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
|
// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "chrome/app/google_update_client.h"
#include <shlobj.h>
#include <strsafe.h>
#include "chrome/app/client_util.h"
namespace {
const wchar_t kRegistryClients[] = L"Software\\Google\\Update\\Clients\\";
const wchar_t kRegistryClientState[] =
L"Software\\Google\\Update\\ClientState\\";
const wchar_t kRequestParamDidRun[] = L"dr";
const wchar_t kRegistryUpdate[] = L"Software\\Google\\Update\\";
const wchar_t kRegistryValueCrashReportPath[] = L"CrashReportPath";
const wchar_t kEnvProductVersionKey[] = L"CHROME_VERSION";
// Allocates the out param on success.
bool GoogleUpdateEnvQueryStr(const wchar_t* key_name, wchar_t** out) {
DWORD count = ::GetEnvironmentVariableW(key_name, NULL, 0);
if (!count) {
return false;
}
wchar_t* value = new wchar_t[count + 1];
if (!::GetEnvironmentVariableW(key_name, value, count)) {
delete[] value;
return false;
}
*out = value;
return true;
}
} // anonymous namespace
namespace google_update {
GoogleUpdateClient::GoogleUpdateClient() : version_(NULL) {
}
GoogleUpdateClient::~GoogleUpdateClient() {
delete[] version_;
}
std::wstring GoogleUpdateClient::GetDLLPath() {
if (client_util::FileExists(dll_path_))
return std::wstring(dll_path_) + L"\\" + dll_;
// This is not an official build. Find the dll using the default
// path order in LoadLibrary.
wchar_t path[MAX_PATH] = {0};
wchar_t* file_part = NULL;
DWORD result = ::SearchPath(NULL, dll_.c_str(), NULL, MAX_PATH,
path, &file_part);
if (result == 0 || result > MAX_PATH)
return std::wstring();
return path;
}
const wchar_t* GoogleUpdateClient::GetVersion() const {
return version_;
}
bool GoogleUpdateClient::Launch(HINSTANCE instance,
sandbox::SandboxInterfaceInfo* sandbox,
wchar_t* command_line,
int show_command,
const char* entry_name,
int* ret) {
if (client_util::FileExists(dll_path_)) {
::SetCurrentDirectory(dll_path_);
// Setting the version on the environment block is a 'best effort' deal.
// It enables Google Update running on a child to load the same DLL version.
::SetEnvironmentVariableW(kEnvProductVersionKey, version_);
}
// The dll can be in the exe's directory or in the current directory.
// Use the alternate search path to be sure that it's not trying to load it
// calling application's directory.
HINSTANCE dll_handle = ::LoadLibraryEx(dll_.c_str(), NULL,
LOAD_WITH_ALTERED_SEARCH_PATH);
if (NULL == dll_handle) {
unsigned long err = GetLastError();
if (err) {
WCHAR message[500] = {0};
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err, 0,
reinterpret_cast<LPWSTR>(&message), 500, NULL);
::OutputDebugStringW(message);
}
return false;
}
bool did_launch = false;
client_util::DLL_MAIN entry = reinterpret_cast<client_util::DLL_MAIN>(
::GetProcAddress(dll_handle, entry_name));
if (NULL != entry) {
// record did_run "dr" in client state
HKEY reg_root = (user_mode_) ? HKEY_CURRENT_USER : HKEY_LOCAL_MACHINE;
std::wstring key_path = kRegistryClientState + guid_;
HKEY reg_key;
if (::RegOpenKeyEx(reg_root, key_path.c_str(), 0,
KEY_WRITE, ®_key) == ERROR_SUCCESS) {
const wchar_t kVal[] = L"1";
::RegSetValueEx(reg_key, kRequestParamDidRun, 0, REG_SZ,
reinterpret_cast<const BYTE *>(kVal), sizeof(kVal));
::RegCloseKey(reg_key);
}
int rc = (entry)(instance, sandbox, command_line, show_command);
if (ret) {
*ret = rc;
}
did_launch = true;
}
#ifdef PURIFY
// We should never unload the dll. There is only risk and no gain from
// doing so. The singleton dtors have been already run by AtExitManager.
::FreeLibrary(dll_handle);
#endif
return did_launch;
}
bool GoogleUpdateClient::Init(const wchar_t* client_guid,
const wchar_t* client_dll) {
client_util::GetExecutablePath(dll_path_);
user_mode_ = client_util::IsUserModeInstall(dll_path_);
guid_.assign(client_guid);
dll_.assign(client_dll);
bool ret = false;
if (!guid_.empty()) {
if (GoogleUpdateEnvQueryStr(kEnvProductVersionKey, &version_)) {
ret = true;
} else {
std::wstring key(kRegistryClients);
key.append(guid_);
if (client_util::GetChromiumVersion(dll_path_, key.c_str(), &version_))
ret = true;
}
}
if (version_) {
::StringCchCat(dll_path_, MAX_PATH, version_);
}
return ret;
}
} // namespace google_update
|
