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PKCS11 Certificate Chain

See more PKCS11 Examples

Demonstrates how to make CA certs available for the certificate chain to be included when creating a signature (using a PKCS11 compatible smart card / USB token) such as for PDF, XMLDSig, etc.

Note: This example requires Chilkat v9.5.0.88 or later.

PowerShell

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

$success = $false

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

# Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

$pkcs11 = New-Object Chilkat.Pkcs11

# You will use the DLL (or shared lib) provided by your smart card vendor, or a DLL compatible with your smart card.
# On Windows, if the DLL is located in C:\Windows\System32, specify only the filename.
# Otherwise provide the full path.
$pkcs11.SharedLibPath = "bit4xpki.dll"

$success = $pkcs11.Initialize()
if ($success -eq $false) {
    $($pkcs11.LastErrorText)
    exit
}

# Pass -1 for the slotID to open a session on the first non-empty slot.
$slotID = -1

# Open a session.
$readWrite = $true
$success = $pkcs11.OpenSession($slotID,$readWrite)
if ($success -eq $false) {
    $($pkcs11.LastErrorText)
    exit
}

# Make it an authenticated session by calling Login.
$userType = 1
# Make sure to use the correct PIN for your smart card..
$pin = "0000"
$success = $pkcs11.Login($userType,$pin)
if ($success -eq $false) {
    $($pkcs11.LastErrorText)
    $success = $pkcs11.CloseSession()
    exit
}

# Get the certificate (on the smart card) that has a private key.
$cert = New-Object Chilkat.Cert
$success = $pkcs11.FindCert("privateKey","",$cert)
if ($success -eq $true) {
    $("Cert with private key: " + $cert.SubjectCN)
}
else {
    $("No certificates having a private key were found.")
    $success = $pkcs11.CloseSession()
    exit
}

# If the certificates in the chain of authentication were contained on the smart card,
# then Chilkat would already have them (via the FindCert function) and the certs in the chain will be automatically used
# as needed when signing occurs.

# If you have CA certs located elsewhere, such as in .cer files, you can make them available to Chilkat in the following way:

$certVault = New-Object Chilkat.XmlCertVault
# Please review the methods available in the XML certificate vault class.  Different methods exist for adding certificates
# from various sources, such as PEM, PFX, or in-memory sources..
$success = $certVault.AddCertFile("someDir/caIntermediateCert.cer")
# ...
$success = $certVault.AddCertFile("someDir/caCert.cer")
# (Your code should check the return value to make sure it succeeded.)

$success = $cert.UseCertVault($certVault)
if ($success -eq $false) {
    $($cert.LastErrorText)
    $success = $pkcs11.CloseSession()
    exit
}

# --------------------------------------------------------------------------
# At this point, we have the cert (and certs in the chain of authentication) to be used for signing.
# The code for using the certificate in creating the digital signature, such as for a PDF, XML, etc., go here...

# --------------------------------------------------------------------------

# Revert to an unauthenticated session by calling Logout.
$success = $pkcs11.Logout()
if ($success -eq $false) {
    $($pkcs11.LastErrorText)
    $success = $pkcs11.CloseSession()
    exit
}

# When finished, close the session.
# It is important to close the session (memory leaks will occur if the session is not properly closed).
$success = $pkcs11.CloseSession()
if ($success -eq $false) {
    $($pkcs11.LastErrorText)
    exit
}

$("Success.")