Create a JWS

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.CreateJws, which creates and returns a JWS from the current payload, headers, and signing key.

local chilkat = require("chilkat")

local jws = chilkat.Jws.new()

-- Set the protected header for signer 0, specifying the signature algorithm (alg).
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

-- Set the payload to be signed.
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

-- Provide the HMAC key (base64) for signer 0.  In production, obtain the key from a secure source
-- rather than hard-coding it.
local base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
success = jws:set_mac_key(0, base64Key, "base64")
if not success then
    print(jws.last_error_text)
    return
end

-- Create the JWS from the current payload, headers, and signing key.  The returned string is the
-- JWS (compact serialization by default).
local jwsCompact = jws:create_jws()
if not jws.last_method_success then
    print(jws.last_error_text)
    return
end

print(jwsCompact)