Install certificate with PowerShell on remote server - powershell

Question

I want to install a certificate (X.509) created with makecert.exe on a remote server. I am not able to use psexec or something like that but have to use PowerShell.
Server operating system: Windows Server 2008 R2
PowerShell version: 4
Question: How to install a certificate with PowerShell on a remote server.

Answer 1

Scenario: ServerA has the SSL cert, ServerB would like the SSL cert imported
define two variables (ServerB only):
$afMachineName = "SomeMachineNameOrIp"
$certSaveLocation = "c:\temp\Cert.CER"
enable trust on both machines (ServerA & ServerB):
Function enableRemotePS() {
Enable-PSRemoting -Force
Set-Item wsman:\localhost\client\trustedhosts $afMachineName -Force
Restart-Service WinRM
}
Save the certificate (ServerB only):
Function saveCert([string]$machineName,[string]$certSaveLocation) {
Invoke-Command -ComputerName $machineName -ArgumentList $certSaveLocation -ScriptBlock {
param($certSaveLocation)
$cert = dir Cert:\LocalMachine\Root | where {$_.Subject -eq "CN=YOURCERTNAME" };
$certBytes = $cert.Export("cert");
[system.IO.file]::WriteAllBytes($certSaveLocation, $certBytes);
}
Copy-Item -Path \\$machineName\c$\temp\CertAF.CER -Destination $certSaveLocation
}
Import the certificate (ServerB only)
Function importCert([string]$certSaveLocation) {
$CertToImport = New-Object System.Security.Cryptography.X509Certificates.X509Certificate2 $certSaveLocation
$CertStoreScope = "LocalMachine"
$CertStoreName = "Root"
$CertStore = New-Object System.Security.Cryptography.X509Certificates.X509Store $CertStoreName, $CertStoreScope
# Import The Targeted Certificate Into The Specified Cert Store Name Of The Specified Cert Store Scope
$CertStore.Open([System.Security.Cryptography.X509Certificates.OpenFlags]::ReadWrite)
$CertStore.Add($CertToImport)
$CertStore.Close()
}

Answer 2

To import a PFX file you can use Import-PfxCertificate, for example
Import-PfxCertificate -FilePath YOUR_PFX_FILE.pfx -Password (ConvertTo-SecureString -String "THE_PFX_PASSWORD" -AsPlainText -Force)
To do this on a remote computer, you can use Invoke-Command -ComputerName (and use an UNC path for the PFX file).