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/*++
Copyright (c) Microsoft Corporation. All rights reserved.
Module Name:
smartcard.cpp
Abstract:
This file implements the NFC smart card class.
Environment:
Windows User-Mode Driver Framework (WUDF)
--*/
#include "Internal.h"
#include "SmartCard.tmh"
CSmartCardRequest::CSmartCardRequest(_In_ CSmartCard *pSmartCard)
: m_pSmartCard(pSmartCard),
m_cbPayload(0),
m_hCompletionEvent(CreateEvent(nullptr, FALSE, FALSE, nullptr))
{
RtlZeroMemory(m_Payload, sizeof(m_Payload));
InitializeListHead(&m_ListEntry);
m_dwSequenceNum = m_pSmartCard->AddRequest(this);
}
CSmartCardRequest::~CSmartCardRequest()
{
m_pSmartCard->RemoveRequest(this);
SAFE_CLOSEHANDLE(m_hCompletionEvent);
}
VOID
CSmartCardRequest::CompleteRequest(
_In_ DWORD cbPayload,
_In_reads_bytes_(cbPayload) PBYTE pbPayload
)
{
RtlZeroMemory(m_Payload, sizeof(m_Payload));
if (cbPayload <= sizeof(m_Payload)) {
RtlCopyMemory(m_Payload, pbPayload, cbPayload);
m_cbPayload = cbPayload;
}
SetEvent(m_hCompletionEvent);
}
NTSTATUS CSmartCardRequest::WaitForCompletion()
{
return (WaitForSingleObject(m_hCompletionEvent, ResponseTimeoutInMs) == WAIT_OBJECT_0) ? STATUS_SUCCESS : STATUS_IO_TIMEOUT;
}
CSmartCard::CSmartCard(_In_ WDFDEVICE Device, _In_ CConnection* pConnection)
: m_Device(Device),
m_pConnection(pConnection),
m_dwSequenceNum(0)
{
InitializeListHead(&m_RequestList);
InitializeCriticalSection(&m_ConnectionLock);
InitializeCriticalSection(&m_RequestListLock);
}
CSmartCard::~CSmartCard()
{
EnterCriticalSection(&m_RequestListLock);
while (!IsListEmpty(&m_RequestList)) {
delete CSmartCardRequest::FromListEntry(RemoveHeadList(&m_RequestList));
}
LeaveCriticalSection(&m_RequestListLock);
DeleteCriticalSection(&m_ConnectionLock);
DeleteCriticalSection(&m_RequestListLock);
SAFE_DELETE(m_pConnection);
}
NTSTATUS
CSmartCard::SendCommand(
_In_reads_bytes_(InputBufferLength) PVOID InputBuffer,
_In_ size_t InputBufferLength,
_Out_writes_bytes_opt_(OutputBufferLength) PVOID OutputBuffer,
_In_ size_t OutputBufferLength,
_Out_ size_t* BytesTransferred
)
{
MethodEntry("...");
NTSTATUS Status = STATUS_SUCCESS;
MESSAGE *pMessage = nullptr;
DWORD dwSequenceNum = 0;
CSmartCardRequest *pRequest = nullptr;
BYTE* pbPayload = nullptr;
*BytesTransferred = 0;
if (InputBufferLength > MaxCbPayload) {
Status = STATUS_INVALID_BUFFER_SIZE;
goto Exit;
}
pRequest = new CSmartCardRequest(this);
if (pRequest == nullptr) {
Status = STATUS_INSUFFICIENT_RESOURCES;
goto Exit;
}
pbPayload = new BYTE[InputBufferLength + sizeof(DWORD)];
if (pbPayload == nullptr) {
Status = STATUS_INSUFFICIENT_RESOURCES;
goto Exit;
}
dwSequenceNum = pRequest->GetSequenceNum();
RtlCopyMemory(pbPayload, &dwSequenceNum, sizeof(DWORD));
RtlCopyMemory(pbPayload + sizeof(DWORD), InputBuffer, InputBufferLength);
pMessage = new MESSAGE();
if (pMessage == nullptr) {
Status = STATUS_INSUFFICIENT_RESOURCES;
goto Exit;
}
pMessage->Initialize(SMARTCARD_MESSAGE_TYPE_TRANSMIT, (DWORD)InputBufferLength + sizeof(DWORD), pbPayload);
EnterCriticalSection(&m_ConnectionLock);
if (FAILED(m_pConnection->TransmitMessage(pMessage))) {
Status = STATUS_DATA_ERROR;
LeaveCriticalSection(&m_ConnectionLock);
goto Exit;
}
LeaveCriticalSection(&m_ConnectionLock);
Status = pRequest->WaitForCompletion();
if (NT_SUCCESS(Status)) {
*BytesTransferred = pRequest->GetPayloadSize();
if (OutputBufferLength >= *BytesTransferred) {
RtlCopyMemory(OutputBuffer, pRequest->GetPayload(), *BytesTransferred);
}
else {
Status = STATUS_BUFFER_TOO_SMALL;
}
}
Exit:
SAFE_DELETE(pMessage);
SAFE_DELETEARRAY(pbPayload);
SAFE_DELETE(pRequest);
MethodReturn(Status, "Status = %!STATUS! Output buffer size = %d and payload size = %d", Status, (DWORD)OutputBufferLength, (DWORD)*BytesTransferred);
}
BOOL CSmartCard::ResponseReceived(_In_ MESSAGE* pMessage)
{
MethodEntry("...");
BOOL fHandled = FALSE;
DWORD dwSequenceNum = 0;
if (CompareStringOrdinal(pMessage->m_szType, -1, SMARTCARD_MESSAGE_TYPE_TRANSMIT, -1, FALSE) == CSTR_EQUAL) {
if (pMessage->m_cbPayload >= sizeof(DWORD)) {
RtlCopyMemory(&dwSequenceNum, pMessage->m_Payload, sizeof(DWORD));
TraceInfo("Sequence number = %d and Payload size = %d", dwSequenceNum, pMessage->m_cbPayload);
EnterCriticalSection(&m_RequestListLock);
for (LIST_ENTRY* pEntry = m_RequestList.Flink;
pEntry != &m_RequestList;
pEntry = pEntry->Flink) {
CSmartCardRequest *pRequest = CSmartCardRequest::FromListEntry(pEntry);
if (dwSequenceNum == pRequest->GetSequenceNum()) {
pRequest->CompleteRequest(pMessage->m_cbPayload - sizeof(DWORD), pMessage->m_Payload + sizeof(DWORD));
fHandled = TRUE;
break;
}
}
LeaveCriticalSection(&m_RequestListLock);
}
}
MethodReturnBool(fHandled);
}
DWORD CSmartCard::AddRequest(_In_ CSmartCardRequest *pRequest)
{
NT_ASSERT(pRequest != nullptr);
EnterCriticalSection(&m_RequestListLock);
InsertHeadList(&m_RequestList, pRequest->GetListEntry());
LeaveCriticalSection(&m_RequestListLock);
return InterlockedIncrement(&m_dwSequenceNum);
}
VOID CSmartCard::RemoveRequest(_In_ CSmartCardRequest *pRequest)
{
NT_ASSERT(pRequest != nullptr);
EnterCriticalSection(&m_RequestListLock);
for (LIST_ENTRY* pEntry = m_RequestList.Flink;
pEntry != &m_RequestList;
pEntry = pEntry->Flink) {
if (pRequest == CSmartCardRequest::FromListEntry(pEntry)) {
RemoveEntryList(pEntry);
break;
}
}
LeaveCriticalSection(&m_RequestListLock);
}
NTSTATUS
CSmartCard::GetAtr(
_Out_writes_bytes_(*pcbAtr) PBYTE pbAtr,
_Inout_ LPDWORD pcbAtr
)
{
FunctionEntry("...");
NTSTATUS Status = STATUS_SUCCESS;
WDFKEY hKey = nullptr;
WDFMEMORY Memory;
DWORD Type;
PBYTE Buffer = nullptr;
size_t BufferSize = 0;
DECLARE_CONST_UNICODE_STRING(KeyValue, L"Atr");
Status = WdfDeviceOpenRegistryKey(
m_Device,
PLUGPLAY_REGKEY_DEVICE,
KEY_READ,
WDF_NO_OBJECT_ATTRIBUTES,
&hKey);
if (NT_SUCCESS(Status)) {
Status = WdfRegistryQueryMemory(hKey, &KeyValue, PagedPool, nullptr, &Memory, &Type);
if (NT_SUCCESS(Status)) {
NT_ASSERT(Type == REG_BINARY);
Buffer = (PBYTE) WdfMemoryGetBuffer(Memory, &BufferSize);
if (*pcbAtr < BufferSize) {
Status = STATUS_BUFFER_TOO_SMALL;
}
else {
*pcbAtr = (DWORD)BufferSize;
RtlCopyMemory(pbAtr, Buffer, BufferSize);
}
WdfObjectDelete(Memory);
}
WdfRegistryClose(hKey);
}
FunctionReturn(Status, "Status = %!STATUS!", Status);
}
NTSTATUS
CSmartCard::GetIccType(
_Out_writes_bytes_(*pcbIccType) PBYTE pbIccType,
_Inout_ LPDWORD pcbIccType
)
{
FunctionEntry("...");
NTSTATUS Status = STATUS_SUCCESS;
WDFKEY hKey = nullptr;
DWORD Value = 0;
BYTE bValue = 0;
DECLARE_CONST_UNICODE_STRING(KeyValue, L"IccType");
Status = WdfDeviceOpenRegistryKey(
m_Device,
PLUGPLAY_REGKEY_DEVICE,
KEY_READ,
WDF_NO_OBJECT_ATTRIBUTES,
&hKey);
if (NT_SUCCESS(Status)) {
(VOID) WdfRegistryQueryULong(hKey, &KeyValue, &Value);
bValue = (BYTE)(Value & 0xFF);
if (*pcbIccType < sizeof(bValue)) {
Status = STATUS_BUFFER_TOO_SMALL;
}
else {
*pcbIccType = sizeof(bValue);
RtlCopyMemory(pbIccType, &bValue, sizeof(bValue));
}
WdfRegistryClose(hKey);
}
FunctionReturn(Status, "Status = %!STATUS!", Status);
}
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