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