Renci.SshNet.ClientAuthentication.Authenticate C# (CSharp) Method

        public void Authenticate(IConnectionInfoInternal connectionInfo, ISession session)
        {
            if (connectionInfo == null)
                throw new ArgumentNullException("connectionInfo");
            if (session == null)
                throw new ArgumentNullException("session");

            session.RegisterMessage("SSH_MSG_USERAUTH_FAILURE");
            session.RegisterMessage("SSH_MSG_USERAUTH_SUCCESS");
            session.RegisterMessage("SSH_MSG_USERAUTH_BANNER");
            session.UserAuthenticationBannerReceived += connectionInfo.UserAuthenticationBannerReceived;

            try
            {
                // the exception to report an authentication failure with
                SshAuthenticationException authenticationException = null;

                // try to authenticate against none
                var noneAuthenticationMethod = connectionInfo.CreateNoneAuthenticationMethod();

                var authenticated = noneAuthenticationMethod.Authenticate(session);
                if (authenticated != AuthenticationResult.Success)
                {
                    if (!TryAuthenticate(session, new AuthenticationState(connectionInfo.AuthenticationMethods), noneAuthenticationMethod.AllowedAuthentications.ToList(), ref authenticationException))
                    {
                        throw authenticationException;
                    }
                }
            }
            finally
            {
                session.UserAuthenticationBannerReceived -= connectionInfo.UserAuthenticationBannerReceived;
                session.UnRegisterMessage("SSH_MSG_USERAUTH_FAILURE");
                session.UnRegisterMessage("SSH_MSG_USERAUTH_SUCCESS");
                session.UnRegisterMessage("SSH_MSG_USERAUTH_BANNER");
            }

        }

        /// <summary>
        /// Authenticates the specified session.
        /// </summary>
        /// <param name="session">The session to be authenticated.</param>
        /// <exception cref="ArgumentNullException"><paramref name="session"/> is null.</exception>
        /// <exception cref="SshAuthenticationException">No suitable authentication method found to complete authentication, or permission denied.</exception>
        internal void Authenticate(ISession session)
        {
            IsAuthenticated = false;
            var clientAuthentication = new ClientAuthentication();

            clientAuthentication.Authenticate(this, session);
            IsAuthenticated = true;
        }