nimbus-eth2/beacon_chain/validators/keystore_management.nim

1990 lines
69 KiB
Nim

# beacon_chain
# Copyright (c) 2018-2023 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
{.push raises: [].}
import
std/[os, strutils, terminal, wordwrap, unicode],
chronicles, chronos, json_serialization, zxcvbn,
bearssl/rand,
serialization, blscurve, eth/common/eth_types, eth/keys, confutils,
nimbus_security_resources,
".."/spec/[eth2_merkleization, keystore, crypto],
".."/spec/datatypes/base,
stew/io2, libp2p/crypto/crypto as lcrypto,
nimcrypto/utils as ncrutils,
".."/[conf, filepath, beacon_clock],
".."/networking/network_metadata,
./validator_pool
export
keystore, validator_pool, crypto, rand
when defined(windows):
import stew/[windows/acl]
{.localPassC: "-fno-lto".} # no LTO for crypto
const
KeystoreFileName* = "keystore.json"
RemoteKeystoreFileName* = "remote_keystore.json"
NetKeystoreFileName* = "network_keystore.json"
FeeRecipientFilename* = "suggested_fee_recipient.hex"
GasLimitFilename* = "suggested_gas_limit.json"
KeyNameSize* = 98 # 0x + hexadecimal key representation 96 characters.
MaxKeystoreFileSize* = 65536
type
WalletPathPair* = object
wallet*: Wallet
path*: string
CreatedWallet* = object
walletPath*: WalletPathPair
seed*: KeySeed
KmResult*[T] = Result[T, cstring]
AnyKeystore* = RemoteKeystore | Keystore
RemoveValidatorStatus* {.pure.} = enum
deleted = "Deleted"
notFound = "Not found"
AddValidatorStatus* {.pure.} = enum
existingArtifacts = "Keystore artifacts already exists"
failed = "Validator not added"
AddValidatorFailure* = object
status*: AddValidatorStatus
message*: string
ImportResult*[T] = Result[T, AddValidatorFailure]
ValidatorPubKeyToDataFn* =
proc (pubkey: ValidatorPubKey): Opt[ValidatorAndIndex]
{.raises: [Defect], gcsafe.}
KeymanagerHost* = object
validatorPool*: ref ValidatorPool
rng*: ref HmacDrbgContext
keymanagerToken*: string
validatorsDir*: string
secretsDir*: string
defaultFeeRecipient*: Eth1Address
defaultGasLimit*: uint64
getValidatorAndIdxFn*: ValidatorPubKeyToDataFn
getBeaconTimeFn*: GetBeaconTimeFn
const
minPasswordLen = 12
minPasswordEntropy = 60.0
mostCommonPasswords = wordListArray(
nimbusSecurityResourcesPath /
"passwords" / "10-million-password-list-top-100000.txt",
minWordLen = minPasswordLen)
func init*(T: type KeymanagerHost,
validatorPool: ref ValidatorPool,
rng: ref HmacDrbgContext,
keymanagerToken: string,
validatorsDir: string,
secretsDir: string,
defaultFeeRecipient: Eth1Address,
defaultGasLimit: uint64,
getValidatorAndIdxFn: ValidatorPubKeyToDataFn,
getBeaconTimeFn: GetBeaconTimeFn): T =
T(validatorPool: validatorPool,
rng: rng,
keymanagerToken: keymanagerToken,
validatorsDir: validatorsDir,
secretsDir: secretsDir,
defaultFeeRecipient: defaultFeeRecipient,
defaultGasLimit: defaultGasLimit,
getValidatorAndIdxFn: getValidatorAndIdxFn,
getBeaconTimeFn: getBeaconTimeFn)
proc echoP*(msg: string) =
## Prints a paragraph aligned to 80 columns
echo ""
echo wrapWords(msg, 80)
func init*(T: type KeystoreData,
privateKey: ValidatorPrivKey,
keystore: Keystore, handle: FileLockHandle): T {.raises: [Defect].} =
KeystoreData(
kind: KeystoreKind.Local,
privateKey: privateKey,
description: keystore.description,
path: keystore.path,
uuid: keystore.uuid,
handle: handle,
version: uint64(keystore.version),
pubkey: privateKey.toPubKey().toPubKey()
)
func init*(T: type KeystoreData, keystore: RemoteKeystore,
handle: FileLockHandle): Result[T, cstring] {.raises: [Defect].} =
let cookedKey = keystore.pubkey.load().valueOr:
return err("Invalid validator's public key")
ok(KeystoreData(
kind: KeystoreKind.Remote,
handle: handle,
pubkey: cookedKey.toPubKey,
description: keystore.description,
version: keystore.version,
remotes: keystore.remotes,
threshold: keystore.threshold
))
func init*(T: type KeystoreData, cookedKey: CookedPubKey,
remotes: seq[RemoteSignerInfo], threshold: uint32,
handle: FileLockHandle): T =
KeystoreData(
kind: KeystoreKind.Remote,
handle: handle,
pubkey: cookedKey.toPubKey(),
version: 2'u64,
remotes: remotes,
threshold: threshold,
)
func init(T: type AddValidatorFailure, status: AddValidatorStatus,
msg = ""): AddValidatorFailure {.raises: [Defect].} =
AddValidatorFailure(status: status, message: msg)
func toKeystoreKind*(kind: ValidatorKind): KeystoreKind {.raises: [Defect].} =
case kind
of ValidatorKind.Local:
KeystoreKind.Local
of ValidatorKind.Remote:
KeystoreKind.Remote
proc checkAndCreateDataDir*(dataDir: string): bool =
when defined(posix):
let requiredPerms = 0o700
if isDir(dataDir):
let currPermsRes = getPermissions(dataDir)
if currPermsRes.isErr():
fatal "Could not check data directory permissions",
data_dir = dataDir, errorCode = $currPermsRes.error,
errorMsg = ioErrorMsg(currPermsRes.error)
return false
else:
let currPerms = currPermsRes.get()
if currPerms != requiredPerms:
warn "Data directory has insecure permissions. Correcting them.",
data_dir = dataDir,
current_permissions = currPerms.toOct(4),
required_permissions = requiredPerms.toOct(4)
let newPermsRes = setPermissions(dataDir, requiredPerms)
if newPermsRes.isErr():
fatal "Could not set data directory permissions",
data_dir = dataDir,
errorCode = $newPermsRes.error,
errorMsg = ioErrorMsg(newPermsRes.error),
old_permissions = currPerms.toOct(4),
new_permissions = requiredPerms.toOct(4)
return false
else:
if (let res = secureCreatePath(dataDir); res.isErr):
fatal "Could not create data directory",
path = dataDir, err = ioErrorMsg(res.error), errorCode = $res.error
return false
elif defined(windows):
let amask = {AccessFlags.Read, AccessFlags.Write, AccessFlags.Execute}
if fileAccessible(dataDir, amask):
let cres = checkCurrentUserOnlyACL(dataDir)
if cres.isErr():
fatal "Could not check data folder's ACL",
path = dataDir, errorCode = $cres.error,
errorMsg = ioErrorMsg(cres.error)
return false
else:
if cres.get() == false:
fatal "Data folder has insecure ACL", path = dataDir
return false
else:
if (let res = secureCreatePath(dataDir); res.isErr):
fatal "Could not create data folder",
path = dataDir, err = ioErrorMsg(res.error), errorCode = $res.error
return false
else:
fatal "Unsupported operation system"
return false
return true
proc checkSensitivePathPermissions*(dirFilePath: string): bool =
## If ``dirFilePath`` is file, then check if file has only
##
## - "(600) rwx------" permissions on Posix (Linux, MacOS, BSD)
## - current user only ACL on Windows
##
## If ``dirFilePath`` is directory, then check if directory has only
##
## - "(700) rwx------" permissions on Posix (Linux, MacOS, BSD)
## - current user only ACL on Windows
##
## Procedure returns ``true`` if directory/file is present and all required
## permissions are set.
let r1 = isDir(dirFilePath)
let r2 = isFile(dirFilePath)
if r1 or r2:
when defined(windows):
let res = checkCurrentUserOnlyACL(dirFilePath)
if res.isErr():
false
else:
if res.get() == false:
false
else:
true
else:
let requiredPermissions = if r1: 0o700 else: 0o600
let res = getPermissions(dirFilePath)
if res.isErr():
false
else:
if res.get() != requiredPermissions:
false
else:
true
else:
false
proc checkSensitiveFilePermissions*(filePath: string): bool =
## Check if ``filePath`` has only "(600) rw-------" permissions.
## Procedure returns ``false`` if permissions are different and we can't
## correct them.
when defined(windows):
let cres = checkCurrentUserOnlyACL(filePath)
if cres.isErr():
fatal "Could not check file's ACL",
key_path = filePath, errorCode = $cres.error,
errorMsg = ioErrorMsg(cres.error)
return false
else:
if cres.get() == false:
fatal "File has insecure permissions", key_path = filePath
return false
else:
let requiredPerms = 0o600
let currPermsRes = getPermissions(filePath)
if currPermsRes.isErr():
error "Could not check file permissions",
key_path = filePath, errorCode = $currPermsRes.error,
errorMsg = ioErrorMsg(currPermsRes.error)
return false
else:
let currPerms = currPermsRes.get()
if currPerms != requiredPerms:
warn "File has insecure permissions. Correcting them.",
key_path = filePath,
current_permissions = currPerms.toOct(4),
required_permissions = requiredPerms.toOct(4)
let newPermsRes = setPermissions(filePath, requiredPerms)
if newPermsRes.isErr():
fatal "Could not set data directory permissions",
key_path = filePath,
errorCode = $newPermsRes.error,
errorMsg = ioErrorMsg(newPermsRes.error),
old_permissions = currPerms.toOct(4),
new_permissions = requiredPerms.toOct(4)
return false
return true
proc keyboardCreatePassword(prompt: string,
confirm: string,
allowEmpty = false): KsResult[string] =
while true:
let password =
try:
readPasswordFromStdin(prompt)
except IOError:
error "Could not read password from stdin"
return err("Could not read password from stdin")
if password.len == 0 and allowEmpty:
return ok("")
# We treat `password` as UTF-8 encoded string.
if validateUtf8(password) == -1:
if runeLen(password) < minPasswordLen:
echoP "The entered password should be at least " & $minPasswordLen &
" characters."
echo ""
continue
elif passwordEntropy(password) < minPasswordEntropy:
echoP "The entered password has low entropy and may be easy to " &
"brute-force with automated tools. Please increase the " &
"variety of the user characters."
continue
elif cstring(password) in mostCommonPasswords:
echoP "The entered password is too commonly used and it would be " &
"easy to brute-force with automated tools."
echo ""
continue
else:
echoP "Entered password is not valid UTF-8 string"
echo ""
continue
let confirmedPassword =
try:
readPasswordFromStdin(confirm)
except IOError:
error "Could not read password from stdin"
return err("Could not read password from stdin")
if password != confirmedPassword:
echo "Passwords don't match, please try again\n"
continue
return ok(password)
proc keyboardGetPassword[T](prompt: string, attempts: int,
pred: proc(p: string): KsResult[T] {.
gcsafe, raises: [Defect].}): KsResult[T] =
var
remainingAttempts = attempts
counter = 1
while remainingAttempts > 0:
let passphrase =
try:
readPasswordFromStdin(prompt)
except IOError:
error "Could not read password from stdin"
return
os.sleep(1000 * counter)
let res = pred(passphrase)
if res.isOk():
return res
else:
inc(counter)
dec(remainingAttempts)
err("Failed to decrypt keystore")
proc loadSecretFile*(path: string): KsResult[KeystorePass] {.
raises: [Defect].} =
let res = readAllChars(path)
if res.isErr():
return err(ioErrorMsg(res.error()))
ok(KeystorePass.init(res.get()))
proc loadRemoteKeystoreImpl(validatorsDir,
keyName: string): Opt[KeystoreData] =
let keystorePath = validatorsDir / keyName / RemoteKeystoreFileName
if not(checkSensitiveFilePermissions(keystorePath)):
error "Remote keystorage file has insecure permissions",
key_path = keystorePath
return Opt.none(KeystoreData)
let handle =
block:
let res = openLockedFile(keystorePath)
if res.isErr():
error "Unable to lock keystore file", key_path = keystorePath,
error_msg = ioErrorMsg(res.error())
return Opt.none(KeystoreData)
res.get()
var success = false
defer:
if not(success):
discard handle.closeLockedFile()
let keystore =
block:
let gres = handle.getData(MaxKeystoreFileSize)
if gres.isErr():
error "Could not read remote keystore file", key_path = keystorePath,
error_msg = ioErrorMsg(gres.error())
return Opt.none(KeystoreData)
let buffer = gres.get()
let data =
try:
parseRemoteKeystore(buffer)
except SerializationError as e:
error "Invalid remote keystore file", key_path = keystorePath,
error_msg = e.formatMsg(keystorePath)
return Opt.none(KeystoreData)
let kres = KeystoreData.init(data, handle)
if kres.isErr():
error "Invalid remote keystore file", key_path = keystorePath,
error_msg = kres.error()
return Opt.none(KeystoreData)
kres.get()
success = true
Opt.some(keystore)
proc loadLocalKeystoreImpl(validatorsDir, secretsDir, keyName: string,
nonInteractive: bool,
cache: KeystoreCacheRef): Opt[KeystoreData] =
let
keystorePath = validatorsDir / keyName / KeystoreFileName
passphrasePath = secretsDir / keyName
handle =
block:
let res = openLockedFile(keystorePath)
if res.isErr():
error "Unable to lock keystore file", key_path = keystorePath,
error_msg = ioErrorMsg(res.error())
return Opt.none(KeystoreData)
res.get()
var success = false
defer:
if not(success):
discard handle.closeLockedFile()
let
keystore =
block:
let gres = handle.getData(MaxKeystoreFileSize)
if gres.isErr():
error "Could not read local keystore file", key_path = keystorePath,
error_msg = ioErrorMsg(gres.error())
return Opt.none(KeystoreData)
let buffer = gres.get()
let data =
try:
parseKeystore(buffer)
except SerializationError as e:
error "Invalid local keystore file", key_path = keystorePath,
error_msg = e.formatMsg(keystorePath)
return Opt.none(KeystoreData)
data
if fileExists(passphrasePath):
if not(checkSensitiveFilePermissions(passphrasePath)):
error "Password file has insecure permissions", key_path = keystorePath
return Opt.none(KeystoreData)
let passphrase =
block:
let res = loadSecretFile(passphrasePath)
if res.isErr():
error "Failed to read passphrase file", error_msg = res.error(),
path = passphrasePath
return Opt.none(KeystoreData)
res.get()
let res = decryptKeystore(keystore, passphrase, cache)
if res.isOk():
success = true
return Opt.some(KeystoreData.init(res.get(), keystore, handle))
else:
error "Failed to decrypt keystore", key_path = keystorePath,
secure_path = passphrasePath
return Opt.none(KeystoreData)
if nonInteractive:
error "Unable to load validator key store. Please ensure matching " &
"passphrase exists in the secrets dir", key_path = keystorePath,
key_name = keyName, validatorsDir, secretsDir = secretsDir
return Opt.none(KeystoreData)
let prompt = "Please enter passphrase for key \"" &
(validatorsDir / keyName) & "\": "
let res = keyboardGetPassword[ValidatorPrivKey](prompt, 3,
proc (password: string): KsResult[ValidatorPrivKey] =
let decrypted = decryptKeystore(keystore, KeystorePass.init password,
cache)
if decrypted.isErr():
error "Keystore decryption failed. Please try again",
keystore_path = keystorePath
decrypted
)
if res.isErr():
return Opt.none(KeystoreData)
success = true
Opt.some(KeystoreData.init(res.get(), keystore, handle))
proc loadKeystore*(validatorsDir, secretsDir, keyName: string,
nonInteractive: bool,
cache: KeystoreCacheRef): Opt[KeystoreData] =
let
keystorePath = validatorsDir / keyName
localKeystorePath = keystorePath / KeystoreFileName
remoteKeystorePath = keystorePath / RemoteKeystoreFileName
if fileExists(localKeystorePath):
loadLocalKeystoreImpl(validatorsDir, secretsDir, keyName, nonInteractive,
cache)
elif fileExists(remoteKeystorePath):
loadRemoteKeystoreImpl(validatorsDir, keyName)
else:
error "Unable to find any keystore files", keystorePath
Opt.none(KeystoreData)
proc removeValidatorFiles*(validatorsDir, secretsDir, keyName: string,
kind: KeystoreKind
): KmResult[RemoveValidatorStatus] {.
raises: [Defect].} =
let
keystoreDir = validatorsDir / keyName
keystoreFile =
case kind
of KeystoreKind.Local:
keystoreDir / KeystoreFileName
of KeystoreKind.Remote:
keystoreDir / RemoteKeystoreFileName
secretFile = secretsDir / keyName
if not(dirExists(keystoreDir)):
return ok(RemoveValidatorStatus.notFound)
if not(fileExists(keystoreFile)):
return ok(RemoveValidatorStatus.notFound)
case kind
of KeystoreKind.Local:
block:
let res = io2.removeFile(keystoreFile)
if res.isErr():
return err("Could not remove keystore file")
block:
let res = io2.removeFile(secretFile)
if res.isErr() and fileExists(secretFile):
return err("Could not remove password file")
# We remove folder with all subfolders and files inside.
try:
removeDir(keystoreDir, false)
except OSError:
return err("Could not remove keystore directory")
of KeystoreKind.Remote:
block:
let res = io2.removeFile(keystoreFile)
if res.isErr():
return err("Could not remove keystore file")
# We remove folder with all subfolders and files inside.
try:
removeDir(keystoreDir, false)
except OSError:
return err("Could not remove keystore directory")
ok(RemoveValidatorStatus.deleted)
func fsName(pubkey: ValidatorPubKey|CookedPubKey): string =
"0x" & pubkey.toHex()
proc removeValidator*(pool: var ValidatorPool,
validatorsDir, secretsDir: string,
publicKey: ValidatorPubKey,
kind: KeystoreKind): KmResult[RemoveValidatorStatus] {.
raises: [Defect].} =
let validator = pool.getValidator(publicKey).valueOr:
return ok(RemoveValidatorStatus.notFound)
if validator.kind.toKeystoreKind() != kind:
return ok(RemoveValidatorStatus.notFound)
let cres = validator.data.handle.closeLockedFile()
if cres.isErr():
return err("Could not unlock validator keystore file")
let res = removeValidatorFiles(validatorsDir, secretsDir, publicKey.fsName, kind)
if res.isErr():
return err(res.error())
pool.removeValidator(publicKey)
ok(res.value())
proc checkKeyName*(keyName: string): bool =
const keyAlphabet = {'a'..'f', 'A'..'F', '0'..'9'}
if len(keyName) != KeyNameSize:
return false
if keyName[0] != '0' and keyName[1] != 'x':
return false
for index in 2 ..< len(keyName):
if keyName[index] notin keyAlphabet:
return false
true
proc existsKeystore*(keystoreDir: string, keyKind: KeystoreKind): bool {.
raises: [Defect].} =
case keyKind
of KeystoreKind.Local:
fileExists(keystoreDir / KeystoreFileName)
of KeystoreKind.Remote:
fileExists(keystoreDir / RemoteKeystoreFileName)
proc existsKeystore*(keystoreDir: string,
keysMask: set[KeystoreKind]): bool {.raises: [Defect].} =
if KeystoreKind.Local in keysMask:
if existsKeystore(keystoreDir, KeystoreKind.Local):
return true
if KeystoreKind.Remote in keysMask:
if existsKeystore(keystoreDir, KeystoreKind.Remote):
return true
false
iterator listLoadableKeys*(validatorsDir, secretsDir: string,
keysMask: set[KeystoreKind]): CookedPubKey =
try:
for kind, file in walkDir(validatorsDir):
if kind == pcDir:
let
keyName = splitFile(file).name
keystoreDir = validatorsDir / keyName
if not(checkKeyName(keyName)):
# Skip folders which name do not satisfy "0x[a-fA-F0-9]{96, 96}".
continue
if not(existsKeystore(keystoreDir, keysMask)):
# Skip folder which do not satisfy `keysMask`.
continue
let kres = ValidatorPubKey.fromHex(keyName)
if kres.isErr():
# Skip folders which could not be decoded to ValidatorPubKey.
continue
let publicKey = kres.get()
let cres = publicKey.load().valueOr:
# Skip folders which has invalid ValidatorPubKey
# (point is not on curve).
continue
yield cres
except OSError as err:
error "Validator keystores directory not accessible",
path = validatorsDir, err = err.msg
quit 1
iterator listLoadableKeystores*(validatorsDir, secretsDir: string,
nonInteractive: bool,
keysMask: set[KeystoreKind],
cache: KeystoreCacheRef): KeystoreData =
try:
for kind, file in walkDir(validatorsDir):
if kind == pcDir:
let
keyName = splitFile(file).name
keystoreDir = validatorsDir / keyName
keystoreFile = keystoreDir / KeystoreFileName
if not(checkKeyName(keyName)):
# Skip folders which name do not satisfy "0x[a-fA-F0-9]{96, 96}".
continue
if not(existsKeystore(keystoreDir, keysMask)):
# Skip folders which do not have keystore file inside.
continue
let
secretFile = secretsDir / keyName
keystore = loadKeystore(validatorsDir, secretsDir, keyName,
nonInteractive, cache).valueOr:
fatal "Unable to load keystore", keystore = file
quit 1
yield keystore
except OSError as err:
error "Validator keystores directory not accessible",
path = validatorsDir, err = err.msg
quit 1
iterator listLoadableKeystores*(config: AnyConf,
cache: KeystoreCacheRef): KeystoreData =
for el in listLoadableKeystores(config.validatorsDir(),
config.secretsDir(),
config.nonInteractive,
{KeystoreKind.Local, KeystoreKind.Remote},
cache):
yield el
type
ValidatorConfigFileStatus* = enum
noSuchValidator
malformedConfigFile
func validatorKeystoreDir(
validatorsDir: string, pubkey: ValidatorPubKey): string =
validatorsDir / pubkey.fsName
func feeRecipientPath(validatorsDir: string,
pubkey: ValidatorPubKey): string =
validatorsDir.validatorKeystoreDir(pubkey) / FeeRecipientFilename
func gasLimitPath(validatorsDir: string,
pubkey: ValidatorPubKey): string =
validatorsDir.validatorKeystoreDir(pubkey) / GasLimitFilename
proc getSuggestedFeeRecipient*(
validatorsDir: string,
pubkey: ValidatorPubKey,
defaultFeeRecipient: Eth1Address): Result[Eth1Address, ValidatorConfigFileStatus] =
# In this particular case, an error might be by design. If the file exists,
# but doesn't load or parse that's a more urgent matter to fix. Many people
# people might prefer, however, not to override their default suggested fee
# recipients per validator, so don't warn very loudly, if at all.
if not dirExists(validatorsDir.validatorKeystoreDir(pubkey)):
return err noSuchValidator
let feeRecipientPath = validatorsDir.feeRecipientPath(pubkey)
if not fileExists(feeRecipientPath):
return ok defaultFeeRecipient
try:
# Avoid being overly flexible initially. Trailing whitespace is common
# enough it probably should be allowed, but it is reasonable to simply
# disallow the mostly-pointless flexibility of leading whitespace.
ok Eth1Address.fromHex(strutils.strip(
readFile(feeRecipientPath), leading = false, trailing = true))
except CatchableError as exc:
# Because the nonexistent validator case was already checked, any failure
# at this point is serious enough to alert the user.
warn "Failed to load fee recipient file; falling back to default fee recipient",
feeRecipientPath, defaultFeeRecipient,
err = exc.msg
err malformedConfigFile
proc getSuggestedGasLimit*(
validatorsDir: string,
pubkey: ValidatorPubKey,
defaultGasLimit: uint64): Result[uint64, ValidatorConfigFileStatus] =
# In this particular case, an error might be by design. If the file exists,
# but doesn't load or parse that's a more urgent matter to fix. Many people
# people might prefer, however, not to override their default suggested gas
# limit per validator, so don't warn very loudly, if at all.
if not dirExists(validatorsDir.validatorKeystoreDir(pubkey)):
return err noSuchValidator
let gasLimitPath = validatorsDir.gasLimitPath(pubkey)
if not fileExists(gasLimitPath):
return ok defaultGasLimit
try:
ok parseBiggestUInt(strutils.strip(
readFile(gasLimitPath), leading = false, trailing = true))
except SerializationError as e:
warn "Invalid local gas limit file", gasLimitPath,
err= e.formatMsg(gasLimitPath)
err malformedConfigFile
except CatchableError as exc:
warn "Failed to load gas limit file; falling back to default gas limit",
gasLimitPath, defaultGasLimit,
err = exc.msg
err malformedConfigFile
type
KeystoreGenerationErrorKind* = enum
FailedToCreateValidatorsDir
FailedToCreateKeystoreDir
FailedToCreateSecretsDir
FailedToCreateSecretFile
FailedToCreateKeystoreFile
DuplicateKeystoreDir
DuplicateKeystoreFile
KeystoreGenerationError* = object
case kind*: KeystoreGenerationErrorKind
of FailedToCreateKeystoreDir,
FailedToCreateValidatorsDir,
FailedToCreateSecretsDir,
FailedToCreateSecretFile,
FailedToCreateKeystoreFile,
DuplicateKeystoreDir,
DuplicateKeystoreFile:
error*: string
proc mapErrTo*[T, E](r: Result[T, E], v: static KeystoreGenerationErrorKind):
Result[T, KeystoreGenerationError] =
r.mapErr(proc (e: E): KeystoreGenerationError =
KeystoreGenerationError(kind: v, error: $e))
proc loadNetKeystore*(keystorePath: string,
insecurePwd: Option[string]): Opt[lcrypto.PrivateKey] =
if not(checkSensitiveFilePermissions(keystorePath)):
error "Network keystorage file has insecure permissions",
key_path = keystorePath
return
let keyStore =
try:
Json.loadFile(keystorePath, NetKeystore,
requireAllFields = true,
allowUnknownFields = true)
except IOError as err:
error "Failed to read network keystore", err = err.msg,
path = keystorePath
return
except SerializationError as err:
error "Invalid network keystore", err = err.formatMsg(keystorePath)
return
if insecurePwd.isSome():
warn "Using insecure password to unlock networking key"
let decrypted = decryptNetKeystore(keyStore,
KeystorePass.init(insecurePwd.get()))
if decrypted.isOk:
return ok(decrypted.get())
else:
error "Network keystore decryption failed", key_store = keystorePath
return
else:
let prompt = "Please enter passphrase to unlock networking key: "
let res = keyboardGetPassword[lcrypto.PrivateKey](prompt, 3,
proc (password: string): KsResult[lcrypto.PrivateKey] =
let decrypted = decryptNetKeystore(keyStore, KeystorePass.init password)
if decrypted.isErr():
error "Keystore decryption failed. Please try again", keystorePath
decrypted
)
if res.isOk():
ok(res.get())
else:
return
proc saveNetKeystore*(rng: var HmacDrbgContext, keystorePath: string,
netKey: lcrypto.PrivateKey, insecurePwd: Option[string]
): Result[void, KeystoreGenerationError] =
let password =
if insecurePwd.isSome():
warn "Using insecure password to lock networking key",
key_path = keystorePath
insecurePwd.get()
else:
let prompt = "Please enter NEW password to lock network key storage: "
let confirm = "Please confirm, network key storage password: "
? keyboardCreatePassword(prompt, confirm).mapErrTo(
FailedToCreateKeystoreFile)
let keyStore = createNetKeystore(kdfScrypt, rng, netKey,
KeystorePass.init password)
var encodedStorage: string
try:
encodedStorage = Json.encode(keyStore)
except SerializationError as exc:
error "Could not serialize network key storage", key_path = keystorePath
return err(KeystoreGenerationError(
kind: FailedToCreateKeystoreFile, error: exc.msg))
let res = secureWriteFile(keystorePath, encodedStorage)
if res.isOk():
ok()
else:
error "Could not write to network key storage file",
key_path = keystorePath
res.mapErrTo(FailedToCreateKeystoreFile)
proc createLocalValidatorFiles*(
secretsDir, validatorsDir, keystoreDir,
secretFile, passwordAsString, keystoreFile,
encodedStorage: string
): Result[void, KeystoreGenerationError] {.raises: [Defect].} =
var
success = false # becomes true when everything is created successfully
cleanupSecretsDir = true # becomes false if secretsDir already existed
cleanupValidatorsDir = true # becomes false if validatorsDir already existed
# secretsDir:
let secretsDirExisted: bool = dirExists(secretsDir)
if not(secretsDirExisted):
? secureCreatePath(secretsDir).mapErrTo(FailedToCreateSecretsDir)
defer:
if not (success or secretsDirExisted):
discard io2.removeDir(secretsDir)
# validatorsDir:
let validatorsDirExisted: bool = dirExists(validatorsDir)
if not(validatorsDirExisted):
? secureCreatePath(validatorsDir).mapErrTo(FailedToCreateValidatorsDir)
defer:
if not (success or validatorsDirExisted):
discard io2.removeDir(validatorsDir)
# keystoreDir:
? secureCreatePath(keystoreDir).mapErrTo(FailedToCreateKeystoreDir)
defer:
if not success:
discard io2.removeDir(keystoreDir)
# secretFile:
? secureWriteFile(secretFile,
passwordAsString).mapErrTo(FailedToCreateSecretFile)
defer:
if not success:
discard io2.removeFile(secretFile)
# keystoreFile:
? secureWriteFile(keystoreFile,
encodedStorage).mapErrTo(FailedToCreateKeystoreFile)
success = true
ok()
proc createLockedLocalValidatorFiles*(
secretsDir, validatorsDir, keystoreDir,
secretFile, passwordAsString, keystoreFile,
encodedStorage: string
): Result[FileLockHandle, KeystoreGenerationError] {.raises: [Defect].} =
var
success = false # becomes true when everything is created successfully
cleanupSecretsDir = true # becomes false if secretsDir already existed
cleanupValidatorsDir = true # becomes false if validatorsDir already existed
# secretsDir:
let secretsDirExisted: bool = dirExists(secretsDir)
if not(secretsDirExisted):
? secureCreatePath(secretsDir).mapErrTo(FailedToCreateSecretsDir)
defer:
if not (success or secretsDirExisted):
discard io2.removeDir(secretsDir)
# validatorsDir:
let validatorsDirExisted: bool = dirExists(validatorsDir)
if not(validatorsDirExisted):
? secureCreatePath(validatorsDir).mapErrTo(FailedToCreateValidatorsDir)
defer:
if not (success or validatorsDirExisted):
discard io2.removeDir(validatorsDir)
# keystoreDir:
? secureCreatePath(keystoreDir).mapErrTo(FailedToCreateKeystoreDir)
defer:
if not success:
discard io2.removeDir(keystoreDir)
# secretFile:
? secureWriteFile(secretFile,
passwordAsString).mapErrTo(FailedToCreateSecretFile)
defer:
if not success:
discard io2.removeFile(secretFile)
# keystoreFile:
let lock =
? secureWriteLockedFile(keystoreFile,
encodedStorage).mapErrTo(FailedToCreateKeystoreFile)
success = true
ok(lock)
proc createRemoteValidatorFiles*(
validatorsDir, keystoreDir, keystoreFile, encodedStorage: string
): Result[void, KeystoreGenerationError] {.raises: [Defect].} =
var
success = false # becomes true when everything is created successfully
# validatorsDir:
let validatorsDirExisted: bool = dirExists(validatorsDir)
if not(validatorsDirExisted):
? secureCreatePath(validatorsDir).mapErrTo(FailedToCreateValidatorsDir)
defer:
if not (success or validatorsDirExisted):
discard io2.removeDir(validatorsDir)
# keystoreDir:
? secureCreatePath(keystoreDir).mapErrTo(FailedToCreateKeystoreDir)
defer:
if not success:
discard io2.removeDir(keystoreDir)
# keystoreFile:
? secureWriteFile(keystoreFile,
encodedStorage).mapErrTo(FailedToCreateKeystoreFile)
success = true
ok()
proc createLockedRemoteValidatorFiles*(
validatorsDir, keystoreDir, keystoreFile, encodedStorage: string
): Result[FileLockHandle, KeystoreGenerationError] {.raises: [Defect].} =
var
success = false # becomes true when everything is created successfully
# validatorsDir:
let validatorsDirExisted: bool = dirExists(validatorsDir)
if not(validatorsDirExisted):
? secureCreatePath(validatorsDir).mapErrTo(FailedToCreateValidatorsDir)
defer:
if not (success or validatorsDirExisted):
discard io2.removeDir(validatorsDir)
# keystoreDir:
? secureCreatePath(keystoreDir).mapErrTo(FailedToCreateKeystoreDir)
defer:
if not success:
discard io2.removeDir(keystoreDir)
# keystoreFile:
let lock = ? secureWriteLockedFile(
keystoreFile, encodedStorage).mapErrTo(FailedToCreateKeystoreFile)
success = true
ok(lock)
proc saveKeystore*(
rng: var HmacDrbgContext,
validatorsDir, secretsDir: string,
signingKey: ValidatorPrivKey,
signingPubKey: CookedPubKey,
signingKeyPath: KeyPath,
password: string,
salt: openArray[byte] = @[],
mode = Secure
): Result[void, KeystoreGenerationError] {.raises: [Defect].} =
let
keypass = KeystorePass.init(password)
keyName = signingPubKey.fsName
keystoreDir = validatorsDir / keyName
keystoreFile = keystoreDir / KeystoreFileName
if dirExists(keystoreDir):
return err(KeystoreGenerationError(kind: DuplicateKeystoreDir,
error: "Keystore directory already exists"))
if fileExists(keystoreFile):
return err(KeystoreGenerationError(kind: DuplicateKeystoreFile,
error: "Keystore file already exists"))
let keyStore = createKeystore(kdfPbkdf2, rng, signingKey,
keypass, signingKeyPath,
mode = mode, salt = salt)
let encodedStorage =
try:
Json.encode(keyStore)
except SerializationError as e:
error "Could not serialize keystorage", key_path = keystoreFile
return err(KeystoreGenerationError(
kind: FailedToCreateKeystoreFile, error: e.msg))
? createLocalValidatorFiles(secretsDir, validatorsDir,
keystoreDir,
secretsDir / keyName, keypass.str,
keystoreFile, encodedStorage)
ok()
proc saveLockedKeystore*(
rng: var HmacDrbgContext,
validatorsDir, secretsDir: string,
signingKey: ValidatorPrivKey,
signingPubKey: CookedPubKey,
signingKeyPath: KeyPath,
password: string,
mode = Secure
): Result[FileLockHandle, KeystoreGenerationError] {.raises: [Defect].} =
let
keypass = KeystorePass.init(password)
keyName = signingPubKey.fsName
keystoreDir = validatorsDir / keyName
keystoreFile = keystoreDir / KeystoreFileName
if dirExists(keystoreDir):
return err(KeystoreGenerationError(kind: DuplicateKeystoreDir,
error: "Keystore directory already exists"))
if fileExists(keystoreFile):
return err(KeystoreGenerationError(kind: DuplicateKeystoreFile,
error: "Keystore file already exists"))
let keyStore = createKeystore(kdfPbkdf2, rng, signingKey,
keypass, signingKeyPath,
mode = mode)
let encodedStorage =
try:
Json.encode(keyStore)
except SerializationError as e:
error "Could not serialize keystorage", key_path = keystoreFile
return err(KeystoreGenerationError(
kind: FailedToCreateKeystoreFile, error: e.msg))
let lock = ? createLockedLocalValidatorFiles(secretsDir, validatorsDir,
keystoreDir,
secretsDir / keyName,
keypass.str,
keystoreFile, encodedStorage)
ok(lock)
proc saveKeystore*(
validatorsDir: string,
publicKey: ValidatorPubKey,
urls: seq[RemoteSignerInfo],
threshold: uint32,
flags: set[RemoteKeystoreFlag] = {},
remoteType = RemoteSignerType.Web3Signer,
desc = ""
): Result[void, KeystoreGenerationError] {.raises: [Defect].} =
let
keyName = publicKey.fsName
keystoreDir = validatorsDir / keyName
keystoreFile = keystoreDir / RemoteKeystoreFileName
keystoreDesc = if len(desc) == 0: none[string]() else: some(desc)
keyStore = RemoteKeystore(
version: 2'u64,
description: keystoreDesc,
remoteType: remoteType,
pubkey: publicKey,
threshold: threshold,
remotes: urls,
flags: flags)
if dirExists(keystoreDir):
return err(KeystoreGenerationError(kind: DuplicateKeystoreDir,
error: "Keystore directory already exists"))
if fileExists(keystoreFile):
return err(KeystoreGenerationError(kind: DuplicateKeystoreFile,
error: "Keystore file already exists"))
let encodedStorage =
try:
Json.encode(keyStore)
except SerializationError as exc:
error "Could not serialize keystorage", key_path = keystoreFile
return err(KeystoreGenerationError(
kind: FailedToCreateKeystoreFile, error: exc.msg))
? createRemoteValidatorFiles(validatorsDir, keystoreDir, keystoreFile,
encodedStorage)
ok()
proc saveLockedKeystore*(
validatorsDir: string,
publicKey: ValidatorPubKey,
urls: seq[RemoteSignerInfo],
threshold: uint32,
flags: set[RemoteKeystoreFlag] = {},
remoteType = RemoteSignerType.Web3Signer,
desc = ""
): Result[FileLockHandle, KeystoreGenerationError] {.raises: [Defect].} =
let
keyName = publicKey.fsName
keystoreDir = validatorsDir / keyName
keystoreFile = keystoreDir / RemoteKeystoreFileName
keystoreDesc = if len(desc) == 0: none[string]() else: some(desc)
keyStore = RemoteKeystore(
version: 2'u64,
description: keystoreDesc,
remoteType: remoteType,
pubkey: publicKey,
threshold: threshold,
remotes: urls,
flags: flags)
if dirExists(keystoreDir):
return err(KeystoreGenerationError(kind: DuplicateKeystoreDir,
error: "Keystore directory already exists"))
if fileExists(keystoreFile):
return err(KeystoreGenerationError(kind: DuplicateKeystoreFile,
error: "Keystore file already exists"))
let encodedStorage =
try:
Json.encode(keyStore)
except SerializationError as exc:
error "Could not serialize keystorage", key_path = keystoreFile
return err(KeystoreGenerationError(
kind: FailedToCreateKeystoreFile, error: exc.msg))
let lock = ? createLockedRemoteValidatorFiles(validatorsDir, keystoreDir,
keystoreFile, encodedStorage)
ok(lock)
proc saveKeystore*(
validatorsDir: string,
publicKey: ValidatorPubKey,
url: HttpHostUri
): Result[void, KeystoreGenerationError] {.raises: [Defect].} =
let remoteInfo = RemoteSignerInfo(url: url, id: 0)
saveKeystore(validatorsDir, publicKey, @[remoteInfo], 1)
proc saveLockedKeystore*(
validatorsDir: string,
publicKey: ValidatorPubKey,
url: HttpHostUri
): Result[FileLockHandle, KeystoreGenerationError] {.raises: [Defect].} =
let remoteInfo = RemoteSignerInfo(url: url, id: 0)
saveLockedKeystore(validatorsDir, publicKey, @[remoteInfo], 1)
proc importKeystore*(pool: var ValidatorPool,
validatorsDir: string,
keystore: RemoteKeystore): ImportResult[KeystoreData]
{.raises: [Defect].} =
let
publicKey = keystore.pubkey
keyName = publicKey.fsName
keystoreDir = validatorsDir / keyName
keystoreFile = keystoreDir / RemoteKeystoreFileName
# We check `publicKey`.
let cookedKey = publicKey.load().valueOr:
return err(
AddValidatorFailure.init(AddValidatorStatus.failed,
"Invalid validator's public key"))
# We check `publicKey` in memory storage first.
if publicKey in pool:
return err(AddValidatorFailure.init(AddValidatorStatus.existingArtifacts))
# We check `publicKey` in filesystem.
if existsKeystore(keystoreDir, {KeystoreKind.Local, KeystoreKind.Remote}):
return err(AddValidatorFailure.init(AddValidatorStatus.existingArtifacts))
let res = saveLockedKeystore(validatorsDir, publicKey, keystore.remotes,
keystore.threshold)
if res.isErr():
return err(AddValidatorFailure.init(AddValidatorStatus.failed,
$res.error()))
ok(KeystoreData.init(cookedKey, keystore.remotes, keystore.threshold,
res.get()))
proc importKeystore*(pool: var ValidatorPool,
rng: var HmacDrbgContext,
validatorsDir, secretsDir: string,
keystore: Keystore,
password: string): ImportResult[KeystoreData] {.
raises: [Defect].} =
let keypass = KeystorePass.init(password)
let privateKey =
block:
let res = decryptKeystore(keystore, keypass)
if res.isOk():
res.get()
else:
return err(
AddValidatorFailure.init(AddValidatorStatus.failed, res.error()))
let
publicKey = privateKey.toPubKey()
keyName = publicKey.fsName
secretFile = secretsDir / keyName
keystoreDir = validatorsDir / keyName
keystoreFile = keystoreDir / KeystoreFileName
# We check `publicKey` in memory storage first.
if publicKey.toPubKey() in pool:
return err(AddValidatorFailure.init(AddValidatorStatus.existingArtifacts))
# We check `publicKey` in filesystem.
if existsKeystore(keystoreDir, {KeystoreKind.Local, KeystoreKind.Remote}):
return err(AddValidatorFailure.init(AddValidatorStatus.existingArtifacts))
let res = saveLockedKeystore(rng, validatorsDir, secretsDir,
privateKey, publicKey, keystore.path, password)
if res.isErr():
return err(AddValidatorFailure.init(AddValidatorStatus.failed,
$res.error()))
ok(KeystoreData.init(privateKey, keystore, res.get()))
proc generateDistributedStore*(rng: var HmacDrbgContext,
shares: seq[SecretShare],
pubKey: ValidatorPubKey,
validatorIdx: Natural,
shareSecretsDir: string,
shareValidatorDir: string,
remoteValidatorDir: string,
remoteSignersUrls: seq[string],
threshold: uint32,
mode = KeystoreMode.Secure): Result[void, KeystoreGenerationError] =
var signers: seq[RemoteSignerInfo]
for idx, share in shares:
var password = KeystorePass.init ncrutils.toHex(rng.generateBytes(32))
# remote signer shares
defer: burnMem(password)
? saveKeystore(rng,
shareValidatorDir / $share.id,
shareSecretsDir / $share.id,
share.key,
share.key.toPubKey,
makeKeyPath(validatorIdx, signingKeyKind),
password.str,
@[],
mode)
signers.add RemoteSignerInfo(
url: HttpHostUri(parseUri(remoteSignersUrls[idx])),
id: share.id,
pubkey: share.key.toPubKey.toPubKey)
# actual validator
saveKeystore(remoteValidatorDir, pubKey, signers, threshold)
func validatorKeystoreDir(host: KeymanagerHost,
pubkey: ValidatorPubKey): string =
host.validatorsDir.validatorKeystoreDir(pubkey)
func feeRecipientPath*(host: KeymanagerHost,
pubkey: ValidatorPubKey): string =
host.validatorsDir.feeRecipientPath(pubkey)
func gasLimitPath*(host: KeymanagerHost,
pubkey: ValidatorPubKey): string =
host.validatorsDir.gasLimitPath(pubkey)
proc removeFeeRecipientFile*(host: KeymanagerHost,
pubkey: ValidatorPubKey): Result[void, string] =
let path = host.feeRecipientPath(pubkey)
if fileExists(path):
let res = io2.removeFile(path)
if res.isErr:
return err res.error.ioErrorMsg
return ok()
proc removeGasLimitFile*(host: KeymanagerHost,
pubkey: ValidatorPubKey): Result[void, string] =
let path = host.gasLimitPath(pubkey)
if fileExists(path):
let res = io2.removeFile(path)
if res.isErr:
return err res.error.ioErrorMsg
return ok()
proc setFeeRecipient*(host: KeymanagerHost, pubkey: ValidatorPubKey, feeRecipient: Eth1Address): Result[void, string] =
let validatorKeystoreDir = host.validatorKeystoreDir(pubkey)
? secureCreatePath(validatorKeystoreDir).mapErr(proc(e: auto): string =
"Could not create wallet directory [" & validatorKeystoreDir & "]: " & $e)
io2.writeFile(validatorKeystoreDir / FeeRecipientFilename, $feeRecipient)
.mapErr(proc(e: auto): string = "Failed to write fee recipient file: " & $e)
proc setGasLimit*(host: KeymanagerHost,
pubkey: ValidatorPubKey,
gasLimit: uint64): Result[void, string] =
let validatorKeystoreDir = host.validatorKeystoreDir(pubkey)
? secureCreatePath(validatorKeystoreDir).mapErr(proc(e: auto): string =
"Could not create wallet directory [" & validatorKeystoreDir & "]: " & $e)
io2.writeFile(validatorKeystoreDir / GasLimitFilename, $gasLimit)
.mapErr(proc(e: auto): string = "Failed to write gas limit file: " & $e)
proc getSuggestedFeeRecipient*(
host: KeymanagerHost,
pubkey: ValidatorPubKey): Result[Eth1Address, ValidatorConfigFileStatus] =
host.validatorsDir.getSuggestedFeeRecipient(pubkey, host.defaultFeeRecipient)
proc getSuggestedGasLimit*(
host: KeymanagerHost,
pubkey: ValidatorPubKey): Result[uint64, ValidatorConfigFileStatus] =
host.validatorsDir.getSuggestedGasLimit(pubkey, host.defaultGasLimit)
proc addValidator*(host: KeymanagerHost, keystore: KeystoreData) =
let
feeRecipient = host.getSuggestedFeeRecipient(keystore.pubkey).valueOr(
host.defaultFeeRecipient)
gasLimit = host.getSuggestedGasLimit(keystore.pubkey).valueOr(
host.defaultGasLimit)
v = host.validatorPool[].addValidator(keystore, feeRecipient, gasLimit)
if not isNil(host.getValidatorAndIdxFn):
let data = host.getValidatorAndIdxFn(keystore.pubkey)
v.updateValidator(data)
proc generateDeposits*(cfg: RuntimeConfig,
rng: var HmacDrbgContext,
seed: KeySeed,
firstValidatorIdx, totalNewValidators: int,
validatorsDir: string,
secretsDir: string,
remoteSignersUrls: seq[string] = @[],
threshold: uint32 = 1,
remoteValidatorsCount: uint32 = 0,
mode = Secure): Result[seq[DepositData],
KeystoreGenerationError] =
var deposits: seq[DepositData]
notice "Generating deposits", totalNewValidators, validatorsDir, secretsDir
# We'll reuse a single variable here to make the secret
# scrubbing (burnMem) easier to handle:
var baseKey = deriveMasterKey(seed)
defer: burnMem(baseKey)
baseKey = deriveChildKey(baseKey, baseKeyPath)
var
salt = rng.generateKeystoreSalt()
password = KeystorePass.init ncrutils.toHex(rng.generateBytes(32))
defer:
burnMem(salt)
burnMem(password)
let localValidatorsCount = totalNewValidators - int(remoteValidatorsCount)
for i in 0 ..< localValidatorsCount:
let validatorIdx = firstValidatorIdx + i
# We'll reuse a single variable here to make the secret
# scrubbing (burnMem) easier to handle:
var derivedKey = baseKey
defer: burnMem(derivedKey)
derivedKey = deriveChildKey(derivedKey, validatorIdx)
derivedKey = deriveChildKey(derivedKey, 0) # This is witdrawal key
let withdrawalPubKey = derivedKey.toPubKey
derivedKey = deriveChildKey(derivedKey, 0) # This is the signing key
let signingPubKey = derivedKey.toPubKey
? saveKeystore(rng, validatorsDir, secretsDir,
derivedKey, signingPubKey,
makeKeyPath(validatorIdx, signingKeyKind), password.str,
salt, mode)
deposits.add prepareDeposit(
cfg, withdrawalPubKey, derivedKey, signingPubKey)
for i in 0 ..< remoteValidatorsCount:
let validatorIdx = int(firstValidatorIdx) + localValidatorsCount + int(i)
# We'll reuse a single variable here to make the secret
# scrubbing (burnMem) easier to handle:
var derivedKey = baseKey
defer: burnMem(derivedKey)
derivedKey = deriveChildKey(derivedKey, validatorIdx)
derivedKey = deriveChildKey(derivedKey, 0) # This is witdrawal key
let withdrawalPubKey = derivedKey.toPubKey
derivedKey = deriveChildKey(derivedKey, 0) # This is the signing key
let signingPubKey = derivedKey.toPubKey
let sharesCount = uint32 len(remoteSignersUrls)
let shares = generateSecretShares(derivedKey, rng, threshold, sharesCount)
if shares.isErr():
error "Failed to generate distributed key: ", threshold, sharesCount
continue
? generateDistributedStore(rng,
shares.get,
signingPubKey.toPubKey,
validatorIdx,
secretsDir & "_shares",
validatorsDir & "_shares",
validatorsDir,
remoteSignersUrls,
threshold,
mode)
deposits.add prepareDeposit(
cfg, withdrawalPubKey, derivedKey, signingPubKey)
ok deposits
proc saveWallet*(wallet: Wallet, outWalletPath: string): Result[void, string] =
let walletDir = splitFile(outWalletPath).dir
var encodedWallet: string
try:
encodedWallet = Json.encode(wallet, pretty = true)
except SerializationError:
return err("Could not serialize wallet")
? secureCreatePath(walletDir).mapErr(proc(e: auto): string =
"Could not create wallet directory [" & walletDir & "]: " & $e)
? secureWriteFile(outWalletPath, encodedWallet).mapErr(proc(e: auto): string =
"Could not write wallet to file [" & outWalletPath & "]: " & $e)
ok()
proc saveWallet*(wallet: WalletPathPair): Result[void, string] =
saveWallet(wallet.wallet, wallet.path)
proc readPasswordInput(prompt: string, password: var string): bool =
try:
when defined(windows):
# readPasswordFromStdin() on Windows always returns `false`.
# https://github.com/nim-lang/Nim/issues/15207
discard readPasswordFromStdin(prompt, password)
true
else:
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 importKeystoreFromFile*(
fileName: string
): Result[ValidatorPrivKey, string] =
var password: string # TODO consider using a SecretString type
defer: burnMem(password)
let
data = readAllChars(fileName).valueOr:
return err("Unable to read keystore file [" & ioErrorMsg(error) & "]")
keystore =
try:
parseKeystore(data)
except SerializationError as e:
return err("Invalid keystore file format [" &
e.formatMsg(fileName) & "]")
var firstDecryptionAttempt = true
while true:
var secret: seq[byte]
let status = decryptCryptoField(keystore.crypto,
KeystorePass.init(password),
secret)
case status
of DecryptionStatus.Success:
let privateKey = ValidatorPrivKey.fromRaw(secret).valueOr:
return err("Keystore holds invalid private key [" & $error & "]")
return ok(privateKey)
of DecryptionStatus.InvalidKeystore:
return err("Invalid keystore format")
of DecryptionStatus.InvalidPassword:
if firstDecryptionAttempt:
try:
const msg = "Please enter the password for decrypting '$1'"
echo msg % [fileName]
except ValueError:
raiseAssert "The format string above is correct"
firstDecryptionAttempt = false
else:
echo "The entered password was incorrect. Please try again."
if not(readPasswordInput("Password: ", password)):
echo "System error while entering password. Please try again."
if len(password) == 0: break
proc importKeystoresFromDir*(rng: var HmacDrbgContext, meth: ImportMethod,
importedDir, validatorsDir, secretsDir: string) =
var password: string # TODO consider using a SecretString type
defer: burnMem(password)
var (singleSaltPassword, singleSaltSalt) =
case meth
of ImportMethod.Normal:
var defaultSeq: seq[byte]
(KeystorePass.init(""), defaultSeq)
of ImportMethod.SingleSalt:
(KeystorePass.init(ncrutils.toHex(rng.generateBytes(32))),
rng.generateBytes(32))
defer:
burnMem(singleSaltPassword)
burnMem(singleSaltSalt)
try:
for file in walkDirRec(importedDir):
let filenameParts = splitFile(file)
if toLowerAscii(filenameParts.ext) != ".json":
continue
# In case we are importing from eth2.0-deposits-cli, the imported
# validator_keys directory will also include a "deposit_data" file
# intended for uploading to the launchpad. We'll skip it to avoid
# the "Invalid keystore" warning that it will trigger.
if filenameParts.name.startsWith("deposit_data"):
continue
let keystore =
try:
Json.loadFile(file, Keystore,
requireAllFields = true,
allowUnknownFields = true)
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: seq[byte]
let status = decryptCryptoField(keystore.crypto,
KeystorePass.init password,
secret)
case status
of DecryptionStatus.Success:
let privKey = ValidatorPrivKey.fromRaw(secret)
if privKey.isOk:
let pubkey = privKey.value.toPubKey
var (password, salt) =
case meth
of ImportMethod.Normal:
var defaultSeq: seq[byte]
(KeystorePass.init ncrutils.toHex(rng.generateBytes(32)),
defaultSeq)
of ImportMethod.SingleSalt:
(singleSaltPassword, singleSaltSalt)
defer:
burnMem(password)
burnMem(salt)
let status = saveKeystore(rng, validatorsDir, secretsDir,
privKey.value, pubkey,
keystore.path, password.str,
salt)
if status.isOk:
notice "Keystore imported", file
else:
error "Failed to import keystore",
file, validatorsDir, secretsDir, err = status.error
else:
error "Imported keystore holds invalid key", file, err = privKey.error
break
of DecryptionStatus.InvalidKeystore:
warn "Invalid keystore", file
break
of DecryptionStatus.InvalidPassword:
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
except OSError:
fatal "Failed to access the imported deposits directory"
quit 1
template ask(prompt: string): string =
try:
stdout.write prompt, ": "
stdin.readLine()
except IOError:
return err "failure to read data from stdin"
proc pickPasswordAndSaveWallet(rng: var HmacDrbgContext,
config: BeaconNodeConf,
seed: KeySeed): Result[WalletPathPair, string] =
echoP "When you perform operations with your wallet such as withdrawals " &
"and additional deposits, you'll be asked to enter a signing " &
"password. Please note that this password is local to the current " &
"machine and you can change it at any time."
echo ""
var password =
block:
let prompt = "Please enter a password: "
let confirm = "Please repeat the password: "
? keyboardCreatePassword(prompt, confirm)
defer: burnMem(password)
var name: WalletName
let outWalletName = config.outWalletName
if outWalletName.isSome:
name = outWalletName.get
else:
echoP "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."
echo ""
while true:
let 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 nextAccount =
if config.cmd == wallets and config.walletsCmd == WalletsCmd.restore:
config.restoredDepositsCount
else:
none Natural
let wallet = createWallet(kdfPbkdf2, rng, seed,
name = name,
nextAccount = nextAccount,
password = KeystorePass.init password)
let outWalletFileFlag = config.outWalletFile
let outWalletFile =
if outWalletFileFlag.isSome:
string outWalletFileFlag.get
else:
config.walletsDir / addFileExt(string wallet.name, "json")
let status = saveWallet(wallet, outWalletFile)
if status.isErr:
return err("failure to create wallet file due to " & status.error)
echo "\nWallet file successfully written to \"", outWalletFile, "\""
return ok WalletPathPair(wallet: wallet, path: outWalletFile)
when defined(windows):
proc clearScreen =
discard execShellCmd("cls")
else:
template clearScreen =
echo "\e[1;1H\e[2J\e[3J"
proc createWalletInteractively*(
rng: var HmacDrbgContext,
config: BeaconNodeConf): Result[CreatedWallet, string] =
if config.nonInteractive:
return err "not running in interactive mode"
echoP "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 can use the " &
"seed phrase to re-generate your signing and withdrawal keys."
echoP "The seed phrase should be kept secret in a safe location as if " &
"you are protecting a sensitive password. It can be used to withdraw " &
"funds from your wallet."
echoP "We will display the seed phrase on the next screen. Please make sure " &
"you are in a safe environment and there are no cameras or potentially " &
"unwanted eye witnesses around you. Please prepare everything necessary " &
"to copy the seed phrase to a safe location and type 'continue' in " &
"the prompt below to proceed to the next screen or 'q' to exit now."
echo ""
while true:
let answer = ask "Action"
if answer.len > 0 and answer[0] == 'q': quit 1
if answer == "continue": break
echoP "To proceed to your seed phrase, please type 'continue' (without the quotes). " &
"Type 'q' to exit now."
echo ""
var mnemonic = generateMnemonic(rng)
defer: burnMem(mnemonic)
try:
echoP "Your seed phrase is:"
setStyleNoError({styleBright})
setForegroundColorNoError fgCyan
echoP $mnemonic
resetAttributesNoError()
except IOError, ValueError:
return err "failure to write to the standard output"
echoP "Press any key to continue."
try:
discard getch()
except IOError as err:
fatal "Failed to read a key from stdin", err = err.msg
quit 1
clearScreen()
echoP "To confirm that you've saved the seed phrase, please enter the " &
"first and the last three words of it. In case you've saved the " &
"seek phrase in your clipboard, we strongly advice clearing the " &
"clipboard now."
echo ""
for i in countdown(2, 0):
let answer = ask "Answer"
let parts = answer.split(' ', maxsplit = 1)
if parts.len == 2:
if count(parts[1], ' ') == 2 and
mnemonic.string.startsWith(parts[0]) and
mnemonic.string.endsWith(parts[1]):
break
else:
doAssert parts.len == 1
if i > 0:
echo "\nYour answer was not correct. You have ", i, " more attempts"
echoP "Please enter 4 words separated with a single space " &
"(the first word from the seed phrase, followed by the last 3)"
echo ""
else:
quit 1
clearScreen()
var mnenomicPassword = KeystorePass.init ""
defer: burnMem(mnenomicPassword)
echoP "The recovery of your wallet can be additionally protected by a" &
"recovery password. Since the seed phrase itself can be considered " &
"a password, setting such an additional password is optional. " &
"To ensure the strongest possible security, we recommend writing " &
"down your seed phrase and remembering your recovery password. " &
"If you don't want to set a recovery password, just press ENTER."
var recoveryPassword = keyboardCreatePassword(
"Recovery password: ", "Confirm password: ", allowEmpty = true)
defer:
if recoveryPassword.isOk:
burnMem(recoveryPassword.get)
if recoveryPassword.isErr:
fatal "Failed to read password from stdin: "
quit 1
var keystorePass = KeystorePass.init recoveryPassword.get
defer: burnMem(keystorePass)
var seed = getSeed(mnemonic, keystorePass)
defer: burnMem(seed)
let walletPath = ? pickPasswordAndSaveWallet(rng, config, seed)
return ok CreatedWallet(walletPath: walletPath, seed: seed)
proc restoreWalletInteractively*(rng: var HmacDrbgContext,
config: BeaconNodeConf) =
var
enteredMnemonic: string
validatedMnemonic: Mnemonic
defer:
burnMem enteredMnemonic
burnMem validatedMnemonic
echo "To restore your wallet, please enter your backed-up seed phrase."
while true:
if not readPasswordInput("Seedphrase: ", enteredMnemonic):
fatal "failure to read password from stdin"
quit 1
if validateMnemonic(enteredMnemonic, validatedMnemonic):
break
else:
echo "The entered mnemonic was not valid. Please try again."
echoP "If your seed phrase was protected with a recovery password, " &
"please enter it below. Please ENTER to attempt to restore " &
"the wallet without a recovery password."
var recoveryPassword = keyboardCreatePassword(
"Recovery password: ", "Confirm password: ", allowEmpty = true)
defer:
if recoveryPassword.isOk:
burnMem(recoveryPassword.get)
if recoveryPassword.isErr:
fatal "Failed to read password from stdin"
quit 1
var keystorePass = KeystorePass.init recoveryPassword.get
defer: burnMem(keystorePass)
var seed = getSeed(validatedMnemonic, keystorePass)
defer: burnMem(seed)
discard pickPasswordAndSaveWallet(rng, config, seed)
proc unlockWalletInteractively*(wallet: Wallet): Result[KeySeed, string] =
echo "Please enter the password for unlocking the wallet"
let res = keyboardGetPassword[KeySeed]("Password: ", 3,
proc (password: string): KsResult[KeySeed] =
var secret: seq[byte]
defer: burnMem(secret)
let status = decryptCryptoField(wallet.crypto, KeystorePass.init password, secret)
case status
of DecryptionStatus.Success:
ok(KeySeed secret)
else:
# TODO Handle InvalidKeystore in a special way here
let failed = "Unlocking of the wallet failed. Please try again"
echo failed
err(failed)
)
if res.isOk():
ok(res.get())
else:
err "Unlocking of the wallet failed."
proc loadWallet*(fileName: string): Result[Wallet, string] =
try:
ok Json.loadFile(fileName, Wallet)
except SerializationError as err:
err "Invalid wallet syntax: " & err.formatMsg(fileName)
except IOError as err:
err "Error accessing wallet file \"" & fileName & "\": " & err.msg
proc findWallet*(config: BeaconNodeConf,
name: WalletName): Result[Option[WalletPathPair], string] =
var walletFiles = newSeq[string]()
try:
for kind, walletFile in walkDir(config.walletsDir):
if kind != pcFile: continue
let walletId = splitFile(walletFile).name
if cmpIgnoreCase(walletId, name.string) == 0:
let wallet = ? loadWallet(walletFile)
return ok some WalletPathPair(wallet: wallet, path: walletFile)
walletFiles.add walletFile
except OSError as err:
return err("Error accessing the wallets directory \"" &
config.walletsDir & "\": " & err.msg)
for walletFile in walletFiles:
let wallet = ? loadWallet(walletFile)
if cmpIgnoreCase(wallet.name.string, name.string) == 0 or
cmpIgnoreCase(wallet.uuid.string, name.string) == 0:
return ok some WalletPathPair(wallet: wallet, path: walletFile)
return ok none(WalletPathPair)
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,
cfg: RuntimeConfig, 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: cfg.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)