From 15f6def3e05ecc9a7ead74f43dce99b63dfc5574 Mon Sep 17 00:00:00 2001
From: traumschule <tsr@riseup.net>
Date: Sun, 24 Mar 2019 19:37:28 -0700
Subject: [PATCH] nats-ssh-bridge.go

---
 nats-ssh.go | 177 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 177 insertions(+)
 create mode 100644 nats-ssh.go

diff --git a/nats-ssh.go b/nats-ssh.go
new file mode 100644
index 0000000..a68abab
--- /dev/null
+++ b/nats-ssh.go
@@ -0,0 +1,177 @@
+package main
+
+import (
+	// nats client
+	"bufio"
+	"fmt"
+	"os"
+	"time"
+
+	nats "github.com/nats-io/go-nats"
+
+	// ssh
+//	"errors"
+//	"net"
+	"golang.org/x/crypto/ssh"
+)
+
+/* motivation
+TLDR ssh <> ssh-chat-server <> [ssh-client & nats-client] <> nats-server
+TLDR: ssh.in < nats.out ssh.out > nats.in :s
+
+<ts> add an ssh server to nats-client :p <-- i really want to do this
+<ts> not sure if everyone needs to run a ssh
+<ron> uh? in that case no everyone would have to run nats-client..
+<ts> sounds like the ricochet or cwtch where everyone runs an onion service
+<ron> they would connect to nats-client over ssh
+<ts> the idea was to let everyone connect to gnats via ssh over ssh-chat, right?
+<ron> what you mean gnats? the nats server?
+<ts> it's the nats server that runs on serge
+<ron> its a nats server not an ssh server :s
+<ts> right. so your idea was to add the ssh-server to the nats client instead? <ron> yes
+<ts> who would connect to it? <ron> users like in ssh-chat
+<ts> and it would be forwarded via nats?
+<ron> the users ssh session stdin input would be published like the normal stdin is now
+<ron> and received messages would be printed on all ssh user sessions tty
+<ron> stdout .. hm no.. tty.. not stdout ;)
+<ron> and for example another fork of nats-client could have a webserver
+<ron> then user from browser can talk to ssh user
+<ts> i want to be able to send messages to everyone's stderr! */
+
+func main() {
+	server := "gam4soeb3t5f56fs.onion"
+	user := "test"
+
+	// connect to ssh server
+	//https://github.com/inatus/ssh-client-go/blob/master/main.go#L35
+	// https://github.com/shazow/ssh-chat/blob/master/sshd/client_test.go
+	config := &ssh.ClientConfig{
+		User: user,
+		Auth: []ssh.AuthMethod{
+		 	ssh.KeyboardInteractive(func(user, instruction string,
+		 		questions []string, echos []bool) (answers []string, err error) {
+		 		return
+		 	}),
+		},
+		HostKeyCallback: ssh.InsecureIgnoreHostKey(),
+	}
+	conn, err := ssh.Dial("tcp", server+":2022", config)
+	if err != nil {
+		panic("Failed to dial: " + err.Error())
+	}
+	defer conn.Close()
+
+	// Each ClientConn can support multiple interactive sessions,
+	// represented by a Session.
+	session, err := conn.NewSession()
+	if err != nil {
+		panic("Failed to create session: " + err.Error())
+	}
+	defer session.Close()
+
+	// Set IO
+	session.Stdout = os.Stdout
+	session.Stderr = os.Stderr
+//	session.Stdin = os.Stdin
+	in, _ := session.StdinPipe()
+
+	// Set up terminal modes
+	modes := ssh.TerminalModes{
+		ssh.ECHO:          1,     // disable echoing
+		ssh.TTY_OP_ISPEED: 14400, // input speed = 14.4kbaud
+		ssh.TTY_OP_OSPEED: 14400, // output speed = 14.4kbaud
+	}
+
+	// Request pseudo terminal
+	if err := session.RequestPty("xterm", 80, 40, modes); err != nil {
+		fmt.Printf("request for pseudo terminal failed: %s", err)
+	}
+
+	// Start remote shell
+	if err := session.Shell(); err != nil {
+		fmt.Printf("failed to start shell: %s", err)
+	}
+
+	//  no it copy reader to writer using the buffer
+	// you shouldnt use a buffer
+	/// or your input/output is only going to get copied $buffersize bytes at a time https://irc.anarchyplanet.org/git/ron/proxybang/src/master/main.go#L159
+
+	// reader := bufio.NewReader(resp.Body)
+	// 	if _, err := io.CopyBuffer(w, reader, buf); err != nil {
+	// 		if err == io.EOF {
+	// 			log.Println("eof")
+	// 		} else {
+	// 			log.Println(err)
+	// 		}
+	// 	}
+
+	answer, err := session.SendRequest("ping", true, nil)
+	if err != nil { fmt.Println("dammit")
+	}
+	fmt.Println(answer)
+
+	// Accepting commands
+	// TODO needs to be forked
+	// you can do that with channels using the select keyword
+	// go func(){}()
+	for {
+		reader := bufio.NewReader(os.Stdin)
+		str, _ := reader.ReadString('\n')
+		session.Run(str)
+		fmt.Fprint(in, str) // ssh-chat prob gives no real shell
+	}
+
+
+
+
+
+
+
+	// connect to nats server
+	opts := []nats.Option{
+		nats.ReconnectWait(time.Second),
+		nats.MaxReconnects(-1),
+		nats.DisconnectHandler(disconnectHandler),
+		nats.ReconnectHandler(reconnectHandler),
+		nats.ClosedHandler(closedHandler),
+	}
+
+	nc, err := nats.Connect(server, opts...)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	nc.Subscribe("chat", func(msg *nats.Msg) {
+		fmt.Println(string(msg.Data))
+		fmt.Print("> ")
+	})
+	nc.Flush()
+
+	err = nc.LastError()
+	if err != nil {
+		fmt.Print(err)
+		os.Exit(1)
+	}
+
+	reader := bufio.NewReader(os.Stdin)
+	for {
+		fmt.Print("> ")
+		text, _ := reader.ReadString('\n')
+		nc.Publish("chat", []byte(text))
+	}
+
+	os.Exit(1)
+}
+
+func disconnectHandler(nc *nats.Conn) {
+	fmt.Println("disconnected")
+}
+
+func reconnectHandler(nc *nats.Conn) {
+	fmt.Println("reconnected")
+}
+
+func closedHandler(nc *nats.Conn) {
+	fmt.Println("closed")
+}