Lua

Load a Public Key from Base64 DER

Demonstrates the Chilkat PublicKey.LoadBase64 method, which loads a public key from standard Base64-encoded DER. The only argument is the Base64 string; whitespace within it is permitted.

Background: A public key in DER (binary) form is often carried as Base64 text so it can travel through channels that expect a string — a config value, a JSON field, a certificate export. This loader decodes that text and inspects the DER to determine the key type and structure automatically. It is the plain-Base64 counterpart to loading a full PEM block, which additionally has the BEGIN/END armor.

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Lua

local chilkat = require("chilkat")

-- Demonstrates the PublicKey.LoadBase64 method, which loads a public key from standard
-- Base64-encoded DER.  The only argument is the Base64 string (whitespace is allowed).

local pubKey = chilkat.PublicKey.new()

-- The Base64 of the DER-encoded public key.
local keyStr = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA...IDAQAB"

local success = pubKey:load_base64(keyStr)
if not success then
    print(pubKey.last_error_text)
    return
end

print("Loaded a " .. pubKey.key_type .. " public key.")