using System;
using System.Collections.Generic;
using System.Text;

namespace Shared.Encryption
{
    public class BASE64
    {
        /// <summary>
        /// 将字符串使用base64算法加密
        /// </summary>
        /// <param name="code">待加密的字符串</param>
        /// <returns>加密后的字符串</returns>
        public static string EncodeBase64(string code)
        {
            string encode = "";
            var bytes = Encoding.UTF8.GetBytes(code);  //将一组字符编码为一个字节序列.
            try
            {
                encode = Convert.ToBase64String(bytes);  //将8位无符号整数数组的子集转换为其等效的,以64为基的数字编码的字符串形式.
            }
            catch
            {
                encode = code;
            }
            return encode;
        }

        /// <summary>
        /// 将字符串使用base64算法解密
        /// </summary>
        /// <param name="code">已用base64算法加密的字符串</param>
        /// <returns>解密后的字符串</returns>
        public static string DecodeBase64(string code)
        {
            string decode = "";           
            try
            {
                var bytes = Convert.FromBase64String(code);  //将2进制编码转换为8位无符号整数数组.
                decode = Encoding.UTF8.GetString(bytes);  //将指定字节数组中的一个字节序列解码为一个字符串。
            }
            catch
            {
                decode = code;
            }
            return decode;
        }
    }


}