Golang SSH client error "unable to authenticate, attempted methods [none publickey], no supported methods remain"

Issue

For some reason Golang SSH client can’t connect to my EC2 instance. It throws the following error:
ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

This is my code:

package main

import (
    "fmt"

    "github.com/helloyi/go-sshclient"
)

func main() {
    client, err := sshclient.DialWithKey("ip:port", "ubuntu", "my_key.pem")
    if err != nil {
        fmt.Println(err)
        return
    }

    out, err := client.Cmd("help").Output()
    if err != nil {
        fmt.Println(err)
        return
    }

    fmt.Println(string(out))
}

What’s interesting is that when I ran this code on my other computer the connection was made without any errors. So I think it must be a problem with the PC and not my code. I also tried connecting to the instance in Python using Paramiko client and it worked flawlessly. Of course I tried connecting using ssh command in CMD and MobaXTerm client – both worked. I tried using other Golang SSH client golang.org/x/crypto/ssh and it didn’t work (same error).

Thank you for your help.

Solution

Apparently, it was an issue with go.mod file. Both golang.org/x/crypto and golang.org/x/sys were outdated, once I updated them it started working. Thanks @kkleejoe for your help.

Answered By – Sharder Shard

Answer Checked By – Katrina (GoLangFix Volunteer)