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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 syntax = "proto2"; | |
6 | |
7 option optimize_for = LITE_RUNTIME; | |
8 | |
9 package extensions.core_api.cast_channel; | |
10 | |
11 message CastMessage { | |
12 // Always pass a version of the protocol for future compatibility | |
13 // requirements. | |
14 enum ProtocolVersion { | |
15 CASTV2_1_0 = 0; | |
16 } | |
17 required ProtocolVersion protocol_version = 1; | |
18 | |
19 // source and destination ids identify the origin and destination of the | |
20 // message. They are used to route messages between endpoints that share a | |
21 // device-to-device channel. | |
22 // | |
23 // For messages between applications: | |
24 // - The sender application id is a unique identifier generated on behalf of | |
25 // the sender application. | |
26 // - The receiver id is always the the session id for the application. | |
27 // | |
28 // For messages to or from the sender or receiver platform, the special ids | |
29 // 'sender-0' and 'receiver-0' can be used. | |
30 // | |
31 // For messages intended for all endpoints using a given channel, the | |
32 // wildcard destination_id '*' can be used. | |
33 required string source_id = 2; | |
34 required string destination_id = 3; | |
35 | |
36 // This is the core multiplexing key. All messages are sent on a namespace | |
37 // and endpoints sharing a channel listen on one or more namespaces. The | |
38 // namespace defines the protocol and semantics of the message. | |
39 required string namespace = 4; | |
40 | |
41 // Encoding and payload info follows. | |
42 | |
43 // What type of data do we have in this message. | |
44 enum PayloadType { | |
45 STRING = 0; | |
46 BINARY = 1; | |
47 } | |
48 required PayloadType payload_type = 5; | |
49 | |
50 // Depending on payload_type, exactly one of the following optional fields | |
51 // will always be set. | |
52 optional string payload_utf8 = 6; | |
53 optional bytes payload_binary = 7; | |
54 } | |
55 | |
56 enum SignatureAlgorithm { | |
57 UNSPECIFIED = 0; | |
58 RSASSA_PKCS1v15 = 1; | |
59 RSASSA_PSS = 2; | |
60 } | |
61 | |
62 // Messages for authentication protocol between a sender and a receiver. | |
63 message AuthChallenge { | |
64 optional SignatureAlgorithm signature_algorithm = 1 | |
65 [default = RSASSA_PKCS1v15]; | |
66 } | |
67 | |
68 message AuthResponse { | |
69 required bytes signature = 1; | |
70 required bytes client_auth_certificate = 2; | |
71 repeated bytes intermediate_certificate = 3; | |
72 optional SignatureAlgorithm signature_algorithm = 4 | |
73 [default = RSASSA_PKCS1v15]; | |
74 } | |
75 | |
76 message AuthError { | |
77 enum ErrorType { | |
78 INTERNAL_ERROR = 0; | |
79 NO_TLS = 1; // The underlying connection is not TLS | |
80 SIGNATURE_ALGORITHM_UNAVAILABLE = 2; | |
81 } | |
82 required ErrorType error_type = 1; | |
83 } | |
84 | |
85 message DeviceAuthMessage { | |
86 // Request fields | |
87 optional AuthChallenge challenge = 1; | |
88 // Response fields | |
89 optional AuthResponse response = 2; | |
90 optional AuthError error = 3; | |
91 } | |
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