syntax = "proto3";

import "google/protobuf/timestamp.proto";

option go_package = "/proto";

package management;

service ManagementService {

  // Login logs in peer. In case server returns codes.PermissionDenied this endpoint can be used to register Peer providing LoginRequest.setupKey
  // Returns encrypted LoginResponse in EncryptedMessage.Body
  rpc Login(EncryptedMessage) returns (EncryptedMessage) {}

  // Sync enables peer synchronization. Each peer that is connected to this stream will receive updates from the server.
  // For example, if a new peer has been added to an account all other connected peers will receive this peer's Wireguard public key as an update
  // The initial SyncResponse contains all of the available peers so the local state can be refreshed
  // Returns encrypted SyncResponse in EncryptedMessage.Body
  rpc Sync(EncryptedMessage) returns (stream EncryptedMessage) {}

  // Exposes a Wireguard public key of the Management service.
  // This key is used to support message encryption between client and server
  rpc GetServerKey(Empty) returns (ServerKeyResponse) {}

  // health check endpoint
  rpc isHealthy(Empty) returns (Empty) {}

  // Exposes a device authorization flow information
  // This is used for initiating a Oauth 2 device authorization grant flow
  // which will be used by our clients to Login.
  // EncryptedMessage of the request has a body of DeviceAuthorizationFlowRequest.
  // EncryptedMessage of the response has a body of DeviceAuthorizationFlow.
  rpc GetDeviceAuthorizationFlow(EncryptedMessage) returns (EncryptedMessage) {}

  // Exposes a PKCE authorization code flow information
  // This is used for initiating a Oauth 2 authorization grant flow
  // with Proof Key for Code Exchange (PKCE) which will be used by our clients to Login.
  // EncryptedMessage of the request has a body of PKCEAuthorizationFlowRequest.
  // EncryptedMessage of the response has a body of PKCEAuthorizationFlow.
  rpc GetPKCEAuthorizationFlow(EncryptedMessage) returns (EncryptedMessage) {}
}

message EncryptedMessage {
  // Wireguard public key
  string wgPubKey = 1;

  // encrypted message Body
  bytes body = 2;
  // Version of the Wiretrustee Management Service protocol
  int32 version = 3;
}

message SyncRequest {}

// SyncResponse represents a state that should be applied to the local peer (e.g. Wiretrustee servers config as well as local peer and remote peers configs)
message SyncResponse {

  // Global config
  WiretrusteeConfig wiretrusteeConfig = 1;

  // Deprecated. Use NetworkMap.PeerConfig
  PeerConfig peerConfig = 2;

  // Deprecated. Use NetworkMap.RemotePeerConfig
  repeated RemotePeerConfig remotePeers = 3;

  // Indicates whether remotePeers array is empty or not to bypass protobuf null and empty array equality.
  // Deprecated. Use NetworkMap.remotePeersIsEmpty
  bool remotePeersIsEmpty = 4;

  NetworkMap NetworkMap = 5;
}

message LoginRequest {
  // Pre-authorized setup key (can be empty)
  string setupKey = 1;
  // Meta data of the peer (e.g. name, os_name, os_version,
  PeerSystemMeta meta = 2;
  // SSO token (can be empty)
  string jwtToken = 3;
  // Can be absent for now.
  PeerKeys peerKeys = 4;

}
// PeerKeys is additional peer info like SSH pub key and WireGuard public key.
// This message is sent on Login or register requests, or when a key rotation has to happen.
message PeerKeys {

  // sshPubKey represents a public SSH key of the peer. Can be absent.
  bytes sshPubKey = 1;
  // wgPubKey represents a public WireGuard key of the peer. Can be absent.
  bytes wgPubKey = 2;
}

// PeerSystemMeta is machine meta data like OS and version.
message PeerSystemMeta {
  string hostname = 1;
  string goOS = 2;
  string kernel = 3;
  string core = 4;
  string platform = 5;
  string OS = 6;
  string wiretrusteeVersion = 7;
  string uiVersion = 8;
}

message LoginResponse {
  // Global config
  WiretrusteeConfig wiretrusteeConfig = 1;
  // Peer local config
  PeerConfig peerConfig = 2;
}

message ServerKeyResponse {
  // Server's Wireguard public key
  string key = 1;
  // Key expiration timestamp after which the key should be fetched again by the client
  google.protobuf.Timestamp expiresAt = 2;
  // Version of the Wiretrustee Management Service protocol
  int32 version = 3;
}

message Empty {}

// WiretrusteeConfig is a common configuration of any Wiretrustee peer. It contains STUN, TURN, Signal and Management servers configurations
message WiretrusteeConfig {
  // a list of STUN servers
  repeated HostConfig stuns = 1;
  // a list of TURN servers
  repeated ProtectedHostConfig turns = 2;

  // a Signal server config
  HostConfig signal = 3;
}

// HostConfig describes connection properties of some server (e.g. STUN, Signal, Management)
message HostConfig {
  // URI of the resource e.g. turns://stun.wiretrustee.com:4430 or signal.wiretrustee.com:10000
  string uri = 1;
  Protocol protocol = 2;

  enum Protocol {
    UDP = 0;
    TCP = 1;
    HTTP = 2;
    HTTPS = 3;
    DTLS = 4;
  }
}
// ProtectedHostConfig is similar to HostConfig but has additional user and password
// Mostly used for TURN servers
message ProtectedHostConfig {
  HostConfig hostConfig = 1;
  string user = 2;
  string password = 3;
}

// PeerConfig represents a configuration of a "our" peer.
// The properties are used to configure local Wireguard
message PeerConfig {
  // Peer's virtual IP address within the Wiretrustee VPN (a Wireguard address config)
  string  address = 1;
  // Wiretrustee DNS server (a Wireguard DNS config)
  string dns = 2;

  // SSHConfig of the peer.
  SSHConfig sshConfig = 3;
  // Peer fully qualified domain name
  string fqdn = 4;
}

// NetworkMap represents a network state of the peer with the corresponding configuration parameters to establish peer-to-peer connections
message NetworkMap {
  // Serial is an ID of the network state to be used by clients to order updates.
  // The larger the Serial the newer the configuration.
  // E.g. the client app should keep track of this id locally and discard all the configurations with a lower value
  uint64 Serial = 1;

  // PeerConfig represents configuration of a peer
  PeerConfig peerConfig = 2;

  // RemotePeerConfig represents a list of remote peers that the receiver can connect to
  repeated RemotePeerConfig remotePeers = 3;

  // Indicates whether remotePeers array is empty or not to bypass protobuf null and empty array equality.
  bool remotePeersIsEmpty = 4;

  // List of routes to be applied
  repeated Route Routes = 5;

  // DNS config to be applied
  DNSConfig DNSConfig = 6;

  // RemotePeerConfig represents a list of remote peers that the receiver can connect to
  repeated RemotePeerConfig offlinePeers = 7;

  // FirewallRule represents a list of firewall rules to be applied to peer
  repeated FirewallRule FirewallRules = 8;

  // firewallRulesIsEmpty indicates whether FirewallRule array is empty or not to bypass protobuf null and empty array equality.
  bool firewallRulesIsEmpty = 9;
}

// RemotePeerConfig represents a configuration of a remote peer.
// The properties are used to configure WireGuard Peers sections
message RemotePeerConfig {

  // A WireGuard public key of a remote peer
  string wgPubKey = 1;

  // WireGuard allowed IPs of a remote peer e.g. [10.30.30.1/32]
  repeated string allowedIps = 2;

  // SSHConfig is a SSH config of the remote peer. SSHConfig.sshPubKey should be ignored because peer knows it's SSH key.
  SSHConfig sshConfig = 3;

  // Peer fully qualified domain name
  string fqdn = 4;

}

// SSHConfig represents SSH configurations of a peer.
message SSHConfig {
  // sshEnabled indicates whether a SSH server is enabled on this peer
  bool sshEnabled = 1;

  // sshPubKey is a SSH public key of a peer to be added to authorized_hosts.
  // This property should be ignore if SSHConfig comes from PeerConfig.
  bytes sshPubKey = 2;
}

// DeviceAuthorizationFlowRequest empty struct for future expansion
message DeviceAuthorizationFlowRequest {}
// DeviceAuthorizationFlow represents Device Authorization Flow information
// that can be used by the client to login initiate a Oauth 2.0 device authorization grant flow
// see https://datatracker.ietf.org/doc/html/rfc8628
message DeviceAuthorizationFlow {
  // An IDP provider , (eg. Auth0)
  provider Provider = 1;
  ProviderConfig ProviderConfig = 2;

  enum provider {
    HOSTED = 0;
  }
}

// PKCEAuthorizationFlowRequest empty struct for future expansion
message PKCEAuthorizationFlowRequest {}

// PKCEAuthorizationFlow represents Authorization Code Flow information
// that can be used by the client to login initiate a Oauth 2.0 authorization code grant flow
// with Proof Key for Code Exchange (PKCE). See https://datatracker.ietf.org/doc/html/rfc7636
message PKCEAuthorizationFlow {
  ProviderConfig ProviderConfig = 1;
}

// ProviderConfig has all attributes needed to initiate a device/pkce authorization flow
message ProviderConfig {
  // An IDP application client id
  string ClientID = 1;
  // An IDP application client secret
  string ClientSecret = 2;
  // An IDP API domain
  // Deprecated. Use a DeviceAuthEndpoint and TokenEndpoint
  string Domain = 3;
  // An Audience for validation
  string Audience = 4;
  // DeviceAuthEndpoint is an endpoint to request device authentication code.
  string DeviceAuthEndpoint = 5;
  // TokenEndpoint is an endpoint to request auth token.
  string TokenEndpoint = 6;
  // Scopes provides the scopes to be included in the token request
  string Scope = 7;
  // UseIDToken indicates if the id token should be used for authentication
  bool UseIDToken = 8;
  // AuthorizationEndpoint is the endpoint of an IDP manager where clients can obtain authorization code.
  string AuthorizationEndpoint = 9;
  // RedirectURLs handles authorization code from IDP manager
  repeated string RedirectURLs = 10;
}

// Route represents a route.Route object
message Route {
  string ID = 1;
  string Network = 2;
  int64  NetworkType = 3;
  string Peer = 4;
  int64  Metric = 5;
  bool   Masquerade = 6;
  string NetID = 7;
}

// DNSConfig represents a dns.Update
message DNSConfig {
  bool ServiceEnable = 1;
  repeated NameServerGroup NameServerGroups = 2;
  repeated CustomZone CustomZones = 3;
}

// CustomZone represents a dns.CustomZone
message CustomZone {
  string Domain = 1;
  repeated SimpleRecord Records = 2;
}

// SimpleRecord represents a dns.SimpleRecord
message SimpleRecord {
  string Name = 1;
  int64 Type = 2;
  string Class = 3;
  int64 TTL = 4;
  string RData = 5;
}

// NameServerGroup represents a dns.NameServerGroup
message NameServerGroup {
  repeated NameServer NameServers = 1;
  bool Primary = 2;
  repeated string Domains = 3;
  bool SearchDomainsEnabled = 4;
}

// NameServer represents a dns.NameServer
message NameServer {
  string IP = 1;
  int64  NSType = 2;
  int64  Port = 3;
}

// FirewallRule represents a firewall rule
message FirewallRule {
  string PeerIP = 1;
  direction Direction = 2;
  action Action = 3;
  protocol Protocol = 4;
  string Port = 5;

  enum direction {
    IN = 0;
    OUT = 1;
  }
  enum action {
    ACCEPT = 0;
    DROP = 1;
  }
  enum protocol {
    UNKNOWN = 0;
    ALL = 1;
    TCP = 2;
    UDP = 3;
    ICMP = 4;
  }
}