package com.stylefeng.guns.modular.system.util;


import com.stylefeng.guns.core.util.ToolUtil;
import org.springframework.util.Base64Utils;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

/**
 * 定义AES加密解密工具类
 */
public class AESUtil {

    private static final String KEY_ALGORITHM = "AES";//加密方式

    private static final String DEFAULT_CIPHER_ALGORITHM = "AES/CBC/PKCS5Padding";//默认的加密算法

    private static final String KEY = "xqT86jictTPpHMem";//密码

    private static final String IV_PARAMETER = "xqT86jicxqT86jic";//偏移量

    private static final String CHARSET = "UTF-8";//编码




    /**
     * 加密操作
     * @param content  待加密内容
     * @return
     * @throws Exception
     */
    public static String encrypt(String content) {
        try {
            if(ToolUtil.isEmpty(content)){
                return content;
            }
            Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);
            byte[] raw = KEY.getBytes(CHARSET);
            SecretKeySpec skeySpec = new SecretKeySpec(raw, KEY_ALGORITHM);
            IvParameterSpec iv = new IvParameterSpec(IV_PARAMETER.getBytes());
            cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
            byte[] encrypted = cipher.doFinal(content.getBytes(CHARSET));
            return Base64Utils.encodeToString(encrypted);
        }catch (Exception e){
            e.printStackTrace();
        }
        return content;
    }

    /**
     *解密操作
     * @param content 待解密内容
     * @return
     * @throws Exception
     */
    public static String decrypt(String content) {
        try {
            if(ToolUtil.isEmpty(content)){
                return content;
            }
            byte[] raw = KEY.getBytes(CHARSET);
            SecretKeySpec skeySpec = new SecretKeySpec(raw, KEY_ALGORITHM);
            Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);
            IvParameterSpec iv = new IvParameterSpec(IV_PARAMETER.getBytes());
            cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);

            byte[] encrypted1 = Base64Utils.decodeFromString(content);
            byte[] original = cipher.doFinal(encrypted1);
            String originalString = new String(original, CHARSET);
            return originalString;
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return content;
    }


    public static void main(String[] ages){
//        String encrypt = AESUtil.encrypt("19167181339");
//        System.err.println(encrypt);
        String travel = AESUtil.decrypt("tw1pslwtyVl58hz4A9HauCmgWtML1DKJKGIOxVhv9KE=");
        System.err.println(travel);

//        String decrypt = DESUtil.decrypt("xqT86jictTPpHMem", "uFT7jx9P7+t8n1IVQsxn7A==");
//        System.err.println(decrypt);
    }
}