--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.security.sasl/share/classes/com/sun/security/sasl/digest/SecurityCtx.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.security.sasl.digest;
+
+import javax.security.sasl.SaslException;
+
+/**
+  * Interface used for classes implementing integrity checking and privacy
+  * for DIGEST-MD5 SASL mechanism implementation.
+  *
+  * @see <a href="http://www.ietf.org/rfc/rfc2831.txt">RFC 2831</a>
+  * - Using Digest Authentication as a SASL Mechanism
+  *
+  * @author Jonathan Bruce
+  */
+
+interface SecurityCtx {
+
+    /**
+     * Wrap out-going message and return wrapped message
+     *
+     * @throws SaslException
+     */
+    byte[] wrap(byte[] dest, int start, int len)
+        throws SaslException;
+
+    /**
+     * Unwrap incoming message and return original message
+     *
+     * @throws SaslException
+     */
+    byte[] unwrap(byte[] outgoing, int start, int len)
+        throws SaslException;
+}