C#根据秘钥用SHA256+RSA的方式进行加密

C#根据秘钥用SHA256+RSA的方式进行加密

        /// <summary>
        /// 加签
        /// </summary>
        /// <param name="contentForSign"></param>
        /// <param name="privateKey"></param>
        /// <returns></returns>
        public static string Sign(string contentForSign, string privateKey)
        {
            //转换成适用于.Net的秘钥
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            rsa.FromPrivateKeyJavaString(privateKey);//加载私钥
            //创建一个空对象
            var rsaClear = new RSACryptoServiceProvider();
            var paras = rsa.ExportParameters(true);
            rsaClear.ImportParameters(paras);
            //签名返回
            using (var sha256 = new SHA256CryptoServiceProvider())
            {
                var signData = rsa.SignData(Encoding.UTF8.GetBytes(contentForSign), sha256);
                return BytesToHex(signData);
            }
        }


        public static string BytesToHex(byte[] data)
        {
            StringBuilder sbRet = new StringBuilder(data.Length * 2);
            for (int i = 0; i < data.Length; i++)
            {
                sbRet.Append(Convert.ToString(data[i], 16).PadLeft(2, '0'));
            }
            return sbRet.ToString();
        }

参考文章链接https://www.cnblogs.com/caihuaxing/p/14439668.html