Subject.java (doAsPrivileged): If acc is null, create a new AccessControlContext.

2005-02-08  Andrew Haley  <aph@redhat.com>

        * javax/security/auth/Subject.java (doAsPrivileged): If acc is
        null, create a new AccessControlContext.
        * java/security/SecureClassLoader.java (protectionDomainCache):
        new field.
        (defineClass): Create a new protection domain and add it to our
        cache.

        * java/rmi/server/UnicastRemoteObject.java (exportObject): Call
        addStub() to keep track of the stub we've exported.
        (unexportObject): Call deleteStub().
        * java/rmi/server/RemoteObject.java (stubs): New field.
        (addStub): New method.
        (deleteStub): New method.
        (toStub): Rewrite.

        * java/lang/VMCompiler.java (loadSharedLibrary): Pass
        true to findHelper (tryParents).
        * gnu/gcj/runtime/SharedLibLoader.java (SharedLibLoader):
        Likewise.
        * java/net/URLClassLoader.java (SoURLLoader): Likewise.
        * gnu/gcj/runtime/SharedLibHelper.java (SharedLibHelper): Pass
        ProtectionDomain.
        If tryParents is false, don't scan parent class loaders.

        * java/security/Permissions.java (PermissionsHash.implies):
        Iterate over the collection and invoke implies() on each
        element.

From-SVN: r95111

libjava/java/lang/VMCompiler.java

@@ -142,7 +142,8 @@ final class VMCompiler
   {
     Class c = null;
     SharedLibHelper helper 
-      = SharedLibHelper.findHelper (loader, fileName, domain.getCodeSource());
+	= SharedLibHelper.findHelper (loader, fileName, domain.getCodeSource(), 
+				      domain, false);
     c = helper.findClass (className);
     if (c != null)
       {

libjava/java/net/URLClassLoader.java

@@ -543,7 +543,7 @@ public class URLClassLoader extends SecureClassLoader
     {
       super(classloader, url, overrideURL);
       helper = SharedLibHelper.findHelper(classloader, url.getFile(),
-					  noCertCodeSource);
+					  noCertCodeSource, true);
     }
 
     Class getClass(String className)

libjava/java/rmi/server/RemoteObject.java

@@ -45,6 +45,7 @@ import java.lang.reflect.Constructor;
 import java.rmi.NoSuchObjectException;
 import java.rmi.Remote;
 import java.rmi.UnmarshalException;
+import java.util.WeakHashMap;
 
 public abstract class RemoteObject
 	implements Remote, Serializable {
@@ -53,6 +54,8 @@ public static final long serialVersionUID = -3215090123894869218l;
 
 protected transient RemoteRef ref;
 
+private static final WeakHashMap stubs = new WeakHashMap();
+
 protected RemoteObject() {
 	this(null);
 }
@@ -65,21 +68,24 @@ public RemoteRef getRef() {
 	return (ref);
 }
 
+synchronized static void addStub(Remote obj, Remote stub)
+{
+  stubs.put(obj, stub);
+}
+
+synchronized static void deleteStub(Remote obj)
+{
+  stubs.remove(obj);
+}
+
   public static Remote toStub(Remote obj) throws NoSuchObjectException 
   {
-    Class cls = obj.getClass();
-    String classname = cls.getName();
-    ClassLoader cl = cls.getClassLoader();
-    try 
-      {
-	Class scls = cl.loadClass(classname + "_Stub");
-	// JDK 1.2 stubs
-	Class[] stubprototype = new Class[] { RemoteRef.class };
-	Constructor con = scls.getConstructor(stubprototype);
-	return (Remote)(con.newInstance(new Object[]{obj}));
-      }
-    catch (Exception e) {}
-    throw new NoSuchObjectException(obj.getClass().getName());
+    Remote stub = (Remote)stubs.get(obj);
+
+    if (stub == null)
+      throw new NoSuchObjectException(obj.getClass().getName());
+
+    return stub;
   }
 
 public int hashCode() {

libjava/java/rmi/server/UnicastRemoteObject.java

@@ -98,7 +98,9 @@ public static RemoteStub exportObject(Remote obj) throws RemoteException {
       {
 	sref = new UnicastServerRef(new ObjID (), port, ssf);
       }
-    return (sref.exportObject (obj)); 
+    Remote stub = sref.exportObject (obj); 
+    addStub(obj, stub);
+    return stub;
   }
 
   /**
@@ -116,12 +118,15 @@ public static RemoteStub exportObject(Remote obj) throws RemoteException {
   {
     if (obj instanceof RemoteObject)
       {
+	deleteStub(obj);
 	UnicastServerRef sref = (UnicastServerRef)((RemoteObject)obj).getRef();
 	return sref.unexportObject(obj, force);
       }
     else
-      //FIX ME
-      ;
+      {
+	//FIX ME
+	;
+      }
     return true;
   }
 

libjava/java/security/Permissions.java

@@ -228,9 +228,18 @@ class PermissionsHash extends PermissionCollection
    * @param perm the permission to check
    * @return true if it is implied
    */
+  // FIXME: Should this method be synchronized?
   public boolean implies(Permission perm)
   {
-    return perms.get(perm) != null;
+    Enumeration elements = elements();
+
+    while (elements.hasMoreElements())
+      {
+	Permission p = (Permission)elements.nextElement();
+	if (p.implies(perm))
+	  return true;
+      }
+    return false;
   }
 
   /**

libjava/java/security/SecureClassLoader.java

@@ -48,6 +48,8 @@ package java.security;
  */
 public class SecureClassLoader extends ClassLoader
 {
+  java.util.WeakHashMap protectionDomainCache = new java.util.WeakHashMap();
+
   protected SecureClassLoader(ClassLoader parent)
   {
     super(parent);
@@ -80,11 +82,29 @@ public class SecureClassLoader extends ClassLoader
   protected final Class defineClass(String name, byte[] b, int off, int len,
 				    CodeSource cs)
   {
-    // FIXME: Need to cache ProtectionDomains according to 1.3 docs.
     if (cs != null)
       {
-	ProtectionDomain protectionDomain
-          = new ProtectionDomain(cs, getPermissions(cs), this, null);
+	ProtectionDomain protectionDomain;
+	  
+	synchronized (protectionDomainCache)
+	  {
+	    protectionDomain = (ProtectionDomain)protectionDomainCache.get(cs);
+	  }
+
+	if (protectionDomain == null)
+	  {
+	    protectionDomain 
+	      = new ProtectionDomain(cs, getPermissions(cs), this, null);
+	    synchronized (protectionDomainCache)
+	      {
+		ProtectionDomain domain 
+		  = (ProtectionDomain)protectionDomainCache.get(cs);
+		if (domain == null)
+		  protectionDomainCache.put(cs, protectionDomain);
+		else
+		  protectionDomain = domain;
+	      }
+	  }
 	return super.defineClass(name, b, off, len, protectionDomain);
       } 
     else