ke.co.tawi.babblesms.server.utils.security.SecurityUtil.java Source code

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Here is the source code for ke.co.tawi.babblesms.server.utils.security.SecurityUtil.java

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/**
 * Copyright 2015 Tawi Commercial Services Ltd
 * 
 * Licensed under the Open Software License, Version 3.0 (the License?); you may
 * not use this file except in compliance with the License. You may obtain a copy
 * of the License at:
 * http://opensource.org/licenses/OSL-3.0
 * 
 * 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 ke.co.tawi.babblesms.server.utils.security;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import org.apache.commons.lang3.exception.ExceptionUtils;
import org.apache.log4j.Logger;

/**
 * Utility with security related functions.
 * <p>
 *  
 * @author <a href="mailto:michael@tawi.mobi">Michael Wakahe</a>
 */
public class SecurityUtil {

    private static Logger logger = Logger.getLogger(SecurityUtil.class);

    /**
     * Return the MD5 hahs of a String. It will work correctly for most 
     * strings. A word which does not work correctly is "michael" (check 
     * against online MD5 hash tools).   
     *
     * @param toHash plain text string to encryption
     * @return an md5 hashed string
     */
    public static String getMD5Hash(String toHash) {
        String md5Hash = "";

        try {
            MessageDigest md = MessageDigest.getInstance("MD5");

            md.update(toHash.getBytes(), 0, toHash.length());

            md5Hash = new BigInteger(1, md.digest()).toString(16);

        } catch (NoSuchAlgorithmException e) {
            logger.error("NoSuchAlgorithmException while getting MD5 hash of '" + toHash + "'");
            logger.error(ExceptionUtils.getStackTrace(e));
        }

        return md5Hash;
    }

}