com.github.mcollovati.vertx.vaadin.connect.auth.VertxCsrfChecker Maven / Gradle / Ivy

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An adapter to run Vaadin Flow applications on Vertx
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/*
 * The MIT License
 * Copyright © 2016-2020 Marco Collovati ([email protected])
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.github.mcollovati.vertx.vaadin.connect.auth;

import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;

import com.vaadin.flow.server.VaadinService;
import io.vertx.ext.web.RoutingContext;
import io.vertx.ext.web.Session;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class VertxCsrfChecker implements CsrfChecker {

    private boolean csrfProtectionEnabled = true;

    @Override
    public boolean validateCsrfTokenInRequest(RoutingContext request) {
        if (!isCsrfProtectionEnabled()) {
            return true;
        }

        Session session = request.session();
        if (session == null) {
            return true;
        }

        String csrfTokenInSession = session.get(VaadinService.getCsrfTokenAttributeName());
        if (csrfTokenInSession == null) {
            if (getLogger().isInfoEnabled()) {
                getLogger().info("Unable to verify CSRF token for endpoint request, got null token in session");
            }

            return false;
        }

        String csrfTokenInRequest = request.request().getHeader("X-CSRF-Token");
        if (csrfTokenInRequest == null
                || !MessageDigest.isEqual(
                        csrfTokenInSession.getBytes(StandardCharsets.UTF_8),
                        csrfTokenInRequest.getBytes(StandardCharsets.UTF_8))) {
            if (getLogger().isInfoEnabled()) {
                getLogger().info("Invalid CSRF token in endpoint request");
            }

            return false;
        }

        return true;
    }

    @Override
    public void setCsrfProtection(boolean csrfProtectionEnabled) {
        this.csrfProtectionEnabled = csrfProtectionEnabled;
    }

    @Override
    public boolean isCsrfProtectionEnabled() {
        return csrfProtectionEnabled;
    }

    private static Logger getLogger() {
        return LoggerFactory.getLogger(VertxCsrfChecker.class);
    }
}