如何将“y”传递给使用 PowerShell Start-Process 启动的 pscp 进程？

Question

I would like to pscp some files from Windows to Linux server. The following code (PowerShell) is what I was trying. It worked fine, but I need to input y , when it's trying to communicate with remote server, cause the hostname is unknown for Windows.

$proc = Start-Process powershell.exe -Credential $credential -ArgumentList "Start-Process C:\pscp.exe -Verb RunAs -ArgumentList '-i C:\prikey.ppk D:\temp\* corey@11.22.33.44:/home/corey/' -Wait" -PassThru
$proc.WaitForExit()

It will show something like this:

The server's host key is not cached in the registry. You have no guarantee that the server is the computer you think it is. The server's ssh key fingerprint is: xxxxxx If you trust this host, enter "y" to add the key to PuTTY's cache and carry on connecting...... Store key in cache? (y/n)

Is there any way to echo "y" automatically (non-interactive) while using Start-Process ? Or disable Windows's SSH host checking (even better for me)?

Any helps are appreciated.

Answer 1

Do not try to blindly answer "y" to pscp host key verification prompt. You lose a protection against man-in-the-middle attacks .

You should use the -hostkey switch with your host key fingerprint.

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A host key is part of the information you should have about any SSH server, along with the credentials. – Though as a compromise, you may want to implement an equivalent of OpenSSH accept-new mode. For an example, see WinSCP article Implementing SSH host key cache (known hosts) . – If you use "MD5" instead of "SHA-256" , you will get the fingerprint almost in the format needed for pscp .