local s = crypt.base64encode("hello world")
print("enc", s, #s)
local ok, d = pcall(crypt.base64decode, s)
print("dec", ok, type(d), tostring(d), ok and #d or -1)
local e = crypt.encrypt("hello", "key")
print("e", type(e), #tostring(e), tostring(e))
print("d", tostring(crypt.decrypt(e, "key")))