From b2ad2742803bf1d790f0b7090836b230473bbc00 Mon Sep 17 00:00:00 2001
From: randogoth <kflux@posteo.de>
Date: Sun, 21 May 2023 16:38:57 +0300
Subject: [PATCH] diy

---
 web/nfc-theme/static/geo.js | 140 +++++++++++-------------------------
 1 file changed, 40 insertions(+), 100 deletions(-)

diff --git a/web/nfc-theme/static/geo.js b/web/nfc-theme/static/geo.js
index 61668c6..d85bc83 100644
--- a/web/nfc-theme/static/geo.js
+++ b/web/nfc-theme/static/geo.js
@@ -21,7 +21,7 @@ if ( hasharray.length > 0 ) {
 
 // fingerprint user
 
-const cyrb53 = function (str, seed = 0) {
+function cyrb53(str, seed = 0){
     let h1 = 0xdeadbeef ^ seed, h2 = 0x41c6ce57 ^ seed;
     for (let i = 0, ch; i < str.length; i++) {
         ch = str.charCodeAt(i);
@@ -33,87 +33,36 @@ const cyrb53 = function (str, seed = 0) {
     return 4294967296 * (2097151 & h2) + (h1 >>> 0);
 };
 
-const generateTheAudioFingerPrint = function () {
-    var context = null;
-    var currentTime = null;
-    var oscillator = null;
-    var compressor = null;
-    var fingerprint = null;
-    var callback = null;
-    function run(debug = false) {
-        try {
-            setup();
-            oscillator.connect(compressor);
-            compressor.connect(context.destination);
-            oscillator.start(0);
-            context.startRendering();
-            context.oncomplete = onComplete;
-        }
-        catch (e) {
-            if (debug) {
-                throw e;
-            }
-        }
+function audioFingerprint() {
+    const AudioContext = window.OfflineAudioContext || window.webkitOfflineAudioContex;
+    const context = new AudioContext(1, 5000, 44100);
+    const oscillator = context.createOscillator();
+    oscillator.type = "triangle";
+    oscillator.frequency.value = 1000;
+    const compressor = context.createDynamicsCompressor()
+    compressor.threshold.value = -50;
+    compressor.knee.value = 40;
+    compressor.ratio.value = 12;
+    compressor.reduction.value = 20;
+    compressor.attack.value = 0;
+    compressor.release.value = 0.2;
+    oscillator.connect(compressor);
+    compressor.connect(context.destination);
+    oscillator.start()
+    context.oncomplete = event => {
+    const samples = event.renderedBuffer.getChannelData(0)};
+    context.startRendering();
+    let hash = 0;
+    for (let i = 0; i < samples.length; ++i) {
+        hash += Math.abs(samples[i]);
     }
-    function setup() {
-        setContext();
-        currentTime = context.currentTime;
-        setOscillator();
-        setCompressor();
-    }
-    function setContext() {
-        var audioContext = window.OfflineAudioContext || window.webkitOfflineAudioContext;
-        context = new audioContext(1, 44100, 44100);
-    }
-    function setOscillator() {
-        oscillator = context.createOscillator();
-        oscillator.type = "triangle";
-        oscillator.frequency.setValueAtTime(10000, currentTime);
-    }
-    function setCompressor() {
-        compressor = context.createDynamicsCompressor();
-        setCompressorValueIfDefined('threshold', -50);
-        setCompressorValueIfDefined('knee', 40);
-        setCompressorValueIfDefined('ratio', 12);
-        setCompressorValueIfDefined('reduction', -20);
-        setCompressorValueIfDefined('attack', 0);
-        setCompressorValueIfDefined('release', .25);
-    }
-    function setCompressorValueIfDefined(item, value) {
-        if (compressor[item] !== undefined && typeof compressor[item].setValueAtTime === 'function') {
-            compressor[item].setValueAtTime(value, context.currentTime);
-        }
-    }
-    function onComplete(event) {
-        generateFingerprints(event);
-        compressor.disconnect();
-    }
-    function generateFingerprints(event) {
-        var output = null;
-        for (var i = 4500; 5e3 > i; i++) {
-            var channelData = event.renderedBuffer.getChannelData(0)[i];
-            output += Math.abs(channelData);
-        }
-        fingerprint = output.toString();
-        if (typeof callback === 'function') {
-            return callback(fingerprint);
-        }
-    }
-    return {
-        run: run
-    };
-};
+    return hash;
+}
 
-const getCanvasFingerprint = () => {
-    // If canvas is not supported simply return a static string
-    if (!(0, exports.isCanvasSupported)())
-        return "broprint.js";
-    // draw a canvas of given text and return its data uri
-    // different browser generates different dataUri based on their hardware configs
+function canvasFingerprint() {
     var canvas = document.createElement('canvas');
     var ctx = canvas.getContext('2d');
-    // https://www.browserleaks.com/canvas#how-does-it-work
-    var txt = 'BroPrint.65@345876';
+    var txt = 'Numinous Field Communication';
     ctx.textBaseline = "top";
     ctx.font = "14px 'Arial'";
     ctx.textBaseline = "alphabetic";
@@ -123,29 +72,20 @@ const getCanvasFingerprint = () => {
     ctx.fillText(txt, 2, 15);
     ctx.fillStyle = "rgba(102, 204, 0, 0.7)";
     ctx.fillText(txt, 4, 17);
-    return canvas.toDataURL();
+    src = canvas.toDataURL();
+    for (i = 0; i < src.length; i++) {
+        char = src.charCodeAt(i);
+        hash = ((hash<<5)-hash)+char;
+        hash = hash & hash;
+    }
+    return hash;
 };
 
-function getCurrentBrowserFingerPrint() {
-    const getTheAudioPrints = new Promise((resolve, reject) => {
-        generateTheAudioFingerPrint.run(function (fingerprint) {
-            resolve(fingerprint);
-        });
-    });
-    const DevicePrints = new Promise((resolve, reject) => {
-        getTheAudioPrints.then((audioChannelResult) => {
-            let fingerprint = window.btoa(audioChannelResult) + (0, getCanvasFingerprint)();
-            resolve((0, cyrb53)(fingerprint, 0));
-        }).catch(() => {
-            try {
-                resolve((0, cyrb53)((0, getCanvasFingerprint)()).toString());
-            }
-            catch (error) {
-                reject("Failed to generate the finger print of this browser");
-            }
-        });
-    });
-    return DevicePrints;
+function getFingerprint() {
+    const audioFp = audioFingerprint();
+    const canvasFp = canvasFingerprint();
+    const hash = cyrb53(audioFp + canvasFp);
+    return hash;
 };
 
-console.log(getCurrentBrowserFingerPrint());
\ No newline at end of file
+console.log(getFingerprint());
\ No newline at end of file