Ruby

Get the SSH Server's Authentication Methods

Demonstrates the Chilkat Ssh.GetAuthMethods method, which queries a connected but unauthenticated SSH server for the authentication methods it advertises. It takes no arguments and returns a lowercase, comma-separated list such as publickey,password,keyboard-interactive. Call it after Connect and before authenticating.

Background: Knowing what the server accepts lets a client choose the right authentication path — for example, falling back to keyboard-interactive when password auth is not offered. Note the documented connection side effect: querying methods advances the SSH authentication state, so call it at the correct point in the sequence.

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Ruby

require 'chilkat'

success = false

#  Demonstrates the Ssh.GetAuthMethods method, which queries a connected but unauthenticated SSH
#  server for the authentication methods it advertises.  It takes no arguments and returns a
#  lowercase, comma-separated list such as "publickey,password,keyboard-interactive".

ssh = Chilkat::CkSsh.new()

#  Connect to the SSH server.  Port 22 is the usual SSH port.
sshPort = 22
success = ssh.Connect("ssh.example.com",sshPort)
if (success == false)
    print ssh.lastErrorText() + "\n";
    exit
end

#  Query the advertised authentication methods.  Call after Connect, before authenticating.
methods = ssh.getAuthMethods()
if (ssh.get_LastMethodSuccess() == false)
    print ssh.lastErrorText() + "\n";
    exit
end

print "Server auth methods: " + methods + "\n";

ssh.Disconnect()