public override int Read(byte[] buffer, int offset, int count)
{
if (position == 0 && zipEntry.IsCrypted && ((ZipInputStream)zipStream).Password == null && PasswordRequired != null)
{
CompressionPasswordRequiredEventArgs e = new CompressionPasswordRequiredEventArgs();
PasswordRequired(this, e);
if (e.ContinueOperation && e.Password.Length > 0)
{
((ZipInputStream)zipStream).Password = e.Password;
}
}
// TODO: always save to a local temp circular buffer for optimization of the backwards seek.
int total = zipStream.Read(buffer, offset, count);
position += total;
if (ExtractionProgress != null)
{
CompressionExtractionProgressEventArgs e = new CompressionExtractionProgressEventArgs();
e.BytesExtracted = position;
e.FileName = zipEntry.Name;
e.FileSize = zipEntry.Size;
e.PercentComplete = 100.0 * position / zipEntry.Size;
ExtractionProgress(this, e);
}
return(total);
}
private void PasswordRequired(object sender, CompressionPasswordRequiredEventArgs e)
{
this.Invoke((MethodInvoker) delegate()
{
frmPassword dlg = new frmPassword();
if (dlg.ShowDialog(this) == DialogResult.OK)
{
e.Password = dlg.txtPassword.Text;
e.ContinueOperation = true;
}
else
{
e.ContinueOperation = false;
}
});
}
protected virtual int OnPasswordRequired(IntPtr p1, int p2)
{
int result = -1;
if (this.PasswordRequired != null)
{
CompressionPasswordRequiredEventArgs e = new CompressionPasswordRequiredEventArgs();
this.PasswordRequired(this, e);
if (e.ContinueOperation && e.Password.Length > 0)
{
for (int i = 0; (i < e.Password.Length) && (i < p2); i++)
{
Marshal.WriteByte(p1, i, (byte)e.Password[i]);
}
Marshal.WriteByte(p1, e.Password.Length, (byte)0);
result = 1;
}
}
else
{
throw new IOException("Password is required for extraction.");
}
return(result);
}
