diff -r 000000000000 -r 6474c204b198 security/manager/ssl/public/nsIStreamCipher.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/manager/ssl/public/nsIStreamCipher.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,61 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+#include "nsIKeyModule.idl"
+
+interface nsIInputStream;
+
+/**
+ * Stream cipher interface.  We're basically copying the interface from
+ * nsICryptoHash interface.
+ */
+[scriptable, uuid(1d507cd6-1630-4710-af1b-4012dbcc514c)]
+interface nsIStreamCipher : nsISupports
+{
+    /**
+     * Initialize a stream cipher.
+     * @param aKey nsIKeyObject
+     */
+    void init(in nsIKeyObject aKey);
+
+    /**
+     * Initialize a stream cipher with an initialization vector.
+     * @param aKey nsIKeyObject
+     * @param aIV the initialization vector
+     * @param aIVLen the length of the initialization vector
+     */
+    void initWithIV(in nsIKeyObject aKey,
+                    [const, array, size_is(aIVLen)] in octet aIV,
+                    in unsigned long aIVLen);
+
+    /**
+     * Update from an array of bytes.
+     */
+    void update([const, array, size_is(aLen)] in octet aData, in unsigned long aLen);
+
+    /**
+     * Update from a stream.
+     */
+    void updateFromStream(in nsIInputStream aStream, in long aLen);
+
+    /**
+     * A more script friendly method (not in nsICryptoHash interface).
+     */
+    void updateFromString(in ACString aInput);
+
+    /**
+     * @param aASCII if true then the returned value is a base-64
+     *        encoded string.  if false, then the returned value is
+     *        binary data.
+     */
+    ACString finish(in boolean aASCII);
+
+    /**
+     * Discard aLen bytes of the keystream.
+     * These days 1536 is considered a decent amount to drop to get
+     * the key state warmed-up enough for secure usage.
+     */
+    void discard(in long aLen);
+};