架构师训练营 - 第十一周命题作业

package password;
import java.security.MessageDigest;
import java.util.Objects;
/**
 * @description:
 * @author: liu.w
 * @create: 2020-08-25 11:21
 **/
public class CheckPwd {
    public static final String salt = "deal";
    public static void main(String[] args) {
        System.out.println(checkPW(1, "abcd", "b2674a9182edd9054bfb7029628e11fa"));
    }
    /**
     * @param userId
     * @param password 原始密码
     * @param secrets 加密的密码摘要
     * @return
     */
    public static boolean checkPW(Integer userId, String password, String secrets) {
        String pwd = userId + password + salt;
        return Objects.equals(secrets, encrypt(pwd));
    }
    public static String encrypt(String dataStr) {
        try {
            MessageDigest m = MessageDigest.getInstance("MD5");
            m.update(dataStr.getBytes("UTF8"));
            byte[] str = m.digest();
            String result = "";
            for (int i = 0; i < str.length; i++) {
                result += Integer.toHexString((0x000000FF & str[i]) | 0xFFFFFF00).substring(6);
            }
            return result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }
}