class/deliver/Deliver_SMTP.class.php

   1 <?php
   2 /**
   3  * Deliver_SMTP.class.php
   4  *
   5  * Copyright (c) 1999-2003 The SquirrelMail Project Team
   6  * Licensed under the GNU GPL. For full terms see the file COPYING.
   7  *
   8  * Delivery backend for the Deliver class.
   9  *
  10  * $Id$
  11  */
  12
  13 require_once(SM_PATH . 'class/deliver/Deliver.class.php');
  14
  15 class Deliver_SMTP extends Deliver {
  16
  17     function preWriteToStream(&$s) {
  18        if ($s) {
  19           if ($s{0} == '.')   $s = '.' . $s;
  20           $s = str_replace("\n.","\n..",$s);
  21        }
  22     }
  23
  24     function initStream($message, $domain, $length=0, $host='', $port='', $user='', $pass='', $authpop=false) {
  25         global $use_smtp_tls,$smtp_auth_mech,$username,$key,$onetimepad;
  26
  27         if ($authpop) {
  28            $this->authPop($host, '', $username, $pass);
  29         }
  30
  31     $rfc822_header = $message->rfc822_header;
  32         $from = $rfc822_header->from[0];
  33         $to =   $rfc822_header->to;
  34         $cc =   $rfc822_header->cc;
  35         $bcc =  $rfc822_header->bcc;
  36
  37     if (($use_smtp_tls == true) and (check_php_version(4,3)) and (extension_loaded('openssl'))) {
  38           $stream = fsockopen('tls://' . $host, $port, $errorNumber, $errorString);
  39         } else {
  40           $stream = fsockopen($host, $port, $errorNumber, $errorString);
  41         }
  42
  43         if (!$stream) {
  44             $this->dlv_msg = $errorString;
  45             $this->dlv_ret_nr = $errorNumber;
  46             return(0);
  47         }
  48         $tmp = fgets($stream, 1024);
  49         if ($this->errorCheck($tmp, $stream)) {
  50             return(0);
  51         }
  52
  53         /* Lets introduce ourselves */
  54         if (( $smtp_auth_mech == 'cram-md5') or ( $smtp_auth_mech == 'digest-md5' )) {
  55           // Doing some form of non-plain auth
  56           fputs($stream, "EHLO $domain\r\n");
  57           $tmp = fgets($stream,1024);
  58           if ($this->errorCheck($tmp,$stream)) {
  59             return(0);
  60           }
  61           if ($smtp_auth_mech == 'cram-md5') {
  62             fputs($stream, "AUTH CRAM-MD5\r\n");
  63           } elseif ($smtp_auth_mech == 'digest-md5') {
  64             fputs($stream, "AUTH DIGEST-MD5\r\n");
  65           }
  66           $tmp = fgets($stream,1024);
  67
  68           if ($this->errorCheck($tmp,$stream)) {
  69             return(0);
  70           }
  71
  72       // At this point, $tmp should hold "334 <challenge string>"
  73           $chall = substr($tmp,4);
  74           // Depending on mechanism, generate response string
  75           if ($smtp_auth_mech == 'cram-md5') {
  76             $response = cram_md5_response($username,$pass,$chall);
  77           } elseif ($smtp_auth_mech == 'digest-md5') {
  78             $response = digest_md5_response($username,$pass,$chall,'smtp',$host);
  79           }
  80           fputs($stream, $response);
  81
  82           // Let's see what the server had to say about that
  83           $tmp = fgets($stream,1024);
  84           if ($this->errorCheck($tmp,$stream)) {
  85             return(0);
  86           }
  87
  88           // CRAM-MD5 is done at this point.  If DIGEST-MD5, there's a bit more to go
  89           if ($smtp_auth_mech == 'digest-md5')
  90           {
  91             // $tmp contains rspauth, but I don't store that yet. (No need yet)
  92                 fputs($stream,"\r\n");
  93                 $tmp = fgets($stream,1024);
  94
  95                 if ($this->errorCheck($tmp,$stream)) {
  96                   return(0);
  97                 }
  98           }
  99     // CRAM-MD5 and DIGEST-MD5 code ends here
 100         } elseif ($smtp_auth_mech == 'none') {
 101           // No auth at all, just send helo and then send the mail
 102           fputs($stream, "HELO $domain\r\n");
 103       $tmp = fgets($stream, 1024);
 104           if ($this->errorCheck($tmp, $stream)) {
 105         return(0);
 106           }
 107         } elseif ($smtp_auth_mech == 'login') {
 108           // The LOGIN method
 109       fputs($stream, "EHLO $domain\r\n");
 110       $tmp = fgets($stream, 1024);
 111           if ($this->errorCheck($tmp, $stream)) {
 112         return(0);
 113           }
 114       fputs($stream, "AUTH LOGIN\r\n");
 115       $tmp = fgets($stream, 1024);
 116
 117           if ($this->errorCheck($tmp, $stream)) {
 118         return(0);
 119           }
 120       fputs($stream, base64_encode ($username) . "\r\n");
 121       $tmp = fgets($stream, 1024);
 122           if ($this->errorCheck($tmp, $stream)) {
 123         return(0);
 124           }
 125
 126       fputs($stream, base64_encode($pass) . "\r\n");
 127       $tmp = fgets($stream, 1024);
 128           if ($this->errorCheck($tmp, $stream)) {
 129         return(0);
 130           }
 131         } else {
 132                 /* Right here, they've reached an unsupported auth mechanism.
 133                    This is the ugliest hack I've ever done, but it'll do till I can fix
 134                    things up better tomorrow.  So tired... */
 135                 if ($this->errorCheck("535 Unable to use this auth type",$stream)) {
 136                         return(0);
 137                 }
 138     }
 139
 140         /* Ok, who is sending the message? */
 141         fputs($stream, 'MAIL FROM: <'.$from->mailbox.'@'.$from->host.">\r\n");
 142         $tmp = fgets($stream, 1024);
 143         if ($this->errorCheck($tmp, $stream)) {
 144             return(0);
 145         }
 146
 147         /* send who the recipients are */
 148         for ($i = 0, $cnt = count($to); $i < $cnt; $i++) {
 149             if (!$to[$i]->host) $to[$i]->host = $domain;
 150             if ($to[$i]->mailbox) {
 151                 fputs($stream, 'RCPT TO: <'.$to[$i]->mailbox.'@'.$to[$i]->host.">\r\n");
 152                 $tmp = fgets($stream, 1024);
 153                 if ($this->errorCheck($tmp, $stream)) {
 154                     return(0);
 155                 }
 156             }
 157         }
 158
 159         for ($i = 0, $cnt = count($cc); $i < $cnt; $i++) {
 160             if (!$cc[$i]->host) $cc[$i]->host = $domain;
 161             if ($cc[$i]->mailbox) {
 162                 fputs($stream, 'RCPT TO: <'.$cc[$i]->mailbox.'@'.$cc[$i]->host.">\r\n");
 163                 $tmp = fgets($stream, 1024);
 164                 if ($this->errorCheck($tmp, $stream)) {
 165                     return(0);
 166                 }
 167             }
 168         }
 169         for ($i = 0, $cnt = count($bcc); $i < $cnt; $i++) {
 170             if (!$bcc[$i]->host) $bcc[$i]->host = $domain;
 171             if ($bcc[$i]->mailbox) {
 172                 fputs($stream, 'RCPT TO: <'.$bcc[$i]->mailbox.'@'.$bcc[$i]->host.">\r\n");
 173                 $tmp = fgets($stream, 1024);
 174                 if ($this->errorCheck($tmp, $stream)) {
 175                     return(0);
 176                 }
 177             }
 178         }
 179         /* Lets start sending the actual message */
 180         fputs($stream, "DATA\r\n");
 181         $tmp = fgets($stream, 1024);
 182         if ($this->errorCheck($tmp, $stream)) {
 183             return(0);
 184         }
 185         return $stream;
 186     }
 187
 188     function finalizeStream($stream) {
 189         fputs($stream, ".\r\n"); /* end the DATA part */
 190         $tmp = fgets($stream, 1024);
 191         $this->errorCheck($tmp, $stream);
 192         if ($this->dlv_ret_nr != 250) {
 193             return(0);
 194         }
 195         fputs($stream, "QUIT\r\n"); /* log off */
 196         fclose($stream);
 197         return true;
 198     }
 199
 200     /* check if an SMTP reply is an error and set an error message) */
 201     function errorCheck($line, $smtpConnection) {
 202
 203         $err_num = substr($line, 0, 3);
 204         $this->dlv_ret_nr = $err_num;
 205         $server_msg = substr($line, 4);
 206
 207         while(substr($line, 0, 4) == ($err_num.'-')) {
 208             $line = fgets($smtpConnection, 1024);
 209             $server_msg .= substr($line, 4);
 210         }
 211
 212         if ( ((int) $err_num{0}) < 4)
 213         {
 214                 return false;
 215         }
 216
 217         switch ($err_num) {
 218         case '421': $message = _("Service not available, closing channel");
 219             break;
 220         case '432': $message = _("A password transition is needed");
 221             break;
 222         case '450': $message = _("Requested mail action not taken: mailbox unavailable");
 223             break;
 224         case '451': $message = _("Requested action aborted: error in processing");
 225             break;
 226         case '452': $message = _("Requested action not taken: insufficient system storage");
 227             break;
 228         case '454': $message = _("Temporary authentication failure");
 229             break;
 230         case '500': $message = _("Syntax error; command not recognized");
 231             break;
 232         case '501': $message = _("Syntax error in parameters or arguments");
 233             break;
 234         case '502': $message = _("Command not implemented");
 235             break;
 236         case '503': $message = _("Bad sequence of commands");
 237             break;
 238         case '504': $message = _("Command parameter not implemented");
 239             break;
 240         case '530': $message = _("Authentication required");
 241             break;
 242         case '534': $message = _("Authentication mechanism is too weak");
 243             break;
 244         case '535': $message = _("Authentication failed");
 245             break;
 246         case '538': $message = _("Encryption required for requested authentication mechanism");
 247             break;
 248         case '550': $message = _("Requested action not taken: mailbox unavailable");
 249             break;
 250         case '551': $message = _("User not local; please try forwarding");
 251             break;
 252         case '552': $message = _("Requested mail action aborted: exceeding storage allocation");
 253             break;
 254         case '553': $message = _("Requested action not taken: mailbox name not allowed");
 255             break;
 256         case '554': $message = _("Transaction failed");
 257             break;
 258         default:    $message = _("Unknown response");
 259             break;
 260         }
 261
 262         $this->dlv_msg = $message;
 263         $this->dlv_server_msg = nl2br(htmlspecialchars($server_msg));
 264
 265         return true;
 266     }
 267
 268     function authPop($pop_server='', $pop_port='', $user, $pass) {
 269         if (!$pop_port) {
 270             $pop_port = 110;
 271         }
 272         if (!$pop_server) {
 273             $pop_server = 'localhost';
 274         }
 275         $popConnection = fsockopen($pop_server, $pop_port, $err_no, $err_str);
 276         if (!$popConnection) {
 277             error_log("Error connecting to POP Server ($pop_server:$pop_port)"
 278                   . " $err_no : $err_str");
 279         } else {
 280             $tmp = fgets($popConnection, 1024); /* banner */
 281             if (!eregi("^\+OK", $tmp, $regs)) {
 282                 return(0);
 283             }
 284             fputs($popConnection, "USER $user\r\n");
 285             $tmp = fgets($popConnection, 1024);
 286             if (!eregi("^\+OK", $tmp, $regs)) {
 287                 return(0);
 288             }
 289             fputs($popConnection, 'PASS ' . $pass . "\r\n");
 290             $tmp = fgets($popConnection, 1024);
 291             if (!eregi("^\+OK", $tmp, $regs)) {
 292                 return(0);
 293             }
 294             fputs($popConnection, "QUIT\r\n"); /* log off */
 295             fclose($popConnection);
 296         }
 297     }
 298 }
 299
 300 ?>