ssh handshake failed

[blia....@gmail.com]

Hi all, I'm trying to write a simple ssh script and I'm seeing constant failure with: Failed to dial: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none], no supported methods remain.

I'm using the given example from the docs (code.google.com/p/go.crypto/ssh) and adding in a username and password that I know works. I'm using go1.3.3 on Mac OSX 10.8. 

I've tried running this against Mac and Linux and seeing the same failure. On Linux, I have OpenSSH installed.

I know that there are some issues with the supporting ciphers but I just don't know what's causing it. This is my config, I've added the ciphers. I don't know if thats helping or making it worst.

config := &ssh.ClientConfig{

User: "admin",

Auth: []ssh.AuthMethod{

ssh.Password("password"),

},

Config: ssh.Config{

Ciphers: []string{"aes128-ctr", "aes192-ctr", "aes256-ctr", "arcfour256", "arcfour128", "aes128-cbc", "3des-cbc", "blowfish-cbc", "cast128-cbc", "aes192-cbc", "aes256-cbc", "arcfour"},

},

}

Any help, suggestions is appreciative. Thanks in advance!

[Shawn Milochik]

I just did this and it works:

     http://play.golang.org/p/dW9cB73Fcy

So does this:

    http://play.golang.org/p/q0Tk17a6yT

I don't see what you're doing wrong, I'm not populating ClientConfig.Config and it works without it (both with private key auth and password authentication). So maybe try just dropping that.

[Lars Seipel]

On Wed, Nov 05, 2014 at 09:16:36AM -0800, blia....@gmail.com wrote:
> Hi all, I'm trying to write a simple ssh script and I'm seeing constant

> failure with: *Failed to dial: ssh: handshake failed: ssh: unable to
> authenticate, attempted methods [none], no supported methods remain.*

My guess would be that your sshd does not enable password authentication
but only keyboard-interactive. Take a look at ssh.KeyboardInteractive.
It should return an appropriate ssh.AuthMethod. Or, better yet, use
public-key-based auth.

You could also change your sshd's configuration to allow
PasswordAuthentication.

Lars

[Lars Seipel]

On Thu, Nov 06, 2014 at 12:30:00AM +0100, Lars Seipel wrote:
> My guess would be that your sshd does not enable password authentication
> but only keyboard-interactive.

Addendum: to verify this, you might try to restrict OpenSSH's client to
using password auth only.

% ssh -oPreferredAuthentications=password user@host

If that works, my guess would be false. If it doesn't and prints
something like "Permission denied (publickey,keyboard-interactive)"
instead, see my last mail on what you can do.

Lars

[Blia Xiong]

I did manage to get Public Key to work. I'll have to go and play with the configurations some more and see. For the moment, it looks like a bug but very unlikely.

Thanks for the input.

--

Thanks!

Blia Xiong

bliax...@gmail.com

[Blia Xiong]

So I did some more testing and configured SSHd and set PasswordAuthentication yes. On one of the machines, running % ssh -oPreferredAuthentications=password user@host resulted in Permission denied (publickey,keyboard-interactive). The other one worked with password authentication. 

It now works. Appreciate the help!