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// 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.
#include "base/process/process_info.h"
#include <windows.h>
#include <memory>
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/notreached.h"
#include "base/time/time.h"
#include "base/win/scoped_handle.h"
namespace base {
namespace {
base::win::ScopedHandle CreateCurrentProcessToken() {
// OpenProcessToken can fail due to permission or allocation failures
// for the kernel object. Return nullptr in those cases.
HANDLE process_token = nullptr;
OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &process_token);
return base::win::ScopedHandle(process_token);
}
} // namespace
IntegrityLevel GetCurrentProcessIntegrityLevel() {
base::win::ScopedHandle scoped_process_token(CreateCurrentProcessToken());
DWORD token_info_length = 0;
if (::GetTokenInformation(scoped_process_token.Get(), TokenIntegrityLevel,
nullptr, 0, &token_info_length) ||
::GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
return INTEGRITY_UNKNOWN;
}
auto token_label_bytes = std::make_unique<char[]>(token_info_length);
TOKEN_MANDATORY_LABEL* token_label =
reinterpret_cast<TOKEN_MANDATORY_LABEL*>(token_label_bytes.get());
if (!::GetTokenInformation(scoped_process_token.Get(), TokenIntegrityLevel,
token_label, token_info_length,
&token_info_length)) {
return INTEGRITY_UNKNOWN;
}
DWORD integrity_level = *::GetSidSubAuthority(
token_label->Label.Sid,
static_cast<DWORD>(*::GetSidSubAuthorityCount(token_label->Label.Sid) -
1));
if (integrity_level < SECURITY_MANDATORY_LOW_RID)
return UNTRUSTED_INTEGRITY;
if (integrity_level < SECURITY_MANDATORY_MEDIUM_RID)
return LOW_INTEGRITY;
if (integrity_level >= SECURITY_MANDATORY_MEDIUM_RID &&
integrity_level < SECURITY_MANDATORY_HIGH_RID) {
return MEDIUM_INTEGRITY;
}
if (integrity_level >= SECURITY_MANDATORY_HIGH_RID)
return HIGH_INTEGRITY;
NOTREACHED();
return INTEGRITY_UNKNOWN;
}
bool IsCurrentProcessElevated() {
base::win::ScopedHandle scoped_process_token(CreateCurrentProcessToken());
// Unlike TOKEN_ELEVATION_TYPE which returns TokenElevationTypeDefault when
// UAC is turned off, TOKEN_ELEVATION returns whether the process is elevated.
DWORD size;
TOKEN_ELEVATION elevation;
if (!GetTokenInformation(scoped_process_token.Get(), TokenElevation,
&elevation, sizeof(elevation), &size)) {
PLOG(ERROR) << "GetTokenInformation() failed";
return false;
}
return !!elevation.TokenIsElevated;
}
} // namespace base
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