55 lines
1.6 KiB
TypeScript
55 lines
1.6 KiB
TypeScript
import { CBC, pkcs7Strip } from "aes-js";
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import { getAddress } from "../address/index.js";
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import { pbkdf2 } from "../crypto/index.js";
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import { id } from "../hash/id.js";
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import { getBytes, throwArgumentError } from "../utils/index.js";
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import { getPassword, looseArrayify, spelunk } from "./utils.js";
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export interface CrowdsaleAccount {
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privateKey: string;
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address: string;
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}
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export function isCrowdsaleJson(json: string): boolean {
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try {
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const data = JSON.parse(json);
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if (data.encseed) { return true; }
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} catch (error) { }
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return false;
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}
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// See: https://github.com/ethereum/pyethsaletool
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export function decryptCrowdsaleJson(json: string, _password: string | Uint8Array): CrowdsaleAccount {
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const data = JSON.parse(json);
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const password = getPassword(_password);
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// Ethereum Address
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const address = getAddress(spelunk(data, "ethaddr:string!"));
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// Encrypted Seed
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const encseed = looseArrayify(spelunk(data, "encseed:string!"));
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if (!encseed || (encseed.length % 16) !== 0) {
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throwArgumentError("invalid encseed", "json", json);
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}
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const key = getBytes(pbkdf2(password, password, 2000, 32, "sha256")).slice(0, 16);
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const iv = encseed.slice(0, 16);
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const encryptedSeed = encseed.slice(16);
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// Decrypt the seed
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const aesCbc = new CBC(key, iv);
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const seed = pkcs7Strip(getBytes(aesCbc.decrypt(encryptedSeed)));
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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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return { address, privateKey: id(seedHex) };
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}
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