--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dcrypt/crypto/PRNG.d	Tue Nov 18 18:03:40 2008 -0500
@@ -0,0 +1,45 @@
+/**
+ * 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.PRNG;
+
+public import dcrypt.crypto.errors.ShortBufferError;
+public import dcrypt.crypto.errors.NotInitializedError;
+public import dcrypt.crypto.errors.InvalidParameterError;
+public import dcrypt.crypto.errors.NotSupportedError;
+
+/** Relatively simple interface for PRNGs. */
+abstract class PRNG {
+    
+    protected bool _initialized;
+    
+    /** Returns: The name of the PRNG. */
+    char[] name();
+    
+    /** Returns: Whether or not the PRNG has been initialized. */
+    bool initialized() {
+        return _initialized;
+    }
+    
+    /**
+     * Introduce entropy into the PRNG. An initial call to this is
+     * usually required for seeding.
+     * 
+     * Params:
+     *     input = Bytes to introduce into the PRNG as entropy
+     */
+    void addEntropy(ubyte[] input);
+    
+    /**
+     * Read bytes from the keystream of the PRNG into output.
+     * 
+     * Params:
+     *     output = Array to fill with the next bytes of the keystream
+     */
+    uint read(ubyte[] output);
+}