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comparison: security/sandbox/win/src/policy_broker.cc
security/sandbox/win/src/policy_broker.cc
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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 #include <map> | |
| 6 | |
| 7 #include "sandbox/win/src/policy_broker.h" | |
| 8 | |
| 9 #include "base/logging.h" | |
| 10 #include "base/win/pe_image.h" | |
| 11 #include "base/win/windows_version.h" | |
| 12 #include "sandbox/win/src/interception.h" | |
| 13 #include "sandbox/win/src/interceptors.h" | |
| 14 #include "sandbox/win/src/policy_target.h" | |
| 15 #include "sandbox/win/src/process_thread_interception.h" | |
| 16 #include "sandbox/win/src/sandbox.h" | |
| 17 #include "sandbox/win/src/sandbox_nt_types.h" | |
| 18 #include "sandbox/win/src/sandbox_types.h" | |
| 19 #include "sandbox/win/src/target_process.h" | |
| 20 | |
| 21 // This code executes on the broker side, as a callback from the policy on the | |
| 22 // target side (the child). | |
| 23 | |
| 24 namespace sandbox { | |
| 25 | |
| 26 // This is the list of all imported symbols from ntdll.dll. | |
| 27 SANDBOX_INTERCEPT NtExports g_nt; | |
| 28 | |
| 29 #define INIT_GLOBAL_NT(member) \ | |
| 30 g_nt.member = reinterpret_cast<Nt##member##Function>( \ | |
| 31 ntdll_image.GetProcAddress("Nt" #member)); \ | |
| 32 if (NULL == g_nt.member) \ | |
| 33 return false | |
| 34 | |
| 35 #define INIT_GLOBAL_RTL(member) \ | |
| 36 g_nt.member = reinterpret_cast<member##Function>( \ | |
| 37 ntdll_image.GetProcAddress(#member)); \ | |
| 38 if (NULL == g_nt.member) \ | |
| 39 return false | |
| 40 | |
| 41 bool SetupNtdllImports(TargetProcess *child) { | |
| 42 HMODULE ntdll = ::GetModuleHandle(kNtdllName); | |
| 43 base::win::PEImage ntdll_image(ntdll); | |
| 44 | |
| 45 // Bypass purify's interception. | |
| 46 wchar_t* loader_get = reinterpret_cast<wchar_t*>( | |
| 47 ntdll_image.GetProcAddress("LdrGetDllHandle")); | |
| 48 if (loader_get) { | |
| 49 GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | | |
| 50 GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, | |
| 51 loader_get, &ntdll); | |
| 52 } | |
| 53 | |
| 54 INIT_GLOBAL_NT(AllocateVirtualMemory); | |
| 55 INIT_GLOBAL_NT(Close); | |
| 56 INIT_GLOBAL_NT(DuplicateObject); | |
| 57 INIT_GLOBAL_NT(FreeVirtualMemory); | |
| 58 INIT_GLOBAL_NT(MapViewOfSection); | |
| 59 INIT_GLOBAL_NT(ProtectVirtualMemory); | |
| 60 INIT_GLOBAL_NT(QueryInformationProcess); | |
| 61 INIT_GLOBAL_NT(QueryObject); | |
| 62 INIT_GLOBAL_NT(QuerySection); | |
| 63 INIT_GLOBAL_NT(QueryVirtualMemory); | |
| 64 INIT_GLOBAL_NT(UnmapViewOfSection); | |
| 65 | |
| 66 INIT_GLOBAL_RTL(RtlAllocateHeap); | |
| 67 INIT_GLOBAL_RTL(RtlAnsiStringToUnicodeString); | |
| 68 INIT_GLOBAL_RTL(RtlCompareUnicodeString); | |
| 69 INIT_GLOBAL_RTL(RtlCreateHeap); | |
| 70 INIT_GLOBAL_RTL(RtlCreateUserThread); | |
| 71 INIT_GLOBAL_RTL(RtlDestroyHeap); | |
| 72 INIT_GLOBAL_RTL(RtlFreeHeap); | |
| 73 INIT_GLOBAL_RTL(_strnicmp); | |
| 74 INIT_GLOBAL_RTL(strlen); | |
| 75 INIT_GLOBAL_RTL(wcslen); | |
| 76 | |
| 77 #ifndef NDEBUG | |
| 78 // Verify that the structure is fully initialized. | |
| 79 for (size_t i = 0; i < sizeof(g_nt)/sizeof(void*); i++) | |
| 80 DCHECK(reinterpret_cast<char**>(&g_nt)[i]); | |
| 81 #endif | |
| 82 return (SBOX_ALL_OK == child->TransferVariable("g_nt", &g_nt, sizeof(g_nt))); | |
| 83 } | |
| 84 | |
| 85 #undef INIT_GLOBAL_NT | |
| 86 #undef INIT_GLOBAL_RTL | |
| 87 | |
| 88 bool SetupBasicInterceptions(InterceptionManager* manager) { | |
| 89 // Interceptions provided by process_thread_policy, without actual policy. | |
| 90 if (!INTERCEPT_NT(manager, NtOpenThread, OPEN_TREAD_ID, 20) || | |
| 91 !INTERCEPT_NT(manager, NtOpenProcess, OPEN_PROCESS_ID, 20) || | |
| 92 !INTERCEPT_NT(manager, NtOpenProcessToken, OPEN_PROCESS_TOKEN_ID, 16)) | |
| 93 return false; | |
| 94 | |
| 95 // Interceptions with neither policy nor IPC. | |
| 96 if (!INTERCEPT_NT(manager, NtSetInformationThread, SET_INFORMATION_THREAD_ID, | |
| 97 20) || | |
| 98 !INTERCEPT_NT(manager, NtOpenThreadToken, OPEN_THREAD_TOKEN_ID, 20)) | |
| 99 return false; | |
| 100 | |
| 101 if (base::win::GetVersion() >= base::win::VERSION_XP) { | |
| 102 // Bug 27218: We don't have dispatch for some x64 syscalls. | |
| 103 // This one is also provided by process_thread_policy. | |
| 104 if (!INTERCEPT_NT(manager, NtOpenProcessTokenEx, OPEN_PROCESS_TOKEN_EX_ID, | |
| 105 20)) | |
| 106 return false; | |
| 107 | |
| 108 return INTERCEPT_NT(manager, NtOpenThreadTokenEx, OPEN_THREAD_TOKEN_EX_ID, | |
| 109 24); | |
| 110 } | |
| 111 | |
| 112 return true; | |
| 113 } | |
| 114 | |
| 115 } // namespace sandbox |
