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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
// 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 "extensions/browser/content_verifier.h"
#include <algorithm>
#include "base/files/file_path.h"
#include "base/stl_util.h"
#include "content/public/browser/browser_thread.h"
#include "extensions/browser/content_hash_fetcher.h"
#include "extensions/browser/content_hash_reader.h"
#include "extensions/browser/content_verifier_delegate.h"
#include "extensions/browser/content_verifier_io_data.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/common/constants.h"
#include "extensions/common/extension_l10n_util.h"
namespace extensions {
ContentVerifier::ContentVerifier(content::BrowserContext* context,
ContentVerifierDelegate* delegate)
: shutdown_(false),
context_(context),
delegate_(delegate),
fetcher_(new ContentHashFetcher(
context,
delegate,
base::Bind(&ContentVerifier::OnFetchComplete, this))),
observer_(this),
io_data_(new ContentVerifierIOData) {
}
ContentVerifier::~ContentVerifier() {
}
void ContentVerifier::Start() {
ExtensionRegistry* registry = ExtensionRegistry::Get(context_);
observer_.Add(registry);
}
void ContentVerifier::Shutdown() {
shutdown_ = true;
content::BrowserThread::PostTask(
content::BrowserThread::IO,
FROM_HERE,
base::Bind(&ContentVerifierIOData::Clear, io_data_));
observer_.RemoveAll();
fetcher_.reset();
}
ContentVerifyJob* ContentVerifier::CreateJobFor(
const std::string& extension_id,
const base::FilePath& extension_root,
const base::FilePath& relative_path) {
DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
const ContentVerifierIOData::ExtensionData* data =
io_data_->GetData(extension_id);
if (!data)
return NULL;
std::set<base::FilePath> paths;
paths.insert(relative_path);
if (!ShouldVerifyAnyPaths(extension_id, extension_root, paths))
return NULL;
// TODO(asargent) - we can probably get some good performance wins by having
// a cache of ContentHashReader's that we hold onto past the end of each job.
return new ContentVerifyJob(
new ContentHashReader(extension_id,
data->version,
extension_root,
relative_path,
delegate_->PublicKey()),
base::Bind(&ContentVerifier::VerifyFailed, this, extension_id));
}
void ContentVerifier::VerifyFailed(const std::string& extension_id,
ContentVerifyJob::FailureReason reason) {
if (!content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)) {
content::BrowserThread::PostTask(
content::BrowserThread::UI,
FROM_HERE,
base::Bind(&ContentVerifier::VerifyFailed, this, extension_id, reason));
return;
}
if (shutdown_)
return;
VLOG(1) << "VerifyFailed " << extension_id << " reason:" << reason;
ExtensionRegistry* registry = ExtensionRegistry::Get(context_);
const Extension* extension =
registry->GetExtensionById(extension_id, ExtensionRegistry::EVERYTHING);
if (!extension)
return;
if (reason == ContentVerifyJob::MISSING_ALL_HASHES) {
// If we failed because there were no hashes yet for this extension, just
// request some.
fetcher_->DoFetch(extension, true /* force */);
} else {
delegate_->VerifyFailed(extension_id);
}
}
void ContentVerifier::OnExtensionLoaded(
content::BrowserContext* browser_context,
const Extension* extension) {
if (shutdown_)
return;
ContentVerifierDelegate::Mode mode = delegate_->ShouldBeVerified(*extension);
if (mode != ContentVerifierDelegate::NONE) {
scoped_ptr<ContentVerifierIOData::ExtensionData> data(
new ContentVerifierIOData::ExtensionData(
delegate_->GetBrowserImagePaths(extension),
extension->version() ? *extension->version() : base::Version()));
content::BrowserThread::PostTask(content::BrowserThread::IO,
FROM_HERE,
base::Bind(&ContentVerifierIOData::AddData,
io_data_,
extension->id(),
base::Passed(&data)));
fetcher_->ExtensionLoaded(extension);
}
}
void ContentVerifier::OnExtensionUnloaded(
content::BrowserContext* browser_context,
const Extension* extension,
UnloadedExtensionInfo::Reason reason) {
if (shutdown_)
return;
content::BrowserThread::PostTask(
content::BrowserThread::IO,
FROM_HERE,
base::Bind(
&ContentVerifierIOData::RemoveData, io_data_, extension->id()));
if (fetcher_)
fetcher_->ExtensionUnloaded(extension);
}
void ContentVerifier::OnFetchCompleteHelper(const std::string& extension_id,
bool shouldVerifyAnyPathsResult) {
if (shouldVerifyAnyPathsResult)
delegate_->VerifyFailed(extension_id);
}
void ContentVerifier::OnFetchComplete(
const std::string& extension_id,
bool success,
bool was_force_check,
const std::set<base::FilePath>& hash_mismatch_paths) {
if (shutdown_)
return;
VLOG(1) << "OnFetchComplete " << extension_id << " success:" << success;
ExtensionRegistry* registry = ExtensionRegistry::Get(context_);
const Extension* extension =
registry->GetExtensionById(extension_id, ExtensionRegistry::EVERYTHING);
if (!delegate_ || !extension)
return;
ContentVerifierDelegate::Mode mode = delegate_->ShouldBeVerified(*extension);
if (was_force_check && !success &&
mode == ContentVerifierDelegate::ENFORCE_STRICT) {
// We weren't able to get verified_contents.json or weren't able to compute
// hashes.
delegate_->VerifyFailed(extension_id);
} else {
content::BrowserThread::PostTaskAndReplyWithResult(
content::BrowserThread::IO,
FROM_HERE,
base::Bind(&ContentVerifier::ShouldVerifyAnyPaths,
this,
extension_id,
extension->path(),
hash_mismatch_paths),
base::Bind(
&ContentVerifier::OnFetchCompleteHelper, this, extension_id));
}
}
bool ContentVerifier::ShouldVerifyAnyPaths(
const std::string& extension_id,
const base::FilePath& extension_root,
const std::set<base::FilePath>& relative_paths) {
DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
const ContentVerifierIOData::ExtensionData* data =
io_data_->GetData(extension_id);
if (!data)
return false;
const std::set<base::FilePath>& browser_images = data->browser_image_paths;
base::FilePath locales_dir = extension_root.Append(kLocaleFolder);
scoped_ptr<std::set<std::string> > all_locales;
for (std::set<base::FilePath>::const_iterator i = relative_paths.begin();
i != relative_paths.end();
++i) {
const base::FilePath& relative_path = *i;
if (relative_path == base::FilePath(kManifestFilename))
continue;
if (ContainsKey(browser_images, relative_path))
continue;
base::FilePath full_path = extension_root.Append(relative_path);
if (locales_dir.IsParent(full_path)) {
if (!all_locales) {
// TODO(asargent) - see if we can cache this list longer to avoid
// having to fetch it more than once for a given run of the
// browser. Maybe it can never change at runtime? (Or if it can, maybe
// there is an event we can listen for to know to drop our cache).
all_locales.reset(new std::set<std::string>);
extension_l10n_util::GetAllLocales(all_locales.get());
}
// Since message catalogs get transcoded during installation, we want
// to skip those paths.
if (full_path.DirName().DirName() == locales_dir &&
!extension_l10n_util::ShouldSkipValidation(
locales_dir, full_path.DirName(), *all_locales))
continue;
}
return true;
}
return false;
}
} // namespace extensions
|
