56 lines
2.1 KiB
JavaScript
56 lines
2.1 KiB
JavaScript
"use strict";
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import { ethers } from "ethers";
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import scrypt from "scrypt-js";
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import { version } from "./_version";
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const logger = new ethers.utils.Logger(version);
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let warned = false;
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export class BrainWallet extends ethers.Wallet {
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static _generate(username, password, legacy, progressCallback) {
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if (!warned) {
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logger.warn("Warning: using Brain Wallets should be considered insecure (this warning will not be repeated)");
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warned = true;
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}
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let usernameBytes = null;
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let passwordBytes = null;
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if (typeof (username) === 'string') {
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logger.checkNormalize();
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usernameBytes = ethers.utils.toUtf8Bytes(username.normalize('NFKC'));
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}
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else {
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usernameBytes = ethers.utils.arrayify(username);
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}
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if (typeof (password) === 'string') {
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logger.checkNormalize();
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passwordBytes = ethers.utils.toUtf8Bytes(password.normalize('NFKC'));
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}
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else {
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passwordBytes = ethers.utils.arrayify(password);
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}
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return new Promise((resolve, reject) => {
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scrypt(passwordBytes, usernameBytes, (1 << 18), 8, 1, 32, (error, progress, key) => {
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if (error) {
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reject(error);
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}
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else if (key) {
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if (legacy) {
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resolve(new BrainWallet(key));
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}
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else {
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let mnemonic = ethers.utils.entropyToMnemonic(ethers.utils.arrayify(key).slice(0, 16));
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resolve(new BrainWallet(ethers.Wallet.fromMnemonic(mnemonic)));
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}
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}
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else if (progressCallback) {
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return progressCallback(progress);
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}
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});
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});
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}
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static generate(username, password, progressCallback) {
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return BrainWallet._generate(username, password, false, progressCallback);
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}
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static generateLegacy(username, password, progressCallback) {
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return BrainWallet._generate(username, password, true, progressCallback);
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}
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}
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