rijndael 加密解密小例子(二)

 

//解密，返回解密后的 DateSet,传入的参数是需解密的文件名  
        public DataSet EnCrypt(string InName)  
        {  
            FileStream fsIn = new FileStream(InName,FileMode.Open,FileAccess.Read);  
              
            byte[] Key = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16};  
            byte[] IV = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16};  
 
            RijndaelManaged RMCrypto = new RijndaelManaged();  
 
            System.Security.Cryptography.CryptoStream cs = new CryptoStream(fsIn,RMCrypto.CreateDecryptor(Key,IV),CryptoStreamMode.Read);  
            DataSet myDataSet = new DataSet ();  
            System.Xml.XmlTextReader XmlReader ;      
            try 
            {     
                XmlReader = new System.Xml.XmlTextReader (cs);                    
                myDataSet.ReadXml(XmlReader);                     
                XmlReader.Close ();  
                fsIn.Close();  
            }  
            catch(System.Exception e)    
            {  
            }             
            return myDataSet;  
        }  
 
        //加密，InName表示要加密的文件，OutName为加密后的文件名  
        public void Crypt(string InName,string OutName)  
        {  
            FileStream fsIn = new FileStream(InName,FileMode.Open,FileAccess.Read);  
 
            FileStream fsOut = new FileStream(OutName,FileMode.Create,FileAccess.Write);  
 
            byte[] Key = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16};  
            byte[] IV = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16};  
 
            RijndaelManaged RMCrypto = new RijndaelManaged();  
 
            System.Security.Cryptography.CryptoStream cs = new CryptoStream(fsOut,RMCrypto.CreateEncryptor(Key,IV),CryptoStreamMode.Write);  
 
            byte[] bin = new byte[100]; //This is intermediate storage for the encryption.  
            long rdlen = 0;              //This is the total number of bytes written.  
            long totlen = fsIn.Length;    //This is the total length of the input file.  
            int len;                     //This is the number of bytes to be written at a time.  
              
            while(rdlen < totlen)  
            {  
                len = fsIn.Read(bin, 0, 100);  
                cs.Write(bin, 0, len);  
                rdlen = rdlen + len;  
                Console.WriteLine("{0} bytes processed", rdlen);  
            }  
   
            cs.Close();    
            fsOut.Close();  
            fsIn.Close();                     
 
        }