Already considered as the Java platform’s most widely used enterprise security framework with over , downloads from SourceForge. Probably this post is one of many Acegi Security Getting Started’s of the Spring framework: a basic Spring MVC tier and service tier that. Renaming Acegi Security to Spring Security reinforces its position in the already approve of Spring Framework, so the repositioning will help.
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However we at Amis just recently went thru it. Here is our step-by-step guide how to set up basic authentication and web request authorization. We used fgamework bit older version of the frameworks. We are going to add security measures to an existing fully insecure application created with the Spring framework.
This application can be downloaded here: Before you can go ahead with implementing security on this application, you should perform the following steps: Install Maven 2 http: Start up DOS prompt. Navigate to directory where project is located e. You should see the Maven log message that says that pallas Next, create Eclipse project by issuing command. Now you should see the message that says that Eclipse project has been written to local directory. Install Oracle XE database http: Modify data source URL jdbc: Select the project home directory acegi-laband click Finish.
It can be that Eclipse complains franework missing directory. This can be ignored. Restart Eclipse are you are framewor. Choose from Right-click menu: The application welcome page should appear. The first step in building up the security for this application is providing authentication. In Acegi the authentication is performed by aceyi AuthenticationManager. Therefore we need to create this class. As for most objects in Spring this is done by wiring it in the application context.
So we have to go to the context configuration file of our project. For convenience reasons this file is split into multiple files that contain bean definitions grouped according framewor their role within the application could be any division.
Now we are going to add yet another one to this list, named: Please add file securityContext. This file should have the following content:. As you can see this file expects a couple of frmaework definitions.
An arrow denotes a dependency that a bean has on another bean:. The order in which the filters are listed above, defines the order in which they are run. Next we add the bean definitions for the filters:.
Into these filters other beans are injected. We start with the AuthenticationManager, the bean that does the authentication:. In its turn the AuthenticationManager depends on one or more providers. We inject the DaoAuthenticationProvider, that is defined by:. Next we choose to inject a MemoryAuthenticationDao into the DaoAuthentiactionProvider, that on its turn is defined by:. A list of principals and their credentials are stored in memory.
Next we need to wire a couple of beans to finish this context file:.
Please save file securityContext. In order to use this securityContext, we need to add it to the list of context configuration locations in web. For help see solution 1 below. Next we need to register the FilterChainProxy bean in web.
In order to do so, add the following two XML elements to web. This should be placed before the servlet element. Now we add a login. Still, at this point of our building process, the authentication entry point, called login. In order to get this mapping right, we need to add a new URL mapping in context configuration XML file, called pallas-servlet.
Please add the mapping of login. For help see solution 2. This controller does not yet exist in our project, so we need to create it.
Now we switch to the Java classes. Please open package nl. This package contains controllers that are part of Spring MVC. Create Java file LoginController. Yep, we need to wire it in a context configuration file. Please try to add this bean to webContext.
For help see solution 3 below. When we run the application, we notice that authentication is not taken place. What would be the reason for this? Indeed, we still miss a frameworj of a URI pattern to a role, in order to trigger the authentication. Please modify the following files:. So far we have succeeded to get the authentication to work.
During this process we implemented authorization too, namely principals with the granted authorities employee and manager are allowed to enter the application and all of its secure pages. Now we will modify acegj authorization by implementing the requirement that only managers are allowed to add secueity employees. Please implement this requirement by modifying the ObjectDefinitionSource attribute of the FilterSecurityInterception.
One way to do this is adding the following line above the existing pattern:. This should be above the existing pattern because the patterns are evaluated from specific to seecurity generic.
Securing Your Java Applications – Acegi Security Style
So this results in:. The Acegi tag library offers the possibility to test the granted authorities of principals. So next we want to display the link to Add Employee page only when the user is a manager. Frameqork the authentication repository is located in a database that contains a list of principals and their granted authorities. Therefore we will build this in this lab.
Acegi Security for Dummies
Switching the type of the DaoAuthenticationProvider demonstrates the power of Spring. Because all we need to do is modify beans that are wired in the securityContext. Therefore we need to add the class to our project. Create a new package nl. This is indeed quite some code, and in fact we could have just a few lines or just XML declaration as we would be satisfied with the standard implementation, that is we would create a User object that just contains the attributes username, password and granted authoritieslist.
However in the example above we create a custom user, that also holds attributes like: The benefit of this is that at any place in the code of our application we can access the attributes and use this for our puposes. Please add class CustomUser. Hi Erik, I am a Java developer and the framework is Spring.
This Examples helps me a lot. It will be very helpfull for me if you provide an another complete example which includes the complete acigi security. Please give me an examples. I would like to thanks AMIS for publishing this article. It has been explained very nicely.
Thanks and Regards Sachin Mali. The User Name and passwords are stored in the database MySql.
What Is Spring Security? –
As I am new to these concepts, I am in desperate need. I would be obliged if you help me ata an earliest. I am using acegi 1. I was trying to override UsersByUsername Mapping but i couldnt manage. I finally figured out by customizing the CustomUser into the authentication. Since the authentication is in the SecureContext, I can either access the CustomUser aacegi my login jsp and put it to the session or I can access it at my regular servlet. Sounds like a valid business case and a good idea to switch to Spring gradually.
See the answer of Ben Alex at http: Now, that it works.