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@dbuades
Last active July 2, 2022 18:10
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# @manojampalam - authored initial script
# @friism - Fixed issue with invalid SDDL on Set-Acl
# @manojampalam - removed ntrights.exe dependency
# @bingbing8 - removed secedit.exe dependency
$scriptpath = $MyInvocation.MyCommand.Path
$scriptdir = Split-Path $scriptpath
$sshdpath = Join-Path $scriptdir "sshd.exe"
$sshagentpath = Join-Path $scriptdir "ssh-agent.exe"
$etwman = Join-Path $scriptdir "openssh-events.man"
if (-not (Test-Path $sshdpath)) {
throw "sshd.exe is not present in script path"
}
if (Get-Service sshd -ErrorAction SilentlyContinue)
{
Stop-Service sshd
sc.exe delete sshd 1>$null
}
if (Get-Service ssh-agent -ErrorAction SilentlyContinue)
{
Stop-Service ssh-agent
sc.exe delete ssh-agent 1>$null
}
# unregister etw provider
wevtutil um `"$etwman`"
# adjust provider resource path in instrumentation manifest
[XML]$xml = Get-Content $etwman
$xml.instrumentationManifest.instrumentation.events.provider.resourceFileName = $sshagentpath.ToString()
$xml.instrumentationManifest.instrumentation.events.provider.messageFileName = $sshagentpath.ToString()
$streamWriter = $null
$xmlWriter = $null
try {
$streamWriter = new-object System.IO.StreamWriter($etwman)
$xmlWriter = [System.Xml.XmlWriter]::Create($streamWriter)
$xml.Save($xmlWriter)
}
finally {
if($streamWriter) {
$streamWriter.Close()
}
}
#register etw provider
wevtutil im `"$etwman`"
$agentDesc = "Agent to hold private keys used for public key authentication."
New-Service -Name ssh-agent -DisplayName "OpenSSH Authentication Agent" -BinaryPathName `"$sshagentpath`" -Description $agentDesc -StartupType Manual | Out-Null
sc.exe sdset ssh-agent "D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)(A;;RP;;;AU)"
sc.exe privs ssh-agent SeImpersonatePrivilege
## We comment out these lines in order to only install ssh-agent
# $sshdDesc = "SSH protocol based service to provide secure encrypted communications between two untrusted hosts over an insecure network."
# New-Service -Name sshd -DisplayName "OpenSSH SSH Server" -BinaryPathName `"$sshdpath`" -Description $sshdDesc -StartupType Manual | Out-Null
# sc.exe privs sshd SeAssignPrimaryTokenPrivilege/SeTcbPrivilege/SeBackupPrivilege/SeRestorePrivilege/SeImpersonatePrivilege
Write-Host -ForegroundColor Green "ssh-agent service successfully installed"
@Nesegreven
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Thank you for this, solved my issue.

@dbuades
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dbuades commented Apr 3, 2020

Thank you for this, solved my issue.

You are welcome, happy it helped!

@medizinmensch
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Just found your comment and this gist. Thanks! It worked!

@dbuades
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dbuades commented Jul 16, 2020

Just found your comment and this gist. Thanks! It worked!

Nice! Happy to help 👍

@RDelorier
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Thank you @dbuades solved my issue as well.

@dbuades
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dbuades commented Sep 30, 2020

Thank you @dbuades solved my issue as well.

Glad it was useful !

@CaseyKAllDay
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this helped me as well, much appreciated!!

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