Mega Code Archive
Crypto Utilities
<![CDATA[
using System;
using System.Collections.Generic;
using System.Text;
using System.Security;
using System.Security.Cryptography;
using System.Runtime.InteropServices;
using System.IO;
using System.Text;
namespace UltraRDC
{
public class CryptoUtilities
{
private CryptoUtilities()
{
}
public static byte[] Decrypt(SecureString key, byte[] data)
{
Rijndael encryption = Rijndael.Create();
encryption.KeySize = 256;
IntPtr marshalledKeyBytes = Marshal.SecureStringToGlobalAllocAnsi(key);
byte[] keyBytes = new byte[encryption.KeySize / 8];
byte[] decryptedData = new byte[data.Length];
Marshal.Copy(marshalledKeyBytes, keyBytes, 0, Math.Min(keyBytes.Length, key.Length));
encryption.Key = keyBytes;
encryption.IV = Convert.FromBase64String("QGWyKbe+W9H0mL2igm73jw==");
MemoryStream memoryStream = new MemoryStream(data, 0, data.Length);
CryptoStream cryptoStream = new CryptoStream(memoryStream, encryption.CreateDecryptor(), CryptoStreamMode.Read);
cryptoStream.Read(decryptedData, 0, decryptedData.Length);
cryptoStream.Close();
memoryStream.Close();
for (int i = 0; i < keyBytes.Length; i++)
keyBytes[i] = 0;
Marshal.ZeroFreeGlobalAllocAnsi(marshalledKeyBytes);
return decryptedData;
}
public static byte[] Encrypt(SecureString key, byte[] data)
{
Rijndael encryption = Rijndael.Create();
encryption.KeySize = 256;
IntPtr marshalledKeyBytes = Marshal.SecureStringToGlobalAllocAnsi(key);
byte[] keyBytes = new byte[encryption.KeySize / 8];
Marshal.Copy(marshalledKeyBytes, keyBytes, 0, Math.Min(keyBytes.Length, key.Length));
encryption.Key = keyBytes;
encryption.IV = Convert.FromBase64String("QGWyKbe+W9H0mL2igm73jw==");
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, encryption.CreateEncryptor(), CryptoStreamMode.Write);
cryptoStream.Write(data, 0, data.Length);
cryptoStream.Close();
memoryStream.Close();
for (int i = 0; i < keyBytes.Length; i++)
keyBytes[i] = 0;
Marshal.ZeroFreeGlobalAllocAnsi(marshalledKeyBytes);
return memoryStream.ToArray();
}
public static byte[] Encrypt(SecureString key, string data)
{
return Encrypt(key, Encoding.ASCII.GetBytes(data));
}
public static byte[] Encrypt(SecureString key, SecureString data)
{
IntPtr marshalledDataBytes = Marshal.SecureStringToGlobalAllocAnsi(data);
byte[] dataBytes = new byte[data.Length];
Marshal.Copy(marshalledDataBytes, dataBytes, 0, dataBytes.Length);
byte[] encryptedData = Encrypt(key, dataBytes);
for (int i = 0; i < dataBytes.Length; i++)
dataBytes[i] = 0;
Marshal.ZeroFreeGlobalAllocAnsi(marshalledDataBytes);
return encryptedData;
}
}
}
]]>