Creates a self signed certificate, exports its public and private keys to the file system, and deletes it from the certificate store

new-certificate-export-public-private-keys.ps1

# Variables to edit
$certificateSubjectName = "certificateSubjectName"
$certificatePath = "certificatePath"
$certificatePassword = "certificatePassword"

# Creates the self signed certificate
$certificate = New-SelfSignedCertificate -DnsName $certificateSubjectName -CertStoreLocation "cert:\CurrentUser\My" `
   -NotAfter (Get-Date).AddYears(10) -FriendlyName $certificateSubjectName
if ($null -ne $certificate) {
    # Exports the certificate's public key
    Export-Certificate -Cert $certificate -FilePath (Join-Path -Path $certificatePath -ChildPath "$certificateSubjectName.cer") -Type CERT
    # Exports the certificate's private key
    $mypwd = ConvertTo-SecureString -String $certificatePassword -Force -AsPlainText
    Get-ChildItem -Path "cert:\CurrentUser\my\$($certificate.Thumbprint)" | Export-PfxCertificate -FilePath (Join-Path -Path $certificatePath -ChildPath "$certificateSubjectName.pfx") -Password $mypwd
    # Removes the certificate from the store
    Remove-Item "cert:\CurrentUser\my\$($certificate.Thumbprint)"
}