Lua Requires Chilkat v11.0.0+

Export a Certificate's Private Key to Various Formats

See more Certificates Examples

Loads a digital certificate and private key from a PFX file (also known as PKCS#12) and exports the private key to various formats: (1) PKCS8 Encrypted, (2) PKCS8 Encrypted PEM, (3) PKCS8 unencrypted, (4) PKCS8 PEM unencrypted, (5) RSA DER unencrypted, (6) RSA PEM unencrypted, (7) XML. Lua

local chilkat = require("chilkat")

local cert = chilkat.Cert.new()

-- Load from the PFX file
local pfxFilename = "/Users/chilkat/testData/pfx/chilkat_ssl_pwd_is_test.pfx"
local pfxPassword = "test"

-- A PFX typically contains certificates in the chain of authentication.
-- The Chilkat cert object will choose the certificate w/
-- private key farthest from the root authority cert.
-- To access all the certificates in a PFX, use the
-- Chilkat certificate store object instead.
local success = cert:load_pfx_file(pfxFilename, pfxPassword)
if not success then
    print(cert.last_error_text)
    return
end

-- Get the private key...
local privKey = chilkat.PrivateKey.new()
success = cert:get_private_key(privKey)
if not success then
    print(cert.last_error_text)
    return
end

-- Export to various formats:

local password = "secret"

-- PKCS8 Encrypted DER
local path = "/Users/chilkat/testData/privkeys/chilkat_pkcs8_enc.der"
success = privKey:save_pkcs8_encrypted_file(password, path)
if not success then
    print(privKey.last_error_text)
    return
end

-- PKCS8 Encrypted PEM
path = "/Users/chilkat/testData/privkeys/chilkat_pkcs8_enc.pem"
success = privKey:save_pkcs8_encrypted_pem_file(password, path)
if not success then
    print(privKey.last_error_text)
    return
end

-- PKCS8 Unencrypted DER
path = "/Users/chilkat/testData/privkeys/chilkat_pkcs8.der"
success = privKey:save_pkcs8_file(path)
if not success then
    print(privKey.last_error_text)
    return
end

-- PKCS8 Unencrypted PEM
path = "/Users/chilkat/testData/privkeys/chilkat_pkcs8.pem"
success = privKey:save_pkcs8_pem_file(path)
if not success then
    print(privKey.last_error_text)
    return
end

--  RSA DER (unencrypted)
path = "/Users/chilkat/testData/privkeys/chilkat_rsa.der"
success = privKey:save_pkcs1_file(path)
if not success then
    print(privKey.last_error_text)
    return
end

-- RSA PEM (unencrypted)
path = "/Users/chilkat/testData/privkeys/chilkat_rsa.pem"
success = privKey:save_pem_file(path)
if not success then
    print(privKey.last_error_text)
    return
end

-- XML (unencrypted)
path = "/Users/chilkat/testData/privkeys/chilkat.xml"
success = privKey:save_xml_file(path)
if not success then
    print(privKey.last_error_text)
    return
end

print("Private key exported to various formats.")