introduce authentication transport function into DeviceProvider

PiperOrigin-RevId: 538909999

internal/interop/BUILD

@@ -1,3 +1,16 @@
+cc_library(
+    name = "authentication_transport_interface",
+    hdrs = [
+        "authentication_transport.h",
+    ],
+    visibility = [
+        "//:__subpackages__",
+    ],
+    deps = [
+        "@com_google_absl//absl/strings",
+    ],
+)
+
 cc_library(
     name = "device",
     hdrs = [
@@ -9,6 +22,7 @@ cc_library(
         "//presence:__subpackages__",
     ],
     deps = [
+        ":authentication_transport_interface",
         "//internal/platform:connection_info",
         "//internal/platform:types",
         "@com_google_absl//absl/strings",

internal/interop/authentication_transport.h

@@ -0,0 +1,33 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef THIRD_PARTY_NEARBY_INTERNAL_INTEROP_AUTHENTICATION_TRANSPORT_H_
+#define THIRD_PARTY_NEARBY_INTERNAL_INTEROP_AUTHENTICATION_TRANSPORT_H_
+
+#include <string>
+
+#include "absl/strings/string_view.h"
+
+namespace nearby {
+
+class AuthenticationTransport {
+ public:
+  virtual ~AuthenticationTransport() = default;
+  virtual void WriteMessage(absl::string_view message) const = 0;
+  virtual std::string ReadMessage() const = 0;
+};
+
+}  // namespace nearby
+
+#endif  // THIRD_PARTY_NEARBY_INTERNAL_INTEROP_AUTHENTICATION_TRANSPORT_H_

internal/interop/device_provider.h

@@ -15,10 +15,23 @@
 #ifndef THIRD_PARTY_NEARBY_CONNECTIONS_DEVICE_PROVIDER_H_
 #define THIRD_PARTY_NEARBY_CONNECTIONS_DEVICE_PROVIDER_H_
 
+#include "internal/interop/authentication_transport.h"
 #include "internal/interop/device.h"
 
 namespace nearby {
 
+enum class AuthenticationRole {
+  kUnknown = 0,
+  kInitiator = 1,
+  kReceiver = 2,
+};
+
+enum class AuthenticationStatus {
+  kUnknown = 0,
+  kSuccess = 1,
+  kFailure = 2,
+};
+
 // The base device provider class for use with the Nearby Connections V3 APIs.
 // This class currently provides a function to get the local device for whatever
 // client implements it.
@@ -27,6 +40,13 @@ class NearbyDeviceProvider {
   virtual ~NearbyDeviceProvider() = default;
 
   const virtual NearbyDevice* GetLocalDevice() = 0;
+  virtual AuthenticationStatus AuthenticateConnection(
+      NearbyDevice* local_device, NearbyDevice* remote_device,
+      AuthenticationRole role, absl::string_view shared_secret,
+      const AuthenticationTransport& authentication_transport) const {
+    // We want to check out-of-band by default (Show UKEY2 digits to user).
+    return AuthenticationStatus::kUnknown;
+  }
 };
 }  // namespace nearby