Lua Requires Chilkat v11.0.0+

Generate an RSA Key and Save to Encrypted PEM

See more RSA Examples

Demonstrates how to generate an RSA key and save to an encrypted PEM file. Lua

local chilkat = require("chilkat")

local rsa = chilkat.Rsa.new()

-- Generate a 2048-bit key.
local privKey = chilkat.PrivateKey.new()
local success = rsa:gen_key(2048, privKey)
if not success then
    print(rsa.last_error_text)
    return
end

local password = "secret"
-- Saving to a relative path (from the current working directory of the process).
local path = "rsaKeys/myTestRsaPrivate.pem"
-- Encrypt the PEM using 256-bit AES encryption.
privKey.pkcs8_encrypt_alg = "aes256"
success = privKey:save_pkcs8_encrypted_pem_file(password, path)
if not success then
    print(privKey.last_error_text)
    return
end

-- 

-- We can also save the public key.
-- There is no need to encrypt public keys.
local pubKey = chilkat.PublicKey.new()
privKey:to_public_key(pubKey)

path = "rsaKeys/myTestRsaPublic.pem"
-- Choose PKCS1 or PKCS8
-- We'll choose PKCS8.
local preferPkcs1 = false
success = pubKey:save_pem_file(preferPkcs1, path)
if not success then
    print(pubKey.last_error_text)
    return
end

-- 

print("Success.")