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// Copyright (c) 2006-2010 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/sandbox_poc/pocdll/exports.h"
#include "sandbox/sandbox_poc/pocdll/utils.h"
#include "sandbox/tools/finder/ntundoc.h"
// This file contains the tests used to verify the security of handles in
// the process
NTQUERYOBJECT NtQueryObject;
NTQUERYINFORMATIONFILE NtQueryInformationFile;
NTQUERYSYSTEMINFORMATION NtQuerySystemInformation;
void POCDLL_API TestGetHandle(HANDLE log) {
HandleToFile handle2file;
FILE *output = handle2file.Translate(log, "w");
// Initialize the NTAPI functions we need
HMODULE ntdll_handle = ::GetModuleHandle(L"ntdll.dll");
if (!ntdll_handle) {
fprintf(output, "[ERROR] Cannot load ntdll.dll. Error %d\r\n",
::GetLastError());
return;
}
NtQueryObject = reinterpret_cast<NTQUERYOBJECT>(
GetProcAddress(ntdll_handle, "NtQueryObject"));
NtQueryInformationFile = reinterpret_cast<NTQUERYINFORMATIONFILE>(
GetProcAddress(ntdll_handle, "NtQueryInformationFile"));
NtQuerySystemInformation = reinterpret_cast<NTQUERYSYSTEMINFORMATION>(
GetProcAddress(ntdll_handle, "NtQuerySystemInformation"));
if (!NtQueryObject || !NtQueryInformationFile || !NtQuerySystemInformation) {
fprintf(output, "[ERROR] Cannot load all NT functions. Error %d\r\n",
::GetLastError());
return;
}
// Get the number of handles on the system
DWORD buffer_size = 0;
SYSTEM_HANDLE_INFORMATION_EX temp_info;
NTSTATUS status = NtQuerySystemInformation(
SystemHandleInformation, &temp_info, sizeof(temp_info),
&buffer_size);
if (!buffer_size) {
fprintf(output, "[ERROR] Get the number of handles. Error 0x%X\r\n",
status);
return;
}
SYSTEM_HANDLE_INFORMATION_EX *system_handles =
reinterpret_cast<SYSTEM_HANDLE_INFORMATION_EX*>(new BYTE[buffer_size]);
status = NtQuerySystemInformation(SystemHandleInformation, system_handles,
buffer_size, &buffer_size);
if (STATUS_SUCCESS != status) {
fprintf(output, "[ERROR] Failed to get the handle list. Error 0x%X\r\n",
status);
delete [] system_handles;
return;
}
for (ULONG i = 0; i < system_handles->NumberOfHandles; ++i) {
USHORT h = system_handles->Information[i].Handle;
if (system_handles->Information[i].ProcessId != ::GetCurrentProcessId())
continue;
OBJECT_NAME_INFORMATION *name = NULL;
ULONG name_size = 0;
// Query the name information a first time to get the size of the name.
status = NtQueryObject(reinterpret_cast<HANDLE>(h),
ObjectNameInformation,
name,
name_size,
&name_size);
if (name_size) {
name = reinterpret_cast<OBJECT_NAME_INFORMATION *>(new BYTE[name_size]);
// Query the name information a second time to get the name of the
// object referenced by the handle.
status = NtQueryObject(reinterpret_cast<HANDLE>(h),
ObjectNameInformation,
name,
name_size,
&name_size);
}
PUBLIC_OBJECT_TYPE_INFORMATION *type = NULL;
ULONG type_size = 0;
// Query the object to get the size of the object type name.
status = NtQueryObject(reinterpret_cast<HANDLE>(h),
ObjectTypeInformation,
type,
type_size,
&type_size);
if (type_size) {
type = reinterpret_cast<PUBLIC_OBJECT_TYPE_INFORMATION *>(
new BYTE[type_size]);
// Query the type information a second time to get the object type
// name.
status = NtQueryObject(reinterpret_cast<HANDLE>(h),
ObjectTypeInformation,
type,
type_size,
&type_size);
}
// NtQueryObject cannot return the name for a file. In this case we
// need to ask NtQueryInformationFile
FILE_NAME_INFORMATION *file_name = NULL;
if (type && wcsncmp(L"File", type->TypeName.Buffer,
(type->TypeName.Length /
sizeof(type->TypeName.Buffer[0]))) == 0) {
// This function does not return the size of the buffer. We need to
// iterate and always increase the buffer size until the function
// succeeds. (Or at least does not fail with STATUS_BUFFER_OVERFLOW)
ULONG size_file = MAX_PATH;
IO_STATUS_BLOCK status_block = {0};
do {
// Delete the previous buffer create. The buffer was too small
if (file_name) {
delete[] reinterpret_cast<BYTE*>(file_name);
file_name = NULL;
}
// Increase the buffer and do the call agan
size_file += MAX_PATH;
file_name = reinterpret_cast<FILE_NAME_INFORMATION *>(
new BYTE[size_file]);
status = NtQueryInformationFile(reinterpret_cast<HANDLE>(h),
&status_block,
file_name,
size_file,
FileNameInformation);
} while (status == STATUS_BUFFER_OVERFLOW);
if (STATUS_SUCCESS != status) {
if (file_name) {
delete[] file_name;
file_name = NULL;
}
}
}
if (file_name) {
UNICODE_STRING file_name_string;
file_name_string.Buffer = file_name->FileName;
file_name_string.Length = (USHORT)file_name->FileNameLength;
file_name_string.MaximumLength = (USHORT)file_name->FileNameLength;
fprintf(output, "[GRANTED] Handle 0x%4.4X Access: 0x%8.8X "
"Type: %-13.13wZ Path: %wZ\r\n",
h,
system_handles->Information[i].GrantedAccess,
type ? &type->TypeName : NULL,
&file_name_string);
} else {
fprintf(output, "[GRANTED] Handle 0x%4.4X Access: 0x%8.8X "
"Type: %-13.13wZ Path: %wZ\r\n",
h,
system_handles->Information[i].GrantedAccess,
type ? &type->TypeName : NULL,
name ? &name->ObjectName : NULL);
}
if (type) {
delete[] type;
}
if (file_name) {
delete[] file_name;
}
if (name) {
delete [] name;
}
}
if (system_handles) {
delete [] system_handles;
}
}
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