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.hc.client5.http.auth;
29
30 /**
31 * Authentication schemes by their names supported by the HttpClient.
32 *
33 * @since 4.3
34 */
35 public final class StandardAuthScheme {
36
37 private StandardAuthScheme() {
38 // no instances
39 }
40
41 /**
42 * Basic authentication scheme as defined in RFC 2617 (considered inherently
43 * insecure without transport encryption, but most widely supported).
44 */
45 public static final String BASIC = "Basic";
46
47 /**
48 * Digest authentication scheme as defined in RFC 2617.
49 */
50 public static final String DIGEST = "Digest";
51
52 /**
53 * The NTLM authentication scheme is a proprietary Microsoft Windows
54 * authentication protocol as defined in [MS-NLMP].
55 */
56 public static final String NTLM = "NTLM";
57
58 /**
59 * SPNEGO authentication scheme as defined in RFC 4559 and RFC 4178
60 * (considered to be the most secure among currently supported
61 * authentication schemes if Kerberos is selected).
62 */
63 public static final String SPNEGO = "Negotiate";
64
65 /**
66 * Kerberos authentication scheme as defined in RFC 4120
67 * (considered to be the most secure among currently supported
68 * authentication schemes).
69 */
70 public static final String KERBEROS = "Kerberos";
71
72 }