J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package com.sun.net.httpserver; |
| 27 | import java.net.*; |
| 28 | import java.io.*; |
| 29 | import java.util.*; |
| 30 | |
| 31 | /** |
| 32 | * Authenticator represents an implementation of an HTTP authentication |
| 33 | * mechanism. Sub-classes provide implementations of specific mechanisms |
| 34 | * such as Digest or Basic auth. Instances are invoked to provide verification |
| 35 | * of the authentication information provided in all incoming requests. |
| 36 | * Note. This implies that any caching of credentials or other authentication |
| 37 | * information must be done outside of this class. |
| 38 | */ |
| 39 | public abstract class Authenticator { |
| 40 | |
| 41 | /** |
| 42 | * Base class for return type from authenticate() method |
| 43 | */ |
| 44 | public abstract static class Result {} |
| 45 | |
| 46 | /** |
| 47 | * Indicates an authentication failure. The authentication |
| 48 | * attempt has completed. |
| 49 | */ |
| 50 | public static class Failure extends Result { |
| 51 | |
| 52 | private int responseCode; |
| 53 | |
| 54 | public Failure (int responseCode) { |
| 55 | this.responseCode = responseCode; |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * returns the response code to send to the client |
| 60 | */ |
| 61 | public int getResponseCode() { |
| 62 | return responseCode; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Indicates an authentication has succeeded and the |
| 68 | * authenticated user principal can be acquired by calling |
| 69 | * getPrincipal(). |
| 70 | */ |
| 71 | public static class Success extends Result { |
| 72 | private HttpPrincipal principal; |
| 73 | |
| 74 | public Success (HttpPrincipal p) { |
| 75 | principal = p; |
| 76 | } |
| 77 | /** |
| 78 | * returns the authenticated user Principal |
| 79 | */ |
| 80 | public HttpPrincipal getPrincipal() { |
| 81 | return principal; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Indicates an authentication must be retried. The |
| 87 | * response code to be sent back is as returned from |
| 88 | * getResponseCode(). The Authenticator must also have |
| 89 | * set any necessary response headers in the given HttpExchange |
| 90 | * before returning this Retry object. |
| 91 | */ |
| 92 | public static class Retry extends Result { |
| 93 | |
| 94 | private int responseCode; |
| 95 | |
| 96 | public Retry (int responseCode) { |
| 97 | this.responseCode = responseCode; |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * returns the response code to send to the client |
| 102 | */ |
| 103 | public int getResponseCode() { |
| 104 | return responseCode; |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * called to authenticate each incoming request. The implementation |
| 110 | * must return a Failure, Success or Retry object as appropriate :- |
| 111 | * <p> |
| 112 | * Failure means the authentication has completed, but has failed |
| 113 | * due to invalid credentials. |
| 114 | * <p> |
| 115 | * Sucess means that the authentication |
| 116 | * has succeeded, and a Principal object representing the user |
| 117 | * can be retrieved by calling Sucess.getPrincipal() . |
| 118 | * <p> |
| 119 | * Retry means that another HTTP exchange is required. Any response |
| 120 | * headers needing to be sent back to the client are set in the |
| 121 | * given HttpExchange. The response code to be returned must be provided |
| 122 | * in the Retry object. Retry may occur multiple times. |
| 123 | */ |
| 124 | public abstract Result authenticate (HttpExchange exch); |
| 125 | } |