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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef SANDBOX_SRC_HANDLE_CLOSER_H_ | |
6 #define SANDBOX_SRC_HANDLE_CLOSER_H_ | |
7 | |
8 #include <stddef.h> | |
9 | |
10 #include <map> | |
11 #include <set> | |
12 | |
13 #include "base/macros.h" | |
14 #include "base/strings/string16.h" | |
15 #include "sandbox/win/src/interception.h" | |
16 #include "sandbox/win/src/sandbox_types.h" | |
17 #include "sandbox/win/src/target_process.h" | |
18 | |
19 namespace sandbox { | |
20 | |
21 // This is a map of handle-types to names that we need to close in the | |
22 // target process. A null set means we need to close all handles of the | |
23 // given type. | |
24 typedef std::map<const base::string16, std::set<base::string16> > HandleMap; | |
25 | |
26 // Type and set of corresponding handle names to close. | |
27 struct HandleListEntry { | |
28 size_t record_bytes; // Rounded to sizeof(size_t) bytes. | |
29 size_t offset_to_names; // Nul terminated strings of name_count names. | |
30 size_t name_count; | |
31 base::char16 handle_type[1]; | |
32 }; | |
33 | |
34 // Global parameters and a pointer to the list of entries. | |
35 struct HandleCloserInfo { | |
36 size_t record_bytes; // Rounded to sizeof(size_t) bytes. | |
37 size_t num_handle_types; | |
38 struct HandleListEntry handle_entries[1]; | |
39 }; | |
40 | |
41 SANDBOX_INTERCEPT HandleCloserInfo* g_handle_closer_info; | |
42 | |
43 // Adds handles to close after lockdown. | |
44 class HandleCloser { | |
45 public: | |
46 HandleCloser(); | |
47 ~HandleCloser(); | |
48 | |
49 // Adds a handle that will be closed in the target process after lockdown. | |
50 // A NULL value for handle_name indicates all handles of the specified type. | |
51 // An empty string for handle_name indicates the handle is unnamed. | |
52 ResultCode AddHandle(const base::char16* handle_type, | |
53 const base::char16* handle_name); | |
54 | |
55 // Serializes and copies the closer table into the target process. | |
56 bool InitializeTargetHandles(TargetProcess* target); | |
57 | |
58 private: | |
59 // Calculates the memory needed to copy the serialized handles list (rounded | |
60 // to the nearest machine-word size). | |
61 size_t GetBufferSize(); | |
62 | |
63 // Serializes the handle list into the target process. | |
64 bool SetupHandleList(void* buffer, size_t buffer_bytes); | |
65 | |
66 HandleMap handles_to_close_; | |
67 | |
68 DISALLOW_COPY_AND_ASSIGN(HandleCloser); | |
69 }; | |
70 | |
71 // Returns the object manager's name associated with a handle | |
72 bool GetHandleName(HANDLE handle, base::string16* handle_name); | |
73 | |
74 } // namespace sandbox | |
75 | |
76 #endif // SANDBOX_SRC_HANDLE_CLOSER_H_ | |
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