1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// This file contains the validation tests for the sandbox.
6// It includes the tests that need to be performed inside the
7// sandbox.
8
9#include <shlwapi.h>
10
11#include "base/win/windows_version.h"
12#include "testing/gtest/include/gtest/gtest.h"
13#include "sandbox/win/tests/common/controller.h"
14
15#pragma comment(lib, "shlwapi.lib")
16
17namespace {
18
19void TestProcessAccess(sandbox::TestRunner* runner, DWORD target) {
20  const wchar_t *kCommandTemplate = L"OpenProcessCmd %d %d";
21  wchar_t command[1024] = {0};
22
23  // Test all the scary process permissions.
24  wsprintf(command, kCommandTemplate, target, PROCESS_CREATE_THREAD);
25  EXPECT_EQ(sandbox::SBOX_TEST_DENIED, runner->RunTest(command));
26  wsprintf(command, kCommandTemplate, target, PROCESS_DUP_HANDLE);
27  EXPECT_EQ(sandbox::SBOX_TEST_DENIED, runner->RunTest(command));
28  wsprintf(command, kCommandTemplate, target, PROCESS_SET_INFORMATION);
29  EXPECT_EQ(sandbox::SBOX_TEST_DENIED, runner->RunTest(command));
30  wsprintf(command, kCommandTemplate, target, PROCESS_VM_OPERATION);
31  EXPECT_EQ(sandbox::SBOX_TEST_DENIED, runner->RunTest(command));
32  wsprintf(command, kCommandTemplate, target, PROCESS_VM_READ);
33  EXPECT_EQ(sandbox::SBOX_TEST_DENIED, runner->RunTest(command));
34  wsprintf(command, kCommandTemplate, target, PROCESS_VM_WRITE);
35  EXPECT_EQ(sandbox::SBOX_TEST_DENIED, runner->RunTest(command));
36  wsprintf(command, kCommandTemplate, target, PROCESS_QUERY_INFORMATION);
37  EXPECT_EQ(sandbox::SBOX_TEST_DENIED, runner->RunTest(command));
38  wsprintf(command, kCommandTemplate, target, WRITE_DAC);
39  EXPECT_EQ(sandbox::SBOX_TEST_DENIED, runner->RunTest(command));
40  wsprintf(command, kCommandTemplate, target, WRITE_OWNER);
41  EXPECT_EQ(sandbox::SBOX_TEST_DENIED, runner->RunTest(command));
42  wsprintf(command, kCommandTemplate, target, READ_CONTROL);
43  EXPECT_EQ(sandbox::SBOX_TEST_DENIED, runner->RunTest(command));
44}
45
46}  // namespace
47
48namespace sandbox {
49
50// Returns true if the volume that contains any_path supports ACL security. The
51// input path can contain unexpanded environment strings. Returns false on any
52// failure or if the file system does not support file security (such as FAT).
53bool VolumeSupportsACLs(const wchar_t* any_path) {
54  wchar_t expand[MAX_PATH +1];
55  DWORD len =::ExpandEnvironmentStringsW(any_path, expand, _countof(expand));
56  if (0 == len) return false;
57  if (len >  _countof(expand)) return false;
58  if (!::PathStripToRootW(expand)) return false;
59  DWORD fs_flags = 0;
60  if (!::GetVolumeInformationW(expand, NULL, 0, 0, NULL, &fs_flags, NULL, 0))
61    return false;
62  if (fs_flags & FILE_PERSISTENT_ACLS) return true;
63  return false;
64}
65
66// Tests if the suite is working properly.
67TEST(ValidationSuite, TestSuite) {
68  TestRunner runner;
69  ASSERT_EQ(SBOX_TEST_PING_OK, runner.RunTest(L"ping"));
70}
71
72// Tests if the file system is correctly protected by the sandbox.
73TEST(ValidationSuite, TestFileSystem) {
74  // Do not perform the test if the system is using FAT or any other
75  // file system that does not have file security.
76  ASSERT_TRUE(VolumeSupportsACLs(L"%SystemDrive%\\"));
77  ASSERT_TRUE(VolumeSupportsACLs(L"%SystemRoot%\\"));
78  ASSERT_TRUE(VolumeSupportsACLs(L"%ProgramFiles%\\"));
79  ASSERT_TRUE(VolumeSupportsACLs(L"%Temp%\\"));
80  ASSERT_TRUE(VolumeSupportsACLs(L"%AppData%\\"));
81
82  TestRunner runner;
83  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"OpenFile %SystemDrive%"));
84  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"OpenFile %SystemRoot%"));
85  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"OpenFile %ProgramFiles%"));
86  EXPECT_EQ(SBOX_TEST_DENIED,
87      runner.RunTest(L"OpenFile %SystemRoot%\\System32"));
88  EXPECT_EQ(SBOX_TEST_DENIED,
89      runner.RunTest(L"OpenFile %SystemRoot%\\explorer.exe"));
90  EXPECT_EQ(SBOX_TEST_DENIED,
91      runner.RunTest(L"OpenFile %SystemRoot%\\Cursors\\arrow_i.cur"));
92  EXPECT_EQ(SBOX_TEST_DENIED,
93      runner.RunTest(L"OpenFile %AllUsersProfile%"));
94  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"OpenFile %Temp%"));
95  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"OpenFile %AppData%"));
96}
97
98// Tests if the registry is correctly protected by the sandbox.
99TEST(ValidationSuite, TestRegistry) {
100  TestRunner runner;
101  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"OpenKey HKLM"));
102  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"OpenKey HKCU"));
103  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"OpenKey HKU"));
104  EXPECT_EQ(SBOX_TEST_DENIED,
105      runner.RunTest(
106          L"OpenKey HKLM "
107          L"\"Software\\Microsoft\\Windows NT\\CurrentVersion\\WinLogon\""));
108}
109
110// Tests that the permissions on the Windowstation does not allow the sandbox
111// to get to the interactive desktop or to make the sbox desktop interactive.
112TEST(ValidationSuite, TestDesktop) {
113  TestRunner runner;
114  runner.GetPolicy()->SetAlternateDesktop(false);
115  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"OpenInteractiveDesktop NULL"));
116  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"SwitchToSboxDesktop NULL"));
117}
118
119// Tests if the windows are correctly protected by the sandbox.
120TEST(ValidationSuite, TestWindows) {
121  TestRunner runner;
122  wchar_t command[1024] = {0};
123
124  wsprintf(command, L"ValidWindow %d", ::GetDesktopWindow());
125  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(command));
126
127  wsprintf(command, L"ValidWindow %d", ::FindWindow(NULL, NULL));
128  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(command));
129}
130
131// Tests that a locked-down process cannot open another locked-down process.
132TEST(ValidationSuite, TestProcessDenyLockdown) {
133  TestRunner runner;
134  TestRunner target;
135  wchar_t command[1024] = {0};
136
137  target.SetAsynchronous(true);
138
139  EXPECT_EQ(SBOX_TEST_SUCCEEDED, target.RunTest(L"SleepCmd 30000"));
140
141  TestProcessAccess(&runner, target.process_id());
142}
143
144// Tests that a low-integrity process cannot open a locked-down process (due
145// to the integrity label changing after startup via SetDelayedIntegrityLevel).
146TEST(ValidationSuite, TestProcessDenyLowIntegrity) {
147  // This test applies only to Vista and above.
148  if (base::win::Version() < base::win::VERSION_VISTA)
149    return;
150
151  TestRunner runner;
152  TestRunner target;
153  wchar_t command[1024] = {0};
154
155  target.SetAsynchronous(true);
156  target.GetPolicy()->SetDelayedIntegrityLevel(INTEGRITY_LEVEL_LOW);
157
158  runner.GetPolicy()->SetIntegrityLevel(INTEGRITY_LEVEL_LOW);
159  runner.GetPolicy()->SetTokenLevel(USER_RESTRICTED_SAME_ACCESS,
160                                    USER_INTERACTIVE);
161
162  EXPECT_EQ(SBOX_TEST_SUCCEEDED, target.RunTest(L"SleepCmd 30000"));
163
164  TestProcessAccess(&runner, target.process_id());
165}
166
167// Tests that a locked-down process cannot open a low-integrity process.
168TEST(ValidationSuite, TestProcessDenyBelowLowIntegrity) {
169  //  This test applies only to Vista and above.
170  if (base::win::Version() < base::win::VERSION_VISTA)
171    return;
172
173  TestRunner runner;
174  TestRunner target;
175  wchar_t command[1024] = {0};
176
177  target.SetAsynchronous(true);
178  target.GetPolicy()->SetIntegrityLevel(INTEGRITY_LEVEL_LOW);
179  target.GetPolicy()->SetTokenLevel(USER_RESTRICTED_SAME_ACCESS,
180                                    USER_INTERACTIVE);
181
182  runner.GetPolicy()->SetDelayedIntegrityLevel(INTEGRITY_LEVEL_UNTRUSTED);
183  runner.GetPolicy()->SetTokenLevel(USER_RESTRICTED_SAME_ACCESS,
184                                    USER_INTERACTIVE);
185
186  EXPECT_EQ(SBOX_TEST_SUCCEEDED, target.RunTest(L"SleepCmd 30000"));
187
188  TestProcessAccess(&runner, target.process_id());
189}
190
191// Tests if the threads are correctly protected by the sandbox.
192TEST(ValidationSuite, TestThread) {
193  TestRunner runner;
194  wchar_t command[1024] = {0};
195
196  wsprintf(command, L"OpenThreadCmd %d", ::GetCurrentThreadId());
197  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(command));
198}
199
200}  // namespace sandbox
201