--- a/dcrypt/crypto/Hash.d	Tue Aug 12 05:48:06 2008 -0400
+++ b/dcrypt/crypto/Hash.d	Wed Aug 13 22:01:19 2008 -0400
@@ -17,17 +17,20 @@
 		MODE_SHA,
 		MODE_TIGER
 	}
-	private ubyte[] buffer;
-	uint bytes,
-		 index;
-	
+    
+	protected {
+        ubyte[] buffer;
+        uint bytes,
+             index;
+    }
+        
 	this (void[] input_=null) {
 		buffer = new ubyte[blockSize];
         ubyte[] input = cast(ubyte[]) input_;
         if (input)
             update(input);
 	}
-
+    
 	/** Returns: The block size of the hash function in bytes. */
 	abstract uint blockSize();
 	
@@ -36,7 +39,10 @@
 	
 	/** Returns: The name of the algorithm we're implementing. */
 	abstract char[] name();
-	
+    
+    /** Returns: A copy of this hash object. */
+    abstract Hash copy();
+
 	/**
 	 * Introduce data into the hash function.
 	 *