2008年4月12日 edited by dingdangxiaoma
acegi安全是一个强大的,灵活的安全解决方案的企业软件,并特别着重于应用,利用spring。用acegi安全,为用户的应用与全面的认证,授权,例如基于职务的访问控制,通道安全和人类用户检测能力。(google 对acegid的翻译)
参考资料:http://www.tfo-eservices.eu/wb_tutorials/media/SpringAcegiTutorial/HTML/SpringAcegiTutorial-1_1-html.html
里面有一个例子:SpringAcegiTutorial,可以进行下载,并运行,做为一个实例,已经相当不错了。
讲述了admin ,user的登录问题。及权限控件,acegi 的配置。
这个例子是spring mvc + spring acegi 的例子,阅读前最好有spring mvc 的基础。这里只摘录简单的配置说明。
<!-- ****** START ACEGI Security Configuration *******-->
<!-- ======================== FILTER CHAIN ======================= -->
<!-- if you wish to use channel security, add "channelProcessingFilter," in front
of "httpSessionContextIntegrationFilter" in the list below -->
<bean id="filterChainProxy"
class="org.acegisecurity.util.FilterChainProxy">
<property name="filterInvocationDefinitionSource">
<value>
CONVERT_URL_TO_LOWERCASE_BEFORE_COMPARISON
PATTERN_TYPE_APACHE_ANT
/**=httpSessionContextIntegrationFilter,formAuthenticationProcessingFilter,exceptionTranslationFilter,filterSecurityInterceptor
</value>
</property>
</bean>
<!-- Start Security filter config -->
<bean id="exceptionTranslationFilter"
class="org.acegisecurity.ui.ExceptionTranslationFilter">
<property name="authenticationEntryPoint">
<ref bean="formLoginAuthenticationEntryPoint" />
</property>
</bean>
<!-- Define filter to handle BASIC authentication -->
<bean id="basicProcessingFilter"
class="org.acegisecurity.ui.basicauth.BasicProcessingFilter">
<property name="authenticationManager">
<ref bean="authenticationManager" />
</property>
<property name="authenticationEntryPoint">
<ref bean="authenticationEntryPoint" />
</property>
</bean>
<!-- Define realm for BASIC login-->
<bean id="authenticationEntryPoint"
class="org.acegisecurity.ui.basicauth.BasicProcessingFilterEntryPoint">
<property name="realmName">
<value>Spring Web Realm</value>
</property>
</bean>
<!-- Define filter to handle FORM authentication -->
<bean id="formAuthenticationProcessingFilter"
class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilter">
<property name="filterProcessesUrl">
<value>/j_acegi_security_check</value>
</property>
<property name="authenticationFailureUrl">
<value>/loginFailed.html</value>
</property>
<property name="defaultTargetUrl">
<value>/</value>
</property>
<property name="authenticationManager">
<ref bean="authenticationManager" />
</property>
</bean>
<!-- Define realm for FORM login-->
<bean id="formLoginAuthenticationEntryPoint"
class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilterEntryPoint">
<property name="loginFormUrl">
<value>/login.jsp</value>
</property>
<property name="forceHttps">
<value>false</value>
</property>
</bean>
<bean id="httpSessionContextIntegrationFilter"
class="org.acegisecurity.context.HttpSessionContextIntegrationFilter">
</bean>
<!-- End Security filter config -->
<!-- Start Security interceptor config -->
<!-- Define authentication manager, decision manager and secure URL patterns -->
<bean id="filterSecurityInterceptor"
class="org.acegisecurity.intercept.web.FilterSecurityInterceptor">
<property name="authenticationManager">
<ref bean="authenticationManager" />
</property>
<property name="accessDecisionManager">
<ref bean="accessDecisionManager" />
</property>
<property name="objectDefinitionSource">
<value>
CONVERT_URL_TO_LOWERCASE_BEFORE_COMPARISON
PATTERN_TYPE_APACHE_ANT
/secure/admin/*=ROLE_ADMIN
/secure/app/*=ROLE_USER
</value>
</property>
</bean>
<!-- End Security interceptor config -->
<!-- Start authentication config -->
<bean id="authenticationManager"
class="org.acegisecurity.providers.ProviderManager">
<property name="providers">
<list>
<ref bean="daoAuthenticationProvider" />
</list>
</property>
</bean>
<bean id="daoAuthenticationProvider"
class="org.acegisecurity.providers.dao.DaoAuthenticationProvider">
<property name="userDetailsService">
<ref bean="userDetailsService" />
</property>
</bean>
<!-- Authentication using In-memory Dao -->
<bean id="userDetailsService"
class="org.acegisecurity.userdetails.memory.InMemoryDaoImpl">
<property name="userMap">
<value>
jklaassen=4moreyears,ROLE_ADMIN
bouerj=ineedsleep,ROLE_USER
</value>
</property>
</bean>
<!-- Authentication using JDBC Dao -->
<!--
<bean id="userDetailsService"
class="org.acegisecurity.userdetails.jdbc.JdbcDaoImpl">
<property name="dataSource">
<ref bean="dataSource"/>
</property>
</bean>
-->
<!-- End authentication config -->
<!-- Start authorization config -->
<bean id="accessDecisionManager"
class="org.acegisecurity.vote.UnanimousBased">
<property name="decisionVoters">
<list>
<ref bean="roleVoter" />
</list>
</property>
</bean>
<bean id="roleVoter" class="org.acegisecurity.vote.RoleVoter">
<property name="rolePrefix">
<value>ROLE_</value>
</property>
</bean>
<!-- End authorization config -->
<!-- ****** END ACEGI Security Configuration *******-->
以上就是所有的源代码配置在spring 的配置文件中。详细的说明在官方的文档上。
在上面的配置文件的方式是以in-memory 的方法,也就是在配置文件中指定登录的用户名及密码。在实际的应用中,应用到数据库或其它技术。
<bean id="userDetailsService"
class="org.acegisecurity.userdetails.jdbc.JdbcDaoImpl">
<property name="dataSource">
<ref bean="dataSource"/>
</property>
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>com.mysql.jdbc.Driver</value>
</property>
<property name="url">
<value>jdbc:mysql://localhost:3306/test</value>
</property>
<property name="username">
<value>root</value>
</property>
<property name="password">
<value>1</value>
</property>
</bean>
以上两个bean的代码就是把信息存储到数据库中。
sql 语句如下:
CREATE TABLE `users` (
`username` varchar(50) NOT NULL,
`password` varchar(50) NOT NULL,
`enabled` varchar(50) NOT NULL,
PRIMARY KEY (`username`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO `users` VALUES ('dianne','emu','true');
INSERT INTO `users` VALUES ('marissa','koala','true');
INSERT INTO `users` VALUES ('peter','opal','true');
INSERT INTO `users` VALUES ('scott','wombat','true');
CREATE TABLE `authorities` (
`username` varchar(50) NOT NULL,
`authority` varchar(50) NOT NULL,
UNIQUE KEY `ix_auth_username` (`username`,`authority`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO `authorities` VALUES ('dianne','ROLE_ADMIN');
INSERT INTO `authorities` VALUES ('marissa','ROLE_ADMIN');
INSERT INTO `authorities` VALUES ('marissa','ROLE_USER');
INSERT INTO `authorities` VALUES ('peter','ROLE_USER');
INSERT INTO `authorities` VALUES ('scott','ROLE_ADMIN');
ALTER TABLE `authorities`
ADD FOREIGN KEY (`username`) REFERENCES `users` (`username`);
所有的配置就是这些:
理解一下原理:
1。acegi的添加,可以在程序写完之后再添加,配置灵活但并不简单。
2.四个步骤:
安全是实施这四项检查:
1 限制出入检查(是以资源担保? ) ;
2 现有的认证检查(有用户被认证? ) ;
3 如果没有有效的登录用户:认证要求退房(都是正确的用户名和密码提供? ) ;
4 授权入住(不含用户拥有所需的角色? ) ;
3.对于授权的处理,未授权的用户无法进行访问。应该设置 403.jsp未授权页面。