DES (Data Encryption Standard)

Frasti

Hello everybody!

I have to apply the DES (Data Encryption Standard) algorithm (exactly the Triple-DES algorithm) on some data. Now i'm looking for a piece of navision-code or an executable that i can run by the shell-command to encrypt/decrypt my data with the DES.

Is someone experienced with this problem or can sombody help me?

nunomaia

Compile this class in visual studio and you will have a console application that encrypts in 3DES

namespace ConsoleApplication
{
	class EncryptData
	{
		private static string EncryptText(string data, byte[] tdesKey, byte[] tdesIV)
		{    
            TripleDESCryptoServiceProvider cryto = new TripleDESCryptoServiceProvider();
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, cryto.CreateEncryptor(tdesKey, tdesIV), CryptoStreamMode.Write);
            StreamWriter sw = new StreamWriter(cs);
            sw.Write(data);
            sw.Flush();
            cs.FlushFinalBlock();
            ms.Flush();
            return Convert.ToBase64String(ms.GetBuffer(), 0, (int) ms.Length);
		}
		
		private static string DecryptText(string data, byte[] tdesKey, byte[] tdesIV)
		{    
			TripleDESCryptoServiceProvider cryto = new TripleDESCryptoServiceProvider();
			byte[] buffer = Convert.FromBase64String(data);
            MemoryStream ms = new MemoryStream(buffer);
            CryptoStream cs = new CryptoStream(ms, cryto.CreateDecryptor(tdesKey, tdesIV), CryptoStreamMode.Read);
            StreamReader sr = new StreamReader(cs);
            return sr.ReadToEnd();
		}
		
		[STAThread]
		static void Main(string[] args)
		{
			byte[] KEY_192 = {42, 16, 93, 156, 78, 4, 218, 32, 15, 167, 44, 80, 26, 250, 155, 112, 2, 94, 11, 204, 119, 35, 184, 197};
			byte[] IV_192 = {55, 103, 246, 79, 36, 99, 167, 3, 42, 5, 62, 83, 184, 7, 209, 13, 145, 23, 200, 58, 173, 10, 121, 222};
			string data = "hello world";
			Console.WriteLine("Clean:" + data);
			string encrypted = EncryptText(data, KEY_192, IV_192);
			Console.WriteLine("Encrypted:" + encrypted);
			Console.WriteLine("Decrypted:" + DecryptText(encrypted, KEY_192, IV_192));
		}
	}
}

Frasti

great thx! i made some changes: i used a BinaryWriter to write my data as bytes and it works...