feat: added connection and authentication

client can now generate a server binary, and try to connect to it and
get capabilities

sparse-05/sparse-05-common/Cargo.toml

@@ -6,6 +6,8 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+ecies-ed25519 = { version = "0.5.1", features = ["serde"] }
 ed25519-dalek = { version = "1.0.1", features = ["serde"] }
 rand = "0.7"
 serde = { version = "1.0.188", features = ["derive"] }
+serde_repr = "0.1"

sparse-05/sparse-05-common/src/lib.rs

@@ -3,17 +3,12 @@ pub const CONFIG_SEPARATOR: &'static [u8] =
 
 pub mod messages {
     pub const CONNECT_MESSAGE: &'static [u8] = b"CONNECT";
+    pub const CONNECTED_MESSAGE: &'static [u8] = b"CONNECTED";
 
     use std::{ffi::OsString, path::PathBuf};
 
-    use ed25519_dalek::Signature;
     use serde::{Deserialize, Serialize};
-
-    #[derive(Serialize, Deserialize)]
-    pub struct CommandWrapper {
-        sig: Signature,
-        command: Vec<u8>,
-    }
+    use serde_repr::{Deserialize_repr, Serialize_repr};
 
     #[derive(Serialize, Deserialize)]
     pub enum Command {
@@ -61,7 +56,7 @@ pub mod messages {
 
     #[derive(Serialize, Deserialize)]
     pub enum Response {
-        Connected(Capabilities),
+        // Connected(Capabilities, ed25519_dalek::PublicKey, ecies_ed25519::PublicKey),
         SendData(Vec<u8>),
 
         CdDone,
@@ -76,14 +71,23 @@ pub mod messages {
         DownloadFileSegment(u64, u64, Vec<u8>),
     }
 
-    #[derive(Serialize, Deserialize, Debug, Clone, Copy)]
+    #[derive(Serialize_repr, Deserialize_repr, Debug, Clone, Copy)]
+    #[repr(u8)]
     pub enum TransportType {
         RawUdp,
         Udp,
     }
 
+    #[derive(Serialize_repr, Deserialize_repr, Debug, Clone, Copy)]
+    #[repr(u8)]
+    pub enum OperatingSystem {
+        Windows,
+        Linux,
+    }
+
     #[derive(Serialize, Deserialize, Debug)]
     pub struct Capabilities {
+        pub operating_system: OperatingSystem,
         pub docker_container: bool,
         pub docker_breakout: bool,
         pub setuid: bool,