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// 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/target_interceptions.h"
#include "sandbox/win/src/interception_agent.h"
#include "sandbox/win/src/sandbox_factory.h"
#include "sandbox/win/src/sandbox_nt_util.h"
#include "sandbox/win/src/target_services.h"
namespace sandbox {
SANDBOX_INTERCEPT NtExports g_nt;
// Hooks NtMapViewOfSection to detect the load of DLLs. If hot patching is
// required for this dll, this functions patches it.
NTSTATUS WINAPI TargetNtMapViewOfSection(
NtMapViewOfSectionFunction orig_MapViewOfSection, HANDLE section,
HANDLE process, PVOID *base, ULONG_PTR zero_bits, SIZE_T commit_size,
PLARGE_INTEGER offset, PSIZE_T view_size, SECTION_INHERIT inherit,
ULONG allocation_type, ULONG protect) {
NTSTATUS ret = orig_MapViewOfSection(section, process, base, zero_bits,
commit_size, offset, view_size, inherit,
allocation_type, protect);
static int s_load_count = 0;
if (1 == s_load_count) {
SandboxFactory::GetTargetServices()->GetState()->SetKernel32Loaded();
s_load_count = 2;
}
do {
if (!NT_SUCCESS(ret))
break;
if (!InitHeap())
break;
if (!IsSameProcess(process))
break;
if (!IsValidImageSection(section, base, offset, view_size))
break;
UINT image_flags;
UNICODE_STRING* module_name =
GetImageInfoFromModule(reinterpret_cast<HMODULE>(*base), &image_flags);
UNICODE_STRING* file_name = GetBackingFilePath(*base);
if ((!module_name) && (image_flags & MODULE_HAS_CODE)) {
// If the module has no exports we retrieve the module name from the
// full path of the mapped section.
module_name = ExtractModuleName(file_name);
}
InterceptionAgent* agent = InterceptionAgent::GetInterceptionAgent();
if (agent) {
if (!agent->OnDllLoad(file_name, module_name, *base)) {
// Interception agent is demanding to un-map the module.
g_nt.UnmapViewOfSection(process, *base);
ret = STATUS_UNSUCCESSFUL;
}
}
if (module_name)
operator delete(module_name, NT_ALLOC);
if (file_name)
operator delete(file_name, NT_ALLOC);
} while (false);
if (!s_load_count)
s_load_count = 1;
return ret;
}
NTSTATUS WINAPI TargetNtUnmapViewOfSection(
NtUnmapViewOfSectionFunction orig_UnmapViewOfSection, HANDLE process,
PVOID base) {
NTSTATUS ret = orig_UnmapViewOfSection(process, base);
if (!NT_SUCCESS(ret))
return ret;
if (!IsSameProcess(process))
return ret;
InterceptionAgent* agent = InterceptionAgent::GetInterceptionAgent();
if (agent)
agent->OnDllUnload(base);
return ret;
}
} // namespace sandbox
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