connect
Error on line 88 NotReadyError SMB connection not authenticated

I tried it on Nas, windows and linux shares.

from SMB_client import SMB_client

my_smb = SMB_client(username='XXXXX',password='XXXXXX',smb_name='SERVERNAME')
print('connecting...')
my_smb.connect()
print('Connect')
tree = my_smb.getRemoteTree()
for elem in tree:
    print(elem)

#my_smb.download(path, filename)
#my_smb.upload(path, filename)
#my_smb.delete_remote_file(path, filename)
#my_smb.createRemoteDir(path)
#my_smb.removeRemoteDir(path)
#my_smb.renameRemoteFileOrDir(path, new_path)

my_smb.close()

@febalci I got the same error on my WD NAS until I set user='' to use public share, give a try please

I use a normal user to access in smb an USB key connected to my router and it works

@cvp,
One step ahead... If i use no user or a user that does not exist, i can get the root share list. But if i try to go into a directory, even a public folder, it gives an error. Funny enough, if i use an existing username, it doesn’t even gives me the share list.

from SMB_client import SMB_client

user = ''
pwd = ''
smb = SMB_client(username=user,password=pwd,smb_name='FEBSTATION')
smb.connect()
smb.getRemoteDir('dl','*')
#tree_all = smb.getRemoteTree('dl')
#print(tree_all)

ActiveBackupforBusiness
Calibre_Library
dl
docker
general
homes
music
photo
public
surveillance
Time Machine Folder
usbshare1-1
video
IPC$
web
BROTHER
Error on line 88 OperationFailure Failed to list dl on web: Unable to connect to shared device
==================== SMB Message 0 ====================
SMB Header:
-----------
Command: 0x03 (SMB2_COM_TREE_CONNECT) 
Status: 0x00000000 
Flags: 0x00 
PID: 221 
MID: 9 
TID: 0 
Data: 40 bytes 
b'09000000480020005c005c00460045004200530054004100540049004f004e005c00770065006200' 
SMB Data Packet (hex):
----------------------
b'fe534d4240000000000000000300000000000000000000000900000000000000dd00000000000000c897127c000000000000000000000000000000000000000009000000480020005c005c00460045004200530054004100540049004f004e005c00770065006200'
==================== SMB Message 1 ====================
SMB Header:
-----------
Command: 0x03 (SMB2_COM_TREE_CONNECT) 
Status: 0xC0000022 
Flags: 0x01 
PID: 221 
MID: 9 
TID: 0 
Data: 9 bytes 
b'090000000000000000' 
SMB Data Packet (hex):
----------------------
b'fe534d4240000000220000c00300010001000000000000000900000000000000dd00000000000000c897127c0000000000000000000000000000000000000000090000000000000000'

@febalci I think the problem comes from the device, not from Pythonista smb because when I use it to access an USB key connected to my router, all is ok, even the user.
But, of course, it is only an idea, not proved

@febalci try

user = ''
pwd = ''
smb = SMB_client(username=user,password=pwd,smb_name='MYBOOKLIVE')
smb.connect()
smb.service_name = 'dl'
tree = smb.getRemoteTree()
print(tree)

@cvp,

thanks for all the help. I can connect to Synology NAS now, but only through 'guest' account, that is no username or password. Also same for Windows or Linux SMB shares. For this i have to share the SMB open for all users. Still trying to find a way to connect thru an authenticated session. I keep on trying if i can make a progress i will post it here.

@febalci I wait for your solution because, I have the same problem with my Western Digital NAS but not with an USB key on my router...

Perhaps @brumm could help because he wrote the original version of the SMB client

Maybe I can check it at the weekend. Stay tuned.

@brumm Thanks. But don't sacrify your week-end 😀

user = '' works
user = 'bad user' works<==================
user = 'correct user' does not work

Mmmh, same here...
print(smb.has_authenticated) #true if empty

Authentication (with extended security) successful! #username+password empty
vs.
Authentication (with extended security) failed. Please check username and password. #username+password correct

So maybe you like to open an issue or switch to impacket???

@brumm what is strange is that I use a smb connection to a usb key connected to my router and only a correct user is accepted, thus perhaps the code is correct but needs some parameters for the nas.
In the case of the usb slot of my router, there is no free user defined.

The SMB dialect negotiation is always good, but the authentication fails in my case. Don't know if SMB signing deativated is okay... it is always deactivated with my smal travel router. So if you like you can check the base.py file and log the output.

Now i used SMBConnection from pysmb directly instead of @brumm 's SMB client. Everything is the same; can use it with guest account but could not with authenticated user. So, i tried this very same code on OSX and and on IPad Pro.

Under OSX this works perfectly without any authentication problem. However, under IPad IOS; it simply doesnt work:

import socket
from smb.SMBConnection import SMBConnection
import logging
import platform

username = 'admuser'
password = 'admpass'
server_ip = '192.168.1.20'
system_name = 'SMBSERVER'
share_name = 'general'

logging.basicConfig(filename='example.log', level=logging.DEBUG)
print (socket.gethostname())
conn = SMBConnection(username=username, password=password, my_name=socket.gethostname(), remote_name=system_name, use_ntlm_v2=True)
conn.connect(server_ip, 139)
logging.info(conn.listPath(share_name,'/'))
conn.close()

OSX:

INFO:SMB.SMBConnection:Authentication with remote machine "FEBSTATION" for user "febalci" will be using NTLM v2 authentication (with extended security)
INFO:SMB.SMBConnection:Now switching over to SMB2 protocol communication
DEBUG:SMB.SMBConnection:Received SMB2 message "SMB2_COM_NEGOTIATE" (command:0x0000 flags:0x0001)
INFO:SMB.SMBConnection:SMB2 dialect negotiation successful
DEBUG:SMB.SMBConnection:Received SMB2 message "SMB2_COM_SESSION_SETUP" (command:0x0001 flags:0x0001)
INFO:SMB.SMBConnection:Performing NTLMv2 authentication (on SMB2) with server challenge "b'7c9f209be7a4da06'"
INFO:SMB.SMBConnection:Performing NTLMv2 authentication (on SMB2) with server challenge "b'7c9f209be7a4da06'"
DEBUG:SMB.SMBConnection:NT challenge response is "b'3ccca33bd0d432f9efdc8280caf3e4870101000000000000000000000000000010af8ad0e64fc2a70000000002001400460045004200530054004100540049004f004e0001001400460045004200530054004100540049004f004e0004000200000003001400660065006200730074006100740069006f006e0007000800506d040a3fe2d40100000000'" (138 bytes)
DEBUG:SMB.SMBConnection:LM challenge response is "b'4582a0d54eb37d03d5f306266811552410af8ad0e64fc2a7'" (24 bytes)
INFO:SMB.SMBConnection:Server supports SMB signing
INFO:SMB.SMBConnection:SMB signing deactivated. SMB messages will NOT be signed.
DEBUG:SMB.SMBConnection:Received SMB2 message "SMB2_COM_SESSION_SETUP" (command:0x0001 flags:0x0009)
INFO:SMB.SMBConnection:Authentication (on SMB2) successful!
DEBUG:SMB.SMBConnection:Received SMB2 message "SMB2_COM_TREE_CONNECT" (command:0x0003 flags:0x0001)
DEBUG:SMB.SMBConnection:Received SMB2 message "SMB2_COM_CREATE" (command:0x0005 flags:0x0001)
DEBUG:SMB.SMBConnection:Received SMB2 message "SMB2_COM_QUERY_DIRECTORY" (command:0x000E flags:0x0001)
DEBUG:SMB.SMBConnection:Received SMB2 message "SMB2_COM_QUERY_DIRECTORY" (command:0x000E flags:0x0001)
DEBUG:SMB.SMBConnection:Received SMB2 message "SMB2_COM_CLOSE" (command:0x0006 flags:0x0001)
INFO:root:[, , , , , , , , , , , , , ]

IOS:

INFO:SMB.SMBConnection:Authentication with remote machine "FEBSTATION" for user "febalci" will be using NTLM v2 authentication (with extended security)
INFO:SMB.SMBConnection:Now switching over to SMB2 protocol communication
DEBUG:SMB.SMBConnection:Received SMB2 message "SMB2_COM_NEGOTIATE" (command:0x0000 flags:0x0001)
INFO:SMB.SMBConnection:SMB2 dialect negotiation successful
DEBUG:SMB.SMBConnection:Received SMB2 message "SMB2_COM_SESSION_SETUP" (command:0x0001 flags:0x0001)
INFO:SMB.SMBConnection:Performing NTLMv2 authentication (on SMB2) with server challenge "b'f0202135e4a8887e'"
INFO:SMB.SMBConnection:Performing NTLMv2 authentication (on SMB2) with server challenge "b'f0202135e4a8887e'"
DEBUG:SMB.SMBConnection:NT challenge response is "b'5592e18ef198ca1331d9e4c86e035d8d010100000000000000000000000000001bddb210e8e728520000000002001400460045004200530054004100540049004f004e0001001400460045004200530054004100540049004f004e0004000200000003001400660065006200730074006100740069006f006e00070008000e278c4f40e2d40100000000'" (138 bytes)
DEBUG:SMB.SMBConnection:LM challenge response is "b'f69c607446c5e5d044e3d694a49b3bab1bddb210e8e72852'" (24 bytes)
INFO:SMB.SMBConnection:Server supports SMB signing
INFO:SMB.SMBConnection:SMB signing deactivated. SMB messages will NOT be signed.
DEBUG:SMB.SMBConnection:Received SMB2 message "SMB2_COM_SESSION_SETUP" (command:0x0001 flags:0x0001)
INFO:SMB.SMBConnection:Authentication (on SMB2) failed. Please check username and password.

This line on OSX has flags 0x0009 whereas in IOS it is 0x0001; Like if the password is wrong. Yeah this still gives nothing, i try to use wireshark on Ipad hoping i might catch something; but Apple changed UDID structure of newer devices, so i have to wait for the new version of XCode. At least i understand that it is directly a problem on pysmb side...

@febalci I'm really sorry but I can't help, just 😢

If there's no need for python3, again, I recommend the impacket library. Here you can find a working ui example. Just make sure that impacket and ntpath.py is installed.
If you like to go further with pysmb, then you find more information in the Microsoft openspecs of SMB2 (Connecting to a Share by Using an SMB2 Negotiate, Message Syntax and SMB2 Packet Header - SYNC). Good luck!

@febalci connect with your little script to a flash drive in an usb slot of my router, log follows, hoping it could help you because I'm not enough skilled in this matter.

Edit: no error even if invalid user or invalid password, thus that does not help at all, sorry

INFO:SMB.SMBConnection:Authentication with remote machine "VOO-USB" for user "admin" will be using NTLM v2 authentication (with extended security)
DEBUG:SMB.SMBConnection:Received SMB message "SMB_COM_NEGOTIATE" (command:0x72 flags:0x88 flags2:0xC001 TID:0 UID:0)
INFO:SMB.SMBConnection:SMB dialect negotiation successful (ExtendedSecurity:False)
INFO:SMB.SMBConnection:Performing NTLMv1 authentication (without extended security) with challenge "b'11a5b2121f990f0c'" and hashed password of "b'b167b87b195510e8f49cc5dc2cf310e87497d7cc991c4908'"
DEBUG:SMB.SMBConnection:Received SMB message "SMB_COM_SESSION_SETUP_ANDX" (command:0x73 flags:0x88 flags2:0xC001 TID:0 UID:0)
DEBUG:SMB.SMBConnection:SMB uid is now 0
INFO:SMB.SMBConnection:Authentication (without extended security) successful!
DEBUG:SMB.SMBConnection:Received SMB message "SMB_COM_TREE_CONNECT_ANDX" (command:0x75 flags:0x88 flags2:0xC001 TID:0 UID:0)
INFO:SMB.SMBConnection:Authentication with remote machine "VOO-USB" for user "admin" will be using NTLM v2 authentication (with extended security)
DEBUG:SMB.SMBConnection:Received SMB message "SMB_COM_NEGOTIATE" (command:0x72 flags:0x88 flags2:0xC001 TID:0 UID:0)
INFO:SMB.SMBConnection:SMB dialect negotiation successful (ExtendedSecurity:False)
INFO:SMB.SMBConnection:Performing NTLMv1 authentication (without extended security) with challenge "b'0a5f922ce062ad4c'" and hashed password of "b'55c03ccd143e02c6cdf2ae1bae2646c8cc9b240ad99f2e40'"
DEBUG:SMB.SMBConnection:Received SMB message "SMB_COM_SESSION_SETUP_ANDX" (command:0x73 flags:0x88 flags2:0xC001 TID:0 UID:0)
DEBUG:SMB.SMBConnection:SMB uid is now 0
INFO:SMB.SMBConnection:Authentication (without extended security) successful!
DEBUG:SMB.SMBConnection:Received SMB message "SMB_COM_TREE_CONNECT_ANDX" (command:0x75 flags:0x88 flags2:0xC001 TID:0 UID:0)

As it turns out, using default interpreter as Python 2.7 in Pythonista, the above code perfectly authenticates using pysmb, whereas with Python 3.6 only on ios it does not. I am gonna open an issue on pysmb github regarding this. Thanks @cvp and @brumm for all your help...

this might not be a pysmb issue, but old modules in pythonista.
you might try in a pc first

does pysmb depend on paramiko, or openssl or anything?