355 lines
15 KiB
JavaScript
355 lines
15 KiB
JavaScript
"use strict";
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
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return extendStatics(d, b);
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};
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return function (d, b) {
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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var aes_js_1 = __importDefault(require("aes-js"));
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var scrypt_js_1 = __importDefault(require("scrypt-js"));
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var uuid_1 = __importDefault(require("uuid"));
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var address_1 = require("@ethersproject/address");
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var bytes_1 = require("@ethersproject/bytes");
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var hdnode_1 = require("@ethersproject/hdnode");
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var keccak256_1 = require("@ethersproject/keccak256");
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var pbkdf2_1 = require("@ethersproject/pbkdf2");
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var random_1 = require("@ethersproject/random");
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var properties_1 = require("@ethersproject/properties");
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var transactions_1 = require("@ethersproject/transactions");
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var utils_1 = require("./utils");
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// Exported Types
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var KeystoreAccount = /** @class */ (function (_super) {
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__extends(KeystoreAccount, _super);
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function KeystoreAccount() {
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return _super !== null && _super.apply(this, arguments) || this;
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}
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KeystoreAccount.prototype.isKeystoreAccount = function (value) {
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return !!(value && value._isKeystoreAccount);
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};
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return KeystoreAccount;
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}(properties_1.Description));
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exports.KeystoreAccount = KeystoreAccount;
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function decrypt(json, password, progressCallback) {
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var data = JSON.parse(json);
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var passwordBytes = utils_1.getPassword(password);
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var decrypt = function (key, ciphertext) {
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var cipher = utils_1.searchPath(data, "crypto/cipher");
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if (cipher === "aes-128-ctr") {
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var iv = utils_1.looseArrayify(utils_1.searchPath(data, "crypto/cipherparams/iv"));
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var counter = new aes_js_1.default.Counter(iv);
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var aesCtr = new aes_js_1.default.ModeOfOperation.ctr(key, counter);
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return bytes_1.arrayify(aesCtr.decrypt(ciphertext));
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}
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return null;
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};
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var computeMAC = function (derivedHalf, ciphertext) {
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return keccak256_1.keccak256(bytes_1.concat([derivedHalf, ciphertext]));
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};
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var getAccount = function (key, reject) {
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var ciphertext = utils_1.looseArrayify(utils_1.searchPath(data, "crypto/ciphertext"));
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var computedMAC = bytes_1.hexlify(computeMAC(key.slice(16, 32), ciphertext)).substring(2);
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if (computedMAC !== utils_1.searchPath(data, "crypto/mac").toLowerCase()) {
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reject(new Error("invalid password"));
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return null;
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}
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var privateKey = decrypt(key.slice(0, 16), ciphertext);
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var mnemonicKey = key.slice(32, 64);
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if (!privateKey) {
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reject(new Error("unsupported cipher"));
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return null;
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}
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var address = data.address.toLowerCase();
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if (address.substring(0, 2) !== "0x") {
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address = "0x" + address;
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}
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try {
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if (address_1.getAddress(address) !== transactions_1.computeAddress(privateKey)) {
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reject(new Error("address mismatch"));
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return null;
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}
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}
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catch (e) { }
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var account = {
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_isKeystoreAccount: true,
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address: address,
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privateKey: bytes_1.hexlify(privateKey)
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};
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// Version 0.1 x-ethers metadata must contain an encrypted mnemonic phrase
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if (utils_1.searchPath(data, "x-ethers/version") === "0.1") {
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var mnemonicCiphertext = utils_1.looseArrayify(utils_1.searchPath(data, "x-ethers/mnemonicCiphertext"));
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var mnemonicIv = utils_1.looseArrayify(utils_1.searchPath(data, "x-ethers/mnemonicCounter"));
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var mnemonicCounter = new aes_js_1.default.Counter(mnemonicIv);
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var mnemonicAesCtr = new aes_js_1.default.ModeOfOperation.ctr(mnemonicKey, mnemonicCounter);
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var path = utils_1.searchPath(data, "x-ethers/path") || hdnode_1.defaultPath;
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var entropy = bytes_1.arrayify(mnemonicAesCtr.decrypt(mnemonicCiphertext));
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var mnemonic = hdnode_1.entropyToMnemonic(entropy);
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var node = hdnode_1.HDNode.fromMnemonic(mnemonic).derivePath(path);
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if (node.privateKey != account.privateKey) {
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reject(new Error("mnemonic mismatch"));
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return null;
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}
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account.mnemonic = node.mnemonic;
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account.path = node.path;
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}
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return new KeystoreAccount(account);
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};
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return new Promise(function (resolve, reject) {
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var kdf = utils_1.searchPath(data, "crypto/kdf");
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if (kdf && typeof (kdf) === "string") {
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if (kdf.toLowerCase() === "scrypt") {
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var salt = utils_1.looseArrayify(utils_1.searchPath(data, "crypto/kdfparams/salt"));
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var N = parseInt(utils_1.searchPath(data, "crypto/kdfparams/n"));
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var r = parseInt(utils_1.searchPath(data, "crypto/kdfparams/r"));
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var p = parseInt(utils_1.searchPath(data, "crypto/kdfparams/p"));
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if (!N || !r || !p) {
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reject(new Error("unsupported key-derivation function parameters"));
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return;
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}
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// Make sure N is a power of 2
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if ((N & (N - 1)) !== 0) {
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reject(new Error("unsupported key-derivation function parameter value for N"));
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return;
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}
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var dkLen = parseInt(utils_1.searchPath(data, "crypto/kdfparams/dklen"));
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if (dkLen !== 32) {
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reject(new Error("unsupported key-derivation derived-key length"));
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return;
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}
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if (progressCallback) {
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progressCallback(0);
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}
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scrypt_js_1.default(passwordBytes, salt, N, r, p, 64, function (error, progress, key) {
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if (error) {
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error.progress = progress;
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reject(error);
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}
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else if (key) {
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key = bytes_1.arrayify(key);
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var account = getAccount(key, reject);
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if (!account) {
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return;
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}
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if (progressCallback) {
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progressCallback(1);
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}
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resolve(account);
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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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else if (kdf.toLowerCase() === "pbkdf2") {
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var salt = utils_1.looseArrayify(utils_1.searchPath(data, "crypto/kdfparams/salt"));
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var prfFunc = null;
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var prf = utils_1.searchPath(data, "crypto/kdfparams/prf");
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if (prf === "hmac-sha256") {
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prfFunc = "sha256";
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}
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else if (prf === "hmac-sha512") {
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prfFunc = "sha512";
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}
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else {
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reject(new Error("unsupported prf"));
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return;
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}
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var c = parseInt(utils_1.searchPath(data, "crypto/kdfparams/c"));
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var dkLen = parseInt(utils_1.searchPath(data, "crypto/kdfparams/dklen"));
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if (dkLen !== 32) {
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reject(new Error("unsupported key-derivation derived-key length"));
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return;
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}
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var key = bytes_1.arrayify(pbkdf2_1.pbkdf2(passwordBytes, salt, c, dkLen, prfFunc));
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var account = getAccount(key, reject);
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if (!account) {
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return;
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}
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resolve(account);
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}
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else {
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reject(new Error("unsupported key-derivation function"));
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}
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}
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else {
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reject(new Error("unsupported key-derivation function"));
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}
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});
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}
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exports.decrypt = decrypt;
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function encrypt(account, password, options, progressCallback) {
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try {
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if (address_1.getAddress(account.address) !== transactions_1.computeAddress(account.privateKey)) {
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throw new Error("address/privateKey mismatch");
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}
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if (account.mnemonic != null) {
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var node = hdnode_1.HDNode.fromMnemonic(account.mnemonic).derivePath(account.path || hdnode_1.defaultPath);
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if (node.privateKey != account.privateKey) {
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throw new Error("mnemonic mismatch");
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}
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}
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else if (account.path != null) {
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throw new Error("cannot specify path without mnemonic");
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}
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}
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catch (e) {
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return Promise.reject(e);
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}
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// the options are optional, so adjust the call as needed
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if (typeof (options) === "function" && !progressCallback) {
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progressCallback = options;
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options = {};
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}
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if (!options) {
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options = {};
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}
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var privateKey = bytes_1.arrayify(account.privateKey);
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var passwordBytes = utils_1.getPassword(password);
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var entropy = null;
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var path = account.path;
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if (account.mnemonic) {
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entropy = bytes_1.arrayify(hdnode_1.mnemonicToEntropy(account.mnemonic));
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if (!path) {
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path = hdnode_1.defaultPath;
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}
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}
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var client = options.client;
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if (!client) {
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client = "ethers.js";
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}
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// Check/generate the salt
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var salt = null;
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if (options.salt) {
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salt = bytes_1.arrayify(options.salt);
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}
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else {
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salt = random_1.randomBytes(32);
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;
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}
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// Override initialization vector
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var iv = null;
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if (options.iv) {
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iv = bytes_1.arrayify(options.iv);
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if (iv.length !== 16) {
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throw new Error("invalid iv");
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}
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}
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else {
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iv = random_1.randomBytes(16);
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}
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// Override the uuid
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var uuidRandom = null;
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if (options.uuid) {
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uuidRandom = bytes_1.arrayify(options.uuid);
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if (uuidRandom.length !== 16) {
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throw new Error("invalid uuid");
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}
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}
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else {
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uuidRandom = random_1.randomBytes(16);
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}
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// Override the scrypt password-based key derivation function parameters
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var N = (1 << 17), r = 8, p = 1;
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if (options.scrypt) {
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if (options.scrypt.N) {
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N = options.scrypt.N;
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}
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if (options.scrypt.r) {
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r = options.scrypt.r;
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}
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if (options.scrypt.p) {
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p = options.scrypt.p;
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}
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}
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return new Promise(function (resolve, reject) {
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if (progressCallback) {
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progressCallback(0);
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}
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// We take 64 bytes:
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// - 32 bytes As normal for the Web3 secret storage (derivedKey, macPrefix)
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// - 32 bytes AES key to encrypt mnemonic with (required here to be Ethers Wallet)
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scrypt_js_1.default(passwordBytes, salt, N, r, p, 64, function (error, progress, key) {
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if (error) {
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error.progress = progress;
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reject(error);
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}
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else if (key) {
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key = bytes_1.arrayify(key);
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// This will be used to encrypt the wallet (as per Web3 secret storage)
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var derivedKey = key.slice(0, 16);
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var macPrefix = key.slice(16, 32);
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// This will be used to encrypt the mnemonic phrase (if any)
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var mnemonicKey = key.slice(32, 64);
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// Encrypt the private key
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var counter = new aes_js_1.default.Counter(iv);
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var aesCtr = new aes_js_1.default.ModeOfOperation.ctr(derivedKey, counter);
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var ciphertext = bytes_1.arrayify(aesCtr.encrypt(privateKey));
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// Compute the message authentication code, used to check the password
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var mac = keccak256_1.keccak256(bytes_1.concat([macPrefix, ciphertext]));
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// See: https://github.com/ethereum/wiki/wiki/Web3-Secret-Storage-Definition
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var data = {
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address: account.address.substring(2).toLowerCase(),
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id: uuid_1.default.v4({ random: uuidRandom }),
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version: 3,
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Crypto: {
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cipher: "aes-128-ctr",
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cipherparams: {
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iv: bytes_1.hexlify(iv).substring(2),
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},
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ciphertext: bytes_1.hexlify(ciphertext).substring(2),
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kdf: "scrypt",
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kdfparams: {
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salt: bytes_1.hexlify(salt).substring(2),
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n: N,
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dklen: 32,
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p: p,
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r: r
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},
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mac: mac.substring(2)
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}
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};
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// If we have a mnemonic, encrypt it into the JSON wallet
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if (entropy) {
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var mnemonicIv = random_1.randomBytes(16);
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var mnemonicCounter = new aes_js_1.default.Counter(mnemonicIv);
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var mnemonicAesCtr = new aes_js_1.default.ModeOfOperation.ctr(mnemonicKey, mnemonicCounter);
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var mnemonicCiphertext = bytes_1.arrayify(mnemonicAesCtr.encrypt(entropy));
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var now = new Date();
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var timestamp = (now.getUTCFullYear() + "-" +
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utils_1.zpad(now.getUTCMonth() + 1, 2) + "-" +
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utils_1.zpad(now.getUTCDate(), 2) + "T" +
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utils_1.zpad(now.getUTCHours(), 2) + "-" +
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utils_1.zpad(now.getUTCMinutes(), 2) + "-" +
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utils_1.zpad(now.getUTCSeconds(), 2) + ".0Z");
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data["x-ethers"] = {
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client: client,
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gethFilename: ("UTC--" + timestamp + "--" + data.address),
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mnemonicCounter: bytes_1.hexlify(mnemonicIv).substring(2),
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mnemonicCiphertext: bytes_1.hexlify(mnemonicCiphertext).substring(2),
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path: path,
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version: "0.1"
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};
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}
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if (progressCallback) {
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progressCallback(1);
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}
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resolve(JSON.stringify(data));
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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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exports.encrypt = encrypt;
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