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comparison: mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/auth/AuthSchemeBase.java

mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/auth/AuthSchemeBase.java

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TOR_BUG_3246
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1 /*
2 * ====================================================================
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one or more
5 * contributor license agreements. See the NOTICE file distributed with
6 * this work for additional information regarding copyright ownership.
7 * The ASF licenses this file to You under the Apache License, Version 2.0
8 * (the "License"); you may not use this file except in compliance with
9 * 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, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ====================================================================
19 *
20 * This software consists of voluntary contributions made by many
21 * individuals on behalf of the Apache Software Foundation. For more
22 * information on the Apache Software Foundation, please see
23 * <http://www.apache.org/>.
24 *
25 */
26
27 package ch.boye.httpclientandroidlib.impl.auth;
28
29 import ch.boye.httpclientandroidlib.annotation.NotThreadSafe;
30
31 import ch.boye.httpclientandroidlib.FormattedHeader;
32 import ch.boye.httpclientandroidlib.Header;
33 import ch.boye.httpclientandroidlib.HttpRequest;
34 import ch.boye.httpclientandroidlib.auth.AUTH;
35 import ch.boye.httpclientandroidlib.auth.AuthenticationException;
36 import ch.boye.httpclientandroidlib.auth.ContextAwareAuthScheme;
37 import ch.boye.httpclientandroidlib.auth.Credentials;
38 import ch.boye.httpclientandroidlib.auth.MalformedChallengeException;
39 import ch.boye.httpclientandroidlib.protocol.HTTP;
40 import ch.boye.httpclientandroidlib.protocol.HttpContext;
41 import ch.boye.httpclientandroidlib.util.CharArrayBuffer;
42
43 /**
44 * Abstract authentication scheme class that serves as a basis
45 * for all authentication schemes supported by HttpClient. This class
46 * defines the generic way of parsing an authentication challenge. It
47 * does not make any assumptions regarding the format of the challenge
48 * nor does it impose any specific way of responding to that challenge.
49 *
50 *
51 * @since 4.0
52 */
53 @NotThreadSafe // proxy
54 public abstract class AuthSchemeBase implements ContextAwareAuthScheme {
55
56 /**
57 * Flag whether authenticating against a proxy.
58 */
59 private boolean proxy;
60
61 public AuthSchemeBase() {
62 super();
63 }
64
65 /**
66 * Processes the given challenge token. Some authentication schemes
67 * may involve multiple challenge-response exchanges. Such schemes must be able
68 * to maintain the state information when dealing with sequential challenges
69 *
70 * @param header the challenge header
71 *
72 * @throws MalformedChallengeException is thrown if the authentication challenge
73 * is malformed
74 */
75 public void processChallenge(final Header header) throws MalformedChallengeException {
76 if (header == null) {
77 throw new IllegalArgumentException("Header may not be null");
78 }
79 String authheader = header.getName();
80 if (authheader.equalsIgnoreCase(AUTH.WWW_AUTH)) {
81 this.proxy = false;
82 } else if (authheader.equalsIgnoreCase(AUTH.PROXY_AUTH)) {
83 this.proxy = true;
84 } else {
85 throw new MalformedChallengeException("Unexpected header name: " + authheader);
86 }
87
88 CharArrayBuffer buffer;
89 int pos;
90 if (header instanceof FormattedHeader) {
91 buffer = ((FormattedHeader) header).getBuffer();
92 pos = ((FormattedHeader) header).getValuePos();
93 } else {
94 String s = header.getValue();
95 if (s == null) {
96 throw new MalformedChallengeException("Header value is null");
97 }
98 buffer = new CharArrayBuffer(s.length());
99 buffer.append(s);
100 pos = 0;
101 }
102 while (pos < buffer.length() && HTTP.isWhitespace(buffer.charAt(pos))) {
103 pos++;
104 }
105 int beginIndex = pos;
106 while (pos < buffer.length() && !HTTP.isWhitespace(buffer.charAt(pos))) {
107 pos++;
108 }
109 int endIndex = pos;
110 String s = buffer.substring(beginIndex, endIndex);
111 if (!s.equalsIgnoreCase(getSchemeName())) {
112 throw new MalformedChallengeException("Invalid scheme identifier: " + s);
113 }
114
115 parseChallenge(buffer, pos, buffer.length());
116 }
117
118
119 @SuppressWarnings("deprecation")
120 public Header authenticate(
121 final Credentials credentials,
122 final HttpRequest request,
123 final HttpContext context) throws AuthenticationException {
124 return authenticate(credentials, request);
125 }
126
127 protected abstract void parseChallenge(
128 CharArrayBuffer buffer, int beginIndex, int endIndex) throws MalformedChallengeException;
129
130 /**
131 * Returns <code>true</code> if authenticating against a proxy, <code>false</code>
132 * otherwise.
133 *
134 * @return <code>true</code> if authenticating against a proxy, <code>false</code>
135 * otherwise
136 */
137 public boolean isProxy() {
138 return this.proxy;
139 }
140
141 @Override
142 public String toString() {
143 return getSchemeName();
144 }
145
146 }

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