Forward ssh2 ports into docker

internal/dis/component/ssh2/server.go

@@ -0,0 +1,38 @@
+package ssh2
+
+import (
+	"context"
+
+	"github.com/gliderlabs/ssh"
+	"github.com/tkw1536/goprogram/stream"
+)
+
+const (
+	etx rune = 3
+	eot rune = 4
+)
+
+const welcomeMessage = `Welcome to the WissKI SSH Server.
+You've successfully authenticated, but we don't provide shell access to the main server.
+You may use this connection as part of a proxy jump to connect to your server.
+For example: 
+
+ssh -J %s:2222 www-data@%s
+
+Press CTRL-C to close this connection.
+`
+
+// Server returns an ssh server that implements the main ssh server
+func (ssh2 *SSH2) Server(context context.Context, privateKeyPath string, io stream.IOStream) (*ssh.Server, error) {
+	var server ssh.Server
+
+	if err := ssh2.setupHostKeys(io, privateKeyPath, &server); err != nil {
+		return nil, err
+	}
+
+	ssh2.setupForwardHandler(&server)
+	ssh2.setupHandler(&server)
+	ssh2.setupAuth(&server)
+
+	return &server, nil
+}