support.AuthManager.java Source code

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Here is the source code for support.AuthManager.java

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package support;

import dao.UserDao;
import entities.User;
import java.math.BigInteger;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;

/**
 *
 * @author Rice Pavel
 */
@Component
@Transactional
public class AuthManager {

    @Autowired
    private UserDao userDao;

    public User getCurrentUser() {
        return userDao.getUserByLogin(getUserName());
    }

    public static String getUserName() {
        String username;
        Object principal = SecurityContextHolder.getContext().getAuthentication().getPrincipal();

        if (principal instanceof UserDetails) {
            username = ((UserDetails) principal).getUsername();
        } else {
            username = principal.toString();
        }
        return username;
    }

    public static String md5Custom(String st) {
        MessageDigest messageDigest = null;
        byte[] digest = new byte[0];

        try {
            messageDigest = MessageDigest.getInstance("MD5");
            messageDigest.reset();
            messageDigest.update(st.getBytes(StandardCharsets.UTF_8));
            digest = messageDigest.digest();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        BigInteger bigInt = new BigInteger(1, digest);
        String md5Hex = bigInt.toString(16);

        while (md5Hex.length() < 32) {
            md5Hex = "0" + md5Hex;
        }

        return md5Hex;
    }

}