keyboard-interactive used when ssh_bastion_host is true.

helper/communicator/config.go

@@ -132,6 +132,8 @@ type SSH struct {
 	SSHBastionUsername string `mapstructure:"ssh_bastion_username"`
 	// The password to use to authenticate with the bastion host.
 	SSHBastionPassword string `mapstructure:"ssh_bastion_password"`
+	// If `true`, the keyboard-interactive used to authenticate with bastion host.
+	SSHBastionInteractive bool `mapstructure:"ssh_bastion_interactive"`
 	// Path to a PEM encoded private key file to use to authenticate with the
 	// bastion host. The `~` can be used in path and will be expanded to the
 	// home directory of current user.

helper/communicator/step_connect_ssh.go

@@ -246,7 +246,9 @@ func (s *StepConnectSSH) waitForSSH(state multistep.StateBag, ctx context.Contex
 func sshBastionConfig(config *Config) (*gossh.ClientConfig, error) {
 	auth := make([]gossh.AuthMethod, 0, 2)
 
-	auth = append(auth, gossh.KeyboardInteractive(ssh.KeyboardInteractive()))
+	if config.SSHBastionInteractive {
+		auth = append(auth, gossh.KeyboardInteractive(ssh.KeyboardInteractive()))
+	}
 
 	if config.SSHBastionPassword != "" {
 		auth = append(auth,