| // Copyright 2013 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. |
| |
| syntax = "proto2"; |
| |
| option optimize_for = LITE_RUNTIME; |
| |
| package extensions.api.cast_channel; |
| |
| message CastMessage { |
| // Always pass a version of the protocol for future compatibility |
| // requirements. |
| enum ProtocolVersion { |
| CASTV2_1_0 = 0; |
| } |
| required ProtocolVersion protocol_version = 1; |
| |
| // source and destination ids identify the origin and destination of the |
| // message. They are used to route messages between endpoints that share a |
| // device-to-device channel. |
| // |
| // For messages between applications: |
| // - The sender application id is a unique identifier generated on behalf of |
| // the sender application. |
| // - The receiver id is always the the session id for the application. |
| // |
| // For messages to or from the sender or receiver platform, the special ids |
| // 'sender-0' and 'receiver-0' can be used. |
| // |
| // For messages intended for all endpoints using a given channel, the |
| // wildcard destination_id '*' can be used. |
| required string source_id = 2; |
| required string destination_id = 3; |
| |
| // This is the core multiplexing key. All messages are sent on a namespace |
| // and endpoints sharing a channel listen on one or more namespaces. The |
| // namespace defines the protocol and semantics of the message. |
| required string namespace = 4; |
| |
| // Encoding and payload info follows. |
| |
| // What type of data do we have in this message. |
| enum PayloadType { |
| STRING = 0; |
| BINARY = 1; |
| } |
| required PayloadType payload_type = 5; |
| |
| // Depending on payload_type, exactly one of the following optional fields |
| // will always be set. |
| optional string payload_utf8 = 6; |
| optional bytes payload_binary = 7; |
| } |
| |
| enum SignatureAlgorithm { |
| UNSPECIFIED = 0; |
| RSASSA_PKCS1v15 = 1; |
| RSASSA_PSS = 2; |
| } |
| |
| // Messages for authentication protocol between a sender and a receiver. |
| message AuthChallenge { |
| optional SignatureAlgorithm signature_algorithm = 1 |
| [default = RSASSA_PKCS1v15]; |
| } |
| |
| message AuthResponse { |
| required bytes signature = 1; |
| required bytes client_auth_certificate = 2; |
| repeated bytes intermediate_certificate = 3; |
| optional SignatureAlgorithm signature_algorithm = 4 |
| [default = RSASSA_PKCS1v15]; |
| } |
| |
| message AuthError { |
| enum ErrorType { |
| INTERNAL_ERROR = 0; |
| NO_TLS = 1; // The underlying connection is not TLS |
| SIGNATURE_ALGORITHM_UNAVAILABLE = 2; |
| } |
| required ErrorType error_type = 1; |
| } |
| |
| message DeviceAuthMessage { |
| // Request fields |
| optional AuthChallenge challenge = 1; |
| // Response fields |
| optional AuthResponse response = 2; |
| optional AuthError error = 3; |
| } |