barcode in vb.net 2008 10: Security in Java

Making QR in Java 10: Security

10: Security
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Here is the <login-config> excerpt that uses BASIC authentication. Note that the realm-name is used only in BASIC authentication.
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... <login-config> <auth-method>BASIC</auth-method> <realm-name>weblogic</realm-name> </login-config> ...
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Here is the <login-config> excerpt that uses DIGEST authentication:
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... <login-config> <auth-method>DIGEST</auth-method> </login-config> ... Here is the <login-config> excerpt that uses CLIENT-CERT authentication. ... <login-config> <auth-method>CLIENT-CERT</auth-method> </login-config> ...
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With BASIC authentication, the browser displays and controls the login process and user interface. The browser will display a simple dialog box prompting for user name and password. With FORM authentication, the web application defines and therefore controls the login process to a greater extent. Here is some example code for a login form:
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<head><title>Security Demo: login</title></head> <h2>Login</h2> Please authenticate yourself: <form method="POST" action="j_security_check"> Username: <input type="text" name="j_username"><br /> Password: <input type="password" name="j_password"><br /> <br /> <input type="submit" value="Login"> <input type="reset" value="Reset"> </form> <p><a href="index.html">home</a> </html>
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Identify Locations for Implementation of Security Features
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Here is the code for loginError.html:
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<head><title>Security Demo: login error</title></head> <h2>Login Error</h2> <hr width="100%"> Invalid username/password. <br /> <p><a href="index.html">home</a> </body> </html>
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In FORM-based authentication, the web container performs the authentication check. It does so according to the servlet specification, which specifies that the form method must be a POST, the name of the action must be j_security_check, and the names of the user name and password fields must be j_username and j_password, respectively. When the container sees the j_security_check action, it uses an internal mechanism to authenticate the caller. If the logon is authenticated and authorized to access the secured resource, the container produces a session ID to identify a logon session for the caller. The container maintains the logon session ID within a cookie. The server sends the cookie back to the client, and the client caller must then send this cookie back on all subsequent requests. If the authentication fails, the page identified by the <form-error-page> is returned to the client. As mentioned, FORM-based authentication is still not secure by default. But it can be made more secure by conducting it over a secure channel by specifying a transport guarantee for the secured resource. For example, use <transportguarantee>SSL</transport-guarantee>.
Authentication in the Enterprise Information System Layer
When JEE components need to access and therefore integrate with EISs, they may need to employ alternative mechanisms for security. In addition, they most likely will be operating from protected domains that do not cover the EIS resources they need to access. To provide for these situations, the calling container can be set up to manage the calling component s authentication for the resource. This is known as container-managed resource manager sign-on. The JEE architecture also provides the ability to specify the caller s credentials. This is known as application-managed resource manager sign-on. Within the deployment descriptor, the <resource-ref> element specifies a resource called by a component. The <res-auth> element specifies whether the resource sign-on is to be handled by the container or the application. Components that use applicationmanaged resource manager sign-on can use either the getUserPrincipal()
10: Security
(for web components) or getCallerPrincipal() (for EJB components) method to access the identity of the caller. This identity can then be mapped according to the requirements of the EIS. When container-managed resource manager sign-on is used, the container takes care of the mapping for the component.
Identity Selection
In a JEE server-side component, the container sets up the identity when the component calls another JEE component. The identity that is created is dependent on the identity selection policy specified in the deployment descriptor. For the identity selection policy, the deployer can specify either a <use-caller-identity> element or a <run-as> element. Component identity selection policies may be defined for web and EJB resources. When <use-caller-identity> is specified, the container uses the identity of a component s caller in all subsequent calls made by the component. When the <runas> element is specified, the container uses the identity specified within the element. In short, <use-caller-identity> maintains accountability and traceability for actions taken by components, and <run-as> can quickly give the caller privileges that their own identity lacks. The following EJB deployment descriptor snippet shows examples of both types of client identity selection policy:
//Configuring EJB Component Identity Selection Policies <enterprise-beans> <entity> <security-identity> <use-caller-identity/> </security-identity> ... </entity> <session> <security-identity> <run-as> <role-name>guest</role-name> </run-as> </security-identity> ... </session> ... </enterprise-beans>
The following deployment descriptor snippet shows an example of client identity selection policy for a web component. Note that when a <run-as> element is not specified, the use-caller-identity policy is assumed.
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