| // Copyright (c) 2006-2008 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/registry_interception.h" |
| |
| #include "sandbox/win/src/crosscall_client.h" |
| #include "sandbox/win/src/ipc_tags.h" |
| #include "sandbox/win/src/sandbox_factory.h" |
| #include "sandbox/win/src/sandbox_nt_util.h" |
| #include "sandbox/win/src/sharedmem_ipc_client.h" |
| #include "sandbox/win/src/target_services.h" |
| |
| namespace sandbox { |
| |
| NTSTATUS WINAPI TargetNtCreateKey(NtCreateKeyFunction orig_CreateKey, |
| PHANDLE key, ACCESS_MASK desired_access, |
| POBJECT_ATTRIBUTES object_attributes, |
| ULONG title_index, PUNICODE_STRING class_name, |
| ULONG create_options, PULONG disposition) { |
| // Check if the process can create it first. |
| NTSTATUS status = orig_CreateKey(key, desired_access, object_attributes, |
| title_index, class_name, create_options, |
| disposition); |
| if (NT_SUCCESS(status)) |
| return status; |
| |
| // We don't trust that the IPC can work this early. |
| if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) |
| return status; |
| |
| do { |
| if (!ValidParameter(key, sizeof(HANDLE), WRITE)) |
| break; |
| |
| if (disposition && !ValidParameter(disposition, sizeof(ULONG), WRITE)) |
| break; |
| |
| // At this point we don't support class_name. |
| if (class_name && class_name->Buffer && class_name->Length) |
| break; |
| |
| // We don't support creating link keys, volatile keys and backup/restore. |
| if (create_options) |
| break; |
| |
| void* memory = GetGlobalIPCMemory(); |
| if (NULL == memory) |
| break; |
| |
| wchar_t* name; |
| uint32 attributes = 0; |
| HANDLE root_directory = 0; |
| NTSTATUS ret = AllocAndCopyName(object_attributes, &name, &attributes, |
| &root_directory); |
| if (!NT_SUCCESS(ret) || NULL == name) |
| break; |
| |
| SharedMemIPCClient ipc(memory); |
| CrossCallReturn answer = {0}; |
| |
| ResultCode code = CrossCall(ipc, IPC_NTCREATEKEY_TAG, name, attributes, |
| root_directory, desired_access, title_index, |
| create_options, &answer); |
| |
| operator delete(name, NT_ALLOC); |
| |
| if (SBOX_ALL_OK != code) |
| break; |
| |
| if (!NT_SUCCESS(answer.nt_status)) |
| // TODO(nsylvain): We should return answer.nt_status here instead |
| // of status. We can do this only after we checked the policy. |
| // otherwise we will returns ACCESS_DENIED for all paths |
| // that are not specified by a policy, even though your token allows |
| // access to that path, and the original call had a more meaningful |
| // error. Bug 4369 |
| break; |
| |
| __try { |
| *key = answer.handle; |
| |
| if (disposition) |
| *disposition = answer.extended[0].unsigned_int; |
| |
| status = answer.nt_status; |
| } __except(EXCEPTION_EXECUTE_HANDLER) { |
| break; |
| } |
| } while (false); |
| |
| return status; |
| } |
| |
| NTSTATUS WINAPI CommonNtOpenKey(NTSTATUS status, PHANDLE key, |
| ACCESS_MASK desired_access, |
| POBJECT_ATTRIBUTES object_attributes) { |
| // We don't trust that the IPC can work this early. |
| if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) |
| return status; |
| |
| do { |
| if (!ValidParameter(key, sizeof(HANDLE), WRITE)) |
| break; |
| |
| void* memory = GetGlobalIPCMemory(); |
| if (NULL == memory) |
| break; |
| |
| wchar_t* name; |
| uint32 attributes; |
| HANDLE root_directory; |
| NTSTATUS ret = AllocAndCopyName(object_attributes, &name, &attributes, |
| &root_directory); |
| if (!NT_SUCCESS(ret) || NULL == name) |
| break; |
| |
| SharedMemIPCClient ipc(memory); |
| CrossCallReturn answer = {0}; |
| ResultCode code = CrossCall(ipc, IPC_NTOPENKEY_TAG, name, attributes, |
| root_directory, desired_access, &answer); |
| |
| operator delete(name, NT_ALLOC); |
| |
| if (SBOX_ALL_OK != code) |
| break; |
| |
| if (!NT_SUCCESS(answer.nt_status)) |
| // TODO(nsylvain): We should return answer.nt_status here instead |
| // of status. We can do this only after we checked the policy. |
| // otherwise we will returns ACCESS_DENIED for all paths |
| // that are not specified by a policy, even though your token allows |
| // access to that path, and the original call had a more meaningful |
| // error. Bug 4369 |
| break; |
| |
| __try { |
| *key = answer.handle; |
| status = answer.nt_status; |
| } __except(EXCEPTION_EXECUTE_HANDLER) { |
| break; |
| } |
| } while (false); |
| |
| return status; |
| } |
| |
| NTSTATUS WINAPI TargetNtOpenKey(NtOpenKeyFunction orig_OpenKey, PHANDLE key, |
| ACCESS_MASK desired_access, |
| POBJECT_ATTRIBUTES object_attributes) { |
| // Check if the process can open it first. |
| NTSTATUS status = orig_OpenKey(key, desired_access, object_attributes); |
| if (NT_SUCCESS(status)) |
| return status; |
| |
| return CommonNtOpenKey(status, key, desired_access, object_attributes); |
| } |
| |
| NTSTATUS WINAPI TargetNtOpenKeyEx(NtOpenKeyExFunction orig_OpenKeyEx, |
| PHANDLE key, ACCESS_MASK desired_access, |
| POBJECT_ATTRIBUTES object_attributes, |
| ULONG open_options) { |
| // Check if the process can open it first. |
| NTSTATUS status = orig_OpenKeyEx(key, desired_access, object_attributes, |
| open_options); |
| |
| // We do not support open_options at this time. The 2 current known values |
| // are REG_OPTION_CREATE_LINK, to open a symbolic link, and |
| // REG_OPTION_BACKUP_RESTORE to open the key with special privileges. |
| if (NT_SUCCESS(status) || open_options != 0) |
| return status; |
| |
| return CommonNtOpenKey(status, key, desired_access, object_attributes); |
| } |
| |
| } // namespace sandbox |