1.6 Tpm Reader — Rpc8394

The RPC8394 typically connects via a pogo pin or clip-on adapter. This means you do not need to desolder the TPM chip from the motherboard. For forensic integrity, this is a massive win.

Kernel: ensure CONFIG_USB_TTY/CCID support if vendor requires kernel module. Most CCID devices work with libccid without extra kernel drivers.

udev: add udev rule mapping device by vendor/product ID to set permissions for /dev/bus/usb or /dev/pcsc* Example (place in /etc/udev/rules.d/99-rpc8394.rules):

Replace vvvv/pppp with the reader’s USB VID/PID. RPC8394 1.6 TPM reader

TPM commands are sent as byte arrays (TPM frames). Example structure: The RPC8394 typically connects via a pogo pin

| Byte offset | Field | Size (bytes) | Description | |-------------|--------------|--------------|---------------------------------| | 0 | Tag | 2 | Command tag (0x8001 or 0x8002) | | 2 | Command size | 4 | Total packet length | | 6 | Command code | 4 | TPM_CC_* opcode | | 10..N | Parameters | variable | Command-specific data | Replace vvvv/pppp with the reader’s USB VID/PID

CICC-OHIO

CICC-OHIO

1.6 Tpm Reader — Rpc8394