Golang Dial Examples

Example #1

File: ssh.go Project: rprp/mssh

//cmd as shell command need absolute path
func SshRun(hostaddr, username, password, cmd string) (rst string, err error) {
	var auths []ssh.AuthMethod
	var keypath []string
	userentry, err := user.Lookup(username)
	if err != nil {
		return err.Error(), err
	}

	keyRSA := fmt.Sprintf("%s/.ssh/id_rsa", userentry.HomeDir)
	keyDSA := fmt.Sprintf("%s/.ssh/id_dsa", userentry.HomeDir)
	keypath = append(keypath, keyRSA, keyDSA)

	k := new(keychain)
	k.loadPEM(keyRSA)
	k.loadPEM(keyDSA)

	auths = append(auths, ssh.PublicKeys(k.keys...), ssh.Password(password))

	config := &ssh.ClientConfig{
		User: username,
		Auth: auths,
	}

	if !strings.Contains(hostaddr, ":") {
		hostaddr = hostaddr + ":22"
	}

	client, err := ssh.Dial("tcp", hostaddr, config)
	if err != nil {
		return err.Error(), err
	}
	defer client.Close()

	session, err := client.NewSession()
	if err != nil {
		return err.Error(), err
	}
	defer session.Close()

	modes := ssh.TerminalModes{
		ECHO:          0,     // disable echoing
		TTY_OP_ISPEED: 14400, // input speed = 14.4kbaud
		TTY_OP_OSPEED: 14400, // output speed = 14.4kbaud
	}

	if err = session.RequestPty("xterm", 80, 40, modes); err != nil {
		return err.Error(), err
	}

	var bstderr bytes.Buffer
	var bstdout bytes.Buffer
	session.Stderr = &bstderr
	session.Stdout = &bstdout

	if err := session.Run(cmd); err != nil {
		return bstderr.String(), err
	}

	return bstdout.String(), nil
}

Example #2

File: ssh.go Project: rprp/mssh

//support ssh timeout
func sshExec(hostaddr, username, password, cmd string, ch chan Results) {
	var auths []ssh.AuthMethod
	var keypath []string
	userentry, err := user.Lookup(username)
	if err != nil {
		ch <- Results{err: err, stderr: err.Error()}
		return
	}

	keyRSA := fmt.Sprintf("%s/.ssh/id_rsa", userentry.HomeDir)
	keyDSA := fmt.Sprintf("%s/.ssh/id_dsa", userentry.HomeDir)
	keypath = append(keypath, keyRSA, keyDSA)

	k := new(keychain)
	k.loadPEM(keyRSA)
	k.loadPEM(keyDSA)

	auths = append(auths, ssh.PublicKeys(k.keys...), ssh.Password(password))

	config := &ssh.ClientConfig{
		User: username,
		Auth: auths,
	}

	if !strings.Contains(hostaddr, ":") {
		hostaddr = hostaddr + ":22"
	}

	client, err := ssh.Dial("tcp", hostaddr, config)
	if err != nil {
		ch <- Results{err: err, stderr: err.Error()}
		return
	}
	defer client.Close()

	session, err := client.NewSession()
	if err != nil {
		ch <- Results{err: err, stderr: err.Error()}
		return
	}
	defer session.Close()

	modes := ssh.TerminalModes{
		ECHO:          0,     // disable echoing
		TTY_OP_ISPEED: 14400, // input speed = 14.4kbaud
		TTY_OP_OSPEED: 14400, // output speed = 14.4kbaud
	}

	if err = session.RequestPty("xterm", 80, 40, modes); err != nil {
		ch <- Results{err: err, stderr: err.Error()}
		return
	}

	var bstderr bytes.Buffer
	var bstdout bytes.Buffer
	session.Stderr = &bstderr
	session.Stdout = &bstdout
	rc := 0

	if err := session.Run(cmd); err != nil {
		if ugh, ok := err.(*ssh.ExitError); ok {
			rc = ugh.Waitmsg.ExitStatus()
		}

		ch <- Results{err: err, rc: rc, stdout: bstdout.String(), stderr: bstderr.String()}
		return
	}

	ch <- Results{err: nil, rc: rc, stdout: bstdout.String(), stderr: bstderr.String()}
	return
}