Install OpenSSH Server on Windows

install-openssh-server-windows.ps1

# credits: https://www.medo64.com/2019/12/authorized-keys-in-windows-10-openssh/
# Start as admin
If (-NOT ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) {   
    $arguments = "& '" + $myinvocation.mycommand.definition + "'"
    Start-Process powershell -Verb runAs -ArgumentList $arguments
    Break
}

# OpenSSH: Install
Add-WindowsCapability -Online -Name OpenSSH.Server~~~~0.0.1.0
Set-Service -Name sshd -StartupType Automatic
Start-Service sshd

# OpenSSH: Authorized Keys Setup
New-Item -Path $Env:ALLUSERSPROFILE\ssh -Name "administrators_authorized_keys" -ItemType "file" `
  -Value "<INSERT_PUBLIC_KEY_HERE>"

# Set-up file ACL/permissions
icacls "$Env:ALLUSERSPROFILE\ssh\administrators_authorized_keys" /inheritance:d
icacls "$Env:ALLUSERSPROFILE\ssh\administrators_authorized_keys" /remove `
    "NT AUTHORITY\Authenticated Users"

New-ItemProperty -Path "HKLM:\SOFTWARE\OpenSSH" -Name DefaultShell -Value "C:\Program Files\PowerShell\7\pwsh.exe" -PropertyType String -Force

Restart-Service -Name sshd