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         /*
  54      * If $_SERVER['HTTP_HOST'] is set, use that in our HELO to the SMTP
  55          * server.  This should fix the DNS issues some people have had
  56      */
  57         if (sqgetGlobalVar('HTTP_HOST', $HTTP_HOST, SQ_SERVER)) { // HTTP_HOST is set
  58         // optionally trim off port number
  59         if($p = strrpos($HTTP_HOST, ':')) {
  60             $HTTP_HOST = substr($HTTP_HOST, 0, $p);
  61         }
  62                 $helohost = $HTTP_HOST;
  63         } else { // For some reason, HTTP_HOST is not set - revert to old behavior
  64                 $helohost = $domain;
  65         }
  66
  67         /* Lets introduce ourselves */
  68         if (( $smtp_auth_mech == 'cram-md5') or ( $smtp_auth_mech == 'digest-md5' )) {
  69           // Doing some form of non-plain auth
  70           fputs($stream, "EHLO $helohost\r\n");
  71           $tmp = fgets($stream,1024);
  72           if ($this->errorCheck($tmp,$stream)) {
  73             return(0);
  74           }
  75           if ($smtp_auth_mech == 'cram-md5') {
  76             fputs($stream, "AUTH CRAM-MD5\r\n");
  77           } elseif ($smtp_auth_mech == 'digest-md5') {
  78             fputs($stream, "AUTH DIGEST-MD5\r\n");
  79           }
  80
  81           $tmp = fgets($stream,1024);
  82
  83           if ($this->errorCheck($tmp,$stream)) {
  84             return(0);
  85           }
  86
  87       // At this point, $tmp should hold "334 <challenge string>"
  88           $chall = substr($tmp,4);
  89           // Depending on mechanism, generate response string
  90           if ($smtp_auth_mech == 'cram-md5') {
  91             $response = cram_md5_response($username,$pass,$chall);
  92           } elseif ($smtp_auth_mech == 'digest-md5') {
  93             $response = digest_md5_response($username,$pass,$chall,'smtp',$host);
  94           }
  95           fputs($stream, $response);
  96
  97           // Let's see what the server had to say about that
  98           $tmp = fgets($stream,1024);
  99           if ($this->errorCheck($tmp,$stream)) {
 100             return(0);
 101           }
 102
 103           // CRAM-MD5 is done at this point.  If DIGEST-MD5, there's a bit more to go
 104           if ($smtp_auth_mech == 'digest-md5')
 105           {
 106             // $tmp contains rspauth, but I don't store that yet. (No need yet)
 107                 fputs($stream,"\r\n");
 108                 $tmp = fgets($stream,1024);
 109
 110                 if ($this->errorCheck($tmp,$stream)) {
 111                   return(0);
 112                 }
 113           }
 114     // CRAM-MD5 and DIGEST-MD5 code ends here
 115         } elseif ($smtp_auth_mech == 'none') {
 116           // No auth at all, just send helo and then send the mail
 117           fputs($stream, "HELO $helohost\r\n");
 118       $tmp = fgets($stream, 1024);
 119           if ($this->errorCheck($tmp, $stream)) {
 120         return(0);
 121           }
 122         } elseif ($smtp_auth_mech == 'login') {
 123           // The LOGIN method
 124       fputs($stream, "EHLO $helohost\r\n");
 125       $tmp = fgets($stream, 1024);
 126           if ($this->errorCheck($tmp, $stream)) {
 127         return(0);
 128           }
 129       fputs($stream, "AUTH LOGIN\r\n");
 130       $tmp = fgets($stream, 1024);
 131
 132           if ($this->errorCheck($tmp, $stream)) {
 133         return(0);
 134           }
 135       fputs($stream, base64_encode ($username) . "\r\n");
 136       $tmp = fgets($stream, 1024);
 137           if ($this->errorCheck($tmp, $stream)) {
 138         return(0);
 139           }
 140
 141       fputs($stream, base64_encode($pass) . "\r\n");
 142       $tmp = fgets($stream, 1024);
 143           if ($this->errorCheck($tmp, $stream)) {
 144         return(0);
 145           }
 146         } else {
 147                 /* Right here, they've reached an unsupported auth mechanism.
 148                    This is the ugliest hack I've ever done, but it'll do till I can fix
 149                    things up better tomorrow.  So tired... */
 150                 if ($this->errorCheck("535 Unable to use this auth type",$stream)) {
 151                         return(0);
 152                 }
 153     }
 154
 155         /* Ok, who is sending the message? */
 156         fputs($stream, 'MAIL FROM:<'.$from->mailbox.'@'.$from->host.">\r\n");
 157         $tmp = fgets($stream, 1024);
 158         if ($this->errorCheck($tmp, $stream)) {
 159             return(0);
 160         }
 161
 162         /* send who the recipients are */
 163         for ($i = 0, $cnt = count($to); $i < $cnt; $i++) {
 164             if (!$to[$i]->host) $to[$i]->host = $domain;
 165             if ($to[$i]->mailbox) {
 166                 fputs($stream, 'RCPT TO:<'.$to[$i]->mailbox.'@'.$to[$i]->host.">\r\n");
 167                 $tmp = fgets($stream, 1024);
 168                 if ($this->errorCheck($tmp, $stream)) {
 169                     return(0);
 170                 }
 171             }
 172         }
 173
 174         for ($i = 0, $cnt = count($cc); $i < $cnt; $i++) {
 175             if (!$cc[$i]->host) $cc[$i]->host = $domain;
 176             if ($cc[$i]->mailbox) {
 177                 fputs($stream, 'RCPT TO:<'.$cc[$i]->mailbox.'@'.$cc[$i]->host.">\r\n");
 178                 $tmp = fgets($stream, 1024);
 179                 if ($this->errorCheck($tmp, $stream)) {
 180                     return(0);
 181                 }
 182             }
 183         }
 184
 185         for ($i = 0, $cnt = count($bcc); $i < $cnt; $i++) {
 186             if (!$bcc[$i]->host) $bcc[$i]->host = $domain;
 187             if ($bcc[$i]->mailbox) {
 188                 fputs($stream, 'RCPT TO:<'.$bcc[$i]->mailbox.'@'.$bcc[$i]->host.">\r\n");
 189                 $tmp = fgets($stream, 1024);
 190                 if ($this->errorCheck($tmp, $stream)) {
 191                     return(0);
 192                 }
 193             }
 194         }
 195         /* Lets start sending the actual message */
 196         fputs($stream, "DATA\r\n");
 197         $tmp = fgets($stream, 1024);
 198         if ($this->errorCheck($tmp, $stream)) {
 199             return(0);
 200         }
 201         return $stream;
 202     }
 203
 204     function finalizeStream($stream) {
 205         fputs($stream, ".\r\n"); /* end the DATA part */
 206         $tmp = fgets($stream, 1024);
 207         $this->errorCheck($tmp, $stream);
 208         if ($this->dlv_ret_nr != 250) {
 209             return(0);
 210         }
 211         fputs($stream, "QUIT\r\n"); /* log off */
 212         fclose($stream);
 213         return true;
 214     }
 215
 216     /* check if an SMTP reply is an error and set an error message) */
 217     function errorCheck($line, $smtpConnection) {
 218
 219         $err_num = substr($line, 0, 3);
 220         $this->dlv_ret_nr = $err_num;
 221         $server_msg = substr($line, 4);
 222
 223         while(substr($line, 0, 4) == ($err_num.'-')) {
 224             $line = fgets($smtpConnection, 1024);
 225             $server_msg .= substr($line, 4);
 226         }
 227
 228         if ( ((int) $err_num{0}) < 4)
 229         {
 230                 return false;
 231         }
 232
 233         switch ($err_num) {
 234         case '421': $message = _("Service not available, closing channel");
 235             break;
 236         case '432': $message = _("A password transition is needed");
 237             break;
 238         case '450': $message = _("Requested mail action not taken: mailbox unavailable");
 239             break;
 240         case '451': $message = _("Requested action aborted: error in processing");
 241             break;
 242         case '452': $message = _("Requested action not taken: insufficient system storage");
 243             break;
 244         case '454': $message = _("Temporary authentication failure");
 245             break;
 246         case '500': $message = _("Syntax error; command not recognized");
 247             break;
 248         case '501': $message = _("Syntax error in parameters or arguments");
 249             break;
 250         case '502': $message = _("Command not implemented");
 251             break;
 252         case '503': $message = _("Bad sequence of commands");
 253             break;
 254         case '504': $message = _("Command parameter not implemented");
 255             break;
 256         case '530': $message = _("Authentication required");
 257             break;
 258         case '534': $message = _("Authentication mechanism is too weak");
 259             break;
 260         case '535': $message = _("Authentication failed");
 261             break;
 262         case '538': $message = _("Encryption required for requested authentication mechanism");
 263             break;
 264         case '550': $message = _("Requested action not taken: mailbox unavailable");
 265             break;
 266         case '551': $message = _("User not local; please try forwarding");
 267             break;
 268         case '552': $message = _("Requested mail action aborted: exceeding storage allocation");
 269             break;
 270         case '553': $message = _("Requested action not taken: mailbox name not allowed");
 271             break;
 272         case '554': $message = _("Transaction failed");
 273             break;
 274         default:    $message = _("Unknown response");
 275             break;
 276         }
 277
 278         $this->dlv_msg = $message;
 279         $this->dlv_server_msg = nl2br(htmlspecialchars($server_msg));
 280
 281         return true;
 282     }
 283
 284     function authPop($pop_server='', $pop_port='', $user, $pass) {
 285         if (!$pop_port) {
 286             $pop_port = 110;
 287         }
 288         if (!$pop_server) {
 289             $pop_server = 'localhost';
 290         }
 291         $popConnection = fsockopen($pop_server, $pop_port, $err_no, $err_str);
 292         if (!$popConnection) {
 293             error_log("Error connecting to POP Server ($pop_server:$pop_port)"
 294                   . " $err_no : $err_str");
 295         } else {
 296             $tmp = fgets($popConnection, 1024); /* banner */
 297             if (substr($tmp, 0, 3) != '+OK') {
 298                 return(0);
 299             }
 300             fputs($popConnection, "USER $user\r\n");
 301             $tmp = fgets($popConnection, 1024);
 302             if (substr($tmp, 0, 3) != '+OK') {
 303                 return(0);
 304             }
 305             fputs($popConnection, 'PASS ' . $pass . "\r\n");
 306             $tmp = fgets($popConnection, 1024);
 307             if (substr($tmp, 0, 3) != '+OK') {
 308                 return(0);
 309             }
 310             fputs($popConnection, "QUIT\r\n"); /* log off */
 311             fclose($popConnection);
 312         }
 313     }
 314 }
 315
 316 ?>