verify/jade.html at main · bcgame-project/verify · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Jade verify</title>
    <link rel="stylesheet" href="./lib/main.css" />
    <link rel="stylesheet" href="./lib/bootstrap/css/bootstrap.min.css" />
    <script src="./lib/GoogleAnalytics.js"></script>
    <script src="./lib/vue.min.js"></script>
    <script src="./lib/crypto-js.js"></script>
    <script src="./lib/tools.js"></script>
    <script src="./lib/utils.js"></script>
</head>

<body>
    <div id="app" class="main">
        <h1 class="text-center pb-5">Jade verify</h1>
        <hr />
        <form class="py-5">
            <h2 class="text-center">Input</h2>
            <div class="form-group">
                <input :value="server_seed" @change="server_seed = $event.target.value" class="form-control"
                    placeholder="Server Seed" />
            </div>
            <div class="form-group">
                <input :value="client_seed" @change="client_seed = $event.target.value" class="form-control"
                    placeholder="Client Seed" />
            </div>
            <div class="form-group">
                <input :value="nonce" @change="nonce = $event.target.value" class="form-control" placeholder="Nonce" />
            </div>
        </form>
        <hr />
        <form class="py-5">
            <h2 class="text-center pb-5">Output</h2>
            <div class="form-group">
                <label>sha256(server_seed)</label>
                <input class="form-control" readonly
                    :value="CryptoJS.SHA256(CryptoJS.enc.Utf8.parse(server_seed)).toString()" />
            </div>
            <div class="form-group">
                <label>hmac_sha256(client_seed:nonce, server_seed)</label>
                <input class="form-control" readonly :value="result_hash" />
            </div>
        </form>
        <hr />
        <form class="py-5">
            <h2 class="text-center pb-5">Final Result</h2>
            <span>{{ resultList }}</span>
        </form>
    </div>
</body>
<script>
    let qs = tools.queryString();
    var app = new Vue({
        el: "#app",
        data: {
            /** inputs */
            client_seed: qs.c || "",
            server_seed: qs.s || "",
            nonce: parseInt(qs.n) || 0,
        },
        computed: {
            result_hash() {
                return CryptoJS.HmacSHA256(
                    this.client_seed + ":" + this.nonce,
                    this.server_seed
                );
            },

            result_hash_list() {
                return String(this.result_hash);
            },

            sha256ServerSeed() {
                return CryptoJS.SHA256(CryptoJS.enc.Utf8.parse(this.server_seed)).toString();
            },

            hmacSha256Result() {
                return CryptoJS.HmacSHA256(
                    `${this.client_seed}:${this.nonce}`,
                    this.server_seed
                ).toString();
            },

            resultList() {
                return this.getResult(this.server_seed, this.client_seed, this.nonce);
            },
        },
        watch: {
            "this.gameResult"() {
                ga("send", "event", "Color", "verify", this.server_seed, {
                    metric0: this.client_seed,
                    metric1: this.nonce,
                });
            },
        },
        methods: {
            getResult(serverSeed, clientSeed, nonce) {
                const BASE_RANGE = 1000000;

                const key = `${clientSeed}:${nonce}`;
                const hash = this.hmacSHA256(key, serverSeed);
                return Math.floor(slideWindowNumber(hash, BASE_RANGE));
            },

            hmacSHA256(key, seed) {
                const res = CryptoJS.HmacSHA256(key, seed).toString(CryptoJS.enc.Hex);
                return res;
            },

            slideWindowNumber(hash, events) {
                const index = parseInt(hash.substring(0, 15), 16) % 47;
                return this.calNumberFromIndex(hash, index, events);
            },

            calNumberFromIndex(hash, beginIndex, events) {
                const MAX_BORDER = 1.0 / Math.pow(2, 53);
                const safeIndex = Math.min(hash.length - 14, beginIndex);
                const num = parseInt(hash.substring(safeIndex, safeIndex + 14), 16) >> 3;
                const normalized = num * MAX_BORDER;
                return Math.floor(normalized * events);
            }

        },
    });
</script>

</html>