createcredential-clientdata.https.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /webauthn/createcredential-clientdata.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>WebAuthn navigator.credentials.create() clientData test</title>

<link rel="help" href="https://w3c.github.io/webauthn/#iface-credential">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/resources/testdriver.js"></script>

<script src="/resources/testdriver-vendor.js"></script>

<script src="helpers.js"></script>

<body></body>

<script>

standardSetup(function() {

    "use strict";

    const options = {

        rp: {name: "Acme"},

        user: {id: new Uint8Array(1), name: "name", displayName: ""},

        pubKeyCredParams: [{type: "public-key", alg: -7}],

        attestation: "none",

        challenge: new Uint8Array([0xff]),

};

    promise_test(async t => {

        const cred = await navigator.credentials.create({publicKey: options});

        // WebAuthn specifies a precise, JSON-compatible serialization for the

        // clientDataJSON. See

        // https://www.w3.org/TR/webauthn-2/#clientdatajson-serialization

        const expectedPrefix =

            `{"type":"webauthn.create","challenge":"_w","origin":"`;

        const clientData = new TextDecoder().decode(cred.response.clientDataJSON);

        assert_true(clientData.startsWith(expectedPrefix),

                    "The clientData (" + clientData +

                    ") should have the prefix: " + expectedPrefix);

        // Skip over the origin value by finding the closing quote.

        const originEnd = clientData.indexOf('"', expectedPrefix.length);

        assert_not_equals(originEnd, -1, "Should find the closing quote for origin");

        const expectedRemainder = `","crossOrigin":false`;

        assert_true(clientData.substring(originEnd).startsWith(expectedRemainder),

                    "The clientData (" + clientData +

                    ") should have the following after the origin: " +

                    expectedRemainder);

    }, "navigator.credentials.create() has valid clientData");

});

</script>