Added cryptsheet to cryptpad suite!
This commit is contained in:
Caleb James DeLisle
201
www/sheet/main.js
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201
www/sheet/main.js
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define([
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'/api/config?cb=' + Math.random().toString(16).substring(2),
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'/common/messages.js',
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'/common/toolbar.js',
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'/common/chainpad.js',
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'/bower_components/jquery/dist/jquery.min.js',
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'/bower_components/tweetnacl/nacl-fast.min.js',
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'/common/otaml.js'
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], function (Config, Messages) {
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var Nacl = window.nacl;
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var $ = jQuery;
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var ChainPad = window.ChainPad;
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var Otaml = window.Otaml;
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var Toolbar = window.Toolbar;
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var module = { exports: {} };
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var parseKey = function (str) {
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var array = Nacl.util.decodeBase64(str);
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var hash = Nacl.hash(array);
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return { lookupKey: hash.subarray(32), cryptKey: hash.subarray(0,32) };
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};
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var genKey = function () {
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return Nacl.util.encodeBase64(Nacl.randomBytes(18));
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};
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var userName = function () {
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return 'Other-' + Nacl.util.encodeBase64(Nacl.randomBytes(8));
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};
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var sheetToJson = function (ifrWindow) {
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var xx = ifrWindow.sh[0].jS
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var m = [];
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for (var i = 0; i < xx.spreadsheets.length; i++) {
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m[i]=[];
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var sheet = xx.spreadsheets[i];
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for (var j = 1; j < sheet.length; j++) {
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m[i][j]=[];
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var row = sheet[j];
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for (var k = 1; k < row.length; k++) {
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var col = row[k];
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m[i][j][k] = { value: col.value, formula: col.formula };
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}
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}
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}
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return m;
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};
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var jsonToSheet = function (ifrWindow, json) {
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var xx = ifrWindow.sh[0].jS;
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for (var i = 0; i < xx.spreadsheets.length; i++) {
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var sheet = xx.spreadsheets[i];
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for (var j = 1; j < sheet.length; j++) {
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var row = sheet[j];
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for (var k = 1; k < row.length; k++) {
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var col = row[k];
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var jcol = json[i][j][k];
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if (jcol.value === col.value && jcol.formula === col.formula) { continue; }
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col.value = jcol.value;
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col.formula = jcol.formula;
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col.displayValue();
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}
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}
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}
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};
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var encryptStr = function (str, key) {
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var array = Nacl.util.decodeUTF8(str);
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var nonce = Nacl.randomBytes(24);
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var packed = Nacl.secretbox(array, nonce, key);
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if (!packed) { throw new Error(); }
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return Nacl.util.encodeBase64(nonce) + "|" + Nacl.util.encodeBase64(packed);
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};
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var decryptStr = function (str, key) {
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var arr = str.split('|');
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if (arr.length !== 2) { throw new Error(); }
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var nonce = Nacl.util.decodeBase64(arr[0]);
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var packed = Nacl.util.decodeBase64(arr[1]);
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var unpacked = Nacl.secretbox.open(packed, nonce, key);
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if (!unpacked) { throw new Error(); }
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return Nacl.util.encodeUTF8(unpacked);
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};
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// this is crap because of bencoding messages... it should go away....
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var splitMessage = function (msg, sending) {
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var idx = 0;
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var nl;
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for (var i = ((sending) ? 0 : 1); i < 3; i++) {
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nl = msg.indexOf(':',idx);
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idx = nl + Number(msg.substring(idx,nl)) + 1;
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}
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return [ msg.substring(0,idx), msg.substring(msg.indexOf(':',idx) + 1) ];
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};
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var encrypt = function (msg, key) {
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var spl = splitMessage(msg, true);
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var json = JSON.parse(spl[1]);
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// non-patches are not encrypted.
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if (json[0] !== 2) { return msg; }
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json[1] = encryptStr(JSON.stringify(json[1]), key);
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var res = JSON.stringify(json);
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return spl[0] + res.length + ':' + res;
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};
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var decrypt = function (msg, key) {
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var spl = splitMessage(msg, false);
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var json = JSON.parse(spl[1]);
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// non-patches are not encrypted.
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if (json[0] !== 2) { return msg; }
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if (typeof(json[1]) !== 'string') { throw new Error(); }
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json[1] = JSON.parse(decryptStr(json[1], key));
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var res = JSON.stringify(json);
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return spl[0] + res.length + ':' + res;
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};
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var applyChange = function(ctx, oldval, newval) {
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if (oldval === newval) return;
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var commonStart = 0;
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while (oldval.charAt(commonStart) === newval.charAt(commonStart)) {
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commonStart++;
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}
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var commonEnd = 0;
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while (oldval.charAt(oldval.length - 1 - commonEnd) === newval.charAt(newval.length - 1 - commonEnd) &&
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commonEnd + commonStart < oldval.length && commonEnd + commonStart < newval.length) {
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commonEnd++;
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}
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if (oldval.length !== commonStart + commonEnd) {
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ctx.remove(commonStart, oldval.length - commonStart - commonEnd);
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}
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if (newval.length !== commonStart + commonEnd) {
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ctx.insert(commonStart, newval.slice(commonStart, newval.length - commonEnd));
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}
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};
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$(function () {
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if (window.location.href.indexOf('#') === -1) {
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window.location.href = window.location.href + '#' + genKey();
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}
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$(window).on('hashchange', function() {
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window.location.reload();
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});
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var $sheetJson = $('#sheet-json');
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var ifrw = $('iframe')[0].contentWindow;
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var sheetEvent = function (realtime) {
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var sheetJson = JSON.stringify(sheetToJson(ifrw));
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applyChange(realtime, realtime.getUserDoc(), sheetJson);
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$sheetJson.text(sheetJson);
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};
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var eventPending = false;
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var realtimeEvent = function (realtime) {
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if (eventPending) { return; }
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eventPending = true;
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setTimeout(function () {
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eventPending = false;
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try{
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var data = window.data = realtime.getUserDoc();
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$sheetJson.text(data);
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var json = JSON.parse(data);
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jsonToSheet(ifrw, json);
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}catch(e) { console.log(e.stack); }
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}, 0);
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};
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var key = parseKey(window.location.hash.substring(1));
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var channel = Nacl.util.encodeBase64(key.lookupKey).substring(0,10);
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var myUserName = userName();
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var socket = new WebSocket(Config.websocketURL);
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socket.onopen = function () {
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var realtime = ChainPad.create(
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myUserName, 'x', channel, '', { transformFunction: Otaml.transform });
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socket.onmessage = function (evt) {
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var message = decrypt(evt.data, key.cryptKey);
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realtime.message(message);
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};
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realtime.onMessage(function (message) {
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message = encrypt(message, key.cryptKey);
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try {
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socket.send(message);
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} catch (e) {
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console.log(e.stack);
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}
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});
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ifrw.sh.on('sheetCellEdited', function () { sheetEvent(realtime); });
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sheetEvent(realtime);
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realtime.onPatch(function () { realtimeEvent(realtime); });
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ifrw.$('.jSTitle').html('');
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Toolbar(ifrw.$, ifrw.$('.jSTitle'), Messages, myUserName, realtime);
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realtime.start();
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};
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});
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});
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