--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dcrypt/crypto/padding/NullByte.d	Sun Aug 10 14:20:17 2008 -0400
@@ -0,0 +1,44 @@
+/**
+ * This file is part of the dcrypt project.
+ *
+ * Copyright: Copyright (C) dcrypt contributors 2008. All rights reserved.
+ * License:   MIT
+ * Authors:   Thomas Dixon
+ */
+
+module dcrypt.crypto.padding.NullByte;
+
+import dcrypt.crypto.BlockCipherPadding; 
+
+/**
+ * This class implements Null/Zero byte padding.
+ * Ex. [... 0x00, 0x00 ... 0x00]
+ */
+class NullByte : BlockCipherPadding {
+    char[] name() {
+        return "NullByte";   
+    }
+    
+    /* Assumes input_ is a multiple of the underlying
+     * block cipher's block size.
+     */
+    uint padBlock(void[] input_, uint inOff) {
+        ubyte[] input = cast(ubyte[]) input_;
+
+        uint len = (input.length - inOff);
+        
+        input[inOff..input.length] = 0;
+
+        return len;
+    }
+    
+    uint padLength(void[] input_) {
+        ubyte[] input = cast(ubyte[]) input_;
+        
+        uint len = input.length;
+        while (len-- > 0)
+            if (input[len-1] != 0) break;
+            
+        return (input.length - len);
+    }
+}