security/sandbox/win/src/handle_dispatcher.cc@6474c204b198 (annotated)
security/sandbox/win/src/handle_dispatcher.cc
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| michael@0 | 2 | // Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 3 | // found in the LICENSE file. |
| michael@0 | 4 | |
| michael@0 | 5 | #include "sandbox/win/src/handle_dispatcher.h" |
| michael@0 | 6 | |
| michael@0 | 7 | #include "base/win/scoped_handle.h" |
| michael@0 | 8 | #include "sandbox/win/src/handle_interception.h" |
| michael@0 | 9 | #include "sandbox/win/src/handle_policy.h" |
| michael@0 | 10 | #include "sandbox/win/src/ipc_tags.h" |
| michael@0 | 11 | #include "sandbox/win/src/policy_broker.h" |
| michael@0 | 12 | #include "sandbox/win/src/policy_params.h" |
| michael@0 | 13 | #include "sandbox/win/src/sandbox.h" |
| michael@0 | 14 | #include "sandbox/win/src/sandbox_nt_util.h" |
| michael@0 | 15 | #include "sandbox/win/src/sandbox_types.h" |
| michael@0 | 16 | #include "sandbox/win/src/sandbox_utils.h" |
| michael@0 | 17 | |
| michael@0 | 18 | namespace sandbox { |
| michael@0 | 19 | |
| michael@0 | 20 | HandleDispatcher::HandleDispatcher(PolicyBase* policy_base) |
| michael@0 | 21 | : policy_base_(policy_base) { |
| michael@0 | 22 | static const IPCCall duplicate_handle_proxy = { |
| michael@0 | 23 | {IPC_DUPLICATEHANDLEPROXY_TAG, VOIDPTR_TYPE, ULONG_TYPE, ULONG_TYPE, |
| michael@0 | 24 | ULONG_TYPE}, |
| michael@0 | 25 | reinterpret_cast<CallbackGeneric>(&HandleDispatcher::DuplicateHandleProxy) |
| michael@0 | 26 | }; |
| michael@0 | 27 | |
| michael@0 | 28 | ipc_calls_.push_back(duplicate_handle_proxy); |
| michael@0 | 29 | } |
| michael@0 | 30 | |
| michael@0 | 31 | bool HandleDispatcher::SetupService(InterceptionManager* manager, |
| michael@0 | 32 | int service) { |
| michael@0 | 33 | // We perform no interceptions for handles right now. |
| michael@0 | 34 | switch (service) { |
| michael@0 | 35 | case IPC_DUPLICATEHANDLEPROXY_TAG: |
| michael@0 | 36 | return true; |
| michael@0 | 37 | } |
| michael@0 | 38 | |
| michael@0 | 39 | return false; |
| michael@0 | 40 | } |
| michael@0 | 41 | |
| michael@0 | 42 | bool HandleDispatcher::DuplicateHandleProxy(IPCInfo* ipc, |
| michael@0 | 43 | HANDLE source_handle, |
| michael@0 | 44 | DWORD target_process_id, |
| michael@0 | 45 | DWORD desired_access, |
| michael@0 | 46 | DWORD options) { |
| michael@0 | 47 | NTSTATUS error; |
| michael@0 | 48 | static NtQueryObject QueryObject = NULL; |
| michael@0 | 49 | if (!QueryObject) |
| michael@0 | 50 | ResolveNTFunctionPtr("NtQueryObject", &QueryObject); |
| michael@0 | 51 | |
| michael@0 | 52 | // Get a copy of the handle for use in the broker process. |
| michael@0 | 53 | HANDLE handle_temp; |
| michael@0 | 54 | if (!::DuplicateHandle(ipc->client_info->process, source_handle, |
| michael@0 | 55 | ::GetCurrentProcess(), &handle_temp, |
| michael@0 | 56 | 0, FALSE, DUPLICATE_SAME_ACCESS)) { |
| michael@0 | 57 | ipc->return_info.win32_result = ::GetLastError(); |
| michael@0 | 58 | return false; |
| michael@0 | 59 | } |
| michael@0 | 60 | base::win::ScopedHandle handle(handle_temp); |
| michael@0 | 61 | |
| michael@0 | 62 | // Get the object type (32 characters is safe; current max is 14). |
| michael@0 | 63 | BYTE buffer[sizeof(OBJECT_TYPE_INFORMATION) + 32 * sizeof(wchar_t)]; |
| michael@0 | 64 | OBJECT_TYPE_INFORMATION* type_info = |
| michael@0 | 65 | reinterpret_cast<OBJECT_TYPE_INFORMATION*>(buffer); |
| michael@0 | 66 | ULONG size = sizeof(buffer) - sizeof(wchar_t); |
| michael@0 | 67 | error = QueryObject(handle, ObjectTypeInformation, type_info, size, &size); |
| michael@0 | 68 | if (!NT_SUCCESS(error)) { |
| michael@0 | 69 | ipc->return_info.win32_result = error; |
| michael@0 | 70 | return false; |
| michael@0 | 71 | } |
| michael@0 | 72 | type_info->Name.Buffer[type_info->Name.Length / sizeof(wchar_t)] = L'\0'; |
| michael@0 | 73 | |
| michael@0 | 74 | CountedParameterSet<HandleTarget> params; |
| michael@0 | 75 | params[HandleTarget::NAME] = ParamPickerMake(type_info->Name.Buffer); |
| michael@0 | 76 | params[HandleTarget::TARGET] = ParamPickerMake(target_process_id); |
| michael@0 | 77 | |
| michael@0 | 78 | EvalResult eval = policy_base_->EvalPolicy(IPC_DUPLICATEHANDLEPROXY_TAG, |
| michael@0 | 79 | params.GetBase()); |
| michael@0 | 80 | ipc->return_info.win32_result = |
| michael@0 | 81 | HandlePolicy::DuplicateHandleProxyAction(eval, *ipc->client_info, |
| michael@0 | 82 | source_handle, |
| michael@0 | 83 | target_process_id, |
| michael@0 | 84 | &ipc->return_info.handle, |
| michael@0 | 85 | desired_access, options); |
| michael@0 | 86 | return true; |
| michael@0 | 87 | } |
| michael@0 | 88 | |
| michael@0 | 89 | } // namespace sandbox |
| michael@0 | 90 |
