Lua

Load EC Public Key from X,Y Values

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Demonstrates how to load an EC public key from X and Y values. Lua

local chilkat = require("chilkat")

-- We have the following x and y values in base64 (for an EC point on the P-256 curve).
local x = "Dn7uB1O7kgk74G6qfQwFJESeDnxO6lLjGZFWZJE16tw"
local y = "iOWA5DInzK6nuUGvHJbMVq1Dpj248FqSV2teN3HzmhU"

-- Build a JWK that looks like this:

-- {
--   "kty": "EC",
--   "crv": "P-256",
--   "x": "Dn7uB1O7kgk74G6qfQwFJESeDnxO6lLjGZFWZJE16tw",
--   "y": "iOWA5DInzK6nuUGvHJbMVq1Dpj248FqSV2teN3HzmhU"
-- }

local json = chilkat.JsonObject.new()
json:update_string("kty", "EC")
json:update_string("crv", "P-256")
json:update_string("x", x)
json:update_string("y", y)

-- Load from the JWK.
local pubkey = chilkat.PublicKey.new()
local success = pubkey:load_from_string(json:emit())
if not success then
    print(pubkey.last_error_text)
    return
end

print("Success.")