Remove sandbox on Windows.

sandbox/win/src/win_utils.cc

Index: sandbox/win/src/win_utils.cc
diff --git a/sandbox/win/src/win_utils.cc b/sandbox/win/src/win_utils.cc
deleted file mode 100644
index ef4d803ab6d94c142f88e60b928d930542697503..0000000000000000000000000000000000000000
--- a/sandbox/win/src/win_utils.cc
+++ /dev/null
@@ -1,428 +0,0 @@
-// 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 "sandbox/win/src/win_utils.h"
-
-#include <stddef.h>
-
-#include <map>
-
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/strings/string_util.h"
-#include "base/win/pe_image.h"
-#include "sandbox/win/src/internal_types.h"
-#include "sandbox/win/src/nt_internals.h"
-#include "sandbox/win/src/sandbox_nt_util.h"
-
-namespace {
-
-// Holds the information about a known registry key.
-struct KnownReservedKey {
-  const wchar_t* name;
-  HKEY key;
-};
-
-// Contains all the known registry key by name and by handle.
-const KnownReservedKey kKnownKey[] = {
-    { L"HKEY_CLASSES_ROOT", HKEY_CLASSES_ROOT },
-    { L"HKEY_CURRENT_USER", HKEY_CURRENT_USER },
-    { L"HKEY_LOCAL_MACHINE", HKEY_LOCAL_MACHINE},
-    { L"HKEY_USERS", HKEY_USERS},
-    { L"HKEY_PERFORMANCE_DATA", HKEY_PERFORMANCE_DATA},
-    { L"HKEY_PERFORMANCE_TEXT", HKEY_PERFORMANCE_TEXT},
-    { L"HKEY_PERFORMANCE_NLSTEXT", HKEY_PERFORMANCE_NLSTEXT},
-    { L"HKEY_CURRENT_CONFIG", HKEY_CURRENT_CONFIG},
-    { L"HKEY_DYN_DATA", HKEY_DYN_DATA}
-};
-
-// These functions perform case independent path comparisons.
-bool EqualPath(const base::string16& first, const base::string16& second) {
-  return _wcsicmp(first.c_str(), second.c_str()) == 0;
-}
-
-bool EqualPath(const base::string16& first, size_t first_offset,
-               const base::string16& second, size_t second_offset) {
-  return _wcsicmp(first.c_str() + first_offset,
-                  second.c_str() + second_offset) == 0;
-}
-
-bool EqualPath(const base::string16& first,
-               const wchar_t* second, size_t second_len) {
-  return _wcsnicmp(first.c_str(), second, second_len) == 0;
-}
-
-bool EqualPath(const base::string16& first, size_t first_offset,
-               const wchar_t* second, size_t second_len) {
-  return _wcsnicmp(first.c_str() + first_offset, second, second_len) == 0;
-}
-
-// Returns true if |path| starts with "\??\" and returns a path without that
-// component.
-bool IsNTPath(const base::string16& path, base::string16* trimmed_path ) {
-  if ((path.size() < sandbox::kNTPrefixLen) ||
-      (0 != path.compare(0, sandbox::kNTPrefixLen, sandbox::kNTPrefix))) {
-    *trimmed_path = path;
-    return false;
-  }
-
-  *trimmed_path = path.substr(sandbox::kNTPrefixLen);
-  return true;
-}
-
-// Returns true if |path| starts with "\Device\" and returns a path without that
-// component.
-bool IsDevicePath(const base::string16& path, base::string16* trimmed_path ) {
-  if ((path.size() < sandbox::kNTDevicePrefixLen) ||
-      (!EqualPath(path, sandbox::kNTDevicePrefix,
-                  sandbox::kNTDevicePrefixLen))) {
-    *trimmed_path = path;
-    return false;
-  }
-
-  *trimmed_path = path.substr(sandbox::kNTDevicePrefixLen);
-  return true;
-}
-
-bool StartsWithDriveLetter(const base::string16& path) {
-  if (path.size() < 3)
-    return false;
-
-  if (path[1] != L':' || path[2] != L'\\')
-    return false;
-
-  return (path[0] >= 'a' && path[0] <= 'z') ||
-         (path[0] >= 'A' && path[0] <= 'Z');
-}
-
-const wchar_t kNTDotPrefix[] = L"\\\\.\\";
-const size_t kNTDotPrefixLen = arraysize(kNTDotPrefix) - 1;
-
-// Removes "\\\\.\\" from the path.
-void RemoveImpliedDevice(base::string16* path) {
-  if (0 == path->compare(0, kNTDotPrefixLen, kNTDotPrefix))
-    *path = path->substr(kNTDotPrefixLen);
-}
-
-}  // namespace
-
-namespace sandbox {
-
-// Returns true if the provided path points to a pipe.
-bool IsPipe(const base::string16& path) {
-  size_t start = 0;
-  if (0 == path.compare(0, sandbox::kNTPrefixLen, sandbox::kNTPrefix))
-    start = sandbox::kNTPrefixLen;
-
-  const wchar_t kPipe[] = L"pipe\\";
-  if (path.size() < start + arraysize(kPipe) - 1)
-    return false;
-
-  return EqualPath(path, start, kPipe, arraysize(kPipe) - 1);
-}
-
-HKEY GetReservedKeyFromName(const base::string16& name) {
-  for (size_t i = 0; i < arraysize(kKnownKey); ++i) {
-    if (name == kKnownKey[i].name)
-      return kKnownKey[i].key;
-  }
-
-  return NULL;
-}
-
-bool ResolveRegistryName(base::string16 name, base::string16* resolved_name) {
-  for (size_t i = 0; i < arraysize(kKnownKey); ++i) {
-    if (name.find(kKnownKey[i].name) == 0) {
-      HKEY key;
-      DWORD disposition;
-      if (ERROR_SUCCESS != ::RegCreateKeyEx(kKnownKey[i].key, L"", 0, NULL, 0,
-                                            MAXIMUM_ALLOWED, NULL, &key,
-                                            &disposition))
-        return false;
-
-      bool result = GetPathFromHandle(key, resolved_name);
-      ::RegCloseKey(key);
-
-      if (!result)
-        return false;
-
-      *resolved_name += name.substr(wcslen(kKnownKey[i].name));
-      return true;
-    }
-  }
-
-  return false;
-}
-
-// |full_path| can have any of the following forms:
-//    \??\c:\some\foo\bar
-//    \Device\HarddiskVolume0\some\foo\bar
-//    \??\HarddiskVolume0\some\foo\bar
-DWORD IsReparsePoint(const base::string16& full_path) {
-  // Check if it's a pipe. We can't query the attributes of a pipe.
-  if (IsPipe(full_path))
-    return ERROR_NOT_A_REPARSE_POINT;
-
-  base::string16 path;
-  bool nt_path = IsNTPath(full_path, &path);
-  bool has_drive = StartsWithDriveLetter(path);
-  bool is_device_path = IsDevicePath(path, &path);
-
-  if (!has_drive && !is_device_path && !nt_path)
-    return ERROR_INVALID_NAME;
-
-  bool added_implied_device = false;
-  if (!has_drive) {
-      path = base::string16(kNTDotPrefix) + path;
-      added_implied_device = true;
-  }
-
-  base::string16::size_type last_pos = base::string16::npos;
-  bool passed_once = false;
-
-  do {
-    path = path.substr(0, last_pos);
-
-    DWORD attributes = ::GetFileAttributes(path.c_str());
-    if (INVALID_FILE_ATTRIBUTES == attributes) {
-      DWORD error = ::GetLastError();
-      if (error != ERROR_FILE_NOT_FOUND &&
-          error != ERROR_PATH_NOT_FOUND &&
-          error != ERROR_INVALID_NAME) {
-        // Unexpected error.
-        if (passed_once && added_implied_device &&
-            (path.rfind(L'\\') == kNTDotPrefixLen - 1)) {
-          break;
-        }
-        NOTREACHED_NT();
-        return error;
-      }
-    } else if (FILE_ATTRIBUTE_REPARSE_POINT & attributes) {
-      // This is a reparse point.
-      return ERROR_SUCCESS;
-    }
-
-    passed_once = true;
-    last_pos = path.rfind(L'\\');
-  } while (last_pos > 2);  // Skip root dir.
-
-  return ERROR_NOT_A_REPARSE_POINT;
-}
-
-// We get a |full_path| of the forms accepted by IsReparsePoint(), and the name
-// we'll get from |handle| will be \device\harddiskvolume1\some\foo\bar.
-bool SameObject(HANDLE handle, const wchar_t* full_path) {
-  // Check if it's a pipe.
-  if (IsPipe(full_path))
-    return true;
-
-  base::string16 actual_path;
-  if (!GetPathFromHandle(handle, &actual_path))
-    return false;
-
-  base::string16 path(full_path);
-  DCHECK_NT(!path.empty());
-
-  // This may end with a backslash.
-  const wchar_t kBackslash = '\\';
-  if (path.back() == kBackslash)
-    path = path.substr(0, path.length() - 1);
-
-  // Perfect match (case-insesitive check).
-  if (EqualPath(actual_path, path))
-    return true;
-
-  bool nt_path = IsNTPath(path, &path);
-  bool has_drive = StartsWithDriveLetter(path);
-
-  if (!has_drive && nt_path) {
-    base::string16 simple_actual_path;
-    if (!IsDevicePath(actual_path, &simple_actual_path))
-      return false;
-
-    // Perfect match (case-insesitive check).
-    return (EqualPath(simple_actual_path, path));
-  }
-
-  if (!has_drive)
-    return false;
-
-  // We only need 3 chars, but let's alloc a buffer for four.
-  wchar_t drive[4] = {0};
-  wchar_t vol_name[MAX_PATH];
-  memcpy(drive, &path[0], 2 * sizeof(*drive));
-
-  // We'll get a double null terminated string.
-  DWORD vol_length = ::QueryDosDeviceW(drive, vol_name, MAX_PATH);
-  if (vol_length < 2 || vol_length == MAX_PATH)
-    return false;
-
-  // Ignore the nulls at the end.
-  vol_length = static_cast<DWORD>(wcslen(vol_name));
-
-  // The two paths should be the same length.
-  if (vol_length + path.size() - 2 != actual_path.size())
-    return false;
-
-  // Check up to the drive letter.
-  if (!EqualPath(actual_path, vol_name, vol_length))
-    return false;
-
-  // Check the path after the drive letter.
-  if (!EqualPath(actual_path, vol_length, path, 2))
-    return false;
-
-  return true;
-}
-
-// Paths like \Device\HarddiskVolume0\some\foo\bar are assumed to be already
-// expanded.
-bool ConvertToLongPath(base::string16* path) {
-  if (IsPipe(*path))
-    return true;
-
-  base::string16 temp_path;
-  if (IsDevicePath(*path, &temp_path))
-    return false;
-
-  bool is_nt_path = IsNTPath(temp_path, &temp_path);
-  bool added_implied_device = false;
-  if (!StartsWithDriveLetter(temp_path) && is_nt_path) {
-    temp_path = base::string16(kNTDotPrefix) + temp_path;
-    added_implied_device = true;
-  }
-
-  DWORD size = MAX_PATH;
-  scoped_ptr<wchar_t[]> long_path_buf(new wchar_t[size]);
-
-  DWORD return_value = ::GetLongPathName(temp_path.c_str(), long_path_buf.get(),
-                                         size);
-  while (return_value >= size) {
-    size *= 2;
-    long_path_buf.reset(new wchar_t[size]);
-    return_value = ::GetLongPathName(temp_path.c_str(), long_path_buf.get(),
-                                     size);
-  }
-
-  DWORD last_error = ::GetLastError();
-  if (0 == return_value && (ERROR_FILE_NOT_FOUND == last_error ||
-                            ERROR_PATH_NOT_FOUND == last_error ||
-                            ERROR_INVALID_NAME == last_error)) {
-    // The file does not exist, but maybe a sub path needs to be expanded.
-    base::string16::size_type last_slash = temp_path.rfind(L'\\');
-    if (base::string16::npos == last_slash)
-      return false;
-
-    base::string16 begin = temp_path.substr(0, last_slash);
-    base::string16 end = temp_path.substr(last_slash);
-    if (!ConvertToLongPath(&begin))
-      return false;
-
-    // Ok, it worked. Let's reset the return value.
-    temp_path = begin + end;
-    return_value = 1;
-  } else if (0 != return_value) {
-    temp_path = long_path_buf.get();
-  }
-
-  if (return_value != 0) {
-    if (added_implied_device)
-      RemoveImpliedDevice(&temp_path);
-
-    if (is_nt_path) {
-      *path = kNTPrefix;
-      *path += temp_path;
-    } else {
-      *path = temp_path;
-    }
-
-    return true;
-  }
-
-  return false;
-}
-
-bool GetPathFromHandle(HANDLE handle, base::string16* path) {
-  NtQueryObjectFunction NtQueryObject = NULL;
-  ResolveNTFunctionPtr("NtQueryObject", &NtQueryObject);
-
-  OBJECT_NAME_INFORMATION initial_buffer;
-  OBJECT_NAME_INFORMATION* name = &initial_buffer;
-  ULONG size = sizeof(initial_buffer);
-  // Query the name information a first time to get the size of the name.
-  // Windows XP requires that the size of the buffer passed in here be != 0.
-  NTSTATUS status = NtQueryObject(handle, ObjectNameInformation, name, size,
-                                  &size);
-
-  scoped_ptr<BYTE[]> name_ptr;
-  if (size) {
-    name_ptr.reset(new BYTE[size]);
-    name = reinterpret_cast<OBJECT_NAME_INFORMATION*>(name_ptr.get());
-
-    // Query the name information a second time to get the name of the
-    // object referenced by the handle.
-    status = NtQueryObject(handle, ObjectNameInformation, name, size, &size);
-  }
-
-  if (STATUS_SUCCESS != status)
-    return false;
-
-  path->assign(name->ObjectName.Buffer, name->ObjectName.Length /
-                                        sizeof(name->ObjectName.Buffer[0]));
-  return true;
-}
-
-bool GetNtPathFromWin32Path(const base::string16& path,
-                            base::string16* nt_path) {
-  HANDLE file = ::CreateFileW(path.c_str(), 0,
-    FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
-    OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
-  if (file == INVALID_HANDLE_VALUE)
-    return false;
-  bool rv = GetPathFromHandle(file, nt_path);
-  ::CloseHandle(file);
-  return rv;
-}
-
-bool WriteProtectedChildMemory(HANDLE child_process, void* address,
-                               const void* buffer, size_t length) {
-  // First, remove the protections.
-  DWORD old_protection;
-  if (!::VirtualProtectEx(child_process, address, length,
-                          PAGE_WRITECOPY, &old_protection))
-    return false;
-
-  SIZE_T written;
-  bool ok = ::WriteProcessMemory(child_process, address, buffer, length,
-                                 &written) && (length == written);
-
-  // Always attempt to restore the original protection.
-  if (!::VirtualProtectEx(child_process, address, length,
-                          old_protection, &old_protection))
-    return false;
-
-  return ok;
-}
-
-};  // namespace sandbox
-
-void ResolveNTFunctionPtr(const char* name, void* ptr) {
-  static volatile HMODULE ntdll = NULL;
-
-  if (!ntdll) {
-    HMODULE ntdll_local = ::GetModuleHandle(sandbox::kNtdllName);
-    // Use PEImage to sanity-check that we have a valid ntdll handle.
-    base::win::PEImage ntdll_peimage(ntdll_local);
-    CHECK_NT(ntdll_peimage.VerifyMagic());
-    // Race-safe way to set static ntdll.
-    ::InterlockedCompareExchangePointer(
-        reinterpret_cast<PVOID volatile*>(&ntdll), ntdll_local, NULL);
-
-  }
-
-  CHECK_NT(ntdll);
-  FARPROC* function_ptr = reinterpret_cast<FARPROC*>(ptr);
-  *function_ptr = ::GetProcAddress(ntdll, name);
-  CHECK_NT(*function_ptr);
-}