/// <summary>
        /// 验签
        /// </summary>
        /// <param name="data">签名前的数据</param>
        /// <param name="publickey">公钥</param>
        /// <param name="sign">签名</param>
        /// <param name="encoding"></param>
        /// <returns></returns>
        public static bool rsaCheck(string data, string publickey, string sign, string encoding = "UTF-8")
        {
            byte[]  bt  = Encoding.GetEncoding(encoding).GetBytes(data);
            byte[]  bt2 = Convert.FromBase64String(sign);
            RSA_PEM pem = RSA_PEM.FromPEM(publickey);

            using (RSACryptoServiceProvider provider = pem.GetRSA())
            {
                return(provider.VerifyData(bt, CryptoConfig.MapNameToOID("SHA256"), bt2));
            }
        }
        ///// <summary>
        /////
        ///// </summary>
        ///// <param name="dataStr">配置json</param>
        ///// <param name="keyFile">证书路径</param>
        ///// <param name="password">证书密码</param>
        ///// <returns></returns>
        //public static string Sha256Sign(string dataStr, string keyFile, string password)
        //{
        //    using (RSACryptoServiceProvider sha256 = new RSACryptoServiceProvider())
        //    {
        //        var privateKey = GetPrivateKey(keyFile, password);  //获取私钥
        //        byte[] dataInBytes = Encoding.Default.GetBytes(dataStr);
        //        sha256.FromXmlString(privateKey);
        //        byte[] inArray = sha256.SignData(dataInBytes, CryptoConfig.MapNameToOID("SHA256"));
        //        string sign = Convert.ToBase64String(inArray);
        //        return sign;
        //    }
        //}



        /// <summary>
        /// 签名
        /// </summary>
        /// <param name="str">需签名的数据</param>
        /// <param name="privateKey">私钥</param>
        /// <param name="encoding">编码格式 默认utf-8</param>
        /// <returns></returns>
        public static string Signature(string str, string privateKey, string encoding = "UTF-8")
        {
            byte[]  bt  = Encoding.GetEncoding(encoding).GetBytes(str);
            RSA_PEM pem = RSA_PEM.FromPEM(privateKey);

            using (RSACryptoServiceProvider provider = pem.GetRSA())
            {
                byte[] inArray = provider.SignData(bt, CryptoConfig.MapNameToOID("SHA256"));
                string sign    = Convert.ToBase64String(inArray);
                return(sign);
            }
        }