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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/time/time.h"
#include "base/win/scoped_handle.h"
namespace base {
namespace {
HANDLE GetCurrentProcessToken() {
HANDLE process_token;
OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &process_token);
DCHECK(process_token != NULL && process_token != INVALID_HANDLE_VALUE);
return process_token;
}
} // namespace
// static
const Time CurrentProcessInfo::CreationTime() {
FILETIME creation_time = {};
FILETIME ignore1 = {};
FILETIME ignore2 = {};
FILETIME ignore3 = {};
if (!::GetProcessTimes(::GetCurrentProcess(), &creation_time, &ignore1,
&ignore2, &ignore3)) {
return Time();
}
return Time::FromFileTime(creation_time);
}
IntegrityLevel GetCurrentProcessIntegrityLevel() {
HANDLE process_token(GetCurrentProcessToken());
DWORD token_info_length = 0;
if (::GetTokenInformation(process_token, 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(process_token, 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_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() {
HANDLE process_token(GetCurrentProcessToken());
// 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(process_token, TokenElevation, &elevation,
sizeof(elevation), &size)) {
PLOG(ERROR) << "GetTokenInformation() failed";
return false;
}
return !!elevation.TokenIsElevated;
}
} // namespace base
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