2 files changed, 64 insertions, 0 deletions
diff --git a/das-java/contrib/ldap/das.ldap/src/main/java/org/apache/tuscany/das/ldap/encryption/constants/EncryptionConstants.java b/das-java/contrib/ldap/das.ldap/src/main/java/org/apache/tuscany/das/ldap/encryption/constants/EncryptionConstants.java
new file mode 100644
index 0000000000..59b726b4f3
--- /dev/null
+++ b/das-java/contrib/ldap/das.ldap/src/main/java/org/apache/tuscany/das/ldap/encryption/constants/EncryptionConstants.java
@@ -0,0 +1,26 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you 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.apache.tuscany.das.ldap.encryption.constants;
+
+public interface EncryptionConstants
+{
+    String MD5 = "MD5";
+    String SHA1 = "SHA-1";//Produces longer hashes than MD5
+}
diff --git a/das-java/contrib/ldap/das.ldap/src/main/java/org/apache/tuscany/das/ldap/encryption/util/ChecksumUtils.java b/das-java/contrib/ldap/das.ldap/src/main/java/org/apache/tuscany/das/ldap/encryption/util/ChecksumUtils.java
new file mode 100644
index 0000000000..7c77ddf510
--- /dev/null
+++ b/das-java/contrib/ldap/das.ldap/src/main/java/org/apache/tuscany/das/ldap/encryption/util/ChecksumUtils.java
@@ -0,0 +1,38 @@
+
+package org.apache.tuscany.das.ldap.encryption.util;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+import org.apache.tuscany.das.ldap.encryption.constants.EncryptionConstants;
+
+public class ChecksumUtils
+implements EncryptionConstants
+{
+    public static String computeMD5Hash(String string) 
+    throws NoSuchAlgorithmException
+    {
+        MessageDigest messageDigest = MessageDigest.getInstance(MD5);
+        
+        byte[] digest               = 
+            messageDigest.digest(string.getBytes());
+    
+        StringBuffer hexString = new StringBuffer();
+        for (int i=0;i<digest.length;i++) {
+          hexString.append (
+            Integer.toHexString(0xFF & digest[i]));
+        }
+    
+        char[] hexStringCharacters = hexString.toString().toCharArray();
+        String checksum = "";
+        
+        for( char i : hexStringCharacters)
+        {
+            int ascii = (int) i;
+            checksum = checksum + Integer.toString(ascii);
+        }
+ 
+        return checksum;
+    }
+
+}