michael@0: // Copyright (c) 2006-2010 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: #include "sandbox/win/src/filesystem_dispatcher.h"
michael@0: 
michael@0: #include "sandbox/win/src/crosscall_client.h"
michael@0: #include "sandbox/win/src/filesystem_interception.h"
michael@0: #include "sandbox/win/src/filesystem_policy.h"
michael@0: #include "sandbox/win/src/interception.h"
michael@0: #include "sandbox/win/src/interceptors.h"
michael@0: #include "sandbox/win/src/ipc_tags.h"
michael@0: #include "sandbox/win/src/policy_broker.h"
michael@0: #include "sandbox/win/src/policy_params.h"
michael@0: #include "sandbox/win/src/sandbox.h"
michael@0: #include "sandbox/win/src/sandbox_nt_util.h"
michael@0: 
michael@0: namespace sandbox {
michael@0: 
michael@0: FilesystemDispatcher::FilesystemDispatcher(PolicyBase* policy_base)
michael@0:     : policy_base_(policy_base) {
michael@0:   static const IPCCall create_params = {
michael@0:     {IPC_NTCREATEFILE_TAG, WCHAR_TYPE, ULONG_TYPE, ULONG_TYPE, ULONG_TYPE,
michael@0:      ULONG_TYPE, ULONG_TYPE, ULONG_TYPE},
michael@0:     reinterpret_cast<CallbackGeneric>(&FilesystemDispatcher::NtCreateFile)
michael@0:   };
michael@0: 
michael@0:   static const IPCCall open_file = {
michael@0:     {IPC_NTOPENFILE_TAG, WCHAR_TYPE, ULONG_TYPE, ULONG_TYPE, ULONG_TYPE,
michael@0:      ULONG_TYPE},
michael@0:     reinterpret_cast<CallbackGeneric>(&FilesystemDispatcher::NtOpenFile)
michael@0:   };
michael@0: 
michael@0:   static const IPCCall attribs = {
michael@0:     {IPC_NTQUERYATTRIBUTESFILE_TAG, WCHAR_TYPE, ULONG_TYPE, INOUTPTR_TYPE},
michael@0:     reinterpret_cast<CallbackGeneric>(
michael@0:         &FilesystemDispatcher::NtQueryAttributesFile)
michael@0:   };
michael@0: 
michael@0:   static const IPCCall full_attribs = {
michael@0:     {IPC_NTQUERYFULLATTRIBUTESFILE_TAG, WCHAR_TYPE, ULONG_TYPE, INOUTPTR_TYPE},
michael@0:     reinterpret_cast<CallbackGeneric>(
michael@0:           &FilesystemDispatcher::NtQueryFullAttributesFile)
michael@0:   };
michael@0: 
michael@0:   static const IPCCall set_info = {
michael@0:     {IPC_NTSETINFO_RENAME_TAG, VOIDPTR_TYPE, INOUTPTR_TYPE, INOUTPTR_TYPE,
michael@0:      ULONG_TYPE, ULONG_TYPE},
michael@0:     reinterpret_cast<CallbackGeneric>(
michael@0:         &FilesystemDispatcher::NtSetInformationFile)
michael@0:   };
michael@0: 
michael@0:   ipc_calls_.push_back(create_params);
michael@0:   ipc_calls_.push_back(open_file);
michael@0:   ipc_calls_.push_back(attribs);
michael@0:   ipc_calls_.push_back(full_attribs);
michael@0:   ipc_calls_.push_back(set_info);
michael@0: }
michael@0: 
michael@0: bool FilesystemDispatcher::SetupService(InterceptionManager* manager,
michael@0:                                         int service) {
michael@0:   switch (service) {
michael@0:     case IPC_NTCREATEFILE_TAG:
michael@0:       return INTERCEPT_NT(manager, NtCreateFile, CREATE_FILE_ID, 48);
michael@0: 
michael@0:     case IPC_NTOPENFILE_TAG:
michael@0:       return INTERCEPT_NT(manager, NtOpenFile, OPEN_FILE_ID, 28);
michael@0: 
michael@0:     case IPC_NTQUERYATTRIBUTESFILE_TAG:
michael@0:       return INTERCEPT_NT(manager, NtQueryAttributesFile, QUERY_ATTRIB_FILE_ID,
michael@0:                           12);
michael@0: 
michael@0:     case IPC_NTQUERYFULLATTRIBUTESFILE_TAG:
michael@0:         return INTERCEPT_NT(manager, NtQueryFullAttributesFile,
michael@0:                             QUERY_FULL_ATTRIB_FILE_ID, 12);
michael@0: 
michael@0:     case IPC_NTSETINFO_RENAME_TAG:
michael@0:       return INTERCEPT_NT(manager, NtSetInformationFile, SET_INFO_FILE_ID, 24);
michael@0: 
michael@0:     default:
michael@0:       return false;
michael@0:   }
michael@0: }
michael@0: 
michael@0: bool FilesystemDispatcher::NtCreateFile(
michael@0:     IPCInfo* ipc, std::wstring* name, DWORD attributes, DWORD desired_access,
michael@0:     DWORD file_attributes, DWORD share_access, DWORD create_disposition,
michael@0:     DWORD create_options) {
michael@0:   if (!PreProcessName(*name, name)) {
michael@0:     // The path requested might contain a reparse point.
michael@0:     ipc->return_info.nt_status = STATUS_ACCESS_DENIED;
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0:   const wchar_t* filename = name->c_str();
michael@0: 
michael@0:   ULONG broker = TRUE;
michael@0:   CountedParameterSet<OpenFile> params;
michael@0:   params[OpenFile::NAME] = ParamPickerMake(filename);
michael@0:   params[OpenFile::ACCESS] = ParamPickerMake(desired_access);
michael@0:   params[OpenFile::OPTIONS] = ParamPickerMake(create_options);
michael@0:   params[OpenFile::BROKER] = ParamPickerMake(broker);
michael@0: 
michael@0:   // To evaluate the policy we need to call back to the policy object. We
michael@0:   // are just middlemen in the operation since is the FileSystemPolicy which
michael@0:   // knows what to do.
michael@0:   EvalResult result = policy_base_->EvalPolicy(IPC_NTCREATEFILE_TAG,
michael@0:                                                params.GetBase());
michael@0:   HANDLE handle;
michael@0:   ULONG_PTR io_information = 0;
michael@0:   NTSTATUS nt_status;
michael@0:   if (!FileSystemPolicy::CreateFileAction(result, *ipc->client_info, *name,
michael@0:                                           attributes, desired_access,
michael@0:                                           file_attributes, share_access,
michael@0:                                           create_disposition, create_options,
michael@0:                                           &handle, &nt_status,
michael@0:                                           &io_information)) {
michael@0:     ipc->return_info.nt_status = STATUS_ACCESS_DENIED;
michael@0:     return true;
michael@0:   }
michael@0:   // Return operation status on the IPC.
michael@0:   ipc->return_info.extended[0].ulong_ptr = io_information;
michael@0:   ipc->return_info.nt_status = nt_status;
michael@0:   ipc->return_info.handle = handle;
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: bool FilesystemDispatcher::NtOpenFile(
michael@0:     IPCInfo* ipc, std::wstring* name, DWORD attributes, DWORD desired_access,
michael@0:     DWORD share_access, DWORD open_options) {
michael@0:   if (!PreProcessName(*name, name)) {
michael@0:     // The path requested might contain a reparse point.
michael@0:     ipc->return_info.nt_status = STATUS_ACCESS_DENIED;
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0:   const wchar_t* filename = name->c_str();
michael@0: 
michael@0:   ULONG broker = TRUE;
michael@0:   CountedParameterSet<OpenFile> params;
michael@0:   params[OpenFile::NAME] = ParamPickerMake(filename);
michael@0:   params[OpenFile::ACCESS] = ParamPickerMake(desired_access);
michael@0:   params[OpenFile::OPTIONS] = ParamPickerMake(open_options);
michael@0:   params[OpenFile::BROKER] = ParamPickerMake(broker);
michael@0: 
michael@0:   // To evaluate the policy we need to call back to the policy object. We
michael@0:   // are just middlemen in the operation since is the FileSystemPolicy which
michael@0:   // knows what to do.
michael@0:   EvalResult result = policy_base_->EvalPolicy(IPC_NTOPENFILE_TAG,
michael@0:                                                params.GetBase());
michael@0:   HANDLE handle;
michael@0:   ULONG_PTR io_information = 0;
michael@0:   NTSTATUS nt_status;
michael@0:   if (!FileSystemPolicy::OpenFileAction(result, *ipc->client_info, *name,
michael@0:                                         attributes, desired_access,
michael@0:                                         share_access, open_options, &handle,
michael@0:                                         &nt_status, &io_information)) {
michael@0:     ipc->return_info.nt_status = STATUS_ACCESS_DENIED;
michael@0:     return true;
michael@0:   }
michael@0:   // Return operation status on the IPC.
michael@0:   ipc->return_info.extended[0].ulong_ptr = io_information;
michael@0:   ipc->return_info.nt_status = nt_status;
michael@0:   ipc->return_info.handle = handle;
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: bool FilesystemDispatcher::NtQueryAttributesFile(
michael@0:     IPCInfo* ipc, std::wstring* name, DWORD attributes, CountedBuffer* info) {
michael@0:   if (sizeof(FILE_BASIC_INFORMATION) != info->Size())
michael@0:     return false;
michael@0: 
michael@0:   if (!PreProcessName(*name, name)) {
michael@0:     // The path requested might contain a reparse point.
michael@0:     ipc->return_info.nt_status = STATUS_ACCESS_DENIED;
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0:   ULONG broker = TRUE;
michael@0:   const wchar_t* filename = name->c_str();
michael@0:   CountedParameterSet<FileName> params;
michael@0:   params[FileName::NAME] = ParamPickerMake(filename);
michael@0:   params[FileName::BROKER] = ParamPickerMake(broker);
michael@0: 
michael@0:   // To evaluate the policy we need to call back to the policy object. We
michael@0:   // are just middlemen in the operation since is the FileSystemPolicy which
michael@0:   // knows what to do.
michael@0:   EvalResult result = policy_base_->EvalPolicy(IPC_NTQUERYATTRIBUTESFILE_TAG,
michael@0:                                                params.GetBase());
michael@0: 
michael@0:   FILE_BASIC_INFORMATION* information =
michael@0:         reinterpret_cast<FILE_BASIC_INFORMATION*>(info->Buffer());
michael@0:   NTSTATUS nt_status;
michael@0:   if (!FileSystemPolicy::QueryAttributesFileAction(result, *ipc->client_info,
michael@0:                                                    *name, attributes,
michael@0:                                                    information, &nt_status)) {
michael@0:     ipc->return_info.nt_status = STATUS_ACCESS_DENIED;
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0:   // Return operation status on the IPC.
michael@0:   ipc->return_info.nt_status = nt_status;
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: bool FilesystemDispatcher::NtQueryFullAttributesFile(
michael@0:     IPCInfo* ipc, std::wstring* name, DWORD attributes, CountedBuffer* info) {
michael@0:   if (sizeof(FILE_NETWORK_OPEN_INFORMATION) != info->Size())
michael@0:     return false;
michael@0: 
michael@0:   if (!PreProcessName(*name, name)) {
michael@0:     // The path requested might contain a reparse point.
michael@0:     ipc->return_info.nt_status = STATUS_ACCESS_DENIED;
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0:   ULONG broker = TRUE;
michael@0:   const wchar_t* filename = name->c_str();
michael@0:   CountedParameterSet<FileName> params;
michael@0:   params[FileName::NAME] = ParamPickerMake(filename);
michael@0:   params[FileName::BROKER] = ParamPickerMake(broker);
michael@0: 
michael@0:   // To evaluate the policy we need to call back to the policy object. We
michael@0:   // are just middlemen in the operation since is the FileSystemPolicy which
michael@0:   // knows what to do.
michael@0:   EvalResult result = policy_base_->EvalPolicy(
michael@0:                           IPC_NTQUERYFULLATTRIBUTESFILE_TAG, params.GetBase());
michael@0: 
michael@0:   FILE_NETWORK_OPEN_INFORMATION* information =
michael@0:         reinterpret_cast<FILE_NETWORK_OPEN_INFORMATION*>(info->Buffer());
michael@0:   NTSTATUS nt_status;
michael@0:   if (!FileSystemPolicy::QueryFullAttributesFileAction(result,
michael@0:                                                        *ipc->client_info,
michael@0:                                                        *name, attributes,
michael@0:                                                        information,
michael@0:                                                        &nt_status)) {
michael@0:     ipc->return_info.nt_status = STATUS_ACCESS_DENIED;
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0:   // Return operation status on the IPC.
michael@0:   ipc->return_info.nt_status = nt_status;
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: bool FilesystemDispatcher::NtSetInformationFile(
michael@0:     IPCInfo* ipc, HANDLE handle, CountedBuffer* status, CountedBuffer* info,
michael@0:     DWORD length, DWORD info_class) {
michael@0:   if (sizeof(IO_STATUS_BLOCK) != status->Size())
michael@0:     return false;
michael@0:   if (length != info->Size())
michael@0:     return false;
michael@0: 
michael@0:   FILE_RENAME_INFORMATION* rename_info =
michael@0:       reinterpret_cast<FILE_RENAME_INFORMATION*>(info->Buffer());
michael@0: 
michael@0:   if (!IsSupportedRenameCall(rename_info, length, info_class))
michael@0:     return false;
michael@0: 
michael@0:   std::wstring name;
michael@0:   name.assign(rename_info->FileName, rename_info->FileNameLength /
michael@0:                                      sizeof(rename_info->FileName[0]));
michael@0:   if (!PreProcessName(name, &name)) {
michael@0:     // The path requested might contain a reparse point.
michael@0:     ipc->return_info.nt_status = STATUS_ACCESS_DENIED;
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0:   ULONG broker = TRUE;
michael@0:   const wchar_t* filename = name.c_str();
michael@0:   CountedParameterSet<FileName> params;
michael@0:   params[FileName::NAME] = ParamPickerMake(filename);
michael@0:   params[FileName::BROKER] = ParamPickerMake(broker);
michael@0: 
michael@0:   // To evaluate the policy we need to call back to the policy object. We
michael@0:   // are just middlemen in the operation since is the FileSystemPolicy which
michael@0:   // knows what to do.
michael@0:   EvalResult result = policy_base_->EvalPolicy(IPC_NTSETINFO_RENAME_TAG,
michael@0:                                                params.GetBase());
michael@0: 
michael@0:   IO_STATUS_BLOCK* io_status =
michael@0:         reinterpret_cast<IO_STATUS_BLOCK*>(status->Buffer());
michael@0:   NTSTATUS nt_status;
michael@0:   if (!FileSystemPolicy::SetInformationFileAction(result, *ipc->client_info,
michael@0:                                                   handle, rename_info, length,
michael@0:                                                   info_class, io_status,
michael@0:                                                   &nt_status)) {
michael@0:     ipc->return_info.nt_status = STATUS_ACCESS_DENIED;
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0:   // Return operation status on the IPC.
michael@0:   ipc->return_info.nt_status = nt_status;
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: }  // namespace sandbox