Lua Requires Chilkat v10.1.2+

Secure FTP with Client Certificate

See more FTP Examples

Chilkat FTP2 provides the ability to use a client certificate with secure FTP (implicit or explicit SSL/TLS). This example demonstrates how to load a certificate from a .pfx and use it as the client-side SSL cert. Note: Client-side certificates are only needed in situations where the server demands one. Lua

local chilkat = require("chilkat")

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

local ftp = chilkat.Ftp2.new()

ftp.hostname = "ftp.example.com"
ftp.port = 21
ftp.username = "test"
ftp.password = "test"

-- This example will use explict TLS/SSL.
-- Establish an explicit secure channel after connection
-- on the standard FTP port 21.
ftp.auth_tls = true

-- The Ssl property is for establishing an implicit SSL connection
-- on port 990.  Because this example uses explicit SSL, it
-- should remain false.
ftp.ssl = false

-- Load a certificate from a .pfx
-- A PFX may contain several certs, including the certificates
-- in a chain of authority.
local certStore = chilkat.CertStore.new()
local password = "***"
-- Load the certs from a PFX into an in-memory certificate store:
local success = certStore:load_pfx_file("chilkat.pfx", password)
if not success then
    print(certStore.last_error_text)
    return
end

-- Find the desired certificate.
local jsonCN = chilkat.JsonObject.new()
jsonCN:update_string("CN", "cert common name")

local cert = chilkat.Cert.new()
success = certStore:find_cert(jsonCN, cert)
if not success then
    print("Certificate not found!")
    return
end

-- Use this certificate for our secure (SSL/TLS) connection:
success = ftp:set_ssl_client_cert(cert)

-- Connect and login to the FTP server.  The connection is
-- made secure because of the AuthTls setting.
success = ftp:connect()
if not success then
    print(ftp.last_error_text)
    return
else
    -- LastErrorText contains information even when
    -- successful. This allows you to visually verify
    -- that the secure connection actually occurred.
    print(ftp.last_error_text)
end

print("Secure FTP Channel Established!")

-- Do whatever you're doing to do ...
-- upload files, download files, etc...

-- .....
-- .....

success = ftp:disconnect()