架构训练营第十一周作业

import sun.security.provider.MD5;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
 * @author ray.zhangr
 * @date 2020/8/26 1:47 下午
 */
public class TestPasswd {
    /**
     * 模拟用户提交登陆密码校验
     * 明文密码在网络中传输使用https
     * 如果使用http需要自己实现加密传输
     * @param userId
     * @param password
     * @param passwdEncrypt
     * @return
     */
    private static Boolean checkPW(String userId, String password, String passwdEncrypt) {
        String salt = userId;
        String passwdVerify = Md5Util.md5(userId + password);
        return passwdVerify.equals(passwdEncrypt);
    }
    public static void main(String args[]) {
        // String passwdEncrypt = Md5Util.md5("64359" + "HappyGeekTime");
        System.out.println(checkPW("64359", "HappyGeekTime", "70970617f196ec4102cc396db5b06bcf"));
    }
}
/**
 * MD5工具类
 * 转自https://www.cnblogs.com/huxiaoguang/articles/10809750.html
 */
class Md5Util {
    public static String md5(String buffer)
    {
        String string       = null;
        char hexDigist[] = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
        MessageDigest md;
        try {
            md = MessageDigest.getInstance("MD5");
            md.update(buffer.getBytes());
            byte[] datas = md.digest(); //16个字节的长整数
            char[] str = new char[2*16];
            int k = 0;
            for(int i=0;i<16;i++)
            {
                byte b   = datas[i];
                str[k++] = hexDigist[b>>>4 & 0xf];//高4位
                str[k++] = hexDigist[b & 0xf];//低4位
            }
            string = new String(str);
        } catch (NoSuchAlgorithmException e)
        {
            e.printStackTrace();
        }
        return string;
    }
}