solo1
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solokeys
raspberry pi zero, solo firmware emulation
this is a stupid idea but, can someone help me find a way to emulate the firmware over usb gadget HID on raspberry pi zeroW
here is a repo i have seen, yet to test out, but https://github.com/Crystalix007/U2FDevice
would be nice attraction for solokey firmware experiments, the idea is to build the firmware on the piZeroW and have the device show up as a "ethernet+solo"
this idea is purely for development,
for a production, there is a lot of stuff to consider and that can be found at https://github.com/Crystalix007/U2FDevice#security-issues
so if someone wants to fix those "security-issues" for production, they would need a "HAT" with solokey hardware, and find a way to pipe the hardware over something like SPI to the usb_gadget. while also allowing updates over the spi. like with https://www.zymbit.com/zymkey/
but i that is a story for a different day.
Why gadget? maybe USBIP? https://github.com/solokeys/openpgp/tree/master/pc
@merlokk well you can use usb_gadget to emulate devices like @ http://www.isticktoit.net/?p=1383 like ethernet keyboard mass_storage, and i would like to emulate solokey with this
so i need to start with building a usb report_desc for HID device to match solokey hacker or sorts and then somehow run solokey firmware instead of usbip use the /dev/hidg0 gadget device
found a good article about the report descriptor, https://www.rmedgar.com/blog/using-rpi-zero-as-keyboard-report-descriptor
I have already added support for USB HID gadget in Solo, see this Makefile. On Ubuntu you can simply run make install as root and this will create /dev/hidg0. The Solo firmware should be started like this: ./main -b hidg
On Raspberry Pi with USB OTG you should already have a host controller, so no need to install dummy_hcd. Just configure the gadget and you should be good to go.
