package com.whyc.util;

import com.whyc.constant.SuperConstant;
import org.apache.shiro.codec.Base64;
import org.apache.shiro.codec.Hex;
import org.apache.shiro.crypto.SecureRandomNumberGenerator;
import org.apache.shiro.crypto.hash.SimpleHash;

import java.util.HashMap;
import java.util.Map;

/**
 * @Description：摘要
 */
public class DigestsUtil {

    /**
     * @Description sha1方法
     * @param input 需要散列字符串
     * @param salt 盐字符串
     * @return
     */
    public static String sha1(String input, String salt) {
       return new SimpleHash(SuperConstant.HASH_ALGORITHM, input, salt,SuperConstant.HASH_INTERATIONS).toString();
    }

    /**
     * @Description 随机获得salt字符串
     * @return
     */
    public static String generateSalt(){
        SecureRandomNumberGenerator randomNumberGenerator = new SecureRandomNumberGenerator();
        String dymSalt = Base64.encodeToString((randomNumberGenerator.nextBytes().toHex() + SuperConstant.SALT).getBytes());
        return dymSalt;
    }


    /**
     * @Description 生成密码字符密文 和 动态salt密文
     * @param
     * @return
     */
    public static Map<String,String> encryptPassword(String passwordPlain) {
       Map<String,String> map = new HashMap<>();
       String salt = generateSalt();
       String password =sha1(passwordPlain,salt);
       map.put("salt", salt);
       map.put("password", password);
       return map;
    }

}