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I-cant-believe-its-not-webusb: Hacking around lack of WebUSB support in Firefox
Hacking around lack of WebUSB support in Firefox. Contribute to ArcaneNibble/i-cant-believe-its-not-webusb development by creating an account on GitHub.
buttons will toggle the LED, and the state of pin GP22 will be regularly updated on the page (you can conveniently short it to the adjacent GND pad with a piece of wire or metal). In order to allow for all of these low-cost designs without mandating any particular internal algorithms, the key handle is treated as opaque, and so we can abuse it to smuggle arbitrary data. Although it is sometimes possible to tell whether an ECDSA signature was actually calculated "properly" rather than being some numbers we just made up (see Issue #1), there isn't a good reason for anybody other than the relying party to perform anything beyond basic validity checks.
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