openethereum/js/packages/shared/util/signer.js
Jaco Greeff 49fdd23d58 Ui 2 move to packages/* (#6113)
* Move secureApi to shell

* Extract isTestnet test

* Use mobx + subscriptions for status

* Re-add status indicator

* Add lerna

* Move intial packages to js/packages

* Move 3rdparty/{email,sms}-verification to correct location

* Move package.json & README to library src

* Move tests for library packages

* Move views & dapps to packages

* Move i18n to root

* Move shell to actual src (main app)

* Remove ~ references

* Change ~ to root (explicit imports)

* Finalise convert of ~

* Move views into dapps as well

* Move dapps to packages/

* Fix references

* Update css

* Update test spec locations

* Update tests

* Case fix

* Skip flakey tests

* Update enzyme

* Skip previously ignored tests

* Allow empty api for hw

* Re-add theme for embed
2017-07-21 15:46:53 +02:00

109 lines
3.1 KiB
JavaScript

// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
import scrypt from 'scryptsy';
import Transaction from 'ethereumjs-tx';
import { pbkdf2Sync } from 'crypto';
import { createDecipheriv } from 'browserify-aes';
import { inHex } from '@parity/api/format/input';
import { sha3 } from '@parity/api/util/sha3';
// Adapted from https://github.com/kvhnuke/etherwallet/blob/mercury/app/scripts/myetherwallet.js
export class Signer {
static fromJson (json, password) {
return Signer
.getSeed(json, password)
.then((seed) => {
return new Signer(seed);
});
}
static getSeed (json, password) {
try {
const seed = Signer.getSyncSeed(json, password);
return Promise.resolve(seed);
} catch (error) {
return Promise.reject(error);
}
}
static getSyncSeed (json, password) {
if (json.version !== 3) {
throw new Error('Only V3 wallets are supported');
}
const { kdf } = json.crypto;
const kdfparams = json.crypto.kdfparams || {};
const pwd = Buffer.from(password);
const salt = Buffer.from(kdfparams.salt, 'hex');
let derivedKey;
if (kdf === 'scrypt') {
derivedKey = scrypt(pwd, salt, kdfparams.n, kdfparams.r, kdfparams.p, kdfparams.dklen);
} else if (kdf === 'pbkdf2') {
if (kdfparams.prf !== 'hmac-sha256') {
throw new Error('Unsupported parameters to PBKDF2');
}
derivedKey = pbkdf2Sync(pwd, salt, kdfparams.c, kdfparams.dklen, 'sha256');
} else {
throw new Error('Unsupported key derivation scheme');
}
const ciphertext = Buffer.from(json.crypto.ciphertext, 'hex');
const mac = sha3(Buffer.concat([derivedKey.slice(16, 32), ciphertext]));
if (mac !== inHex(json.crypto.mac)) {
throw new Error('Key derivation failed - possibly wrong password');
}
const decipher = createDecipheriv(
json.crypto.cipher,
derivedKey.slice(0, 16),
Buffer.from(json.crypto.cipherparams.iv, 'hex')
);
let seed = Buffer.concat([decipher.update(ciphertext), decipher.final()]);
while (seed.length < 32) {
const nullBuff = Buffer.from([0x00]);
seed = Buffer.concat([nullBuff, seed]);
}
return seed;
}
constructor (seed) {
this.seed = seed;
}
signTransactionObject (tx) {
tx.sign(this.seed);
return tx;
}
signTransaction (transaction) {
const tx = new Transaction(transaction);
return inHex(this.signTransactionObject(tx).serialize().toString('hex'));
}
}