Lua Requires Chilkat v11.0.0+

Get the Server Certificate, Certificate Chain, and Root CA Certificate

See more HTTP Examples

Demonstrates how to get the HTTP server certificate, its certificate chain, and the root CA certificate. Lua

local chilkat = require("chilkat")

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

local http = chilkat.Http.new()

-- We're getting the SSL/TLS certificate, so make sure to connect to the SSL/TLS port (443).
local sslCert = chilkat.Cert.new()
local success = http:get_server_cert("apple.com", 443, sslCert)
if not success then
    print(http.last_error_text)
    return
end

local certChain = chilkat.CertChain.new()
success = sslCert:build_cert_chain(certChain)
if not success then
    print(sslCert.last_error_text)
    return
end

local cert = chilkat.Cert.new()
local i = 0
local numCerts = certChain.num_certs
while i < numCerts do
    certChain:cert_at(i, cert)
    print("SubjectDN " .. i .. ": " .. cert.subject_dn)
    print("IssuerDN " .. i .. ": " .. cert.issuer_dn)
    i = i + 1
end

-- If the certificate chain reaches the root CA cert, then the last cert in the chain
-- is the root CA cert.
if certChain.reaches_root then
    local caCert = chilkat.Cert.new()
    certChain:cert_at(numCerts - 1, caCert)
    print("CA Root Cert: " .. caCert.subject_dn)
end