Lua

Save a Private Key as a PKCS #8 PEM File

Demonstrates the Chilkat PrivateKey.SavePkcs8PemFile method, which saves the key as unencrypted PKCS #8 PEM (the PRIVATE KEY label) to a file. The only argument is the destination path.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: This writes the widely-compatible unencrypted .pem that most modern tooling reads — the text (Base64) form of PKCS #8. It is convenient and portable, but unprotected, so keep the file access-controlled or prefer the encrypted variant for anything that leaves a trusted location.

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Lua

local chilkat = require("chilkat")

-- Load a private key to export.
local privKey = chilkat.PrivateKey.new()
local success = privKey:load_pem_file("qa_data/private.pem")
if not success then
    print(privKey.last_error_text)
    return
end

-- Save as unencrypted PKCS #8 PEM (the "PRIVATE KEY" label).
success = privKey:save_pkcs8_pem_file("qa_output/private_pkcs8.pem")
if not success then
    print(privKey.last_error_text)
    return
end

print("Saved.")