Lua Requires Chilkat v11.0.0+

Load JWK into PublicKey Object

See more JSON Web Signatures (JWS) Examples

Demonstrates how to load a Java Web Key (JWK) into a Chilkat public key object. Lua

local chilkat = require("chilkat")

-- Imagine we have this JWK:

-- {
-- "kty":"RSA",
-- "kid":"bilbo.baggins@hobbiton.example",
-- "use":"sig",
-- "n":"26381066103266289976070039679240841999340706859156341823971393693544846472963839705790075117105560154606562987481050889935247188300178764426769543782451174831475924241862817098997865881169498995546309260357488285676768114714548754913374731868063116787903918383610614912211576698081222844057810710088656983077876282582286966085572172471849443305250452393766960762340311496052418952315081937000716222751229644449475751932222180738210988190709824209639002026650048655399108647971010890335494074025258268035713167380057822555485524738518699437692145859633592396626258745090144803752145540471688039673495588314804430463791",
-- "e":"65537"
-- }
--

local sbJwk = chilkat.StringBuilder.new()
local success = sbJwk:load_file("qa_data/jwk/simple_jwk_rsa.json", "utf-8")
if not success then
    print("Failed to load simple JWK file.")
    return
end

-- Loading it into a Chilkat public key object is easy:
local pubkey = chilkat.PublicKey.new()
success = pubkey:load_from_string(sbJwk:get_as_string())
if not success then
    print(pubkey.last_error_text)
    return
end

print("Simple JWK loaded into public key object.")

-- ----------------------------------------------------------------------------------------------------------
-- Demonstrate how to load a JWK that is contained within JSON into a public key object.

-- {
--   "alg":"RS256",
--   "jwk":  {
--           "kty":"RSA",
--           "kid":"bilbo.baggins@hobbiton.example",
--           "use":"sig",
--           "n":"26381066103266289976070039679240841999340706859156341823971393693544846472963839705790075117105560154606562987481050889935247188300178764426769543782451174831475924241862817098997865881169498995546309260357488285676768114714548754913374731868063116787903918383610614912211576698081222844057810710088656983077876282582286966085572172471849443305250452393766960762340311496052418952315081937000716222751229644449475751932222180738210988190709824209639002026650048655399108647971010890335494074025258268035713167380057822555485524738518699437692145859633592396626258745090144803752145540471688039673495588314804430463791",
--           "e":"65537"
--           }
-- }

local sbJwk2 = chilkat.StringBuilder.new()
success = sbJwk2:load_file("qa_data/jwk/contained_jwk_rsa.json", "utf-8")
if not success then
    print(sbJwk2.last_error_text)
    return
end

-- Get the "jwk" part of the JSON..
local json = chilkat.JsonObject.new()
json:load(sbJwk2:get_as_string())

local jsonJwk = chilkat.JsonObject.new()
success = json:object_of2("jwk", jsonJwk)
if not success then
    print(json.last_error_text)
    return
end

local pubkey2 = chilkat.PublicKey.new()
success = pubkey2:load_from_string(jsonJwk:emit())
if not success then
    print(pubkey2.last_error_text)
    return
end

print("Contained JWK loaded into public key object.")