Lua Requires Chilkat v11.0.0+

Download Google OAuth2 Certs (JWK) and Load into Chilkat PublicKey Objects

See more OAuth2 Examples

Demonstrates how to download the JWK from https://www.googleapis.com/oauth2/v3/certs and load the public keys into Chilkat public key objects. Lua

local chilkat = require("chilkat")

-- This example requires the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.

local http = chilkat.Http.new()

local jwkStr = http:quick_get_str("https://www.googleapis.com/oauth2/v3/certs")
if not http.last_method_success then
    print(http.last_error_text)
    return
end

-- We have the following:

--     {
--       "keys": [
--     {
--       "kid": "e8732db06287515556213b80acbcfd08cfb302a9",
--       "n": "4RIrO30287Wsq3gqXCMkUYMVAeI3H8...w2mbMNEBQ",
--       "kty": "RSA",
--       "e": "AQAB",
--       "alg": "RS256",
--       "use": "sig"
--     },
--     {
--       "kid": "8462a71da4f6d611fc0fecf0fc4ba9c37d65e6cd",
--       "e": "AQAB",
--       "n": "xT_ngLZNmT5GBtJZeTB...Ft4gK0eoFi0d3l8bcw",
--       "alg": "RS256",
--       "use": "sig",
--       "kty": "RSA"
--     }
--       ]
--     }

local json = chilkat.JsonObject.new()
local success = json:load(jwkStr)

local jsonKey = chilkat.JsonObject.new()
local pubKey = chilkat.PublicKey.new()
local numKeys = json:size_of_array("keys")
local i = 0
while i < numKeys do
    json.i = i

    json:object_of2("keys[i]", jsonKey)

    success = pubKey:load_from_string(jsonKey:emit())
    if not success then
        print(pubKey.last_error_text)
        return
    end

    print(i)
    print(pubKey:get_pem(true))
    i = i + 1
end

print("Success.")

-- Sample output:

-- 0
-- -----BEGIN RSA PUBLIC KEY-----
-- MIIBCgKCAQEA4RIrO30287Wsq3gqXCMkUYMVAeI3H8LVE6IXR1krdFeGnZLiGUPw
-- cbkeVpXf3lmJdsStOg+jijces2DZCfPyIBiQuLYfxxmAZE6ErJ0QJFg1stwli2Pz
-- 9ncYhFoqi8pXr7kEzEJBTzX4thuw56ydbGsshSEznPXoerCJOc7UI2+n0wFCWQ4Y
-- LHbh/PrWt4vdadyUUUW/QpQHXQLdD8q/Qwqdj0O9zlJE7R6Elw2E9EqnHyIGu1hm
-- LxhqrTru1M18SUhONYbVskV/BCEdVKs//X96849HorWQDCAgVMWfGsdMVq55FAdJ
-- 680N5UmQDRynIZ4+PeNGN4S9iw2mbMNEBQIDAQAB
-- -----END RSA PUBLIC KEY-----
--
-- 1
-- -----BEGIN RSA PUBLIC KEY-----
-- MIIBCgKCAQEAxT/ngLZNmT5GBdkLtJZjNeTB+8B5yWgrq/e5eMZ1hrZhcmLK+dSn
-- IkpOPV8/OekV67EnQ7I4II2rcNJnHGrGKZziXO3XN2gtUHE+mBJC99oULSbX/QwB
-- Kz7gC/IBPq9EuxTt6Oq6fPkVQ9DbRIgWJSEGBF/KRaNl3kyAlIZfpY7XgHyJTTv8
-- E7yAcYKPR+36gzdl+ps0sDLKzUuAtZNq8llK0u80z6AtAUIYwWdkEhM9upy6keKI
-- TasIxcsO7M6kZPINUSbh6t5VAm8FuqRmxpgg+9c9/GQSGd89InVypoVzWLQ+wOGg
-- 5G4H6JqIgtj0TRFt4gK0eoFi2U0d3l8bcwIDAQAB
-- -----END RSA PUBLIC KEY-----
--
-- Success.