public DecipherText(CipherText cipherText, string key, ICryptography decryptor)
{
CipherText = cipherText;
DecipheredText = decryptor.Decrypt(cipherText, key);
Key = key;
Score = new FrequencyAnalysis(DecipheredText).Score;
}
public DecipherText Crack(CipherText cipherText, int keyLength = 0)
{
if (keyLength == 0)
{
keyLength = FindKeyLength(cipherText.Bytes);
}
string key = GetKey(cipherText.Bytes, keyLength);
return(new DecipherText(cipherText, key, new VigenerCipher()));
}
public string Decrypt(CipherText cipherText, string key)
{
byte[] expandedKey = ExpandKey(key.ToByteArray(), cipherText.Length);
return(expandedKey.XorWith(cipherText.Bytes).ToASCIIString());
}