/*******************************************************************************
 * Copyright © 2017-2020 Znyc.Cloudcar.Admin.Framework 版权所有
 * Author: Znyc
 * Description: Znyc快速开发平台
 * Website：http://www.Znyc.Cloudcar.Admin.com
*********************************************************************************/

using System;
using System.Security.Cryptography;
using System.Text;

namespace Znyc.Cloudcar.Admin.Commons
{
    /// <summary>
    ///     用于webapi 生成票据使用，公开
    /// </summary>
    public sealed class Cryptography
    {
        /// <summary>
        /// </summary>
        /// <param name="tmpStr"></param>
        /// <param name="encodingAESKey"></param>
        /// <returns></returns>
        public static string AES_encrypt(string tmpStr, string encodingAESKey)
        {
            string str = tmpStr + GetMD5_32(encodingAESKey);
            return GetMD5_32(SHA256(str)) + GetMD5_32(tmpStr);
        }

        /// <summary>
        ///     SHA256函数
        /// </summary>
        /// <param name="str">原始字符串</param>
        /// <returns>SHA256结果(返回长度为44字节的字符串)</returns>
        public static string SHA256(string str)
        {
            byte[] SHA256Data = Encoding.UTF8.GetBytes(str);
            SHA256Managed Sha256 = new SHA256Managed();
            byte[] Result = Sha256.ComputeHash(SHA256Data);
            return Convert.ToBase64String(Result); //返回长度为44字节的字符串
        }

        /// <summary>
        ///     获得32位的MD5加密
        /// </summary>
        public static string GetMD5_32(string input)
        {
            MD5 md5 = MD5.Create();
            byte[] data = md5.ComputeHash(Encoding.Default.GetBytes(input));
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < data.Length; i++)
            {
                sb.Append(data[i].ToString("x2"));
            }

            return sb.ToString();
        }
    }
}