PowerShell / PowerShell/Win32-OpenSSH
Paramiko ssh connection giving lots of residue output
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Description
Prerequisites
- Write a descriptive title.
- Make sure you are able to repro it on the latest version
- 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
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the behavior through Paramiko's SSHClient, invoke_shell(), channel.send_ready(), and channel.recv_ready() against OpenSSH_for_Windows 9.5p1 on Windows Server 2019. Compare the received escape sequences and repeated characters with the expected clean output; done means identifying the source of the residue and duplication and documenting or correcting the behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- networking, operating-systems
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 30/100