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
|
// Copyright 2013 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 "chrome/browser/extensions/blacklist_state_fetcher.h"
#include "base/strings/stringprintf.h"
#include "base/threading/thread_task_runner_handle.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/safe_browsing/safe_browsing_service.h"
#include "chrome/common/safe_browsing/crx_info.pb.h"
#include "components/safe_browsing/db/v4_protocol_manager_util.h"
#include "content/public/browser/browser_thread.h"
#include "net/base/escape.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
#include "net/url_request/url_request_status.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
#include "services/network/public/cpp/simple_url_loader.h"
#include "url/gurl.h"
using content::BrowserThread;
namespace extensions {
BlacklistStateFetcher::BlacklistStateFetcher() : weak_ptr_factory_(this) {}
BlacklistStateFetcher::~BlacklistStateFetcher() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
}
void BlacklistStateFetcher::Request(const std::string& id,
const RequestCallback& callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!safe_browsing_config_) {
if (g_browser_process && g_browser_process->safe_browsing_service()) {
SetSafeBrowsingConfig(
g_browser_process->safe_browsing_service()->GetV4ProtocolConfig());
} else {
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(callback, BLACKLISTED_UNKNOWN));
return;
}
}
bool request_already_sent = base::ContainsKey(callbacks_, id);
callbacks_.insert(std::make_pair(id, callback));
if (request_already_sent)
return;
if (g_browser_process && g_browser_process->safe_browsing_service()) {
url_loader_factory_ =
g_browser_process->safe_browsing_service()->GetURLLoaderFactory();
}
SendRequest(id);
}
void BlacklistStateFetcher::SendRequest(const std::string& id) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
ClientCRXListInfoRequest request;
request.set_id(id);
std::string request_str;
request.SerializeToString(&request_str);
GURL request_url = GURL(safe_browsing::GetReportUrl(
*safe_browsing_config_, "clientreport/crx-list-info"));
net::NetworkTrafficAnnotationTag traffic_annotation =
net::DefineNetworkTrafficAnnotation("extension_blacklist", R"(
semantics {
sender: "Extension Blacklist"
description:
"Chromium protects the users from malicious extensions by checking "
"extensions that are being installed or have been installed "
"against a list of known malwares. Chromium sends the identifiers "
"of extensions to Google and Google responds with whether it "
"believes each extension is malware or not. Only extensions that "
"match the safe browsing blacklist can trigger this request."
trigger:
"When extensions are being installed and at startup when existing "
"extensions are scanned."
data: "The identifier of the installed extension."
destination: GOOGLE_OWNED_SERVICE
}
policy {
cookies_allowed: YES
cookies_store: "Safe Browsing cookies store"
setting:
"Users can enable or disable this feature by toggling 'Protect you "
"and your device from dangerous sites' in Chromium settings under "
"Privacy. This feature is enabled by default."
chrome_policy {
SafeBrowsingEnabled {
policy_options {mode: MANDATORY}
SafeBrowsingEnabled: false
}
}
})");
auto resource_request = std::make_unique<network::ResourceRequest>();
resource_request->url = request_url;
resource_request->method = "POST";
std::unique_ptr<network::SimpleURLLoader> fetcher_ptr =
network::SimpleURLLoader::Create(std::move(resource_request),
traffic_annotation);
auto* fetcher = fetcher_ptr.get();
fetcher->AttachStringForUpload(request_str, "application/octet-stream");
requests_[fetcher] = {std::move(fetcher_ptr), id};
fetcher->DownloadToStringOfUnboundedSizeUntilCrashAndDie(
url_loader_factory_.get(),
base::BindOnce(&BlacklistStateFetcher::OnURLLoaderComplete,
base::Unretained(this), fetcher));
}
void BlacklistStateFetcher::SetSafeBrowsingConfig(
const safe_browsing::V4ProtocolConfig& config) {
safe_browsing_config_ =
std::make_unique<safe_browsing::V4ProtocolConfig>(config);
}
void BlacklistStateFetcher::OnURLLoaderComplete(
network::SimpleURLLoader* url_loader,
std::unique_ptr<std::string> response_body) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
int response_code = 0;
if (url_loader->ResponseInfo() && url_loader->ResponseInfo()->headers)
response_code = url_loader->ResponseInfo()->headers->response_code();
std::string response_body_str;
if (response_body.get())
response_body_str = std::move(*response_body.get());
OnURLLoaderCompleteInternal(url_loader, response_body_str, response_code,
url_loader->NetError());
}
void BlacklistStateFetcher::OnURLLoaderCompleteInternal(
network::SimpleURLLoader* url_loader,
const std::string& response_body,
int response_code,
int net_error) {
auto it = requests_.find(url_loader);
if (it == requests_.end()) {
NOTREACHED();
return;
}
std::unique_ptr<network::SimpleURLLoader> loader =
std::move(it->second.first);
std::string id = it->second.second;
requests_.erase(it);
BlacklistState state;
if (net_error == net::OK && response_code == 200) {
ClientCRXListInfoResponse response;
if (response.ParseFromString(response_body)) {
state = static_cast<BlacklistState>(response.verdict());
} else {
state = BLACKLISTED_UNKNOWN;
}
} else {
if (net_error != net::OK) {
VLOG(1) << "Blacklist request for: " << id
<< " failed with error: " << net_error;
} else {
VLOG(1) << "Blacklist request for: " << id
<< " failed with error: " << response_code;
}
state = BLACKLISTED_UNKNOWN;
}
std::pair<CallbackMultiMap::iterator, CallbackMultiMap::iterator> range =
callbacks_.equal_range(id);
for (CallbackMultiMap::const_iterator callback_it = range.first;
callback_it != range.second; ++callback_it) {
callback_it->second.Run(state);
}
callbacks_.erase(range.first, range.second);
}
} // namespace extensions
|
