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accounts/usbwallet: detect and report in Ledger is in browser mode

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This commit is contained in:
Péter Szilágyi 2017-02-10 14:10:56 +02:00
parent 26cd41f0c7
commit c7022c1a0c
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GPG Key ID: E9AE538CEDF8293D
1 changed files with 17 additions and 4 deletions
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21
accounts/usbwallet/ledger_wallet.go
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@ -74,6 +74,11 @@ const (
ledgerP2ReturnAddressChainCode ledgerParam2 = 0x01 // Require a user confirmation before returning the address
)
// errReplyInvalidHeader is the error message returned by a Ledfer data exchange
// if the device replies with a mismatching header. This usually means the device
// is in browser mode.
var errReplyInvalidHeader = errors.New("invalid reply header")
// ledgerWallet represents a live USB Ledger hardware wallet.
type ledgerWallet struct {
context *usb.Context // USB context to interface libusb through
@ -87,6 +92,7 @@ type ledgerWallet struct {
failure error // Any failure that would make the device unusable
version [3]byte // Current version of the Ledger Ethereum app (zero if app is offline)
browser bool // Flag whether the Ledger is in browser mode (reply channel mismatch)
accounts []accounts.Account // List of derive accounts pinned on the Ledger
paths map[common.Address]accounts.DerivationPath // Known derivation paths for signing operations
@ -138,6 +144,9 @@ func (w *ledgerWallet) Status() string {
if w.device == nil {
return "Closed"
}
if w.browser {
return "Ethereum app in browser mode"
}
if w.offline() {
return "Ethereum app offline"
}
@ -239,7 +248,10 @@ func (w *ledgerWallet) Open(passphrase string) error {
}()
if _, err = w.ledgerDerive(accounts.DefaultBaseDerivationPath); err != nil {
// Ethereum app is not running, nothing more to do, return
// Ethereum app is not running or in browser mode, nothing more to do, return
if err == errReplyInvalidHeader {
w.browser = true
}
return nil
}
// Try to resolve the Ethereum app's version, will fail prior to v1.0.2
@ -351,7 +363,8 @@ func (w *ledgerWallet) close() error {
err := w.device.Close()
w.device, w.input, w.output = nil, nil, nil
w.version, w.accounts, w.paths = [3]byte{}, nil, nil
w.browser, w.version = false, [3]byte{}
w.accounts, w.paths = nil, nil
return err
}
@ -463,7 +476,7 @@ func (w *ledgerWallet) selfDerive() {
// Display a log message to the user for new (or previously empty accounts)
if _, known := w.paths[nextAddr]; !known || (!empty && nextAddr == w.deriveNextAddr) {
glog.V(logger.Info).Infof("%s discovered %s (balance %d, nonce %d) at %s", w.url.String(), nextAddr.Hex(), balance, nonce, path)
glog.V(logger.Info).Infof("%s discovered %s (balance %22v, nonce %4d) at %s", w.url.String(), nextAddr.Hex(), balance, nonce, path)
}
// Fetch the next potential account
if !empty {
@ -909,7 +922,7 @@ func (w *ledgerWallet) ledgerExchange(opcode ledgerOpcode, p1 ledgerParam1, p2 l
}
// Make sure the transport header matches
if chunk[0] != 0x01 || chunk[1] != 0x01 || chunk[2] != 0x05 {
return nil, fmt.Errorf("invalid reply header: %x", chunk[:3])
return nil, errReplyInvalidHeader
}
// If it's the first chunk, retrieve the total message length
if chunk[3] == 0x00 && chunk[4] == 0x00 {