private void button3_Click(object sender, EventArgs e)
{
using (OpenFileDialog ofd = new OpenFileDialog()
{
Filter = "xml|*.xml"
}) {
if (ofd.ShowDialog() == DialogResult.Cancel)
{
return;
}
try {
var rsa = new advRSA();
using (var sr = new StreamReader(ofd.FileName))
rsa.FromXmlString(sr.ReadToEnd());
txtE.Text = rsa.E.ToString();
txtD.Text = rsa.D.ToString();
txtN.Text = rsa.N.ToString();
} catch (FileNotFoundException) {
MessageBox.Show("File not found.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
catch (Exception ex) {
MessageBox.Show("File is incorrect.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
ex.Log();
}
}
}
public virtual void SaveRSA(advRSA rsa)
{
using (MemoryStream MemStream = new MemoryStream()) {
short head = (short)(rsa.N.GetByteCount() / 4 - 32);
if (head > 127)
{
throw new Exception("N is too big.");
}
head |= (short)(rsa.E.GetByteCount() << 8);
head |= 0x80; // RSA flag
MemStream.Write(BitConverter.GetBytes(head), 0, 2);
byte[] data = GetSaveData();
var hash = SHA512.Create().ComputeHash(data);
hash = rsa.GetSignature(hash);
MemStream.Write(BitConverter.GetBytes((short)(hash.Length)), 0, 2);
var key = rsa.N.ToByteArray();
MemStream.Write(key, 0, key.Length);
key = rsa.E.ToByteArray();
MemStream.Write(key, 0, key.Length);
MemStream.Write(hash, 0, hash.Length);
MemStream.Write(data, 0, data.Length);
MemStream.Seek(0, SeekOrigin.Begin);
using (FileStream fs = new FileStream(FileName, FileMode.Create)) {
using (GZipStream ZipStream = new GZipStream(fs, CompressionMode.Compress)) {
MemStream.CopyTo(ZipStream);
}
}
}
}
public static DialogResult GetKeys(ref advRSA rsa)
{
using (var frm = new frmKeyDialog()) {
frm.ShowDialog();
if (frm.result == DialogResult.OK)
{
rsa.E = BigInteger.Parse(frm.txtE.Text);
rsa.D = BigInteger.Parse(frm.txtD.Text);
rsa.N = BigInteger.Parse(frm.txtN.Text);
}
return(frm.result);
}
}
