/// <summary>
/// Is called if command is recieved.
/// </summary>
/// <param name="result"></param>
/// <param name="exception"></param>
/// <param name="count"></param>
/// <param name="tag"></param>
private void EndRecieveCmd(SocketCallBackResult result, long count, Exception exception, object tag)
{
try
{
switch (result)
{
case SocketCallBackResult.Ok:
MemoryStream strm = (MemoryStream)tag;
string cmdLine = System.Text.Encoding.Default.GetString(strm.ToArray());
// if(m_pServer.LogCommands)
// {
// m_pLogWriter.AddEntry(cmdLine + "<CRLF>",this.SessionID,this.RemoteEndPoint.Address.ToString(),"C");
// }
// Exceute command
if (SwitchCommand(cmdLine))
{
// Session end, close session
EndSession();
}
break;
case SocketCallBackResult.LengthExceeded:
this.Socket.WriteLine("500 Line too long.");
BeginRecieveCmd();
break;
case SocketCallBackResult.SocketClosed:
EndSession();
break;
case SocketCallBackResult.Exception:
OnError(exception);
break;
}
}
catch (Exception x)
{
OnError(x);
}
}
/// <summary>
/// Is called if command is recieved.
/// </summary>
/// <param name="result"></param>
/// <param name="exception"></param>
/// <param name="count"></param>
/// <param name="tag"></param>
private void EndRecieveCmd(SocketCallBackResult result, long count, Exception exception, object tag)
{
try
{
switch (result)
{
case SocketCallBackResult.Ok:
MemoryStream strm = (MemoryStream)tag;
string cmdLine = System.Text.Encoding.Default.GetString(strm.ToArray());
// Exceute command
if (SwitchCommand(cmdLine))
{
// Session end, close session
EndSession();
}
break;
case SocketCallBackResult.LengthExceeded:
this.Socket.WriteLine("-ERR Line too long.");
BeginRecieveCmd();
break;
case SocketCallBackResult.SocketClosed:
EndSession();
break;
case SocketCallBackResult.Exception:
OnError(exception);
break;
}
}
catch (Exception x)
{
OnError(x);
}
}
/// <summary>
/// Is called if command is recieved.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void EndRecieveCmd(SocketCallBackResult result,long count,Exception exception,object tag)
{
try{
switch(result)
{
case SocketCallBackResult.Ok:
MemoryStream strm = (MemoryStream)tag;
string cmdLine = System.Text.Encoding.Default.GetString(strm.ToArray());
// Exceute command
if(SwitchCommand(cmdLine)){
// Session end, close session
EndSession();
}
break;
case SocketCallBackResult.LengthExceeded:
this.Socket.WriteLine("500 Line too long.");
BeginRecieveCmd();
break;
case SocketCallBackResult.SocketClosed:
EndSession();
break;
case SocketCallBackResult.Exception:
OnError(exception);
break;
}
}
catch(ReadException x){
if(x.ReadReplyCode == ReadReplyCode.LengthExceeded){
this.Socket.WriteLine("500 Line too long.");
BeginRecieveCmd();
}
else if(x.ReadReplyCode == ReadReplyCode.SocketClosed){
EndSession();
}
else if(x.ReadReplyCode == ReadReplyCode.UnKnownError){
OnError(x);
}
}
catch(Exception x){
OnError(x);
}
}
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.
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);
}
}
/// <summary>
/// Is called when smtp client has finished reading MESSAGE send smtp server response line.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnDataMessageSendReadServerResponseFinished(SocketCallBackResult result,
long count,
Exception exception,
object tag)
{
CommadCompleted callback = (CommadCompleted) (((object[]) tag)[0]);
try
{
// TODO: some servers close connection after DATA command, hanndle Socket closed.
if (result == SocketCallBackResult.Ok)
{
string responseLine =
Encoding.ASCII.GetString(((MemoryStream) (((object[]) tag)[1])).ToArray());
// Response line must start with 250 or otherwise it's error response
if (!responseLine.StartsWith("250"))
{
throw new Exception(responseLine);
}
else
{
// DATA: completed susscessfully, call callback method.
callback(SocketCallBackResult.Ok, null);
}
}
else
{
HandleSocketError(result, exception);
}
}
catch (Exception x)
{
// Pass exception to callback method
callback(SocketCallBackResult.Exception, x);
}
}
/// <summary>
/// Is called when smtp client has finished reading DATA command server response line.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnDataReadServerResponseFinished(SocketCallBackResult result,
long count,
Exception exception,
object tag)
{
CommadCompleted callback = (CommadCompleted) (((object[]) tag)[1]);
try
{
if (result == SocketCallBackResult.Ok)
{
string responseLine =
Encoding.ASCII.GetString(((MemoryStream) (((object[]) tag)[2])).ToArray());
// Response line must start with 334 or otherwise it's error response
if (!responseLine.StartsWith("354"))
{
throw new Exception(responseLine);
}
else
{
Stream message = (Stream) (((object[]) tag)[0]);
// Start sending message to smtp server
m_pSocket.BeginWritePeriodTerminated(message, callback, OnDataMessageSendFinished);
}
}
else
{
HandleSocketError(result, exception);
}
}
catch (Exception x)
{
// Pass exception to callback method
callback(SocketCallBackResult.Exception, x);
}
}
/// <summary>
/// Is called when smtp client has finished BDAT command sending.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnBdatSendFinished(SocketCallBackResult result,
long count,
Exception exception,
object tag)
{
CommadCompleted callback = (CommadCompleted) (((object[]) tag)[1]);
try
{
if (result == SocketCallBackResult.Ok)
{
// BDAT command successfully sent to SMTP server, start sending DATA.
m_pSocket.BeginWrite((Stream) (((object[]) tag)[0]), callback, OnBdatDataSendFinished);
}
else
{
HandleSocketError(result, exception);
}
}
catch (Exception x)
{
// Pass exception to callback method
callback(SocketCallBackResult.Exception, x);
}
}
/// <summary>
/// Is called when smtp client has finished reading AUTH LOGIN password send server response line.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnAuthLoginPwdReadServerResponseFinished(SocketCallBackResult result,
long count,
Exception exception,
object tag)
{
Auth_state_data stateData = (Auth_state_data) tag;
try
{
if (result == SocketCallBackResult.Ok)
{
string responseLine = Encoding.ASCII.GetString(((MemoryStream) stateData.Tag).ToArray());
// Response line must start with 235 or otherwise it's error response
if (!responseLine.StartsWith("235"))
{
throw new Exception(responseLine);
}
else
{
m_Authenticated = true;
if (m_Authenticated && m_pSocket.Logger != null)
{
m_pSocket.Logger.UserName = stateData.UserName;
}
// AUTH LOGIN completed susscessfully, call callback method.
stateData.Callback(SocketCallBackResult.Ok, null);
}
}
else
{
HandleSocketError(result, exception);
}
}
catch (Exception x)
{
// Pass exception to callback method
stateData.Callback(SocketCallBackResult.Exception, x);
}
}
/// <summary>
/// Is called when smtp client has finished reading AUTH LOGIN user send server response line.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnAuthLoginUserReadServerResponseFinished(SocketCallBackResult result,
long count,
Exception exception,
object tag)
{
Auth_state_data stateData = (Auth_state_data) tag;
try
{
if (result == SocketCallBackResult.Ok)
{
string responseLine = Encoding.ASCII.GetString(((MemoryStream) stateData.Tag).ToArray());
// Response line must start with 334 or otherwise it's error response
if (!responseLine.StartsWith("334"))
{
throw new Exception(responseLine);
}
else
{
// Start sending password to server
m_pSocket.BeginWriteLine(
Convert.ToBase64String(Encoding.ASCII.GetBytes(stateData.Password)),
stateData,
OnAuthLoginPasswordSendFinished);
}
}
else
{
HandleSocketError(result, exception);
}
}
catch (Exception x)
{
// Pass exception to callback method
stateData.Callback(SocketCallBackResult.Exception, x);
}
}
/// <summary>
/// Is called if command is recieved.
/// </summary>
/// <param name="result"></param>
/// <param name="exception"></param>
/// <param name="count"></param>
/// <param name="tag"></param>
private void EndRecieveCmd(SocketCallBackResult result,long count,Exception exception,object tag)
{
try{
switch(result)
{
case SocketCallBackResult.Ok:
MemoryStream strm = (MemoryStream)tag;
string cmdLine = System.Text.Encoding.Default.GetString(strm.ToArray());
if(m_pServer.LogCommands){
m_pLogWriter.AddEntry(cmdLine + "<CRLF>",this.SessionID,this.RemoteEndPoint.Address.ToString(),"C");
}
// Exceute command
if(SwitchCommand(cmdLine)){
// Session end, close session
EndSession();
}
break;
case SocketCallBackResult.LengthExceeded:
SendData("-ERR Line too long.\r\n");
BeginRecieveCmd();
break;
case SocketCallBackResult.SocketClosed:
EndSession();
break;
case SocketCallBackResult.Exception:
OnError(exception);
break;
}
}
catch(Exception x){
OnError(x);
}
}
/// <summary>
/// Is called when DATA command is finnished.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void EndAppendCmd(SocketCallBackResult result,long count,Exception exception,object tag)
{
try{
if(m_pServer.LogCommands){
m_pLogWriter.AddEntry("big binary " + count.ToString() + " bytes",this.SessionID,this.RemoteEndPoint.Address.ToString(),"S");
}
switch(result)
{
case SocketCallBackResult.Ok:
Hashtable param = (Hashtable)tag;
string cmdTag = (string)param["cmdTag"];
string mailbox = (string)param["mailbox"];
IMAP_MessageFlags mFlags = (IMAP_MessageFlags)param["mFlags"];
DateTime date = (DateTime)param["date"];
MemoryStream strm = (MemoryStream)param["strm"];
IMAP_Message msg = new IMAP_Message(null,"",0,mFlags,0,date);
string errotText = m_pServer.OnStoreMessage(this,mailbox,msg,strm.ToArray());
if(errotText == null){
SendData(cmdTag + " OK APPEND completed, recieved " + strm.Length + " bytes\r\n");
}
else{
SendData(cmdTag + " NO " + errotText + "\r\n");
}
break;
case SocketCallBackResult.LengthExceeded:
// SendData("552 Requested mail action aborted: exceeded storage allocation\r\n");
// BeginRecieveCmd();
break;
case SocketCallBackResult.SocketClosed:
EndSession();
return;
case SocketCallBackResult.Exception:
OnError(exception);
return;
}
// Command completed ok, get next command
BeginRecieveCmd();
}
catch(Exception x){
OnError(x);
}
}
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);
}
}
/// <summary>
/// Is called when DATA command is finnished.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void EndDataCmd(SocketCallBackResult result,long count,Exception exception,object tag)
{
try{
// if(m_pServer.LogCommands){
// m_pLogWriter.AddEntry("big binary " + count.ToString() + " bytes",this.SessionID,this.RemoteEndPoint.Address.ToString(),"S");
// }
switch(result)
{
case SocketCallBackResult.Ok:
using(MemoryStream msgStream = Core.DoPeriodHandling(m_pMsgStream,false)){
// if(Core.ScanInvalid_CR_or_LF(msgStream)){
// m_pSocket.BeginSendLine("500 Message contains invalid CR or LF combination.",new SocketCallBack(this.EndSend));
// }
// else{
m_pMsgStream.SetLength(0);
// Store message
m_pMsgStream.Position = 0;
NewMail_EventArgs oArg = m_pServer.OnStoreMessage(this,msgStream);
// There is custom reply text, send it
if(oArg.ReplyText.Length > 0){
m_pSocket.BeginSendLine("250 " + oArg.ReplyText,new SocketCallBack(this.EndSend));
}
else{
m_pSocket.BeginSendLine("250 OK",new SocketCallBack(this.EndSend));
}
// }
}
break;
case SocketCallBackResult.LengthExceeded:
m_pSocket.BeginSendLine("552 Requested mail action aborted: exceeded storage allocation",new SocketCallBack(this.EndSend));
break;
case SocketCallBackResult.SocketClosed:
EndSession();
return;
case SocketCallBackResult.Exception:
OnError(exception);
return;
}
/* 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();
// Command completed ok, get next command
// BeginRecieveCmd();
}
catch(Exception x){
OnError(x);
}
}
/// <summary>
/// Is called when DATA command is finnished.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void EndDataCmd(SocketCallBackResult result,long count,Exception exception,object tag)
{
try{
if(m_pServer.LogCommands){
m_pLogWriter.AddEntry("big binary " + count.ToString() + " bytes",this.SessionID,this.RemoteEndPoint.Address.ToString(),"S");
}
switch(result)
{
case SocketCallBackResult.Ok:
using(MemoryStream msgStream = Core.DoPeriodHandling(m_pMsgStream,false)){
m_pMsgStream.SetLength(0);
// Store message
m_pServer.OnStoreMessage(this,msgStream);
SendData("250 OK\r\n");
}
break;
case SocketCallBackResult.LengthExceeded:
SendData("552 Requested mail action aborted: exceeded storage allocation\r\n");
BeginRecieveCmd();
break;
case SocketCallBackResult.SocketClosed:
EndSession();
return;
case SocketCallBackResult.Exception:
OnError(exception);
return;
}
/* 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();
// Command completed ok, get next command
BeginRecieveCmd();
}
catch(Exception x){
OnError(x);
}
}
private void ReadLineCompleted(SocketCallBackResult result,long count,Exception x,object tag)
{
// Accoridng RFC, we should get only "DONE" here.
if(result == SocketCallBackResult.Ok){
if(Encoding.Default.GetString(((MemoryStream)tag).ToArray()).ToUpperInvariant() == "DONE"){
// Send "cmd-tag OK IDLE terminated" to connected client.
m_pSession.Socket.WriteLine(m_CmdTag + " OK IDLE terminated");
m_pSession.BeginRecieveCmd();
Dispose();
}
// Connected client send illegal stuff us, end session.
else{
m_pSession.EndSession();
Dispose();
}
}
// Receive errors, probably TCP connection broken.
else{
m_pSession.EndSession();
Dispose();
}
}
/// <summary>
/// Is called if command is recieved.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void EndRecieveCmd(SocketCallBackResult result,long count,Exception exception,object tag)
{
try{
switch(result)
{
case SocketCallBackResult.Ok:
MemoryStream strm = (MemoryStream)tag;
string cmdLine = this.Socket.Encoding.GetString(strm.ToArray());
// Exceute command
if(SwitchCommand(cmdLine)){
// Session end, close session
EndSession();
}
break;
case SocketCallBackResult.LengthExceeded:
this.Socket.WriteLine("-ERR Line too long.");
BeginRecieveCmd();
break;
case SocketCallBackResult.SocketClosed:
EndSession();
break;
case SocketCallBackResult.Exception:
OnError(exception);
break;
}
}
catch(Exception x){
OnError(x);
}
}
/// <summary>
/// Is called when smtp client has finished reading AUTH CRAM-MD% server response line.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnAuthCramMd5ReadServerResponseFinished(SocketCallBackResult result,
long count,
Exception exception,
object tag)
{
Auth_state_data stateData = (Auth_state_data) tag;
try
{
if (result == SocketCallBackResult.Ok)
{
string responseLine = Encoding.ASCII.GetString(((MemoryStream) stateData.Tag).ToArray());
// Response line must start with 334 or otherwise it's error response
if (!responseLine.StartsWith("334"))
{
throw new Exception(responseLine);
}
else
{
string md5HashKey =
Encoding.ASCII.GetString(Convert.FromBase64String(responseLine.Split(' ')[1]));
HMACMD5 kMd5 = new HMACMD5(Encoding.ASCII.GetBytes(stateData.Password));
byte[] md5HashByte = kMd5.ComputeHash(Encoding.ASCII.GetBytes(md5HashKey));
string hashedPwd = BitConverter.ToString(md5HashByte).ToLower().Replace("-", "");
// Start sending user name to server
m_pSocket.BeginWriteLine(
Convert.ToBase64String(
Encoding.ASCII.GetBytes(stateData.UserName + " " + hashedPwd)),
stateData,
OnAuthCramMd5UserPwdSendFinished);
}
}
else
{
HandleSocketError(result, exception);
}
}
catch (Exception x)
{
// Pass exception to callback method
stateData.Callback(SocketCallBackResult.Exception, x);
}
}
/// <summary>
/// Is called when smtp client has finished reading DATA command server response line.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnDataReadServerResponseFinished(SocketCallBackResult result,long count,Exception exception,object tag)
{
CommadCompleted callback = (CommadCompleted)(((object[])tag)[1]);
try{
if(result == SocketCallBackResult.Ok){
string responseLine = System.Text.Encoding.ASCII.GetString(((MemoryStream)(((object[])tag)[2])).ToArray());
// Response line must start with 334 or otherwise it's error response
if(!responseLine.StartsWith("354")){
throw new Exception(responseLine);
}
else{
Stream message = (Stream)(((object[])tag)[0]);
message.Seek(0,SeekOrigin.End);
// Terminate message <CRLF>.<CRLF>
message.Write(new byte[]{(byte)'\r',(byte)'\n',(byte)'.',(byte)'\r',(byte)'\n'},0,5);
message.Seek(0,SeekOrigin.Begin);
// Start sending message to smtp server
m_pSocket.BeginSendData(message,callback,new SocketCallBack(this.OnDataMessageSendFinished));
}
}
else{
HandleSocketError(result,exception);
}
}
catch(Exception x){
// Pass exception to callback method
callback(SocketCallBackResult.Exception,x);
}
}
/// <summary>
/// Is called when smtp client has finished sending password to SMTP server.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnAuthLoginPasswordSendFinished(SocketCallBackResult result,
long count,
Exception exception,
object tag)
{
Auth_state_data stateData = (Auth_state_data) tag;
try
{
if (result == SocketCallBackResult.Ok)
{
MemoryStream ms = new MemoryStream();
stateData.Tag = ms;
m_pSocket.BeginReadLine(ms, 1000, stateData, OnAuthLoginPwdReadServerResponseFinished);
}
else
{
HandleSocketError(result, exception);
}
}
catch (Exception x)
{
// Pass exception to callback method
stateData.Callback(SocketCallBackResult.Exception, x);
}
}
/// <summary>
/// Handles socket errors.
/// </summary>
/// <param name="result"></param>
/// <param name="x"></param>
private void HandleSocketError(SocketCallBackResult result,Exception x)
{
if(result == SocketCallBackResult.Exception){
throw x;
}
else{
throw new Exception(result.ToString());
}
}
/// <summary>
/// Is called when smtp client has finished RCPT TO: command sending.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnRcptSendFinished(SocketCallBackResult result,
long count,
Exception exception,
object tag)
{
CommadCompleted callback = (CommadCompleted) tag;
try
{
if (result == SocketCallBackResult.Ok)
{
MemoryStream ms = new MemoryStream();
m_pSocket.BeginReadLine(ms,
1000,
new object[] {callback, ms},
OnRcptReadServerResponseFinished);
}
else
{
HandleSocketError(result, exception);
}
}
catch (Exception x)
{
// Pass exception to callback method
callback(SocketCallBackResult.Exception, x);
}
}
/// <summary>
/// Is called when smtp client has finished AUTH CRAM-MD5 command sending.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnAuthCramMd5SendFinished(SocketCallBackResult result,long count,Exception exception,object tag)
{
CommadCompleted callback = (CommadCompleted)(((object[])tag)[2]);
try{
if(result == SocketCallBackResult.Ok){
MemoryStream ms = new MemoryStream();
m_pSocket.BeginReadLine(ms,1000,new object[]{(((object[])tag)[0]),(((object[])tag)[1]),callback,ms},new SocketCallBack(this.OnAuthCramMd5ReadServerResponseFinished));
}
else{
HandleSocketError(result,exception);
}
}
catch(Exception x){
// Pass exception to callback method
callback(SocketCallBackResult.Exception,x);
}
}
/// <summary>
/// Is called when smtp client has finished DATA command sending.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnDataSendFinished(SocketCallBackResult result,
long count,
Exception exception,
object tag)
{
CommadCompleted callback = (CommadCompleted) (((object[]) tag)[1]);
try
{
if (result == SocketCallBackResult.Ok)
{
// DATA command has sent to SMTP server, start reading server response.
MemoryStream ms = new MemoryStream();
m_pSocket.BeginReadLine(ms,
1000,
new object[] {(((object[]) tag)[0]), callback, ms},
OnDataReadServerResponseFinished);
}
else
{
HandleSocketError(result, exception);
}
}
catch (Exception x)
{
// Pass exception to callback method
callback(SocketCallBackResult.Exception, x);
}
}
/// <summary>
/// Is called when smtp client has finished reading AUTH CRAM-MD% server response line.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnAuthCramMd5ReadServerResponseFinished(SocketCallBackResult result,long count,Exception exception,object tag)
{
CommadCompleted callback = (CommadCompleted)(((object[])tag)[2]);
try{
if(result == SocketCallBackResult.Ok){
string responseLine = System.Text.Encoding.ASCII.GetString(((MemoryStream)(((object[])tag)[3])).ToArray());
// Response line must start with 334 or otherwise it's error response
if(!responseLine.StartsWith("334")){
throw new Exception(responseLine);
}
else{
string md5HashKey = System.Text.Encoding.ASCII.GetString(Convert.FromBase64String(responseLine.Split(' ')[1]));
string userName = (string)(((object[])tag)[0]);
string password = (string)(((object[])tag)[1]);
HMACMD5 kMd5 = new HMACMD5(System.Text.Encoding.ASCII.GetBytes(password));
byte[] md5HashByte = kMd5.ComputeHash(System.Text.Encoding.ASCII.GetBytes(md5HashKey));
string hashedPwd = BitConverter.ToString(md5HashByte).ToLower().Replace("-","");
// Start sending user name to server
m_pSocket.BeginSendLine(Convert.ToBase64String(System.Text.Encoding.ASCII.GetBytes(userName + " " + hashedPwd)),callback,new SocketCallBack(this.OnAuthCramMd5UserPwdSendFinished));
}
}
else{
HandleSocketError(result,exception);
}
}
catch(Exception x){
// Pass exception to callback method
callback(SocketCallBackResult.Exception,x);
}
}
/// <summary>
/// Is called when smtp client has sending MESSAGE to smtp server.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnDataMessageSendFinished(SocketCallBackResult result,
long count,
Exception exception,
object tag)
{
CommadCompleted callback = (CommadCompleted) tag;
try
{
if (result == SocketCallBackResult.Ok)
{
// Message has successfully sent to smtp server, start reading server response
MemoryStream ms = new MemoryStream();
m_pSocket.BeginReadLine(ms,
1000,
new object[] {callback, ms},
OnDataMessageSendReadServerResponseFinished);
}
else
{
HandleSocketError(result, exception);
}
}
catch (Exception x)
{
// Pass exception to callback method
callback(SocketCallBackResult.Exception, x);
}
}
/// <summary>
/// Is called when smtp client has finished reading user name and password send server response line.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnAuthCramMd5UserPwdReadServerResponseFinished(SocketCallBackResult result,long count,Exception exception,object tag)
{
CommadCompleted callback = (CommadCompleted)(((object[])tag)[0]);
try{
if(result == SocketCallBackResult.Ok){
string responseLine = System.Text.Encoding.ASCII.GetString(((MemoryStream)(((object[])tag)[1])).ToArray());
// Response line must start with 235 or otherwise it's error response
if(!responseLine.StartsWith("235")){
throw new Exception(responseLine);
}
else{
// AUTH CRAM-MD5 completed susscessfully, call callback method.
callback(SocketCallBackResult.Ok,null);
}
}
else{
HandleSocketError(result,exception);
}
}
catch(Exception x){
// Pass exception to callback method
callback(SocketCallBackResult.Exception,x);
}
}
/// <summary>
/// Handles socket errors.
/// </summary>
/// <param name="result"></param>
/// <param name="x"></param>
private void HandleSocketError(SocketCallBackResult result, Exception x)
{
// Log socket errors to log
if (m_pSocket.Logger != null)
{
if (result == SocketCallBackResult.SocketClosed)
{
m_pSocket.Logger.AddTextEntry("Server closed socket !");
}
else if (x != null && x is SocketException)
{
SocketException socketException = (SocketException) x;
// Server disconnected or aborted connection
if (socketException.ErrorCode == 10054 || socketException.ErrorCode == 10053)
{
m_pSocket.Logger.AddTextEntry("Server closed socket or aborted connection !");
}
}
else
{
m_pSocket.Logger.AddTextEntry("Unknown error !");
}
}
if (result == SocketCallBackResult.Exception)
{
throw x;
}
else
{
throw new Exception(result.ToString());
}
}
/// <summary>
/// Is called when smtp client has finished reading MAIL FROM: command server response line.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnAuthLoginReadServerResponseFinished(SocketCallBackResult result,long count,Exception exception,object tag)
{
CommadCompleted callback = (CommadCompleted)(((object[])tag)[2]);
try{
if(result == SocketCallBackResult.Ok){
string responseLine = System.Text.Encoding.ASCII.GetString(((MemoryStream)(((object[])tag)[3])).ToArray());
// Response line must start with 334 or otherwise it's error response
if(!responseLine.StartsWith("334")){
throw new Exception(responseLine);
}
else{
string userName = (string)(((object[])tag)[0]);
// Start sending user name to server
m_pSocket.BeginSendLine(Convert.ToBase64String(System.Text.Encoding.ASCII.GetBytes(userName)),new object[]{(((object[])tag)[1]),callback},new SocketCallBack(this.OnAuthLoginUserSendFinished));
}
}
else{
HandleSocketError(result,exception);
}
}
catch(Exception x){
// Pass exception to callback method
callback(SocketCallBackResult.Exception,x);
}
}
/// <summary>
/// Is called when DATA command is finnished.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void EndDataCmd(SocketCallBackResult result,long count,Exception exception,object tag)
{
try{
switch(result)
{
case SocketCallBackResult.Ok:
// Notify Message stream owner that message storing completed ok.
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","OK"),new SocketCallBack(this.EndSend));
}
break;
case SocketCallBackResult.LengthExceeded:
// We must call that method to notify Message stream owner to close/dispose that stream.
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));
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();
break;
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);
break;
}
/* 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();
}
catch(Exception x){
OnError(x);
}
}
/// <summary>
/// Is called when smtp client has finished reading EHLO command server response line.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnEhloReadServerResponseFinished(SocketCallBackResult result,
long count,
Exception exception,
object tag)
{
CommadCompleted callback = (CommadCompleted) (((object[]) tag)[1]);
try
{
if (result == SocketCallBackResult.Ok)
{
string responseLine =
Encoding.ASCII.GetString(((MemoryStream) (((object[]) tag)[2])).ToArray());
/* RFC 2821 4.1.1.1 EHLO
* Examples:
* 250-domain<SP>free_text<CRLF>
* 250-EHLO_keyword<CRLF>
* 250<SP>EHLO_keyword<CRLF>
*
* 250<SP> specifies that last EHLO response line.
*/
// Response line must start with 250 or otherwise it's error response
if (!responseLine.StartsWith("250"))
{
// Server isn't required to support EHLO, try HELO
string hostName = (string) (((object[]) tag)[0]);
m_pSocket.BeginWriteLine("HELO " + hostName, callback, OnHeloSendFinished);
}
else
{
//---- Store supported ESMTP features --------------------//
if (responseLine.ToLower().IndexOf("size") > -1)
{
m_Supports_Size = true;
}
else if (responseLine.ToLower().IndexOf("chunking") > -1)
{
m_Supports_Bdat = true;
}
else if (responseLine.ToLower().IndexOf("cram-md5") > -1)
{
m_Supports_CramMd5 = true;
}
else if (responseLine.ToLower().IndexOf("login") > -1)
{
m_Supports_Login = true;
}
//--------------------------------------------------------//
// This isn't last EHLO response line
if (!responseLine.StartsWith("250 "))
{
MemoryStream ms = new MemoryStream();
m_pSocket.BeginReadLine(ms,
1000,
new[] {(((object[]) tag)[0]), callback, ms},
OnEhloReadServerResponseFinished);
}
else
{
// EHLO completed susscessfully, call callback method.
callback(SocketCallBackResult.Ok, null);
}
}
}
else
{
HandleSocketError(result, exception);
}
}
catch (Exception x)
{
// Pass exception to callback method
callback(SocketCallBackResult.Exception, x);
}
}
/// <summary>
/// Is called when asynchronous send completes.
/// </summary>
/// <param name="result">If true, then send was successfull.</param>
/// <param name="count">Count sended.</param>
/// <param name="exception">Exception happend on send. NOTE: available only is result=false.</param>
/// <param name="tag">User data.</param>
private void EndSend(SocketCallBackResult result,long count,Exception exception,object tag)
{
try{
switch(result)
{
case SocketCallBackResult.Ok:
BeginRecieveCmd();
break;
case SocketCallBackResult.SocketClosed:
EndSession();
break;
case SocketCallBackResult.Exception:
OnError(exception);
break;
}
}
catch(Exception x){
OnError(x);
}
}
/// <summary>
/// Is called when smtp client has finished reading EHLO command server response line.
/// </summary>
/// <param name="result"></param>
/// <param name="count"></param>
/// <param name="exception"></param>
/// <param name="tag"></param>
private void OnHeloReadServerResponseFinished(SocketCallBackResult result,
long count,
Exception exception,
object tag)
{
CommadCompleted callback = (CommadCompleted) (((object[]) tag)[0]);
try
{
if (result == SocketCallBackResult.Ok)
{
string responseLine =
Encoding.ASCII.GetString(((MemoryStream) (((object[]) tag)[1])).ToArray());
/* RFC 2821 4.1.1.1 HELO
* Examples:
* 250<SP>domain<SP>free_text<CRLF>
*
*/
// Response line must start with 250 or otherwise it's error response
if (!responseLine.StartsWith("250"))
{
throw new Exception(responseLine);
}
else
{
// EHLO completed susscessfully, call callback method.
callback(SocketCallBackResult.Ok, null);
}
}
else
{
HandleSocketError(result, exception);
}
}
catch (Exception x)
{
// Pass exception to callback method
callback(SocketCallBackResult.Exception, x);
}
}
