SecurityManager getSecurityContext() Method

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Description

The java.lang.SecurityManager.getSecurityContext() method creates an object that encapsulates the current execution environment. The result of this method is used, for example, by the three-argument checkConnect method and by the two-argument checkRead method. These methods are needed because a trusted method may be called on to read a file or open a socket on behalf of another method. The trusted method needs to determine if the other (possibly untrusted) method would be allowed to perform the operation on its own. The default implementation of this method is to return an AccessControlContext object.

Declaration

Following is the declaration for java.lang.SecurityManager.getSecurityContext() method

public Object getSecurityContext()

Parameters

NA

Return Value

This method returns an implementation-dependent object that encapsulates sufficient information about the current execution environment to perform some security checks later.

Exception

NA

Example

Our examples require that the permissions for each command is blocked. A new policy file was set that allows only the creating and setting of our Security Manager. The file is in C:/java.policy and contains the following text −

grant {
   permission java.lang.RuntimePermission "setSecurityManager";
   permission java.lang.RuntimePermission "createSecurityManager";
   permission java.lang.RuntimePermission "usePolicy";
};

The following example shows the usage of lang.SecurityManager.getSecurityContext() method.

package com.tutorialspoint;

public class SecurityManagerDemo {

   public static void main(String[] args) {

      // set the policy file as the system securuty policy
      System.setProperty("java.security.policy", "file:/C:/java.policy");

      // create a security manager
      SecurityManager sm = new SecurityManager();

      // set the system security manager
      System.setSecurityManager(sm);

      // get the security context
      Object con = sm.getSecurityContext();

      // print the class context
      System.out.println("" + con);
   }
}

Let us compile and run the above program, this will produce the following result −

java.security.AccessControlContext@5f186fab