Golang SSH Connection switch

This is a creation in Article, where the information may have evolved or changed.

/* Switch sshusername Cisco password CISCOIP domain name hupucrypto key generate Rsaip ssh time-out 30line vty 0 4transpor T input alllogin local*/package mainimport ("FMT" "io" "Log" "OS" "Strings" "Sync") Import ("Golang.org/x/crypto/ssh") func Main () {config: = &ssh. Clientconfig{user: "Cisco", Auth: []ssh. Authmethod{ssh. Password ("Cisco"),},config:ssh. Config{ciphers: []string{"AES128-CBC"},},}//config. config.ciphers = append (config. Config.ciphers, "AES128-CBC") clinet, err: = ssh. Dial ("TCP", "192.168.1.253:22", config) checkerror (err, "connection switch") session, Err: = Clinet. NewSession () Defer session. Close () checkerror (err, "create Shell") modes: = SSH. Terminalmodes{ssh. Echo:1,//disable ECHOINGSSH. tty_op_ispeed:14400,//input speed = 14.4kbaudssh. tty_op_ospeed:14400,//output Speed = 14.4kbaud}if ERR: = Session. Requestpty ("VT100", modes); Err! = Nil {log. Fatal (Err)}w, err: = Session. Stdinpipe () if err! = Nil {panic (err)}r, err: = Session. Stdoutpipe () if err! = Nil {panic (err)}e,ERR: = Session. Stderrpipe () if err! = Nil {panic (err)}in, out: = Muxshell (W, R, E) If err: = Session. Shell (); Err! = Nil {log. Fatal (Err)}<-out//ignore the shell Outputin <-' show arp ' in <-' show int status ' in <-' exit ' in <-' exit ' FM t.printf ("%s\n%s\n", <-out, <-out) _, _ = <-out, <-outsession. Wait ()}func checkerror (err error, info string) {if err! = Nil {fmt. Printf ("%s. Error:%s\n", info, err) os. Exit (1)}}func Muxshell (w io. Writer, R, E io. Reader) (chan<-string, <-chan string) {in: = Do (chan string, 3) Out: = Make (Chan string, 5) var wg sync. Waitgroupwg.add (1)//for the Shell Itselfgo func () {for cmd: = range in {WG. ADD (1) w.write ([]byte (cmd + "\ n")) WG. Wait ()}} () go func () {var (buf [$ * 1024]bytet int) for {n, err: = R.read (buf[t:]) if err! = Nil {fmt. Println (Err. Error ()) close (in) close (out) return}t + = Nresult: = String (Buf[:t]) if strings. Contains (Result, "Username:") | | Strings. Contains (Result, "Password:") | | Strings. Contains (Result, "#") {out <-StrinG (Buf[:t]) T = 0WG. Done ()}}} () return in, out}