diff options
Diffstat (limited to 'rlz/win/lib/lib_mutex.cc')
-rw-r--r-- | rlz/win/lib/lib_mutex.cc | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/rlz/win/lib/lib_mutex.cc b/rlz/win/lib/lib_mutex.cc deleted file mode 100644 index 73dfade..0000000 --- a/rlz/win/lib/lib_mutex.cc +++ /dev/null @@ -1,67 +0,0 @@ -// Copyright (c) 2012 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. -// -// Mutex to guarantee serialization of RLZ key accesses. - -#include "rlz/win/lib/lib_mutex.h" - -#include <windows.h> -#include <Sddl.h> // For SDDL_REVISION_1, ConvertStringSecurityDescript.. -#include <Aclapi.h> // For SetSecurityInfo - -#include "base/logging.h" -#include "base/win/windows_version.h" - -namespace { - -const wchar_t kMutexName[] = L"{A946A6A9-917E-4949-B9BC-6BADA8C7FD63}"; - -} // namespace anonymous - -namespace rlz_lib { - -// Needed to allow synchronization across integrity levels. -static bool SetObjectToLowIntegrity(HANDLE object, - SE_OBJECT_TYPE type = SE_KERNEL_OBJECT) { - if (base::win::GetVersion() < base::win::VERSION_VISTA) - return true; // Not needed on XP. - - // The LABEL_SECURITY_INFORMATION SDDL SACL to be set for low integrity. - static const wchar_t kLowIntegritySddlSacl[] = L"S:(ML;;NW;;;LW)"; - - bool result = false; - DWORD error = ERROR_SUCCESS; - PSECURITY_DESCRIPTOR security_descriptor = NULL; - PACL sacl = NULL; - BOOL sacl_present = FALSE; - BOOL sacl_defaulted = FALSE; - - if (ConvertStringSecurityDescriptorToSecurityDescriptorW( - kLowIntegritySddlSacl, SDDL_REVISION_1, &security_descriptor, NULL)) { - if (GetSecurityDescriptorSacl(security_descriptor, &sacl_present, - &sacl, &sacl_defaulted)) { - error = SetSecurityInfo(object, type, LABEL_SECURITY_INFORMATION, - NULL, NULL, NULL, sacl); - result = (ERROR_SUCCESS == error); - } - LocalFree(security_descriptor); - } - - return result; -} - -LibMutex::LibMutex() : acquired_(false), mutex_(NULL) { - mutex_ = CreateMutex(NULL, false, kMutexName); - bool result = SetObjectToLowIntegrity(mutex_); - if (result) { - acquired_ = (WAIT_OBJECT_0 == WaitForSingleObject(mutex_, 5000L)); - } -} - -LibMutex::~LibMutex() { - if (acquired_) ReleaseMutex(mutex_); - CloseHandle(mutex_); -} - -} // namespace rlz_lib |