validateStringEmpty(problems, serverField + ".privateKey", server.getPrivateKey(), msgS);
                validateStringEmpty(problems, serverField + ".passphrase", server.getPassphrase(), msgS);
                validateStringEmpty(problems, serverField + ".filePermissions", server.getFilePermissions(), msgS);
                validateStringEmpty(

            AuthenticationBuilder authBuilder = new AuthenticationBuilder();
            authBuilder.addUsername(auth.getUsername()).addPassword(auth.getPassword());
            authBuilder.addPrivateKey(auth.getPrivateKey(), auth.getPassphrase());
            result = authBuilder.build();
        }
        return result;
    }

    private static Proxy toProxy(org.apache.maven.repository.Proxy proxy) {
        Proxy result = null;

            authBuilder.addUsername(server.getUsername()).addPassword(server.getPassword());
            authBuilder.addPrivateKey(server.getPrivateKey(), server.getPassphrase());
            authSelector.add(server.getId(), authBuilder.build());

            if (server.getConfiguration() != null) {
                XmlNode dom = server.getDelegate().getConfiguration();