var graphene = require("graphene-pk11");
var Module = graphene.Module;

var lib = "/opt/local/lib/softhsm/libsofthsm2.so";

var mod = Module.load(lib, "SoftHSM");
var SessionFlag = graphene.SessionFlag;
var UserType = graphene.UserType;

mod.initialize();

var slot = mod.getSlots(2);
if (slot.flags & graphene.SlotFlag.TOKEN_PRESENT) {
    var session = slot.open(SessionFlag.SERIAL_SESSION | SessionFlag.RW_SESSION);
    session.login("8888",UserType.USER);

    // enc algorithm
    var alg = {
        name: "AES_CBC_PAD",
        params: new Buffer([1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6]) // IV
    };

    // generate AES key
    var key = session.generateKey(graphene.KeyGenMechanism.AES, {
        "class": graphene.ObjectClass.SECRET_KEY,
        "token": false,
        "valueLen": 256 / 8,
        "keyType": graphene.KeyType.AES,
        "encrypt": true,
        "decrypt": true
    });

    var MESSAGE = "helloworld";

    var enc = new Buffer(0);

    // encrypting
    var enc = session.createCipher(alg, key).once(MESSAGE, new Buffer((MESSAGE.length >> 3 << 3) + 16));
    console.log("Enc:", enc);
    console.log("Enc:", enc.toString("hex"));           // Enc: eb21e15b896f728a4...


    session.logout();
    session.close();
}
else {
    console.error("Slot is not initialized");
}

mod.finalize();