// Pseudocode from decompiled cis202.sys NTSTATUS CaptureIrisImage(PDEVICE_EXTENSION dx, PUCHAR outBuffer, ULONG outLen) PURB urb = ExAllocatePool(NonPagedPool, sizeof(_URB_BULK_OR_INTERRUPT_TRANSFER)); urb->UrbBulkOrInterruptTransfer.TransferBufferLength = IRIS_RAW_SIZE; // 640*480 = 307200 bytes urb->UrbBulkOrInterruptTransfer.TransferBuffer = dx->IrisBuffer; // Non-paged pool urb->UrbBulkOrInterruptTransfer.TransferFlags = USBD_TRANSFER_DIRECTION_IN; IoCallDriver(dx->UsbDevice, urb); RtlCopyMemory(outBuffer, dx->IrisBuffer, outLen);
[CIS202_AddReg] HKR,,DevLoader,,*ntkern HKR,,NTMPDriver,,"cis202.sys" cogent cis-202 iris scanner driver windows 7 32 bit
| IOCTL | Function | |-------|----------| | 0x222000 | Capture iris image (returns raw 8-bit grayscale) | | 0x222004 | Set LED brightness (parameter: 0-255) | | 0x222008 | Get device firmware version | | 0x22200C | Start video stream for focus assist | | 0x222010 | Stop video stream | // Pseudocode from decompiled cis202
If you need a specific section expanded (e.g., full driver disassembly, Linux porting guide, or USB protocol dump), let me know. ULONG outLen) PURB urb = ExAllocatePool(NonPagedPool
[Version] Signature="$WINDOWS NT$" Class=Biometric ClassGuid=53D29EF7-377C-4D14-864B-EB3A85769359 Provider=%Cogent% DriverVer=09/15/2012,2.1.0.7 [Manufacturer] %MfgName%=Cogent, NTx86
[CIS202_DDI.NTx86] CopyFiles = CIS202_CopyFiles AddReg = CIS202_AddReg
Latency measured: ~180ms for capture + transfer on USB 2.0. For a deep paper, these CVEs are relevant: