internal void GetConnection(ServicePoint servicePoint)
        {
            if (this.isConnected)
            {
                throw new InvalidOperationException(SR.GetString("SmtpAlreadyConnected"));
            }
            if (Logging.On)
            {
                Logging.Associate(Logging.Web, this, servicePoint);
            }
            this.connectionPool = ConnectionPoolManager.GetConnectionPool(servicePoint, "", m_CreateConnectionCallback);
            PooledStream pooledStream = this.connectionPool.GetConnection(this, null, this.Timeout);

            while ((((SmtpPooledStream)pooledStream).creds != null) && (((SmtpPooledStream)pooledStream).creds != this.credentials))
            {
                this.connectionPool.PutConnection(pooledStream, pooledStream.Owner, this.Timeout, false);
                pooledStream = this.connectionPool.GetConnection(this, null, this.Timeout);
            }
            if (Logging.On)
            {
                Logging.Associate(Logging.Web, this, pooledStream);
            }
            lock (this)
            {
                this.pooledStream = pooledStream;
            }
            ((SmtpPooledStream)pooledStream).creds = this.credentials;
            this.responseReader = new SmtpReplyReaderFactory(pooledStream.NetworkStream);
            pooledStream.UpdateLifetime();
            if (((SmtpPooledStream)pooledStream).previouslyUsed)
            {
                this.isConnected = true;
            }
            else
            {
                LineInfo info = this.responseReader.GetNextReplyReader().ReadLine();
                if (info.StatusCode != SmtpStatusCode.ServiceReady)
                {
                    throw new SmtpException(info.StatusCode, info.Line, true);
                }
                try
                {
                    this.extensions = EHelloCommand.Send(this, this.client.clientDomain);
                    this.ParseExtensions(this.extensions);
                }
                catch (SmtpException exception)
                {
                    if ((exception.StatusCode != SmtpStatusCode.CommandUnrecognized) && (exception.StatusCode != SmtpStatusCode.CommandNotImplemented))
                    {
                        throw exception;
                    }
                    HelloCommand.Send(this, this.client.clientDomain);
                    this.supportedAuth = SupportedAuth.Login;
                }
                if (this.enableSsl)
                {
                    if (!this.serverSupportsStartTls && !(pooledStream.NetworkStream is TlsStream))
                    {
                        throw new SmtpException(SR.GetString("MailServerDoesNotSupportStartTls"));
                    }
                    StartTlsCommand.Send(this);
                    TlsStream stream2 = new TlsStream(servicePoint.Host, pooledStream.NetworkStream, this.clientCertificates, servicePoint, this.client, null);
                    pooledStream.NetworkStream = stream2;
                    this.channelBindingToken   = stream2.GetChannelBinding(ChannelBindingKind.Unique);
                    this.responseReader        = new SmtpReplyReaderFactory(pooledStream.NetworkStream);
                    this.extensions            = EHelloCommand.Send(this, this.client.clientDomain);
                    this.ParseExtensions(this.extensions);
                }
                if (this.credentials != null)
                {
                    for (int i = 0; i < this.authenticationModules.Length; i++)
                    {
                        Authorization authorization;
                        if (this.AuthSupported(this.authenticationModules[i]))
                        {
                            NetworkCredential credential = this.credentials.GetCredential(servicePoint.Host, servicePoint.Port, this.authenticationModules[i].AuthenticationType);
                            if (credential != null)
                            {
                                authorization = this.SetContextAndTryAuthenticate(this.authenticationModules[i], credential, null);
                                if ((authorization != null) && (authorization.Message != null))
                                {
                                    info = AuthCommand.Send(this, this.authenticationModules[i].AuthenticationType, authorization.Message);
                                    if (info.StatusCode != SmtpStatusCode.CommandParameterNotImplemented)
                                    {
                                        goto Label_0363;
                                    }
                                }
                            }
                        }
                        continue;
Label_02F2:
                        authorization = this.authenticationModules[i].Authenticate(info.Line, null, this, this.client.TargetName, this.channelBindingToken);
                        if (authorization == null)
                        {
                            throw new SmtpException(SR.GetString("SmtpAuthenticationFailed"));
                        }
                        info = AuthCommand.Send(this, authorization.Message);
                        if (info.StatusCode == ((SmtpStatusCode)0xeb))
                        {
                            this.authenticationModules[i].CloseContext(this);
                            this.isConnected = true;
                            return;
                        }
Label_0363:
                        if (info.StatusCode == ((SmtpStatusCode)0x14e))
                        {
                            goto Label_02F2;
                        }
                    }
                }
                this.isConnected = true;
            }
        }
Esempio n. 2
0
        internal void GetConnection(ServicePoint servicePoint)
        {
            if (isConnected)
            {
                throw new InvalidOperationException(SR.GetString(SR.SmtpAlreadyConnected));
            }

            if (Logging.On)
            {
                Logging.Associate(Logging.Web, this, servicePoint);
            }
            Debug.Assert(servicePoint != null, "servicePoint was null from SmtpTransport");
            connectionPool = ConnectionPoolManager.GetConnectionPool(servicePoint, "", m_CreateConnectionCallback);

            PooledStream pooledStream = connectionPool.GetConnection((object)this, null, Timeout);

            while (((SmtpPooledStream)pooledStream).creds != null && ((SmtpPooledStream)pooledStream).creds != credentials)
            {
                // destroy this connection so that a new connection can be created
                // in order to use the proper credentials.  Do not just close the
                // connection since it's in a state where a QUIT could be sent
                connectionPool.PutConnection(pooledStream, pooledStream.Owner, Timeout, false);
                pooledStream = connectionPool.GetConnection((object)this, null, Timeout);
            }
            if (Logging.On)
            {
                Logging.Associate(Logging.Web, this, pooledStream);
            }

            lock (this) {
                this.pooledStream = pooledStream;
            }

            ((SmtpPooledStream)pooledStream).creds = credentials;

            responseReader = new SmtpReplyReaderFactory(pooledStream.NetworkStream);

            //set connectionlease
            pooledStream.UpdateLifetime();

            //if the stream was already used, then we've already done the handshake
            if (((SmtpPooledStream)pooledStream).previouslyUsed == true)
            {
                isConnected = true;
                return;
            }

            LineInfo info = responseReader.GetNextReplyReader().ReadLine();

            switch (info.StatusCode)
            {
            case SmtpStatusCode.ServiceReady:
            {
                break;
            }

            default:
            {
                throw new SmtpException(info.StatusCode, info.Line, true);
            }
            }

            try
            {
                extensions = EHelloCommand.Send(this, client.clientDomain);
                ParseExtensions(extensions);
            }
            catch (SmtpException e)
            {
                if ((e.StatusCode != SmtpStatusCode.CommandUnrecognized) &&
                    (e.StatusCode != SmtpStatusCode.CommandNotImplemented))
                {
                    throw e;
                }

                HelloCommand.Send(this, client.clientDomain);
                //if ehello isn't supported, assume basic login
                supportedAuth = SupportedAuth.Login;
            }

#if !FEATURE_PAL
            // Establish TLS
            if (enableSsl)
            {
                if (!serverSupportsStartTls)
                {
                    // Either TLS is already established or server does not support TLS
                    if (!(pooledStream.NetworkStream is TlsStream))
                    {
                        throw new SmtpException(SR.GetString(SR.MailServerDoesNotSupportStartTls));
                    }
                }
                StartTlsCommand.Send(this);
                TlsStream TlsStream = new TlsStream(servicePoint.Host, pooledStream.NetworkStream, clientCertificates, servicePoint, client, null);

                pooledStream.NetworkStream = TlsStream;

                //for SMTP, the CBT should be unique
                this.channelBindingToken = TlsStream.GetChannelBinding(ChannelBindingKind.Unique);

                responseReader = new SmtpReplyReaderFactory(pooledStream.NetworkStream);

                // According to RFC 3207: The client SHOULD send an EHLO command
                // as the first command after a successful TLS negotiation.
                extensions = EHelloCommand.Send(this, client.clientDomain);
                ParseExtensions(extensions);
            }
#endif // !FEATURE_PAL

            //if no credentials were supplied, try anonymous
            //servers don't appear to anounce that they support anonymous login.
            if (credentials != null)
            {
                for (int i = 0; i < authenticationModules.Length; i++)
                {
                    //only authenticate if the auth protocol is supported  - [....]
                    if (!AuthSupported(authenticationModules[i]))
                    {
                        continue;
                    }

                    NetworkCredential credential = credentials.GetCredential(servicePoint.Host,
                                                                             servicePoint.Port, authenticationModules[i].AuthenticationType);
                    if (credential == null)
                    {
                        continue;
                    }

                    Authorization auth = SetContextAndTryAuthenticate(authenticationModules[i], credential, null);

                    if (auth != null && auth.Message != null)
                    {
                        info = AuthCommand.Send(this, authenticationModules[i].AuthenticationType, auth.Message);

                        if (info.StatusCode == SmtpStatusCode.CommandParameterNotImplemented)
                        {
                            continue;
                        }

                        while ((int)info.StatusCode == 334)
                        {
                            auth = authenticationModules[i].Authenticate(info.Line, null, this, this.client.TargetName, this.channelBindingToken);
                            if (auth == null)
                            {
                                throw new SmtpException(SR.GetString(SR.SmtpAuthenticationFailed));
                            }
                            info = AuthCommand.Send(this, auth.Message);

                            if ((int)info.StatusCode == 235)
                            {
                                authenticationModules[i].CloseContext(this);
                                isConnected = true;
                                return;
                            }
                        }
                    }
                }
            }
            isConnected = true;
        }