[Golang]ssh登录及执行命令

November 4, 2019

5879 views

1867 words

```golang
package main

import (
	"fmt"
	"github.com/mitchellh/go-homedir"
	"golang.org/x/crypto/ssh"
	"io/ioutil"
	"log"
	"time"
)

func main() {
	re,err := sshL("192.168.199.1","root","rehttPassword","password","","uname -a",22)
	if err != nil{
	fmt.println(err)
	}
	fmt.println(string(re))
}

func sshL(sshHost,sshUser,sshPassword,sshType,sshKeyPath,command string,sshPort int) ([]byte,error) {

//创建sshp登陆配置
	config := &ssh.ClientConfig{
		Timeout:         time.Second,//ssh 连接time out 时间一秒钟, 如果ssh验证错误 会在一秒内返回
		User:            sshUser,
		HostKeyCallback: ssh.InsecureIgnoreHostKey(), //这个可以， 但是不够安全
		//HostKeyCallback: hostKeyCallBackFunc(h.Host),
	}
	if sshType == "password" {
		config.Auth = []ssh.AuthMethod{ssh.Password(sshPassword)}
	} else {
		config.Auth = []ssh.AuthMethod{publicKeyAuthFunc(sshKeyPath)}
	}

//dial 获取ssh client
	addr := fmt.Sprintf("%s:%d", sshHost, sshPort)
	sshClient, err := ssh.Dial("tcp", addr, config)
	if err != nil {
		log.Fatal("创建ssh client 失败",err)
		return nil,err
	}
	defer sshClient.Close()

//创建ssh-session
	session, err := sshClient.NewSession()
	if err != nil {
		log.Fatal("创建ssh session 失败",err)
		return nil,err
	}
	defer session.Close()
	//执行远程命令
	combo,err := session.CombinedOutput(command)
	if err != nil {
		log.Fatal("远程执行cmd 失败",err)
		return nil,err
	}
	return combo,nil
}

func publicKeyAuthFunc(kPath string) ssh.AuthMethod {
	keyPath, err := homedir.Expand(kPath)
	if err != nil {
		log.Fatal("find key's home dir failed", err)
	}
	key, err := ioutil.ReadFile(keyPath)
	if err != nil {
		log.Fatal("ssh key file read failed", err)
	}
	// Create the Signer for this private key.
	signer, err := ssh.ParsePrivateKey(key)
	if err != nil {
		log.Fatal("ssh key signer failed", err)
	}
	return ssh.PublicKeys(signer)
}
```

Last modification：November 4, 2019