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 }