[Live Now] Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Join for FREE! Join TestMu Conference

How to use connectToHost method of ssh Package

Best Venom code snippet using ssh.connectToHost

main.go

Source:main.go

...21func main() {22	if len(os.Args) < 3 {23		fmt.Println(version + " Usage: ssh-keyget <host:port> <type(dsa,rsa,ecdsa,ed25519)> <export(e)>")24	} else if len(os.Args) == 3 {25		connectToHost(os.Args[1], os.Args[2], "")26	} else if len(os.Args) == 4 {27		connectToHost(os.Args[1], os.Args[2], os.Args[3])28	} else {29		fmt.Println("Too many arguments")30	}31}32// truncateString truncate string to given size33func truncateString(s string, size int) string {34	ts := s35	if len(s) > size {36		ts = s[0:size]37	}38	return ts39}40// chunkString convert string to chunks of given size41func chunkString(s string, chunkSize int) []string {42	var chunks []string43	runes := []rune(s)44	if len(runes) == 0 {45		return []string{s}46	}47	for i := 0; i < len(runes); i += chunkSize {48		nn := i + chunkSize49		if nn > len(runes) {50			nn = len(runes)51		}52		chunks = append(chunks, string(runes[i:nn]))53	}54	return chunks55}56// getPublicKeyInfo gets the public key type and length57func getPublicKeyInfo(in []byte) (string, int, error) {58	pk, err := ssh.ParsePublicKey(in)59	if err != nil {60		if strings.Contains(err.Error(), "ssh: unknown key algorithm") {61			return "", 0, err62		}63		return "", 0, fmt.Errorf("ssh.ParsePublicKey: %v", err)64	}65	switch pk.Type() {66	case ssh.KeyAlgoDSA:67		w := struct {68			Name string69			P, Q, G, Y *big.Int70		}{}71		if err := ssh.Unmarshal(pk.Marshal(), &w); err != nil {72			return "", 0, err73		}74		return "dsa", w.P.BitLen(), nil75	case ssh.KeyAlgoRSA:76		w := struct {77			Name string78			E, N *big.Int79		}{}80		if err := ssh.Unmarshal(pk.Marshal(), &w); err != nil {81			return "", 0, err82		}83		return "RSA", w.N.BitLen(), nil84	case ssh.KeyAlgoECDSA256:85		return "ECDSA", 256, nil86	case ssh.KeyAlgoECDSA384:87		return "ECDSA", 384, nil88	case ssh.KeyAlgoECDSA521:89		return "ECDSA", 521, nil90	case ssh.KeyAlgoED25519:91		return "ED25519", 256, nil92	}93	return "", 0, fmt.Errorf("unsupported key type: %s", pk.Type())94}95// trustedHostKeyCallback host key callback from connect96func trustedHostKeyCallback(host string, export string) ssh.HostKeyCallback {97	return func(_ string, _ net.Addr, k ssh.PublicKey) error {98		ks := base64.StdEncoding.EncodeToString(k.Marshal())99		keytype, length, _ := getPublicKeyInfo(k.Marshal())100		fpmd5 := ssh.FingerprintLegacyMD5(k)101		fpsha256 := ssh.FingerprintSHA256(k)102		comment := keytype + " " + strconv.Itoa(length) + ", " + host103		if export == "e" {104			fmt.Println(ssh2Header)105			ssh2Comment := "Comment: " + comment106			fmt.Println(truncateString(ssh2Comment, ssh2Width - 1) + "\\")107			fmt.Println("MD5:" + fpmd5 + "\\")108			fmt.Println(fpsha256)109			fmt.Println(strings.Join(chunkString(ks, ssh2Width), "\n"))110			fmt.Println(ssh2Footer)111		} else {112			fmt.Println(k.Type() + " " + ks + " " + comment + ", MD5:" + fpmd5 + ", " + fpsha256)113		}114		return nil115	}116}117// connectToHost connect to host to get public key118func connectToHost(host string, keytype string, export string){119	if !strings.Contains(host, ":")	{120		host = host + ":" + strconv.Itoa(sshDefaultPort)121	}122	sshConfig := &ssh.ClientConfig{123		User:              "",124		Auth:              []ssh.AuthMethod{ssh.Password("")},125		HostKeyCallback:   trustedHostKeyCallback(host, export),126	}127	switch keytype {128	case "dsa":129		sshConfig.HostKeyAlgorithms = []string{ssh.KeyAlgoDSA}130	case "rsa":131		sshConfig.HostKeyAlgorithms = []string{ssh.KeyAlgoRSA}132	case "ecdsa":...

esxi_remote_cmds.go

Source:esxi_remote_cmds.go

...9	"github.com/tmc/scp"10	"golang.org/x/crypto/ssh"11)12// Connect to esxi host using ssh13func connectToHost(esxiConnInfo ConnectionStruct, attempt int) (*ssh.Client, *ssh.Session, error) {14	sshConfig := &ssh.ClientConfig{15		User: esxiConnInfo.user,16		Auth: []ssh.AuthMethod{17			ssh.KeyboardInteractive(func(user, instruction string, questions []string, echos []bool) ([]string, error) {18				// Reply password to all questions19				answers := make([]string, len(questions))20				for i, _ := range answers {21					answers[i] = esxiConnInfo.pass22				}23				return answers, nil24			}),25		},26	}27	sshConfig.HostKeyCallback = ssh.InsecureIgnoreHostKey()28	esxi_hostandport := fmt.Sprintf("%s:%s", esxiConnInfo.host, esxiConnInfo.port)29	//attempt := 1030	for attempt > 0 {31		client, err := ssh.Dial("tcp", esxi_hostandport, sshConfig)32		if err != nil {33			log.Printf("[runRemoteSshCommand] Retry connection: %d\n", attempt)34			attempt -= 135			time.Sleep(1 * time.Second)36		} else {37			session, err := client.NewSession()38			if err != nil {39				client.Close()40				return nil, nil, fmt.Errorf("Session Connection Error")41			}42			return client, session, nil43		}44	}45	return nil, nil, fmt.Errorf("Client Connection Error")46}47//  Run any remote ssh command on esxi server and return results.48func runRemoteSshCommand(esxiConnInfo ConnectionStruct, remoteSshCommand string, shortCmdDesc string) (string, error) {49	log.Println("[runRemoteSshCommand] :" + shortCmdDesc)50	var attempt int51	if remoteSshCommand == "vmware --version" {52		attempt = 353	} else {54		attempt = 1055	}56	client, session, err := connectToHost(esxiConnInfo, attempt)57	if err != nil {58		log.Println("[runRemoteSshCommand] Failed err: " + err.Error())59		return "Failed to ssh to esxi host", err60	}61	stdout_raw, err := session.CombinedOutput(remoteSshCommand)62	stdout := strings.TrimSpace(string(stdout_raw))63	if stdout == "<unset>" {64		return "Failed to ssh to esxi host or Management Agent has been restarted", err65	}66	log.Printf("[runRemoteSshCommand] cmd:/%s/\n stdout:/%s/\nstderr:/%s/\n", remoteSshCommand, stdout, err)67	client.Close()68	return stdout, err69}70//  Function to scp file to esxi host.71func writeContentToRemoteFile(esxiConnInfo ConnectionStruct, content string, path string, shortCmdDesc string) (string, error) {72	log.Println("[writeContentToRemoteFile] :" + shortCmdDesc)73	f, _ := ioutil.TempFile("", "")74	fmt.Fprintln(f, content)75	f.Close()76	defer os.Remove(f.Name())77	client, session, err := connectToHost(esxiConnInfo, 10)78	if err != nil {79		log.Println("[writeContentToRemoteFile] Failed err: " + err.Error())80		return "Failed to ssh to esxi host", err81	}82	err = scp.CopyPath(f.Name(), path, session)83	if err != nil {84		log.Println("[writeContentToRemoteFile] Failed err: " + err.Error())85		return "Failed to scp file to esxi host", err86	}87	client.Close()88	return content, err89}...

myssh.go

Source:myssh.go

...11	Port     string12	Password string13}14func (ssh_conf *MakeConfig) Run(command string) (string, error) {15	client, session, err := connectToHost(ssh_conf.User, ssh_conf.Password, ssh_conf.Server+":"+ssh_conf.Port)16	if err != nil {17		panic(err)18	}19	out, err := session.CombinedOutput(command)20	if err != nil {21		panic(err)22	}23	fmt.Println(string(out))24	client.Close()25	return string(out), err26}27func connectToHost(user, pass, host string) (*ssh.Client, *ssh.Session, error) {28	sshConfig := &ssh.ClientConfig{29		User: user,30		Auth: []ssh.AuthMethod{ssh.Password(pass)},31	}32	client, err := ssh.Dial("tcp", host, sshConfig)33	if err != nil {34		return nil, nil, err35	}36	session, err := client.NewSession()37	if err != nil {38		client.Close()39		return nil, nil, err40	}41	return client, session, nil...

connectToHost

Using AI Code Generation

1import (2func main() {3    privateKey, err := ioutil.ReadFile("id_rsa")4    if err != nil {5        panic("Failed to read private key")6    }7    signer, err := ssh.ParsePrivateKey(privateKey)8    if err != nil {9        panic("Failed to parse private key")10    }11    client, err := ssh.Dial("tcp", "

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.