| // Copyright (C) 2015 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.gerrit.httpd; |
| |
| import static com.google.common.base.Strings.nullToEmpty; |
| |
| import com.google.gerrit.extensions.registration.DynamicItem; |
| import com.google.gerrit.server.CurrentUser; |
| import com.google.gerrit.server.config.AuthConfig; |
| import com.google.inject.Inject; |
| import com.google.inject.Provider; |
| import com.google.inject.Singleton; |
| import java.io.IOException; |
| import javax.servlet.Filter; |
| import javax.servlet.FilterChain; |
| import javax.servlet.FilterConfig; |
| import javax.servlet.ServletException; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| import javax.servlet.http.Cookie; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import org.eclipse.jgit.http.server.GitSmartHttpTools; |
| |
| @Singleton |
| public class XsrfCookieFilter implements Filter { |
| private final Provider<CurrentUser> user; |
| private final DynamicItem<WebSession> session; |
| private final AuthConfig authConfig; |
| |
| @Inject |
| XsrfCookieFilter( |
| Provider<CurrentUser> user, DynamicItem<WebSession> session, AuthConfig authConfig) { |
| this.user = user; |
| this.session = session; |
| this.authConfig = authConfig; |
| } |
| |
| @Override |
| public void doFilter(ServletRequest req, ServletResponse rsp, FilterChain chain) |
| throws IOException, ServletException { |
| HttpServletRequest httpRequest = (HttpServletRequest) req; |
| if (!GitSmartHttpTools.isGitClient(httpRequest)) { |
| WebSession s = user.get().isIdentifiedUser() ? session.get() : null; |
| setXsrfTokenCookie(httpRequest, (HttpServletResponse) rsp, s); |
| } |
| chain.doFilter(req, rsp); |
| } |
| |
| private void setXsrfTokenCookie( |
| HttpServletRequest req, HttpServletResponse rsp, WebSession session) { |
| String v = session != null ? session.getXGerritAuth() : null; |
| Cookie c = new Cookie(XsrfConstants.XSRF_COOKIE_NAME, nullToEmpty(v)); |
| c.setPath("/"); |
| c.setSecure(authConfig.getCookieSecure() && isSecure(req)); |
| c.setMaxAge( |
| v != null |
| ? -1 // Set the cookie for this browser session. |
| : 0); // Remove the cookie (expire immediately). |
| rsp.addCookie(c); |
| } |
| |
| private boolean isSecure(HttpServletRequest req) { |
| return req.isSecure() || "https".equals(req.getScheme()); |
| } |
| |
| @Override |
| public void init(FilterConfig config) {} |
| |
| @Override |
| public void destroy() {} |
| } |