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
142
143
144
145
146
147
148
149
150
|
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/http/http_auth.h"
#include <algorithm>
#include "base/basictypes.h"
#include "base/strings/string_tokenizer.h"
#include "base/strings/string_util.h"
#include "net/base/net_errors.h"
#include "net/http/http_auth_challenge_tokenizer.h"
#include "net/http/http_auth_handler.h"
#include "net/http/http_auth_handler_factory.h"
#include "net/http/http_request_headers.h"
#include "net/http/http_response_headers.h"
#include "net/http/http_util.h"
namespace net {
HttpAuth::Identity::Identity() : source(IDENT_SRC_NONE), invalid(true) {}
// static
void HttpAuth::ChooseBestChallenge(
HttpAuthHandlerFactory* http_auth_handler_factory,
const HttpResponseHeaders* headers,
Target target,
const GURL& origin,
const std::set<Scheme>& disabled_schemes,
const BoundNetLog& net_log,
scoped_ptr<HttpAuthHandler>* handler) {
DCHECK(http_auth_handler_factory);
DCHECK(handler->get() == NULL);
// Choose the challenge whose authentication handler gives the maximum score.
scoped_ptr<HttpAuthHandler> best;
const std::string header_name = GetChallengeHeaderName(target);
std::string cur_challenge;
void* iter = NULL;
while (headers->EnumerateHeader(&iter, header_name, &cur_challenge)) {
scoped_ptr<HttpAuthHandler> cur;
int rv = http_auth_handler_factory->CreateAuthHandlerFromString(
cur_challenge, target, origin, net_log, &cur);
if (rv != OK) {
VLOG(1) << "Unable to create AuthHandler. Status: "
<< ErrorToString(rv) << " Challenge: " << cur_challenge;
continue;
}
if (cur.get() && (!best.get() || best->score() < cur->score()) &&
(disabled_schemes.find(cur->auth_scheme()) == disabled_schemes.end()))
best.swap(cur);
}
handler->swap(best);
}
// static
HttpAuth::AuthorizationResult HttpAuth::HandleChallengeResponse(
HttpAuthHandler* handler,
const HttpResponseHeaders* headers,
Target target,
const std::set<Scheme>& disabled_schemes,
std::string* challenge_used) {
DCHECK(handler);
DCHECK(headers);
DCHECK(challenge_used);
challenge_used->clear();
HttpAuth::Scheme current_scheme = handler->auth_scheme();
if (disabled_schemes.find(current_scheme) != disabled_schemes.end())
return HttpAuth::AUTHORIZATION_RESULT_REJECT;
std::string current_scheme_name = SchemeToString(current_scheme);
const std::string header_name = GetChallengeHeaderName(target);
void* iter = NULL;
std::string challenge;
HttpAuth::AuthorizationResult authorization_result =
HttpAuth::AUTHORIZATION_RESULT_INVALID;
while (headers->EnumerateHeader(&iter, header_name, &challenge)) {
HttpAuthChallengeTokenizer props(challenge.begin(), challenge.end());
if (!base::LowerCaseEqualsASCII(props.scheme(),
current_scheme_name.c_str()))
continue;
authorization_result = handler->HandleAnotherChallenge(&props);
if (authorization_result != HttpAuth::AUTHORIZATION_RESULT_INVALID) {
*challenge_used = challenge;
return authorization_result;
}
}
// Finding no matches is equivalent to rejection.
return HttpAuth::AUTHORIZATION_RESULT_REJECT;
}
// static
std::string HttpAuth::GetChallengeHeaderName(Target target) {
switch (target) {
case AUTH_PROXY:
return "Proxy-Authenticate";
case AUTH_SERVER:
return "WWW-Authenticate";
default:
NOTREACHED();
return std::string();
}
}
// static
std::string HttpAuth::GetAuthorizationHeaderName(Target target) {
switch (target) {
case AUTH_PROXY:
return HttpRequestHeaders::kProxyAuthorization;
case AUTH_SERVER:
return HttpRequestHeaders::kAuthorization;
default:
NOTREACHED();
return std::string();
}
}
// static
std::string HttpAuth::GetAuthTargetString(Target target) {
switch (target) {
case AUTH_PROXY:
return "proxy";
case AUTH_SERVER:
return "server";
default:
NOTREACHED();
return std::string();
}
}
// static
const char* HttpAuth::SchemeToString(Scheme scheme) {
static const char* const kSchemeNames[] = {
"basic",
"digest",
"ntlm",
"negotiate",
"spdyproxy",
"mock",
};
static_assert(arraysize(kSchemeNames) == AUTH_SCHEME_MAX,
"http auth scheme names incorrect size");
if (scheme < AUTH_SCHEME_BASIC || scheme >= AUTH_SCHEME_MAX) {
NOTREACHED();
return "invalid_scheme";
}
return kSchemeNames[scheme];
}
} // namespace net
|
