(PowerShell) Download and Trust the DigiCert Global Root CA

Demonstrates how to download a root certificate and trust it.

For more information, see https://www.digicert.com/digicert-root-certificates.htm

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# This requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# In this example, the URLs for the DigiCert root CA certs are available at this web page:
# https://www.digicert.com/digicert-root-certificates.htm

# This example downloads the "DigiCert Global Root G3"
# Valid until: 15/Jan/2038
# Serial #: 05:55:56:BC:F2:5E:A4:35:35:C3:A4:0F:D5:AB:45:72
# Thumbprint: 7E04DE896A3E666D00E687D33FFAD93BE83D349E

$certUrl = "https://dl.cacerts.digicert.com/DigiCertGlobalRootG3.crt"

$http = New-Object Chilkat.Http
$bdCert = New-Object Chilkat.BinData
$success = $http.DownloadBd($certUrl,$bdCert)
if ($success -eq $false) {
    $($http.LastErrorText)
    exit
}

# Load it into a Chilkat cert object.
$cert = New-Object Chilkat.Cert
$success = $cert.LoadFromBd($bdCert)
if ($success -eq $false) {
    $($cert.LastErrorText)
    exit
}

# Examine the common name,serial, and thumbprint:
$("CN: " + $cert.SubjectCN)
$("Serial: " + $cert.SerialNumber)
$("Thumbprint: " + $cert.Sha1Thumbprint)

# Output from the above:
# CN: DigiCert Global Root G3
# Serial: 055556BCF25EA43535C3A40FD5AB4572
# Thumbprint: 7E04DE896A3E666D00E687D33FFAD93BE83D349E

# If desired, the certificate can be saved to a local file so it does not need
# to be downloaded from the website every time.  
$certPath = "qa_data/certs/DigiCertGlobalRootG3.crt"
$success = $bdCert.WriteFile($certPath)

# To load the cert from a file...
$success = $cert.LoadFromFile($certPath)

# Do the following to add the cert to the collection of trusted roots
# for this application.  (Note:  The trust is not persisted.  Each time the
# application runs, it should load the cert (from whatever source, whether it is
# a file, a database,etc.) and do the following:
$troots = New-Object Chilkat.TrustedRoots

$troots.AddCert($cert)
$troots.Activate()

$($cert.SubjectCN + " is now trusted for this run of this application.")