Security Code Guidelines

These rules check the security guidelines from Sun, published at http://java.sun.com/security/seccodeguide.html#gcg

MethodReturnsInternalArray

Exposing internal arrays directly allows the user to modify some code that could be critical. It is safer to return a copy of the array.

This rule is defined by the following Java class: net.sourceforge.pmd.rules.sunsecure.MethodReturnsInternalArray

Here's an example of code that would trigger this rule:

			
  
  public class SecureSystem {
      UserData [] ud;
      
      public UserData [] getUserData() {
          // Don't return directly the internal array, return a copy 
          return ud;
      }
  }

ArrayIsStoredDirectly

Constructors and methods receiving arrays shuold clone objects and store the copy. This prevents that future changes from the user affect the internal functionallity.

This rule is defined by the following Java class: net.sourceforge.pmd.rules.sunsecure.ArrayIsStoredDirectly

Here's an example of code that would trigger this rule:

			
  
  public class Foo {
  private String [] x;
  
      public void foo (String [] param) {
          // Don't do this, make a copy of the array at least
          this.x=param;
      }
  }