Add the Mojo implementation of authenticator.mojom's MakeCredential.

third_party/WebKit/public/platform/modules/webauth/authenticator.mojom

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [JavaPackage="org.chromium.webauth.mojom"]
 module webauth.mojom;
 
 // This file describes the communication between the WebAuthentication renderer
 // implementation and browser-side implementations to create scoped credentials
 // and use already-created credentials to get assertions.
 // See https://w3c.github.io/webauthn/.
 
+enum AuthenticatorStatus {
+  SUCCESS,
+  CANCELLED,
+  UNKNOWN_ERROR,
+  NOT_ALLOWED_ERROR,
+  NOT_SUPPORTED_ERROR,
+  SECURITY_ERROR,
+  NOT_IMPLEMENTED,
+};
+
 // The public key and attestation that is returned by an authenticator's 
 // call to makeCredential.
 struct ScopedCredentialInfo {
   // A blob of data containing the JSON serialization of client data passed
   // to the authenticator.
   array<uint8> client_data;
   // A blob of data returned from the authenticator.
   array<uint8> attestation;
 };
 
 // Information about the relying party and the user account held by that 
 // relying party. This information is used by the authenticator to create 
 // or retrieve an appropriate scoped credential for this account.
 // These fields take arbitrary input.
-
 struct RelyingPartyAccount {
   // Friendly name of the Relying Party, e.g. "Acme Corporation"
   string relying_party_display_name;
   // Friendly name associated with the user account, e.g. "John P. Smith"
   string display_name;
   // Identifier for the account, corresponding to no more than one credential 
   // per authenticator and Relying Party.
   string id;
   // Detailed name for the account, e.g. john.p.smith@example.com
-  string name;
+  string? name;
   // User image, if any.
-  // Todo make this url.mojom.Url in a followup CL
-  string image_url;
+  // TODO(kpaulhamus): make this url.mojom.Url in a followup CL
+  string? image_url;
 };
 
 // Parameters that are used to generate an appropriate scoped credential.
 struct ScopedCredentialParameters {
   ScopedCredentialType type;
   // TODO(kpaulhamus): add AlgorithmIdentifier algorithm;
 };
 
 // Optional parameters that are used during makeCredential. 
 struct ScopedCredentialOptions {
   //TODO(kpaulhamus): Make this mojo.common.mojom.TimeDelta in followup CL
-  int32 timeout_seconds;
-  string relying_party_id;
+  double adjusted_timeout;
+  string? relying_party_id;
   array<ScopedCredentialDescriptor> exclude_list;
   // TODO(kpaulhamus): add Extensions
 };
 
 enum ScopedCredentialType {
   SCOPEDCRED,
 };
 
 // Describes the credentials that the relying party already knows about for
 // the given account. If any of these are known to the authenticator, 
@@ skipping 10 matching lines @@
   USB,
   NFC,
   BLE,
 };
 
 // Interface to direct authenticators to create or use a scoped credential.
 interface Authenticator {
   // Gets the credential info for a new credential created by an authenticator
   // for the given relying party and account. 
   // |attestation_challenge| is a blob passed from the relying party server.
+  // [ScopedCredentialInfo] will only be set if status == SUCCESS. 
   MakeCredential(RelyingPartyAccount account_information,
                  array<ScopedCredentialParameters> crypto_parameters,
                  array<uint8> attestation_challenge,
-                 ScopedCredentialOptions? options)
-      => (array<ScopedCredentialInfo> scoped_credentials);
+                 ScopedCredentialOptions options)
+      => (AuthenticatorStatus status, 
+          ScopedCredentialInfo? scoped_credential);
 };