Lua

Download and Trust the DigiCert Global Root CA

See more Certificates Examples

Demonstrates how to download a root certificate and trust it. Lua

local chilkat = require("chilkat")

-- 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

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

local http = chilkat.Http.new()
local bdCert = chilkat.BinData.new()
local success = http:download_bd(certUrl, bdCert)
if not success then
    print(http.last_error_text)
    return
end

-- Load it into a Chilkat cert object.
local cert = chilkat.Cert.new()
success = cert:load_from_bd(bdCert)
if not success then
    print(cert.last_error_text)
    return
end

-- Examine the common name,serial, and thumbprint:
print("CN: " .. cert.subject_cn)
print("Serial: " .. cert.serial_number)
print("Thumbprint: " .. cert.sha1_thumbprint)

-- 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.
local certPath = "qa_data/certs/DigiCertGlobalRootG3.crt"
success = bdCert:write_file(certPath)

-- To load the cert from a file...
success = cert:load_from_file(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:
local troots = chilkat.TrustedRoots.new()

troots:add_cert(cert)
troots:activate()

print(cert.subject_cn .. " is now trusted for this run of this application.")