RSA签名和验证数据

         private const string PubKey = "BgIAAACkAABSU0ExAAQAAAEAAQAxg/L6l3AyA+Zd7Hm7ESCcS4CcgY8PvwE2arRvTbfI4+z6zPJaDkOyho9X6owIwceN9zXH5XNsAmEVYBkgmwdX5r5g8iymKywYSaVpt1FDUHRkGY39NuDVsbVJ/1DW15TTVeYLalbtOOb0h61pnaW9FgQNaYMMZSWPO8UZ9hPepw==";

         private const string PriKey = "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";
         static void Main(string[] args)
         {
             var aa = "";
             var e = SignData(aa,PriKey);
             var dd = VerifySerialNum(aa, e, PubKey);
         }

         /// <summary>
         /// RSA签名数据
         /// </summary>
         /// <param name="input">要签名的数据</param>
         /// <param name="priKey">base64编码的私钥</param>
         /// <returns>签名后数据的base64字符串</returns>
         public static string SignData(string input,string priKey)
         {
             try
             {
                 using (var rsa = new RSACryptoServiceProvider())
                 {
                     rsa.ImportCspBlob(Convert.FromBase64String(priKey));
                     var data = Encoding.UTF8.GetBytes(input);
                     return Convert.ToBase64String(rsa.SignData(data, new SHA1CryptoServiceProvider()));
                 }
             }
             catch (Exception)
             {
                 return string.Empty;
             }
         }

         ///  <summary>
         /// 验证数据
         ///  </summary>
         ///  <param name="input">签名前数据</param>
         ///  <param name="serialNum">SHA1签名后数据base64编码字符串</param>
         ///  <param name="pubKey">base64编码的公钥</param>
         ///  <returns></returns>
         public static bool VerifySerialNum(string input, string serialNum, string pubKey)
         {
             try
             {
                 //导入公钥
                 using (var rsa = new RSACryptoServiceProvider())
                 {
                     rsa.ImportCspBlob(Convert.FromBase64String(pubKey));
                     return rsa.VerifyData(Encoding.UTF8.GetBytes(input), new SHA1CryptoServiceProvider(),
                         Convert.FromBase64String(serialNum));
                 }
             }
             catch (Exception)
             {
                 return false;
             }
         }