/// <summary>
/// Encrypts the given byte array using Rijndael / AES.
/// The array is aligned on 16 bytes.
/// </summary>
/// <param name="aBytes">The array of bytes to be encrypted</param>
/// <returns>Byte array that holds the encryped version of the aBytes parameter</returns>
public byte[] Encrypt(byte[] aBytes)
{
Logger.LogTrace("Enter");
// Reset the lenght of the string to exact blocks of 16 bytes
var length = aBytes.Length;
var add = 0;
if (length % 16 != 0)
{
add = 16 - (length % 16);
}
var bytes = new byte[add + length];
Buffer.BlockCopy(aBytes, 0, bytes, 0, length);
for (var i = 0; i < add; i++)
{
bytes[length + i] = 32;
}
Logger.LogDebug("Number of bytes added: " + add);
_encrypted = QboxNextRijndael.Encrypt(bytes, Key, Iv, 256);
Logger.LogTrace("Return");
return(_encrypted);
}
public string Decrypt(byte[] encryptedBytes)
{
_decrypted = QboxNextRijndael.Decrypt(encryptedBytes, Key, Iv, 256);
if (_decrypted == null)
{
return(null);
}
return(Encoding.UTF8.GetString(_decrypted).Trim());
}
/// <summary>
/// Encrypts the given string using RijnDael / AES.
/// The text is padded to a length of multiple of 16 bytes.
/// </summary>
/// <param name="aText">The string the must be encrypted</param>
/// <returns>an array of bytes holding the encrypted version of the string aText</returns>
public byte[] Encrypt(string aText)
{
// Reset the lenght of the string to exact blocks of 16 bytes
int length = aText.Length;
int add = 0;
if (length % 16 != 0)
{
add = 16 - (length % 16);
}
Logger.LogDebug("Number of bytes to add: " + add);
string text = aText.PadRight(add + length, ' ');
_decrypted = Encoding.UTF8.GetBytes(text);
_encrypted = QboxNextRijndael.Encrypt(_decrypted, Key, Iv, 256);
return(_encrypted);
}
public QboxRijndael()
{
Key = QboxNextRijndael.StringToHex("00010203050607080A0B0C0D0F10111214151617191A1B1C1E1F202123242526");
Iv = QboxNextRijndael.StringToHex("00000000000000000000000000000000");
}
public byte[] DecryptBytes(byte[] encryptedBytes)
{
return(QboxNextRijndael.Decrypt(encryptedBytes, Key, Iv, 256));
}
