/** Execute the example */
public void executeExample() {
// Use factory to statically bind the specific hardware wallet
TrezorV1HidHardwareWallet wallet =
HardwareWallets.newUsbInstance(
TrezorV1HidHardwareWallet.class,
Optional.<Integer>absent(),
Optional.<Integer>absent(),
Optional.<String>absent());
// Wrap the hardware wallet in a suitable client to simplify message API
HardwareWalletClient client = new TrezorHardwareWalletClient(wallet);
// Wrap the client in a service for high level API suitable for downstream applications
hardwareWalletService = new HardwareWalletService(client);
// Register for the high level hardware wallet events
HardwareWalletEvents.subscribe(this);
hardwareWalletService.start();
}
/**
* Downstream consumer applications should respond to hardware wallet events
*
* @param event The hardware wallet event indicating a state change
*/
@Subscribe
public void onHardwareWalletEvent(HardwareWalletEvent event) {
log.debug("Received hardware event: '{}'.{}", event.getEventType().name(), event.getMessage());
switch (event.getEventType()) {
case SHOW_DEVICE_FAILED:
// Treat as end of example
System.exit(0);
break;
case SHOW_DEVICE_DETACHED:
// Can simply wait for another device to be connected again
break;
case SHOW_DEVICE_READY:
if (hardwareWalletService.isWalletPresent()) {
// Create an identity
URI uri =
URI.create(
"ssh://[email protected]/trezor-connect"); // avoid using underscore in hostname
// (Java URI restriction)
// Request an identity public key from the device (no screen support at present)
hardwareWalletService.requestPublicKeyForIdentity(uri, 0, "nist256p1", false);
} else {
log.info("You need to have created a wallet before running this example");
}
break;
case SHOW_PIN_ENTRY:
// Device requires the current PIN to proceed
PinMatrixRequest request = (PinMatrixRequest) event.getMessage().get();
Scanner keyboard = new Scanner(System.in);
String pin;
switch (request.getPinMatrixRequestType()) {
case CURRENT:
System.err.println(
"Recall your PIN (e.g. '1').\n"
+ "Look at the device screen and type in the numerical position of each of the digits\n"
+ "with 1 being in the bottom left and 9 being in the top right (numeric keypad style) then press ENTER.");
pin = keyboard.next();
hardwareWalletService.providePIN(pin);
break;
}
break;
case SHOW_PASSPHRASE_ENTRY:
// Device requires the current passphrase to proceed
Scanner passKeyboard = new Scanner(System.in);
String passphrase;
System.err.println("Please enter your current passphrase: \n");
passphrase = passKeyboard.next();
hardwareWalletService.providePassphrase(passphrase);
break;
case PUBLIC_KEY_FOR_IDENTITY:
// Successful identity public key
PublicKey pubKey = (PublicKey) event.getMessage().get();
try {
log.info("Raw Public Key:\n{}", (pubKey.getHdNodeType().get().getPublicKey().get()));
// Retrieve public key from node (not xpub)
ECPublicKey publicKey =
IdentityUtils.getPublicKeyFromBytes(
pubKey.getHdNodeType().get().getPublicKey().get());
// Decompress key
String decompressedSSHKey = IdentityUtils.decompressSSHKeyFromNistp256(publicKey);
// Convert key to openSSH format
log.info(
"SSH Public Key:\n{}",
IdentityUtils.printOpenSSHkeyNistp256(decompressedSSHKey, "User1"));
System.exit(0);
} catch (Exception e) {
log.error("deviceTx FAILED.", e);
}
// Must have failed to be here
// Treat as end of example
System.exit(-1);
break;
case SHOW_OPERATION_FAILED:
// Treat as end of example
System.exit(-1);
break;
default:
// Ignore
}
}
