Lua Requires Chilkat v9.5.0.88+

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. Lua

local chilkat = require("chilkat")

-- 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.

local pkcs11 = chilkat.Pkcs11.new()

-- 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.shared_lib_path = "bit4xpki.dll"

local success = pkcs11:initialize()
if not success then
    print(pkcs11.last_error_text)
    return
end

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

-- Open a session.
local readWrite = true
success = pkcs11:open_session(slotID, readWrite)
if not success then
    print(pkcs11.last_error_text)
    return
end

-- Make it an authenticated session by calling Login.
local userType = 1
-- Make sure to use the correct PIN for your smart card..
local pin = "0000"
success = pkcs11:login(userType, pin)
if not success then
    print(pkcs11.last_error_text)
    success = pkcs11:close_session()
    return
end

-- Get the certificate (on the smart card) that has a private key.
local cert = chilkat.Cert.new()
success = pkcs11:find_cert("privateKey", "", cert)
if success then
    print("Cert with private key: " .. cert.subject_cn)
else
    print("No certificates having a private key were found.")
    success = pkcs11:close_session()
    return
end

-- 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:

local certVault = chilkat.XmlCertVault.new()
-- 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:add_cert_file("someDir/caIntermediateCert.cer")
-- ...
success = certVault:add_cert_file("someDir/caCert.cer")
-- (Your code should check the return value to make sure it succeeded.)

success = cert:use_cert_vault(certVault)
if not success then
    print(cert.last_error_text)
    success = pkcs11:close_session()
    return
end

-- --------------------------------------------------------------------------
-- 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 not success then
    print(pkcs11.last_error_text)
    success = pkcs11:close_session()
    return
end

-- 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:close_session()
if not success then
    print(pkcs11.last_error_text)
    return
end

print("Success.")