CmGetDeviceMappedPropertyFromRegProp

VOID __stdcall CmGetDeviceMappedPropertyFromRegProp(
        _IRP *Irp,
        _FILE_OBJECT *FileObject,
        _REPARSE_DATA_BUFFER *ReparseBuffer){
  __int64 v3; 
  UINT8 *PropertyBuffer; 
  _QWORD *v5; 
  unsigned int v6; 
  int v7; 
  DEVPROPKEY **v8; 
  unsigned int i; 
  DEVPROPKEY *v10; 
  DEVPROPKEY **v11; 
  __int64 v12; 
  unsigned int v13; 
  VOID *v14; 
  WCHAR *v15; 
  HPNPCTX *v16; 
  NTSTATUS v17; 
  NTSTATUS DeviceRegProp; 
  WCHAR *v19; 
  HPNPCTX *v20; 
  int v21; 
  UINT64 v22; 
  UINT8 *PoolWithTag; 
  const wchar_t *v24; 
  int v25; 
  unsigned int Len; 
  INT64 v27; 
  INT64 v28; 
  NTSTATUS v29; 
  UINT64 *CmRegPropType; 
  UINT64 Flags; 
  UINT64 Flagsa; 
  UINT64 v34; 
  HPNPCTX *hPnpCtx; 
  UINT8 v36[4]; 
  WCHAR *DeviceInstanceId; 
  VOID *BaseKeyHandle; 
  UINT64 v39; 
  VOID *DeviceKey; 
  PVOID P; 
  _UNICODE_STRING DestinationString; 
  _GUID Guid; 
  UINT8 v44[76]; 
  __int16 v45; 
  int *v46; 
  UINT8 *v47; 
  unsigned int v48; 
  UINT64 *PropertySize; 
  int v50; 

  PropertyBuffer = v47;
  v5 = (_QWORD *)v3;
  BaseKeyHandle = ReparseBuffer;
  DeviceInstanceId = (WCHAR *)FileObject;
  hPnpCtx = (HPNPCTX *)&Irp->Type;
  LODWORD(v39) = 0;
  v34 = 0i64;
  *(_DWORD *)v36 = 0;
  P = 0i64;
  DeviceKey = 0i64;
  DestinationString = 0i64;
  Guid = 0i64;
  if( (_WORD)v50 )
    return;
  *v46 = 0;
  *(_DWORD *)PropertySize = 0;
  if( v47 )
  {
    v6 = v48;
    PropertyBuffer = (UINT8 *)(-(__int64)(v48 != 0) & (unsigned __int64)v47);
  }
  else
  {
    v6 = 0;
  }
  v7 = *(_DWORD *)(v3 + 16);
  v8 = &CmDeviceRegPropMap;
  for( i = 0; i < 0x21; ++i )
  {
    v10 = *v8;
    v11 = v8;
    if( v7 == (*v8)->pid )
    {
      v12 = *v5 - *(_QWORD *)&v10->fmtid.Data1;
      if( *v5 == *(_QWORD *)&v10->fmtid.Data1 )
        v12 = v5[1] - *(_QWORD *)v10->fmtid.Data4;
      if( !v12 )
        break;
    }
    v8 += 3;
    v11 = 0i64;
  }
  if( !v11 )
    return;
  v13 = *((_DWORD *)v11 + 3);
  switch( v13 )
  {
    case 9u:
      goto LABEL_40;
    case 0x19u:
      return;
    case 0x1Bu:
      v19 = DeviceInstanceId;
      LODWORD(Flags) = v50;
      LODWORD(v34) = 4;
      DeviceRegProp = CmGetDeviceRegProp(
                        hPnpCtx,
                        DeviceInstanceId,
                        BaseKeyHandle,
                        27i64,
                        (UINT64 *)((char *)&v34 + 4),
                        v36,
                        &v34,
                        Flags);
      if( DeviceRegProp >= 0 )
      {
        if( HIDWORD(v34) != *((_DWORD *)v11 + 4) )
          return;
        *(_DWORD *)PropertySize = 1;
        *v46 = *((_DWORD *)v11 + 2);
        if( v6 < *(_DWORD *)PropertySize )
          return;
        *PropertyBuffer = -(*(_DWORD *)v36 != 0);
      }
      goto LABEL_20;
    case 0x25u:
LABEL_40:
      v27 = v13;
      v19 = DeviceInstanceId;
      LODWORD(Flags) = v50;
      LODWORD(v34) = 78;
      DeviceRegProp = CmGetDeviceRegProp(
                        hPnpCtx,
                        DeviceInstanceId,
                        BaseKeyHandle,
                        v27,
                        (UINT64 *)((char *)&v34 + 4),
                        v44,
                        &v34,
                        Flags);
      if( DeviceRegProp >= 0 )
      {
        if( HIDWORD(v34) != *((_DWORD *)v11 + 4) )
          return;
        *(_DWORD *)PropertySize = 16;
        *v46 = *((_DWORD *)v11 + 2);
        if( v6 < *(_DWORD *)PropertySize )
          return;
        v45 = 0;
        DeviceRegProp = RtlInitUnicodeStringEx(&DestinationString, (WCHAR *)v44);
        if( DeviceRegProp >= 0 )
        {
          DeviceRegProp = RtlGUIDFromString(&DestinationString, &Guid);
          if( DeviceRegProp >= 0 )
            *(_GUID *)PropertyBuffer = Guid;
        }
      }
      goto LABEL_20;
  }
  v14 = BaseKeyHandle;
  v15 = DeviceInstanceId;
  v16 = hPnpCtx;
  LODWORD(Flags) = v50;
  *(_DWORD *)PropertySize = v6;
  v17 = CmGetDeviceRegProp(v16, v15, v14, v13, (UINT64 *)((char *)&v34 + 4), PropertyBuffer, PropertySize, Flags);
  DeviceRegProp = v17;
  if( v17 && v17 != -1073741789 )
    goto LABEL_18;
  if( HIDWORD(v34) != *((_DWORD *)v11 + 4) )
    return;
  v21 = *((_DWORD *)v11 + 2);
  *v46 = v21;
  if( v21 != 18 )
    goto LABEL_18;
  v22 = *(unsigned int *)PropertySize;
  LODWORD(v34) = *(_DWORD *)PropertySize;
  if( DeviceRegProp )
  {
    if( DeviceRegProp != -1073741789 )
      goto LABEL_18;
    PoolWithTag = (UINT8 *)ExAllocatePoolWithTag(1ui64, v22, 1380994640i64);
    if( !PoolWithTag )
      return;
    v28 = v13;
    v19 = DeviceInstanceId;
    v20 = hPnpCtx;
    LODWORD(Flagsa) = v50;
    v29 = CmGetDeviceRegProp(hPnpCtx, DeviceInstanceId, BaseKeyHandle, v28, &v39, PoolWithTag, &v34, Flagsa);
    if( v29 < 0 )
    {
      DeviceRegProp = v29;
      ExFreePoolWithTag(PoolWithTag, 0);
LABEL_21:
      if( DeviceRegProp == -1073741810 )
      {
        LODWORD(CmRegPropType) = 1;
        if( !CmOpenDeviceRegKey(
                v20,
                v19,
                CM_KEY_TYPE_DEVICE_INSTANCE,
                0i64,
                (UINT64)CmRegPropType,
                0,
                &DeviceKey,
                0i64) )
          ZwClose((_HANDLE)DeviceKey);
      }
      return;
    }
    if( (unsigned int)v34 < 2 )
    {
LABEL_31:
      if( PoolWithTag )
        ExFreePoolWithTag(PoolWithTag, 0);
LABEL_18:
      if( DeviceRegProp )
      {
        v19 = DeviceInstanceId;
LABEL_20:
        v20 = hPnpCtx;
        goto LABEL_21;
      }
      goto LABEL_33;
    }
    v24 = (const wchar_t *)PoolWithTag;
LABEL_28:
    if( v24 && (PnpParseIndirectInfString(v24) || PnpParseIndirectResourceString((__int64)v24)) )
      *v46 = 25;
    goto LABEL_31;
  }
  if( v6 >= 2 )
  {
    PoolWithTag = (UINT8 *)P;
    v24 = (const wchar_t *)PropertyBuffer;
    goto LABEL_28;
  }
LABEL_33:
  v25 = *v46;
  if( *v46 == 8210 )
  {
    Len = PnpMultiSzGetLen((const WCHAR *)PropertyBuffer);
    if( 2 * (unsigned __int64)Len > *(unsigned int *)PropertySize )
    {
      *(_DWORD *)PropertySize = 0;
      return;
    }
    *(_DWORD *)PropertySize = 2 * Len;
    v25 = *v46;
  }
  if( v25 == 18 && !*(_DWORD *)PropertySize )
  {
    *(_DWORD *)PropertySize = 0;
    *v46 = 0;
  }
}

Referenced by: