unikernel/duniverse/ocaml-tls/lwt/examples/dune

@@ -0,0 +1,69 @@
+(library
+ (name ex_common)
+ (libraries lwt lwt.unix tls tls-lwt cmdliner fmt.cli logs.fmt fmt.tty logs.cli)
+ (modules ex_common))
+
+(executable
+ (name starttls_server)
+ (modules starttls_server)
+ (libraries tls-lwt lwt.unix ex_common))
+
+(executable
+ (name echo_server)
+ (modules echo_server)
+ (libraries tls-lwt lwt.unix ex_common))
+
+(executable
+ (name echo_server_sni)
+ (modules echo_server_sni)
+ (libraries tls-lwt lwt.unix ex_common))
+
+(executable
+ (name echo_server_alpn)
+ (modules echo_server_alpn)
+ (libraries tls-lwt lwt.unix ex_common))
+
+(executable
+ (name echo_client)
+ (modules echo_client)
+ (libraries tls-lwt lwt.unix ex_common))
+
+(executable
+ (name echo_client_alpn)
+ (modules echo_client_alpn)
+ (libraries tls-lwt lwt.unix ex_common))
+
+(executable
+ (name test_server)
+ (modules test_server)
+ (libraries tls-lwt lwt.unix ex_common))
+
+(executable
+ (name test_client)
+ (modules test_client)
+ (libraries tls-lwt lwt.unix ex_common))
+
+(executable
+ (name tls_over_tls)
+ (modules tls_over_tls)
+ (libraries tls-lwt lwt lwt.unix ex_common))
+
+(executable
+ (name http_client)
+ (modules http_client)
+ (libraries tls-lwt lwt.unix ex_common))
+
+(executable
+ (name fuzz_server)
+ (modules fuzz_server)
+ (libraries tls-lwt lwt.unix ex_common))
+
+(executable
+ (name resume_client)
+ (modules resume_client)
+ (libraries tls-lwt lwt.unix ex_common))
+
+(executable
+ (name resume_echo_server)
+ (modules resume_echo_server)
+ (libraries randomconv tls-lwt lwt.unix ex_common))

unikernel/duniverse/ocaml-tls/lwt/examples/echo_client.ml

@@ -0,0 +1,73 @@
+
+open Ex_common
+open Lwt
+
+let cached_session : Tls.Core.epoch_data =
+  let hex = Ohex.decode in
+  {
+    Tls.Core.side = `Client ;
+    protocol_version = `TLS_1_3 ;
+    ciphersuite = `DHE_RSA_WITH_AES_128_GCM_SHA256 ;
+    peer_random = hex "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f" ;
+    peer_certificate = None ;
+    peer_certificate_chain = [] ;
+    peer_name = None ;
+    trust_anchor = None ;
+    received_certificates = [] ;
+    own_random = hex "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f" ;
+    own_certificate = [] ;
+    own_private_key = None ;
+    own_name = None ;
+    master_secret = hex "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f" ;
+    exporter_master_secret = "" ;
+    session_id = "" ;
+    extended_ms = true ;
+    alpn_protocol = None ;
+    state = `Established ;
+    tls_unique = None ;
+  }
+
+let echo_client ?ca hostname port =
+  let open Lwt_io in
+  auth ?ca () >>= fun authenticator ->
+  X509_lwt.private_of_pems
+    ~cert:server_cert
+    ~priv_key:server_key >>= fun certificate ->
+  Tls_lwt.connect_ext
+    (get_ok Tls.Config.(client ~authenticator ~cached_session ~certificates:(`Single certificate) ~ciphers:Ciphers.supported ()))
+    (hostname, port) >>= fun (ic, oc) ->
+  Lwt.join [
+    lines ic    |> Lwt_stream.iter_s (printf "+ %s\n%!") ;
+    lines stdin |> Lwt_stream.iter_s (write_line oc)
+  ]
+
+let jump _ port host ca =
+  try
+    Lwt_main.run (echo_client ?ca host port)
+  with
+  | Tls_lwt.Tls_alert alert as exn ->
+    print_alert "remote end" alert ; raise exn
+  | Tls_lwt.Tls_failure alert as exn ->
+    print_fail "our end" alert ; raise exn
+
+open Cmdliner
+
+let port =
+  let doc = "Port to connect to" in
+  Arg.(value & opt int 443 & info [ "port" ] ~doc)
+
+let host =
+  let doc = "Host to connect to" in
+  Arg.(value & opt string "" & info [ "host" ] ~doc)
+
+let trust =
+  let doc = "Trust anchor" in
+  Arg.(value & opt (some string) None & info [ "trust" ] ~doc)
+
+let cmd =
+  let term = Term.(const jump $ setup_log $ port $ host $ trust)
+  and info = Cmd.info "echo_client" ~version:"2.0.3"
+  in
+  Cmd.v info term
+
+let () = exit (Cmd.eval cmd)

unikernel/duniverse/ocaml-tls/lwt/examples/echo_client_alpn.ml

@@ -0,0 +1,22 @@
+
+open Ex_common
+open Lwt
+
+let echo_client host port =
+  let open Lwt_io in
+  let port = int_of_string port in
+  let authenticator = null_auth in
+  Tls_lwt.Unix.connect
+    (get_ok Tls.Config.(client ~authenticator ~alpn_protocols:["http/1.1"; "h2"] ()))
+    (host, port) >>= fun t ->
+  match Tls_lwt.Unix.epoch t with
+  | Error () -> printl "Error"
+  | Ok epoch -> (
+    match epoch.Tls.Core.alpn_protocol with
+      | None -> printl "No protocol selected"
+      | Some protocol -> printl ("Selected protocol: " ^ protocol)
+  )
+    >>= fun () -> Tls_lwt.Unix.close t
+
+let () =
+  Lwt_main.run (echo_client "127.0.0.1" "4433")

unikernel/duniverse/ocaml-tls/lwt/examples/echo_server.ml

@@ -0,0 +1,75 @@
+open Lwt
+open Ex_common
+
+let string_of_unix_err err f p =
+  Printf.sprintf "Unix_error (%s, %s, %s)"
+    (Unix.error_message err) f p
+
+let serve_ssl port callback =
+
+  let tag = "server" in
+
+  X509_lwt.private_of_pems
+    ~cert:server_cert
+    ~priv_key:server_key >>= fun cert ->
+
+  let server_s () =
+    let open Lwt_unix in
+    let s = socket PF_INET SOCK_STREAM 0 in
+    setsockopt s SO_REUSEADDR true ;
+    bind s (ADDR_INET (Unix.inet_addr_any, port)) >|= fun () ->
+    listen s 10 ;
+    s in
+
+  let handle channels addr =
+    async @@ fun () ->
+      Lwt.catch (fun () -> callback channels addr >>= fun () -> yap ~tag "<- handler done")
+        (function
+          | Tls_lwt.Tls_alert a ->
+            yap ~tag @@ "handler: " ^ Tls.Packet.alert_type_to_string a
+          | Tls_lwt.Tls_failure a ->
+            yap ~tag @@ "handler: " ^ Tls.Engine.string_of_failure a
+          | Unix.Unix_error (e, f, p) ->
+            yap ~tag @@ "handler: " ^ (string_of_unix_err e f p)
+          | _exn -> yap ~tag "handler: exception")
+  in
+
+  yap ~tag ("-> start @ " ^ string_of_int port) >>= fun () ->
+  let rec loop s =
+    let authenticator = null_auth in
+    let config = get_ok (Tls.Config.server ~version:(`TLS_1_0, `TLS_1_3) ~ciphers:Tls.Config.Ciphers.supported ~reneg:true ~certificates:(`Single cert) ~authenticator ()) in
+    (Lwt.catch
+       (fun () -> Tls_lwt.accept_ext config s >|= fun r -> `R r)
+       (function
+         | Unix.Unix_error (e, f, p) -> return (`L (string_of_unix_err e f p))
+         | Tls_lwt.Tls_alert a -> return (`L (Tls.Packet.alert_type_to_string a))
+         | Tls_lwt.Tls_failure f -> return (`L (Tls.Engine.string_of_failure f))
+         | exn -> return (`L ("loop: exception: " ^ Printexc.to_string exn)))) >>= function
+    | `R (channels, addr) ->
+      yap ~tag "-> connect" >>= fun () -> ( handle channels addr ; loop s )
+    | `L (msg) ->
+      yap ~tag ("server socket: " ^ msg) >>= fun () -> loop s
+    in
+    server_s () >>= fun s ->
+    loop s
+
+let echo_server _ port =
+  Lwt_main.run (
+    serve_ssl port @@ fun (ic, oc) _addr ->
+    lines ic |> Lwt_stream.iter_s (fun line ->
+        yap ~tag:"handler" ("+ " ^ line) >>= fun () ->
+        Lwt_io.write_line oc line))
+
+open Cmdliner
+
+let port =
+  let doc = "Port to connect to" in
+  Arg.(value & opt int 4433 & info [ "port" ] ~doc)
+
+let cmd =
+  let term = Term.(ret (const echo_server $ setup_log $ port))
+  and info = Cmd.info "echo_server" ~version:"2.0.3"
+  in
+  Cmd.v info term
+
+let () = exit (Cmd.eval cmd)

unikernel/duniverse/ocaml-tls/lwt/examples/echo_server_alpn.ml

@@ -0,0 +1,68 @@
+
+open Lwt
+open Ex_common
+
+let split_on_char sep s =
+  let r = ref [] in
+  let j = ref (String.length s) in
+  for i = String.length s - 1 downto 0 do
+    if s.[i] = sep then begin
+      r := String.sub s (i + 1) (!j - i - 1) :: !r;
+      j := i
+    end
+  done;
+  String.sub s 0 !j :: !r
+
+let serve_ssl alpn_protocols port callback =
+
+  let tag = "server" in
+
+  X509_lwt.private_of_pems
+    ~cert:server_cert
+    ~priv_key:server_key >>= fun certificate ->
+
+  let server_s =
+    let open Lwt_unix in
+    let s = socket PF_INET SOCK_STREAM 0 in
+    bind s (ADDR_INET (Unix.inet_addr_any, port)) >|= fun () ->
+    listen s 10 ;
+    s in
+
+  let handle ep channels addr =
+    let alpn = match ep with
+      | Ok data -> (match data.Tls.Core.alpn_protocol with
+          | Some a -> a
+          | None -> "no alpn")
+      | Error () -> "no session"
+    in
+    async @@ fun () ->
+    Lwt.catch (fun () -> callback alpn channels addr >>= fun () -> yap ~tag "<- handler done")
+      (function
+        | Tls_lwt.Tls_alert a ->
+          yap ~tag @@ "handler: " ^ Tls.Packet.alert_type_to_string a
+        | exn -> yap ~tag "handler: exception" >>= fun () -> fail exn)
+  in
+
+  let ps = string_of_int port in
+  yap ~tag ("-> start @ " ^ ps ^ " (use `openssl s_client -connect host:" ^ ps ^ " -alpn <proto>`), available protocols: " ^ String.concat "," alpn_protocols) >>= fun () ->
+  let rec loop () =
+    let config = get_ok (Tls.Config.server ~certificates:(`Single certificate) ~alpn_protocols ()) in
+    server_s >>= fun s ->
+    Tls_lwt.Unix.accept config s >>= fun (t, addr) ->
+    yap ~tag "-> connect" >>= fun () ->
+    ( handle (Tls_lwt.Unix.epoch t) (Tls_lwt.of_t t) addr ; loop () )
+  in
+  loop ()
+
+
+let echo_server protocols port =
+  serve_ssl protocols port @@ fun alpn (ic, oc) _addr ->
+    lines ic |> Lwt_stream.iter_s (fun line ->
+      yap ~tag:("handler alpn: " ^ alpn) ("+ " ^ line) >>= fun () ->
+      Lwt_io.write_line oc line)
+
+let () =
+  let protocols =
+    try split_on_char ',' Sys.argv.(1) with _ -> [ "h2" ; "http/1.1" ]
+  in
+  Lwt_main.run (echo_server protocols 4433)

unikernel/duniverse/ocaml-tls/lwt/examples/echo_server_sni.ml

@@ -0,0 +1,61 @@
+
+open Lwt
+open Ex_common
+
+let serve_ssl port callback =
+
+  let tag = "server" in
+
+  X509_lwt.private_of_pems
+    ~cert:(ca_cert_dir ^ "/bar.pem")
+    ~priv_key:server_key >>= fun barcert ->
+
+  X509_lwt.private_of_pems
+    ~cert:(ca_cert_dir ^ "/foo.pem")
+    ~priv_key:server_key >>= fun foocert ->
+
+  let server_s =
+    let open Lwt_unix in
+    let s = socket PF_INET SOCK_STREAM 0 in
+    bind s (ADDR_INET (Unix.inet_addr_any, port)) >|= fun () ->
+    listen s 10 ;
+    s in
+
+  let handle ep channels addr =
+    let host = match ep with
+      | Ok data -> ( match data.Tls.Core.own_name with
+          | Some n -> Domain_name.to_string n
+          | None -> "no name" )
+      | Error () -> "no session"
+    in
+    async @@ fun () ->
+    Lwt.catch (fun () -> callback host channels addr >>= fun () -> yap ~tag "<- handler done")
+      (function
+        | Tls_lwt.Tls_alert a ->
+          yap ~tag @@ "handler: " ^ Tls.Packet.alert_type_to_string a
+        | exn -> yap ~tag "handler: exception" >>= fun () -> fail exn)
+  in
+
+  let ps = string_of_int port in
+  yap ~tag ("-> start @ " ^ ps ^ " (use `openssl s_client -connect host:" ^ ps ^ " -servername foo` (or -servername bar))") >>= fun () ->
+  let rec loop () =
+    let config = get_ok (Tls.Config.server ~certificates:(`Multiple [barcert ; foocert]) ()) in
+    server_s >>= fun s ->
+    Tls_lwt.Unix.accept config s >>= fun (t, addr) ->
+    yap ~tag "-> connect" >>= fun () ->
+    ( handle (Tls_lwt.Unix.epoch t) (Tls_lwt.of_t t) addr ; loop () )
+  in
+  loop ()
+
+
+let echo_server port =
+  serve_ssl port @@ fun host (ic, oc) _addr ->
+    lines ic |> Lwt_stream.iter_s (fun line ->
+      yap ~tag:("handler " ^ host) ("+ " ^ line) >>= fun () ->
+      Lwt_io.write_line oc line)
+
+let () =
+  let port =
+    try int_of_string Sys.argv.(1) with _ -> 4433
+  in
+  Lwt_main.run (echo_server port)

unikernel/duniverse/ocaml-tls/lwt/examples/ex_common.ml

@@ -0,0 +1,55 @@
+
+open Lwt
+
+let o f g x = f (g x)
+
+let ca_cert_dir = "./certificates"
+let server_cert = "./certificates/server.pem"
+let server_key  = "./certificates/server.key"
+let server_ec_cert = "./certificates/server-ec.pem"
+let server_ec_key  = "./certificates/server-ec.key"
+
+let yap ~tag msg = Lwt_io.printf "(%s %s)\n%!" tag msg
+
+let lines ic =
+  Lwt_stream.from @@ fun () ->
+    Lwt_io.read_line_opt ic >>= function
+      | None -> Lwt_io.close ic >>= fun () -> return_none
+      | line -> return line
+
+let print_alert where alert =
+    Printf.eprintf "(TLS ALERT (%s): %s)\n%!"
+      where (Tls.Packet.alert_type_to_string alert)
+
+let print_fail where fail =
+  Printf.eprintf "(TLS FAIL (%s): %s)\n%!"
+    where (Tls.Engine.string_of_failure fail)
+
+let null_auth ?ip:_ ~host:_ _ = Ok None
+
+let auth ?ca ?fp () =
+  match ca with
+  | Some "NONE" when fp = None -> Lwt.return null_auth
+  | _ ->
+    let a = match ca, fp with
+      | None, Some fp  -> `Hex_key_fingerprint (`SHA256, fp)
+      | None, _ -> `Ca_dir ca_cert_dir
+      | Some f, _ -> `Ca_file f
+    in
+    X509_lwt.authenticator a
+
+let setup_log style_renderer level =
+  Fmt_tty.setup_std_outputs ?style_renderer ();
+  Logs.set_level level;
+  Logs.set_reporter (Logs_fmt.reporter ~dst:Format.std_formatter ())
+
+open Cmdliner
+
+let setup_log =
+  Term.(const setup_log
+        $ Fmt_cli.style_renderer ()
+        $ Logs_cli.level ())
+
+let get_ok = function
+  | Ok cfg -> cfg
+  | Error `Msg msg -> invalid_arg msg

unikernel/duniverse/ocaml-tls/lwt/examples/fuzz_server.ml

@@ -0,0 +1,101 @@
+open Lwt
+open Ex_common
+
+let string_of_unix_err err f p =
+  Printf.sprintf "Unix_error (%s, %s, %s)"
+    (Unix.error_message err) f p
+
+let add_to_cache, find_in_cache =
+  let c = ref [] in
+  (fun ticket session ->
+     let id = ticket.Tls.Core.identifier in
+     Logs.info (fun m -> m "adding id %a to cache" Ohex.pp id) ;
+     c := (id, (ticket, session)) :: !c),
+  (fun id -> match List.find_opt (fun (id', _) -> String.compare id id' = 0) !c with
+     | None -> None
+     | Some (_, ep) -> Some ep)
+
+let ticket_cache = {
+  Tls.Config.lookup = find_in_cache ;
+  ticket_granted = add_to_cache ;
+  lifetime = 300l ;
+  timestamp = Ptime_clock.now
+}
+
+let serve_ssl port callback =
+
+  let tag = "server" in
+
+  X509_lwt.private_of_pems
+    ~cert:server_cert
+    ~priv_key:server_key >>= fun cert ->
+
+  let server_s () =
+    let open Lwt_unix in
+    let s = socket PF_INET SOCK_STREAM 0 in
+    setsockopt s SO_REUSEADDR true ;
+    bind s (ADDR_INET (Unix.inet_addr_any, port)) >|= fun () ->
+    listen s 10 ;
+    s in
+
+  let handle channels addr =
+    async @@ fun () ->
+      Lwt.catch (fun () -> callback channels addr >>= fun () -> yap ~tag "<- handler done")
+        (function
+          | Tls_lwt.Tls_alert a ->
+            yap ~tag @@ "handler: " ^ Tls.Packet.alert_type_to_string a
+          | Tls_lwt.Tls_failure a ->
+            yap ~tag @@ "handler: " ^ Tls.Engine.string_of_failure a
+          | Unix.Unix_error (e, f, p) ->
+            yap ~tag @@ "handler: " ^ (string_of_unix_err e f p)
+          | _exn -> yap ~tag "handler: exception")
+  in
+
+  yap ~tag ("-> start @ " ^ string_of_int port) >>= fun () ->
+  let rec loop s =
+    let config = get_ok (Tls.Config.server ~ticket_cache ~reneg:true ~certificates:(`Single cert) ~version:(`TLS_1_2, `TLS_1_3) ~zero_rtt:32768l ()) in
+    (Lwt.catch
+       (fun () -> Tls_lwt.Unix.accept config s >|= fun r -> `R r)
+       (function
+         | Unix.Unix_error (e, f, p) -> return (`L (string_of_unix_err e f p))
+         | Tls_lwt.Tls_alert a -> return (`L (Tls.Packet.alert_type_to_string a))
+         | Tls_lwt.Tls_failure f -> return (`L (Tls.Engine.string_of_failure f))
+         | exn -> let str = Printexc.to_string exn in return (`L ("loop: exception " ^ str)))) >>= function
+    | `R (t, addr) ->
+      let channels = Tls_lwt.of_t t in
+      yap ~tag "-> connect" >>= fun () -> ( handle channels addr ; loop s )
+    | `L (msg) ->
+      yap ~tag ("server socket: " ^ msg) >>= fun () -> loop s
+    in
+    server_s () >>= fun s ->
+    loop s
+
+let echo_server port =
+  serve_ssl port @@ fun (ic, oc) _addr ->
+    yap ~tag:"handler" "accepted" >>= fun () ->
+    let out = "HTTP/1.1 404 Not Found\r\n\r\n" in
+    Lwt_io.write_from_string_exactly oc out 0 (String.length out) >>= fun () ->
+    (*    Lwt_io.close oc *)
+    let rec loop () =
+      Lwt_io.read_line ic >>= fun line ->
+      yap ~tag:"handler" ("+ " ^ line) >>= fun () ->
+      loop ()
+    in
+    loop ()
+
+let jump _ port =
+  Lwt_main.run (echo_server port)
+
+open Cmdliner
+
+let port =
+  let doc = "Port to connect to" in
+  Arg.(value & opt int 4433 & info [ "port" ] ~doc)
+
+let cmd =
+  let term = Term.(ret (const jump $ setup_log $ port))
+  and info = Cmd.info "fuzz_server" ~version:"2.0.3"
+  in
+  Cmd.v info term
+
+let () = exit (Cmd.eval cmd)

unikernel/duniverse/ocaml-tls/lwt/examples/http_client.ml

@@ -0,0 +1,29 @@
+
+open Lwt
+open Ex_common
+
+let http_client ?ca ?fp hostname port =
+  let port          = int_of_string port in
+  auth ?ca ?fp () >>= fun authenticator ->
+  Tls_lwt.connect_ext
+    (get_ok (Tls.Config.client ~authenticator ()))
+    (hostname, port) >>= fun (ic, oc) ->
+  let req = String.concat "\r\n" [
+    "GET / HTTP/1.1" ; "Host: " ^ hostname ; "Connection: close" ; "" ; ""
+  ] in
+  Lwt_io.(write oc req >>= fun () -> read ic >>= print >>= fun () -> printf "++ done.\n%!")
+
+let () =
+  try
+    match Sys.argv with
+    | [| _ ; host ; port ; "FP" ; fp |] -> Lwt_main.run (http_client host port ~fp)
+    | [| _ ; host ; port ; trust |] -> Lwt_main.run (http_client host port ~ca:trust)
+    | [| _ ; host ; port |]         -> Lwt_main.run (http_client host port)
+    | [| _ ; host |]                -> Lwt_main.run (http_client host "443")
+    | args                          -> Printf.eprintf "%s <host> <port>\n%!" args.(0)
+  with
+  | Tls_lwt.Tls_alert alert as exn ->
+      print_alert "remote end" alert ; raise exn
+  | Tls_lwt.Tls_failure fail as exn ->
+      print_fail "our end" fail ; raise exn
+

unikernel/duniverse/ocaml-tls/lwt/examples/resume_client.ml

@@ -0,0 +1,39 @@
+
+open Lwt
+open Ex_common
+
+let http_client ?ca ?fp hostname port =
+  let port          = int_of_string port in
+  auth ?ca ?fp () >>= fun authenticator ->
+  let config = get_ok (Tls.Config.client ~authenticator ()) in
+  Tls_lwt.Unix.connect config (hostname, port) >>= fun t ->
+  Tls_lwt.Unix.write t "foo\n" >>= fun () ->
+  let cs = Bytes.create 4 in
+  Tls_lwt.Unix.read t cs >>= fun _len ->
+  let cached_session = match Tls_lwt.Unix.epoch t with
+    | Ok e -> e
+    | Error () -> invalid_arg "error retrieving epoch"
+  in
+  Tls_lwt.Unix.close t >>= fun () ->
+  Printf.printf "closed session\n" ;
+  let config = get_ok (Tls.Config.client ~authenticator ~cached_session ()) in
+  Tls_lwt.connect_ext config (hostname, port) >>= fun (ic, oc) ->
+  let req = String.concat "\r\n" [
+    "GET / HTTP/1.1" ; "Host: " ^ hostname ; "Connection: close" ; "" ; ""
+  ] in
+  Lwt_io.(write oc req >>= fun () -> read ic >>= print >>= fun () -> printf "++ done.\n%!")
+
+let () =
+  try
+    match Sys.argv with
+    | [| _ ; host ; port ; "FP" ; fp |] -> Lwt_main.run (http_client host port ~fp)
+    | [| _ ; host ; port ; trust |] -> Lwt_main.run (http_client host port ~ca:trust)
+    | [| _ ; host ; port |]         -> Lwt_main.run (http_client host port)
+    | [| _ ; host |]                -> Lwt_main.run (http_client host "443")
+    | args                          -> Printf.eprintf "%s <host> <port>\n%!" args.(0)
+  with
+  | Tls_lwt.Tls_alert alert as exn ->
+      print_alert "remote end" alert ; raise exn
+  | Tls_lwt.Tls_failure fail as exn ->
+      print_fail "our end" fail ; raise exn
+

unikernel/duniverse/ocaml-tls/lwt/examples/resume_echo_server.ml

@@ -0,0 +1,123 @@
+open Lwt
+open Ex_common
+
+let string_of_unix_err err f p =
+  Printf.sprintf "Unix_error (%s, %s, %s)"
+    (Unix.error_message err) f p
+
+
+module HT = Hashtbl.Make (Tls.Core.PreSharedKeyID)
+let cache_psk, psk_cache =
+  let cache = HT.create 7 in
+  ((fun psk ed -> HT.add cache psk.Tls.Core.identifier (psk, ed)),
+   HT.find_opt cache)
+
+let ticket_cache = {
+  Tls.Config.lookup = psk_cache ;
+  ticket_granted = cache_psk ;
+  lifetime = 300l ;
+  timestamp = Ptime_clock.now
+}
+
+let serve_ssl port callback =
+
+  let tag = "server" in
+
+  X509_lwt.private_of_pems
+    ~cert:server_cert
+    ~priv_key:server_key >>= fun cert ->
+
+  let hex = Ohex.decode in
+  let epoch =
+    {
+      Tls.Core.side = `Client ;
+      state = `Established ;
+      protocol_version = `TLS_1_3 ;
+      ciphersuite = `DHE_RSA_WITH_AES_128_GCM_SHA256 ;
+      peer_random = hex "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f" ;
+      peer_certificate_chain = [] ;
+      peer_certificate = None ;
+      peer_name = None ;
+      trust_anchor = None ;
+      received_certificates = [] ;
+      own_random = hex "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f" ;
+      own_certificate = fst cert ;
+      own_private_key = Some (snd cert) ;
+      own_name = Some Domain_name.(host_exn (of_string_exn "tls13test.nqsb.io")) ;
+      master_secret = hex "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f" ;
+      exporter_master_secret = "" ;
+      session_id = "" ;
+      extended_ms = true ;
+      alpn_protocol = None ;
+      tls_unique = None ;
+    }
+  and psk = {
+    Tls.Core.identifier = hex "0000" ;
+    obfuscation = Randomconv.int32 Mirage_crypto_rng.generate ;
+    secret = hex "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f" ;
+    lifetime = 300l ;
+    early_data = 0l ;
+    issued_at = Ptime_clock.now ();
+  }
+  in
+  cache_psk psk epoch ;
+
+  let server_s () =
+    let open Lwt_unix in
+    let s = socket PF_INET SOCK_STREAM 0 in
+    setsockopt s SO_REUSEADDR true ;
+    bind s (ADDR_INET (Unix.inet_addr_any, port)) >|= fun () ->
+    listen s 10 ;
+    s in
+
+  let handle channels =
+    async @@ fun () ->
+      Lwt.catch (fun () -> callback channels >>= fun () -> yap ~tag "<- handler done")
+        (function
+          | Tls_lwt.Tls_alert a ->
+            yap ~tag @@ "handler: " ^ Tls.Packet.alert_type_to_string a
+          | Tls_lwt.Tls_failure a ->
+            yap ~tag @@ "handler: " ^ Tls.Engine.string_of_failure a
+          | Unix.Unix_error (e, f, p) ->
+            yap ~tag @@ "handler: " ^ (string_of_unix_err e f p)
+          | _exn -> yap ~tag "handler: exception")
+  in
+
+  yap ~tag ("-> start @ " ^ string_of_int port) >>= fun () ->
+  let rec loop s =
+    let authenticator ?ip:_ ~host:_ _ = Ok None in
+    let config = get_ok (Tls.Config.server ~certificates:(`Single cert) ~ticket_cache ~authenticator ()) in
+    (Lwt.catch
+       (fun () ->
+          Lwt_unix.accept s >>= fun (s, addr) ->
+          let txt = Unix.(match addr with
+              | ADDR_UNIX x -> "unix-" ^ x
+              | ADDR_INET (ip, p) -> string_of_inet_addr ip ^ ":" ^ string_of_int p)
+          in
+          yap ~tag:"client-connect" txt >>= fun () ->
+          Tls_lwt.Unix.server_of_fd config s >|= fun t -> `R t)
+       (function
+         | Unix.Unix_error (e, f, p) -> return (`L (string_of_unix_err e f p))
+         | Tls_lwt.Tls_alert a -> return (`L (Tls.Packet.alert_type_to_string a))
+         | Tls_lwt.Tls_failure f -> return (`L (Tls.Engine.string_of_failure f))
+         | exn -> let str = Printexc.to_string exn in return (`L ("loop: exception " ^ str)))) >>= function
+    | `R t ->
+       yap ~tag "-> connect" >>= fun () ->
+       handle (Tls_lwt.of_t t); loop s
+    | `L msg ->
+        yap ~tag ("server socket: " ^ msg) >>= fun () -> loop s
+    in
+    server_s () >>= fun s ->
+    loop s
+
+let echo_server port =
+  serve_ssl port @@ fun (ic, oc) ->
+    lines ic |> Lwt_stream.iter_s (fun line ->
+      yap ~tag:"handler" ("+ " ^ string_of_int (String.length line)) >>= fun () ->
+      Lwt_io.write_line oc line)
+
+let () =
+  let port =
+    try int_of_string Sys.argv.(1) with _ -> 4433
+  in
+  Lwt_main.run (echo_server port)

unikernel/duniverse/ocaml-tls/lwt/examples/starttls_server.ml

@@ -0,0 +1,74 @@
+open Lwt.Infix
+open Ex_common
+
+let capability = "[CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE STARTTLS AUTH=PLAIN] server ready.\r\n"
+
+let ok_starttls = "OK STARTTLS\r\n"
+
+let cert () =
+  X509_lwt.private_of_pems
+  ~cert:"./certificates/server.pem"
+  ~priv_key:"./certificates/server.key"
+
+let init_socket addr port =
+  let sockaddr = Unix.ADDR_INET (Unix.inet_addr_of_string addr, port) in
+  let socket = Lwt_unix.socket Unix.PF_INET Unix.SOCK_STREAM 0 in
+  Lwt_unix.setsockopt socket Unix.SO_REUSEADDR true;
+  Lwt_unix.bind socket sockaddr >|= fun () ->
+  socket
+
+let create_srv_socket addr port =
+  init_socket addr port >|= fun socket ->
+  Lwt_unix.listen socket 10;
+  socket
+
+let accept sock =
+  Lwt_unix.accept sock >>= fun (sock_cl, addr) ->
+  let ic = Lwt_io.of_fd ~close:(fun () -> Lwt.return_unit) ~mode:Lwt_io.input sock_cl in
+  let oc = Lwt_io.of_fd ~close:(fun () -> Lwt.return_unit) ~mode:Lwt_io.output sock_cl in
+  Lwt.return ((ic,oc), addr, sock_cl)
+
+let start_server () =
+  let write oc buff =
+    Lwt_io.write oc buff >>= fun () -> Lwt_io.flush oc
+  in
+  let read ic =
+    Lwt_io.read ic ~count:2048 >>= fun buff ->
+    Printf.printf "%s%!" buff;
+    Lwt.return buff
+  in
+  let parse buff =
+    match String.index buff ' ' with
+    | exception Not_found -> "", ""
+    | idx ->
+      let l = String.length buff in
+      String.sub buff 0 idx, String.sub buff (succ idx) (l - succ idx)
+  in
+  let rec wait_cmd sock_cl ic oc =
+    read ic >>= fun buff ->
+    let tag,cmd = parse buff in
+    match cmd with
+    | "CAPABILITY" ->
+      write oc ("* " ^ capability ^ tag ^ " OK CAPABILITY\r\n") >>= fun () ->
+      wait_cmd sock_cl ic oc
+    | "STARTTLS" ->
+      write oc (tag ^ ok_starttls) >>= fun () ->
+      Lwt_io.close ic >>= fun () ->
+      Lwt_io.close oc >>= fun () ->
+      cert () >>= fun cert ->
+      Tls_lwt.Unix.server_of_fd
+        (get_ok (Tls.Config.server ~certificates:(`Single cert) ())) sock_cl >>= fun s ->
+      let ic,oc = Tls_lwt.of_t s in
+      write oc ("* OK " ^ capability) >>= fun () ->
+      wait_cmd sock_cl ic oc
+    | _ ->
+      write oc ("BAD\r\n") >>= fun () ->
+      wait_cmd sock_cl ic oc
+  in
+  create_srv_socket "127.0.0.1" 143 >>= fun sock ->
+  accept sock >>= fun ((ic,oc), _addr, sock_cl) ->
+  write oc ("* OK " ^ capability) >>= fun () ->
+  wait_cmd sock_cl ic oc
+
+let () =
+  Lwt_main.run (start_server ())

unikernel/duniverse/ocaml-tls/lwt/examples/test_client.ml

@@ -0,0 +1,49 @@
+open Lwt
+open Ex_common
+
+let mypsk = ref None
+
+let ticket_cache = {
+  Tls.Config.lookup = (fun _ -> None) ;
+  ticket_granted = (fun psk epoch -> mypsk := Some (psk, epoch)) ;
+  lifetime = 0l ;
+  timestamp = Ptime_clock.now
+}
+
+let test_client _ =
+(*  X509_lwt.private_of_pems
+    ~cert:server_cert
+    ~priv_key:server_key >>= fun cert -> *)
+  let port = 4433 in
+  let host = "127.0.0.1" in
+  let authenticator = null_auth in
+  Tls_lwt.Unix.connect
+    (get_ok Tls.Config.(client ~version:(`TLS_1_0, `TLS_1_3) (* ~certificates:(`Single cert) *) ?cached_ticket:!mypsk ~ticket_cache ~authenticator ~ciphers:Ciphers.supported ()))
+    (host, port) >>= fun t ->
+  let (ic, oc) = Tls_lwt.of_t t in
+  let req = String.concat "\r\n" [
+    "GET / HTTP/1.1" ; "Host: " ^ host ; "Connection: close" ; "" ; ""
+  ] in
+  Lwt_io.(write oc req >>= fun () ->
+          read ~count:3 ic >>= print >>= fun () ->
+          close oc >>= fun () ->
+          printf "++ done.\n%!")
+
+let jump _ =
+  try
+    Lwt_main.run (test_client ()) ; `Ok ()
+  with
+  | Tls_lwt.Tls_alert alert as exn ->
+      print_alert "remote end" alert ; raise exn
+  | Tls_lwt.Tls_failure alert as exn ->
+      print_fail "our end" alert ; raise exn
+
+open Cmdliner
+
+let cmd =
+  let term = Term.(ret (const jump $ setup_log))
+  and info = Cmd.info "test_client" ~version:"2.0.3"
+  in
+  Cmd.v info term
+
+let () = exit (Cmd.eval cmd)

unikernel/duniverse/ocaml-tls/lwt/examples/test_server.ml

@@ -0,0 +1,47 @@
+
+open Lwt
+open Ex_common
+
+let serve_ssl port callback =
+
+  let tag = "server" in
+
+  X509_lwt.private_of_pems
+    ~cert:server_cert
+    ~priv_key:server_key >>= fun certificate ->
+  X509_lwt.private_of_pems
+    ~cert:server_ec_cert
+    ~priv_key:server_ec_key >>= fun ec_certificate ->
+  let certificates = `Multiple [ certificate ; ec_certificate ] in
+  let config =
+    get_ok (Tls.Config.(server ~version:(`TLS_1_0, `TLS_1_3) ~certificates ~ciphers:Ciphers.supported ()))
+  in
+
+  let server_s =
+    let open Lwt_unix in
+    let s = socket PF_INET SOCK_STREAM 0 in
+    setsockopt s Unix.SO_REUSEADDR true ;
+    bind s (ADDR_INET (Unix.inet_addr_any, port)) >|= fun () ->
+    listen s 10 ;
+    s in
+
+  yap ~tag ("-> start @ " ^ string_of_int port) >>= fun () ->
+  server_s >>= fun s ->
+  Tls_lwt.Unix.accept config s >>= fun (t, addr) ->
+  let channels = Tls_lwt.of_t t in
+  yap ~tag "-> connect" >>= fun () ->
+  callback channels addr >>= fun () ->
+  yap ~tag "<- handler done"
+
+let test_server port =
+  serve_ssl port @@ fun (ic, oc) _addr ->
+    yap ~tag:"handler" "accepted" >>= fun () ->
+    Lwt_io.read_line ic >>= fun line ->
+    yap ~tag:"handler" ("+ " ^ line) >>= fun () ->
+    Lwt_io.write_line oc line
+
+let () =
+  let port =
+    try int_of_string Sys.argv.(1) with _ -> 4433
+  in
+  Lwt_main.run (test_server port)

unikernel/duniverse/ocaml-tls/lwt/examples/tls_over_tls.ml

@@ -0,0 +1,70 @@
+open Lwt
+open Ex_common
+
+let hostname = "mirage.io"
+
+let proxy = "127.0.0.1", 3129
+
+(* To test TLS-over-TLS, the `squid` proxy can be installed locally and configured to support HTTPS:
+
+- Generate a certificate for localhost: https://gist.github.com/cecilemuller/9492b848eb8fe46d462abeb26656c4f8
+
+$ openssl req -x509 -nodes -new -sha256 -days 1024 -newkey rsa:2048 -keyout RootCA.key -out RootCA.pem -subj "/C=US/CN=Example-Root-CA"
+$ openssl x509 -outform pem -in RootCA.pem -out RootCA.crt
+$ cat <<EOF > domains.ext
+authorityKeyIdentifier=keyid,issuer
+basicConstraints=CA:FALSE
+keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment
+subjectAltName = @alt_names
+[alt_names]
+DNS.1 = localhost
+EOF
+$ openssl req -new -nodes -newkey rsa:2048 -keyout localhost.key -out localhost.csr -subj "/C=US/ST=YourState/L=YourCity/O=Example-Certificates/CN=localhost.local"
+$ openssl x509 -req -sha256 -days 1024 -in localhost.csr -CA RootCA.pem -CAkey RootCA.key -CAcreateserial -extfile domains.ext -out localhost.crt
+
+- Configure squid by adding HTTPS support on port 3129 in /etc/squid/squid.conf :
+
+https_port 3129 tls-cert=/path/to/localhost.crt tls-key=/path/to/localhost.key
+
+*)
+
+let client = get_ok (Tls.Config.client ~authenticator:null_auth ())
+
+let string_prefix ~prefix msg =
+  let len = String.length prefix in
+  String.length msg >= len && String.sub msg 0 len = prefix
+
+let host = Result.get_ok (Domain_name.of_string hostname)
+let host = Result.get_ok (Domain_name.host host)
+
+let test_client _ =
+  (* Connect to proxy *)
+  Tls_lwt.Unix.connect client proxy >>= fun t ->
+  let (ic, oc) = Tls_lwt.of_t t in
+
+  (* Request proxy to connect to hostname *)
+  let req =
+    Printf.sprintf "CONNECT %s:443 HTTP/1.1\r\nHost: %s\r\n\r\n"
+      hostname hostname
+  in
+  Lwt_io.write oc req >>= fun () ->
+  Lwt_io.read ic ~count:1024 >>= fun msg ->
+  assert (string_prefix ~prefix:"HTTP/1.1 200 " msg) ;
+
+  (* TLS with hostname, over the TLS connection with the proxy *)
+  Tls_lwt.Unix.client_of_channels client ~host (ic, oc) >>= fun t ->
+  let (ic, oc) = Tls_lwt.of_t t in
+
+  (* Request homepage from host *)
+  let req =
+    Printf.sprintf "GET / HTTP/1.1\r\nHost: %s\r\nConnection: close\r\n\r\n"
+      hostname
+  in
+
+  Lwt_io.(write oc req >>= fun () ->
+          read ~count:1024 ic >>= print >>= fun () ->
+          read ~count:1024 ic >>= print >>= fun () ->
+          close oc >>= fun () ->
+          printf "++ done.\n%!")
+
+let () = Lwt_main.run (test_client ())