SSH Private key with Passphrase Example

main.go

package main

import (
	"crypto/x509"
	"encoding/pem"
	"fmt"
	"io/ioutil"
	"log"

	"github.com/howeyc/gopass"
	"golang.org/x/crypto/ssh"
)

func main() {
	fmt.Println("test")

	b, err := ioutil.ReadFile("test")

	if err != nil {
		log.Fatalln("could not load file")
	}

	pemBlock, _ := pem.Decode(b)
	pass, err := gopass.GetPasswd()
	fmt.Println(string(pass))
	DecryptedPEMBlock, err := x509.DecryptPEMBlock(pemBlock, pass)
	r, err := x509.ParsePKCS1PrivateKey(DecryptedPEMBlock)
	if err != nil {
		log.Fatalln(err)
	}

	signer, err := ssh.NewSignerFromKey(r)
	if err != nil {
		log.Fatal(err)
	}

	auths := []ssh.AuthMethod{ssh.PublicKeys(signer)}

	cfg := &ssh.ClientConfig{
		User: "app-admin",
		Auth: auths,
	}

	client, err := ssh.Dial("tcp", "localhost:2020", cfg)
	if err != nil {
		fmt.Println("yo")
		log.Fatal(err)
	}

	session, err := client.NewSession()
	if err != nil {
		fmt.Println("bo")
		log.Fatal(err)
	}

	session.Run("touch test")
	log.Println("we have a session!")

}