edu.harvard.i2b2.eclipse.plugins.adminTool.utils.SecurityUtil.java Source code

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Here is the source code for edu.harvard.i2b2.eclipse.plugins.adminTool.utils.SecurityUtil.java

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/*
 * Copyright (c) 2006-2010 Massachusetts General Hospital 
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the i2b2 Software License v2.1 
 * which accompanies this distribution. 
 * 
 * Contributors: 
 *      
 *     
 */
package edu.harvard.i2b2.eclipse.plugins.adminTool.utils;

import java.util.Hashtable;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import edu.harvard.i2b2.common.exception.I2B2Exception; //import edu.harvard.i2b2.navigator.LoginDHelper;
import edu.harvard.i2b2.patientMapping.security.HighEncryption;

public class SecurityUtil {

    private HighEncryption notesHighEnc = null;
    private static final Log log = LogFactory.getLog(SecurityUtil.class);

    /**
     * Default note key.
     */
    private String notesKey = " ";

    /**
     * Constructor to accept only notes key. Default key is used for empi and
     * encounter encryption.
     * 
     * @param notesKey
     */
    public SecurityUtil(String notesKey) {
        this.notesKey = notesKey;
        initHighEncrypt();
    }

    /**
     * Initialize HighEncryption variable for empi and notes.
     */
    private void initHighEncrypt() {
        try {

            // init high encryption with notes key
            Hashtable<String, String> hashNotestemp = new Hashtable<String, String>();
            hashNotestemp.put("A:\\I401.txt", notesKey);
            notesHighEnc = new HighEncryption("A:\\I401.txt", hashNotestemp);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Decrypt notes with notes key.
     * 
     * @param encrypted
     *            notes
     * @return
     */
    public String decryptNotes(String encryptedNotes) {

        String tmp = null;

        try {
            tmp = notesHighEnc.generic_decrypt(encryptedNotes);
        } catch (I2B2Exception e) {
            if (e.getMessage().equalsIgnoreCase("Invalid key")) {
                log.error("Invalid key");
                return "[I2B2-Error] Invalid key";
            }
        }

        return tmp;
    }

    /**
     * Decrypt notes with notes key.
     * 
     * @param encrypted
     *            notes
     * @return
     */
    public String encryptNotes(String encryptedNotes) {

        String tmp = null;

        try {
            tmp = notesHighEnc.generic_encrypt(encryptedNotes);
        } catch (I2B2Exception e) {
            if (e.getMessage().equalsIgnoreCase("Invalid key")) {
                log.error("Invalid key");
                return "[I2B2-Error] Invalid key";
            }
        }

        return tmp;
    }

}