01aadf6a1f
Currently QR scanner supports only `openpgp4fpr` URIs. VCard specification
allows embedding public key information as an URI in `KEY` field [0]. Two
schemes used with this field - `https` and `data` are either insecure or
not practical [1]. As the value of `KEY` field is a URI one can use
`openpgp4fpr` URI there to have both secure and small links.
This change will extract URI from `KEY` field from a scanned VCard and
process it just like it would be a URI scanned directly. When a `openpgp4fpr`
URI is put there the UI would search and import the key and show the confirm
dialog.
Example VCard with this URI:
BEGIN:VCARD
FN:Test WKD
EMAIL:test-wkd@metacode.biz
KEY:OPENPGP4FPR:74EC8D3DA82A79DAA25DF10C6BA55ED83ABAE1BB
END:VCARD
[0]: https://tools.ietf.org/html/rfc6350#section-6.8.1
[1]: https://www.av8n.com/computer/htm/distributing-keys.htm#sec-fing