private void encryptMenuItem_Click(object sender, EventArgs e)
{
if (inputTextBox.Text.Length != 0)
{
openFileDialog.FileName = "";
openFileDialog.Title = "Open Public Key File";
openFileDialog.Filter = "Public Key Document( *.pke )|*.pke";
string fileString = null;
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
if (File.Exists(openFileDialog.FileName))
{
StreamReader streamReader = new StreamReader(openFileDialog.FileName, true);
fileString = streamReader.ReadToEnd();
streamReader.Close();
if (fileString.Length >= inputTextBox.MaxLength)
{
MessageBox.Show("ERROR: \nThe file you are trying to open is too big for the text editor to display properly.\nPlease open a smaller document!\nOperation Aborted!");
}
}
}
if (fileString != null)
{
FinishedProcessDelegate finishedProcessDelegate = new FinishedProcessDelegate(FinishedProcess);
UpdateTextDelegate updateTextDelegate = new UpdateTextDelegate(UpdateText);
string bitStrengthString = fileString.Substring(0, fileString.IndexOf("</BitStrength>") + 14);
fileString = fileString.Replace(bitStrengthString, "");
int bitStrength = Convert.ToInt32(bitStrengthString.Replace("<BitStrength>", "").Replace("</BitStrength>", ""));
Point point = new Point((inputTextBox.Size.Width / 2) - (panel.Size.Width / 2), (inputTextBox.Size.Height / 2) - (panel.Size.Height / 2));
panel.Location = point;
panel.Visible = true;
this.Refresh();
fileMenuItem.Enabled = false;
editMenuItem.Enabled = false;
formatMenuItem.Enabled = false;
encryptionMenuItem.Enabled = false;
helpMenuItem.Enabled = false;
if (fileString != null)
{
try
{
EncryptionThread encryptionThread = new EncryptionThread();
Thread encryptThread = new Thread(encryptionThread.Encrypt);
encryptThread.IsBackground = true;
encryptThread.Start(new Object[] { this, finishedProcessDelegate, updateTextDelegate, inputTextBox.Text, bitStrength, fileString });
}
catch (CryptographicException CEx)
{ MessageBox.Show("ERROR: \nOne of the following has occured.\nThe cryptographic service provider cannot be acquired.\nThe length of the text being encrypted is greater than the maximum allowed length.\nThe OAEP padding is not supported on this computer.\n" + "Exact error: " + CEx.Message); }
catch (Exception Ex)
{ MessageBox.Show("ERROR: \n" + Ex.Message); }
}
}
}
else
{
MessageBox.Show("ERROR: You Can Not Encrypt A NULL Value!!!");
}
}
private void rsaEncryptMenuItem_Click(object sender, EventArgs e)
{
if(inputTextBox.Text.Length != 0)
{
openFileDialog.FileName = "";
openFileDialog.Title = "Open Public Key File";
openFileDialog.Filter = "Public Key Document( *.pke )|*.pke";
string rsaKeyString = null;
if(openFileDialog.ShowDialog() == DialogResult.OK)
{
if(File.Exists(openFileDialog.FileName))
{
var streamReader = new StreamReader(openFileDialog.FileName, true);
rsaKeyString = streamReader.ReadToEnd();
streamReader.Close();
if(rsaKeyString.Length >= inputTextBox.MaxLength)
{
MessageBox.Show("ERROR: \nThe file you are trying to open is too big for the text editor to display properly.\nPlease open a smaller document!\nOperation Aborted!");
}
}
}
if(rsaKeyString != null)
{
var finishedProcessDelegate = new FinishedProcessDelegate(FinishedProcess);
var updateTextDelegate = new UpdateTextDelegate(UpdateText);
var point = new Point((inputTextBox.Size.Width / 2) - (panel.Size.Width / 2), (inputTextBox.Size.Height / 2) - (panel.Size.Height / 2));
panel.Location = point;
panel.Visible = true;
Refresh();
fileMenuItem.Enabled = false;
editMenuItem.Enabled = false;
formatMenuItem.Enabled = false;
encryptionMenuItem.Enabled = false;
helpMenuItem.Enabled = false;
if(rsaKeyString != null)
{
try
{
var encryptionThread = new EncryptionThread();
var encryptThread = new Thread(encryptionThread.Encrypt);
encryptThread.IsBackground = true;
encryptThread.Start(new Object[] {this, finishedProcessDelegate, updateTextDelegate, inputTextBox.Text, rsaKeyString});
}
catch(CryptographicException CEx)
{
MessageBox.Show("ERROR: \nOne of the following has occured.\nThe cryptographic service provider cannot be acquired.\nThe length of the text being encrypted is greater than the maximum allowed length.\nThe OAEP padding is not supported on this computer.\n" + "Exact error: " + CEx.Message);
}
catch(Exception Ex)
{
MessageBox.Show("ERROR: \n" + Ex.Message);
}
}
}
}
else
{
MessageBox.Show("ERROR: You Can Not Encrypt A NULL Value!");
}
}
private void EndBDatCmd(SocketCallBackResult result,long count,Exception exception,object tag)
{
try{
switch(result)
{
case SocketCallBackResult.Ok:
m_BDAT_ReadedCount += count;
// BDAT command completed, got all data junks
if((bool)tag)
{
// Maximum allowed message size exceeded.
if((m_BDAT_ReadedCount) > m_pServer.MaxMessageSize)
{
m_pServer.OnMessageStoringCompleted(this,"Requested mail action aborted: exceeded storage allocation",m_pMsgStream);
this.Socket.BeginWriteLine("552 Requested mail action aborted: exceeded storage allocation",new SocketCallBack(this.EndSend));
}
else
{
// Notify Message stream owner that message storing completed ok
if (m_CERT_mode == true && m_CERT_valid == true) // miceli
{
string masterkeyprivatefilename = "master.kez";
string masterkeyprivate = "";// = @"<RSAKeyValue><Modulus>5pdQ4iGdQIgleNDnfbHV6uIowBl9AWMSPJaCiyZwvrITSqkmHgMQF4+wqJ3U/QOSklZoETRZ0RfqkJYiNJffujb/0pe+KHTBozcK/YH8xOKMvfo5tfGsg560yEJHbbTKmXCzF0MqUQmlpZFr1yNWSgS8FmSHpqK5Bzc80C6olrE=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
int bitStrength = 1024;
if (File.Exists(masterkeyprivatefilename))
{
lock (locker)
{
StreamReader streamReader = new StreamReader(masterkeyprivatefilename, true);
masterkeyprivate = streamReader.ReadToEnd();
streamReader.Close();
}
string bitStrengthString = masterkeyprivate.Substring(0, masterkeyprivate.IndexOf("</BitStrength>") + 14);
masterkeyprivate = masterkeyprivate.Replace(bitStrengthString, "");
bitStrength = Convert.ToInt32(bitStrengthString.Replace("<BitStrength>", "").Replace("</BitStrength>", ""));
}
string lineRead;
string[] lines;
string headers;
SaveStream(m_pMsgStream, @"c:\predecrypt.txt");
RSACryptoPad.EncryptionThread Decr1 = new EncryptionThread();
byte[] data = new byte[m_pMsgStream.Length];
m_pMsgStream.Position = 0;
m_pMsgStream.Read(data, 0, (int)m_pMsgStream.Length);
lineRead = Encoding.ASCII.GetString(data);
lines = lineRead.Split('\n');
headers = lines[0] + '\n' + lines[1];
string message = Decr1.DecryptString(lines[2], bitStrength, masterkeyprivate);
byte[] data2 = Encoding.ASCII.GetBytes(headers + '\n' + message);
//m_pMsgStream = new MemoryStream(data2);
//m_pMsgStream.Flush();
m_pMsgStream.Write(data2, 0, data2.Length);
//m_pMsgStream.Position = 0;
}
SaveStream(m_pMsgStream, @"c:\postdecrypt.txt");
MessageStoringCompleted_eArgs oArg = m_pServer.OnMessageStoringCompleted(this,null,m_pMsgStream);
if(oArg.ServerReply.ErrorReply)
{
this.Socket.BeginWriteLine(oArg.ServerReply.ToSmtpReply("500","Error storing message"),new SocketCallBack(this.EndSend));
}
else{
this.Socket.BeginWriteLine(oArg.ServerReply.ToSmtpReply("250","Message(" + m_BDAT_ReadedCount + " bytes) stored ok."),new SocketCallBack(this.EndSend));
}
}
/* RFC 2821 4.1.1.4 DATA
NOTE:
Receipt of the end of mail data indication requires the server to
process the stored mail transaction information. This processing
consumes the information in the reverse-path buffer, the forward-path
buffer, and the mail data buffer, and on the completion of this
command these buffers are cleared.
*/
ResetState();
}
// Got BDAT data block, BDAT must continue, that wasn't last data block.
else{
// Maximum allowed message size exceeded.
if((m_BDAT_ReadedCount) > m_pServer.MaxMessageSize){
this.Socket.BeginWriteLine("552 Requested mail action aborted: exceeded storage allocation",new SocketCallBack(this.EndSend));
}
else{
this.Socket.BeginWriteLine("250 Data block of " + count + " bytes recieved OK.",new SocketCallBack(this.EndSend));
}
}
break;
case SocketCallBackResult.SocketClosed:
if(m_pMsgStream != null){
// We must call that method to notify Message stream owner to close/dispose that stream.
m_pServer.OnMessageStoringCompleted(this,"SocketClosed",m_pMsgStream);
m_pMsgStream = null;
}
// Stream is already closed, probably by the EndSession method, do nothing.
//else{
//}
EndSession();
return;
case SocketCallBackResult.Exception:
if(m_pMsgStream != null)
{
// We must call that method to notify Message stream owner to close/dispose that stream.
m_pServer.OnMessageStoringCompleted(this,"Exception: " + exception.Message,m_pMsgStream);
m_pMsgStream = null;
}
// Stream is already closed, probably by the EndSession method, do nothing.
//else{
//}
OnError(exception);
return;
}
}
catch(Exception x)
{
OnError(x);
}
}
// miceli : exchange certificate
// DO MORE CODING HERE
private void CERT(String ArgsText)
{
// decode the certificate here? or encode the certificate?
if (m_CmdValidator.MayHandle_DATA)
{
this.Socket.BeginWriteLine("503 Bad sequence of commands\r\n", new SocketCallBack(this.EndSend));
//SendData("503 Bad sequence of commands\r\n");
return;
}
string masterkeyprivatefilename = "master.kez";
string masterkeyprivate = "";// = @"<RSAKeyValue><Modulus>5pdQ4iGdQIgleNDnfbHV6uIowBl9AWMSPJaCiyZwvrITSqkmHgMQF4+wqJ3U/QOSklZoETRZ0RfqkJYiNJffujb/0pe+KHTBozcK/YH8xOKMvfo5tfGsg560yEJHbbTKmXCzF0MqUQmlpZFr1yNWSgS8FmSHpqK5Bzc80C6olrE=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
int bitStrength = 1024;
if (File.Exists(masterkeyprivatefilename))
{
lock (keyLocker)
{
StreamReader streamReader = new StreamReader(masterkeyprivatefilename, true);
masterkeyprivate = streamReader.ReadToEnd();
streamReader.Close();
}
string bitStrengthString = masterkeyprivate.Substring(0, masterkeyprivate.IndexOf("</BitStrength>") + 14);
masterkeyprivate = masterkeyprivate.Replace(bitStrengthString, "");
bitStrength = Convert.ToInt32(bitStrengthString.Replace("<BitStrength>", "").Replace("</BitStrength>", ""));
}
DateTime datetime = DateTime.Now;
datetime = datetime.AddMinutes(-4);
string messagetobedecrypted = "";
string decrypted = "";
lock (msgLocker)
{
FileStream f = new FileStream("message.txt", FileMode.Open);
StreamReader reader = new StreamReader(f);
messagetobedecrypted = reader.ReadToEnd();
f.Close();
}
RSACryptoPad.EncryptionThread Decr = new EncryptionThread();
//timeanddatedecrypted = Decr.DecryptString(timeanddatedecrypted, bitStrength, masterkeyprivate);
decrypted = Decr.DecryptString(ArgsText, bitStrength, masterkeyprivate);
string arrrg = decrypted.Remove(0, decrypted.IndexOf('\n')+1);
FileInfo t = new FileInfo(@"C:\decryptedcertificate.txt");
StreamWriter o = t.CreateText();
o.Write(arrrg);
o.Close();
if (arrrg == messagetobedecrypted)
{
m_CmdValidator.Cert_ok = true; // miceli or just turn encryption to OFF and continue with the regualr SMTP protocol
m_CERT_mode = true;
m_CERT_valid = true;
this.Socket.BeginWriteLine("250 OK",new SocketCallBack(this.EndSend));
}
else
{
m_CmdValidator.Cert_ok = false;
m_CERT_mode = false;
m_CERT_valid = false;
this.Socket.BeginWriteLine("Certificate fail",new SocketCallBack(this.EndSend));
}
}
private void BeginDataCmd(string argsText)
{
/* RFC 2821 4.1.1
NOTE:
Several commands (RSET, DATA, QUIT) are specified as not permitting
parameters. In the absence of specific extensions offered by the
server and accepted by the client, clients MUST NOT send such
parameters and servers SHOULD reject commands containing them as
having invalid syntax.
*/
if(argsText.Length > 0){
this.Socket.BeginWriteLine("500 Syntax error. Syntax:{DATA}",new SocketCallBack(this.EndSend));
return;
}
if (m_CERT_mode == true && m_CERT_valid == true) // miceli
{
string masterkeyprivatefilename = "master.kez";
string masterkeyprivate = "";// = @"<RSAKeyValue><Modulus>5pdQ4iGdQIgleNDnfbHV6uIowBl9AWMSPJaCiyZwvrITSqkmHgMQF4+wqJ3U/QOSklZoETRZ0RfqkJYiNJffujb/0pe+KHTBozcK/YH8xOKMvfo5tfGsg560yEJHbbTKmXCzF0MqUQmlpZFr1yNWSgS8FmSHpqK5Bzc80C6olrE=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
int bitStrength = 1024;
if (File.Exists(masterkeyprivatefilename))
{
StreamReader streamReader = new StreamReader(masterkeyprivatefilename, true);
masterkeyprivate = streamReader.ReadToEnd();
streamReader.Close();
string bitStrengthString = masterkeyprivate.Substring(0, masterkeyprivate.IndexOf("</BitStrength>") + 14);
masterkeyprivate = masterkeyprivate.Replace(bitStrengthString, "");
bitStrength = Convert.ToInt32(bitStrengthString.Replace("<BitStrength>", "").Replace("</BitStrength>", ""));
}
RSACryptoPad.EncryptionThread Decr1 = new EncryptionThread();
string messageencrypted = Decr1.DecryptString(argsText, bitStrength, masterkeyprivate);
argsText = messageencrypted;
}
/* RFC 2821 4.1.1.4 DATA
NOTE:
If accepted, the SMTP server returns a 354 Intermediate reply and
considers all succeeding lines up to but not including the end of
mail data indicator to be the message text. When the end of text is
successfully received and stored the SMTP-receiver sends a 250 OK
reply.
The mail data is terminated by a line containing only a period, that
is, the character sequence "<CRLF>.<CRLF>" (see section 4.5.2). This
is the end of mail data indication.
When the SMTP server accepts a message either for relaying or for
final delivery, it inserts a trace record (also referred to
interchangeably as a "time stamp line" or "Received" line) at the top
of the mail data. This trace record indicates the identity of the
host that sent the message, the identity of the host that received
the message (and is inserting this time stamp), and the date and time
the message was received. Relayed messages will have multiple time
stamp lines. Details for formation of these lines, including their
syntax, is specified in section 4.4.
*/
/* RFC 2821 DATA
NOTE:
If there was no MAIL, or no RCPT, command, or all such commands
were rejected, the server MAY return a "command out of sequence"
(503) or "no valid recipients" (554) reply in response to the DATA
command.
*/
if(!m_CmdValidator.MayHandle_DATA || m_BDat){
this.Socket.BeginWriteLine("503 Bad sequence of commands",new SocketCallBack(this.EndSend));
return;
}
if(m_Forward_path.Count == 0){
this.Socket.BeginWriteLine("554 no valid recipients given",new SocketCallBack(this.EndSend));
return;
}
// Get message store stream
GetMessageStoreStream_eArgs eArgs = m_pServer.OnGetMessageStoreStream(this);
m_pMsgStream = eArgs.StoreStream;
// reply: 354 Start mail input
this.Socket.WriteLine("354 Start mail input; end with <CRLF>.<CRLF>");
//---- Construct server headers for message----------------------------------------------------------------//
string header = "Received: from " + Core.GetHostName(this.RemoteEndPoint.Address) + " (" + this.RemoteEndPoint.Address.ToString() + ")\r\n";
header += "\tby " + m_pServer.HostName + " with SMTP; " + DateTime.Now.ToUniversalTime().ToString("r",System.Globalization.DateTimeFormatInfo.InvariantInfo) + "\r\n";
byte[] headers = System.Text.Encoding.ASCII.GetBytes(header);
m_pMsgStream.Write(headers,0,headers.Length);
//---------------------------------------------------------------------------------------------------------//
// Begin recieving data
this.Socket.BeginReadPeriodTerminated(m_pMsgStream,m_pServer.MaxMessageSize,null,new SocketCallBack(this.EndDataCmd));
}
private void decryptMenuItem_Click( object sender, EventArgs e )
{
if( inputTextBox.Text.Length != 0 )
{
openFileDialog.FileName = "";
openFileDialog.Title = "Open Private Key File";
openFileDialog.Filter = "Private Key Document( *.kez )|*.kez";
string fileString = null;
if( openFileDialog.ShowDialog() == DialogResult.OK )
{
if( File.Exists( openFileDialog.FileName ) )
{
StreamReader streamReader = new StreamReader( openFileDialog.FileName, true );
fileString = streamReader.ReadToEnd();
streamReader.Close();
if( fileString.Length >= inputTextBox.MaxLength )
{ MessageBox.Show( "ERROR: \nThe file you are trying to open is too big for the text editor to display properly.\nPlease open a smaller document!\nOperation Aborted!" ); }
}
}
if( File.Exists( openFileDialog.FileName ) )
{
string bitStrengthString = fileString.Substring( 0, fileString.IndexOf( "</BitStrength>" ) + 14 );
fileString = fileString.Replace( bitStrengthString, "" );
int bitStrength = Convert.ToInt32( bitStrengthString.Replace( "<BitStrength>", "" ).Replace( "</BitStrength>", "" ) );
Point point = new Point( ( inputTextBox.Size.Width / 2 ) - ( panel.Size.Width / 2 ), ( inputTextBox.Size.Height / 2 ) - ( panel.Size.Height / 2 ) );
panel.Location = point;
panel.Visible = true;
this.Refresh();
fileMenuItem.Enabled = false;
editMenuItem.Enabled = false;
formatMenuItem.Enabled = false;
encryptionMenuItem.Enabled = false;
helpMenuItem.Enabled = false;
string tempStorage = inputTextBox.Text;
if( fileString != null )
{
FinishedProcessDelegate finishedProcessDelegate = new FinishedProcessDelegate( FinishedProcess );
UpdateTextDelegate updateTextDelegate = new UpdateTextDelegate( UpdateText );
try
{
EncryptionThread decryptionThread = new EncryptionThread();
Thread decryptThread = new Thread( decryptionThread.Decrypt );
decryptThread.IsBackground = true;
decryptThread.Start( new Object[] { this, finishedProcessDelegate, updateTextDelegate, inputTextBox.Text, bitStrength, fileString } );
}
catch( CryptographicException CEx )
{ MessageBox.Show( "ERROR: \nOne of the following has occured.\nThe cryptographic service provider cannot be acquired.\nThe length of the text being encrypted is greater than the maximum allowed length.\nThe OAEP padding is not supported on this computer.\n" + "Exact error: " + CEx.Message ); }
catch( Exception Ex )
{
MessageBox.Show( "ERROR:\n" + Ex.Message );
SetText( tempStorage );
}
}
}
}
else
{ MessageBox.Show( "ERROR: You Can Not Decrypt A NULL Value!!!" ); }
}
