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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", "

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