// ReSharper restore AccessToStaticMemberViaDerivedType
private void btnCompute_Click(object sender, EventArgs e)
{
try
{
var fs = File.OpenRead(_filePath);
var blockSize = chkEntireFile.Checked ? fs.Length : Int32.Parse(cbComputeBlockSize.Text);
var blocks = chkEntireFile.Checked ? 1 : Int32.Parse(txtBlocks.Text);
var block = new byte[blockSize];
setHashAlgorithm();
progressBar.Maximum = (blocks > 0 ? blocks : (int)(fs.Length / blockSize));
progressBar.Value = 0;
var sb = new StringBuilder();
fs.Seek(Int32.Parse(txtOffset.Text), SeekOrigin.Begin);
int readBytes;
do
{
var pos = fs.Position;
readBytes = fs.Read(block, 0, (int)blockSize);
var hash = _ha != null?_ha.ComputeHash(block) : CRC16.GetCRC(block);
sb.Append("@" + pos.ToString("X7") + ": " + byteArrayToString(hash) + Environment.NewLine);
blocks--;
progressBar.PerformStep();
} while (readBytes == blockSize && blocks != 0);
// Show results
txtList.Text = sb.ToString();
fs.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void superBruteForce_DoWork(object sender, DoWorkEventArgs e)
{
var worker = (BackgroundWorker)sender;
try
{
var fileBuffer = File.ReadAllBytes(_filePath);
worker.ReportProgress(0, new ValueObject(fileBuffer.Length));
for (var blockSize = 64; blockSize <= fileBuffer.Length; blockSize += 4)
{
worker.ReportProgress(1, new ValueObject(fileBuffer.Length - blockSize));
for (var offset = 0; offset < fileBuffer.Length - blockSize; offset += 4)
{
if (worker.CancellationPending)
{
e.Cancel = true;
return;
}
var hash = _ha != null?_ha.ComputeHash(fileBuffer, offset, blockSize) : CRC16.GetCRC(fileBuffer, offset, blockSize);
if (_searchKey[0] == hash[0]) // 1:256 probability
{
if (memcmp(_searchKey, hash, _searchKey.Length) == 0) //key found!!!
{
e.Result = "@" + offset.ToString("X7") + " of " + blockSize + " : " + byteArrayToString(hash);
return;
}
}
if (!chkHighCPU.Checked && (offset % 64) == 0)
{
System.Threading.Thread.Sleep(1); //let the cpu cool off
}
worker.ReportProgress(11, new ValueObject(offset));
}
worker.ReportProgress(10, new ValueObject(blockSize));
}
e.Result = "Search key not found.";
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
