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