Lua

Load an Encrypted Private Key from PEM Text

Demonstrates the Chilkat PrivateKey.LoadEncryptedPem method, which loads a private key from PEM text, using a password when the PEM is encrypted. The first argument is the PEM string and the second is the password. Unencrypted PEM is also accepted.

Background: An encrypted PEM protects the key material at rest — a stolen file is useless without the passphrase — which is why encrypted keys are preferred for anything shipped or stored. This loader supplies that passphrase to decrypt a BEGIN ENCRYPTED PRIVATE KEY block (and gracefully handles unencrypted PEM too), so it is a safe default when a PEM might be either. The password should come from a secure source, never a hard-coded literal.

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Lua

local chilkat = require("chilkat")

-- Demonstrates the PrivateKey.LoadEncryptedPem method, which loads a private key from PEM text.
-- The 1st argument is the PEM string and the 2nd is the password (used when the PEM is
-- encrypted).  Unencrypted PEM is also accepted.

local privKey = chilkat.PrivateKey.new()

-- The PEM text of an encrypted private key.
local pemText = "-----BEGIN ENCRYPTED PRIVATE KEY-----\nMIIFHzBJ...\n-----END ENCRYPTED PRIVATE KEY-----"

-- The key password is not hard-coded in a real application; obtain it from an interactive
-- prompt, environment variable, or a secrets vault.
local password = "myKeyPassword"

local success = privKey:load_encrypted_pem(pemText, password)
if not success then
    print(privKey.last_error_text)
    return
end

print("Loaded a " .. privKey.key_type .. " private key.")