Sign a JWS with an HMAC Key from BinData

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetMacKeyBd, which sets the symmetric MAC key for a signature from the raw bytes in a BinData.

local chilkat = require("chilkat")

local jws = chilkat.Jws.new()

-- Protected header specifying HMAC-SHA256.
local header = chilkat.JsonObject.new()
header:update_string("alg", "HS256")
local success = jws:set_protected_header(0, header)
if not success then
    print(jws.last_error_text)
    return
end

local bIncludeBom = false
success = jws:set_payload("This is the content to sign.", "utf-8", bIncludeBom)
if not success then
    print(jws.last_error_text)
    return
end

-- Set the symmetric MAC key for signature 0 from the raw bytes in a BinData.  In production, obtain
-- the key material from a secure source.
local bdKey = chilkat.BinData.new()
bdKey:append_encoded("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=", "base64")
success = jws:set_mac_key_bd(0, bdKey)
if not success then
    print(jws.last_error_text)
    return
end

local jwsCompact = jws:create_jws()
if not jws.last_method_success then
    print(jws.last_error_text)
    return
end

print(jwsCompact)