diff options
Diffstat (limited to 'security/sandbox/chromium/sandbox/win/src/policy_broker.cc')
-rw-r--r-- | security/sandbox/chromium/sandbox/win/src/policy_broker.cc | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/security/sandbox/chromium/sandbox/win/src/policy_broker.cc b/security/sandbox/chromium/sandbox/win/src/policy_broker.cc new file mode 100644 index 0000000000..406057acbb --- /dev/null +++ b/security/sandbox/chromium/sandbox/win/src/policy_broker.cc @@ -0,0 +1,123 @@ +// Copyright (c) 2012 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/policy_broker.h" + +#include <stddef.h> + +#include <map> + +#include "base/logging.h" +#include "base/win/pe_image.h" +#include "base/win/windows_version.h" +#include "sandbox/win/src/interception.h" +#include "sandbox/win/src/interceptors.h" +#include "sandbox/win/src/policy_target.h" +#include "sandbox/win/src/process_thread_interception.h" +#include "sandbox/win/src/sandbox.h" +#include "sandbox/win/src/sandbox_nt_types.h" +#include "sandbox/win/src/sandbox_types.h" +#include "sandbox/win/src/target_process.h" + +// This code executes on the broker side, as a callback from the policy on the +// target side (the child). + +namespace sandbox { + +// This is the list of all imported symbols from ntdll.dll. +SANDBOX_INTERCEPT NtExports g_nt; + +#define INIT_GLOBAL_NT(member) \ + g_nt.member = reinterpret_cast<Nt##member##Function>( \ + ntdll_image.GetProcAddress("Nt" #member)); \ + if (!g_nt.member) \ + return false + +#define INIT_GLOBAL_RTL(member) \ + g_nt.member = \ + reinterpret_cast<member##Function>(ntdll_image.GetProcAddress(#member)); \ + if (!g_nt.member) \ + return false + +bool InitGlobalNt() { + HMODULE ntdll = ::GetModuleHandle(kNtdllName); + base::win::PEImage ntdll_image(ntdll); + + INIT_GLOBAL_NT(AllocateVirtualMemory); + INIT_GLOBAL_NT(Close); + INIT_GLOBAL_NT(DuplicateObject); + INIT_GLOBAL_NT(FreeVirtualMemory); + INIT_GLOBAL_NT(MapViewOfSection); + INIT_GLOBAL_NT(ProtectVirtualMemory); + INIT_GLOBAL_NT(QueryInformationProcess); + INIT_GLOBAL_NT(QueryObject); + INIT_GLOBAL_NT(QuerySection); + INIT_GLOBAL_NT(QueryVirtualMemory); + INIT_GLOBAL_NT(UnmapViewOfSection); + INIT_GLOBAL_NT(SignalAndWaitForSingleObject); + INIT_GLOBAL_NT(WaitForSingleObject); + + INIT_GLOBAL_RTL(RtlAllocateHeap); + INIT_GLOBAL_RTL(RtlAnsiStringToUnicodeString); + INIT_GLOBAL_RTL(RtlCompareUnicodeString); + INIT_GLOBAL_RTL(RtlCreateHeap); + INIT_GLOBAL_RTL(RtlCreateUserThread); + INIT_GLOBAL_RTL(RtlDestroyHeap); + INIT_GLOBAL_RTL(RtlFreeHeap); + INIT_GLOBAL_RTL(_strnicmp); + INIT_GLOBAL_RTL(strlen); + INIT_GLOBAL_RTL(wcslen); + INIT_GLOBAL_RTL(memcpy); + + return true; +} + +bool SetupNtdllImports(TargetProcess* child) { + if (!InitGlobalNt()) { + return false; + } + +#ifndef NDEBUG + // Verify that the structure is fully initialized. + for (size_t i = 0; i < sizeof(g_nt) / sizeof(void*); i++) + DCHECK(reinterpret_cast<char**>(&g_nt)[i]); +#endif + return (SBOX_ALL_OK == child->TransferVariable("g_nt", &g_nt, sizeof(g_nt))); +} + +#undef INIT_GLOBAL_NT +#undef INIT_GLOBAL_RTL + +bool SetupBasicInterceptions(InterceptionManager* manager, + bool is_csrss_connected) { + // Interceptions provided by process_thread_policy, without actual policy. + if (!INTERCEPT_NT(manager, NtOpenThread, OPEN_THREAD_ID, 20) || + !INTERCEPT_NT(manager, NtOpenProcess, OPEN_PROCESS_ID, 20) || + !INTERCEPT_NT(manager, NtOpenProcessToken, OPEN_PROCESS_TOKEN_ID, 16)) + return false; + + // Interceptions with neither policy nor IPC. + if (!INTERCEPT_NT(manager, NtSetInformationThread, SET_INFORMATION_THREAD_ID, + 20) || + !INTERCEPT_NT(manager, NtOpenThreadToken, OPEN_THREAD_TOKEN_ID, 20)) + return false; + + // This one is also provided by process_thread_policy. + if (!INTERCEPT_NT(manager, NtOpenProcessTokenEx, OPEN_PROCESS_TOKEN_EX_ID, + 20)) + return false; + + if (!INTERCEPT_NT(manager, NtOpenThreadTokenEx, OPEN_THREAD_TOKEN_EX_ID, 24)) + return false; + + if (!is_csrss_connected) { + if (!INTERCEPT_EAT(manager, kKerneldllName, CreateThread, CREATE_THREAD_ID, + 28)) + return false; + } + + return true; +} + +} // namespace sandbox |