Spring security provides method level security using @PreAuthorize and @PostAuthorize.
This is expression-based access control. @PreAuthorize can check for authorization
before entering into method.
@PreAuthorize is checked on the basis of role or the argument which is passed to the
method.
@PostAuthorize checks for authrorisation after method execution. @PostAuthorize can
be authorized on the basis of logged in roles,
return object by method and passed argument to the method.
For the returned object spring security provides built-in keyword i.e. returnObject.
We need to define @PreAuthorize and @PostAuthorize in the interface of the service layer.
STEP 1:- Open Eclipse and Create Dynamic Web Project named SpringSecurityMethodLevelXMLConfig
STEP 2:- Make sure you use Target Runtime as Apache Tomcat 7.0.
STEP 3:- copy below jars to WEB-INF/lib folder.
STEP 6 :- Map Spring configuration files in /WebContent/WEB-INF/web.xml file as below :-
STEP 9 :- Create Service Impl Class.
http://localhost:8080/SpringSecurityMethodLevelXMLConfig/
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We need to define @PreAuthorize and @PostAuthorize in the interface of the service layer.
STEP 1:- Open Eclipse and Create Dynamic Web Project named SpringSecurityMethodLevelXMLConfig
STEP 2:- Make sure you use Target Runtime as Apache Tomcat 7.0.
STEP 3:- copy below jars to WEB-INF/lib folder.
- aopalliance-1.0.jar
- commons-logging-1.2.jar
- spring-aop-4.1.4.RELEASE.jar
- spring-beans-4.1.4.RELEASE.jar
- spring-context-4.1.4.RELEASE.jar
- spring-core-4.1.4.RELEASE.jar
- spring-expression-4.1.4.RELEASE.jar
- spring-security-config-4.0.2.RELEASE.jar
- spring-security-core-4.0.2.RELEASE.jar
- spring-security-taglibs-4.0.2.RELEASE.jar
- spring-security-web-4.0.2.RELEASE.jar
- spring-web-4.1.4.RELEASE.jar
- spring-webmvc-4.1.4.RELEASE.jar
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <context:component-scan base-package="com.tutorialsdesk.controller" /> <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/views/" /> <property name="suffix" value=".jsp" /> </bean> <mvc:annotation-driven/> </beans>STEP 5:- Create Spring security configuration file. /WebContent/WEB-INF/spring-security.xml
<beans:beans xmlns="http://www.springframework.org/schema/security" xmlns:beans="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security.xsd"> <http auto-config="true" > <intercept-url pattern="/home" access="hasAnyRole('ROLE_READ','ROLE_WRITE','ROLE_NONE')" /> <!-- access denied page--> <access-denied-handler error-page="/Access_Denied" /> <form-login login-processing-url="/login" login-page="/login" default-target-url="/home" username-parameter="username" password-parameter="password" authentication-failure-url="/login?error"/> </http> <authentication-manager > <authentication-provider> <user-service> <user name="admin" password="123456" authorities="ROLE_READ,ROLE_WRITE" /> <user name="reader" password="123456" authorities="ROLE_READ" /> <user name="user" password="123456" authorities="ROLE_NONE" /> </user-service> </authentication-provider> </authentication-manager> <!-- <global-method-security secured-annotations="enabled"/> --> <global-method-security pre-post-annotations="enabled"/> <beans:bean id="customService" class="com.tutorialsdesk.service.CustomServiceImpl" /> </beans:beans>In order to enable Spring Method level Security, we need to add <global-method-security pre-post-annotations="enabled"/> in security context file, as shown above.
STEP 6 :- Map Spring configuration files in /WebContent/WEB-INF/web.xml file as below :-
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <display-name>SpringSecurityMethodLevelXMLConfig</display-name> <servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <context-param> <param-name>contextConfigLocation</param-name> <param-value> /WEB-INF/spring-security.xml </param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <filter> <filter-name>springSecurityFilterChain</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> </filter> <filter-mapping> <filter-name>springSecurityFilterChain</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>STEP 7 :- Create Model Class.
- Package: com.tutorialsdesk.model
- Filename: Folder.java
package com.tutorialsdesk.model; public class Folder { private String folderName; private String owner; public Folder(String folderName, String owner) { super(); this.folderName = folderName; this.owner = owner; } public String getFolderName() { return folderName; } public void setFolderName(String folderName) { this.folderName = folderName; } public String getOwner() { return owner; } public void setOwner(String owner) { this.owner = owner; } }STEP 8 :- Create Service Interface.
- Package: com.tutorialsdesk.service
- Filename: CustomService.java
package com.tutorialsdesk.service; import org.springframework.security.access.prepost.PostAuthorize; import org.springframework.security.access.prepost.PreAuthorize; import com.tutorialsdesk.model.Folder; public interface CustomService { @PreAuthorize ("hasRole('ROLE_WRITE')") public void addFolder(Folder folder); @PostAuthorize ("hasRole('ROLE_READ')") public Folder getFolder(); @PostAuthorize ("returnObject.owner == authentication.name") public Folder getFolderByOwnerName(); @PreAuthorize ("#folder.owner == authentication.name") public void deleteFolder(Folder folder); }Look at the interface how to define @PreAuthorize and @PostAuthorize. authentication and principal keyword can directly be used to access user information. # is used to access argument of the method. Take attention on @PostAuthorize, built-in keyword returnObject has been used. Here returnObject is equivalent to Book instance returned by the method.
STEP 9 :- Create Service Impl Class.
- Package: com.tutorialsdesk.service
- Filename: CustomServiceImpl.java
package com.tutorialsdesk.service; import org.springframework.stereotype.Service; import com.tutorialsdesk.model.Folder; @Service public class CustomServiceImpl implements CustomService { @Override public void addFolder(Folder folder) { System.out.println("You have successfully added Folder."); } @Override public Folder getFolder() { Folder folder = new Folder("PQR","reader"); return folder; } @Override public Folder getFolderByOwnerName() { Folder folder = new Folder("XYZ","admin"); return folder; } @Override public void deleteFolder(Folder folder) { System.out.println("Folder deleted"); } }STEP 10 :- Create Controller Class.
- Package: com.tutorialsdesk.controller
- Filename: IndexController.java
package com.tutorialsdesk.controller; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.security.core.Authentication; import org.springframework.security.core.context.SecurityContextHolder; import org.springframework.security.core.userdetails.UserDetails; import org.springframework.security.web.authentication.logout.SecurityContextLogoutHandler; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import com.tutorialsdesk.model.Folder; import com.tutorialsdesk.service.CustomService; @Controller public class IndexController { @Autowired private CustomService customService; @RequestMapping(value = {"/", "/login" }, method = RequestMethod.GET) public String loginPage(ModelMap model, @RequestParam(value = "error", required = false) String error) { if (error != null) { model.addAttribute("error", "Invalid username and password!"); } return "login"; } @RequestMapping(value = { "/home" }, method = RequestMethod.GET) public String homePage(ModelMap model) { return "welcome"; } @RequestMapping(value = { "/secureRead" }, method = RequestMethod.GET) public String secureReadPage(ModelMap model) { Folder folder=customService.getFolder(); model.addAttribute("folder", folder.getFolderName()); return "secure"; } @RequestMapping(value = { "/secureWrite" }, method = RequestMethod.GET) public String secureWritePage(ModelMap model) { customService.getFolder(); Folder folder=customService.getFolderByOwnerName(); model.addAttribute("folder", folder.getFolderName()); Folder folder1 = new Folder("ABC","reader"); customService.addFolder(folder1); model.addAttribute("addedfolder", folder1.getFolderName()); Folder folder2 = new Folder("XYZ","admin"); customService.deleteFolder(folder2); model.addAttribute("deletedfolder", folder2.getFolderName()); return "secure"; } @RequestMapping(value="/logout", method = RequestMethod.GET) public String logoutPage (ModelMap model,HttpServletRequest request, HttpServletResponse response) { Authentication auth = SecurityContextHolder.getContext().getAuthentication(); if (auth != null){ new SecurityContextLogoutHandler().logout(request, response, auth); } model.addAttribute("msg", "You've been logged out successfully."); return "login"; } @RequestMapping(value = "/Access_Denied", method = RequestMethod.GET) public String accessDeniedPage(ModelMap model) { model.addAttribute("user", getPrincipal()); return "accessDenied"; } private String getPrincipal(){ String userName = null; Object principal = SecurityContextHolder.getContext().getAuthentication().getPrincipal(); if (principal instanceof UserDetails) { userName = ((UserDetails)principal).getUsername(); } else { userName = principal.toString(); } return userName; } }STEP 11 :- Create jsp files in /WebContent/WEB-INF/views folder
- Filename: login.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <%@page session="true"%> <html> <head> <title>Login Page</title> <style> .error { padding: 15px; margin-bottom: 20px; border: 1px solid transparent; border-radius: 4px; color: #a94442; background-color: #f2dede; border-color: #ebccd1; } .msg { padding: 15px; margin-bottom: 20px; border: 1px solid transparent; border-radius: 4px; color: #31708f; background-color: #d9edf7; border-color: #bce8f1; } #login-box { width: 300px; padding: 20px; margin: 100px auto; background: #fff; -webkit-border-radius: 2px; -moz-border-radius: 2px; border: 1px solid #000; } </style> </head> <body onload='document.loginForm.username.focus();'> <h1>Spring Security Login Form (Method Level Security)</h1> <div id="login-box"> <h2>Login with Username and Password</h2> <c:if test="${not empty error}"> <div class="error">${error}</div> </c:if> <c:if test="${not empty msg}"> <div class="msg">${msg}</div> </c:if> <form name='loginForm' action="<c:url value='/login' />" method='POST'> <table> <tr> <td>User:</td> <td><input type='text' name='username'></td> </tr> <tr> <td>Password:</td> <td><input type='password' name='password' /></td> </tr> <tr> <td colspan='2'><input name="submit" type="submit" value="submit" /></td> </tr> </table> <input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}" /> </form> </div> </body> </html>
- Filename: welcome.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <%@ taglib prefix="sec" uri="http://www.springframework.org/security/tags"%> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Welcome page</title> </head> <body> Dear <strong>${user}</strong>, Welcome to Home Page. <a href="<c:url value="/logout" />">Logout</a> <br/> <br/> <div> <label>View all information| This part is visible to Everyone</label> </div> <br/> <br/> <div> Please click this to visit to Read <a href="<c:url value="/secureRead" />">Secure</a> Page. </div> <br/> <div> Please click this to visit to Write <a href="<c:url value="/secureWrite" />">Secure</a> Page. </div> <br/> <div> <sec:authorize access="hasRole('ADMIN')"> <label><a href="#">Edit this page</a> | This part is visible only to ADMIN</label> </sec:authorize> </div> <br/> <div> <sec:authorize access="hasRole('API')"> <label><a href="#">Start backup</a> | This part is visible only to one who has API rights.</label> </sec:authorize> </div> <br/> <div> <sec:authorize access="hasRole('ADMIN') and hasRole('API')"> <label><a href="#">Start backup</a> | This part is visible only to one who is both ADMIN & API</label> </sec:authorize> </div> </html>
- Filename: secure.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <%@ taglib prefix="sec" uri="http://www.springframework.org/security/tags"%> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Welcome page</title> </head> <body> Dear <strong>${user}</strong>, Welcome to Secured Page. <a href="<c:url value="/home" />">Home</a> <a href="<c:url value="/logout" />">Logout</a> <br/> <br/> <div> <sec:authorize access="hasRole('READ')"> <label>Folder : ${folder} </label> </sec:authorize> <br/> </div> <div> <sec:authorize access="hasRole('WRITE')"> <c:if test="${not empty folder}"> <label>Folder : ${folder} </label> </c:if> <br/> <c:if test="${not empty addedfolder}"> <label>Added Folder : ${addedfolder} </label> </c:if> <br/> <c:if test="${not empty deletedfolder}"> <label>Deleted Folder : ${deletedfolder} </label> </c:if> </sec:authorize> </div> </body> </html>
- Filename: accessDenied.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>AccessDenied page</title> </head> <body> Dear <strong>${user}</strong>, You are not authorized to access this page <br/><br/><a href="<c:url value="/home" />">Home</a> | <a href="<c:url value="/logout" />">Logout</a> </body> </html>STEP 12 :- Run your project enter below URL in your browser
http://localhost:8080/SpringSecurityMethodLevelXMLConfig/
Keep visiting TutorialsDesk for more tutorials and practical programming examples on Spring MVC. Hope we are able to explain you Spring MVC Method level security using @PreAuthorize and @PostAuthorize Example, if you have any questions or suggestions please write to us using contact us form.
Please share us on social media if you like the tutorial.
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