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// Copyright (c) 2006-2008 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 <shlobj.h>
#include "testing/gtest/include/gtest/gtest.h"
#include "sandbox/src/registry_policy.h"
#include "sandbox/src/sandbox.h"
#include "sandbox/src/sandbox_policy.h"
#include "sandbox/src/sandbox_factory.h"
#include "sandbox/src/nt_internals.h"
#include "sandbox/src/win_utils.h"
#include "sandbox/tests/common/controller.h"
namespace {
static const DWORD kAllowedRegFlags = KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS |
KEY_NOTIFY | KEY_READ | GENERIC_READ |
GENERIC_EXECUTE | READ_CONTROL;
#define BINDNTDLL(name) \
name ## Function name = reinterpret_cast<name ## Function>( \
::GetProcAddress(::GetModuleHandle(L"ntdll.dll"), #name))
bool IsKeyOpenForRead(HKEY handle) {
BINDNTDLL(NtQueryObject);
OBJECT_BASIC_INFORMATION info = {0};
NTSTATUS status = NtQueryObject(handle, ObjectBasicInformation, &info,
sizeof(info), NULL);
if (!NT_SUCCESS(status))
return false;
if ((info.GrantedAccess & (~kAllowedRegFlags)) != 0)
return false;
return true;
}
}
namespace sandbox {
SBOX_TESTS_COMMAND int Reg_OpenKey(int argc, wchar_t **argv) {
if (argc != 4)
return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;
REGSAM desired_access;
if (wcscmp(argv[1], L"read") == 0)
desired_access = KEY_READ;
else if (wcscmp(argv[1], L"write") == 0)
desired_access = KEY_ALL_ACCESS;
else
desired_access = MAXIMUM_ALLOWED;
HKEY root = GetReservedKeyFromName(argv[2]);
HKEY key;
LRESULT result = 0;
if (wcscmp(argv[0], L"create") == 0)
result = ::RegCreateKeyEx(root, argv[3], 0, NULL, 0, desired_access, NULL,
&key, NULL);
else
result = ::RegOpenKeyEx(root, argv[3], 0, desired_access, &key);
if (ERROR_SUCCESS == result) {
if (MAXIMUM_ALLOWED == desired_access) {
if (!IsKeyOpenForRead(key)) {
::RegCloseKey(key);
return SBOX_TEST_FAILED;
}
}
::RegCloseKey(key);
return SBOX_TEST_SUCCEEDED;
} else if (ERROR_ACCESS_DENIED == result) {
return SBOX_TEST_DENIED;
}
return SBOX_TEST_FAILED;
}
TEST(RegistryPolicyTest, TestKeyAnyAccess) {
TestRunner runner;
EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_REGISTRY,
TargetPolicy::REG_ALLOW_READONLY,
L"HKEY_LOCAL_MACHINE"));
EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_REGISTRY,
TargetPolicy::REG_ALLOW_ANY,
L"HKEY_LOCAL_MACHINE\\Software\\Microsoft"));
// Tests read access on key allowed for read-write.
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(
L"Reg_OpenKey create read HKEY_LOCAL_MACHINE software\\microsoft"));
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(
L"Reg_OpenKey open read HKEY_LOCAL_MACHINE software\\microsoft"));
// Tests write access on key allowed for read-write.
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(
L"Reg_OpenKey create write HKEY_LOCAL_MACHINE software\\microsoft"));
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(
L"Reg_OpenKey open write HKEY_LOCAL_MACHINE software\\microsoft"));
// Tests subdirectory access on keys where we don't have subdirectory acess.
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"Reg_OpenKey create read "
L"HKEY_LOCAL_MACHINE software\\microsoft\\Windows"));
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"Reg_OpenKey open read "
L"HKEY_LOCAL_MACHINE software\\microsoft\\windows"));
// Tests to see if we can create keys where we dont have subdirectory access.
// This is denied.
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"Reg_OpenKey create write "
L"HKEY_LOCAL_MACHINE software\\Microsoft\\google_unit_tests"));
RegDeleteKey(HKEY_LOCAL_MACHINE, L"software\\Microsoft\\google_unit_tests");
// Tests if we need to handle differently the "\\" at the end.
// This is denied. We need to add both rules.
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(
L"Reg_OpenKey create read HKEY_LOCAL_MACHINE software\\microsoft\\"));
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(
L"Reg_OpenKey open read HKEY_LOCAL_MACHINE software\\microsoft\\"));
}
TEST(RegistryPolicyTest, TestKeyNoAccess) {
TestRunner runner;
EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_REGISTRY,
TargetPolicy::REG_ALLOW_READONLY,
L"HKEY_LOCAL_MACHINE"));
// Tests read access where we don't have access at all.
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(
L"Reg_OpenKey create read HKEY_LOCAL_MACHINE software"));
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(
L"Reg_OpenKey open read HKEY_LOCAL_MACHINE software"));
}
TEST(RegistryPolicyTest, TestKeyReadOnlyAccess) {
TestRunner runner;
EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_REGISTRY,
TargetPolicy::REG_ALLOW_READONLY,
L"HKEY_LOCAL_MACHINE"));
EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_REGISTRY,
TargetPolicy::REG_ALLOW_READONLY,
L"HKEY_LOCAL_MACHINE\\Software\\Policies"));
EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_REGISTRY,
TargetPolicy::REG_ALLOW_READONLY,
L"HKEY_LOCAL_MACHINE\\Software\\Policies\\*"));
// Tests subdirectory acess on keys where we have subdirectory acess.
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"Reg_OpenKey create read "
L"HKEY_LOCAL_MACHINE software\\Policies\\microsoft"));
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"Reg_OpenKey open read "
L"HKEY_LOCAL_MACHINE software\\Policies\\microsoft"));
// Tests to see if we can create keys where we have subdirectory access.
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"Reg_OpenKey create write "
L"HKEY_LOCAL_MACHINE software\\Policies\\google_unit_tests"));
RegDeleteKey(HKEY_LOCAL_MACHINE, L"software\\Policies\\google_unit_tests");
}
TEST(RegistryPolicyTest, TestKeyAllAccessSubDir) {
TestRunner runner;
EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_REGISTRY,
TargetPolicy::REG_ALLOW_READONLY,
L"HKEY_LOCAL_MACHINE"));
EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_REGISTRY,
TargetPolicy::REG_ALLOW_ANY,
L"HKEY_LOCAL_MACHINE\\Software\\Policies"));
EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_REGISTRY,
TargetPolicy::REG_ALLOW_ANY,
L"HKEY_LOCAL_MACHINE\\Software\\Policies\\*"));
if (::IsUserAnAdmin()) {
// Tests to see if we can create keys where we have subdirectory access.
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"Reg_OpenKey create write "
L"HKEY_LOCAL_MACHINE software\\Policies\\google_unit_tests"));
RegDeleteKey(HKEY_LOCAL_MACHINE, L"software\\Policies\\google_unit_tests");
}
}
TEST(RegistryPolicyTest, TestKeyReadOnlyHKCU) {
TestRunner runner;
EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_REGISTRY,
TargetPolicy::REG_ALLOW_READONLY,
L"HKEY_CURRENT_USER"));
EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_REGISTRY,
TargetPolicy::REG_ALLOW_READONLY,
L"HKEY_CURRENT_USER\\Software"));
EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_REGISTRY,
TargetPolicy::REG_ALLOW_READONLY,
L"HKEY_USERS\\.default"));
EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_REGISTRY,
TargetPolicy::REG_ALLOW_READONLY,
L"HKEY_USERS\\.default\\software"));
// Tests read access where we only have read-only access.
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(
L"Reg_OpenKey create read HKEY_CURRENT_USER software"));
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(
L"Reg_OpenKey open read HKEY_CURRENT_USER software"));
// Tests write access where we only have read-only acess.
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(
L"Reg_OpenKey create write HKEY_CURRENT_USER software"));
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(
L"Reg_OpenKey open write HKEY_CURRENT_USER software"));
// Tests maximum allowed access where we only have read-only access.
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(
L"Reg_OpenKey create maximum_allowed HKEY_CURRENT_USER software"));
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(
L"Reg_OpenKey open maximum_allowed HKEY_CURRENT_USER software"));
}
} // namespace sandbox
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