1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tomcat.util.http.parser;
import java.io.IOException;
import java.io.StringReader;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
/**
* Parser for an "Authorization" header.
*/
public class Authorization {
@SuppressWarnings("unused") // Unused due to buggy client implementations
private static final Integer FIELD_TYPE_TOKEN = Integer.valueOf(0);
private static final Integer FIELD_TYPE_QUOTED_STRING = Integer.valueOf(1);
private static final Integer FIELD_TYPE_TOKEN_OR_QUOTED_STRING = Integer.valueOf(2);
private static final Integer FIELD_TYPE_LHEX = Integer.valueOf(3);
private static final Integer FIELD_TYPE_QUOTED_TOKEN = Integer.valueOf(4);
private static final Map<String,Integer> fieldTypes = new HashMap<>();
static {
// Digest field types.
// Note: These are more relaxed than RFC2617. This adheres to the
// recommendation of RFC2616 that servers are tolerant of buggy
// clients when they can be so without ambiguity.
fieldTypes.put("username", FIELD_TYPE_QUOTED_STRING);
fieldTypes.put("realm", FIELD_TYPE_QUOTED_STRING);
fieldTypes.put("nonce", FIELD_TYPE_QUOTED_STRING);
fieldTypes.put("digest-uri", FIELD_TYPE_QUOTED_STRING);
// RFC2617 says response is <">32LHEX<">. 32LHEX will also be accepted
fieldTypes.put("response", FIELD_TYPE_LHEX);
// RFC2617 says algorithm is token. <">token<"> will also be accepted
fieldTypes.put("algorithm", FIELD_TYPE_QUOTED_TOKEN);
fieldTypes.put("cnonce", FIELD_TYPE_QUOTED_STRING);
fieldTypes.put("opaque", FIELD_TYPE_QUOTED_STRING);
// RFC2617 says qop is token. <">token<"> will also be accepted
fieldTypes.put("qop", FIELD_TYPE_QUOTED_TOKEN);
// RFC2617 says nc is 8LHEX. <">8LHEX<"> will also be accepted
fieldTypes.put("nc", FIELD_TYPE_LHEX);
}
/**
* Parses an HTTP Authorization header for DIGEST authentication as per RFC
* 2617 section 3.2.2.
*
* @param input The header value to parse
*
* @return A map of directives and values as {@link String}s or
* <code>null</code> if a parsing error occurs. Although the
* values returned are {@link String}s they will have been
* validated to ensure that they conform to RFC 2617.
*
* @throws IllegalArgumentException If the header does not conform to RFC
* 2617
* @throws java.io.IOException If an error occurs while reading the input
*/
public static Map<String,String> parseAuthorizationDigest (StringReader input)
throws IllegalArgumentException, IOException {
Map<String,String> result = new HashMap<>();
if (HttpParser.skipConstant(input, "Digest") != SkipResult.FOUND) {
return null;
}
// All field names are valid tokens
String field = HttpParser.readToken(input);
if (field == null) {
return null;
}
while (!field.equals("")) {
if (HttpParser.skipConstant(input, "=") != SkipResult.FOUND) {
return null;
}
String value;
Integer type = fieldTypes.get(field.toLowerCase(Locale.ENGLISH));
if (type == null) {
// auth-param = token "=" ( token | quoted-string )
type = FIELD_TYPE_TOKEN_OR_QUOTED_STRING;
}
switch (type.intValue()) {
case 0:
// FIELD_TYPE_TOKEN
value = HttpParser.readToken(input);
break;
case 1:
// FIELD_TYPE_QUOTED_STRING
value = HttpParser.readQuotedString(input, false);
break;
case 2:
// FIELD_TYPE_TOKEN_OR_QUOTED_STRING
value = HttpParser.readTokenOrQuotedString(input, false);
break;
case 3:
// FIELD_TYPE_LHEX
value = HttpParser.readLhex(input);
break;
case 4:
// FIELD_TYPE_QUOTED_TOKEN
value = HttpParser.readQuotedToken(input);
break;
default:
// Error
throw new IllegalArgumentException("TODO i18n: Unsupported type");
}
if (value == null) {
return null;
}
result.put(field, value);
if (HttpParser.skipConstant(input, ",") == SkipResult.NOT_FOUND) {
return null;
}
field = HttpParser.readToken(input);
if (field == null) {
return null;
}
}
return result;
}
}
|
