Lua

Export a Public Key as XML

Demonstrates the Chilkat PublicKey.GetXml method, which returns the public key in Chilkat XML format. It takes no arguments; the exact representation (for example an RSAPublicKey element) depends on the key type.

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: The XML key format comes from the .NET/XML-DSIG world; exporting to it lets you hand a public key to .NET code or a system built around XML signatures. It is the inverse of LoadXml-style loading. Because a public key is not secret, this XML can be shared freely.

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Lua

local chilkat = require("chilkat")

-- Load a public key to export.  LoadFromFile inspects the content, so it accepts DER, PEM, XML,
-- JWK, and other supported representations.
local pubKey = chilkat.PublicKey.new()
local success = pubKey:load_from_file("qa_data/public.pem")
if not success then
    print(pubKey.last_error_text)
    return
end

-- Export the public key in Chilkat XML format.  The representation depends on the key type (for
-- example an RSAPublicKey element for RSA).
local xml = pubKey:get_xml()
if not pubKey.last_method_success then
    print(pubKey.last_error_text)
    return
end

print(xml)