import std/[os, strutils, terminal, wordwrap], stew/byteutils, chronicles, chronos, web3, stint, json_serialization, serialization, blscurve, eth/common/eth_types, eth/keys, confutils, bearssl, spec/[datatypes, digest, crypto, keystore], conf, ssz/merkleization, network_metadata export keystore {.push raises: [Defect].} const keystoreFileName* = "keystore.json" type WalletDataForDeposits* = object mnemonic*: Mnemonic nextAccount*: Natural proc loadKeystore(conf: BeaconNodeConf|ValidatorClientConf, validatorsDir, keyName: string): Option[ValidatorPrivKey] = let keystorePath = validatorsDir / keyName / keystoreFileName keystore = try: Json.loadFile(keystorePath, Keystore) except IOError as err: error "Failed to read keystore", err = err.msg, path = keystorePath return except SerializationError as err: error "Invalid keystore", err = err.formatMsg(keystorePath) return let passphrasePath = conf.secretsDir / keyName if fileExists(passphrasePath): let passphrase = KeystorePass: try: readFile(passphrasePath) except IOError as err: error "Failed to read passphrase file", err = err.msg, path = passphrasePath return let res = decryptKeystore(keystore, passphrase) if res.isOk: return res.get.some else: error "Failed to decrypt keystore", keystorePath, passphrasePath return if conf.nonInteractive: error "Unable to load validator key store. Please ensure matching passphrase exists in the secrets dir", keyName, validatorsDir, secretsDir = conf.secretsDir return var remainingAttempts = 3 var prompt = "Please enter passphrase for key \"" & validatorsDir/keyName & "\"\n" while remainingAttempts > 0: let passphrase = KeystorePass: try: readPasswordFromStdin(prompt) except IOError: error "STDIN not readable. Cannot obtain Keystore password" return let decrypted = decryptKeystore(keystore, passphrase) if decrypted.isOk: return decrypted.get.some else: prompt = "Keystore decryption failed. Please try again" dec remainingAttempts iterator validatorKeys*(conf: BeaconNodeConf|ValidatorClientConf): ValidatorPrivKey = for validatorKeyFile in conf.validators: try: yield validatorKeyFile.load except CatchableError as err: error "Failed to load validator private key", file = validatorKeyFile.string, err = err.msg quit 1 let validatorsDir = conf.validatorsDir try: for kind, file in walkDir(validatorsDir): if kind == pcDir: let keyName = splitFile(file).name let key = loadKeystore(conf, validatorsDir, keyName) if key.isSome: yield key.get else: quit 1 except OSError as err: error "Validator keystores directory not accessible", path = validatorsDir, err = err.msg quit 1 type KeystoreGenerationError = enum RandomSourceDepleted, FailedToCreateValidatorDir FailedToCreateSecretsDir FailedToCreateSecretFile FailedToCreateKeystoreFile proc saveKeystore(rng: var BrHmacDrbgContext, validatorsDir, secretsDir: string, signingKey: ValidatorPrivKey, signingPubKey: ValidatorPubKey, signingKeyPath: KeyPath): Result[void, KeystoreGenerationError] = let keyName = $signingPubKey validatorDir = validatorsDir / keyName if not existsDir(validatorDir): var password = KeystorePass getRandomBytes(rng, 32).toHex defer: burnMem(password) let keyStore = createKeystore(kdfPbkdf2, rng, signingKey, password, signingKeyPath) keystoreFile = validatorDir / keystoreFileName try: createDir validatorDir except OSError, IOError: return err FailedToCreateValidatorDir try: createDir secretsDir except OSError, IOError: return err FailedToCreateSecretsDir try: writeFile(secretsDir / keyName, password.string) except IOError: return err FailedToCreateSecretFile try: Json.saveFile(keystoreFile, keyStore) except IOError, SerializationError: return err FailedToCreateKeystoreFile ok() proc generateDeposits*(preset: RuntimePreset, rng: var BrHmacDrbgContext, walletData: WalletDataForDeposits, totalValidators: int, validatorsDir: string, secretsDir: string): Result[seq[DepositData], KeystoreGenerationError] = var deposits: seq[DepositData] info "Generating deposits", totalValidators, validatorsDir, secretsDir let withdrawalKeyPath = makeKeyPath(0, withdrawalKeyKind) # TODO: Explain why we are using an empty password var withdrawalKey = keyFromPath(walletData.mnemonic, KeystorePass"", withdrawalKeyPath) defer: burnMem(withdrawalKey) let withdrawalPubKey = withdrawalKey.toPubKey for i in 0 ..< totalValidators: let keyStoreIdx = walletData.nextAccount + i let signingKeyPath = withdrawalKeyPath.append keyStoreIdx var signingKey = deriveChildKey(withdrawalKey, keyStoreIdx) defer: burnMem(signingKey) let signingPubKey = signingKey.toPubKey ? saveKeystore(rng, validatorsDir, secretsDir, signingKey, signingPubKey, signingKeyPath) deposits.add preset.prepareDeposit(withdrawalPubKey, signingKey, signingPubKey) ok deposits const minPasswordLen = 10 mostCommonPasswords = wordListArray( currentSourcePath.parentDir / "../vendor/nimbus-security-resources/passwords/10-million-password-list-top-100000.txt", minWordLength = minPasswordLen) proc saveWallet*(wallet: Wallet, outWalletPath: string): Result[void, string] = try: createDir splitFile(outWalletPath).dir except OSError, IOError: let e = getCurrentException() return err("failure to create wallet directory: " & e.msg) try: Json.saveFile(outWalletPath, wallet, pretty = true) except IOError as e: return err("failure to write file: " & e.msg) except SerializationError as e: # TODO: Saving a wallet should not produce SerializationErrors. # Investigate the source of this exception. return err("failure to serialize wallet: " & e.formatMsg("wallet")) ok() proc readPasswordInput(prompt: string, password: var TaintedString): bool = try: readPasswordFromStdin(prompt, password) except IOError: false proc setStyleNoError(styles: set[Style]) = when defined(windows): try: stdout.setStyle(styles) except: discard else: try: stdout.setStyle(styles) except IOError, ValueError: discard proc setForegroundColorNoError(color: ForegroundColor) = when defined(windows): try: stdout.setForegroundColor(color) except: discard else: try: stdout.setForegroundColor(color) except IOError, ValueError: discard proc resetAttributesNoError() = when defined(windows): try: stdout.resetAttributes() except: discard else: try: stdout.resetAttributes() except IOError: discard proc importKeystoresFromDir*(rng: var BrHmacDrbgContext, importedDir, validatorsDir, secretsDir: string) = var password: TaintedString defer: burnMem(password) try: for file in walkDirRec(importedDir): let ext = splitFile(file).ext if toLowerAscii(ext) != ".json": continue let keystore = try: Json.loadFile(file, Keystore) except SerializationError as e: warn "Invalid keystore", err = e.formatMsg(file) continue except IOError as e: warn "Failed to read keystore file", file, err = e.msg continue var firstDecryptionAttempt = true while true: var secret = decryptCryptoField(keystore.crypto, KeystorePass password) if secret.len == 0: if firstDecryptionAttempt: try: const msg = "Please enter the password for decrypting '$1' " & "or press ENTER to skip importing this keystore" echo msg % [file] except ValueError: raiseAssert "The format string above is correct" else: echo "The entered password was incorrect. Please try again." firstDecryptionAttempt = false if not readPasswordInput("Password: ", password): echo "System error while entering password. Please try again." if password.len == 0: break else: let privKey = ValidatorPrivKey.fromRaw(secret) if privKey.isOk: let pubKey = privKey.value.toPubKey let status = saveKeystore(rng, validatorsDir, secretsDir, privKey.value, pubKey, keystore.path) if status.isOk: info "Keystore imported", file else: error "Failed to import keystore", file, err = status.error else: error "Imported keystore holds invalid key", file, err = privKey.error break except OSError: fatal "Failed to access the imported deposits directory" quit 1 proc createWalletInteractively*( rng: var BrHmacDrbgContext, conf: BeaconNodeConf): Result[WalletDataForDeposits, string] = if conf.nonInteractive: return err "not running in interactive mode" var mnemonic = generateMnemonic(rng) defer: burnMem(mnemonic) template ask(prompt: string): string = try: stdout.write prompt, ": " stdin.readLine() except IOError: return err "failure to read data from stdin" template echo80(msg: string) = echo wrapWords(msg, 80) echo80 "The generated wallet is uniquely identified by a seed phrase " & "consisting of 24 words. In case you lose your wallet and you " & "need to restore it on a different machine, you must use the " & "words displayed below:" try: echo "" setStyleNoError({styleBright}) setForegroundColorNoError fgCyan echo80 $mnemonic resetAttributesNoError() echo "" except IOError, ValueError: return err "failure to write to the standard output" echo80 "Please back up the seed phrase now to a safe location as " & "if you are protecting a sensitive password. The seed phrase " & "can be used to withdrawl funds from your wallet." echo "" echo "Did you back up your seed recovery phrase?\p" & "(please type 'yes' to continue or press enter to quit)" while true: let answer = ask "Answer" if answer == "": return err "aborted wallet creation" elif answer != "yes": echo "To continue, please type 'yes' (without the quotes) or press enter to quit" else: break echo "" echo80 "When you perform operations with your wallet such as withdrawals " & "and additional deposits, you'll be asked to enter a password. " & "Please note that this password is local to the current Nimbus " & "installation and can be changed at any time." echo "" while true: var password, confirmedPassword: TaintedString try: var firstTry = true template prompt: string = if firstTry: "Please enter a password:" else: "Please enter a new password:" while true: if not readPasswordInput(prompt, password): return err "failure to read a password from stdin" if password.len < minPasswordLen: try: echo "The entered password should be at least $1 characters." % [$minPasswordLen] except ValueError as err: raiseAssert "The format string above is correct" elif password in mostCommonPasswords: echo80 "The entered password is too commonly used and it would be easy " & "to brute-force with automated tools." else: break firstTry = false if not readPasswordInput("Please repeat the password:", confirmedPassword): return err "failure to read a password from stdin" if password != confirmedPassword: echo "Passwords don't match, please try again" continue var name: WalletName let outWalletName = conf.outWalletName if outWalletName.isSome: name = outWalletName.get else: echo "" echo80 "For your convenience, the wallet can be identified with a name " & "of your choice. Please enter a wallet name below or press ENTER " & "to continue with a machine-generated name." while true: var enteredName = ask "Wallet name" if enteredName.len > 0: name = try: WalletName.parseCmdArg(enteredName) except CatchableError as err: echo err.msg & ". Please try again." continue break let wallet = createWallet(kdfPbkdf2, rng, mnemonic, name = name, password = KeystorePass password) let outWalletFileFlag = conf.outWalletFile let outWalletFile = if outWalletFileFlag.isSome: string outWalletFileFlag.get else: conf.walletsDir / addFileExt(string wallet.uuid, "json") let status = saveWallet(wallet, outWalletFile) if status.isErr: return err("failure to create wallet file due to " & status.error) info "Wallet file written", path = outWalletFile return ok WalletDataForDeposits(mnemonic: mnemonic, nextAccount: 0) finally: burnMem(password) burnMem(confirmedPassword) proc loadWallet*(fileName: string): Result[Wallet, string] = try: ok Json.loadFile(fileName, Wallet) except CatchableError as e: err e.msg proc unlockWalletInteractively*(wallet: Wallet): Result[WalletDataForDeposits, string] = echo "Please enter the password for unlocking the wallet" for i in 1..3: var password: TaintedString try: if not readPasswordInput("Password: ", password): return err "failure to read password from stdin" var secret = decryptCryptoField(wallet.crypto, KeystorePass password) if secret.len > 0: defer: burnMem(secret) return ok WalletDataForDeposits( mnemonic: Mnemonic string.fromBytes(secret)) else: echo "Unlocking of the wallet failed. Please try again." finally: burnMem(password) return err "failure to unlock wallet" proc findWallet*(config: BeaconNodeConf, name: WalletName): Result[Wallet, string] = var walletFiles = newSeq[string]() try: for kind, walletFile in walkDir(config.walletsDir): if kind != pcFile: continue let fullPath = config.walletsDir / walletFile if walletFile == name.string: return loadWallet(fullPath) walletFiles.add fullPath except OSError: return err "failure to list wallet directory" for walletFile in walletFiles: let wallet = loadWallet(walletFile) if wallet.isOk and wallet.get.name == name: return wallet return err "failure to locate wallet file" type # This is not particularly well-standardized yet. # Some relevant code for generating (1) and validating (2) the data can be found below: # 1) https://github.com/ethereum/eth2.0-deposit-cli/blob/dev/eth2deposit/credentials.py # 2) https://github.com/ethereum/eth2.0-deposit/blob/dev/src/pages/UploadValidator/validateDepositKey.ts LaunchPadDeposit* = object pubkey*: ValidatorPubKey withdrawal_credentials*: Eth2Digest amount*: Gwei signature*: ValidatorSig deposit_message_root*: Eth2Digest deposit_data_root*: Eth2Digest fork_version*: Version func init*(T: type LaunchPadDeposit, preset: RuntimePreset, d: DepositData): T = T(pubkey: d.pubkey, withdrawal_credentials: d.withdrawal_credentials, amount: d.amount, signature: d.signature, deposit_message_root: hash_tree_root(d as DepositMessage), deposit_data_root: hash_tree_root(d), fork_version: preset.GENESIS_FORK_VERSION) func `as`*(copied: LaunchPadDeposit, T: type DepositData): T = T(pubkey: copied.pubkey, withdrawal_credentials: copied.withdrawal_credentials, amount: copied.amount, signature: copied.signature)