建立安全的AXIS服务(下) -

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建立安全的AXIS服务(下)

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AXIS

AXIS

四、使用WS-Security规范对信息进行加密与身份认证
    我们打算用Handler结合WSSecurity实现Web服务安全
    设想流程：用WSClientRequestHandler.java位于客户端对客户端发出的XML文档进行加密 WSServerRequestHandler.java位于服务器端对客户端发出的加密后的XML文档进行解密
WSServerResponseHandler.java位于服务器端对服务器端返回的XML文档进行加密
WSClientResponseHandler.java位于客户端对服务器端返回的XML文档进行解密

1、使用ISNetworks安全提供者，ISNetworks实现了RSA加密、解密算法。
    当然，你也可以使用其它的安全提供者，并且可以使用不同的加密算法。
    ISNetworks相关包ISNetworksProvider.jar。拷贝到%TOMCAT_HOME%     \webapps\axis\WEB-INF\lib

2、Trust Services Integration Kit提供了一个WS-Security实现。你可以从http://www.xmltrustcenter.org获得相关库文件，分别是ws-security.jar和tsik.jar。ws-security.jar中包含一个WSSecurity类，我们使用它来对XML进行数字签名和验证，加密与解密。同样拷贝到%TOMCAT_HOME%\webapps\axis\WEB-INF\lib

3、创建密匙库和信任库。（见上文，一模一样！）

4、框架结构
    WSClientHandler.java  //基类，包含了一些公用方法
    WSClientRequestHandler.java //继承于WSClientHandler.java，调用WSHelper.java对客户端发出的XML文档进行加密
    WSClientResponseHandler.java //继承于WSClientHandler.java，调用WSHelper.java对服务器端返回的XML文档进行解密
    WSServerHandler.java //基类，包含了一些公用方法
    WSServerRequestHandler.java //继承于WSServerHandler.java，调用WSHelper.java对客户端发出的加密后的XML文档进行解密
    WSServerResponseHandler.java//继承于WSServerHandler.java，调用WSHelper.java对服务器端返回的XML文档进行加密
    WSHelper.java //核心类，对SOAP消息签名、加密、解密、身份验证
    MessageConverter.java  //帮助类，Document、SOAP消息互相转换

5、具体分析（在此强烈建议看一下tsik.jar的API）
    WSHelper.java

    public class WSHelper {
        static String PROVIDER="ISNetworks";//JSSE安全提供者。
  //添加JSSE安全提供者，你也可以使用其它安全提供者。只要支持DESede算法。这是程序里动态加载还可以在JDK中静态加载
        static
        {
         java.security.Security.addProvider(new com.isnetworks.provider.jce.ISNetworksProvider());
    }
    /**
     *对XML文档进行数字签名。
     */
        public static void sign(Document doc, String keystore, String storetype,
                                                String storepass, String alias, String keypass) throws Exception {
                FileInputStream fileInputStream = new FileInputStream(keystore);
                java.security.KeyStore keyStore = java.security.KeyStore.getInstance(storetype);
                keyStore.load(fileInputStream, storepass.toCharArray());
                PrivateKey key = (PrivateKey)keyStore.getKey(alias, keypass.toCharArray());
                X509Certificate cert = (X509Certificate)keyStore.getCertificate(alias);
                SigningKey sk = SigningKeyFactory.makeSigningKey(key);
                KeyInfo ki = new KeyInfo();
                ki.setCertificate(cert);
                WSSecurity wSSecurity = new WSSecurity();//ws-security.jar中包含的WSSecurity类
                wSSecurity.sign(doc, sk, ki);//签名。

        }
    /**
     *对XML文档进行身份验证。
     */
        public static boolean verify(Document doc, String keystore, String storetype,
                                                String storepass) throws Exception {
                FileInputStream fileInputStream = new FileInputStream(keystore);
                java.security.KeyStore keyStore = java.security.KeyStore.getInstance(storetype);
                keyStore.load(fileInputStream, storepass.toCharArray());
                TrustVerifier verifier = new X509TrustVerifier(keyStore);
                WSSecurity wSSecurity = new WSSecurity();
                MessageValidity[] resa = wSSecurity.verify(doc, verifier, null,null);
                if (resa.length > 0)
                        return resa[0].isValid();
                return false;
        }
   /**
    *对XML文档进行加密。必须有JSSE提供者才能加密。
    */
        public static void encrypt(Document doc, String keystore, String storetype,
                                                String storepass, String alias) throws Exception {
                try
                {
                FileInputStream fileInputStream = new FileInputStream(keystore);
                java.security.KeyStore keyStore = java.security.KeyStore.getInstance(storetype);
                keyStore.load(fileInputStream, storepass.toCharArray());
                X509Certificate cert = (X509Certificate)keyStore.getCertificate(alias);
                PublicKey pubk = cert.getPublicKey();
                KeyGenerator keyGenerator = KeyGenerator.getInstance("DESede",PROVIDER);
                keyGenerator.init(168, new SecureRandom());
                SecretKey key = keyGenerator.generateKey();
                KeyInfo ki = new KeyInfo();
                ki.setCertificate(cert);
                WSSecurity wSSecurity = new WSSecurity();
                //加密。
                wSSecurity.encrypt(doc, key, AlgorithmType.TRIPLEDES, pubk, AlgorithmType.RSA1_5, ki);
        }
        catch(Exception e)
        {
                e.printStackTrace();
        }
        }
    /**
     *对文档进行解密。
     */
        public static void decrypt(Document doc, String keystore, String storetype,
                                                String storepass, String alias, String keypass) throws Exception {
                FileInputStream fileInputStream = new FileInputStream(keystore);
                java.security.KeyStore keyStore = java.security.KeyStore.getInstance(storetype);
                keyStore.load(fileInputStream, storepass.toCharArray());
                PrivateKey prvk2 = (PrivateKey)keyStore.getKey(alias, keypass.toCharArray());

                WSSecurity wSSecurity = new WSSecurity();
                //解密。

                wSSecurity.decrypt(doc, prvk2, null);
                WsUtils.removeEncryptedKey(doc);//从 WS-Security Header中删除 EncryptedKey 元素
        }

        public static void removeWSSElements(Document doc) throws Exception {
                WsUtils.removeWSSElements(doc);// 删除WSS相关的元素。
        }

}

WSClientHandler.java

   //继承自org.apache.axis.handlers.BasicHandler即AXIS内在的
   public class WSClientHandler extends BasicHandler{
  protected String keyStoreFile ;
  protected  String keyStoreType ="JKS";//默认
  protected String keyStorePassword ;
  protected String keyAlias ;
  protected String keyEntryPassword ;
  protected String trustStoreFile ;
  protected String trustStoreType = "JKS";//默认
  protected String trustStorePassword ;
  protected String certAlias ;

  public void setInitialization(String keyStoreFile,String keyStoreType,String keyStorePassword,
                 String keyAlias,String keyEntryPassword,String trustStoreFile,
                 String trustStoreType,String trustStorePassword,String certAlias){
  this.keyStoreFile=keyStoreFile;
  this.keyStoreType=keyStoreType;
  this.keyStorePassword=keyStorePassword;
  this.keyAlias=keyAlias;
  this.keyEntryPassword=keyEntryPassword;
  this.trustStoreFile=trustStoreFile;
  this.trustStoreType=trustStoreType;
  this.trustStorePassword=trustStorePassword;
  this.certAlias=certAlias;
}
  public void setInitialization(String keyStoreFile,String keyStorePassword,
                String keyAlias,String keyEntryPassword,String trustStoreFile,
                String trustStorePassword,String certAlias){
  this.keyStoreFile=keyStoreFile;
  this.keyStorePassword=keyStorePassword;
  this.keyAlias=keyAlias;
  this.keyEntryPassword=keyEntryPassword;
  this.trustStoreFile=trustStoreFile;
  this.trustStorePassword=trustStorePassword;
  this.certAlias=certAlias;
}
  public void invoke(MessageContext messageContext) throws AxisFault {//在这个方法里对XML文档进行处理
    //do nothing now!
  }
  public void onFault(MessageContext msgContext) {
    System.out.println("处理错误，这里忽略！");
        }
}

WSClientRequestHandler.java

  public class WSClientRequestHandler extends WSClientHandler{
  public void invoke(MessageContext messageContext) throws AxisFault {
    try {

     SOAPMessage soapMessage = messageContext.getMessage();
     Document doc = MessageConverter.convertSoapMessageToDocument(soapMessage); //soapMessage转换为Document
     WSHelper.sign(doc, keyStoreFile, keyStoreType,keyStorePassword, keyAlias, keyEntryPassword); //数字签名
     WSHelper.encrypt(doc, trustStoreFile, trustStoreType, trustStorePassword, certAlias); //加密
     soapMessage = MessageConverter.convertDocumentToSOAPMessage(doc);
//处理后的Document再转换回soapMessage
     messageContext.setMessage(soapMessage);
     } catch (Exception e){
     System.err.println("在处理响应时发生以下错误： " + e);
      e.printStackTrace();  }
        }
}

WSClientResponseHandler.java

  public class WSClientResponseHandler extends WSClientHandler{
  public void invoke(MessageContext messageContext) throws AxisFault {
    try {

            SOAPMessage soapMessage =  messageContext.getCurrentMessage();
            Document doc = MessageConverter.convertSoapMessageToDocument(soapMessage);

        WSHelper.decrypt(doc, keyStoreFile, keyStoreType,
                            keyStorePassword, keyAlias, keyEntryPassword);//解密

            WSHelper.verify(doc, trustStoreFile, trustStoreType, trustStorePassword);//验证
            WSHelper.removeWSSElements(doc);
            soapMessage = MessageConverter.convertDocumentToSOAPMessage(doc);
            messageContext.setMessage(soapMessage);
    } catch (Exception e){
            e.printStackTrace();
            System.err.println("在处理响应时发生以下错误： " + e);
                         }

        }
}

   WSServerHandler.java

   public class WSServerHandler extends BasicHandler{
  protected String keyStoreFile ;
  protected  String keyStoreType ="JKS";//默认
  protected String keyStorePassword ;
  protected String keyAlias ;
  protected String keyEntryPassword ;
  protected String trustStoreFile ;
  protected String trustStoreType = "JKS";//默认
  protected String trustStorePassword ;
  protected String certAlias ;

  public void invoke(MessageContext messageContext) throws AxisFault {
    //do nothing now!
  }
  public void onFault(MessageContext msgContext) {
    System.out.println("处理错误，这里忽略！");
        }
  public void init() { //初始化，从配置文件server-config.wsdd中读取属性
    keyStoreFile = (String)getOption("keyStoreFile");
    if(( keyStoreFile== null) )
      System.err.println("Please keyStoreFile configured for the Handler!");
    trustStoreFile = (String)getOption("trustStoreFile");
     if((  trustStoreFile== null) )
    System.err.println("Please trustStoreFile configured for the Handler!");
    keyStorePassword = (String)getOption("keyStorePassword");
     if(( keyStorePassword== null) )
    System.err.println("Please keyStorePassword configured for the Handler!");
    keyAlias = (String)getOption("keyAlias");
     if(( keyAlias== null) )
    System.err.println("Please keyAlias configured for the Handler!");
    keyEntryPassword = (String)getOption("keyEntryPassword");
     if(( keyEntryPassword== null) )
    System.err.println("Please keyEntryPassword configured for the Handler!");
    trustStorePassword = (String)getOption("trustStorePassword");
     if(( trustStorePassword== null) )
    System.err.println("Please trustStorePassword configured for the Handler!");
    certAlias = (String)getOption("certAlias");
    if ((certAlias==null))
        System.err.println("Please certAlias configured for the Handler!");
    if ((getOption("keyStoreType")) != null)
       keyStoreType = (String)getOption("keyStoreType");
    if ((getOption("trustStoreType")) != null)
       trustStoreType = (String)getOption("trustStoreType");
    }
}

    WSServerRequestHandler.java

    public class WSServerRequestHandler extends WSServerHandler{
  public void invoke(MessageContext messageContext) throws AxisFault {
    try {
      SOAPMessage msg = messageContext.getCurrentMessage();
            Document doc = MessageConverter.convertSoapMessageToDocument(msg);
            System.out.println("接收的原始消息:");
           msg.writeTo(System.out);
        WSHelper.decrypt(doc, keyStoreFile, keyStoreType,
                            keyStorePassword, keyAlias, keyEntryPassword);//解密

            WSHelper.verify(doc, trustStoreFile, trustStoreType, trustStorePassword);//验证
            WSHelper.removeWSSElements(doc);
            msg = MessageConverter.convertDocumentToSOAPMessage(doc);
            System.out.println("怀原后的原始消息:");
            msg.writeTo(System.out);
            messageContext.setMessage(msg);
    } catch (Exception e){
            e.printStackTrace();
            System.err.println("在处理响应时发生以下错误： " + e);
                         }

        }
}

WSServerResponseHandler.java

     public class WSServerResponseHandler extends WSServerHandler{
  public void invoke(MessageContext messageContext) throws AxisFault {
    try {

     SOAPMessage soapMessage = messageContext.getMessage();
       System.out.println("返回的原始消息:");
         soapMessage.writeTo(System.out);
      Document doc = MessageConverter.convertSoapMessageToDocument(soapMessage);

        WSHelper.sign(doc, keyStoreFile, keyStoreType,
          keyStorePassword, keyAlias, keyEntryPassword);//数字签名
       WSHelper.encrypt(doc, trustStoreFile, trustStoreType,//加密
        trustStorePassword, certAlias);

       soapMessage = MessageConverter.convertDocumentToSOAPMessage(doc);
       System.out.println("返回的加密后的消息:");
       soapMessage.writeTo(System.out);
       messageContext.setMessage(soapMessage);
        } catch (Exception e){
        System.err.println("在处理响应时发生以下错误： " + e);
         e.printStackTrace();
         }

        }
}

6、应用
   为方便使用，把上述文件打包为ws-axis.jar,放入%TOMCAT_HOME%\webapps\axis\WEB-INF\lib

   1）把HelloWorld重新部署一次，在server-config.wsdd中修改如下部署代码。

2)修改客户端程序 TestClient.java（修改的部分已标出，记着导入ws-axis.jar）

    import javax.xml.namespace.QName;
    import org.apache.axis.client.Call;
    import org.apache.axis.client.Service;
    import com.ronghao.WSAxis.*;

    public class WSSClient1
{
    public static void main(String [] args)
    {
        try {
                //服务端的url，需要根据情况更改。
            String endpointURL = "http://localhost:8080/axis/services/HelloWorld";
            Service svc = new Service();

            WSClientHandler handler=new WSClientRequestHandler();
//注意新加的HANDLER
            handler.setInitialization("f:/client.keystore","changeit","Client","changeit",
                "f:/client.truststore","changeit","serverkey");//初始化
            WSClientHandler handlee=new WSClientResponseHandler();
//注意新加的HANDLER
            handlee.setInitialization("f:/client.keystore","changeit","Client","changeit",
                "f:/client.truststore","changeit","serverkey");//初始化
                     Call call =(Call)svc.createCall();
                     call.setClientHandlers(handler,handlee);//添加Handler
                     call.setTargetEndpointAddress(new java.net.URL(endpointURL));
                     call.setOperationName(new QName("sayHello"));

                     String result = (String) call.invoke( new Object [] {});
                     System.out.println("the result"+result);

        } catch (Exception e) {
                e.printStackTrace();
        }
    }

}

   运行的时候http://localhost:8080/axis/SOAPMonitor中看到的请求的XML就已加密！

总结
   这里对代码的解释是不够的，很多概念没有提到。建议你最好看tsik.jar和AXIS的API深入了解。另外对ws-axis.jar的加解密实现打算运用apache的wss4j,相关网址http://ws.apache.org/ws-fx/wss4j/。不过这个东西也应该够用了暂时。