使用MD5WithRSA来签名和验签（.NET）详解编程语言

 1         /// <summary> 
 2         /// 数字签名并返回BASE64编码的字符串 
 3         /// </summary> 
 4         /// <param name="contentForSign">待签名内容</param> 
 5         /// <param name="privateKeyFile">私钥文件路径</param> 
 6         /// <returns></returns> 
 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         /// <summary> 
15         /// 验证签名 
16         /// </summary> 
17         /// <param name="contentForSign">待签名内容</param> 
18         /// <param name="signedData">签名内容</param> 
19         /// <param name="publicKeyFile">公钥文件路径</param> 
20         /// <returns>验证结果</returns> 
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         }