Csharp/C Sharp by API/System.Security.Cryptography/TripleDESCryptoServiceProvider

TripleDESCryptoServiceProvider.CreateDecryptor

<source lang="csharp"> /* 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();
  }

}

 </source>

TripleDESCryptoServiceProvider.CreateEncryptor

<source lang="csharp">

/* 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();
  }

}

 </source>

TripleDESCryptoServiceProvider.IV

<source lang="csharp"> using System; using System.IO; using System.Security.Cryptography; class MainClass {

 public static void Main() 
 {
   TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
   FileStream fsKeyIn = File.OpenRead(@"c:\encrypted.key");
   
   BinaryReader br = new BinaryReader(fsKeyIn);
   tdes.Key = br.ReadBytes(24);
   tdes.IV = br.ReadBytes(8);
   FileStream fsIn = File.OpenRead(@"c:\encrypted.txt");
   CryptoStream cs = new CryptoStream(fsIn, tdes.CreateDecryptor(),CryptoStreamMode.Read);
   StreamReader sr = new StreamReader(cs);
   Console.WriteLine(sr.ReadToEnd());
   sr.Close();
 }

}

 </source>

TripleDESCryptoServiceProvider.Key

<source lang="csharp"> using System; using System.IO; using System.Security.Cryptography; class MainClass {

 public static void Main() 
 {
   TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
   FileStream fsKeyIn = File.OpenRead(@"c:\encrypted.key");
   
   BinaryReader br = new BinaryReader(fsKeyIn);
   tdes.Key = br.ReadBytes(24);
   tdes.IV = br.ReadBytes(8);
   FileStream fsIn = File.OpenRead(@"c:\encrypted.txt");
   CryptoStream cs = new CryptoStream(fsIn, tdes.CreateDecryptor(),CryptoStreamMode.Read);
   StreamReader sr = new StreamReader(cs);
   Console.WriteLine(sr.ReadToEnd());
   sr.Close();
 }

}

 </source>