public static void TryDecryptString(byte[] contents, Func <byte[], bool> validate)
{
if (validate != null && validate(contents))
{
TrySetNopAsDefault();
return;
}
for (var i = 0; i < cryptos.Length; i++)
{
var copy = GetCopy(contents);
var crypto = cryptos[i];
crypto.Decrypt(copy);
if (validate == null || validate(copy))
{
// seems to have worked
copy.CopyTo(contents, 0);
if (validate != null && crypto != currentEncryption)
{
Console.WriteLine("Found crypto {0}", crypto);
currentEncryption = crypto;
PutCurrentInFront();
}
return;
}
}
Console.WriteLine("No crypto found for string!");
}
private static void TrySetNopAsDefault()
{
if (currentEncryption != null)
{
return;
}
currentEncryption = nopEncryption;
PutCurrentInFront();
}
private void TrySetNopAsDefault()
{
if (currentEncryption != null || cryptoLocked)
{
return;
}
currentEncryption = nopEncryption;
PutCurrentInFront();
}
public void TryDecryptString(byte[] contents, Func <byte[], bool> validate, bool ascii)
{
if (cryptoLocked)
{
currentEncryption.Decrypt(contents);
return;
}
// Get score of data for each crypto
var results = new DecryptedString[cryptos.Length];
for (var i = 0; i < cryptos.Length; i++)
{
var crypto = cryptos[i];
var copy = GetCopy(contents);
crypto.Decrypt(copy);
var score = getScoreForString(ascii ? Encoding.ASCII.GetString(copy) : Encoding.Unicode.GetString(copy), ascii);
if (crypto == currentEncryption)
{
score += 5;
}
results[i] = new DecryptedString
{
decrypted = copy,
score = score,
crypto = crypto,
};
}
var orderedResults = results.OrderByDescending(x => x.score);
// Take a wild guess, pick the first one
var best = orderedResults.First();
currentEncryption = best.crypto;
PutCurrentInFront();
best.decrypted.CopyTo(contents, 0);
}
public void SetEncryption(IWzEncryption crypto) => _encryption.ForceCrypto(crypto, true);
public void ForceCrypto(IWzEncryption encryption, bool lockCrypto)
{
currentEncryption = encryption;
cryptoLocked = lockCrypto;
PutCurrentInFront();
}
