fr.esecure.banking.metier.utils.PasswordGenerator.java Source code

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Here is the source code for fr.esecure.banking.metier.utils.PasswordGenerator.java

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package fr.esecure.banking.metier.utils;

import org.springframework.stereotype.Service;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author mskane
 */
@Service
public class PasswordGenerator {

    public static final int NChar = 8;
    private static final String[] maj = { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O",
            "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" };
    private static final String[] min = { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o",
            "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z" };
    private static final int[] chiffre = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, };
    private static final String[] charSpecial = { "$", "", "@", "", "*", "%", "&", "#", "{", "(", "[", "-",
            ")", "]", "}", "+" };

    public PasswordGenerator() {
    }

    public static String genererDefaultPassword() {
        int n;
        String password = "";
        Random r = new Random();
        for (int i = 0; i < NChar; i++) {
            n = r.nextInt(4); // gnere un nombre alatoire entre 0 et 3
            if (n == 0)
                password += maj[r.nextInt(maj.length)];
            else if (n == 1)
                password += min[r.nextInt(min.length)];
            else if (n == 2)
                password += chiffre[r.nextInt(chiffre.length)];
            else
                password += charSpecial[r.nextInt(charSpecial.length)];
        }
        return password;
    }

    public static String genererDefaultPasswordAndCrypt() {
        int n;
        String password = "";
        Random r = new Random();
        for (int i = 0; i < NChar; i++) {
            n = r.nextInt(4); // gnere un nombre alatoire entre 0 et 3
            if (n == 0)
                password += maj[r.nextInt(maj.length)];
            else if (n == 1)
                password += min[r.nextInt(min.length)];
            else if (n == 2)
                password += chiffre[r.nextInt(chiffre.length)];
            else
                password += charSpecial[r.nextInt(charSpecial.length)];
        }
        return crypter(password);
    }

    public static String crypter(String password) {
        StringBuilder stringBuilder = null;

        try {
            MessageDigest messageDigest = MessageDigest.getInstance("SHA-256");
            byte[] hash = messageDigest.digest(password.getBytes("UTF-8"));
            stringBuilder = new StringBuilder();
            for (int i = 0; i < hash.length; i++) {
                stringBuilder.append(Integer.toString((hash[i] & 0xff) + 0x100, 16).substring(1));
            }
        } catch (UnsupportedEncodingException ex) {
            Logger.getLogger(PasswordGenerator.class.getName()).log(Level.SEVERE, null, ex);
        } catch (NoSuchAlgorithmException ex) {
            Logger.getLogger(PasswordGenerator.class.getName()).log(Level.SEVERE, null, ex);
        }
        return stringBuilder.toString();
    }

    //
    public static String splitEmailForLogin(String email) {

        String[] tokens = email.trim().split("@");

        return tokens[0];

    }

    //Recupere la partie du email en partant du caractere @
    public static String splitEmailFqn(String email) {

        String[] tokens = email.trim().split("@");

        return tokens[1];

    }

    //Recupere la partie du email en partant du caractere @
    public static String CryptLeftEmail(String email) {

        String[] tokens = email.trim().split("@");
        String emailcrypt = "";
        for (int i = 0; i < tokens[0].length(); i++)
            emailcrypt += "*";
        tokens[0] = emailcrypt;
        return emailcrypt + "@" + tokens[1];

    }

}