dsmiley commented on code in PR #4120: URL: https://github.com/apache/solr/pull/4120#discussion_r2785888517
########## solr/core/src/java/org/apache/solr/servlet/AuthenticationFilter.java: ########## @@ -0,0 +1,188 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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 org.apache.solr.servlet; + +import static org.apache.solr.common.SolrException.ErrorCode.SERVER_ERROR; +import static org.apache.solr.security.AuditEvent.EventType.ANONYMOUS; +import static org.apache.solr.security.AuditEvent.EventType.AUTHENTICATED; +import static org.apache.solr.security.AuditEvent.EventType.REJECTED; + +import io.opentelemetry.api.trace.Span; +import jakarta.servlet.FilterChain; +import jakarta.servlet.FilterConfig; +import jakarta.servlet.ServletException; +import jakarta.servlet.ServletRequest; +import jakarta.servlet.ServletResponse; +import jakarta.servlet.http.HttpServletRequest; +import jakarta.servlet.http.HttpServletResponse; +import java.io.IOException; +import java.lang.invoke.MethodHandles; +import org.apache.solr.common.SolrException; +import org.apache.solr.core.CoreContainer; +import org.apache.solr.security.AuthenticationPlugin; +import org.apache.solr.security.PKIAuthenticationPlugin; +import org.apache.solr.security.PublicKeyHandler; +import org.apache.solr.util.tracing.TraceUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class AuthenticationFilter extends CoreContainerAwareHttpFilter { + + private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); + public static final String PLUGIN_DID_NOT_SET_ERROR_STATUS = + "{} threw SolrAuthenticationException without setting request status >= 400"; + + @Override + public void init(FilterConfig config) throws ServletException { + super.init(config); + } + + @Override + protected void doFilter(HttpServletRequest req, HttpServletResponse res, FilterChain chain) + throws IOException, ServletException { + + CoreContainer cc = getCores(); + AuthenticationPlugin authenticationPlugin = cc.getAuthenticationPlugin(); + String requestPath = ServletUtils.getPathAfterContext(req); + + ///////////////////////////////////////////////////////// + //////// Check cases where auth is not required. //////// + ///////////////////////////////////////////////////////// + + // Is authentication configured? + if (authenticationPlugin == null) { + cc.audit(ANONYMOUS, req); + chain.doFilter(req, res); + return; + } + + // /admin/info/key must be always open. see SOLR-9188 + if (PublicKeyHandler.PATH.equals(requestPath)) { + log.debug("Pass through PKI authentication endpoint"); + chain.doFilter(req, res); + return; + } + + if (isAdminUI(requestPath)) { + log.debug("Pass through Admin UI entry point"); + chain.doFilter(req, res); + return; + } + + ///////////////////////////////////////////////////////////////// + //////// if we make it here, authentication is required. //////// + ///////////////////////////////////////////////////////////////// + + // internode (internal) requests have their own PKI auth plugin + if (isInternodePKI(req, cc)) { + authenticationPlugin = cc.getPkiAuthenticationSecurityBuilder(); + } + + boolean authSuccess = false; + try { + authSuccess = + authenticate(req, res, new AuditSuccessChainWrapper(cc, chain), authenticationPlugin); + } finally { + if (!authSuccess) { + cc.audit(REJECTED, req); + res.flushBuffer(); + if (res.getStatus() < 400) { + log.error(PLUGIN_DID_NOT_SET_ERROR_STATUS, authenticationPlugin.getClass()); + res.sendError(401, "Authentication Plugin rejected credentials."); + } + } + } + } + + /** + * The plugin called by this method will call doFilter(req, res) for us (which is why we pass in + * the filter chain object as a parameter). + */ + private boolean authenticate( + HttpServletRequest req, + HttpServletResponse res, + FilterChain chain, + AuthenticationPlugin authenticationPlugin) { + try { + + // It is imperative that authentication plugins obey the contract in the javadoc for + // org.apache.solr.security.AuthenticationPlugin.doAuthenticate, and either return + // false or throw an exception if they cannot validate the user's credentials. + // Any plugin that doesn't do this is broken and should be fixed. + + logAuthAttempt(req); + return authenticationPlugin.authenticate(req, res, chain); + } catch (Exception e) { + log.info("Error authenticating", e); + throw new SolrException(SERVER_ERROR, "Error during request authentication, ", e); + } + } + + private static boolean isAdminUI(String requestPath) { + return "/solr/".equals(requestPath) || "/".equals(requestPath); + } + + private boolean isInternodePKI(HttpServletRequest req, CoreContainer cores) { + String header = req.getHeader(PKIAuthenticationPlugin.HEADER); + String headerV2 = req.getHeader(PKIAuthenticationPlugin.HEADER_V2); + return (header != null || headerV2 != null) + && cores.getPkiAuthenticationSecurityBuilder() != null; + } + + private void logAuthAttempt(HttpServletRequest req) { + // moved this to a method because spotless formatting is so horrible, and makes the log + // message look like a big deal... but it's just taking up space + if (log.isDebugEnabled()) { + log.debug( + "Request to authenticate: {}, domain: {}, port: {}", + req, + req.getLocalName(), + req.getLocalPort()); + } + } + + + + private record AuditSuccessChainWrapper(CoreContainer cc, FilterChain chain) Review Comment: https://stackoverflow.com/questions/71473485/what-is-the-difference-between-a-final-class-and-a-record#comment134638557_71474203 -- that's Brian Goetz (Java Architect). -- This is an automated message from the Apache Git Service. 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