1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27
28 package org.apache.http.client.config;
29
30 /**
31 * Standard authentication schemes supported by HttpClient.
32 *
33 * @since 4.3
34 */
35 public final class AuthSchemes {
36
37 /**
38 * Basic authentication scheme as defined in RFC 2617 (considered inherently
39 * insecure, but most widely supported).
40 */
41 public static final String BASIC = "Basic";
42
43 /**
44 * Digest authentication scheme as defined in RFC 2617.
45 */
46 public static final String DIGEST = "Digest";
47
48 /**
49 * The NTLM authentication scheme is a proprietary Microsoft Windows
50 * authentication protocol as defined in [MS-NLMP].
51 */
52 public static final String NTLM = "NTLM";
53
54 /**
55 * SPNEGO authentication scheme as defined in RFC 4559 and RFC 4178
56 * (considered to be the most secure among currently supported
57 * authentication schemes if Kerberos is selected).
58 */
59 public static final String SPNEGO = "Negotiate";
60
61 /**
62 * Kerberos authentication scheme as defined in RFC 4120
63 * (considered to be the most secure among currently supported
64 * authentication schemes).
65 */
66 public static final String KERBEROS = "Kerberos";
67
68 /**
69 * CredSSP authentication scheme defined in [MS-CSSP].
70 */
71 public static final String CREDSSP = "CredSSP";
72
73 private AuthSchemes() {
74 }
75
76 }