1         /// 
 2         /// 数字签名并返回BASE64编码的字符串 3         /// 
 4         /// 待签名内容 5         /// 私钥文件路径 6         /// 
      7         internal static string Sign(string contentForSign, string privateKeyFile) 8         { 9             var rsa = CcbRsaCryptProvider.GetInstanceForSign(privateKeyFile);10             var signData = rsa.SignData(Encoding.UTF8.GetBytes(contentForSign), new MD5CryptoServiceProvider());11             return Convert.ToBase64String(signData);12         }13 14         /// 
15         /// 验证签名16         /// 
17         /// 待签名内容18         /// 签名内容19         /// 公钥文件路径20         /// 
     
      验证结果
     21         internal static bool VerifySign(string contentForSign, string signedData, string publicKeyFile)22         {23             var rsaPub = CcbRsaCryptProvider.GetInstanceForVerifySign(publicKeyFile);24             return rsaPub.VerifyData(Encoding.UTF8.GetBytes(contentForSign), new MD5CryptoServiceProvider(), Convert.FromBase64String(signedData));25         }