74 lines
2.2 KiB
TypeScript
74 lines
2.2 KiB
TypeScript
"use strict";
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import aes from "aes-js";
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import { ExternallyOwnedAccount } from "@ethersproject/abstract-signer";
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import { getAddress } from "@ethersproject/address";
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import { arrayify, Bytes } from "@ethersproject/bytes";
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import { keccak256 } from "@ethersproject/keccak256";
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import { pbkdf2 } from "@ethersproject/pbkdf2";
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import { toUtf8Bytes } from "@ethersproject/strings";
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import { Description } from "@ethersproject/properties";
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import { Logger } from "@ethersproject/logger";
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import { version } from "./_version";
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const logger = new Logger(version);
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import { getPassword, looseArrayify, searchPath } from "./utils";
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export class CrowdsaleAccount extends Description implements ExternallyOwnedAccount {
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readonly address: string;
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readonly privateKey: string;
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readonly mnemonic?: string;
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readonly path?: string;
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readonly _isCrowdsaleAccount: boolean;
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isCrowdsaleAccount(value: any): value is CrowdsaleAccount {
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return !!(value && value._isCrowdsaleAccount);
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}
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}
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// See: https://github.com/ethereum/pyethsaletool
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export function decrypt(json: string, password: Bytes | string): ExternallyOwnedAccount {
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let data = JSON.parse(json);
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password = getPassword(password);
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// Ethereum Address
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let ethaddr = getAddress(searchPath(data, "ethaddr"));
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// Encrypted Seed
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let encseed = looseArrayify(searchPath(data, "encseed"));
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if (!encseed || (encseed.length % 16) !== 0) {
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logger.throwArgumentError("invalid encseed", "json", json);
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}
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let key = arrayify(pbkdf2(password, password, 2000, 32, "sha256")).slice(0, 16);
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let iv = encseed.slice(0, 16);
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let encryptedSeed = encseed.slice(16);
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// Decrypt the seed
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let aesCbc = new aes.ModeOfOperation.cbc(key, iv);
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let seed = arrayify(aesCbc.decrypt(encryptedSeed));
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seed = aes.padding.pkcs7.strip(seed);
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// This wallet format is weird... Convert the binary encoded hex to a string.
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let seedHex = "";
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for (let i = 0; i < seed.length; i++) {
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seedHex += String.fromCharCode(seed[i]);
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}
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let seedHexBytes = toUtf8Bytes(seedHex);
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let privateKey = keccak256(seedHexBytes);
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return new CrowdsaleAccount ({
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_isCrowdsaleAccount: true,
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address: ethaddr,
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privateKey: privateKey
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});
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}
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