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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const TEST_URL = "https://example.com/";
let expectNotSupportedError = expectError("NotSupported");
let expectInvalidStateError = expectError("InvalidState");
let expectSecurityError = expectError("Security");
function promiseU2FRegister(tab, app_id_) {
let challenge_ = crypto.getRandomValues(new Uint8Array(16));
challenge_ = bytesToBase64UrlSafe(challenge_);
return SpecialPowers.spawn(
tab.linkedBrowser,
[[app_id_, challenge_]],
function([app_id, challenge]) {
return new Promise(resolve => {
content.u2f.register(
app_id,
[{ version: "U2F_V2", challenge }],
[],
resolve
);
});
}
).then(res => {
is(res.errorCode, 0, "u2f.register() succeeded");
let data = base64ToBytesUrlSafe(res.registrationData);
is(data[0], 0x05, "Reserved byte is correct");
return data.slice(67, 67 + data[66]);
});
}
add_task(async function test_setup_u2f() {
return SpecialPowers.pushPrefEnv({
set: [["security.webauth.u2f", true]],
});
});
add_task(async function test_appid() {
// Open a new tab.
let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_URL);
// Get a keyHandle for a FIDO AppId.
let appid = "https://example.com/appId";
let keyHandle = await promiseU2FRegister(tab, appid);
// The FIDO AppId extension can't be used for MakeCredential.
await promiseWebAuthnMakeCredential(tab, "none", { appid })
.then(arrivingHereIsBad)
.catch(expectNotSupportedError);
// Using the keyHandle shouldn't work without the FIDO AppId extension.
// This will be an invalid state, because the softtoken will consent without
// having the correct "RP ID" via the FIDO extension.
await promiseWebAuthnGetAssertion(tab, keyHandle)
.then(arrivingHereIsBad)
.catch(expectInvalidStateError);
// Invalid app IDs (for the current origin) must be rejected.
await promiseWebAuthnGetAssertion(tab, keyHandle, {
appid: "https://bogus.com/appId",
})
.then(arrivingHereIsBad)
.catch(expectSecurityError);
// Non-matching app IDs must be rejected. Even when the user/softtoken
// consents, leading to an invalid state.
await promiseWebAuthnGetAssertion(tab, keyHandle, { appid: appid + "2" })
.then(arrivingHereIsBad)
.catch(expectInvalidStateError);
let rpId = new TextEncoder("utf-8").encode(appid);
let rpIdHash = await crypto.subtle.digest("SHA-256", rpId);
// Succeed with the right fallback rpId.
await promiseWebAuthnGetAssertion(tab, keyHandle, { appid }).then(
({ authenticatorData, clientDataJSON, extensions }) => {
is(extensions.appid, true, "appid extension was acted upon");
// Check that the correct rpIdHash is returned.
let rpIdHashSign = authenticatorData.slice(0, 32);
ok(memcmp(rpIdHash, rpIdHashSign), "rpIdHash is correct");
}
);
// Close tab.
BrowserTestUtils.removeTab(tab);
});
add_task(async function test_appid_unused() {
// Open a new tab.
let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_URL);
// Get a keyHandle for a FIDO AppId.
let appid = "https://example.com/appId";
let { attObj, rawId } = await promiseWebAuthnMakeCredential(tab);
let { authDataObj } = await webAuthnDecodeCBORAttestation(attObj);
// Make sure the RP ID hash matches what we calculate.
await checkRpIdHash(authDataObj.rpIdHash, "example.com");
// Get a new assertion.
let {
clientDataJSON,
authenticatorData,
signature,
extensions,
} = await promiseWebAuthnGetAssertion(tab, rawId, { appid });
ok(
"appid" in extensions,
`appid should be populated in the extensions data, but saw: ` +
`${JSON.stringify(extensions)}`
);
is(extensions.appid, false, "appid extension should indicate it was unused");
// Check auth data.
let attestation = await webAuthnDecodeAuthDataArray(
new Uint8Array(authenticatorData)
);
is(
"" + attestation.flags,
"" + flag_TUP,
"Assertion's user presence byte set correctly"
);
// Verify the signature.
let params = await deriveAppAndChallengeParam(
"example.com",
clientDataJSON,
attestation
);
let signedData = await assembleSignedData(
params.appParam,
params.attestation.flags,
params.attestation.counter,
params.challengeParam
);
let valid = await verifySignature(
authDataObj.publicKeyHandle,
signedData,
signature
);
ok(valid, "signature is valid");
// Close tab.
BrowserTestUtils.removeTab(tab);
});
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