string AttackThread(DatabaseOpener cracker, IPasswordSource passwordSource)
{
string passwordGuess;
while (true)
{
if (_stopWorking)
{
return(null);
}
if (_passwordFound != null)
{
return(null);
}
passwordGuess = passwordSource.NextPassword();
if (passwordGuess == null)
{
return(null);
}
if (cracker.TryKey(passwordGuess))
{
break;
}
Thread.MemoryBarrier();
_guessCounter++;
_lastGuess = passwordGuess;
}
return(passwordGuess);
}
//--- Public Methods ---
public void StartAttack(string databasePath, int numThreads, IPasswordSource passwordSource)
{
if (numThreads <= 0)
{
throw new ArgumentOutOfRangeException("numThreads");
}
lock (_syncLock)
{
if (_started)
{
throw new InvalidOperationException();
}
_started = true;
}
if (!PerformSelfTest())
{
throw new Exception("Self test failed");
}
var fileStream = new FileStream(databasePath, FileMode.Open, FileAccess.Read);
DatabaseOpener databaseOpener = new DatabaseOpener(fileStream);
stopwatch.Start();
for (int i = 0; i < numThreads; i++)
{
EasyThread.BeginInvoke(new EasyThreadMethod(
() =>
{
Thread.MemoryBarrier();
_guessingThreadsRunning++;
Thread.MemoryBarrier();
string result = AttackThread(databaseOpener, passwordSource);
Thread.MemoryBarrier();
_guessingThreadsRunning--;
Thread.MemoryBarrier();
if (result != null)
{
_passwordFound = result;
OnPasswordFound(new PasswordFoundEventArgs(_passwordFound));
}
else if (_guessingThreadsRunning == 0)
{
OnPasswordNotFound(EventArgs.Empty);
}
if (_guessingThreadsRunning == 0)
{
fileStream.Close();
OnCompleted(EventArgs.Empty);
}
}));
}
}
//--- Public Methods ---
public void StartAttack(string databasePath, int numThreads, IPasswordSource passwordSource)
{
if (numThreads <= 0)
throw new ArgumentOutOfRangeException("numThreads");
lock (_syncLock)
{
if (_started)
throw new InvalidOperationException();
_started = true;
}
if (!PerformSelfTest())
throw new Exception("Self test failed");
var fileStream = new FileStream(databasePath, FileMode.Open, FileAccess.Read);
DatabaseOpener databaseOpener = new DatabaseOpener(fileStream);
stopwatch.Start();
for (int i = 0; i < numThreads; i++)
{
EasyThread.BeginInvoke(new EasyThreadMethod(
() =>
{
Thread.MemoryBarrier();
_guessingThreadsRunning++;
Thread.MemoryBarrier();
string result = AttackThread(databaseOpener, passwordSource);
Thread.MemoryBarrier();
_guessingThreadsRunning--;
Thread.MemoryBarrier();
if (result != null)
{
_passwordFound = result;
OnPasswordFound(new PasswordFoundEventArgs(_passwordFound));
}
else if (_guessingThreadsRunning == 0)
{
OnPasswordNotFound(EventArgs.Empty);
}
if (_guessingThreadsRunning == 0)
{
fileStream.Close();
OnCompleted(EventArgs.Empty);
}
}));
}
}
string AttackThread(DatabaseOpener cracker, IPasswordSource passwordSource)
{
string passwordGuess;
while (true)
{
if (_stopWorking)
return null;
if (_passwordFound != null)
return null;
passwordGuess = passwordSource.NextPassword();
if (passwordGuess == null)
return null;
if (cracker.TryKey(passwordGuess))
break;
Thread.MemoryBarrier();
_guessCounter++;
_lastGuess = passwordGuess;
}
return passwordGuess;
}