blob: df1e903cb496ce210f7f6a69f9fa91a2ae1b870e [file] [log] [blame]
// Copyright (c) 2011 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 <algorithm>
#include <cctype>
#include <windows.h>
#include <winioctl.h>
#include "base/win/scoped_handle.h"
#include "sandbox/src/nt_internals.h"
#include "sandbox/src/sandbox.h"
#include "sandbox/src/sandbox_factory.h"
#include "sandbox/src/sandbox_policy.h"
#include "sandbox/src/win_utils.h"
#include "sandbox/tests/common/controller.h"
#include "sandbox/tests/common/test_utils.h"
#include "testing/gtest/include/gtest/gtest.h"
#define BINDNTDLL(name) \
name ## Function name = reinterpret_cast<name ## Function>( \
::GetProcAddress(::GetModuleHandle(L"ntdll.dll"), #name))
namespace sandbox {
const ULONG kSharing = FILE_SHARE_WRITE | FILE_SHARE_READ | FILE_SHARE_DELETE;
// Creates a file using different desired access. Returns if the call succeeded
// or not. The first argument in argv is the filename. If the second argument
// is "read", we try read only access. Otherwise we try read-write access.
SBOX_TESTS_COMMAND int File_Create(int argc, wchar_t **argv) {
if (argc != 2)
return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;
bool read = (_wcsicmp(argv[0], L"Read") == 0);
if (read) {
base::win::ScopedHandle file1(CreateFile(
argv[1], GENERIC_READ, kSharing, NULL, OPEN_EXISTING, 0, NULL));
base::win::ScopedHandle file2(CreateFile(
argv[1], FILE_EXECUTE, kSharing, NULL, OPEN_EXISTING, 0, NULL));
if (file1.Get() && file2.Get())
return SBOX_TEST_SUCCEEDED;
return SBOX_TEST_DENIED;
} else {
base::win::ScopedHandle file1(CreateFile(
argv[1], GENERIC_ALL, kSharing, NULL, OPEN_EXISTING, 0, NULL));
base::win::ScopedHandle file2(CreateFile(
argv[1], GENERIC_READ | FILE_WRITE_DATA, kSharing, NULL, OPEN_EXISTING,
0, NULL));
if (file1.Get() && file2.Get())
return SBOX_TEST_SUCCEEDED;
return SBOX_TEST_DENIED;
}
}
SBOX_TESTS_COMMAND int File_Win32Create(int argc, wchar_t **argv) {
if (argc != 1) {
SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;
}
std::wstring full_path = MakePathToSys(argv[0], false);
if (full_path.empty()) {
return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;
}
HANDLE file = ::CreateFileW(full_path.c_str(), GENERIC_READ, kSharing,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (INVALID_HANDLE_VALUE != file) {
::CloseHandle(file);
return SBOX_TEST_SUCCEEDED;
} else {
if (ERROR_ACCESS_DENIED == ::GetLastError()) {
return SBOX_TEST_DENIED;
} else {
return SBOX_TEST_FAILED;
}
}
return SBOX_TEST_SUCCEEDED;
}
// Creates the file in parameter using the NtCreateFile api and returns if the
// call succeeded or not.
SBOX_TESTS_COMMAND int File_CreateSys32(int argc, wchar_t **argv) {
BINDNTDLL(NtCreateFile);
BINDNTDLL(RtlInitUnicodeString);
if (!NtCreateFile || !RtlInitUnicodeString)
return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;
if (argc != 1)
return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;
std::wstring file(argv[0]);
if (0 != _wcsnicmp(file.c_str(), kNTObjManPrefix, kNTObjManPrefixLen))
file = MakePathToSys(argv[0], true);
UNICODE_STRING object_name;
RtlInitUnicodeString(&object_name, file.c_str());
OBJECT_ATTRIBUTES obj_attributes = {0};
InitializeObjectAttributes(&obj_attributes, &object_name,
OBJ_CASE_INSENSITIVE, NULL, NULL);
HANDLE handle;
IO_STATUS_BLOCK io_block = {0};
NTSTATUS status = NtCreateFile(&handle, FILE_READ_DATA, &obj_attributes,
&io_block, NULL, 0, kSharing, FILE_OPEN,
0, NULL, 0);
if (NT_SUCCESS(status)) {
::CloseHandle(handle);
return SBOX_TEST_SUCCEEDED;
} else if (STATUS_ACCESS_DENIED == status) {
return SBOX_TEST_DENIED;
} else if (STATUS_OBJECT_NAME_NOT_FOUND == status) {
return SBOX_TEST_NOT_FOUND;
}
return SBOX_TEST_FAILED;
}
// Opens the file in parameter using the NtOpenFile api and returns if the
// call succeeded or not.
SBOX_TESTS_COMMAND int File_OpenSys32(int argc, wchar_t **argv) {
BINDNTDLL(NtOpenFile);
BINDNTDLL(RtlInitUnicodeString);
if (!NtOpenFile || !RtlInitUnicodeString)
return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;
if (argc != 1)
return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;
std::wstring file = MakePathToSys(argv[0], true);
UNICODE_STRING object_name;
RtlInitUnicodeString(&object_name, file.c_str());
OBJECT_ATTRIBUTES obj_attributes = {0};
InitializeObjectAttributes(&obj_attributes, &object_name,
OBJ_CASE_INSENSITIVE, NULL, NULL);
HANDLE handle;
IO_STATUS_BLOCK io_block = {0};
NTSTATUS status = NtOpenFile(&handle, FILE_READ_DATA, &obj_attributes,
&io_block, kSharing, 0);
if (NT_SUCCESS(status)) {
::CloseHandle(handle);
return SBOX_TEST_SUCCEEDED;
} else if (STATUS_ACCESS_DENIED == status) {
return SBOX_TEST_DENIED;
} else if (STATUS_OBJECT_NAME_NOT_FOUND == status) {
return SBOX_TEST_NOT_FOUND;
}
return SBOX_TEST_FAILED;
}
SBOX_TESTS_COMMAND int File_GetDiskSpace(int argc, wchar_t **argv) {
std::wstring sys_path = MakePathToSys(L"", false);
if (sys_path.empty()) {
return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;
}
ULARGE_INTEGER free_user = {0};
ULARGE_INTEGER total = {0};
ULARGE_INTEGER free_total = {0};
if (::GetDiskFreeSpaceExW(sys_path.c_str(), &free_user, &total,
&free_total)) {
if ((total.QuadPart != 0) && (free_total.QuadPart !=0)) {
return SBOX_TEST_SUCCEEDED;
}
} else {
if (ERROR_ACCESS_DENIED == ::GetLastError()) {
return SBOX_TEST_DENIED;
} else {
return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;
}
}
return SBOX_TEST_SUCCEEDED;
}
// Move a file using the MoveFileEx api and returns if the call succeeded or
// not.
SBOX_TESTS_COMMAND int File_Rename(int argc, wchar_t **argv) {
if (argc != 2)
return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;
if (::MoveFileEx(argv[0], argv[1], 0))
return SBOX_TEST_SUCCEEDED;
if (::GetLastError() != ERROR_ACCESS_DENIED)
return SBOX_TEST_FAILED;
return SBOX_TEST_DENIED;
}
// Query the attributes of file in parameter using the NtQueryAttributesFile api
// and NtQueryFullAttributesFile and returns if the call succeeded or not. The
// second argument in argv is "d" or "f" telling if we expect the attributes to
// specify a file or a directory. The expected attribute has to match the real
// attributes for the call to be successful.
SBOX_TESTS_COMMAND int File_QueryAttributes(int argc, wchar_t **argv) {
BINDNTDLL(NtQueryAttributesFile);
BINDNTDLL(NtQueryFullAttributesFile);
BINDNTDLL(RtlInitUnicodeString);
if (!NtQueryAttributesFile || !NtQueryFullAttributesFile ||
!RtlInitUnicodeString)
return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;
if (argc != 2)
return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;
bool expect_directory = (L'd' == argv[1][0]);
UNICODE_STRING object_name;
std::wstring file = MakePathToSys(argv[0], true);
RtlInitUnicodeString(&object_name, file.c_str());
OBJECT_ATTRIBUTES obj_attributes = {0};
InitializeObjectAttributes(&obj_attributes, &object_name,
OBJ_CASE_INSENSITIVE, NULL, NULL);
FILE_BASIC_INFORMATION info = {0};
FILE_NETWORK_OPEN_INFORMATION full_info = {0};
NTSTATUS status1 = NtQueryAttributesFile(&obj_attributes, &info);
NTSTATUS status2 = NtQueryFullAttributesFile(&obj_attributes, &full_info);
if (status1 != status2)
return SBOX_TEST_FAILED;
if (NT_SUCCESS(status1)) {
if (info.FileAttributes != full_info.FileAttributes)
return SBOX_TEST_FAILED;
bool is_directory1 = (info.FileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0;
if (expect_directory == is_directory1)
return SBOX_TEST_SUCCEEDED;
} else if (STATUS_ACCESS_DENIED == status1) {
return SBOX_TEST_DENIED;
} else if (STATUS_OBJECT_NAME_NOT_FOUND == status1) {
return SBOX_TEST_NOT_FOUND;
}
return SBOX_TEST_FAILED;
}
TEST(FilePolicyTest, DenyNtCreateCalc) {
TestRunner runner;
EXPECT_TRUE(runner.AddRuleSys32(TargetPolicy::FILES_ALLOW_DIR_ANY,
L"calc.exe"));
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"File_CreateSys32 calc.exe"));
runner.SetTestState(BEFORE_REVERT);
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"File_CreateSys32 calc.exe"));
}
TEST(FilePolicyTest, AllowNtCreateCalc) {
TestRunner runner;
EXPECT_TRUE(runner.AddRuleSys32(TargetPolicy::FILES_ALLOW_ANY, L"calc.exe"));
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"File_CreateSys32 calc.exe"));
runner.SetTestState(BEFORE_REVERT);
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"File_CreateSys32 calc.exe"));
}
TEST(FilePolicyTest, AllowNtCreateWithNativePath) {
std::wstring calc = MakePathToSys(L"calc.exe", false);
std::wstring nt_path;
ASSERT_TRUE(GetNtPathFromWin32Path(calc, &nt_path));
TestRunner runner;
runner.AddFsRule(TargetPolicy::FILES_ALLOW_READONLY, nt_path.c_str());
wchar_t buff[MAX_PATH];
::wsprintfW(buff, L"File_CreateSys32 %s", nt_path.c_str());
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(buff));
std::transform(nt_path.begin(), nt_path.end(), nt_path.begin(), std::tolower);
::wsprintfW(buff, L"File_CreateSys32 %s", nt_path.c_str());
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(buff));
}
TEST(FilePolicyTest, AllowReadOnly) {
TestRunner runner;
// Create a temp file because we need write access to it.
wchar_t temp_directory[MAX_PATH];
wchar_t temp_file_name[MAX_PATH];
ASSERT_NE(::GetTempPath(MAX_PATH, temp_directory), 0u);
ASSERT_NE(::GetTempFileName(temp_directory, L"test", 0, temp_file_name), 0u);
EXPECT_TRUE(runner.AddFsRule(TargetPolicy::FILES_ALLOW_READONLY,
temp_file_name));
wchar_t command_read[MAX_PATH + 20] = {0};
wsprintf(command_read, L"File_Create Read \"%ls\"", temp_file_name);
wchar_t command_write[MAX_PATH + 20] = {0};
wsprintf(command_write, L"File_Create Write \"%ls\"", temp_file_name);
// Verify that we have read access after revert.
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(command_read));
// Verify that we don't have write access after revert.
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(command_write));
// Verify that we really have write access to the file.
runner.SetTestState(BEFORE_REVERT);
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(command_write));
DeleteFile(temp_file_name);
}
TEST(FilePolicyTest, AllowWildcard) {
TestRunner runner;
// Create a temp file because we need write access to it.
wchar_t temp_directory[MAX_PATH];
wchar_t temp_file_name[MAX_PATH];
ASSERT_NE(::GetTempPath(MAX_PATH, temp_directory), 0u);
ASSERT_NE(::GetTempFileName(temp_directory, L"test", 0, temp_file_name), 0u);
wcscat_s(temp_directory, MAX_PATH, L"*");
EXPECT_TRUE(runner.AddFsRule(TargetPolicy::FILES_ALLOW_ANY, temp_directory));
wchar_t command_write[MAX_PATH + 20] = {0};
wsprintf(command_write, L"File_Create Write \"%ls\"", temp_file_name);
// Verify that we have write access after revert.
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(command_write));
DeleteFile(temp_file_name);
}
TEST(FilePolicyTest, AllowNtCreatePatternRule) {
TestRunner runner;
EXPECT_TRUE(runner.AddRuleSys32(TargetPolicy::FILES_ALLOW_ANY, L"App*.dll"));
EXPECT_EQ(SBOX_TEST_SUCCEEDED,
runner.RunTest(L"File_OpenSys32 appmgmts.dll"));
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"File_OpenSys32 appwiz.cpl"));
runner.SetTestState(BEFORE_REVERT);
EXPECT_EQ(SBOX_TEST_SUCCEEDED,
runner.RunTest(L"File_OpenSys32 appmgmts.dll"));
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"File_OpenSys32 appwiz.cpl"));
}
TEST(FilePolicyTest, CheckNotFound) {
TestRunner runner;
EXPECT_TRUE(runner.AddRuleSys32(TargetPolicy::FILES_ALLOW_ANY, L"n*.dll"));
EXPECT_EQ(SBOX_TEST_NOT_FOUND,
runner.RunTest(L"File_OpenSys32 notfound.dll"));
}
TEST(FilePolicyTest, CheckNoLeak) {
TestRunner runner;
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"File_CreateSys32 notfound.exe"));
}
TEST(FilePolicyTest, TestQueryAttributesFile) {
TestRunner runner;
EXPECT_TRUE(runner.AddRuleSys32(TargetPolicy::FILES_ALLOW_ANY,
L"appmgmts.dll"));
EXPECT_TRUE(runner.AddRuleSys32(TargetPolicy::FILES_ALLOW_ANY,
L"notfound.exe"));
EXPECT_TRUE(runner.AddRuleSys32(TargetPolicy::FILES_ALLOW_ANY, L"drivers"));
EXPECT_TRUE(runner.AddRuleSys32(TargetPolicy::FILES_ALLOW_QUERY,
L"ipconfig.exe"));
EXPECT_EQ(SBOX_TEST_SUCCEEDED,
runner.RunTest(L"File_QueryAttributes drivers d"));
EXPECT_EQ(SBOX_TEST_SUCCEEDED,
runner.RunTest(L"File_QueryAttributes appmgmts.dll f"));
EXPECT_EQ(SBOX_TEST_SUCCEEDED,
runner.RunTest(L"File_QueryAttributes ipconfig.exe f"));
EXPECT_EQ(SBOX_TEST_DENIED,
runner.RunTest(L"File_QueryAttributes ftp.exe f"));
EXPECT_EQ(SBOX_TEST_NOT_FOUND,
runner.RunTest(L"File_QueryAttributes notfound.exe f"));
}
// Makes sure that we don't leak information when there is not policy to allow
// a path.
TEST(FilePolicyTest, TestQueryAttributesFileNoPolicy) {
TestRunner runner;
EXPECT_EQ(SBOX_TEST_DENIED,
runner.RunTest(L"File_QueryAttributes ftp.exe f"));
EXPECT_EQ(SBOX_TEST_DENIED,
runner.RunTest(L"File_QueryAttributes notfound.exe f"));
}
TEST(FilePolicyTest, TestRename) {
TestRunner runner;
// Give access to the temp directory.
wchar_t temp_directory[MAX_PATH];
wchar_t temp_file_name1[MAX_PATH];
wchar_t temp_file_name2[MAX_PATH];
wchar_t temp_file_name3[MAX_PATH];
wchar_t temp_file_name4[MAX_PATH];
wchar_t temp_file_name5[MAX_PATH];
wchar_t temp_file_name6[MAX_PATH];
wchar_t temp_file_name7[MAX_PATH];
wchar_t temp_file_name8[MAX_PATH];
ASSERT_NE(::GetTempPath(MAX_PATH, temp_directory), 0u);
ASSERT_NE(::GetTempFileName(temp_directory, L"test", 0, temp_file_name1), 0u);
ASSERT_NE(::GetTempFileName(temp_directory, L"test", 0, temp_file_name2), 0u);
ASSERT_NE(::GetTempFileName(temp_directory, L"test", 0, temp_file_name3), 0u);
ASSERT_NE(::GetTempFileName(temp_directory, L"test", 0, temp_file_name4), 0u);
ASSERT_NE(::GetTempFileName(temp_directory, L"test", 0, temp_file_name5), 0u);
ASSERT_NE(::GetTempFileName(temp_directory, L"test", 0, temp_file_name6), 0u);
ASSERT_NE(::GetTempFileName(temp_directory, L"test", 0, temp_file_name7), 0u);
ASSERT_NE(::GetTempFileName(temp_directory, L"test", 0, temp_file_name8), 0u);
// Add rules to make file1->file2 succeed.
ASSERT_TRUE(runner.AddFsRule(TargetPolicy::FILES_ALLOW_ANY, temp_file_name1));
ASSERT_TRUE(runner.AddFsRule(TargetPolicy::FILES_ALLOW_ANY, temp_file_name2));
// Add rules to make file3->file4 fail.
ASSERT_TRUE(runner.AddFsRule(TargetPolicy::FILES_ALLOW_ANY, temp_file_name3));
ASSERT_TRUE(runner.AddFsRule(TargetPolicy::FILES_ALLOW_READONLY,
temp_file_name4));
// Add rules to make file5->file6 fail.
ASSERT_TRUE(runner.AddFsRule(TargetPolicy::FILES_ALLOW_READONLY,
temp_file_name5));
ASSERT_TRUE(runner.AddFsRule(TargetPolicy::FILES_ALLOW_ANY, temp_file_name6));
// Add rules to make file7->no_pol_file fail.
ASSERT_TRUE(runner.AddFsRule(TargetPolicy::FILES_ALLOW_ANY, temp_file_name7));
// Delete the files where the files are going to be renamed to.
::DeleteFile(temp_file_name2);
::DeleteFile(temp_file_name4);
::DeleteFile(temp_file_name6);
::DeleteFile(temp_file_name8);
wchar_t command[MAX_PATH*2 + 20] = {0};
wsprintf(command, L"File_Rename \"%ls\" \"%ls\"", temp_file_name1,
temp_file_name2);
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(command));
wsprintf(command, L"File_Rename \"%ls\" \"%ls\"", temp_file_name3,
temp_file_name4);
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(command));
wsprintf(command, L"File_Rename \"%ls\" \"%ls\"", temp_file_name5,
temp_file_name6);
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(command));
wsprintf(command, L"File_Rename \"%ls\" \"%ls\"", temp_file_name7,
temp_file_name8);
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(command));
// Delete all the files in case they are still there.
::DeleteFile(temp_file_name1);
::DeleteFile(temp_file_name2);
::DeleteFile(temp_file_name3);
::DeleteFile(temp_file_name4);
::DeleteFile(temp_file_name5);
::DeleteFile(temp_file_name6);
::DeleteFile(temp_file_name7);
::DeleteFile(temp_file_name8);
}
TEST(FilePolicyTest, OpenSys32FilesDenyBecauseOfDir) {
TestRunner runner;
EXPECT_TRUE(runner.AddRuleSys32(TargetPolicy::FILES_ALLOW_DIR_ANY,
L"notepad.exe"));
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"File_Win32Create notepad.exe"));
runner.SetTestState(BEFORE_REVERT);
EXPECT_EQ(SBOX_TEST_SUCCEEDED,
runner.RunTest(L"File_Win32Create notepad.exe"));
}
TEST(FilePolicyTest, OpenSys32FilesAllowNotepad) {
TestRunner runner;
EXPECT_TRUE(runner.AddRuleSys32(TargetPolicy::FILES_ALLOW_ANY,
L"notepad.exe"));
EXPECT_EQ(SBOX_TEST_SUCCEEDED,
runner.RunTest(L"File_Win32Create notepad.exe"));
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"File_Win32Create calc.exe"));
runner.SetTestState(BEFORE_REVERT);
EXPECT_EQ(SBOX_TEST_SUCCEEDED,
runner.RunTest(L"File_Win32Create notepad.exe"));
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"File_Win32Create calc.exe"));
}
TEST(FilePolicyTest, FileGetDiskSpace) {
TestRunner runner;
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"File_GetDiskSpace"));
runner.SetTestState(BEFORE_REVERT);
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"File_GetDiskSpace"));
// Add an 'allow' rule in the windows\system32 such that GetDiskFreeSpaceEx
// succeeds (it does an NtOpenFile) but windows\system32\notepad.exe is
// denied since there is no wild card in the rule.
EXPECT_TRUE(runner.AddRuleSys32(TargetPolicy::FILES_ALLOW_DIR_ANY, L""));
runner.SetTestState(BEFORE_REVERT);
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"File_GetDiskSpace"));
runner.SetTestState(AFTER_REVERT);
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"File_GetDiskSpace"));
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(L"File_Win32Create notepad.exe"));
}
TEST(FilePolicyTest, TestReparsePoint) {
TestRunner runner;
// Create a temp file because we need write access to it.
wchar_t temp_directory[MAX_PATH];
wchar_t temp_file_name[MAX_PATH];
ASSERT_NE(::GetTempPath(MAX_PATH, temp_directory), 0u);
ASSERT_NE(::GetTempFileName(temp_directory, L"test", 0, temp_file_name), 0u);
// Delete the file and create a directory instead.
ASSERT_TRUE(::DeleteFile(temp_file_name));
ASSERT_TRUE(::CreateDirectory(temp_file_name, NULL));
// Create a temporary file in the subfolder.
std::wstring subfolder = temp_file_name;
std::wstring temp_file_title = subfolder.substr(subfolder.rfind(L"\\") + 1);
std::wstring temp_file = subfolder + L"\\file_" + temp_file_title;
HANDLE file = ::CreateFile(temp_file.c_str(), FILE_ALL_ACCESS,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
CREATE_ALWAYS, 0, NULL);
ASSERT_TRUE(INVALID_HANDLE_VALUE != file);
ASSERT_TRUE(::CloseHandle(file));
// Create a temporary file in the temp directory.
std::wstring temp_dir = temp_directory;
std::wstring temp_file_in_temp = temp_dir + L"file_" + temp_file_title;
file = ::CreateFile(temp_file_in_temp.c_str(), FILE_ALL_ACCESS,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
CREATE_ALWAYS, 0, NULL);
ASSERT_TRUE(file != NULL);
ASSERT_TRUE(::CloseHandle(file));
// Give write access to the temp directory.
std::wstring temp_dir_wildcard = temp_dir + L"*";
EXPECT_TRUE(runner.AddFsRule(TargetPolicy::FILES_ALLOW_ANY,
temp_dir_wildcard.c_str()));
// Prepare the command to execute.
std::wstring command_write;
command_write += L"File_Create Write \"";
command_write += temp_file;
command_write += L"\"";
// Verify that we have write access to the original file
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(command_write.c_str()));
// Replace the subfolder by a reparse point to %temp%.
::DeleteFile(temp_file.c_str());
HANDLE dir = ::CreateFile(subfolder.c_str(), FILE_ALL_ACCESS,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
EXPECT_TRUE(INVALID_HANDLE_VALUE != dir);
std::wstring temp_dir_nt;
temp_dir_nt += L"\\??\\";
temp_dir_nt += temp_dir;
EXPECT_TRUE(SetReparsePoint(dir, temp_dir_nt.c_str()));
EXPECT_TRUE(::CloseHandle(dir));
// Try to open the file again.
EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(command_write.c_str()));
// Remove the reparse point.
dir = ::CreateFile(subfolder.c_str(), FILE_ALL_ACCESS,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT,
NULL);
EXPECT_TRUE(INVALID_HANDLE_VALUE != dir);
EXPECT_TRUE(DeleteReparsePoint(dir));
EXPECT_TRUE(::CloseHandle(dir));
// Cleanup.
EXPECT_TRUE(::DeleteFile(temp_file_in_temp.c_str()));
EXPECT_TRUE(::RemoveDirectory(subfolder.c_str()));
}
} // namespace sandbox