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// Copyright 2015 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/top_level_dispatcher.h"
#include <stdint.h>
#include <string.h>
#include "base/logging.h"
#include "sandbox/win/src/crosscall_server.h"
#include "sandbox/win/src/filesystem_dispatcher.h"
#include "sandbox/win/src/handle_dispatcher.h"
#include "sandbox/win/src/interception.h"
#include "sandbox/win/src/internal_types.h"
#include "sandbox/win/src/ipc_tags.h"
#include "sandbox/win/src/line_break_dispatcher.h"
#include "sandbox/win/src/named_pipe_dispatcher.h"
#include "sandbox/win/src/process_mitigations_win32k_dispatcher.h"
#include "sandbox/win/src/process_thread_dispatcher.h"
#include "sandbox/win/src/registry_dispatcher.h"
#include "sandbox/win/src/sandbox_policy_base.h"
#include "sandbox/win/src/signed_dispatcher.h"
#include "sandbox/win/src/sync_dispatcher.h"
namespace sandbox {
TopLevelDispatcher::TopLevelDispatcher(PolicyBase* policy) : policy_(policy) {
// Initialize the IPC dispatcher array.
memset(ipc_targets_, 0, sizeof(ipc_targets_));
Dispatcher* dispatcher;
dispatcher = new FilesystemDispatcher(policy_);
ipc_targets_[static_cast<size_t>(IpcTag::NTCREATEFILE)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::NTOPENFILE)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::NTSETINFO_RENAME)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::NTQUERYATTRIBUTESFILE)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::NTQUERYFULLATTRIBUTESFILE)] =
dispatcher;
filesystem_dispatcher_.reset(dispatcher);
dispatcher = new NamedPipeDispatcher(policy_);
ipc_targets_[static_cast<size_t>(IpcTag::CREATENAMEDPIPEW)] = dispatcher;
named_pipe_dispatcher_.reset(dispatcher);
dispatcher = new ThreadProcessDispatcher(policy_);
ipc_targets_[static_cast<size_t>(IpcTag::NTOPENTHREAD)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::NTOPENPROCESS)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::CREATEPROCESSW)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::NTOPENPROCESSTOKEN)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::NTOPENPROCESSTOKENEX)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::CREATETHREAD)] = dispatcher;
thread_process_dispatcher_.reset(dispatcher);
dispatcher = new SyncDispatcher(policy_);
ipc_targets_[static_cast<size_t>(IpcTag::CREATEEVENT)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::OPENEVENT)] = dispatcher;
sync_dispatcher_.reset(dispatcher);
dispatcher = new RegistryDispatcher(policy_);
ipc_targets_[static_cast<size_t>(IpcTag::NTCREATEKEY)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::NTOPENKEY)] = dispatcher;
registry_dispatcher_.reset(dispatcher);
dispatcher = new HandleDispatcher(policy_);
ipc_targets_[static_cast<size_t>(IpcTag::DUPLICATEHANDLEPROXY)] = dispatcher;
handle_dispatcher_.reset(dispatcher);
dispatcher = new ProcessMitigationsWin32KDispatcher(policy_);
ipc_targets_[static_cast<size_t>(IpcTag::GDI_GDIDLLINITIALIZE)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::GDI_GETSTOCKOBJECT)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::USER_REGISTERCLASSW)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::USER_ENUMDISPLAYMONITORS)] =
dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::USER_ENUMDISPLAYDEVICES)] =
dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::USER_GETMONITORINFO)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::GDI_CREATEOPMPROTECTEDOUTPUTS)] =
dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::GDI_GETCERTIFICATE)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::GDI_GETCERTIFICATESIZE)] =
dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::GDI_DESTROYOPMPROTECTEDOUTPUT)] =
dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::GDI_CONFIGUREOPMPROTECTEDOUTPUT)] =
dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::GDI_GETOPMINFORMATION)] = dispatcher;
ipc_targets_[static_cast<size_t>(IpcTag::GDI_GETOPMRANDOMNUMBER)] =
dispatcher;
ipc_targets_[static_cast<size_t>(
IpcTag::GDI_GETSUGGESTEDOPMPROTECTEDOUTPUTARRAYSIZE)] = dispatcher;
ipc_targets_[static_cast<size_t>(
IpcTag::GDI_SETOPMSIGNINGKEYANDSEQUENCENUMBERS)] = dispatcher;
process_mitigations_win32k_dispatcher_.reset(dispatcher);
dispatcher = new SignedDispatcher(policy_);
ipc_targets_[static_cast<size_t>(IpcTag::NTCREATESECTION)] = dispatcher;
signed_dispatcher_.reset(dispatcher);
dispatcher = new LineBreakDispatcher(policy_);
ipc_targets_[static_cast<size_t>(IpcTag::GETCOMPLEXLINEBREAKS)] = dispatcher;
line_break_dispatcher_.reset(dispatcher);
}
TopLevelDispatcher::~TopLevelDispatcher() {}
// When an IPC is ready in any of the targets we get called. We manage an array
// of IPC dispatchers which are keyed on the IPC tag so we normally delegate
// to the appropriate dispatcher unless we can handle the IPC call ourselves.
Dispatcher* TopLevelDispatcher::OnMessageReady(IPCParams* ipc,
CallbackGeneric* callback) {
DCHECK(callback);
static const IPCParams ping1 = {IpcTag::PING1, {UINT32_TYPE}};
static const IPCParams ping2 = {IpcTag::PING2, {INOUTPTR_TYPE}};
if (ping1.Matches(ipc) || ping2.Matches(ipc)) {
*callback = reinterpret_cast<CallbackGeneric>(
static_cast<Callback1>(&TopLevelDispatcher::Ping));
return this;
}
Dispatcher* dispatcher = GetDispatcher(ipc->ipc_tag);
if (!dispatcher) {
NOTREACHED();
return nullptr;
}
return dispatcher->OnMessageReady(ipc, callback);
}
// Delegate to the appropriate dispatcher.
bool TopLevelDispatcher::SetupService(InterceptionManager* manager,
IpcTag service) {
if (IpcTag::PING1 == service || IpcTag::PING2 == service)
return true;
Dispatcher* dispatcher = GetDispatcher(service);
if (!dispatcher) {
NOTREACHED();
return false;
}
return dispatcher->SetupService(manager, service);
}
// We service PING message which is a way to test a round trip of the
// IPC subsystem. We receive a integer cookie and we are expected to return the
// cookie times two (or three) and the current tick count.
bool TopLevelDispatcher::Ping(IPCInfo* ipc, void* arg1) {
switch (ipc->ipc_tag) {
case IpcTag::PING1: {
IPCInt ipc_int(arg1);
uint32_t cookie = ipc_int.As32Bit();
ipc->return_info.extended_count = 2;
ipc->return_info.extended[0].unsigned_int = ::GetTickCount();
ipc->return_info.extended[1].unsigned_int = 2 * cookie;
return true;
}
case IpcTag::PING2: {
CountedBuffer* io_buffer = reinterpret_cast<CountedBuffer*>(arg1);
if (sizeof(uint32_t) != io_buffer->Size())
return false;
uint32_t* cookie = reinterpret_cast<uint32_t*>(io_buffer->Buffer());
*cookie = (*cookie) * 3;
return true;
}
default:
return false;
}
}
Dispatcher* TopLevelDispatcher::GetDispatcher(IpcTag ipc_tag) {
if (ipc_tag >= IpcTag::LAST || ipc_tag <= IpcTag::UNUSED)
return nullptr;
return ipc_targets_[static_cast<size_t>(ipc_tag)];
}
} // namespace sandbox
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