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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
// Copyright 2014 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 "remoting/host/token_validator_base.h"
#include "base/base64.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/json/json_reader.h"
#include "base/logging.h"
#include "base/memory/weak_ptr.h"
#include "base/single_thread_task_runner.h"
#include "base/strings/string_util.h"
#include "base/values.h"
#include "net/base/escape.h"
#include "net/base/io_buffer.h"
#include "net/base/request_priority.h"
#include "net/base/upload_bytes_element_reader.h"
#include "net/base/upload_data_stream.h"
#include "net/ssl/client_cert_store.h"
#if defined(USE_NSS_CERTS)
#include "net/ssl/client_cert_store_nss.h"
#elif defined(OS_WIN)
#include "net/ssl/client_cert_store_win.h"
#elif defined(OS_MACOSX)
#include "net/ssl/client_cert_store_mac.h"
#endif
#include "net/ssl/ssl_cert_request_info.h"
#include "net/url_request/url_request.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_status.h"
#include "url/gurl.h"
namespace {
const int kBufferSize = 4096;
const char kCertIssuerWildCard[] = "*";
} // namespace
namespace remoting {
TokenValidatorBase::TokenValidatorBase(
const ThirdPartyAuthConfig& third_party_auth_config,
const std::string& token_scope,
scoped_refptr<net::URLRequestContextGetter> request_context_getter)
: third_party_auth_config_(third_party_auth_config),
token_scope_(token_scope),
request_context_getter_(request_context_getter),
buffer_(new net::IOBuffer(kBufferSize)),
weak_factory_(this) {
DCHECK(third_party_auth_config_.token_url.is_valid());
DCHECK(third_party_auth_config_.token_validation_url.is_valid());
}
TokenValidatorBase::~TokenValidatorBase() {
}
// TokenValidator interface.
void TokenValidatorBase::ValidateThirdPartyToken(
const std::string& token,
const base::Callback<void(
const std::string& shared_secret)>& on_token_validated) {
DCHECK(!request_);
DCHECK(!on_token_validated.is_null());
on_token_validated_ = on_token_validated;
StartValidateRequest(token);
}
const GURL& TokenValidatorBase::token_url() const {
return third_party_auth_config_.token_url;
}
const std::string& TokenValidatorBase::token_scope() const {
return token_scope_;
}
// URLFetcherDelegate interface.
void TokenValidatorBase::OnResponseStarted(net::URLRequest* source) {
DCHECK_EQ(request_.get(), source);
int bytes_read = 0;
request_->Read(buffer_.get(), kBufferSize, &bytes_read);
OnReadCompleted(request_.get(), bytes_read);
}
void TokenValidatorBase::OnReadCompleted(net::URLRequest* source,
int bytes_read) {
DCHECK_EQ(request_.get(), source);
do {
if (!request_->status().is_success() || bytes_read <= 0)
break;
data_.append(buffer_->data(), bytes_read);
} while (request_->Read(buffer_.get(), kBufferSize, &bytes_read));
const net::URLRequestStatus status = request_->status();
if (!status.is_io_pending()) {
std::string shared_token = ProcessResponse();
request_.reset();
on_token_validated_.Run(shared_token);
}
}
void TokenValidatorBase::OnCertificateRequested(
net::URLRequest* source,
net::SSLCertRequestInfo* cert_request_info) {
DCHECK_EQ(request_.get(), source);
net::ClientCertStore* client_cert_store;
#if defined(USE_NSS_CERTS)
client_cert_store = new net::ClientCertStoreNSS(
net::ClientCertStoreNSS::PasswordDelegateFactory());
#elif defined(OS_WIN)
// The network process is running as "Local Service" whose "Current User"
// cert store doesn't contain any certificates. Use the "Local Machine"
// store instead.
// The ACL on the private key of the machine certificate in the "Local
// Machine" cert store needs to allow access by "Local Service".
HCERTSTORE cert_store = ::CertOpenStore(
CERT_STORE_PROV_SYSTEM, 0, NULL,
CERT_SYSTEM_STORE_LOCAL_MACHINE | CERT_STORE_READONLY_FLAG, L"MY");
client_cert_store = new net::ClientCertStoreWin(cert_store);
#elif defined(OS_MACOSX)
client_cert_store = new net::ClientCertStoreMac();
#elif defined(USE_OPENSSL)
// OpenSSL does not use the ClientCertStore infrastructure.
client_cert_store = nullptr;
#else
#error Unknown platform.
#endif
// The callback is uncancellable, and GetClientCert requires selected_certs
// and client_cert_store to stay alive until the callback is called. So we
// must give it a WeakPtr for |this|, and ownership of the other parameters.
net::CertificateList* selected_certs(new net::CertificateList());
client_cert_store->GetClientCerts(
*cert_request_info, selected_certs,
base::Bind(&TokenValidatorBase::OnCertificatesSelected,
weak_factory_.GetWeakPtr(), base::Owned(selected_certs),
base::Owned(client_cert_store)));
}
void TokenValidatorBase::OnCertificatesSelected(
net::CertificateList* selected_certs,
net::ClientCertStore* unused) {
const std::string& issuer =
third_party_auth_config_.token_validation_cert_issuer;
if (request_) {
for (size_t i = 0; i < selected_certs->size(); ++i) {
if (issuer == kCertIssuerWildCard ||
issuer == (*selected_certs)[i]->issuer().common_name) {
request_->ContinueWithCertificate((*selected_certs)[i].get());
return;
}
}
request_->ContinueWithCertificate(nullptr);
}
}
bool TokenValidatorBase::IsValidScope(const std::string& token_scope) {
// TODO(rmsousa): Deal with reordering/subsets/supersets/aliases/etc.
return token_scope == token_scope_;
}
std::string TokenValidatorBase::ProcessResponse() {
// Verify that we got a successful response.
net::URLRequestStatus status = request_->status();
if (!status.is_success()) {
LOG(ERROR) << "Error validating token, status=" << status.status()
<< " err=" << status.error();
return std::string();
}
int response = request_->GetResponseCode();
if (response != 200) {
LOG(ERROR)
<< "Error " << response << " validating token: '" << data_ << "'";
return std::string();
}
// Decode the JSON data from the response.
scoped_ptr<base::Value> value = base::JSONReader::Read(data_);
base::DictionaryValue* dict;
if (!value || !value->GetAsDictionary(&dict)) {
LOG(ERROR) << "Invalid token validation response: '" << data_ << "'";
return std::string();
}
std::string token_scope;
dict->GetStringWithoutPathExpansion("scope", &token_scope);
if (!IsValidScope(token_scope)) {
LOG(ERROR) << "Invalid scope: '" << token_scope
<< "', expected: '" << token_scope_ <<"'.";
return std::string();
}
std::string shared_secret;
// Everything is valid, so return the shared secret to the caller.
dict->GetStringWithoutPathExpansion("access_token", &shared_secret);
return shared_secret;
}
} // namespace remoting
|
