Import-Pcks12Certificate.ps1

param (
    [Parameter(Mandatory)]
    [String]$Pkcs12String,

    [Parameter(Mandatory=$false)]
    [ValidateSet("CurrentUser","LocalMachine")]
    [String]$CertificateStoreLocation = "LocalMachine",

    [Parameter(Mandatory=$false)]
    [String]$CertificateStoreName = "My"
)

# Write Certificate to temporary file
$certFile = New-TemporaryFile
$Pkcs12String | Out-File $certFile.FullName

# Create certificate object
$pfx = new-object System.Security.Cryptography.X509Certificates.X509Certificate2    

# Import certificate file into certificate object
$pfx.Import($certFile.FullName, $null, "Exportable,PersistKeySet")    

# Add certificate to selected store
$store = new-object System.Security.Cryptography.X509Certificates.X509Store($CertificateStoreName,$CertificateStoreLocation)    
$store.open("MaxAllowed")    
$store.add($pfx)    
$store.close()

# Cleanup temporary file
Remove-Item $certFile
return $pfx.Thumbprint