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Protect the seed by refactoring the application as two independent pr…
…ocesses running on a microkernel.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| export default ({ BIP39, Bitcoin, crypto, ed25519, EthHd }) => { | ||
| const credentialsEntropy = ({ guid, password, sharedKey }) => | ||
| crypto.sha256(Buffer.from(guid + sharedKey + password)) | ||
|
|
||
| const entropyToSeed = entropy => | ||
| BIP39.mnemonicToSeed(BIP39.entropyToMnemonic(entropy)) | ||
|
|
||
| const deriveBIP32KeyFromSeedHex = ({ entropy, network }, path) => { | ||
| const seed = entropyToSeed(entropy) | ||
|
|
||
| return Bitcoin.HDNode.fromSeedBuffer(seed, network) | ||
| .derivePath(path) | ||
| .toBase58() | ||
| } | ||
|
|
||
| // Derivation error using seedHex directly instead of seed derived from | ||
| // mnemonic derived from seedHex | ||
| const deriveLegacyEthereumKey = ({ entropy }) => | ||
| EthHd.fromMasterSeed(entropy) | ||
| .derivePath(`m/44'/60'/0'/0/0`) | ||
| .getWallet() | ||
| .getPrivateKey() | ||
|
|
||
| const deriveSLIP10ed25519Key = async ({ entropy }, path) => { | ||
| const seed = entropyToSeed(entropy) | ||
| return ed25519.derivePath(path, seed.toString(`hex`)) | ||
| } | ||
|
|
||
| return { | ||
| credentialsEntropy, | ||
| deriveBIP32KeyFromSeedHex, | ||
| deriveLegacyEthereumKey, | ||
| deriveSLIP10ed25519Key, | ||
| entropyToSeed | ||
| } | ||
| } |
94 changes: 94 additions & 0 deletions
94
packages/blockchain-wallet-v4/src/SecurityModule/core.spec.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| import BIP39 from 'bip39' | ||
| import Bitcoin from 'bitcoinjs-lib' | ||
| import * as ed25519 from 'ed25519-hd-key' | ||
| import EthHd from 'ethereumjs-wallet/hdkey' | ||
| import * as StellarSdk from 'stellar-sdk' | ||
|
|
||
| import Core from './core' | ||
| import * as crypto from '../walletCrypto' | ||
| import { taskToPromise } from '../utils/functional' | ||
|
|
||
| const core = Core({ BIP39, Bitcoin, crypto, ed25519, EthHd, taskToPromise }) | ||
|
|
||
| it(`generates entropy from the user's credentials`, () => { | ||
| expect( | ||
| core | ||
| .credentialsEntropy({ | ||
| guid: `50dae286-e42e-4d67-8419-d5dcc563746c`, | ||
| password: `password`, | ||
| sharedKey: `b91c904b-53ab-44b1-bf79-5b60c018da15` | ||
| }) | ||
| .toString(`base64`) | ||
| ).toEqual(`jqdTiIA0jYETn9EjAGljE5697lc8kSkxod79srxfLug=`) | ||
| }) | ||
|
|
||
| it(`entropyToSeed`, () => { | ||
| expect( | ||
| core.entropyToSeed(`713a3ae074e60e56c6bd0557c4984af1`).toString(`base64`) | ||
| ).toEqual( | ||
| `5KWmMucJQ65/B2Wd8TMhYJN/rYJYchakxkMVoPs5SX7koB923atMumgUeXfzoUe2rVhMQYCOgjigf2zEtYLxhg==` | ||
| ) | ||
| }) | ||
|
|
||
| it(`derives a BIP32 key from seedHex`, async () => { | ||
| expect( | ||
| await core.deriveBIP32KeyFromSeedHex( | ||
| { | ||
| network: Bitcoin.networks.bitcoin, | ||
| entropy: `713a3ae074e60e56c6bd0557c4984af1` | ||
| }, | ||
| `m/0` | ||
| ) | ||
| ).toEqual( | ||
| `xprv9vJpjafE9tbBCPBrcv5hBq1tUP4s4d3kZRHewAkGwzjvPZ3Jm8nt9eYwoLUcjnBKdB46WZmzuoEqWLJNB2GwyfShQ1y3Pn7AoVsGYXgzabG` | ||
| ) | ||
| }) | ||
|
|
||
| // Derivation error using seedHex directly instead of seed derived from | ||
| // mnemonic derived from seedHex | ||
| it(`derives a legacy Ethereum key from seedHex`, async () => { | ||
| expect( | ||
| (await core.deriveLegacyEthereumKey({ | ||
| entropy: `e39c77ed95097f9006c34e1a843aa151` | ||
| })).toString(`hex`) | ||
| ).toEqual(`bb9c3e500b9c41ce9836619fb840436c2d98695d6dc43fb73e6e02df7ee7fc5c`) | ||
| }) | ||
|
|
||
| describe(`derives a SLIP-10 ed25519 key from the seed`, () => { | ||
| const testVectors = [ | ||
| { | ||
| seedHex: '713a3ae074e60e56c6bd0557c4984af1', | ||
| publicKey: 'GDRXE2BQUC3AZNPVFSCEZ76NJ3WWL25FYFK6RGZGIEKWE4SOOHSUJUJ6', | ||
| secret: 'SBGWSG6BTNCKCOB3DIFBGCVMUPQFYPA2G4O34RMTB343OYPXU5DJDVMN' | ||
| }, | ||
| { | ||
| seedHex: 'b781c27351c7024355cf7f0b0efdc7f85e046cf9', | ||
| publicKey: 'GAVXVW5MCK7Q66RIBWZZKZEDQTRXWCZUP4DIIFXCCENGW2P6W4OA34RH', | ||
| secret: 'SAKS7I2PNDBE5SJSUSU2XLJ7K5XJ3V3K4UDFAHMSBQYPOKE247VHAGDB' | ||
| }, | ||
| { | ||
| seedHex: | ||
| '150df9e3ab10f3f8f1428d723a6539662e181ec8781355396cec5fc2ce08d760', | ||
| publicKey: 'GC3MMSXBWHL6CPOAVERSJITX7BH76YU252WGLUOM5CJX3E7UCYZBTPJQ', | ||
| secret: 'SAEWIVK3VLNEJ3WEJRZXQGDAS5NVG2BYSYDFRSH4GKVTS5RXNVED5AX7' | ||
| }, | ||
| { | ||
| seedHex: '00000000000000000000000000000000', | ||
| publicKey: 'GB3JDWCQJCWMJ3IILWIGDTQJJC5567PGVEVXSCVPEQOTDN64VJBDQBYX', | ||
| secret: 'SBUV3MRWKNS6AYKZ6E6MOUVF2OYMON3MIUASWL3JLY5E3ISDJFELYBRZ' | ||
| } | ||
| ] | ||
|
|
||
| testVectors.forEach(({ publicKey, secret, seedHex }, index) => { | ||
| it(`test vector ${index}`, async () => { | ||
| const { key } = await core.deriveSLIP10ed25519Key( | ||
| { entropy: Buffer.from(seedHex, `hex`) }, | ||
| `m/44'/148'/0'` | ||
| ) | ||
|
|
||
| const keypair = StellarSdk.Keypair.fromRawEd25519Seed(key) | ||
| expect(keypair.publicKey()).toEqual(publicKey) | ||
| expect(keypair.secret()).toEqual(secret) | ||
| }) | ||
| }) | ||
| }) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| // Functions that require sensitive information to perform (e.g., password, | ||
| // seed, and sharedKey). Think of this module as similar to a Hardware Security | ||
| // Module. | ||
|
|
||
| import BIP39 from 'bip39' | ||
| import Bitcoin from 'bitcoinjs-lib' | ||
| import * as ed25519 from 'ed25519-hd-key' | ||
|
|
||
| import * as selectors from '../redux/wallet/selectors' | ||
| import Core from './core' | ||
| import * as types from '../types' | ||
| import { taskToPromise } from '../utils/functional' | ||
| import * as crypto from '../walletCrypto' | ||
|
|
||
| const core = Core({ BIP39, Bitcoin, crypto, ed25519 }) | ||
|
|
||
| export default ({ store }) => { | ||
| const getSeedHex = ({ secondPassword }) => { | ||
| const state = store.getState() | ||
| const wallet = selectors.getWallet(state) | ||
| return taskToPromise(types.Wallet.getSeedHex(secondPassword, wallet)) | ||
| } | ||
|
|
||
| const credentialsEntropy = ({ guid, sharedKey }) => { | ||
| const state = store.getState() | ||
| const password = selectors.getMainPassword(state) | ||
| return core.credentialsEntropy({ guid, password, sharedKey }) | ||
| } | ||
|
|
||
| const deriveBIP32Key = async ({ network, secondPassword }, path) => { | ||
| const entropy = await getSeedHex({ secondPassword }) | ||
| return core.deriveBIP32KeyFromSeedHex({ entropy, network }, path) | ||
| } | ||
|
|
||
| // Derivation error using seedHex directly instead of seed derived from | ||
| // mnemonic derived from seedHex | ||
| const deriveLegacyEthereumKey = async ({ secondPassword }) => { | ||
| const entropy = await getSeedHex({ secondPassword }) | ||
| return core.deriveLegacyEthereumKey({ entropy }) | ||
| } | ||
|
|
||
| const deriveSLIP10ed25519Key = async ({ secondPassword }, path) => { | ||
| const entropy = await getSeedHex({ secondPassword }) | ||
| return core.deriveSLIP10ed25519Key({ entropy }, path) | ||
| } | ||
|
|
||
| return { | ||
| credentialsEntropy, | ||
| deriveBIP32Key, | ||
| deriveLegacyEthereumKey, | ||
| deriveSLIP10ed25519Key | ||
| } | ||
| } |
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