/**
 * Copyright (C) 2014-2016 Open Whisper Systems
 *
 * Licensed according to the LICENSE file in this repository.
 */

// iOS - since we use a modern proto-compiler, we must specify
// the legacy proto format.
syntax = "proto2";

// iOS - package name determines class prefix
package SMKProtos;

option java_package = "org.signal.libsignal.metadata";
option java_outer_classname = "SignalProtos";

message ServerCertificate {
    message Certificate {
        // @required
        optional uint32 id = 1;
        // @required
        optional bytes key = 2;
    }

    // @required
    optional bytes certificate = 1;
    // @required
    optional bytes signature = 2;
}

message SenderCertificate {
    message Certificate {
        // @required
        optional string sender = 1;
        // @required
        optional uint32 senderDevice = 2;
        // @required
        optional fixed64 expires = 3;
        // @required
        optional bytes identityKey = 4;
        // @required
        optional ServerCertificate signer = 5;
    }

    // @required
    optional string sender = 1;
    // @required
    optional uint32 senderDevice = 2;
}

message UnidentifiedSenderMessage {
    message Message {
        enum Type {
            PREKEY_MESSAGE = 1;
            MESSAGE = 2;
            FALLBACK_MESSAGE = 3;
        }

        // @required
        optional Type type = 1;
        // @required
        optional SenderCertificate senderCertificate = 2;
        // @required
        optional bytes content = 3;
    }

    // @required
    optional bytes ephemeralPublic = 1;
    // @required
    optional bytes encryptedStatic = 2;
    // @required
    optional bytes encryptedMessage = 3;
}