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yohanes / teensy-u2f

Teensy LC U2F key implementation
http://tinyhack.com/2015/11/08/teensy-lc-u2f-key/
BSD 2-Clause "Simplified" License
143 stars 28 forks source link

Digispark USB #7

Open ronnyandre opened 6 years ago

ronnyandre commented 6 years ago

Could this potentially work on a Digispark USB, as this microcontroller is even smaller than a Teensy?

yohanes commented 6 years ago

Digispark USB uses Attiny85, this microcontroller doesn't support hardware multiplication. Attiny85 only has 512 bytes of RAM and also this is not enough even for the basic protocol (just for receiving the message from the computer, we need more for the crypto stuff).