functions/smtp.php

   1 <?php
   2    /** smtp.php
   3     **
   4     ** This contains all the functions needed to send messages through
   5     ** an smtp server or sendmail.
   6     **/
   7
   8    $smtp_php = true;
   9
  10    // Returns true only if this message is multipart
  11    function isMultipart () {
  12       global $attachments;
  13
  14       if (count($attachments)>0)
  15          return true;
  16       else
  17          return false;
  18    }
  19
  20    // Attach the files that are due to be attached
  21    function attachFiles ($fp) {
  22       global $attachments, $attachment_dir;
  23
  24       $length = 0;
  25
  26       if (isMultipart()) {
  27          reset($attachments);
  28          while (list($localname, $remotename) = each($attachments)) {
  29             // This is to make sure noone is giving a filename in another
  30             // directory
  31             $localname = ereg_replace ("\\/", "", $localname);
  32
  33             $fileinfo = fopen ($attachment_dir.$localname.".info", "r");
  34             $filetype = fgets ($fileinfo, 8192);
  35             fclose ($fileinfo);
  36             $filetype = trim ($filetype);
  37             if ($filetype=="")
  38                $filetype = "application/octet-stream";
  39
  40             $header = "--".mimeBoundary()."\r\n";
  41             $header .= "Content-Type: $filetype\r\n";
  42             $header .= "Content-Disposition: attachment; filename=\"$remotename\"\r\n";
  43             $header .= "Content-Transfer-Encoding: base64\r\n\r\n";
  44             fputs ($fp, $header);
  45             $length += strlen($header);
  46
  47             $file = fopen ($attachment_dir.$localname, "r");
  48             while ($tmp = fread($file, 570)) {
  49                $encoded = chunk_split(base64_encode($tmp));
  50                $length += strlen($encoded);
  51                fputs ($fp, $encoded);
  52             }
  53             fclose ($file);
  54          }
  55       }
  56
  57       return $length;
  58    }
  59
  60    // Delete files that are uploaded for attaching
  61    function deleteAttachments() {
  62       global $attachments, $attachment_dir;
  63
  64       if (isMultipart()) {
  65          reset($attachments);
  66          while (list($localname, $remotename) = each($attachments)) {
  67             if (!ereg ("\\/", $localname)) {
  68                unlink ($attachment_dir.$localname);
  69                unlink ($attachment_dir.$localname.".info");
  70             }
  71          }
  72       }
  73    }
  74
  75    // Return a nice MIME-boundary
  76    function mimeBoundary () {
  77       static $mimeBoundaryString;
  78
  79       if ($mimeBoundaryString == "") {
  80          sq_mt_randomize(); // Initialize the random number generator
  81          // Use all allowed chars besides space.
  82          $Chrs = '\'()+,-./0123456789:=?ABCDEFGHIJKLMNOP' .
  83              'QRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz';
  84          // Create a LONG boundary to ensure no duplicates
  85          while (strlen($mimeBoundaryString) < 70) {
  86             $mimeBoundaryString .= $Chrs[mt_rand(0, strlen($Chrs))];
  87          }
  88       }
  89
  90       return $mimeBoundaryString;
  91    }
  92
  93    /* Time offset for correct timezone */
  94    function timezone () {
  95       $diff_second = date("Z");
  96       if ($diff_second > 0)
  97          $sign = "+";
  98       else
  99          $sign = "-";
 100
 101       $diff_second = abs($diff_second);
 102
 103       $diff_hour = floor ($diff_second / 3600);
 104       $diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
 105
 106       $zonename = "(".strftime("%Z").")";
 107       $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute, $zonename);
 108       return ($result);
 109    }
 110
 111    /* Print all the needed RFC822 headers */
 112    function write822Header ($fp, $t, $c, $b, $subject, $more_headers) {
 113       global $REMOTE_ADDR, $SERVER_NAME, $REMOTE_PORT;
 114       global $data_dir, $username, $domain, $version, $useSendmail;
 115       global $default_charset, $HTTP_VIA, $HTTP_X_FORWARDED_FOR;
 116       global $REMOTE_HOST;
 117
 118       // Storing the header to make sure the header is the same
 119       // everytime the header is printed.
 120       static $header, $headerlength;
 121
 122       if ($header == "") {
 123          $to = parseAddrs($t);
 124          $cc = parseAddrs($c);
 125          $bcc = parseAddrs($b);
 126          $reply_to = getPref($data_dir, $username, "reply_to");
 127          $from = getPref($data_dir, $username, "full_name");
 128          $from_addr = getPref($data_dir, $username, "email_address");
 129
 130          if ($from_addr == "")
 131             $from_addr = "$username@$domain";
 132
 133          $to_list = getLineOfAddrs($to);
 134          $cc_list = getLineOfAddrs($cc);
 135          $bcc_list = getLineOfAddrs($bcc);
 136
 137          /* Encoding 8-bit characters and making from line */
 138          $subject = sqStripSlashes(encodeHeader($subject));
 139          if ($from == "")
 140             $from = "<$from_addr>";
 141          else
 142             $from = "\"" . encodeHeader($from) . "\" <$from_addr>";
 143
 144          /* This creates an RFC 822 date */
 145          $date = date("D, j M Y H:i:s ", mktime()) . timezone();
 146
 147          /* Create a message-id */
 148          $message_id = "<" . $REMOTE_PORT . "." . $REMOTE_ADDR . ".";
 149          $message_id .= time() . ".squirrel@" . $SERVER_NAME .">";
 150
 151          /* Make an RFC822 Received: line */
 152          if (isset($REMOTE_HOST))
 153             $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
 154          else
 155             $received_from = $REMOTE_ADDR;
 156
 157          if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
 158             if ($HTTP_X_FORWARDED_FOR == "")
 159                $HTTP_X_FORWARDED_FOR = "unknown";
 160             $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
 161          }
 162
 163          $header  = "Received: from $received_from\r\n";
 164          $header .= "        (SquirrelMail authenticated user $username)\r\n";
 165          $header .= "        by $SERVER_NAME with HTTP;\r\n";
 166          $header .= "        $date\r\n";
 167
 168          /* Insert the rest of the header fields */
 169          $header .= "Message-ID: $message_id\r\n";
 170          $header .= "Date: $date\r\n";
 171          $header .= "Subject: $subject\r\n";
 172          $header .= "From: $from\r\n";
 173          $header .= "To: $to_list \r\n";    // Who it's TO
 174
 175          /* Insert headers from the $more_headers array */
 176          if(is_array($more_headers)) {
 177             reset($more_headers);
 178             while(list($h_name, $h_val) = each($more_headers)) {
 179                $header .= sprintf("%s: %s\r\n", $h_name, $h_val);
 180             }
 181          }
 182
 183          if ($cc_list) {
 184             $header .= "Cc: $cc_list\r\n"; // Who the CCs are
 185          }
 186
 187          if ($reply_to != "")
 188             $header .= "Reply-To: $reply_to\r\n";
 189
 190          if ($useSendmail) {
 191             if ($bcc_list) {
 192                // BCCs is removed from header by sendmail
 193                $header .= "Bcc: $bcc_list\r\n";
 194             }
 195          }
 196
 197          $header .= "X-Mailer: SquirrelMail (version $version)\r\n"; // Identify SquirrelMail
 198
 199          // Do the MIME-stuff
 200          $header .= "MIME-Version: 1.0\r\n";
 201
 202          if (isMultipart()) {
 203             $header .= "Content-Type: multipart/mixed; boundary=\"";
 204             $header .= mimeBoundary();
 205             $header .= "\"\r\n";
 206          } else {
 207             if ($default_charset != "")
 208                $header .= "Content-Type: text/plain; charset=$default_charset\r\n";
 209             else
 210                $header .= "Content-Type: text/plain;\r\n";
 211             $header .= "Content-Transfer-Encoding: 8bit\r\n";
 212          }
 213          $header .= "\r\n"; // One blank line to separate header and body
 214
 215          $headerlength = strlen($header);
 216       }
 217
 218       // Write the header
 219       fputs ($fp, $header);
 220
 221       return $headerlength;
 222    }
 223
 224    // Send the body
 225    function writeBody ($fp, $passedBody) {
 226       global $default_charset;
 227
 228       $attachmentlength = 0;
 229
 230       if (isMultipart()) {
 231          $body = "--".mimeBoundary()."\r\n";
 232
 233          if ($default_charset != "")
 234             $body .= "Content-Type: text/plain; charset=$default_charset\r\n";
 235          else
 236             $body .= "Content-Type: text/plain\r\n";
 237
 238          $body .= "Content-Transfer-Encoding: 8bit\r\n\r\n";
 239          $body .= sqStripSlashes($passedBody) . "\r\n";
 240          fputs ($fp, $body);
 241
 242          $attachmentlength = attachFiles($fp);
 243
 244          $postbody .= "\r\n--".mimeBoundary()."--\r\n\r\n";
 245          fputs ($fp, $postbody);
 246       } else {
 247          $body = sqStripSlashes($passedBody) . "\r\n";
 248          fputs ($fp, $body);
 249          $postbody = "\r\n";
 250          fputs ($fp, $postbody);
 251       }
 252
 253       return (strlen($body) + strlen($postbody) + $attachmentlength);
 254    }
 255
 256    // Send mail using the sendmail command
 257    function sendSendmail($t, $c, $b, $subject, $body, $more_headers) {
 258       global $sendmail_path, $username, $domain;
 259
 260       // Build envelope sender address. Make sure it doesn't contain
 261       // spaces or other "weird" chars that would allow a user to
 262       // exploit the shell/pipe it is used in.
 263       $envelopefrom = "$username@$domain";
 264       $envelopefrom = ereg_replace("[[:blank:]]","", $envelopefrom);
 265       $envelopefrom = ereg_replace("[[:space:]]","", $envelopefrom);
 266       $envelopefrom = ereg_replace("[[:cntrl:]]","", $envelopefrom);
 267
 268       // open pipe to sendmail
 269       $fp = popen (escapeshellcmd("$sendmail_path -t -f$envelopefrom"), "w");
 270
 271       $headerlength = write822Header ($fp, $t, $c, $b, $subject, $more_headers);
 272       $bodylength = writeBody($fp, $body);
 273
 274       pclose($fp);
 275
 276       return ($headerlength + $bodylength);
 277    }
 278
 279    function smtpReadData($smtpConnection) {
 280       $read = fgets($smtpConnection, 1024);
 281       $counter = 0;
 282       while ($read) {
 283          echo $read . "<BR>";
 284          $data[$counter] = $read;
 285          $read = fgets($smtpConnection, 1024);
 286          $counter++;
 287       }
 288    }
 289
 290    function sendSMTP($t, $c, $b, $subject, $body, $more_headers) {
 291       global $username, $domain, $version, $smtpServerAddress, $smtpPort,
 292          $data_dir, $color;
 293
 294       $to = parseAddrs($t);
 295       $cc = parseAddrs($c);
 296       $bcc = parseAddrs($b);
 297       $from_addr = getPref($data_dir, $username, "email_address");
 298
 299
 300       /*
 301        *  A patch from Bill Thousand <billyt@claritytech.com>
 302        *
 303        *  "I don't know if anyone else needs this or not, but it totally makes squirrelmail usable for us.
 304        *  This quick patch checks the username and from address for the domain information.  We use
 305        *  a virtual domain patch for our imap server that allows multiple domains by using username@domain.com
 306        *  as the login username."
 307        */
 308       if ($from_addr == "") {
 309          if (strstr($username, "@")) {
 310             $from_addr = $username;
 311             $address_pieces = explode("@",$username);
 312             $domain = $address_pieces[1];
 313          } else {
 314             $from_addr = "$username@$domain";
 315          }
 316       } else {
 317          // If the From Address is specified, use the domain in the from
 318          // address if it's there.
 319          if (strstr($from_addr, "@")) {
 320             $address_pieces = explode("@", $from_addr);
 321             $domain = $address_pieces[1];
 322          }
 323       }
 324       /*
 325        *  End patch from Bill Thousand
 326        */
 327
 328
 329       $smtpConnection = fsockopen($smtpServerAddress, $smtpPort, $errorNumber, $errorString);
 330       if (!$smtpConnection) {
 331          echo "Error connecting to SMTP Server.<br>";
 332          echo "$errorNumber : $errorString<br>";
 333          exit;
 334       }
 335       $tmp = fgets($smtpConnection, 1024);
 336       errorCheck($tmp, $smtpConnection);
 337
 338       $to_list = getLineOfAddrs($to);
 339       $cc_list = getLineOfAddrs($cc);
 340
 341       /** Lets introduce ourselves */
 342       fputs($smtpConnection, "HELO $domain\r\n");
 343       $tmp = fgets($smtpConnection, 1024);
 344       errorCheck($tmp, $smtpConnection);
 345
 346       /** Ok, who is sending the message? */
 347       fputs($smtpConnection, "MAIL FROM:<$from_addr>\r\n");
 348       $tmp = fgets($smtpConnection, 1024);
 349       errorCheck($tmp, $smtpConnection);
 350
 351       /** send who the recipients are */
 352       for ($i = 0; $i < count($to); $i++) {
 353          fputs($smtpConnection, "RCPT TO:<$to[$i]>\r\n");
 354          $tmp = fgets($smtpConnection, 1024);
 355          errorCheck($tmp, $smtpConnection);
 356       }
 357       for ($i = 0; $i < count($cc); $i++) {
 358          fputs($smtpConnection, "RCPT TO:<$cc[$i]>\r\n");
 359          $tmp = fgets($smtpConnection, 1024);
 360          errorCheck($tmp, $smtpConnection);
 361       }
 362       for ($i = 0; $i < count($bcc); $i++) {
 363          fputs($smtpConnection, "RCPT TO:<$bcc[$i]>\r\n");
 364          $tmp = fgets($smtpConnection, 1024);
 365          errorCheck($tmp, $smtpConnection);
 366       }
 367
 368       /** Lets start sending the actual message */
 369       fputs($smtpConnection, "DATA\r\n");
 370       $tmp = fgets($smtpConnection, 1024);
 371       errorCheck($tmp, $smtpConnection);
 372
 373       // Send the message
 374       $headerlength = write822Header ($smtpConnection, $t, $c, $b, $subject, $more_headers);
 375       $bodylength = writeBody($smtpConnection, $body);
 376
 377       fputs($smtpConnection, ".\r\n"); // end the DATA part
 378       $tmp = fgets($smtpConnection, 1024);
 379       $num = errorCheck($tmp, $smtpConnection);
 380       if ($num != 250) {
 381          $tmp = nl2br(htmlspecialchars($tmp));
 382          echo "ERROR<BR>Message not sent!<BR>Reason given: $tmp<BR></BODY></HTML>";
 383       }
 384
 385       fputs($smtpConnection, "QUIT\r\n"); // log off
 386
 387       fclose($smtpConnection);
 388
 389       return ($headerlength + $bodylength);
 390    }
 391
 392
 393    function errorCheck($line, $smtpConnection) {
 394       global $page_header_php;
 395       global $color;
 396       if (!isset($page_header_php)) {
 397          include "../functions/page_header.php";
 398       }
 399
 400       // Read new lines on a multiline response
 401       $lines = $line;
 402       while(ereg("^[0-9]+-", $line)) {
 403          $line = fgets($smtpConnection, 1024);
 404          $lines .= $line;
 405       }
 406
 407       // Status:  0 = fatal
 408       //          5 = ok
 409
 410       $err_num = substr($line, 0, strpos($line, " "));
 411       switch ($err_num) {
 412          case 500:   $message = "Syntax error; command not recognized";
 413                      $status = 0;
 414                      break;
 415          case 501:   $message = "Syntax error in parameters or arguments";
 416                      $status = 0;
 417                      break;
 418          case 502:   $message = "Command not implemented";
 419                      $status = 0;
 420                      break;
 421          case 503:   $message = "Bad sequence of commands";
 422                      $status = 0;
 423                      break;
 424          case 504:   $message = "Command parameter not implemented";
 425                      $status = 0;
 426                      break;
 427
 428
 429          case 211:   $message = "System status, or system help reply";
 430                      $status = 5;
 431                      break;
 432          case 214:   $message = "Help message";
 433                      $status = 5;
 434                      break;
 435
 436
 437          case 220:   $message = "Service ready";
 438                      $status = 5;
 439                      break;
 440          case 221:   $message = "Service closing transmission channel";
 441                      $status = 5;
 442                      break;
 443          case 421:   $message = "Service not available, closing chanel";
 444                      $status = 0;
 445                      break;
 446
 447
 448          case 250:   $message = "Requested mail action okay, completed";
 449                      $status = 5;
 450                      break;
 451          case 251:   $message = "User not local; will forward";
 452                      $status = 5;
 453                      break;
 454          case 450:   $message = "Requested mail action not taken:  mailbox unavailable";
 455                      $status = 0;
 456                      break;
 457          case 550:   $message = "Requested action not taken:  mailbox unavailable";
 458                      $status = 0;
 459                      break;
 460          case 451:   $message = "Requested action aborted:  error in processing";
 461                      $status = 0;
 462                      break;
 463          case 551:   $message = "User not local; please try forwarding";
 464                      $status = 0;
 465                      break;
 466          case 452:   $message = "Requested action not taken:  insufficient system storage";
 467                      $status = 0;
 468                      break;
 469          case 552:   $message = "Requested mail action aborted:  exceeding storage allocation";
 470                      $status = 0;
 471                      break;
 472          case 553:   $message = "Requested action not taken: mailbox name not allowed";
 473                      $status = 0;
 474                      break;
 475          case 354:   $message = "Start mail input; end with .";
 476                      $status = 5;
 477                      break;
 478          case 554:   $message = "Transaction failed";
 479                      $status = 0;
 480                      break;
 481          default:    $message = "Unknown response: ". nl2br(htmlspecialchars($lines));
 482                      $status = 0;
 483                      $error_num = "001";
 484                      break;
 485       }
 486
 487       if ($status == 0) {
 488          displayPageHeader($color, "None");
 489          echo "<TT>";
 490          echo "<br><b><font color=\"$color[1]\">ERROR</font></b><br><br>";
 491          echo "&nbsp;&nbsp;&nbsp;<B>Error Number: </B>$err_num<BR>";
 492          echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Reason: </B>$message<BR>";
 493          $lines = nl2br(htmlspecialchars($lines));
 494          echo "<B>Server Response: </B>$lines<BR>";
 495          echo "<BR>MAIL NOT SENT";
 496          echo "</TT></BODY></HTML>";
 497          exit;
 498       }
 499       return $err_num;
 500    }
 501
 502    function sendMessage($t, $c, $b, $subject, $body, $reply_id) {
 503       global $useSendmail, $msg_id, $is_reply, $mailbox;
 504       global $data_dir, $username, $domain, $key, $version, $sent_folder, $imapServerAddress, $imapPort;
 505       $more_headers = Array();
 506
 507       $imap_stream = sqimap_login($username, $key, $imapServerAddress, $imapPort, 1);
 508
 509       if ($reply_id) {
 510          sqimap_mailbox_select ($imap_stream, $mailbox);
 511          sqimap_messages_flag ($imap_stream, $reply_id, $reply_id, "Answered");
 512
 513          // Insert In-Reply-To and References headers if the
 514          // message-id of the message we reply to is set (longer than "<>")
 515          // The References header should really be the old Referenced header
 516          // with the message ID appended, but it can be only the message ID too.
 517          $hdr = sqimap_get_small_header ($imap_stream, $reply_id, false);
 518          if(strlen($hdr->message_id) > 2) {
 519             $more_headers["In-Reply-To"] = $hdr->message_id;
 520             $more_headers["References"]  = $hdr->message_id;
 521          }
 522          sqimap_mailbox_close($imap_stream);
 523       }
 524
 525       if ($useSendmail==true) {
 526          $length = sendSendmail($t, $c, $b, $subject, $body, $more_headers);
 527       } else {
 528          $length = sendSMTP($t, $c, $b, $subject, $body, $more_headers);
 529       }
 530
 531       if (sqimap_mailbox_exists ($imap_stream, $sent_folder)) {
 532          sqimap_append ($imap_stream, $sent_folder, $length);
 533          write822Header ($imap_stream, $t, $c, $b, $subject, $more_headers);
 534          writeBody ($imap_stream, $body);
 535          sqimap_append_done ($imap_stream);
 536       }
 537       sqimap_logout($imap_stream);
 538       // Delete the files uploaded for attaching (if any).
 539       deleteAttachments();
 540    }
 541 ?>