EmailSender.cpp

Go to the documentation of this file.

#include "NativeFeatureIncludes.h"
#if _RAKNET_SUPPORT_EmailSender==1

// Useful sites
// http://www.faqs.org\rfcs\rfc2821.html
// http://en.wikipedia.org/wiki/Base64
// http://www2.rad.com\networks/1995/mime/examples.htm

#include "EmailSender.h"
#include "TCPInterface.h"
#include "GetTime.h"
#include "Rand.h"
#include "FileList.h"
#include "BitStream.h"
#include <stdio.h>

#if defined(_XBOX) || defined(X360)
                            
#endif

#include "RakSleep.h"

static const char base64Map[]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

const char *EmailSender::Send(const char *hostAddress, unsigned short hostPort, const char *sender, const char *recipient, const char *senderName, const char *recipientName, const char *subject, const char *body, FileList *attachedFiles, bool doPrintf, const char *password)
{
        Packet *packet;
        char query[1024];
        TCPInterface tcpInterface;
        SystemAddress emailServer;
        if (tcpInterface.Start(0, 0)==false)
                return "Unknown error starting TCP";
        emailServer=tcpInterface.Connect(hostAddress, hostPort,true);
        if (emailServer==UNASSIGNED_SYSTEM_ADDRESS)
                return "Failed to connect to host";
#ifdef OPEN_SSL_CLIENT_SUPPORT
        tcpInterface.StartSSLClient(emailServer);
#endif
        RakNetTime timeoutTime = RakNet::GetTime()+3000;
        packet=0;
        while (RakNet::GetTime() < timeoutTime)
        {
                packet = tcpInterface.Receive();
                if (packet)
                {
                        if (doPrintf)
                                RAKNET_DEBUG_PRINTF("%s", packet->data);
                        break;
                }
                RakSleep(250);
        }

        if (packet==0)
                return "Timeout while waiting for initial data from server.";
        
        tcpInterface.Send("EHLO\r\n", 6, emailServer,false);
        const char *response;
        bool authenticate=false;
#ifdef _MSC_VER
#pragma warning(disable:4127)   // conditional expression is constant
#endif
        while (1)
        {
                response=GetResponse(&tcpInterface, emailServer, doPrintf);

                if (response!=0 && strcmp(response, "AUTHENTICATE")==0)
                {
                        authenticate=true;
                        break;
                }

                // Something other than continue?
                if (response!=0 && strcmp(response, "CONTINUE")!=0)
                        return response;

                // Success?
                if (response==0)
                        break;
        }

        if (authenticate)
        {
                sprintf(query, "EHLO %s\r\n", sender);
                tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);
                response=GetResponse(&tcpInterface, emailServer, doPrintf);
                if (response!=0)
                        return response;
                if (password==0)
                        return "Password needed";
                char *outputData = RakNet::OP_NEW_ARRAY<char >((const int) (strlen(sender)+strlen(password)+2)*3, __FILE__, __LINE__ );
                RakNet::BitStream bs;
                char zero=0;
                bs.Write(&zero,1);
                bs.Write(sender,(const unsigned int)strlen(sender));
                //bs.Write("jms1@jms1.net",(const unsigned int)strlen("jms1@jms1.net"));
                bs.Write(&zero,1);
                bs.Write(password,(const unsigned int)strlen(password));
                bs.Write(&zero,1);
                //bs.Write("not.my.real.password",(const unsigned int)strlen("not.my.real.password"));
                Base64Encoding((const char*)bs.GetData(), bs.GetNumberOfBytesUsed(), outputData, base64Map);
                sprintf(query, "AUTH PLAIN %s", outputData);
                tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);
                response=GetResponse(&tcpInterface, emailServer, doPrintf);
                if (response!=0)
                        return response;
        }


        if (sender)
                sprintf(query, "MAIL From: <%s>\r\n", sender);
        else
                sprintf(query, "MAIL From: <>\r\n");
        tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);
        response=GetResponse(&tcpInterface, emailServer, doPrintf);
        if (response!=0)
                return response;

        if (recipient)
                sprintf(query, "RCPT TO: <%s>\r\n", recipient);
        else
                sprintf(query, "RCPT TO: <>\r\n");
        tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);
        response=GetResponse(&tcpInterface, emailServer, doPrintf);
        if (response!=0)
                return response;

        tcpInterface.Send("DATA\r\n", (unsigned int)strlen("DATA\r\n"), emailServer,false);

        // Wait for 354...

        response=GetResponse(&tcpInterface, emailServer, doPrintf);
        if (response!=0)
                return response;

        if (subject)
        {
                sprintf(query, "Subject: %s\r\n", subject);
                tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);
        }
        if (senderName)
        {
                sprintf(query, "From: %s\r\n", senderName);
                tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);
        }
        if (recipientName)
        {
                sprintf(query, "To: %s\r\n", recipientName);
                tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);
        }

        const int boundarySize=60;
        char boundary[boundarySize+1];
        int i,j;
        if (attachedFiles && attachedFiles->fileList.Size())
        {
                seedMT((unsigned int) RakNet::GetTime());
                // Random multipart message boundary
                for (i=0; i < boundarySize; i++)
                        boundary[i]=base64Map[randomMT()%64];
                boundary[boundarySize]=0;
        }

        sprintf(query, "MIME-version: 1.0\r\n");
        tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);

        if (attachedFiles && attachedFiles->fileList.Size())
        {
                sprintf(query, "Content-type: multipart/mixed; BOUNDARY=\"%s\"\r\n\r\n", boundary);
                tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);

                sprintf(query, "This is a multi-part message in MIME format.\r\n\r\n--%s\r\n", boundary);
                tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);
        }
        
        sprintf(query, "Content-Type: text/plain; charset=\"US-ASCII\"\r\n\r\n");
        tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);

        // Write the body of the email, doing some lame shitty shit where I have to make periods at the start of a newline have a second period.
        char *newBody;
        int bodyLength;
        bodyLength=(int)strlen(body);
        newBody = (char*) rakMalloc_Ex( bodyLength*3, __FILE__, __LINE__ );
        if (bodyLength>0)
                newBody[0]=body[0];
        for (i=1, j=1; i < bodyLength; i++)
        {
                // Transform \n . \r \n into \n . . \r \n
                if (i < bodyLength-2 &&
                        body[i-1]=='\n' &&
                        body[i+0]=='.' &&
                        body[i+1]=='\r' &&
                        body[i+2]=='\n')
                {
                        newBody[j++]='.';
                        newBody[j++]='.';
                        newBody[j++]='\r';
                        newBody[j++]='\n';
                        i+=2;
                }
                // Transform \n . . \r \n into \n . . . \r \n
                // Having to process .. is a bug in the mail server - the spec says ONLY \r\n.\r\n should be transformed
                else if (i <= bodyLength-3 &&
                        body[i-1]=='\n' &&
                        body[i+0]=='.' &&
                        body[i+1]=='.' &&
                        body[i+2]=='\r' &&
                        body[i+3]=='\n')
                {
                        newBody[j++]='.';
                        newBody[j++]='.';
                        newBody[j++]='.';
                        newBody[j++]='\r';
                        newBody[j++]='\n';
                        i+=3;
                }
                // Transform \n . \n into \n . . \r \n (this is a bug in the mail server - the spec says do not count \n alone but it does)
                else if (i < bodyLength-1 &&
                        body[i-1]=='\n' &&
                        body[i+0]=='.' &&
                        body[i+1]=='\n')
                {
                        newBody[j++]='.';
                        newBody[j++]='.';
                        newBody[j++]='\r';
                        newBody[j++]='\n';
                        i+=1;
                }
                // Transform \n . . \n into \n . . . \r \n (this is a bug in the mail server - the spec says do not count \n alone but it does)
                // In fact having to process .. is a bug too - because the spec says ONLY \r\n.\r\n should be transformed
                else if (i <= bodyLength-2 &&
                        body[i-1]=='\n' &&
                        body[i+0]=='.' &&
                        body[i+1]=='.' &&
                        body[i+2]=='\n')
                {
                        newBody[j++]='.';
                        newBody[j++]='.';
                        newBody[j++]='.';
                        newBody[j++]='\r';
                        newBody[j++]='\n';
                        i+=2;
                }
                else
                        newBody[j++]=body[i];
        }
        
        newBody[j++]='\r';
        newBody[j++]='\n';
        tcpInterface.Send(newBody, j, emailServer,false);

        rakFree_Ex(newBody, __FILE__, __LINE__ );
        int outputOffset;

        // What a pain in the rear.  I have to map the binary to printable characters using 6 bits per character.
        if (attachedFiles && attachedFiles->fileList.Size())
        {
                for (i=0; i < (int) attachedFiles->fileList.Size(); i++)
                {
                        // Write boundary
                        sprintf(query, "\r\n--%s\r\n", boundary);
                        tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);

                        sprintf(query, "Content-Type: APPLICATION/Octet-Stream; SizeOnDisk=%i; name=\"%s\"\r\nContent-Transfer-Encoding: BASE64\r\nContent-Description: %s\r\n\r\n", attachedFiles->fileList[i].dataLengthBytes, attachedFiles->fileList[i].filename.C_String(), attachedFiles->fileList[i].filename.C_String());
                        tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);

                        newBody = (char*) rakMalloc_Ex( (size_t) (attachedFiles->fileList[i].dataLengthBytes*3)/2, __FILE__, __LINE__ );

                        outputOffset=Base64Encoding(attachedFiles->fileList[i].data, (int) attachedFiles->fileList[i].dataLengthBytes, newBody, base64Map);

                        // Send the base64 mapped file.
                        tcpInterface.Send(newBody, outputOffset, emailServer,false);
                        rakFree_Ex(newBody, __FILE__, __LINE__ );

                }

                // Write last boundary
                sprintf(query, "\r\n--%s--\r\n", boundary);
                tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);
        }


        sprintf(query, "\r\n.\r\n");
        tcpInterface.Send(query, (unsigned int)strlen(query), emailServer,false);
        response=GetResponse(&tcpInterface, emailServer, doPrintf);
        if (response!=0)
                return response;

        tcpInterface.Send("QUIT\r\n", (unsigned int)strlen("QUIT\r\n"), emailServer,false);

        RakSleep(30);
        if (doPrintf)
        {
                packet = tcpInterface.Receive();
                while (packet)
                {
                        RAKNET_DEBUG_PRINTF("%s", packet->data);
                        packet = tcpInterface.Receive();
                }
        }
        tcpInterface.Stop();
        return 0; // Success
}

const char *EmailSender::GetResponse(TCPInterface *tcpInterface, const SystemAddress &emailServer, bool doPrintf)
{
        Packet *packet;
        RakNetTime timeout;
        timeout=RakNet::GetTime()+5000;
#ifdef _MSC_VER
        #pragma warning( disable : 4127 ) // warning C4127: conditional expression is constant
#endif
        while (1)
        {
                if (tcpInterface->HasLostConnection()==emailServer)
                        return "Connection to server lost.";
                packet = tcpInterface->Receive();
                if (packet)
                {
                        if (doPrintf)
                        {
                                RAKNET_DEBUG_PRINTF("%s", packet->data);
                        }
#if defined(OPEN_SSL_CLIENT_SUPPORT)
                        if (strstr((const char*)packet->data, "220"))
                        {
                                tcpInterface->StartSSLClient(packet->systemAddress);
                                return "AUTHENTICATE"; // OK
                        }
//                      if (strstr((const char*)packet->data, "250-AUTH LOGIN PLAIN"))
//                      {
//                              tcpInterface->StartSSLClient(packet->systemAddress);
//                              return "AUTHENTICATE"; // OK
//                      }
#endif
                        if (strstr((const char*)packet->data, "235"))
                                return 0; // Authentication accepted
                        if (strstr((const char*)packet->data, "354"))
                                return 0; // Go ahead
#if defined(OPEN_SSL_CLIENT_SUPPORT)
                        if (strstr((const char*)packet->data, "250-STARTTLS"))
                        {
                                tcpInterface->Send("STARTTLS\r\n", (unsigned int) strlen("STARTTLS\r\n"), packet->systemAddress, false);
                                return "CONTINUE";
                        }
#endif
                        if (strstr((const char*)packet->data, "250"))
                                return 0; // OK
                        if (strstr((const char*)packet->data, "550"))
                                return "Failed on error code 550";
                        if (strstr((const char*)packet->data, "553"))
                                return "Failed on error code 553";
                }
                if (RakNet::GetTime() > timeout)
                        return "Timed out";
                RakSleep(100);
        }
}

int EmailSender::Base64Encoding(const char *inputData, int dataLength, char *outputData, const char *base64Map)
{
        int outputOffset, charCount;
        int write3Count;
        outputOffset=0;
        charCount=0;
        int j;

        write3Count=dataLength/3;
        for (j=0; j < write3Count; j++)
        {
                // 6 leftmost bits from first byte, shifted to bits 7,8 are 0
                outputData[outputOffset++]=base64Map[inputData[j*3+0] >> 2];
                if ((++charCount % 76)==0) {outputData[outputOffset++]='\r'; outputData[outputOffset++]='\n'; charCount=0;}

                // Remaining 2 bits from first byte, placed in position, and 4 high bits from the second byte, masked to ignore bits 7,8
                outputData[outputOffset++]=base64Map[((inputData[j*3+0] << 4) | (inputData[j*3+1] >> 4)) & 63];
                if ((++charCount % 76)==0) {outputData[outputOffset++]='\r'; outputData[outputOffset++]='\n'; charCount=0;}

                // 4 low bits from the second byte and the two high bits from the third byte, masked to ignore bits 7,8
                outputData[outputOffset++]=base64Map[((inputData[j*3+1] << 2) | (inputData[j*3+2] >> 6)) & 63]; // Third 6 bits
                if ((++charCount % 76)==0) {outputData[outputOffset++]='\r'; outputData[outputOffset++]='\n'; charCount=0;}

                // Last 6 bits from the third byte, masked to ignore bits 7,8
                outputData[outputOffset++]=base64Map[inputData[j*3+2] & 63];
                if ((++charCount % 76)==0) {outputData[outputOffset++]='\r'; outputData[outputOffset++]='\n'; charCount=0;}
        }

        if (dataLength % 3==1)
        {
                // One input byte remaining
                outputData[outputOffset++]=base64Map[inputData[j*3+0] >> 2];
                if ((++charCount % 76)==0) {outputData[outputOffset++]='\r'; outputData[outputOffset++]='\n'; charCount=0;}

                // Remaining 2 bits from first byte, placed in position, and 4 high bits from the second byte, masked to ignore bits 7,8
                outputData[outputOffset++]=base64Map[((inputData[j*3+0] << 4) | (inputData[j*3+1] >> 4)) & 63];
                if ((++charCount % 76)==0) {outputData[outputOffset++]='\r'; outputData[outputOffset++]='\n'; charCount=0;}

                // Pad with two equals
                outputData[outputOffset++]='=';
                outputData[outputOffset++]='=';
        }
        else if (dataLength % 3==2)
        {
                // Two input bytes remaining

                // 6 leftmost bits from first byte, shifted to bits 7,8 are 0
                outputData[outputOffset++]=base64Map[inputData[j*3+0] >> 2];
                if ((++charCount % 76)==0) {outputData[outputOffset++]='\r'; outputData[outputOffset++]='\n'; charCount=0;}

                // Remaining 2 bits from first byte, placed in position, and 4 high bits from the second byte, masked to ignore bits 7,8
                outputData[outputOffset++]=base64Map[((inputData[j*3+0] << 4) | (inputData[j*3+1] >> 4)) & 63];
                if ((++charCount % 76)==0) {outputData[outputOffset++]='\r'; outputData[outputOffset++]='\n'; charCount=0;}

                // 4 low bits from the second byte, followed by 00
                outputData[outputOffset++]=base64Map[(inputData[j*3+1] << 2) & 63]; // Third 6 bits
                if ((++charCount % 76)==0) {outputData[outputOffset++]='\r'; outputData[outputOffset++]='\n'; charCount=0;}

                // Pad with one equal
                outputData[outputOffset++]='=';
                //outputData[outputOffset++]='=';
        }

        // Append \r\n
        outputData[outputOffset++]='\r';
        outputData[outputOffset++]='\n';
        outputData[outputOffset]=0;

        return outputOffset;
}

#endif // _RAKNET_SUPPORT_*