On Sat, Dec 13, 2014 at 4:06 PM, Benjamin Tissoires <benjamin.tissoires@xxxxxxxxx> wrote: > > On Dec 13, 2014 6:28 PM, "Andy Lutomirski" <luto@xxxxxxxxxxxxxx> wrote: >> >> On Sat, Dec 13, 2014 at 2:56 PM, Jiri Kosina <jkosina@xxxxxxx> wrote: >> > On Fri, 12 Dec 2014, Andy Lutomirski wrote: >> > >> >> It's roughly ISO7816-3. For the uninitiated (and the ISO7816 standard >> >> is amazingly vague), that means that the application sends a short >> >> (<64kB) binary request to the device (with a type, two "parameters", >> >> and a payload), and the device answers with exactly one reply packet >> >> that has two bytes of status and a payload. These requests and >> >> replies are fragmented into multiple HID reports. >> > >> > Sorry for taking one (or maybe even more) step back, but what makes this >> > thing even "HID device"? >> > >> > Yes, it interacts with human beings, but are the operations it's doing >> > covered by HID specification (at least in a "does it have HID >> > descriptor" >> > sense)? It's not really completely clear to me at this point. >> >> It has a HID descriptor, it's recognized by the HID stack, it >> understands SET_REPORT, and it generates async HID reports. Hidraw is >> willing to talk to it and, in fact, Chromium talks to it using hidraw >> (ugh). >> >> It's also supposed to be *enumerated* by reading the HID descriptor. >> There are multiple vendors of these things, and the USB descriptor >> doesn't seem to have anything in it to identify the device. >> >> I think that's the full extent to which it's a HID device. > > And the most important, these devices have a button on them :) Someone should have told the U2F committee that the device should send a HID report, then :-/ (Also, at least one implementation is missing the button. You "press the button" by unplugging and replugging the whole device.) --Andy > > Cheers, > Benjamin > >> >> --Andy >> >> > >> > Thanks, >> > >> > -- >> > Jiri Kosina >> > SUSE Labs >> >> >> >> -- >> Andy Lutomirski >> AMA Capital Management, LLC -- Andy Lutomirski AMA Capital Management, LLC -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
