test_webauthn_loopback.html

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  <title>Full-run test for MakeCredential/GetAssertion for W3C Web Authentication</title>

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<h1>Full-run test for MakeCredential/GetAssertion for W3C Web Authentication</h1>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1309284">Mozilla Bug 1309284</a>

<script class="testbody" type="text/javascript">

"use strict";

add_task(async function() {

  // This test intentionally compares items to themselves.

  /* eslint-disable no-self-compare */

  await SpecialPowers.pushPrefEnv({"set": [["security.webauth.webauthn_testing_allow_direct_attestation", true]]});

  await addVirtualAuthenticator();

  is(navigator.authentication, undefined, "navigator.authentication does not exist any longer");

  isnot(navigator.credentials, undefined, "Credential Management API endpoint must exist");

  isnot(navigator.credentials.create, undefined, "CredentialManagement create API endpoint must exist");

  isnot(navigator.credentials.get, undefined, "CredentialManagement get API endpoint must exist");

  let credm = navigator.credentials;

  let gCredentialChallenge = new Uint8Array(16);

  window.crypto.getRandomValues(gCredentialChallenge);

  let gAssertionChallenge = new Uint8Array(16);

  window.crypto.getRandomValues(gAssertionChallenge);

  await testMakeCredential();

  async function decodeCreatedCredential(aCredInfo) {

    /* PublicKeyCredential : Credential

       - rawId: Key Handle buffer pulled from U2F Register() Response

       - id: Key Handle buffer in base64url form, should == rawId

       - type: Literal 'public-key'

       - response : AuthenticatorAttestationResponse : AuthenticatorResponse

         - attestationObject: CBOR object

         - clientDataJSON: serialized JSON

*/

    is(aCredInfo.type, "public-key", "Credential type must be public-key")

    ok(aCredInfo.rawId.byteLength > 0, "Key ID exists");

    is(aCredInfo.id, bytesToBase64UrlSafe(aCredInfo.rawId), "Encoded Key ID and Raw Key ID match");

    ok(aCredInfo.rawId === aCredInfo.rawId, "PublicKeyCredential.RawID is SameObject");

    ok(aCredInfo.response === aCredInfo.response, "PublicKeyCredential.Response is SameObject");

    ok(aCredInfo.response.clientDataJSON === aCredInfo.response.clientDataJSON, "PublicKeyCredential.Response.ClientDataJSON is SameObject");

    ok(aCredInfo.response.attestationObject === aCredInfo.response.attestationObject, "PublicKeyCredential.Response.AttestationObject is SameObject");

    let clientData = JSON.parse(buffer2string(aCredInfo.response.clientDataJSON));

    is(clientData.challenge, bytesToBase64UrlSafe(gCredentialChallenge), "Challenge is correct");

    is(clientData.origin, window.location.origin, "Origin is correct");

    is(clientData.type, "webauthn.create", "Type is correct");

    let attestationObj = await webAuthnDecodeCBORAttestation(aCredInfo.response.attestationObject);

    // Make sure the RP ID hash matches what we calculate.

    let calculatedRpIdHash = await crypto.subtle.digest("SHA-256", string2buffer(document.domain));

    let calcHashStr = bytesToBase64UrlSafe(new Uint8Array(calculatedRpIdHash));

    let providedHashStr = bytesToBase64UrlSafe(new Uint8Array(attestationObj.authDataObj.rpIdHash));

    is(calcHashStr, providedHashStr, "Calculated RP ID hash must match what the browser derived.");

    ok(true, attestationObj.authDataObj.flags[0] & (flag_TUP | flag_AT));

    ok(attestationObj.authDataObj.flags[0] & (flag_TUP | flag_AT) == (flag_TUP | flag_AT),

       "User presence and Attestation Object flags must be set");

    aCredInfo.clientDataObj = clientData;

    aCredInfo.publicKeyHandle = attestationObj.authDataObj.publicKeyHandle;

    aCredInfo.attestationObject = attestationObj.authDataObj.attestationAuthData;

    return aCredInfo;

  async function checkAssertionAndSigValid(aPublicKey, aAssertion) {

    /* PublicKeyCredential : Credential

       - rawId: ID of Credential from AllowList that succeeded

       - id: Key Handle buffer in base64url form, should == rawId

       - type: Literal 'public-key'

       - response : AuthenticatorAssertionResponse : AuthenticatorResponse

         - clientDataJSON: serialized JSON

         - authenticatorData: RP ID Hash || U2F Sign() Response

         - signature: U2F Sign() Response

*/

    is(aAssertion.type, "public-key", "Credential type must be public-key")

    ok(aAssertion.rawId.byteLength > 0, "Key ID exists");

    is(aAssertion.id, bytesToBase64UrlSafe(new Uint8Array(aAssertion.rawId)), "Encoded Key ID and Raw Key ID match");

    ok(aAssertion.response.authenticatorData === aAssertion.response.authenticatorData, "AuthenticatorAssertionResponse.AuthenticatorData is SameObject");

    ok(aAssertion.response.authenticatorData instanceof ArrayBuffer, "AuthenticatorAssertionResponse.AuthenticatorData is an ArrayBuffer");

    ok(aAssertion.response.signature === aAssertion.response.signature, "AuthenticatorAssertionResponse.Signature is SameObject");

    ok(aAssertion.response.signature instanceof ArrayBuffer, "AuthenticatorAssertionResponse.Signature is an ArrayBuffer");

    ok(aAssertion.response.userHandle === null, "AuthenticatorAssertionResponse.UserHandle is null for u2f authenticators");

    ok(aAssertion.response.authenticatorData.byteLength > 0, "Authenticator data exists");

    let clientData = JSON.parse(buffer2string(aAssertion.response.clientDataJSON));

    is(clientData.challenge, bytesToBase64UrlSafe(gAssertionChallenge), "Challenge is correct");

    is(clientData.origin, window.location.origin, "Origin is correct");

    is(clientData.type, "webauthn.get", "Type is correct");

    let attestation = await webAuthnDecodeAuthDataArray(aAssertion.response.authenticatorData);

    ok(new Uint8Array(attestation.flags)[0] & flag_TUP == flag_TUP, "User presence flag must be set");

    is(attestation.counter.byteLength, 4, "Counter must be 4 bytes");

    let params = await deriveAppAndChallengeParam(window.location.host, aAssertion.response.clientDataJSON, attestation);

    console.log(params);

    console.log("ClientData buffer: ", hexEncode(aAssertion.response.clientDataJSON));

    console.log("ClientDataHash: ", hexEncode(params.challengeParam));

    let signedData = await assembleSignedData(params.appParam, params.attestation.flags,

                                              params.attestation.counter, params.challengeParam);

    console.log(aPublicKey, signedData, aAssertion.response.signature);

    return await verifySignature(aPublicKey, signedData, aAssertion.response.signature);

  async function testMakeCredential() {

    let rp = {id: document.domain, name: "none"};

    let user = {id: new Uint8Array(), name: "none", displayName: "none"};

    let param = {type: "public-key", alg: cose_alg_ECDSA_w_SHA256};

    let makeCredentialOptions = {

rp,

      user,

      challenge: gCredentialChallenge,

      pubKeyCredParams: [param],

      attestation: "direct"

};

    let credential = await credm.create({publicKey: makeCredentialOptions})

    let decodedCredential = await decodeCreatedCredential(credential);

    await testMakeDuplicate(decodedCredential);

  async function testMakeDuplicate(aCredInfo) {

    let rp = {id: document.domain, name: "none"};

    let user = {id: new Uint8Array(), name: "none", displayName: "none"};

    let param = {type: "public-key", alg: cose_alg_ECDSA_w_SHA256};

    let makeCredentialOptions = {

rp,

      user,

      challenge: gCredentialChallenge,

      pubKeyCredParams: [param],

      excludeCredentials: [{type: "public-key", id: new Uint8Array(aCredInfo.rawId),

                     transports: ["usb"]}]

};

    await credm.create({publicKey: makeCredentialOptions})

    .then(function() {

      // We should have errored here!

      ok(false, "The excludeList didn't stop a duplicate being created!");

    }).catch((aReason) => {

      ok(aReason.toString().startsWith("InvalidStateError"), "Expect InvalidStateError, got " + aReason);

});

    await testAssertion(aCredInfo);

  async function testAssertion(aCredInfo) {

    let newCredential = {

      type: "public-key",

      id: new Uint8Array(aCredInfo.rawId),

      transports: ["usb"],

    let publicKeyCredentialRequestOptions = {

      challenge: gAssertionChallenge,

      timeout: 5000, // the minimum timeout is actually 15 seconds

      rpId: document.domain,

      allowCredentials: [newCredential]

};

    let assertion = await credm.get({publicKey: publicKeyCredentialRequestOptions});

    let sigVerifyResult = await checkAssertionAndSigValid(aCredInfo.publicKeyHandle, assertion);

    ok(sigVerifyResult, "Signing signature verified");

});

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Test Info: Warnings