syntax = "proto3";

package join;

option go_package = "github.com/edgelesssys/constellation/v2/joinservice/joinproto";

service API {
    // IssueJoinTicket issues a join ticket for a new node.
    rpc IssueJoinTicket(IssueJoinTicketRequest) returns (IssueJoinTicketResponse);
    // IssueRejoinTicket issues a join ticket for a node that has previously joined the cluster.
    rpc IssueRejoinTicket(IssueRejoinTicketRequest) returns (IssueRejoinTicketResponse);
}


message IssueJoinTicketRequest {
    // disk_uuid is the UUID of a node's state disk.
    string disk_uuid = 1;
    // certificate_request is a certificate request for the node's kubelet certificate.
    bytes certificate_request = 2;
    // is_control_plane indicates whether the node is a control-plane node.
    bool is_control_plane = 3;
}

message IssueJoinTicketResponse {
    // state_disk_key is the key used to encrypt the state disk.
    bytes state_disk_key = 1;
    // measurement_salt is a salt used to derive the node's ClusterID.
    // This value is persisted on the state disk.
    bytes measurement_salt = 2;
    // measurement_secret is a secret used to derive the node's ClusterID.
    // This value is NOT persisted on the state disk.
    bytes measurement_secret = 3;
    // kubelet_cert is the certificate to be used by the kubelet.
    bytes kubelet_cert = 4;
    // api_server_endpoint is the endpoint of Constellation's API server.
    string api_server_endpoint = 5;
    // token is the Kubernetes Join Token to be used by the node to join the cluster.
    string token = 6;
    // discovery_token_ca_cert_hash is a hash of the root certificate authority presented by the Kubernetes control-plane.
    string discovery_token_ca_cert_hash = 7;
    // control_plane_files is a list of control-plane certificates and keys.
    repeated control_plane_cert_or_key control_plane_files = 8;
    // kubernetes_version is the Kubernetes version to install on the node.
    string kubernetes_version = 9;
    // kubernetes_components is a list of components to install on the node.
    repeated KubernetesComponent kubernetes_components = 10;
}

message control_plane_cert_or_key {
    // name of the certificate or key.
    string name = 1;
    // data of the certificate or key.
    bytes data = 2;
}

message IssueRejoinTicketRequest {
    // disk_uuid is the UUID of a node's state disk.
    string disk_uuid = 1;
}

message IssueRejoinTicketResponse {
    // state_disk_key is the key to decrypt the state disk.
    bytes state_disk_key = 1;
    // measurement_secret is a secret used to derive the node's ClusterID.
    // This value is NOT persisted on the state disk.
    bytes measurement_secret = 2;
}

// Discuss if we want to import the init proto instead of duplicating it
message KubernetesComponent {
    // url to download the component from.
    string url = 1;
    // hash of the component.
    string hash = 2;
    // install_path is the path to install the component to.
    string install_path = 3;
    // extract indicates whether the component is an archive and needs to be extracted.
    bool extract = 4;
  }