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[utils] / security / usermgt / src / main / java / org / wamblee / security / authentication / MessageDigester.java

diff --git a/security/usermgt/src/main/java/org/wamblee/security/authentication/MessageDigester.java b/security/usermgt/src/main/java/org/wamblee/security/authentication/MessageDigester.java
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+/*
+ * Copyright 2005-2010 the original author or authors.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */ 
+package org.wamblee.security.authentication;
+
+/**
+ * Utility class that encapsulates a message digest method.
+ */
+public interface MessageDigester {
+    /**
+     * Computes a message digest for a value and encodes it in some way.
+     * 
+     * @param aValue
+     *            Value to compute digest for.
+     * 
+     * @return Encoded digest.
+     */
+    String hash(String aValue);
+}