diff options
Diffstat (limited to 'chromium/chrome_elf/create_file/chrome_create_file_unittest.cc')
| -rw-r--r-- | chromium/chrome_elf/create_file/chrome_create_file_unittest.cc | 408 |
1 files changed, 408 insertions, 0 deletions
diff --git a/chromium/chrome_elf/create_file/chrome_create_file_unittest.cc b/chromium/chrome_elf/create_file/chrome_create_file_unittest.cc new file mode 100644 index 00000000000..5b776073681 --- /dev/null +++ b/chromium/chrome_elf/create_file/chrome_create_file_unittest.cc @@ -0,0 +1,408 @@ +// Copyright 2014 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_elf/create_file/chrome_create_file.h" + +#include <windows.h> + +#include <bitset> +#include <string> + +#include "base/base_paths_win.h" +#include "base/file_util.h" +#include "base/files/file_path.h" +#include "base/files/scoped_temp_dir.h" +#include "base/path_service.h" +#include "base/threading/platform_thread.h" +#include "base/win/iat_patch_function.h" +#include "base/win/scoped_handle.h" +#include "base/win/windows_version.h" +#include "chrome_elf/chrome_elf_constants.h" +#include "chrome_elf/ntdll_cache.h" +#include "sandbox/win/src/interception_internal.h" +#include "sandbox/win/src/nt_internals.h" +#include "testing/gtest/include/gtest/gtest.h" +#include "testing/platform_test.h" + + +namespace { + +// Test fixtures ------------------------------------------------------------- + +class ChromeCreateFileTest : public PlatformTest { + protected: + struct NtCreateFileParams { + ACCESS_MASK desired_access; + OBJECT_ATTRIBUTES object_attributes; + PLARGE_INTEGER allocation_size; + ULONG file_attributes; + ULONG share_access; + ULONG create_disposition; + ULONG create_options; + PVOID ea_buffer; + ULONG ea_length; + }; + + enum CallPath { + ELF, + KERNEL + }; + + template<CallPath path> + static NTSTATUS WINAPI FakeNtCreateFile( + PHANDLE file_handle, + ACCESS_MASK desired_access, + POBJECT_ATTRIBUTES object_attributes, + PIO_STATUS_BLOCK io_status_block, + PLARGE_INTEGER allocation_size, + ULONG file_attributes, + ULONG share_access, + ULONG create_disposition, + ULONG create_options, + PVOID ea_buffer, + ULONG ea_length) { + return self_->HandleCreateFileCall(file_handle, + desired_access, + object_attributes, + io_status_block, + allocation_size, + file_attributes, + share_access, + create_disposition, + create_options, + ea_buffer, + ea_length, + path); + } + + virtual void SetUp() OVERRIDE { + original_thread_ = base::PlatformThread::CurrentId(); + InitCache(); + PlatformTest::SetUp(); + + base::FilePath user_data_dir; + PathService::Get(base::DIR_LOCAL_APP_DATA, &user_data_dir); + ASSERT_TRUE(temp_dir_.CreateUniqueTempDirUnderPath(user_data_dir)); + ASSERT_TRUE(temp_dir2_.CreateUniqueTempDir()); + self_ = this; + } + + void UnsetThunkStorage() { + DWORD old_protect = 0; + EXPECT_TRUE(::VirtualProtect(&g_nt_thunk_storage, + sizeof(g_nt_thunk_storage), + PAGE_EXECUTE_READWRITE, + &old_protect)); + memset(&g_nt_thunk_storage, 0, sizeof(g_nt_thunk_storage)); + + EXPECT_TRUE(::VirtualProtect(&g_nt_thunk_storage, + sizeof(g_nt_thunk_storage), + PAGE_EXECUTE_READ, + &old_protect)); + } + + void RedirectNtCreateFileCalls() { + UnsetThunkStorage(); + old_func_ptr_ = + reinterpret_cast<NtCreateFileFunction>(g_ntdll_lookup["NtCreateFile"]); + + // KernelBase.dll only exists for Win7 and later, prior to that, kernel32 + // imports from ntdll directly. + if (base::win::GetVersion() < base::win::VERSION_WIN7) { + patcher_.Patch(L"kernel32.dll", "ntdll.dll", "NtCreateFile", + reinterpret_cast<void(*)()>(&FakeNtCreateFile<KERNEL>)); + } else { + patcher_.Patch(L"kernelbase.dll", "ntdll.dll", "NtCreateFile", + reinterpret_cast<void(*)()>(&FakeNtCreateFile<KERNEL>)); + } + + g_ntdll_lookup["NtCreateFile"] = reinterpret_cast<void(*)()>( + &ChromeCreateFileTest::FakeNtCreateFile<ELF>); + } + + void ResetNtCreateFileCalls() { + g_ntdll_lookup["NtCreateFile"] = reinterpret_cast<void*>(old_func_ptr_); + patcher_.Unpatch(); + } + + NTSTATUS HandleCreateFileCall(PHANDLE file_handle, + ACCESS_MASK desired_access, + POBJECT_ATTRIBUTES object_attributes, + PIO_STATUS_BLOCK io_status_block, + PLARGE_INTEGER allocation_size, + ULONG file_attributes, + ULONG share_access, + ULONG create_disposition, + ULONG create_options, + PVOID ea_buffer, + ULONG ea_length, + CallPath call_path) { + if (original_thread_ == base::PlatformThread::CurrentId()) { + SetParams(desired_access, + object_attributes, + allocation_size, + file_attributes, + share_access, + create_disposition, + create_options, + ea_buffer, + ea_length, + call_path == ELF ? &elf_params_ : &kernel_params_); + } + + // Forward the call to the real NTCreateFile. + return old_func_ptr_(file_handle, + desired_access, + object_attributes, + io_status_block, + allocation_size, + file_attributes, + share_access, + create_disposition, + create_options, + ea_buffer, + ea_length); + } + + void SetParams(ACCESS_MASK desired_access, + POBJECT_ATTRIBUTES object_attributes, + PLARGE_INTEGER allocation_size, + ULONG file_attributes, + ULONG share_access, + ULONG create_disposition, + ULONG create_options, + PVOID ea_buffer, + ULONG ea_length, + NtCreateFileParams* params) { + params->desired_access = desired_access; + params->object_attributes.Length = object_attributes->Length; + params->object_attributes.ObjectName = object_attributes->ObjectName; + params->object_attributes.RootDirectory = object_attributes->RootDirectory; + params->object_attributes.Attributes = object_attributes->Attributes; + params->object_attributes.SecurityDescriptor = + object_attributes->SecurityDescriptor; + params->object_attributes.SecurityQualityOfService = + object_attributes->SecurityQualityOfService; + params->allocation_size = allocation_size; + params->file_attributes = file_attributes; + params->share_access = share_access; + params->create_disposition = create_disposition; + params->create_options = create_options; + params->ea_buffer = ea_buffer; + params->ea_length = ea_length; + } + + void CheckParams() { + std::bitset<32> elf((int) elf_params_.desired_access); + std::bitset<32> ker((int) kernel_params_.desired_access); + + EXPECT_EQ(kernel_params_.desired_access, elf_params_.desired_access) + << elf << "\n" << ker; + EXPECT_EQ(kernel_params_.object_attributes.Length, + elf_params_.object_attributes.Length); + EXPECT_EQ(kernel_params_.object_attributes.RootDirectory, + elf_params_.object_attributes.RootDirectory); + EXPECT_EQ(kernel_params_.object_attributes.Attributes, + elf_params_.object_attributes.Attributes); + EXPECT_EQ(kernel_params_.object_attributes.SecurityDescriptor, + elf_params_.object_attributes.SecurityDescriptor); + EXPECT_EQ(kernel_params_.allocation_size, elf_params_.allocation_size); + EXPECT_EQ(kernel_params_.file_attributes, elf_params_.file_attributes); + EXPECT_EQ(kernel_params_.share_access, elf_params_.share_access); + EXPECT_EQ(kernel_params_.create_disposition, + elf_params_.create_disposition); + EXPECT_EQ(kernel_params_.create_options, elf_params_.create_options); + EXPECT_EQ(kernel_params_.ea_buffer, elf_params_.ea_buffer); + EXPECT_EQ(kernel_params_.ea_length, elf_params_.ea_length); + } + + void DoWriteCheck(const base::FilePath& path, DWORD flag, bool is_system) { + base::win::ScopedHandle file_handle; + const char kTestData[] = "0123456789"; + int buffer_size = sizeof(kTestData) - 1; + DWORD bytes_written; + + if (is_system) { + file_handle.Set(::CreateFileW(path.value().c_str(), + GENERIC_WRITE, + FILE_SHARE_READ, + NULL, + CREATE_ALWAYS, + FILE_ATTRIBUTE_NORMAL | flag, + NULL)); + } else { + file_handle.Set(CreateFileNTDLL(path.value().c_str(), + GENERIC_WRITE, + FILE_SHARE_READ, + NULL, + CREATE_ALWAYS, + FILE_ATTRIBUTE_NORMAL | flag, + NULL)); + } + + + EXPECT_FALSE(file_handle == INVALID_HANDLE_VALUE); + ::WriteFile(file_handle, kTestData, buffer_size, &bytes_written, NULL); + EXPECT_EQ(buffer_size, bytes_written); + } + + void DoReadCheck(const base::FilePath& path, DWORD flag, bool is_system) { + base::win::ScopedHandle file_handle; + const char kTestData[] = "0123456789"; + int buffer_size = sizeof(kTestData) - 1; + DWORD bytes_read; + char read_buffer[10]; + + if (is_system) { + file_handle.Set(::CreateFileW(path.value().c_str(), + GENERIC_READ, + 0, + NULL, + OPEN_ALWAYS, + FILE_ATTRIBUTE_NORMAL | flag, + NULL)); + } else { + file_handle.Set(CreateFileNTDLL(path.value().c_str(), + GENERIC_READ, + 0, + NULL, + OPEN_ALWAYS, + FILE_ATTRIBUTE_NORMAL | flag, + NULL)); + } + + EXPECT_FALSE(file_handle == INVALID_HANDLE_VALUE); + ::ReadFile(file_handle, read_buffer, buffer_size, &bytes_read, NULL); + EXPECT_EQ(buffer_size, bytes_read); + EXPECT_EQ(0, memcmp(kTestData, read_buffer, bytes_read)); + } + + void RunChecks(DWORD flag, bool check_reads) { + // Make sure we can write to this file handle when called via the system. + base::FilePath junk_path_1 = temp_dir_.path().Append(L"junk_1.txt"); + base::FilePath junk_path_2 = temp_dir_.path().Append(L"junk_2.txt"); + DoWriteCheck(junk_path_1, flag, true); + DoWriteCheck(junk_path_2, flag, false); + CheckParams(); + + if (check_reads) { + // Make sure we can read from this file handle when called via the system. + DoReadCheck(junk_path_1, flag, true); + DoReadCheck(junk_path_2, flag, false); + CheckParams(); + } + base::DeleteFile(junk_path_1, false); + base::DeleteFile(junk_path_2, false); + + } + + static ChromeCreateFileTest* self_; + + NtCreateFileFunction old_func_ptr_; + base::ScopedTempDir temp_dir_; + base::ScopedTempDir temp_dir2_; + base::win::IATPatchFunction patcher_; + NtCreateFileParams kernel_params_; + NtCreateFileParams elf_params_; + base::PlatformThreadId original_thread_; +}; + +ChromeCreateFileTest* ChromeCreateFileTest::self_ = NULL; + +// Tests --------------------------------------------------------------------- +TEST_F(ChromeCreateFileTest, CheckParams_FILE_ATTRIBUTE_NORMAL) { + RedirectNtCreateFileCalls(); + RunChecks(FILE_ATTRIBUTE_NORMAL, true); + ResetNtCreateFileCalls(); +} + +TEST_F(ChromeCreateFileTest, CheckParams_FILE_FLAG_WRITE_THROUGH) { + RedirectNtCreateFileCalls(); + RunChecks(FILE_FLAG_WRITE_THROUGH, true); + ResetNtCreateFileCalls(); +} + +TEST_F(ChromeCreateFileTest, CheckParams_FILE_FLAG_RANDOM_ACCESS) { + RedirectNtCreateFileCalls(); + RunChecks(FILE_FLAG_RANDOM_ACCESS, true); + ResetNtCreateFileCalls(); +} + +TEST_F(ChromeCreateFileTest, CheckParams_FILE_FLAG_SEQUENTIAL_SCAN) { + RedirectNtCreateFileCalls(); + RunChecks(FILE_FLAG_SEQUENTIAL_SCAN, true); + ResetNtCreateFileCalls(); +} + +TEST_F(ChromeCreateFileTest, CheckParams_FILE_FLAG_DELETE_ON_CLOSE) { + RedirectNtCreateFileCalls(); + RunChecks(FILE_FLAG_DELETE_ON_CLOSE, false); + ResetNtCreateFileCalls(); +} + +TEST_F(ChromeCreateFileTest, CheckParams_FILE_FLAG_BACKUP_SEMANTICS) { + RedirectNtCreateFileCalls(); + RunChecks(FILE_FLAG_BACKUP_SEMANTICS, true); + ResetNtCreateFileCalls(); +} + +TEST_F(ChromeCreateFileTest, CheckParams_FILE_FLAG_OPEN_REPARSE_POINT) { + RedirectNtCreateFileCalls(); + RunChecks(FILE_FLAG_OPEN_REPARSE_POINT, true); + ResetNtCreateFileCalls(); +} + +TEST_F(ChromeCreateFileTest, CheckParams_FILE_FLAG_OPEN_NO_RECALL) { + RedirectNtCreateFileCalls(); + RunChecks(FILE_FLAG_OPEN_NO_RECALL, true); + ResetNtCreateFileCalls(); +} + +TEST_F(ChromeCreateFileTest, BypassTest) { + std::wstring UNC_filepath_file(L"\\\\.\\some_file.txt"); + + base::FilePath local_path; + PathService::Get(base::DIR_LOCAL_APP_DATA, &local_path); + + base::FilePath local_prefs_path = local_path.Append(kAppDataDirName).Append( + kUserDataDirName).Append(L"default\\Preferences"); + base::FilePath local_state_path = local_path.Append(kAppDataDirName).Append( + kUserDataDirName).Append(L"ninja\\Local State"); + base::FilePath local_junk_path = local_path.Append(kAppDataDirName).Append( + kUserDataDirName).Append(L"default\\Junk"); + + base::FilePath desktop_path; + PathService::Get(base::DIR_USER_DESKTOP, &desktop_path); + base::FilePath desktop_junk_path = + desktop_path.Append(L"Downloads\\junk.txt"); + base::FilePath desktop_prefs_path = + desktop_path.Append(L"Downloads\\Preferences"); + + // Don't redirect UNC files. + EXPECT_FALSE(ShouldBypass(UNC_filepath_file.c_str())); + + // Don't redirect if file is not in UserData directory. + EXPECT_FALSE(ShouldBypass(desktop_junk_path.value().c_str())); + EXPECT_FALSE(ShouldBypass(desktop_prefs_path.value().c_str())); + + // Only redirect "Preferences" and "Local State" files. + EXPECT_TRUE(ShouldBypass(local_prefs_path.value().c_str())); + EXPECT_TRUE(ShouldBypass(local_state_path.value().c_str())); + EXPECT_FALSE(ShouldBypass(local_junk_path.value().c_str())); +} + +TEST_F(ChromeCreateFileTest, ReadWriteFromNtDll) { + UnsetThunkStorage(); + base::FilePath file_name = temp_dir_.path().Append(L"some_file.txt"); + DoWriteCheck(file_name, FILE_ATTRIBUTE_NORMAL, false); + DoReadCheck(file_name, FILE_ATTRIBUTE_NORMAL, false); +} + +TEST_F(ChromeCreateFileTest, ReadWriteFromThunk) { + base::FilePath file_name = temp_dir_.path().Append(L"some_file.txt"); + DoWriteCheck(file_name, FILE_ATTRIBUTE_NORMAL, false); + DoReadCheck(file_name, FILE_ATTRIBUTE_NORMAL, false); +} + +} // namespace |