/// <summary>
/// Use this constructor to manually set the functions on the encryption
/// enc.CustomOp = rbjd.Forward;
/// enc.ReverseOp = rbjd.Reverse;
/// </summary>
/// <example>
/// var rbjd = new RandomBijectionDecorator(enc.Alphabet)
/// enc.InitializeBijection(rng);
/// enc.CustomOp = rbjd.Forward;
/// enc.ReverseOp = rbjd.Reverse;
/// </example>
/// <param name="alph"></param>
public RandomBijection(char[] alph)
{
_Encrypt = new NullCypher();
_Encrypt.Alphabet = alph;
Alphabet = alph;
ModulateKey = true;
}
public static char[] GetPowerOf2Alphabet()
{
var alpha = AlphabeticCypher.GetSimpleAlphabet(false);
var powOf2Alphabet = new List <char>(alpha);
powOf2Alphabet.AddRange(new char[] { 'A', 'H', 'B', 'W', 'N' });
return(powOf2Alphabet.ToArray());
}
/// <summary>
/// Use this constructor as an Decorator to the encryption that allows a custom operation.
/// This will generate a random bijection so the attacker wont know whether xor or + is being used.
/// </summary>
/// <param name="enc"></param>
public RandomBijection(AlphabeticCypher enc)
{
_Encrypt = enc;
Alphabet = enc.Alphabet;
ModulateKey = true;
}