Zeep Mobile - Generating the authentication header - Java

gistfile1.java

// Created by Simon Wex (simon@zeepmobile.com) on 2008-07-12
// Copyright (c) 2008. All rights reserved.
// Released under MIT License

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;

public class HmacSha1 {
  public static final String API_KEY = "cef7a046258082993759bade995b3ae8";
  public static final String SECRET_ACCESS_KEY = "19c87eb3e3a28404e7ea8197d4401540";
  public static final String PATTERN_RFC1123 = "EEE, dd MMM yyyy HH:mm:ss zzz";

  /**
   * @param args
   */
  public static void main(String[] args) {
    try {

      SimpleDateFormat httpDateFormat = new SimpleDateFormat();
      httpDateFormat.applyPattern(PATTERN_RFC1123);
      httpDateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
      String httpDate = httpDateFormat.format(new Date());
      
      // (ex. Sat, 12 Jul 2008 09:04:28 GMT) http_date = Time.now.httpdate
      
      String body = URLEncoder.encode("Art thou not Romeo, and a Montague?", "UTF-8");
      
      //user_id=1234&body=Art+thou+not+Romeo%2C+and+a+Montague%3F
      String parameters = "user_id=1234&body=" + body;
      
      String canonicalString = API_KEY + httpDate + parameters;
      System.out.println(canonicalString);
      
      Mac mac = Mac.getInstance("HmacSHA1");
      byte[] keyBytes = SECRET_ACCESS_KEY.getBytes("UTF8");
      SecretKeySpec signingKey = new SecretKeySpec(keyBytes, "HmacSHA1");
      mac.init(signingKey);
      
      byte[] signBytes = mac.doFinal(canonicalString.getBytes("UTF8"));

      String b64Mac = Base64.encode(signBytes);
      String authentication = "Zeep " + API_KEY + ":" + b64Mac;

      System.out.println(authentication);
    }
    catch (NoSuchAlgorithmException e) {
      e.printStackTrace();
    }
    catch (UnsupportedEncodingException e) {
      e.printStackTrace();
    }
    catch (InvalidKeyException e) {
      e.printStackTrace();
    }
  }
}