diff options
Diffstat (limited to 'termshare')
| -rw-r--r-- | termshare/.gitignore | 1 | ||||
| -rw-r--r-- | termshare/README.md | 32 | ||||
| -rw-r--r-- | termshare/cmd/daemon.go | 25 | ||||
| -rw-r--r-- | termshare/cmd/root.go | 16 | ||||
| -rw-r--r-- | termshare/cmd/version.go | 24 | ||||
| -rw-r--r-- | termshare/go.mod | 11 | ||||
| -rw-r--r-- | termshare/go.sum | 295 | ||||
| -rw-r--r-- | termshare/internal/client.go_ | 86 | ||||
| -rw-r--r-- | termshare/internal/daemon/daemon.go | 56 | ||||
| -rw-r--r-- | termshare/internal/forwarder.go_ | 37 | ||||
| -rw-r--r-- | termshare/main.go | 64 |
11 files changed, 647 insertions, 0 deletions
diff --git a/termshare/.gitignore b/termshare/.gitignore new file mode 100644 index 0000000..23034d9 --- /dev/null +++ b/termshare/.gitignore @@ -0,0 +1 @@ +termshare diff --git a/termshare/README.md b/termshare/README.md new file mode 100644 index 0000000..9d62c0a --- /dev/null +++ b/termshare/README.md @@ -0,0 +1,32 @@ +# Server + +Simple server works and can give us a bash session + +# Remote forward + +```bash +# Server +python -m http.server 8001 +./termshare +# Attempt to bind to localhost 8000 granted + +# Client +ssh -R 8000:localhost:8001 root@127.0.0.1 -p 2222 +curl 127.0.0.1:8000 +# See the python listing + + +# Build +go build +``` + +# Todo: + +- Build a very small client that can connect to the host + + +# Fixed: + +- Importing the function from the internal library is not working + * exported names need to start with a Captial +- How to pass arguments to command function? diff --git a/termshare/cmd/daemon.go b/termshare/cmd/daemon.go new file mode 100644 index 0000000..3ae3f39 --- /dev/null +++ b/termshare/cmd/daemon.go @@ -0,0 +1,25 @@ +package cmd + +import ( + "termshare/internal/daemon" + + "github.com/spf13/cobra" +) + +var ( + flagPort string +) + +func init() { + cmd := &cobra.Command{ + Use: "daemon", + Short: "Run the daemon command", + Long: "run the daemon command", + Run: func(cmd *cobra.Command, args []string) { + daemon.RunDaemon(flagPort) + }, + } + cmd.PersistentFlags().StringVarP(&flagPort, "port", "", "8080", "The port the daemon should listen to") + rootCmd.AddCommand(cmd) +} + diff --git a/termshare/cmd/root.go b/termshare/cmd/root.go new file mode 100644 index 0000000..848dac7 --- /dev/null +++ b/termshare/cmd/root.go @@ -0,0 +1,16 @@ +package cmd + +import ( + "github.com/spf13/cobra" +) + +var rootCmd = &cobra.Command{ + Use: "Termshare", + Short: "A terminal sharing application", + Long: "A super fun time application to share terminals", +} + +// Execute executes the root command. +func Execute() error { + return rootCmd.Execute() +} diff --git a/termshare/cmd/version.go b/termshare/cmd/version.go new file mode 100644 index 0000000..bc529cc --- /dev/null +++ b/termshare/cmd/version.go @@ -0,0 +1,24 @@ +package cmd + +import ( + "fmt" + + "github.com/spf13/cobra" +) + +func init() { + rootCmd.AddCommand(versionCmd) +} + +func run(cmd *cobra.Command, args []string) { + fmt.Println("0.0.1") +} + +var versionCmd = &cobra.Command{ + Use: "version", + Short: "Print the version of termshare", + Long: "This is the version of the termshare command", + Run: func(cmd *cobra.Command, args []string) { + fmt.Println("0.0.1") + }, +} diff --git a/termshare/go.mod b/termshare/go.mod new file mode 100644 index 0000000..ccb4c3e --- /dev/null +++ b/termshare/go.mod @@ -0,0 +1,11 @@ +module termshare + +go 1.15 + +require ( + github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be // indirect + github.com/creack/pty v1.1.11 + github.com/gliderlabs/ssh v0.3.2 + github.com/spf13/cobra v1.1.3 + golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83 +) diff --git a/termshare/go.sum b/termshare/go.sum new file mode 100644 index 0000000..a5bb578 --- /dev/null +++ b/termshare/go.sum @@ -0,0 +1,295 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= +cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= +cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0= +cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o= +cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE= 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v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= +rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8= diff --git a/termshare/internal/client.go_ b/termshare/internal/client.go_ new file mode 100644 index 0000000..1845a15 --- /dev/null +++ b/termshare/internal/client.go_ @@ -0,0 +1,86 @@ +package main + +import ( + "fmt" + "golang.org/x/crypto/ssh" + "log" + "os" + // Uncomment to store output in variable + //"bytes" +) + +func main() { + + username := "root" + password := "" + hostname := "127.0.0.1" + port := "2222" + + // SSH client config + config := &ssh.ClientConfig{ + User: username, + Auth: []ssh.AuthMethod{ + ssh.Password(password), + }, + // Non-production only + HostKeyCallback: ssh.InsecureIgnoreHostKey(), + } + + // Connect to host + client, err := ssh.Dial("tcp", hostname+":"+port, config) + if err != nil { + log.Fatal(err) + } + defer client.Close() + + // Create sesssion + sess, err := client.NewSession() + if err != nil { + log.Fatal("Failed to create session: ", err) + } + defer sess.Close() + + // StdinPipe for commands + stdin, err := sess.StdinPipe() + if err != nil { + log.Fatal(err) + } + + // Uncomment to store output in variable + //var b bytes.Buffer + //sess.Stdout = &b + //sess.Stderr = &b + + // Enable system stdout + // Comment these if you uncomment to store in variable + sess.Stdout = os.Stdout + sess.Stderr = os.Stderr + + // Start remote shell + err = sess.Shell() + if err != nil { + log.Fatal(err) + } + + // send the commands + commands := []string{ + "whoami", + "exit", + } + for _, cmd := range commands { + _, err = fmt.Fprintf(stdin, "%s\n", cmd) + if err != nil { + log.Fatal(err) + } + } + + // Wait for sess to finish + err = sess.Wait() + if err != nil { + log.Fatal(err) + } + + // Uncomment to store in variable + //fmt.Println(b.String()) + +} diff --git a/termshare/internal/daemon/daemon.go b/termshare/internal/daemon/daemon.go new file mode 100644 index 0000000..465cdff --- /dev/null +++ b/termshare/internal/daemon/daemon.go @@ -0,0 +1,56 @@ +package daemon + +import ( + "fmt" + "bufio" + "io" + "log" + "os" + "os/exec" + "syscall" + "strconv" + "unsafe" + + "github.com/gliderlabs/ssh" + "github.com/creack/pty" +) + +func setWinsize(f *os.File, w, h int) { + syscall.Syscall(syscall.SYS_IOCTL, f.Fd(), uintptr(syscall.TIOCSWINSZ), + uintptr(unsafe.Pointer(&struct{ h, w, x, y uint16 }{uint16(h), uint16(w), 0, 0}))) +} + +func RunDaemon(port string) { + ssh.Handle(func(s ssh.Session) { + cmd := exec.Command("bash") + ptyReq, winCh, isPty := s.Pty() + if isPty { + cmd.Env = append(cmd.Env, fmt.Sprintf("TERM=%s", ptyReq.Term)) + f, err := pty.Start(cmd) + if err != nil { + panic(err) + } + go func() { + for win := range winCh { + setWinsize(f, win.Width, win.Height) + } + }() + go func() { + io.Copy(f, s) // stdin + }() + io.Copy(s, f) // stdout + cmd.Wait() + } else { + io.WriteString(s, "No PTY requested.\n") + reader := bufio.NewReader(s) + for { + input, _, _ := reader.ReadRune() + io.WriteString(os.Stdout, strconv.QuoteRune(input)) + } + s.Exit(1) + } + }) + + log.Println("starting ssh server on port " + port + " ...") + log.Fatal(ssh.ListenAndServe(":" + port, nil)) +} diff --git a/termshare/internal/forwarder.go_ b/termshare/internal/forwarder.go_ new file mode 100644 index 0000000..2ce866f --- /dev/null +++ b/termshare/internal/forwarder.go_ @@ -0,0 +1,37 @@ +package main + +import ( + "io" + "log" + + "github.com/gliderlabs/ssh" +) + +func main() { + + log.Println("starting ssh server on port 2222...") + + forwardHandler := &ssh.ForwardedTCPHandler{} + + server := ssh.Server{ + LocalPortForwardingCallback: ssh.LocalPortForwardingCallback(func(ctx ssh.Context, dhost string, dport uint32) bool { + log.Println("Accepted forward", dhost, dport) + return true + }), + Addr: ":2222", + Handler: ssh.Handler(func(s ssh.Session) { + io.WriteString(s, "Remote forwarding available...\n") + select {} + }), + ReversePortForwardingCallback: ssh.ReversePortForwardingCallback(func(ctx ssh.Context, host string, port uint32) bool { + log.Println("attempt to bind", host, port, "granted") + return true + }), + RequestHandlers: map[string]ssh.RequestHandler{ + "tcpip-forward": forwardHandler.HandleSSHRequest, + "cancel-tcpip-forward": forwardHandler.HandleSSHRequest, + }, + } + + log.Fatal(server.ListenAndServe()) +} diff --git a/termshare/main.go b/termshare/main.go new file mode 100644 index 0000000..600e8b1 --- /dev/null +++ b/termshare/main.go @@ -0,0 +1,64 @@ +package main + +import ( + "termshare/cmd" +) + +func main() { + cmd.Execute() +} + +// import ( +// "fmt" +// "bufio" +// "io" +// "log" +// "os" +// "os/exec" +// "syscall" +// "strconv" +// "unsafe" + +// "github.com/gliderlabs/ssh" +// "github.com/creack/pty" +// ) + +// func setWinsize(f *os.File, w, h int) { +// syscall.Syscall(syscall.SYS_IOCTL, f.Fd(), uintptr(syscall.TIOCSWINSZ), +// uintptr(unsafe.Pointer(&struct{ h, w, x, y uint16 }{uint16(h), uint16(w), 0, 0}))) +// } + +// func main() { +// ssh.Handle(func(s ssh.Session) { +// cmd := exec.Command("bash") +// ptyReq, winCh, isPty := s.Pty() +// if isPty { +// cmd.Env = append(cmd.Env, fmt.Sprintf("TERM=%s", ptyReq.Term)) +// f, err := pty.Start(cmd) +// if err != nil { +// panic(err) +// } +// go func() { +// for win := range winCh { +// setWinsize(f, win.Width, win.Height) +// } +// }() +// go func() { +// io.Copy(f, s) // stdin +// }() +// io.Copy(s, f) // stdout +// cmd.Wait() +// } else { +// io.WriteString(s, "No PTY requested.\n") +// reader := bufio.NewReader(s) +// for { +// input, _, _ := reader.ReadRune() +// io.WriteString(os.Stdout, strconv.QuoteRune(input)) +// } +// s.Exit(1) +// } +// }) + +// log.Println("starting ssh server on port 2222...") +// log.Fatal(ssh.ListenAndServe(":2222", nil)) +// } |