dtu.ds.warnme.app.utils.SecurityUtils.java Source code

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Here is the source code for dtu.ds.warnme.app.utils.SecurityUtils.java

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/**
 * Project:   warnme-app
 * File:      SecurityUtils.java
 * License: 
 *            This file is licensed under GNU General Public License version 3
 *            http://www.gnu.org/licenses/gpl-3.0.txt
 *
 * Copyright: Bartosz Cichecki [ cichecki.bartosz@gmail.com ]
 * Date:      24-12-2012
 */

package dtu.ds.warnme.app.utils;

import java.io.UnsupportedEncodingException;
import java.util.UUID;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.RandomStringUtils;
import org.apache.commons.lang3.StringUtils;

import android.util.Log;

/**
 * @author Bartosz Cichecki
 * 
 */
public class SecurityUtils {

    private static final String TAG = "SecurityUtils";

    private static final String CHARSET_UTF8 = "UTF-8";

    public static String getRandomPassword() {
        return RandomStringUtils.random(8, true, true);
    }

    public static String getUUID() {
        return UUID.randomUUID().toString();
    }

    public static String hashMD5Base64(String stringToHash) {
        if (StringUtils.isEmpty(stringToHash)) {
            return StringUtils.EMPTY;
        }
        try {
            byte[] bytes = stringToHash.getBytes(CHARSET_UTF8);
            byte[] sha512bytes = DigestUtils.md5(bytes);
            byte[] base64bytes = Base64.encodeBase64(sha512bytes);
            return new String(base64bytes, CHARSET_UTF8);
        } catch (UnsupportedEncodingException e) {
            Log.e(TAG, "This system does not support required hashing algorithms.", e);
            throw new IllegalStateException("This system does not support required hashing algorithms.", e);
        }
    }

    public static String hashSHA512Base64(String stringToHash) {
        if (StringUtils.isEmpty(stringToHash)) {
            return StringUtils.EMPTY;
        }
        try {
            byte[] bytes = stringToHash.getBytes(CHARSET_UTF8);
            byte[] md5bytes = DigestUtils.sha512(bytes);
            byte[] base64bytes = Base64.encodeBase64(md5bytes);
            return new String(base64bytes, CHARSET_UTF8);
        } catch (UnsupportedEncodingException e) {
            Log.e(TAG, "This system does not support required hashing algorithms.", e);
            throw new IllegalStateException("This system does not support required hashing algorithms.", e);
        }
    }

    private SecurityUtils() {

    }

}