Returns encrypted password for a given clear text password using SHA-256 - Java Security

Java examples for Security:Password

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Description

Returns encrypted password for a given clear text password using SHA-256

Demo Code

/*/* w w  w.j a v a2 s .  com*/
 * ============================================================================
 * GNU Lesser General Public License
 * ============================================================================
 *
 * Copyright (C) 2009 - 2015 Jonathan Luo
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
 *
 */
//package com.java2s;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    /**
     * Returns encrypted password for a given clear text password
     * 
     * @param password clear text password.
     * @return encrypted password.
     */
    public static String encryptPassword(String password) {
        return sha2(password);
    }

    /**
     * http://stackoverflow.com/questions/6840206/sha2-password-hashing-in-java
     *
     * SHA-2 ? 64 digit hexadecimal number
     *
     * @param password
     * @return
     */
    public static String sha2(String password) {
        try {
            MessageDigest mDigest = MessageDigest.getInstance("SHA-256");
            String salt = "random_salt_77"; // get from property file
            String passWithSalt = password + salt;
            byte[] passBytes = passWithSalt.getBytes();
            byte[] result = mDigest.digest(passBytes);
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < result.length; i++) {
                sb.append(Integer.toString((result[i] & 0xff) + 0x100, 16)
                        .substring(1));
            }
            return sb.toString();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return null;
    }
}

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