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WebService CXF学习（高级篇3）：WS-Security

这一节我们来探讨一下WebService安全问题，如果所有系统都运行在一个封闭的局域网内，那么可以不考虑网络攻击，拒绝服务，消息篡改，窃取等问题。但通常情况都接入互联网，那么我就得考虑信息安全问题，像前面那样直接将消息裸传，肯定不行。那么，我们就得给消息加密。CXF可以结合WSS4J来对消息安全进行管理，可以使用令牌，X.509认证对消息头或内容进行加密。这节我只对令牌加密做一个简单的描述，我们还以Demo的形式来讲解一下。这个Demo是在CXF+Spring+Hibernate的基础修改而成。在这里我只针对修改的东西进行讲解。

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jaxws="http://cxf.apache.org/jaxws" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd"> <import resource="classpath:META-INF/cxf/cxf.xml" /> <import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" /> <import resource="classpath:META-INF/cxf/cxf-servlet.xml" /> <jaxws:endpoint id="service" implementor="com.itdcl.service.ServiceImpl" address="/Service"> <jaxws:inInterceptors> <bean class="org.apache.cxf.interceptor.LoggingInInterceptor" /> <bean class="org.apache.cxf.binding.soap.saaj.SAAJInInterceptor" /> <bean class="org.apache.cxf.ws.security.wss4j.WSS4JInInterceptor"> <constructor-arg> <map> <entry key="action" value="UsernameToken" /> <entry key="passwordType" value="PasswordText" /> <entry key="user" value="cxfServer" /> <entry key="passwordCallbackRef"> <ref bean="serverPasswordCallback" /> </entry> </map> </constructor-arg> </bean> </jaxws:inInterceptors> </jaxws:endpoint> <bean id="serverPasswordCallback" class="com.itdcl.ws.ServerPasswordCallback" /> </beans>

action:UsernameToken指使用用户令牌 passwordType:PasswordText指密码加密策略，这里直接文本 user:cxfServer指别名 passwordCallBackRef:serverPasswordCallback指消息验证消息验证类：

package com.itdcl.ws; import java.io.IOException; import javax.security.auth.callback.Callback; import javax.security.auth.callback.CallbackHandler; import javax.security.auth.callback.UnsupportedCallbackException; import org.apache.ws.security.WSPasswordCallback; public class ServerPasswordCallback implements CallbackHandler { public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException { WSPasswordCallback pc = (WSPasswordCallback) callbacks[0]; String pw = pc.getPassword(); String idf = pc.getIdentifier(); System.out.println("password:"+pw); System.out.println("identifier:"+idf); if (pw.equals("josen") && idf.equals("admin")) { // 验证通过 } else { throw new SecurityException("验证失败"); } } }

消息验证类通过实现CallbackHandler接口，实现handle方法来进行用户认证。那么，客户端又怎样来验证消息是否确呢。

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jaxws="http://cxf.apache.org/jaxws" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd"> <jaxws:client id="service" address="http://localhost:9999/cxf/Service" serviceClass="com.itdcl.service.IService"> <jaxws:outInterceptors> <bean class="org.apache.cxf.interceptor.LoggingOutInterceptor" /> <bean class="org.apache.cxf.binding.soap.saaj.SAAJOutInterceptor" /> <bean class="org.apache.cxf.ws.security.wss4j.WSS4JOutInterceptor"> <constructor-arg> <map> <entry key="action" value="UsernameToken" /> <entry key="passwordType" value="PasswordText" /> <entry key="user" value="cxfClient" /> <entry key="passwordCallbackRef"> <ref bean="clientPasswordCallback" /> </entry> </map> </constructor-arg> </bean> </jaxws:outInterceptors> </jaxws:client> <bean id="clientPasswordCallback" class="com.itdcl.ws.ClientPasswordCallback" /> </beans>

客户端在发送SOAP时对消息对认证，策略跟服务端一样。但是认证类有所区别：

package com.itdcl.ws;

import java.io.IOException; import javax.security.auth.callback.Callback; import javax.security.auth.callback.CallbackHandler; import javax.security.auth.callback.UnsupportedCallbackException; import org.apache.ws.security.WSPasswordCallback; public class ClientPasswordCallback implements CallbackHandler { public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException { for(int i=0;i<callbacks.length;i++) { WSPasswordCallback pc = (WSPasswordCallback)callbacks[i]; pc.setPassword("josen"); pc.setIdentifier("admin"); } } }