DES with C # Security Key

Question

I know. This is probably a general question, but I cannot find the answer anywhere. Therefore, I have a byte array and a byte array value, and I need to create a new 8-byte array that was DES encrypted in C #

Answer 1

This is what I was looking for: D: D ... thanks: D

private static byte[] Encrypt(byte[] value, byte[] key) { DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider { Mode = CipherMode.ECB, Padding = PaddingMode.None }; MemoryStream memoryStream = new MemoryStream(); CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoProvider.CreateEncryptor(key, key), CryptoStreamMode.Write); cryptoStream.Write(value, 0, value.Length); cryptoStream.Close(); return memoryStream.ToArray(); } 

Answer 2

Here is a sample code. Do not forget to put zero trace zeros with random data, remember the written bytes and DES parameters: Key, IV.

Best wishes;)

 using System.Security.Cryptography; using System.IO; namespace hash { public static class Program { static void Main(string[] args) { byte[] data = new byte[10000]; DES des = DES.Create(); int bytesWritten = 0; data = Encode(data, des, out bytesWritten); } private static byte[] Encode(byte[] data, DES des, out int bytesWritten) { using (var input = new MemoryStream(data)) using (var output = new MemoryStream()) using (var csp = new DESCryptoServiceProvider()) using (var encStream = new CryptoStream(output, csp.CreateEncryptor(des.Key, des.IV), CryptoStreamMode.Write)) { int length = 0; byte[] buffer = new byte[256]; bytesWritten = 0; while ((length = input.Read(buffer, 0, 256)) > 0) { if (length < 256) { byte[] pad = new byte[256]; using (var rng = RNGCryptoServiceProvider.Create()) { rng.GetBytes(pad); for (int i = 0; i < 256 - length; i++) { buffer[length + i] = pad[i]; } } encStream.Write(buffer, 0, length); bytesWritten += length; break; } encStream.Write(buffer, 0, 256); bytesWritten += length; } return output.ToArray(); } } } }