Rain City Consulting

import org.apache.xmlrpc.client.*;
 
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.codec.binary.Hex;
 
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
 
import java.net.URL;
import java.security.SignatureException;
import java.util.HashMap;
import java.util.Map;
 
public class T {
    public static final String domain = "example.com"; // As set in Drupal
    public static final String apiKey = "0c77a3db905bc70f7cdfec049601c0bf"; // As found in drupal
 
    public static void main(String[] args) throws Exception {
 
        XmlRpcClientConfigImpl config = new XmlRpcClientConfigImpl();
        config.setServerURL(new URL("http://example.com/services/xmlrpc"));
        XmlRpcClient client = new XmlRpcClient();
        client.setConfig(config);
 
        Object[] params = null;
        Object result = null;
        long timestamp = 0;
 
        params = new Object[] {};
        result = client.execute("system.listMethods", params);
        printResult(result);
 
        params = new Object[] {};
        result = client.execute("system.connect", params);
        printResult(result);
        String sessid = (String) ((Map) result).get("sessid");
 
        timestamp = System.currentTimeMillis() / 1000;
        String randomString = randomString();
        String data = timestamp + ";" + domain + ";" + randomString + ";" + "user.login";
        String hash = calcHMACSHA256(data, apiKey);
        params = new Object[] {hash, domain, String.valueOf(timestamp), randomString, sessid, "scott", "tiger"};
        result = client.execute("user.login", params);
        printResult(result);
        sessid = (String) ((Map) result).get("sessid");
 
        timestamp = System.currentTimeMillis() / 1000;
        randomString = randomString();
        data = timestamp + ";" + domain + ";" + randomString + ";" + "user.save";
        hash = calcHMACSHA256(data, apiKey);
        Map user = new HashMap();
        user.put("uid", 76196);
        user.put("mail", "ian@1321.org3");
        params = new Object[] {hash, domain, String.valueOf(timestamp), randomString, sessid, user};
        result = client.execute("user.save", params);
        printResult(result);
    }
 
    public static void printResult(Object result) {
        System.out.println(result.getClass());
        if (result.getClass().isArray()) {
            for (Object o : (Object[]) result) {
                System.out.println(o);
            }
        } else {
            System.out.println(result);
        }
    }
 
    private static String randomString() {
        return DigestUtils.md5Hex(String.valueOf(System.currentTimeMillis()));
    }
 
    private static String calcHMACSHA256(String data, String key) throws Exception {
        SecretKeySpec signingKey = new SecretKeySpec(key.getBytes(), "HmacSHA256");
        Mac mac = Mac.getInstance("HmacSHA256");
        mac.init(signingKey);
        byte[] rawHmac = mac.doFinal(data.getBytes());
 
        return Hex.encodeHexString(rawHmac);
    }
}