ssh: Implement authentication for new ssh server

cmd/ssh.go

@@ -0,0 +1,54 @@
+package cmd
+
+import (
+	wisski_distillery "github.com/FAU-CDI/wisski-distillery"
+	"github.com/FAU-CDI/wisski-distillery/internal/cli"
+	"github.com/tkw1536/goprogram/exit"
+)
+
+// SSH is the 'ssh' command
+var SSH wisski_distillery.Command = ssh{}
+
+type ssh struct {
+	Bind string `short:"b" long:"bind" description:"address to listen on" default:"127.0.0.1:2223"`
+}
+
+func (s ssh) Description() wisski_distillery.Description {
+	return wisski_distillery.Description{
+		Requirements: cli.Requirements{
+			NeedsDistillery: true,
+		},
+		Command:     "ssh",
+		Description: "Starts the ssh server to allow clients to connect to this distillery",
+	}
+}
+
+var errSSHListen = exit.Error{
+	ExitCode: exit.ExitGeneric,
+	Message:  "Unable to listen",
+}
+
+func (s ssh) Run(context wisski_distillery.Context) error {
+	dis := context.Environment
+	server, err := dis.SSH().Server(dis.Context(), context.IOStream)
+	if err != nil {
+		return err
+	}
+
+	context.Printf("Listening on %s\n", s.Bind)
+
+	// make a new listener
+	listener, err := dis.Still.Environment.Listen("tcp", s.Bind)
+	if err != nil {
+		return errServerListen.Wrap(err)
+	}
+
+	go func() {
+		<-dis.Context().Done()
+		listener.Close()
+	}()
+
+	// and serve that listener
+	err = server.Serve(listener)
+	return errServerListen.Wrap(err)
+}