KeyVerificationState enum
QR key verification
You create possible methods from client.verificationMethods on device A
and send a request using request.start() which calls sendRequest() your client
now is in waitingAccept state, where ideally your client would now show some
waiting indicator.
On device B you now get a m.key.verification.request, you check the
methods from the request payload and see if anything is possible.
If not you cancel the request. (should this be cancelled? couldn't another device handle this?)
you the set the state to askAccept.
Your client would now show a button to accept/decline the request.
The user can then use acceptVerification()to accept the verification which
then sends a m.key.verification.ready. This also calls generateQrCode()
in it which populates the request.qrData depending on the qr mode.
B now sets the state askChoice
On device A you now get the ready event, which setups the possibleMethods
and qrData on A's side. Similarly A now sets their state to askChoice
At his point both sides are on the askChoice state.
BACKWARDS COMPATIBILITY HACK:
To work well with sdks prior to QR verification (0.20.5 and older), start will
be sent with ready itself if only sas is supported. This avoids weird glare
issues faced with start from both sides if clients are not on the same sdk
version (0.20.5 vs next)
https://matrix.to/#/!KBwfdofYJUmnsVoqwn:famedly.de/$wlHXlLQJdfrqKAF5KkuQrXydwOhY_uyqfH4ReasZqnA?via=neko.dev&via=famedly.de&via=lihotzki.de
Here your clients would ideally show a list of the possibleMethods and the
user can choose one. For QR specifically, you can show the QR code on the
device which supports showing the qr code and the device which supports
scanning can scan this code.
Assuming device A scans device B's code, device A would now send a m.key.verification.start,
you do this using the continueVerificatio() method. You can pass
m.reciprocate.v1 or m.sas.v1 here, and also attach the qrData here.
This then calls verifyQrData() internally, which sets the randomSharedSecretForQRCode
to the one from the QR code. Device A is now set to showQRSuccess state and shows
a green sheild. (Maybe add a text below saying tell device B you scanned the
code successfully.)
(some keys magic happens here, check verifyQrData(), verifyKeysQR() to know more)
On device B you get the m.key.verification.start event. The secret sent in
the start request is then verified, device B is then set to the confirmQRScan
state. Your device should show a dialog to confirm from B that A's device shows
the green shield (is in the done state). Once B confirms this physically, you
call the acceptQRScanConfirmation() function, which then does some keys
magic and sets B's state to done.
A gets the m.key.verification.done messsage and sends a done back, both
users can now dismiss the verification dialog safely.
Values
- askChoice → const KeyVerificationState
- askAccept → const KeyVerificationState
- askSSSS → const KeyVerificationState
- waitingAccept → const KeyVerificationState
- askSas → const KeyVerificationState
- showQRSuccess → const KeyVerificationState
- confirmQRScan → const KeyVerificationState
- waitingSas → const KeyVerificationState
- done → const KeyVerificationState
- error → const KeyVerificationState
Properties
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Constants
-
values
→ const List<
KeyVerificationState> - A constant List of the values in this enum, in order of their declaration.