PowerShell :: Create a Self-Signed Certificate On Local Machine and Export it to PFX and CRT.

Make-Cert.ps1

$subject = 'automationname.domain.ca'
$certFileName = $subject -replace '\.','_'
$certPass = ConvertTo-SecureString 'AutomationCertificate!1' -AsPlainText -Force

# Create a self-signed certificate in the local machine personal certificate store and store the result in the $cert variable.
$cert = New-SelfSignedCertificate -Subject $subject
# Display the new certificate properties
$cert | Format-List -Property *

# Save the certificate (with private key) into a PFX file, and just the public key into a CRT file.
[String] $certPath = Join-Path -Path 'cert:\LocalMachine\My\' -ChildPath $cert.Thumbprint
Export-PfxCertificate -Cert $certPath -FilePath ('{0}.pfx' -f $certFileName) -Password $certPass
Export-Certificate -Cert $certPath -FilePath ('{0}.crt' -f $certFileName)