Added sanity checksums to all BIP39 wordlists on load.

src.ts/wordlists/lang-ja.ts

@@ -1,15 +1,11 @@
 
-import { register, Wordlist } from './wordlist';
-
-import { id } from '../utils/hash';
+import { check, register, Wordlist } from './wordlist';
 
 import { hexlify } from '../utils/bytes';
 import { toUtf8Bytes, toUtf8String } from '../utils/utf8';
 
 import * as errors from '../utils/errors';
 
-const CheckId = "0xe561f52ac5f1fe957460337bc400302f30af56ac8da6adc7311efa89fbbc0777";
-
 const data = [
 
     // 4-kana words
@@ -37,7 +33,7 @@ const data = [
 // Maps each character into its kana value (the index)
 const mapping = "~~AzB~X~a~KN~Q~D~S~C~G~E~Y~p~L~I~O~eH~g~V~hxyumi~~U~~Z~~v~~s~~dkoblPjfnqwMcRTr~W~~~F~~~~~Jt"
 
-let words: Array<string> = null;
+let wordlist: Array<string> = null;
 
 function hex(word: string) {
     return hexlify(toUtf8Bytes(word));
@@ -46,13 +42,10 @@ function hex(word: string) {
 const KiYoKu = '0xe3818de38284e3818f';
 const KyoKu = '0xe3818de38283e3818f'
 
-let error: Error = null;
-function loadWords() {
-    if (words !== null) {
-        if (error) { throw error; }
-        return;
-    }
-    words = [];
+function loadWords(lang: Wordlist) {
+    if (wordlist !== null) { return; }
+
+    wordlist = [];
 
     // Transforms for normalizing (sort is a not quite UTF-8)
     var transform: { [key: string]: string | boolean } = {};
@@ -101,26 +94,25 @@ function loadWords() {
                  word.push((k & 0x40) ? 130: 129);
                  word.push((k & 0x3f) + 128);
             }
-            words.push(toUtf8String(word));
+            wordlist.push(toUtf8String(word));
         }
     }
-    words.sort(sortJapanese);
+    wordlist.sort(sortJapanese);
 
     // For some reason kyoku and kiyoku are flipped in node (!!).
     // The order SHOULD be:
     //   - kyoku
     //   - kiyoku
 
-    if (hex(words[442]) === KiYoKu && hex(words[443]) === KyoKu) {
-        let tmp = words[442];
-        words[442] = words[443];
-        words[443] = tmp;
+    if (hex(wordlist[442]) === KiYoKu && hex(wordlist[443]) === KyoKu) {
+        let tmp = wordlist[442];
+        wordlist[442] = wordlist[443];
+        wordlist[443] = tmp;
     }
 
-    let check = id(words.join('\n'));
-    if (check !== CheckId) {
-        error = new Error('Japanese Wordlist FAILED to load; your browser sort is broken; please contract support@ethers.io.');
-        throw error;
+    if (check(lang) !== '0xcb36b09e6baa935787fd762ce65e80b0c6a8dabdfbc3a7f86ac0e2c4fd111600') {
+        wordlist = null;
+        throw new Error('BIP39 Wordlist for ja (Japanese) FAILED');
     }
 }
 
@@ -130,13 +122,13 @@ class LangJa extends Wordlist {
     }
 
     getWord(index: number): string {
-        loadWords();
-        return words[index];
+        loadWords(this);
+        return wordlist[index];
     }
 
     getWordIndex(word: string): number {
-        loadWords();
-        return words.indexOf(word);
+        loadWords(this);
+        return wordlist.indexOf(word);
     }
 
     split(mnemonic: string): Array<string> {

src.ts/wordlists/lang-ko.ts

@@ -1,5 +1,5 @@
 
-import { register, Wordlist } from './wordlist';
+import { check, register, Wordlist } from './wordlist';
 
 import { toUtf8String } from '../utils/utf8';
 
@@ -28,7 +28,7 @@ function getHangul(code: number): string {
 
 let wordlist: Array<string> = null;
 
-function loadWords(): void {
+function loadWords(lang: Wordlist): void {
     if (wordlist != null) { return; }
 
     wordlist = [];
@@ -45,9 +45,12 @@ function loadWords(): void {
     });
 
     wordlist.sort();
-}
-loadWords();
 
+    if (check(lang) !== '0xf9eddeace9c5d3da9c93cf7d3cd38f6a13ed3affb933259ae865714e8a3ae71a') {
+        wordlist = null;
+        throw new Error('BIP39 Wordlist for ko (Korean) FAILED');
+    }
+}
 
 
 class LangKo extends Wordlist {
@@ -56,12 +59,12 @@ class LangKo extends Wordlist {
     }
 
     getWord(index: number): string {
-        loadWords();
+        loadWords(this);
         return wordlist[index];
     }
 
     getWordIndex(word: string): number {
-        loadWords();
+        loadWords(this);
         return wordlist.indexOf(word);
     }
 }

src.ts/wordlists/lang-zh.ts

@@ -1,5 +1,5 @@
 
-import { register, Wordlist } from './wordlist';
+import { check, register, Wordlist } from './wordlist';
 
 import { toUtf8String } from '../utils/utf8';
 
@@ -8,29 +8,47 @@ const deltaData = "FAZDC6BALcLZCA+GBARCW8wNCcDDZ8LVFBOqqDUiou+M42TFAyERXFb7EjhP+
 
 // @TODO: Load lazily
 
-const words: { [key: string]: Array<string> } = {
-    zh_cn: [],
-    zh_tw: []
+const wordlist: { [key: string]: Array<string> } = {
+    zh_cn: null,
+    zh_tw: null
 }
 
-var codes = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-var style = "~!@#$%^&*_-=[]{}|;:,.()<>?"
+const Checks: { [key: string]: string } = {
+    zh_cn: '0x17bcc4d8547e5a7135e365d1ab443aaae95e76d8230c2782c67305d4f21497a1',
+    zh_tw: '0x51e720e90c7b87bec1d70eb6e74a21a449bd3ec9c020b01d3a40ed991b60ce5d'
+}
 
-let deltaOffset = 0;
-for (var i = 0; i < 2048; i++) {
+const codes = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+const style = "~!@#$%^&*_-=[]{}|;:,.()<>?"
+
+function loadWords(lang: Wordlist) {
+    if (wordlist[lang.locale] !== null) { return; }
+
+    wordlist[lang.locale] = [];
+
+    let deltaOffset = 0;
+    for (var i = 0; i < 2048; i++) {
         let s = style.indexOf(data[i * 3]);
         let bytes = [
             228 + (s >> 2),
             128 + codes.indexOf(data[i * 3 + 1]),
             128 + codes.indexOf(data[i * 3 + 2]),
         ];
-    words.zh_cn.push(toUtf8String(bytes));
 
+        if (lang.locale === 'zh_tw') {
             let common = s % 4;
             for (let i = common; i < 3; i++) {
                 bytes[i] = codes.indexOf(deltaData[deltaOffset++]) + ((i == 0) ? 228: 128);
             }
-    words.zh_tw.push(toUtf8String(bytes));
+        }
+
+        wordlist[lang.locale].push(toUtf8String(bytes));
+    }
+
+    if (check(lang) !== Checks[lang.locale]) {
+        wordlist[lang.locale] = null;
+        throw new Error('BIP39 Wordlist for ' + lang.locale + ' (Chinese) FAILED');
+    }
 }
 
 class LangZh extends Wordlist {
@@ -39,11 +57,13 @@ class LangZh extends Wordlist {
     }
 
     getWord(index: number): string {
-        return words[this.locale][index];
+        loadWords(this);
+        return wordlist[this.locale][index];
     }
 
     getWordIndex(word: string): number {
-        return words[this.locale].indexOf(word);
+        loadWords(this);
+        return wordlist[this.locale].indexOf(word);
     }
 
     split(mnemonic: string): Array<string> {

src.ts/wordlists/wordlist.ts

@@ -2,10 +2,22 @@
 // This gets overriddenby gulp during bip39-XX
 var exportWordlist = false;
 
+import { id } from '../utils/hash';
+
 import { defineReadOnly } from '../utils/properties';
 
 import { Wordlist as _Wordlist } from '../utils/types';
 
+export function check(wordlist: _Wordlist) {
+    var words = [];
+    for (let i = 0; i < 2048; i++) {
+        let word = wordlist.getWord(i);
+        if (i !== wordlist.getWordIndex(word)) { return '0x'; }
+        words.push(word);
+    }
+    return id(words.join('\n') + '\n');
+}
+
 export abstract class Wordlist implements _Wordlist {
     locale: string;