/*******************************************************************************
 * Copyright (c) 2007, 2008 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

This is a JNI bridge to access native Windows encryption methods from Java. The methods
perform user-specific encryption of the data. The same user can later decrypt data using 
methods provided by this DLL. A different user won't be able to decrypt the data. 

If the user has a roaming profile, he can decrypt data on a different computer in the domain.

In the event if stand-alone computer needs to have OS re-installed (or the domain controller
and the computer in the domain), be sure to create Windows password recovery disk BEFORE 
re-installing the operating system.

Note that this mechanism is intended to be used with small size data (i.e., passwords). For 
large amount of data consider encrypting your password using this mechanism and using 
symmetric encryption to encrypt the data.

To compile this DLL:
=> JAVA_HOME environment variable needs to be setup so that jni.h can be found

Note C++ projects settings:
=> Additional include directories - "$(JAVA_HOME)/include";"$(JAVA_HOME)/include/win32"
=> Additional linker dependency - Crypt32.lib

ON THE SUBJECT OF RUNTIME LIBRARY

The original DLL was build using Visual Studio 2005. That introduced dependency on 
the msvcr80.dll that might be missing in some Windows installations. 

The msvcr80.dll is available as a part of the "Microsoft Visual C++ 2005 SP1 Redistributable Package":
http://www.microsoft.com/downloads/details.aspx?FamilyID=200B2FD9-AE1A-4A14-984D-389C36F85647&displaylang=en
 
In order to replace dependency on msvcr80.dll with the dependency on msvcrt.dll the DLL currently
included in this fragment was recompiled with Visual Studio 6.0 using wincrypt.h and crypt32.lib 
from the Visual Studio 2005.