Auth-bypass-tool-v6 Libusb

open libusb context
find device by VID/PID
open device handle
if kernel driver active: detach kernel driver
claim interface
send control transfer to enter bootloader (if required)
send bulk transfer with payload
read responses until done
release interface
reattach kernel driver (optional)
close handle
exit libusb context

auth-bypass-tool-v6 runs libusb_get_device_list() to list all USB devices. It filters by known VID/PID of the target token.

Many OSes automatically load a driver for USB tokens (e.g., hidraw or ccid). The tool calls libusb_detach_kernel_driver() to take raw control. auth-bypass-tool-v6 libusb

Implement a kernel callback that prevents libusb_detach_kernel_driver() by marking your device’s interface as “unclaimable” from user space. On Linux, this involves writing a small kernel module with .supports_autosuspend = 0 and blocking IOCTL_USB_DISCLAIM. open libusb context find device by VID/PID open