| /* |
| * 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. |
| */ |
| /** |
| * Communication security. |
| * <p> |
| * Drill uses Java's SASL library to authenticate clients (users and other bits). This is achieved using |
| * {@link org.apache.drill.exec.rpc.security.AuthenticationOutcomeListener} on the client-side, and |
| * {@link org.apache.drill.exec.rpc.security.ServerAuthenticationHandler} on the server-side. |
| * <p> |
| * If authentication is enabled, {@link org.apache.drill.exec.rpc.security.AuthenticatorFactory authenticator factory} |
| * implementations are discovered at startup from {@link org.apache.drill.common.scanner.persistence.ScanResult |
| * scan result} using {@link org.apache.drill.exec.rpc.security.AuthenticatorProviderImpl}. At connection time, after |
| * handshake, if either side requires authentication, a series of SASL messages are exchanged. Without successful |
| * authentication, any subsequent messages will result in failure and connection drop. |
| * <p> |
| * Out of the box, Drill supports {@link org.apache.drill.exec.rpc.security.kerberos.KerberosFactory KERBEROS} |
| * (through GSSAPI) and {@link org.apache.drill.exec.rpc.security.plain.PlainFactory PLAIN} (through |
| * {@link org.apache.drill.exec.rpc.user.security.UserAuthenticator}) mechanisms. |
| * |
| * @see <a href="https://issues.apache.org/jira/browse/DRILL-4280"> |
| * DRILL-4280 (design and configuration)</a> |
| * @see <a href="https://docs.oracle.com/javase/7/docs/api/javax/security/sasl/package-summary.html"> |
| * Java's SASL Library</a> |
| */ |
| package org.apache.drill.exec.rpc.security; |
