/**
 * Copyright 2013 Signal Messenger, LLC
 * SPDX-License-Identifier: AGPL-3.0-only
 */
syntax = "proto2";

package textsecure;

option java_package = "org.whispersystems.textsecuregcm.entities";
option java_outer_classname = "MessageProtos";

message Envelope {
  enum Type {
    UNKNOWN             = 0;
    CIPHERTEXT          = 1;
    KEY_EXCHANGE        = 2;
    PREKEY_BUNDLE       = 3;
    SERVER_DELIVERY_RECEIPT = 5;
    UNIDENTIFIED_SENDER = 6;
    reserved 7;
    PLAINTEXT_CONTENT = 8;  // for decryption error receipts
  }

  optional Type   type = 1;
  optional string source_uuid = 11;
  optional uint32 source_device = 7;
  optional uint64 timestamp = 5;
  optional bytes  content = 8; // Contains an encrypted Content
  optional string server_guid = 9;
  optional uint64 server_timestamp = 10;
  optional bool ephemeral = 12; // indicates that the message should not be persisted if the recipient is offline
  optional string destination_uuid = 13;
  optional bool urgent = 14 [default=true];
  optional string updated_pni = 15;
  optional bool story = 16; // indicates that the content is a story.
  optional bytes report_spam_token = 17; // token sent when reporting spam
  // next: 18
}

message ProvisioningUuid {
  optional string uuid = 1;
}

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

    optional bytes certificate = 1;
    optional bytes signature   = 2;
}

message SenderCertificate {
    message Certificate {
        optional string            sender        = 1;
        optional string            sender_uuid   = 6;
        optional uint32            sender_device = 2;
        optional fixed64           expires       = 3;
        optional bytes             identity_key  = 4;
        optional ServerCertificate signer        = 5;
    }

    optional bytes certificate = 1;
    optional bytes signature   = 2;
}