Paramiko ssh connection giving lots of residue output

[basu45]

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Prerequisites

• [X] Write a descriptive title.
• [X] Make sure you are able to repro it on the latest version
• [X] Search the existing issues.

Steps to reproduce

import paramiko
client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(host=host, username=username, password=password)

channel = client.invoke_shell()
While channel.send_ready():
    channel.send('who am i\n')
While channel.rec_ready():
    Output=channel.recv(1024).decode()
Print(Output)

The issue is when we are using paramiko to connect to windows 2019 vm with invoke_shell() we are getting a lot of residue/garbage output. The output is similar to (https://stackoverflow.com/questions/61381631/read-buffer-data-continuously-running-on-remote-windows-command-prompt?noredirect=1&IQ=1)

And also the output is repeated multiple times.

Checked with bitvise ssh server it works fine with bitvise server

Tried with different version of openssh but same issue.

Any suggestions to get the clean output and non repeated/duplicate output

Expected behavior

Clean output

Actual behavior

"b'\x1b[2J\x1b[2J\x1b[1;1H\x1b[0;39;24;27;37;40mMicrosoft Windows [Version 10.0.1482] \n\x1b[2;1H(c) 2016 Microsoft Corporation. All rights reserved. \n\n\x1b[4;1Hadministrator@win C:\Users\Administrator>whoami \x1b[2J\x1b[4;54Hwhoami \x1b[4;55Hhoami \x1b[4;56Hoami \x1b[4;57Hami \x1b[4;58Hmi \x1b[4;59Hi \x1b[4;60H \x1b[5;1H' "

Error details

No response

Environment data

PSversion.                                     5.1.17763.5933
PsEdition.                                       Desktop
PSCompatibleVersions.                {1.0,2.0,30.,4.0.....}
BuildVersion.                                  10.0.17763.5993
CLRVersion.                                     4.0.30319.42000
WSManStackVersion.                      3.0
PSRemotingProtocolVersion.          2.3
Serialisation version.                          1.1.0.1

Version

OpenSSH_for_Windows_9.5p1, LibreSSL 3.8.2

Visuals

No response

[basu45]

Can anyone please help here

[basu45]

Hi @tgauth can you please look at this And help me?

[maertendMSFT]

Have you tried what is suggested on this StackOverflow: https://stackoverflow.com/questions/58063024/can-i-call-channel-invoke-shell-without-calling-channel-get-pty-beforehand

Can you try adding a -T parameter?

[basu45]

Hi @maertendMSFT , 1.We are using the paramiko libraries invoke_shell() function which internally calls the get_pty() function however if we comment the get_pty() in invoke_shell() itself on client.py of paramiko then the commands does not give any output 2. Any way we need the interactive shell as most of our framework is built to work interactively.

[basu45]

By any chance does the. https://github.com/PowerShell/Win32-OpenSSH/issues/1057 causing issues

[basu45]

Hi , any update on this issue?