byte[] signingKey = npa.getSigningKey(getContext(), negoResp.getServerData().encryptionKey);
                        if ( signingKey == null ) {
                            throw new SmbException("Need a signature key but the server did not provide one");
                        }
                        request.setDigest(new SMB1SigningDigest(signingKey, false));
                    }
                }