src/js/index.js

   1 (function() {
   2
   3     // mnemonics is populated as required by getLanguage
   4     var mnemonics = { "english": new Mnemonic("english") };
   5     var mnemonic = mnemonics["english"];
   6     var seed = null;
   7     var bip32RootKey = null;
   8     var bip32ExtendedKey = null;
   9     var network = bitcoin.networks.bitcoin;
  10     var addressRowTemplate = $("#address-row-template");
  11
  12     var showIndex = true;
  13     var showAddress = true;
  14     var showPubKey = true;
  15     var showPrivKey = true;
  16     var showQr = false;
  17
  18     var entropyChangeTimeoutEvent = null;
  19     var phraseChangeTimeoutEvent = null;
  20     var rootKeyChangedTimeoutEvent = null;
  21
  22     var generationProcesses = [];
  23
  24     var DOM = {};
  25     DOM.network = $(".network");
  26     DOM.bip32Client = $("#bip32-client");
  27     DOM.phraseNetwork = $("#network-phrase");
  28     DOM.useEntropy = $(".use-entropy");
  29     DOM.entropyContainer = $(".entropy-container");
  30     DOM.entropy = $(".entropy");
  31     DOM.entropyFiltered = DOM.entropyContainer.find(".filtered");
  32     DOM.entropyType = DOM.entropyContainer.find(".type");
  33     DOM.entropyStrength = DOM.entropyContainer.find(".strength");
  34     DOM.entropyEventCount = DOM.entropyContainer.find(".event-count");
  35     DOM.entropyBits = DOM.entropyContainer.find(".bits");
  36     DOM.entropyBitsPerEvent = DOM.entropyContainer.find(".bits-per-event");
  37     DOM.entropyWordCount = DOM.entropyContainer.find(".word-count");
  38     DOM.entropyBinary = DOM.entropyContainer.find(".binary");
  39     DOM.entropyMnemonicLength = DOM.entropyContainer.find(".mnemonic-length");
  40     DOM.phrase = $(".phrase");
  41     DOM.passphrase = $(".passphrase");
  42     DOM.generateContainer = $(".generate-container");
  43     DOM.generate = $(".generate");
  44     DOM.seed = $(".seed");
  45     DOM.rootKey = $(".root-key");
  46     DOM.extendedPrivKey = $(".extended-priv-key");
  47     DOM.extendedPubKey = $(".extended-pub-key");
  48     DOM.bip32tab = $("#bip32-tab");
  49     DOM.bip44tab = $("#bip44-tab");
  50     DOM.bip32panel = $("#bip32");
  51     DOM.bip44panel = $("#bip44");
  52     DOM.bip32path = $("#bip32-path");
  53     DOM.bip44path = $("#bip44-path");
  54     DOM.bip44purpose = $("#bip44 .purpose");
  55     DOM.bip44coin = $("#bip44 .coin");
  56     DOM.bip44account = $("#bip44 .account");
  57     DOM.bip44accountXprv = $("#bip44 .account-xprv");
  58     DOM.bip44accountXpub = $("#bip44 .account-xpub");
  59     DOM.bip44change = $("#bip44 .change");
  60     DOM.generatedStrength = $(".generate-container .strength");
  61     DOM.hardenedAddresses = $(".hardened-addresses");
  62     DOM.addresses = $(".addresses");
  63     DOM.rowsToAdd = $(".rows-to-add");
  64     DOM.more = $(".more");
  65     DOM.feedback = $(".feedback");
  66     DOM.tab = $(".derivation-type a");
  67     DOM.indexToggle = $(".index-toggle");
  68     DOM.addressToggle = $(".address-toggle");
  69     DOM.publicKeyToggle = $(".public-key-toggle");
  70     DOM.privateKeyToggle = $(".private-key-toggle");
  71     DOM.languages = $(".languages a");
  72     DOM.qrContainer = $(".qr-container");
  73     DOM.qrHider = DOM.qrContainer.find(".qr-hider");
  74     DOM.qrImage = DOM.qrContainer.find(".qr-image");
  75     DOM.qrHint = DOM.qrContainer.find(".qr-hint");
  76     DOM.showQrEls = $("[data-show-qr]");
  77
  78     function init() {
  79         // Events
  80         DOM.network.on("change", networkChanged);
  81         DOM.bip32Client.on("change", bip32ClientChanged);
  82         DOM.useEntropy.on("change", setEntropyVisibility);
  83         DOM.entropy.on("input", delayedEntropyChanged);
  84         DOM.entropyMnemonicLength.on("change", entropyChanged);
  85         DOM.phrase.on("input", delayedPhraseChanged);
  86         DOM.passphrase.on("input", delayedPhraseChanged);
  87         DOM.generate.on("click", generateClicked);
  88         DOM.more.on("click", showMore);
  89         DOM.rootKey.on("input", delayedRootKeyChanged);
  90         DOM.bip32path.on("input", calcForDerivationPath);
  91         DOM.bip44purpose.on("input", calcForDerivationPath);
  92         DOM.bip44coin.on("input", calcForDerivationPath);
  93         DOM.bip44account.on("input", calcForDerivationPath);
  94         DOM.bip44change.on("input", calcForDerivationPath);
  95         DOM.tab.on("shown.bs.tab", calcForDerivationPath);
  96         DOM.hardenedAddresses.on("change", calcForDerivationPath);
  97         DOM.indexToggle.on("click", toggleIndexes);
  98         DOM.addressToggle.on("click", toggleAddresses);
  99         DOM.publicKeyToggle.on("click", togglePublicKeys);
 100         DOM.privateKeyToggle.on("click", togglePrivateKeys);
 101         DOM.languages.on("click", languageChanged);
 102         setQrEvents(DOM.showQrEls);
 103         disableForms();
 104         hidePending();
 105         hideValidationError();
 106         populateNetworkSelect();
 107         populateClientSelect();
 108     }
 109
 110     // Event handlers
 111
 112     function networkChanged(e) {
 113         var networkIndex = e.target.value;
 114         networks[networkIndex].onSelect();
 115         if (seed != null) {
 116             phraseChanged();
 117         }
 118         else {
 119             rootKeyChanged();
 120         }
 121     }
 122
 123     function bip32ClientChanged(e) {
 124         var clientIndex = DOM.bip32Client.val();
 125         if (clientIndex == "custom") {
 126             DOM.bip32path.prop("readonly", false);
 127         }
 128         else {
 129             DOM.bip32path.prop("readonly", true);
 130             clients[clientIndex].onSelect();
 131             if (seed != null) {
 132                 phraseChanged();
 133             }
 134             else {
 135                 rootKeyChanged();
 136             }
 137         }
 138     }
 139
 140     function setEntropyVisibility() {
 141         if (isUsingOwnEntropy()) {
 142             DOM.entropyContainer.removeClass("hidden");
 143             DOM.generateContainer.addClass("hidden");
 144             DOM.phrase.prop("readonly", true);
 145             DOM.entropy.focus();
 146             entropyChanged();
 147         }
 148         else {
 149             DOM.entropyContainer.addClass("hidden");
 150             DOM.generateContainer.removeClass("hidden");
 151             DOM.phrase.prop("readonly", false);
 152             hidePending();
 153         }
 154     }
 155
 156     function delayedPhraseChanged() {
 157         hideValidationError();
 158         showPending();
 159         if (phraseChangeTimeoutEvent != null) {
 160             clearTimeout(phraseChangeTimeoutEvent);
 161         }
 162         phraseChangeTimeoutEvent = setTimeout(phraseChanged, 400);
 163     }
 164
 165     function phraseChanged() {
 166         showPending();
 167         hideValidationError();
 168         setMnemonicLanguage();
 169         // Get the mnemonic phrase
 170         var phrase = DOM.phrase.val();
 171         var errorText = findPhraseErrors(phrase);
 172         if (errorText) {
 173             showValidationError(errorText);
 174             return;
 175         }
 176         // Calculate and display
 177         var passphrase = DOM.passphrase.val();
 178         calcBip32RootKeyFromSeed(phrase, passphrase);
 179         calcForDerivationPath();
 180         hidePending();
 181     }
 182
 183     function delayedEntropyChanged() {
 184         hideValidationError();
 185         showPending();
 186         if (entropyChangeTimeoutEvent != null) {
 187             clearTimeout(entropyChangeTimeoutEvent);
 188         }
 189         entropyChangeTimeoutEvent = setTimeout(entropyChanged, 400);
 190     }
 191
 192     function entropyChanged() {
 193         // If blank entropy, clear mnemonic, addresses, errors
 194         if (DOM.entropy.val().trim().length == 0) {
 195             clearDisplay();
 196             clearEntropyFeedback();
 197             DOM.phrase.val("");
 198             showValidationError("Blank entropy");
 199             return;
 200         }
 201         // Get the current phrase to detect changes
 202         var phrase = DOM.phrase.val();
 203         // Set the phrase from the entropy
 204         setMnemonicFromEntropy();
 205         // Recalc addresses if the phrase has changed
 206         var newPhrase = DOM.phrase.val();
 207         if (newPhrase != phrase) {
 208             if (newPhrase.length == 0) {
 209                 clearDisplay();
 210             }
 211             else {
 212                 phraseChanged();
 213             }
 214         }
 215         else {
 216             hidePending();
 217         }
 218     }
 219
 220     function delayedRootKeyChanged() {
 221         // Warn if there is an existing mnemonic or passphrase.
 222         if (DOM.phrase.val().length > 0 || DOM.passphrase.val().length > 0) {
 223             if (!confirm("This will clear existing mnemonic and passphrase")) {
 224                 DOM.rootKey.val(bip32RootKey);
 225                 return
 226             }
 227         }
 228         hideValidationError();
 229         showPending();
 230         // Clear existing mnemonic and passphrase
 231         DOM.phrase.val("");
 232         DOM.passphrase.val("");
 233         seed = null;
 234         if (rootKeyChangedTimeoutEvent != null) {
 235             clearTimeout(rootKeyChangedTimeoutEvent);
 236         }
 237         rootKeyChangedTimeoutEvent = setTimeout(rootKeyChanged, 400);
 238     }
 239
 240     function rootKeyChanged() {
 241         showPending();
 242         hideValidationError();
 243         // Validate the root key TODO
 244         var rootKeyBase58 = DOM.rootKey.val();
 245         var errorText = validateRootKey(rootKeyBase58);
 246         if (errorText) {
 247             showValidationError(errorText);
 248             return;
 249         }
 250         // Calculate and display
 251         calcBip32RootKeyFromBase58(rootKeyBase58);
 252         calcForDerivationPath();
 253     }
 254
 255     function calcForDerivationPath() {
 256         showPending();
 257         clearAddressesList();
 258         hideValidationError();
 259         // Get the derivation path
 260         var derivationPath = getDerivationPath();
 261         var errorText = findDerivationPathErrors(derivationPath);
 262         if (errorText) {
 263             showValidationError(errorText);
 264             return;
 265         }
 266         bip32ExtendedKey = calcBip32ExtendedKey(derivationPath);
 267         if (bip44TabSelected()) {
 268             displayBip44Info();
 269         }
 270         displayBip32Info();
 271         hidePending();
 272     }
 273
 274     function generateClicked() {
 275         if (isUsingOwnEntropy()) {
 276             return;
 277         }
 278         clearDisplay();
 279         showPending();
 280         setTimeout(function() {
 281             setMnemonicLanguage();
 282             var phrase = generateRandomPhrase();
 283             if (!phrase) {
 284                 return;
 285             }
 286             phraseChanged();
 287         }, 50);
 288     }
 289
 290     function languageChanged() {
 291         setTimeout(function() {
 292             setMnemonicLanguage();
 293             if (DOM.phrase.val().length > 0) {
 294                 var newPhrase = convertPhraseToNewLanguage();
 295                 DOM.phrase.val(newPhrase);
 296                 phraseChanged();
 297             }
 298             else {
 299                 DOM.generate.trigger("click");
 300             }
 301         }, 50);
 302     }
 303
 304     function toggleIndexes() {
 305         showIndex = !showIndex;
 306         $("td.index span").toggleClass("invisible");
 307     }
 308
 309     function toggleAddresses() {
 310         showAddress = !showAddress;
 311         $("td.address span").toggleClass("invisible");
 312     }
 313
 314     function togglePublicKeys() {
 315         showPubKey = !showPubKey;
 316         $("td.pubkey span").toggleClass("invisible");
 317     }
 318
 319     function togglePrivateKeys() {
 320         showPrivKey = !showPrivKey;
 321         $("td.privkey span").toggleClass("invisible");
 322     }
 323
 324     // Private methods
 325
 326     function generateRandomPhrase() {
 327         if (!hasStrongRandom()) {
 328             var errorText = "This browser does not support strong randomness";
 329             showValidationError(errorText);
 330             return;
 331         }
 332         var numWords = parseInt(DOM.generatedStrength.val());
 333         var strength = numWords / 3 * 32;
 334         var words = mnemonic.generate(strength);
 335         DOM.phrase.val(words);
 336         return words;
 337     }
 338
 339     function calcBip32RootKeyFromSeed(phrase, passphrase) {
 340         seed = mnemonic.toSeed(phrase, passphrase);
 341         bip32RootKey = bitcoin.HDNode.fromSeedHex(seed, network);
 342     }
 343
 344     function calcBip32RootKeyFromBase58(rootKeyBase58) {
 345         bip32RootKey = bitcoin.HDNode.fromBase58(rootKeyBase58, network);
 346     }
 347
 348     function calcBip32ExtendedKey(path) {
 349         // Check there's a root key to derive from
 350         if (!bip32RootKey) {
 351             return bip32RootKey;
 352         }
 353         var extendedKey = bip32RootKey;
 354         // Derive the key from the path
 355         var pathBits = path.split("/");
 356         for (var i=0; i<pathBits.length; i++) {
 357             var bit = pathBits[i];
 358             var index = parseInt(bit);
 359             if (isNaN(index)) {
 360                 continue;
 361             }
 362             var hardened = bit[bit.length-1] == "'";
 363             var isPriv = "privKey" in extendedKey;
 364             var invalidDerivationPath = hardened && !isPriv;
 365             if (invalidDerivationPath) {
 366                 extendedKey = null;
 367             }
 368             else if (hardened) {
 369                 extendedKey = extendedKey.deriveHardened(index);
 370             }
 371             else {
 372                 extendedKey = extendedKey.derive(index);
 373             }
 374         }
 375         return extendedKey
 376     }
 377
 378     function showValidationError(errorText) {
 379         DOM.feedback
 380             .text(errorText)
 381             .show();
 382     }
 383
 384     function hideValidationError() {
 385         DOM.feedback
 386             .text("")
 387             .hide();
 388     }
 389
 390     function findPhraseErrors(phrase) {
 391         // Preprocess the words
 392         phrase = mnemonic.normalizeString(phrase);
 393         var words = phraseToWordArray(phrase);
 394         // Detect blank phrase
 395         if (words.length == 0) {
 396             return "Blank mnemonic";
 397         }
 398         // Check each word
 399         for (var i=0; i<words.length; i++) {
 400             var word = words[i];
 401             var language = getLanguage();
 402             if (WORDLISTS[language].indexOf(word) == -1) {
 403                 console.log("Finding closest match to " + word);
 404                 var nearestWord = findNearestWord(word);
 405                 return word + " not in wordlist, did you mean " + nearestWord + "?";
 406             }
 407         }
 408         // Check the words are valid
 409         var properPhrase = wordArrayToPhrase(words);
 410         var isValid = mnemonic.check(properPhrase);
 411         if (!isValid) {
 412             return "Invalid mnemonic";
 413         }
 414         return false;
 415     }
 416
 417     function validateRootKey(rootKeyBase58) {
 418         try {
 419             bitcoin.HDNode.fromBase58(rootKeyBase58);
 420         }
 421         catch (e) {
 422             return "Invalid root key";
 423         }
 424         return "";
 425     }
 426
 427     function getDerivationPath() {
 428         if (bip44TabSelected()) {
 429             var purpose = parseIntNoNaN(DOM.bip44purpose.val(), 44);
 430             var coin = parseIntNoNaN(DOM.bip44coin.val(), 0);
 431             var account = parseIntNoNaN(DOM.bip44account.val(), 0);
 432             var change = parseIntNoNaN(DOM.bip44change.val(), 0);
 433             var path = "m/";
 434             path += purpose + "'/";
 435             path += coin + "'/";
 436             path += account + "'/";
 437             path += change;
 438             DOM.bip44path.val(path);
 439             var derivationPath = DOM.bip44path.val();
 440             console.log("Using derivation path from BIP44 tab: " + derivationPath);
 441             return derivationPath;
 442         }
 443         else if (bip32TabSelected()) {
 444             var derivationPath = DOM.bip32path.val();
 445             console.log("Using derivation path from BIP32 tab: " + derivationPath);
 446             return derivationPath;
 447         }
 448         else {
 449             console.log("Unknown derivation path");
 450         }
 451     }
 452
 453     function findDerivationPathErrors(path) {
 454         // TODO is not perfect but is better than nothing
 455         // Inspired by
 456         // https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki#test-vectors
 457         // and
 458         // https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki#extended-keys
 459         var maxDepth = 255; // TODO verify this!!
 460         var maxIndexValue = Math.pow(2, 31); // TODO verify this!!
 461         if (path[0] != "m") {
 462             return "First character must be 'm'";
 463         }
 464         if (path.length > 1) {
 465             if (path[1] != "/") {
 466                 return "Separator must be '/'";
 467             }
 468             var indexes = path.split("/");
 469             if (indexes.length > maxDepth) {
 470                 return "Derivation depth is " + indexes.length + ", must be less than " + maxDepth;
 471             }
 472             for (var depth = 1; depth<indexes.length; depth++) {
 473                 var index = indexes[depth];
 474                 var invalidChars = index.replace(/^[0-9]+'?$/g, "")
 475                 if (invalidChars.length > 0) {
 476                     return "Invalid characters " + invalidChars + " found at depth " + depth;
 477                 }
 478                 var indexValue = parseInt(index.replace("'", ""));
 479                 if (isNaN(depth)) {
 480                     return "Invalid number at depth " + depth;
 481                 }
 482                 if (indexValue > maxIndexValue) {
 483                     return "Value of " + indexValue + " at depth " + depth + " must be less than " + maxIndexValue;
 484                 }
 485             }
 486         }
 487         // Check root key exists or else derivation path is useless!
 488         if (!bip32RootKey) {
 489             return "No root key";
 490         }
 491         // Check no hardened derivation path when using xpub keys
 492         var hardened = path.indexOf("'") > -1;
 493         var isXpubkey = !("privKey" in bip32RootKey);
 494         if (hardened && isXpubkey) {
 495             return "Hardened derivation path is invalid with xpub key";
 496         }
 497         return false;
 498     }
 499
 500     function displayBip44Info() {
 501         // Get the derivation path for the account
 502         var purpose = parseIntNoNaN(DOM.bip44purpose.val(), 44);
 503         var coin = parseIntNoNaN(DOM.bip44coin.val(), 0);
 504         var account = parseIntNoNaN(DOM.bip44account.val(), 0);
 505         var path = "m/";
 506         path += purpose + "'/";
 507         path += coin + "'/";
 508         path += account + "'/";
 509         // Calculate the account extended keys
 510         var accountExtendedKey = calcBip32ExtendedKey(path);
 511         var accountXprv = accountExtendedKey.toBase58();
 512         var accountXpub = accountExtendedKey.toBase58(false);
 513         // Display the extended keys
 514         DOM.bip44accountXprv.val(accountXprv);
 515         DOM.bip44accountXpub.val(accountXpub);
 516     }
 517
 518     function displayBip32Info() {
 519         // Display the key
 520         DOM.seed.val(seed);
 521         var rootKey = bip32RootKey.toBase58();
 522         DOM.rootKey.val(rootKey);
 523         var xprvkeyB58 = "NA";
 524         if (bip32ExtendedKey.privKey) {
 525             xprvkeyB58 = bip32ExtendedKey.toBase58();
 526         }
 527         var extendedPrivKey = xprvkeyB58;
 528         DOM.extendedPrivKey.val(extendedPrivKey);
 529         var extendedPubKey = bip32ExtendedKey.toBase58(false);
 530         DOM.extendedPubKey.val(extendedPubKey);
 531         // Display the addresses and privkeys
 532         clearAddressesList();
 533         displayAddresses(0, 20);
 534     }
 535
 536     function displayAddresses(start, total) {
 537         generationProcesses.push(new (function() {
 538
 539             var rows = [];
 540
 541             this.stop = function() {
 542                 for (var i=0; i<rows.length; i++) {
 543                     rows[i].shouldGenerate = false;
 544                 }
 545             }
 546
 547             for (var i=0; i<total; i++) {
 548                 var index = i + start;
 549                 rows.push(new TableRow(index));
 550             }
 551
 552         })());
 553     }
 554
 555     function TableRow(index) {
 556
 557         var self = this;
 558         this.shouldGenerate = true;
 559         var useHardenedAddresses = DOM.hardenedAddresses.prop("checked");
 560
 561         function init() {
 562             calculateValues();
 563         }
 564
 565         function calculateValues() {
 566             setTimeout(function() {
 567                 if (!self.shouldGenerate) {
 568                     return;
 569                 }
 570                 var key = "";
 571                 if (useHardenedAddresses) {
 572                     key = bip32ExtendedKey.deriveHardened(index);
 573                 }
 574                 else {
 575                     key = bip32ExtendedKey.derive(index);
 576                 }
 577                 var address = key.getAddress().toString();
 578                 var privkey = "NA";
 579                 if (key.privKey) {
 580                     privkey = key.privKey.toWIF(network);
 581                 }
 582                 var pubkey = key.pubKey.toHex();
 583                 var indexText = getDerivationPath() + "/" + index;
 584                 if (useHardenedAddresses) {
 585                     indexText = indexText + "'";
 586                 }
 587                 // Ethereum values are different
 588                 if (networks[DOM.network.val()].name == "Ethereum") {
 589                     var privKeyBuffer = key.privKey.d.toBuffer();
 590                     privkey = privKeyBuffer.toString('hex');
 591                     var addressBuffer = ethUtil.privateToAddress(privKeyBuffer);
 592                     var hexAddress = addressBuffer.toString('hex');
 593                     var checksumAddress = ethUtil.toChecksumAddress(hexAddress);
 594                     address = ethUtil.addHexPrefix(checksumAddress);
 595                     privkey = ethUtil.addHexPrefix(privkey);
 596                     pubkey = ethUtil.addHexPrefix(pubkey);
 597                 }
 598                 // Ripple values are different
 599                 if (networks[DOM.network.val()].name == "Ripple") {
 600                     privkey = convertRipplePriv(privkey);
 601                     address = convertRippleAdrr(address);
 602                 }
 603                 addAddressToList(indexText, address, pubkey, privkey);
 604             }, 50)
 605         }
 606
 607         init();
 608
 609     }
 610
 611     function showMore() {
 612         var start = DOM.addresses.children().length;
 613         var rowsToAdd = parseInt(DOM.rowsToAdd.val());
 614         if (isNaN(rowsToAdd)) {
 615             rowsToAdd = 20;
 616             DOM.rowsToAdd.val("20");
 617         }
 618         if (rowsToAdd > 200) {
 619             var msg = "Generating " + rowsToAdd + " rows could take a while. ";
 620             msg += "Do you want to continue?";
 621             if (!confirm(msg)) {
 622                 return;
 623             }
 624         }
 625         displayAddresses(start, rowsToAdd);
 626     }
 627
 628     function clearDisplay() {
 629         clearAddressesList();
 630         clearKey();
 631         hideValidationError();
 632     }
 633
 634     function clearAddressesList() {
 635         DOM.addresses.empty();
 636         stopGenerating();
 637     }
 638
 639     function stopGenerating() {
 640         while (generationProcesses.length > 0) {
 641             var generation = generationProcesses.shift();
 642             generation.stop();
 643         }
 644     }
 645
 646     function clearKey() {
 647         DOM.rootKey.val("");
 648         DOM.extendedPrivKey.val("");
 649         DOM.extendedPubKey.val("");
 650     }
 651
 652     function addAddressToList(indexText, address, pubkey, privkey) {
 653         var row = $(addressRowTemplate.html());
 654         // Elements
 655         var indexCell = row.find(".index span");
 656         var addressCell = row.find(".address span");
 657         var pubkeyCell = row.find(".pubkey span");
 658         var privkeyCell = row.find(".privkey span");
 659         // Content
 660         indexCell.text(indexText);
 661         addressCell.text(address);
 662         pubkeyCell.text(pubkey);
 663         privkeyCell.text(privkey);
 664         // Visibility
 665         if (!showIndex) {
 666             indexCell.addClass("invisible");
 667         }
 668         if (!showAddress) {
 669             addressCell.addClass("invisible");
 670         }
 671         if (!showPubKey) {
 672             pubkeyCell.addClass("invisible");
 673         }
 674         if (!showPrivKey) {
 675             privkeyCell.addClass("invisible");
 676         }
 677         DOM.addresses.append(row);
 678         var rowShowQrEls = row.find("[data-show-qr]");
 679         setQrEvents(rowShowQrEls);
 680     }
 681
 682     function hasStrongRandom() {
 683         return 'crypto' in window && window['crypto'] !== null;
 684     }
 685
 686     function disableForms() {
 687         $("form").on("submit", function(e) {
 688             e.preventDefault();
 689         });
 690     }
 691
 692     function parseIntNoNaN(val, defaultVal) {
 693         var v = parseInt(val);
 694         if (isNaN(v)) {
 695             return defaultVal;
 696         }
 697         return v;
 698     }
 699
 700     function showPending() {
 701         DOM.feedback
 702             .text("Calculating...")
 703             .show();
 704     }
 705
 706     function findNearestWord(word) {
 707         var language = getLanguage();
 708         var words = WORDLISTS[language];
 709         var minDistance = 99;
 710         var closestWord = words[0];
 711         for (var i=0; i<words.length; i++) {
 712             var comparedTo = words[i];
 713             if (comparedTo.indexOf(word) == 0) {
 714                 return comparedTo;
 715             }
 716             var distance = Levenshtein.get(word, comparedTo);
 717             if (distance < minDistance) {
 718                 closestWord = comparedTo;
 719                 minDistance = distance;
 720             }
 721         }
 722         return closestWord;
 723     }
 724
 725     function hidePending() {
 726         DOM.feedback
 727             .text("")
 728             .hide();
 729     }
 730
 731     function populateNetworkSelect() {
 732         for (var i=0; i<networks.length; i++) {
 733             var network = networks[i];
 734             var option = $("<option>");
 735             option.attr("value", i);
 736             option.text(network.name);
 737             DOM.phraseNetwork.append(option);
 738         }
 739     }
 740
 741     function populateClientSelect() {
 742         for (var i=0; i<clients.length; i++) {
 743             var client = clients[i];
 744             var option = $("<option>");
 745             option.attr("value", i);
 746             option.text(client.name);
 747             DOM.bip32Client.append(option);
 748         }
 749     }
 750
 751     function getLanguage() {
 752         var defaultLanguage = "english";
 753         // Try to get from existing phrase
 754         var language = getLanguageFromPhrase();
 755         // Try to get from url if not from phrase
 756         if (language.length == 0) {
 757             language = getLanguageFromUrl();
 758         }
 759         // Default to English if no other option
 760         if (language.length == 0) {
 761             language = defaultLanguage;
 762         }
 763         return language;
 764     }
 765
 766     function getLanguageFromPhrase(phrase) {
 767         // Check if how many words from existing phrase match a language.
 768         var language = "";
 769         if (!phrase) {
 770             phrase = DOM.phrase.val();
 771         }
 772         if (phrase.length > 0) {
 773             var words = phraseToWordArray(phrase);
 774             var languageMatches = {};
 775             for (l in WORDLISTS) {
 776                 // Track how many words match in this language
 777                 languageMatches[l] = 0;
 778                 for (var i=0; i<words.length; i++) {
 779                     var wordInLanguage = WORDLISTS[l].indexOf(words[i]) > -1;
 780                     if (wordInLanguage) {
 781                         languageMatches[l]++;
 782                     }
 783                 }
 784                 // Find languages with most word matches.
 785                 // This is made difficult due to commonalities between Chinese
 786                 // simplified vs traditional.
 787                 var mostMatches = 0;
 788                 var mostMatchedLanguages = [];
 789                 for (var l in languageMatches) {
 790                     var numMatches = languageMatches[l];
 791                     if (numMatches > mostMatches) {
 792                         mostMatches = numMatches;
 793                         mostMatchedLanguages = [l];
 794                     }
 795                     else if (numMatches == mostMatches) {
 796                         mostMatchedLanguages.push(l);
 797                     }
 798                 }
 799             }
 800             if (mostMatchedLanguages.length > 0) {
 801                 // Use first language and warn if multiple detected
 802                 language = mostMatchedLanguages[0];
 803                 if (mostMatchedLanguages.length > 1) {
 804                     console.warn("Multiple possible languages");
 805                     console.warn(mostMatchedLanguages);
 806                 }
 807             }
 808         }
 809         return language;
 810     }
 811
 812     function getLanguageFromUrl() {
 813         for (var language in WORDLISTS) {
 814             if (window.location.hash.indexOf(language) > -1) {
 815                 return language;
 816             }
 817         }
 818         return "";
 819     }
 820
 821     function setMnemonicLanguage() {
 822         var language = getLanguage();
 823         // Load the bip39 mnemonic generator for this language if required
 824         if (!(language in mnemonics)) {
 825             mnemonics[language] = new Mnemonic(language);
 826         }
 827         mnemonic = mnemonics[language];
 828     }
 829
 830     function convertPhraseToNewLanguage() {
 831         var oldLanguage = getLanguageFromPhrase();
 832         var newLanguage = getLanguageFromUrl();
 833         var oldPhrase = DOM.phrase.val();
 834         var oldWords = phraseToWordArray(oldPhrase);
 835         var newWords = [];
 836         for (var i=0; i<oldWords.length; i++) {
 837             var oldWord = oldWords[i];
 838             var index = WORDLISTS[oldLanguage].indexOf(oldWord);
 839             var newWord = WORDLISTS[newLanguage][index];
 840             newWords.push(newWord);
 841         }
 842         newPhrase = wordArrayToPhrase(newWords);
 843         return newPhrase;
 844     }
 845
 846     // TODO look at jsbip39 - mnemonic.splitWords
 847     function phraseToWordArray(phrase) {
 848         var words = phrase.split(/\s/g);
 849         var noBlanks = [];
 850         for (var i=0; i<words.length; i++) {
 851             var word = words[i];
 852             if (word.length > 0) {
 853                 noBlanks.push(word);
 854             }
 855         }
 856         return noBlanks;
 857     }
 858
 859     // TODO look at jsbip39 - mnemonic.joinWords
 860     function wordArrayToPhrase(words) {
 861         var phrase = words.join(" ");
 862         var language = getLanguageFromPhrase(phrase);
 863         if (language == "japanese") {
 864             phrase = words.join("\u3000");
 865         }
 866         return phrase;
 867     }
 868
 869     function isUsingOwnEntropy() {
 870         return DOM.useEntropy.prop("checked");
 871     }
 872
 873     function setMnemonicFromEntropy() {
 874         clearEntropyFeedback();
 875         // Get entropy value
 876         var entropyStr = DOM.entropy.val();
 877         // Work out minimum base for entropy
 878         var entropy = Entropy.fromString(entropyStr);
 879         if (entropy.binaryStr.length == 0) {
 880             return;
 881         }
 882         // Show entropy details
 883         showEntropyFeedback(entropy);
 884         // Use entropy hash if not using raw entropy
 885         var bits = entropy.binaryStr;
 886         var mnemonicLength = DOM.entropyMnemonicLength.val();
 887         if (mnemonicLength != "raw") {
 888             // Get bits by hashing entropy with SHA256
 889             var hash = sjcl.hash.sha256.hash(entropy.cleanStr);
 890             var hex = sjcl.codec.hex.fromBits(hash);
 891             bits = BigInteger.parse(hex, 16).toString(2);
 892             while (bits.length % 256 != 0) {
 893                 bits = "0" + bits;
 894             }
 895             // Truncate hash to suit number of words
 896             mnemonicLength = parseInt(mnemonicLength);
 897             var numberOfBits = 32 * mnemonicLength / 3;
 898             bits = bits.substring(0, numberOfBits);
 899         }
 900         // Discard trailing entropy
 901         var bitsToUse = Math.floor(bits.length / 32) * 32;
 902         var start = bits.length - bitsToUse;
 903         var binaryStr = bits.substring(start);
 904         // Convert entropy string to numeric array
 905         var entropyArr = [];
 906         for (var i=0; i<binaryStr.length / 8; i++) {
 907             var byteAsBits = binaryStr.substring(i*8, i*8+8);
 908             var entropyByte = parseInt(byteAsBits, 2);
 909             entropyArr.push(entropyByte)
 910         }
 911         // Convert entropy array to mnemonic
 912         var phrase = mnemonic.toMnemonic(entropyArr);
 913         // Set the mnemonic in the UI
 914         DOM.phrase.val(phrase);
 915     }
 916
 917     function clearEntropyFeedback() {
 918         DOM.entropyStrength.text("...");
 919         DOM.entropyType.text("");
 920         DOM.entropyWordCount.text("0");
 921         DOM.entropyEventCount.text("0");
 922         DOM.entropyBitsPerEvent.text("0");
 923         DOM.entropyBits.text("0");
 924         DOM.entropyFiltered.html("&nbsp;");
 925         DOM.entropyBinary.html("&nbsp;");
 926     }
 927
 928     function showEntropyFeedback(entropy) {
 929         var numberOfBits = entropy.binaryStr.length;
 930         var strength = "extremely weak";
 931         if (numberOfBits >= 64) {
 932             strength = "very weak";
 933         }
 934         if (numberOfBits >= 96) {
 935             strength = "weak";
 936         }
 937         if (numberOfBits >= 128) {
 938             strength = "strong";
 939         }
 940         if (numberOfBits >= 160) {
 941             strength = "very strong";
 942         }
 943         if (numberOfBits >= 192) {
 944             strength = "extremely strong";
 945         }
 946         // If time to crack is less than one day, and password is considered
 947         // strong or better based on the number of bits, rename strength to
 948         // 'easily cracked'.
 949         try {
 950             var z = zxcvbn(entropy.base.parts.join(""));
 951             var timeToCrack = z.crack_times_seconds.offline_fast_hashing_1e10_per_second;
 952             if (timeToCrack < 86400 && entropy.binaryStr.length >= 128) {
 953                 strength = "easily cracked";
 954                 if (z.feedback.warning != "") {
 955                     strength = strength + " - " + z.feedback.warning;
 956                 };
 957             }
 958         }
 959         catch (e) {
 960             strength = "unknown";
 961             console.log("Error detecting entropy strength with zxcvbn:");
 962             console.log(e);
 963         }
 964         var entropyTypeStr = getEntropyTypeStr(entropy);
 965         var wordCount = Math.floor(numberOfBits / 32) * 3;
 966         var bitsPerEvent = entropy.bitsPerEvent.toFixed(2);
 967         DOM.entropyFiltered.html(entropy.cleanHtml);
 968         DOM.entropyType.text(entropyTypeStr);
 969         DOM.entropyStrength.text(strength);
 970         DOM.entropyEventCount.text(entropy.base.ints.length);
 971         DOM.entropyBits.text(numberOfBits);
 972         DOM.entropyWordCount.text(wordCount);
 973         DOM.entropyBinary.text(entropy.binaryStr);
 974         DOM.entropyBitsPerEvent.text(bitsPerEvent);
 975     }
 976
 977     function getEntropyTypeStr(entropy) {
 978         var typeStr = entropy.base.str;
 979         // Add some detail if these are cards
 980         if (entropy.base.asInt == 52) {
 981             var cardDetail = []; // array of message strings
 982             // Detect duplicates
 983             var dupes = [];
 984             var dupeTracker = {};
 985             for (var i=0; i<entropy.base.parts.length; i++) {
 986                 var card = entropy.base.parts[i];
 987                 var cardUpper = card.toUpperCase();
 988                 if (cardUpper in dupeTracker) {
 989                     dupes.push(card);
 990                 }
 991                 dupeTracker[cardUpper] = true;
 992             }
 993             if (dupes.length > 0) {
 994                 var dupeWord = "duplicates";
 995                 if (dupes.length == 1) {
 996                     dupeWord = "duplicate";
 997                 }
 998                 var msg = dupes.length + " " + dupeWord + ": " + dupes.slice(0,3).join(" ");
 999                 if (dupes.length > 3) {
1000                     msg += "...";
1001                 }
1002                 cardDetail.push(msg);
1003             }
1004             // Detect full deck
1005             var uniqueCards = [];
1006             for (var uniqueCard in dupeTracker) {
1007                 uniqueCards.push(uniqueCard);
1008             }
1009             if (uniqueCards.length == 52) {
1010                 cardDetail.unshift("full deck");
1011             }
1012             // Detect missing cards
1013             var values = "A23456789TJQK";
1014             var suits = "CDHS";
1015             var missingCards = [];
1016             for (var i=0; i<suits.length; i++) {
1017                 for (var j=0; j<values.length; j++) {
1018                     var card = values[j] + suits[i];
1019                     if (!(card in dupeTracker)) {
1020                         missingCards.push(card);
1021                     }
1022                 }
1023             }
1024             // Display missing cards if six or less, ie clearly going for full deck
1025             if (missingCards.length > 0 && missingCards.length <= 6) {
1026                 var msg = missingCards.length + " missing: " + missingCards.slice(0,3).join(" ");
1027                 if (missingCards.length > 3) {
1028                     msg += "...";
1029                 }
1030                 cardDetail.push(msg);
1031             }
1032             // Add card details to typeStr
1033             if (cardDetail.length > 0) {
1034                 typeStr += " (" + cardDetail.join(", ") + ")";
1035             }
1036         }
1037         return typeStr;
1038     }
1039
1040     function setQrEvents(els) {
1041         els.on("mouseenter", createQr);
1042         els.on("mouseleave", destroyQr);
1043         els.on("click", toggleQr);
1044     }
1045
1046     function createQr(e) {
1047         var content = e.target.textContent || e.target.value;
1048         if (content) {
1049             var size = 130;
1050             DOM.qrImage.qrcode({width: size, height: size, text: content});
1051             if (!showQr) {
1052                 DOM.qrHider.addClass("hidden");
1053             }
1054             else {
1055                 DOM.qrHider.removeClass("hidden");
1056             }
1057             DOM.qrContainer.removeClass("hidden");
1058         }
1059     }
1060
1061     function destroyQr() {
1062         DOM.qrImage.text("");
1063         DOM.qrContainer.addClass("hidden");
1064     }
1065
1066     function toggleQr() {
1067         showQr = !showQr;
1068         DOM.qrHider.toggleClass("hidden");
1069         DOM.qrHint.toggleClass("hidden");
1070     }
1071
1072     function bip44TabSelected() {
1073         return DOM.bip44tab.hasClass("active");
1074     }
1075
1076     function bip32TabSelected() {
1077         return DOM.bip32tab.hasClass("active");
1078     }
1079
1080     var networks = [
1081         {
1082             name: "Bitcoin",
1083             onSelect: function() {
1084                 network = bitcoin.networks.bitcoin;
1085                 DOM.bip44coin.val(0);
1086             },
1087         },
1088         {
1089             name: "Bitcoin Testnet",
1090             onSelect: function() {
1091                 network = bitcoin.networks.testnet;
1092                 DOM.bip44coin.val(1);
1093             },
1094         },
1095         {
1096             name: "CLAM",
1097             onSelect: function() {
1098                 network = bitcoin.networks.clam;
1099                 DOM.bip44coin.val(23);
1100             },
1101         },
1102         {
1103             name: "Dogecoin",
1104             onSelect: function() {
1105                 network = bitcoin.networks.dogecoin;
1106                 DOM.bip44coin.val(3);
1107             },
1108         },
1109         {
1110             name: "DASH",
1111             onSelect: function() {
1112                 network = bitcoin.networks.dash;
1113                 DOM.bip44coin.val(5);
1114             },
1115         },
1116         {
1117             name: "Ethereum",
1118             onSelect: function() {
1119                 network = bitcoin.networks.bitcoin;
1120                 DOM.bip44coin.val(60);
1121             },
1122         },
1123         {
1124             name: "GAME",
1125             onSelect: function() {
1126                 network = bitcoin.networks.game;
1127                 DOM.bip44coin.val(101);
1128             },
1129         },
1130         {
1131             name: "Jumbucks",
1132             onSelect: function() {
1133                 network = bitcoin.networks.jumbucks;
1134                 DOM.bip44coin.val(26);
1135             },
1136         },
1137         {
1138             name: "Litecoin",
1139             onSelect: function() {
1140                 network = bitcoin.networks.litecoin;
1141                 DOM.bip44coin.val(2);
1142             },
1143         },
1144         {
1145             name: "Namecoin",
1146             onSelect: function() {
1147                 network = bitcoin.networks.namecoin;
1148                 DOM.bip44coin.val(7);
1149             },
1150         },
1151         {
1152             name: "Peercoin",
1153             onSelect: function() {
1154                 network = bitcoin.networks.peercoin;
1155                 DOM.bip44coin.val(6);
1156             },
1157         },
1158         {
1159             name: "Ripple",
1160             onSelect: function() {
1161                 network = bitcoin.networks.bitcoin;
1162                 DOM.bip44coin.val(144);
1163             },
1164         },
1165         {
1166             name: "ShadowCash",
1167             onSelect: function() {
1168                 network = bitcoin.networks.shadow;
1169                 DOM.bip44coin.val(35);
1170             },
1171         },
1172         {
1173             name: "ShadowCash Testnet",
1174             onSelect: function() {
1175                 network = bitcoin.networks.shadowtn;
1176                 DOM.bip44coin.val(1);
1177             },
1178         },
1179         {
1180             name: "Slimcoin",
1181             onSelect: function() {
1182                 network = bitcoin.networks.slimcoin;
1183                 DOM.bip44coin.val(63);
1184             },
1185         },
1186         {
1187             name: "Slimcoin Testnet",
1188             onSelect: function() {
1189                 network = bitcoin.networks.slimcointn;
1190                 DOM.bip44coin.val(111);
1191             },
1192         },
1193         {
1194             name: "Viacoin",
1195             onSelect: function() {
1196                 network = bitcoin.networks.viacoin;
1197                 DOM.bip44coin.val(14);
1198             },
1199         },
1200         {
1201             name: "Viacoin Testnet",
1202             onSelect: function() {
1203                 network = bitcoin.networks.viacointestnet;
1204                 DOM.bip44coin.val(1);
1205             },
1206         },
1207     ]
1208
1209     var clients = [
1210         {
1211             name: "Bitcoin Core",
1212             onSelect: function() {
1213                 DOM.bip32path.val("m/0'/0'");
1214                 DOM.hardenedAddresses.prop('checked', true);
1215             },
1216         },
1217         {
1218             name: "blockchain.info",
1219             onSelect: function() {
1220                 DOM.bip32path.val("m/44'/0'/0'");
1221                 DOM.hardenedAddresses.prop('checked', false);
1222             },
1223         },
1224         {
1225             name: "MultiBit HD",
1226             onSelect: function() {
1227                 DOM.bip32path.val("m/0'/0");
1228                 DOM.hardenedAddresses.prop('checked', false);
1229             },
1230         }
1231     ]
1232
1233     init();
1234
1235 })();