78 lines
2.9 KiB
OCaml
78 lines
2.9 KiB
OCaml
(* (c) 2017 Hannes Mehnert, all rights reserved *)
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open Lwt.Infix
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let version = `AV3
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let rec read_tls_write_cons t =
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Vmm_tls_lwt.read_tls t >>= function
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| Error _ -> Lwt.return_unit
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| Ok wire ->
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Albatross_cli.print_result version wire ;
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read_tls_write_cons t
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let client cas host port cert priv_key =
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Nocrypto_entropy_lwt.initialize () >>= fun () ->
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let auth = if Sys.is_directory cas then `Ca_dir cas else `Ca_file cas in
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X509_lwt.authenticator auth >>= fun authenticator ->
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Lwt.catch (fun () ->
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(* TODO TLS certificate verification and gethostbyname:
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- allow IP address and hostname
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- if IP is specified, use it (and no TLS name verification - or SubjAltName with IP?)
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- if hostname is specified
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- no ip: gethostbyname
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- ip: connecto to ip and verify hostname *)
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Lwt_unix.gethostbyname host >>= fun host_entry ->
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let host_inet_addr = Array.get host_entry.Lwt_unix.h_addr_list 0 in
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let fd = Lwt_unix.socket host_entry.Lwt_unix.h_addrtype Lwt_unix.SOCK_STREAM 0 in
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Lwt_unix.connect fd (Lwt_unix.ADDR_INET (host_inet_addr, port)) >>= fun _ ->
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X509_lwt.private_of_pems ~cert ~priv_key >>= fun cert ->
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let certificates = `Single cert in
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let client = Tls.Config.client ~reneg:true ~certificates ~authenticator () in
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Tls_lwt.Unix.client_of_fd client (* ~host *) fd >>= fun t ->
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read_tls_write_cons t)
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(fun exn ->
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Logs.err (fun m -> m "failed to establish TLS connection: %s"
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(Printexc.to_string exn)) ;
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Lwt.return_unit)
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let run_client _ cas cert key (host, port) =
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Printexc.register_printer (function
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| Tls_lwt.Tls_alert x -> Some ("TLS alert: " ^ Tls.Packet.alert_type_to_string x)
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| Tls_lwt.Tls_failure f -> Some ("TLS failure: " ^ Tls.Engine.string_of_failure f)
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| _ -> None) ;
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Sys.(set_signal sigpipe Signal_ignore) ;
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Lwt_main.run (client cas host port cert key)
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open Cmdliner
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open Albatross_cli
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let cas =
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let doc = "The full path to PEM encoded certificate authorities. Can either be a FILE or a DIRECTORY." in
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Arg.(required & pos 0 (some string) None & info [] ~doc ~docv:"CA")
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let client_cert =
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let doc = "Use a client certificate chain" in
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Arg.(required & pos 1 (some file) None & info [] ~doc ~docv:"CERT")
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let client_key =
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let doc = "Use a client key" in
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Arg.(required & pos 2 (some file) None & info [] ~doc ~docv:"KEY")
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let destination =
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let doc = "the destination hostname:port to connect to" in
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Arg.(required & pos 3 (some host_port) None & info [] ~docv:"HOST:PORT" ~doc)
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let cmd =
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let doc = "Albatross remote TLS client" in
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let man = [
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`S "DESCRIPTION" ;
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`P "$(tname) connects to an Albatross server and initiates a TLS handshake" ]
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in
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Term.(pure run_client $ setup_log $ cas $ client_cert $ client_key $ destination),
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Term.info "albatross_client_remote_tls" ~version:"%%VERSION_NUM%%" ~doc ~man
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let () =
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match Term.eval cmd
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with `Error _ -> exit 1 | _ -> exit 0
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