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package ch.asynk.security;
import java.util.HashMap;
import java.util.Map;
import com.vaadin.annotations.JavaScript;
import com.vaadin.server.AbstractJavaScriptExtension;
import com.vaadin.ui.UI;
import com.vaadin.ui.JavaScriptFunction;
import com.yubico.u2f.U2F;
import com.yubico.u2f.data.DeviceRegistration;
import com.yubico.u2f.data.messages.AuthenticateRequestData;
import com.yubico.u2f.data.messages.AuthenticateResponse;
import com.yubico.u2f.data.messages.RegisterRequestData;
import com.yubico.u2f.data.messages.RegisterResponse;
import com.yubico.u2f.exceptions.DeviceCompromisedException;
import com.yubico.u2f.exceptions.NoEligibleDevicesException;
import elemental.json.JsonArray;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@JavaScript({"u2f-api.js", "u2f_connector.js"})
public class U2fConnector extends AbstractJavaScriptExtension
{
private static final long serialVersionUID = 1L;
private static final Logger logger = LoggerFactory.getLogger(U2fConnector.class);
// appId MUST match the URL - https://developers.yubico.com/U2F/App_ID.html
private final String appId = "https://localhost:8666";
private final U2F u2f = new U2F();
// private final U2F u2f = U2F.withoutAppIdValidation();
// https://developers.yubico.com/U2F/Libraries/Client_error_codes.html
private static String U2F_ERRORS[] = {"","OTHER_ERROR","BAD_REQUEST","CONFIGURATION_UNSUPPORTED","DEVICE_INELIGIBLE","TIMEOUT","DEVICE_COMPROMISED"};
public String getErrorMsg(int i) { return U2F_ERRORS[i]; }
private final U2fService u2fService = new U2fServiceImpl();
class Request
{
String userId;
String data;
U2fListener listener;
public Request(String userId, String data, U2fListener listener)
{
this.userId = userId;
this.data = data;
this.listener = listener;
}
}
private final Map<String, Request> requests = new HashMap<>();
public enum U2fAction {
REGISTRATION_PENDING,
REGISTRATION_SUCCESS,
REGISTRATION_FAILURE,
AUTHENTICATION_PENDING,
AUTHENTICATION_FAILURE,
AUTHENTICATION_SUCCESS
};
public interface U2fListener
{
public void u2fCallback(U2fAction action, String msg);
}
public U2fConnector() {
extend(UI.getCurrent());
addFunction("onRegisterResponse", new JavaScriptFunction() {
private static final long serialVersionUID = 1L;
@Override
public void call(final JsonArray arguments) {
onRegisterResponse(arguments);
}
});
addFunction("onAuthenticateResponse", new JavaScriptFunction() {
private static final long serialVersionUID = 1L;
@Override
public void call(final JsonArray arguments) {
onAuthenticateResponse(arguments);
}
});
}
public void sendRegisterRequest(final String userId, final U2fListener listener)
{
final RegisterRequestData registerRequestData = u2f.startRegistration(appId, u2fService.getDeviceRegistrations(userId));
final String registerRequestDataJson = registerRequestData.toJson();
final String registerRequestDataId = registerRequestData.getRequestId();
requests.put(registerRequestDataId, new Request(userId, registerRequestDataJson, listener));
callFunction("register", registerRequestDataJson);
listener.u2fCallback(U2fAction.REGISTRATION_PENDING, null);
logger.debug(String.format("register[%s] : %s", userId, registerRequestDataJson));
}
public void onRegisterResponse(JsonArray arguments)
{
if (arguments.get(0) instanceof elemental.json.impl.JreJsonNumber) {
int errorCode = (int) arguments.getNumber(0);
// FIXME why does it not work ??
// final RegisterRequestData registerRequestData = RegisterRequestData.fromJson(arguments.getString(1));
final String registerRequestDataJson = arguments.getObject(1).toString();
final RegisterRequestData registerRequestData = RegisterRequestData.fromJson(registerRequestDataJson);
final Request request = requests.remove(registerRequestData.getRequestId());
request.listener.u2fCallback(U2fAction.REGISTRATION_FAILURE, getErrorMsg(errorCode));
logger.debug(String.format("failure[%d] : %s", errorCode, registerRequestDataJson));
} else {
final String registerResponseJson = arguments.getString(0);
final RegisterResponse registerResponse = RegisterResponse.fromJson(registerResponseJson);
final Request request = requests.remove(registerResponse.getRequestId());
final RegisterRequestData registerRequestData = RegisterRequestData.fromJson(request.data);
u2fService.addDeviceRegistration(request.userId, u2f.finishRegistration(registerRequestData, registerResponse));
request.listener.u2fCallback(U2fAction.REGISTRATION_SUCCESS, null);
logger.debug(String.format("success : %s", registerResponseJson));
}
}
public void startAuthentication(final String userId, final U2fListener listener)
{
try {
final AuthenticateRequestData authenticateRequestData = u2f.startAuthentication(appId, u2fService.getDeviceRegistrations(userId));
final String authenticateRequestDataJson = authenticateRequestData.toJson();
final String authenticateRequestDataId = authenticateRequestData.getRequestId();
requests.put(authenticateRequestDataId, new Request(userId, authenticateRequestDataJson, listener));
callFunction("authenticate", authenticateRequestDataJson, userId);
listener.u2fCallback(U2fAction.AUTHENTICATION_PENDING, null);
logger.debug(String.format("authenticate[%s] : %s", userId, authenticateRequestDataJson));
} catch (NoEligibleDevicesException e) {
listener.u2fCallback(U2fAction.AUTHENTICATION_FAILURE, getErrorMsg(4));
}
}
public void onAuthenticateResponse(JsonArray arguments)
{
if (arguments.get(0) instanceof elemental.json.impl.JreJsonNumber) {
int errorCode = (int) arguments.getNumber(0);
// FIXME why does it not work ??
// final AuthenticateRequestData authenticateRequestData = AuthenticateRequestData.fromJson(arguments.getString(1));
final String authenticateRequestDataJson = arguments.getObject(1).toString();
final AuthenticateRequestData authenticateRequestData = AuthenticateRequestData.fromJson(authenticateRequestDataJson);
final Request request = requests.remove(authenticateRequestData.getRequestId());
request.listener.u2fCallback(U2fAction.AUTHENTICATION_FAILURE, getErrorMsg(errorCode));
logger.debug(String.format("failure[%d] : %s", errorCode, authenticateRequestDataJson));
} else {
final String authenticateResponseJson = arguments.getString(0);
final AuthenticateResponse authenticateResponse = AuthenticateResponse.fromJson(authenticateResponseJson);
final Request request = requests.remove(authenticateResponse.getRequestId());
final AuthenticateRequestData authenticateRequestData = AuthenticateRequestData.fromJson(request.data);
DeviceRegistration registration = null;
try {
registration = u2f.finishAuthentication(authenticateRequestData, authenticateResponse, u2fService.getDeviceRegistrations(request.userId));
} catch (final DeviceCompromisedException e) {
request.listener.u2fCallback(U2fAction.AUTHENTICATION_FAILURE, getErrorMsg(6));
logger.error(String.format("device compromised: %s", request.data));
}
request.listener.u2fCallback(U2fAction.AUTHENTICATION_SUCCESS, null);
logger.debug(String.format("success : %s", authenticateResponseJson));
}
}
}
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