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
|
// Copyright (c) 2010 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/external_pref_extension_provider.h"
#include "app/app_paths.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/path_service.h"
#include "base/string_util.h"
#include "base/utf_string_conversions.h"
#include "base/version.h"
#include "chrome/common/json_value_serializer.h"
// Constants for keeping track of extension preferences.
const char kLocation[] = "location";
const char kState[] = "state";
const char kExternalCrx[] = "external_crx";
const char kExternalVersion[] = "external_version";
const char kExternalUpdateUrl[] = "external_update_url";
ExternalPrefExtensionProvider::ExternalPrefExtensionProvider() {
FilePath json_file;
PathService::Get(app::DIR_EXTERNAL_EXTENSIONS, &json_file);
json_file = json_file.Append(FILE_PATH_LITERAL("external_extensions.json"));
if (file_util::PathExists(json_file)) {
JSONFileValueSerializer serializer(json_file);
SetPreferences(&serializer);
} else {
prefs_.reset(new DictionaryValue());
}
}
ExternalPrefExtensionProvider::~ExternalPrefExtensionProvider() {
}
void ExternalPrefExtensionProvider::SetPreferencesForTesting(
const std::string& json_data_for_testing) {
JSONStringValueSerializer serializer(json_data_for_testing);
SetPreferences(&serializer);
}
void ExternalPrefExtensionProvider::VisitRegisteredExtension(
Visitor* visitor, const std::set<std::string>& ids_to_ignore) const {
for (DictionaryValue::key_iterator i = prefs_->begin_keys();
i != prefs_->end_keys(); ++i) {
const std::string& extension_id = *i;
if (ids_to_ignore.find(extension_id) != ids_to_ignore.end())
continue;
DictionaryValue* extension;
if (!prefs_->GetDictionaryWithoutPathExpansion(extension_id, &extension))
continue;
FilePath::StringType external_crx;
std::string external_version;
std::string external_update_url;
bool has_external_crx = extension->GetString(kExternalCrx, &external_crx);
bool has_external_version = extension->GetString(kExternalVersion,
&external_version);
bool has_external_update_url = extension->GetString(kExternalUpdateUrl,
&external_update_url);
if (has_external_crx != has_external_version) {
LOG(WARNING) << "Malformed extension dictionary for extension: "
<< extension_id.c_str() << ". " << kExternalCrx
<< " and " << kExternalVersion << " must be used together.";
continue;
}
if (has_external_crx == has_external_update_url) {
LOG(WARNING) << "Malformed extension dictionary for extension: "
<< extension_id.c_str() << ". Exactly one of the "
<< "followng keys should be used: " << kExternalCrx
<< ", " << kExternalUpdateUrl << ".";
continue;
}
if (has_external_crx) {
if (external_crx.find(FilePath::kParentDirectory) !=
base::StringPiece::npos) {
LOG(WARNING) << "Path traversal not allowed in path: "
<< external_crx.c_str();
continue;
}
// If the path is relative, make it absolute.
FilePath path(external_crx);
if (!path.IsAbsolute()) {
// Try path as relative path from external extension dir.
FilePath base_path;
PathService::Get(app::DIR_EXTERNAL_EXTENSIONS, &base_path);
path = base_path.Append(external_crx);
}
scoped_ptr<Version> version;
version.reset(Version::GetVersionFromString(external_version));
if (!version.get()) {
LOG(ERROR) << "Malformed extension dictionary for extension: "
<< extension_id.c_str() << ". Invalid version string \""
<< external_version << "\".";
continue;
}
visitor->OnExternalExtensionFileFound(extension_id, version.get(), path,
Extension::EXTERNAL_PREF);
continue;
}
DCHECK(has_external_update_url); // Checking of keys above ensures this.
GURL update_url(external_update_url);
if (!update_url.is_valid()) {
LOG(WARNING) << "Malformed extension dictionary for extension: "
<< extension_id.c_str() << ". " << kExternalUpdateUrl
<< " must be a valid URL. Saw \"" << external_update_url
<< "\".";
continue;
}
visitor->OnExternalExtensionUpdateUrlFound(extension_id, update_url);
}
}
bool ExternalPrefExtensionProvider::HasExtension(const std::string& id) const {
return prefs_->HasKey(id);
}
bool ExternalPrefExtensionProvider::GetExtensionDetails(
const std::string& id, Extension::Location* location,
scoped_ptr<Version>* version) const {
DictionaryValue* extension = NULL;
if (!prefs_->GetDictionary(id, &extension))
return false;
Extension::Location loc = Extension::INVALID;
if (extension->HasKey(kExternalUpdateUrl)) {
loc = Extension::EXTERNAL_PREF_DOWNLOAD;
} else if (extension->HasKey(kExternalCrx)) {
loc = Extension::EXTERNAL_PREF;
std::string external_version;
if (!extension->GetString(kExternalVersion, &external_version))
return false;
if (version)
version->reset(Version::GetVersionFromString(external_version));
} else {
NOTREACHED(); // Chrome should not allow prefs to get into this state.
return false;
}
if (location)
*location = loc;
return true;
}
void ExternalPrefExtensionProvider::SetPreferences(
ValueSerializer* serializer) {
std::string error_msg;
Value* extensions = serializer->Deserialize(NULL, &error_msg);
scoped_ptr<DictionaryValue> dictionary(new DictionaryValue());
if (!extensions) {
LOG(WARNING) << "Unable to deserialize json data: " << error_msg;
} else {
if (!extensions->IsType(Value::TYPE_DICTIONARY)) {
NOTREACHED() << "Invalid json data";
} else {
dictionary.reset(static_cast<DictionaryValue*>(extensions));
}
}
prefs_.reset(dictionary.release());
}
|
