Mega Code Archive

 

Categories / C# / Network

 

CryptoStream demo

/* C# Network Programming  by Richard Blum Publisher: Sybex  ISBN: 0782141765 */ using System; using System.IO; using System.Security; using System.Security.Cryptography; using System.Text; public class CryptoTest {    public static void Main()    {       Console.Write("Enter phrase to encrypt: ");       string phrase = Console.ReadLine();       MemoryStream memstrm = new MemoryStream();       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};       TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();       CryptoStream csw = new CryptoStream(memstrm,                      tdes.CreateEncryptor(Key, IV), CryptoStreamMode.Write);       csw.Write(Encoding.ASCII.GetBytes(phrase), 0, phrase.Length);       csw.FlushFinalBlock();       byte[] cryptdata = memstrm.GetBuffer();       Console.WriteLine("Encrypted: {0}",               Encoding.ASCII.GetString(cryptdata, 0, (int)memstrm.Length));       memstrm.Position = 0;       byte[] data = new byte[1024];       CryptoStream csr = new CryptoStream(memstrm,                      tdes.CreateDecryptor(Key, IV), CryptoStreamMode.Read);       int recv = csr.Read(data, 0, data.Length);       string newphrase = Encoding.ASCII.GetString(data, 0, recv);       Console.WriteLine("Decrypted: {0}", newphrase);       csr.Close();       csw.Close();       memstrm.Close();    } }