class/mime.class.php

   1 <?php
   2
   3 /**
   4  * mime.class
   5  *
   6  * Copyright (c) 2002 The SquirrelMail Project Team
   7  * Licensed under the GNU GPL. For full terms see the file COPYING.
   8  *
   9  * This contains functions needed to handle mime messages.
  10  *
  11  * $Id$
  12  */
  13
  14 /*
  15  * rdc822_header class
  16  * input: header_string or array
  17  */
  18 class rfc822_header {
  19     var $date = '',
  20         $subject = '',
  21         $from = array(),
  22         $sender = '',
  23         $reply_to = array(),
  24         $to = array(),
  25         $cc = array(),
  26         $bcc = array(),
  27         $in_reply_to = '',
  28         $message_id = '',
  29         $mime = false,
  30         $content_type = '',
  31         $disposition = '',
  32         $xmailer = '',
  33         $priority = 3,
  34         $dnt = '',
  35         $mlist = array(),
  36         $more_headers = array(); /* only needed for constructing headers
  37                                     in smtp.php */
  38     function parseHeader($hdr) {
  39         if (is_array($hdr)) {
  40             $hdr = implode('', $hdr);
  41         }
  42
  43         /* First we unfold the header */
  44         $hdr = trim(str_replace(array("\r\n\t", "\r\n "),array('', ''), $hdr));
  45
  46         /* Now we can make a new header array with */
  47         /* each element representing a headerline  */
  48         $hdr = explode("\r\n" , $hdr);
  49         foreach ($hdr as $line) {
  50             $pos = strpos($line, ':');
  51             if ($pos > 0) {
  52                 $field = substr($line, 0, $pos);
  53                 $value = trim(substr($line, $pos+1));
  54                 if(!preg_match('/^X.*/i', $field) &&
  55                    !preg_match('/^Subject/i', $field)) {
  56                     $value = $this->stripComments($value);
  57                 }
  58                 $this->parseField($field, $value);
  59             }
  60         }
  61         if ($this->content_type == '') {
  62             $this->parseContentType('text/plain; charset=us-ascii');
  63         }
  64     }
  65
  66     function stripComments($value) {
  67         $result = '';
  68
  69         $cnt = strlen($value);
  70         for ($i = 0; $i < $cnt; $i++) {
  71             switch ($value{$i}) {
  72                 case '"':
  73                     $result .= '"';
  74                     while ((++$i < $cnt) && ($value{$i} != '"')) {
  75                         if ($value{$i} == '\\') {
  76                             $result .= '\\';
  77                             $i++;
  78                         }
  79                         $result .= $value{$i};
  80                     }
  81                     $result .= $value{$i};
  82                     break;
  83                 case '(':
  84                     $depth = 1;
  85                     while (($depth > 0) && (++$i < $cnt)) {
  86                         switch($value{$i}) {
  87                             case '\\':
  88                                 $i++;
  89                                 break;
  90                             case '(':
  91                                 $depth++;
  92                                 break;
  93                             case ')':
  94                                 $depth--;
  95                                 break;
  96                             default:
  97                                 break;
  98                         }
  99                     }
 100                     break;
 101                 default:
 102                     $result .= $value{$i};
 103                     break;
 104             }
 105         }
 106         return $result;
 107     }
 108
 109     function parseField($field, $value) {
 110         $field = strtolower($field);
 111         switch($field) {
 112             case 'date':
 113                 $d = strtr($value, array('  ' => ' '));
 114                 $d = explode(' ', $d);
 115                 $this->date = getTimeStamp($d);
 116                 break;
 117             case 'subject':
 118                 $this->subject = $value;
 119                 break;
 120             case 'from':
 121                 $this->from = $this->parseAddress($value,true);
 122                 break;
 123             case 'sender':
 124                 $this->sender = $this->parseAddress($value);
 125                 break;
 126             case 'reply-to':
 127                 $this->reply_to = $this->parseAddress($value, true);
 128                 break;
 129             case 'to':
 130                 $this->to = $this->parseAddress($value, true);
 131                 break;
 132             case 'cc':
 133                 $this->cc = $this->parseAddress($value, true);
 134                 break;
 135             case 'bcc':
 136                 $this->bcc = $this->parseAddress($value, true);
 137                 break;
 138             case 'in-reply-to':
 139                 $this->in_reply_to = $value;
 140                 break;
 141             case 'message-id':
 142                 $this->message_id = $value;
 143                 break;
 144             case 'disposition-notification-to':
 145                 $this->dnt = $this->parseAddress($value);
 146                 break;
 147             case 'mime-version':
 148                 $value = str_replace(' ', '', $value);
 149                 $this->mime = ($value == '1.0' ? true : $this->mime);
 150                 break;
 151             case 'content-type':
 152                 $this->parseContentType($value);
 153                 break;
 154             case 'content-disposition':
 155                 $this->parseDisposition($value);
 156                 break;
 157             case 'user-agent':
 158             case 'x-mailer':
 159                 $this->xmailer = $value;
 160                 break;
 161             case 'x-priority':
 162                 $this->priority = $value;
 163                 break;
 164             case 'list-post':
 165                 $this->mlist('post', $value);
 166                 break;
 167             case 'list-reply':
 168                 $this->mlist('reply', $value);
 169                 break;
 170             case 'list-subscribe':
 171                 $this->mlist('subscribe', $value);
 172                 break;
 173             case 'list-unsubscribe':
 174                 $this->mlist('unsubscribe', $value);
 175                 break;
 176             case 'list-archive':
 177                 $this->mlist('archive', $value);
 178                 break;
 179             case 'list-owner':
 180                 $this->mlist('owner', $value);
 181                 break;
 182             case 'list-help':
 183                 $this->mlist('help', $value);
 184                 break;
 185             case 'list-id':
 186                 $this->mlist('id', $value);
 187                 break;
 188             default:
 189                 break;
 190         }
 191     }
 192
 193     function parseAddress
 194     ($address, $ar=false, $addr_ar = array(), $group = '') {
 195         $pos = 0;
 196         $j = strlen($address);
 197         $name = '';
 198         $addr = '';
 199         while ($pos < $j) {
 200             switch ($address{$pos}) {
 201                 case '"': /* get the personal name */
 202                     if ($address{++$pos} == '"') {
 203                         ++$pos;
 204                     } else {
 205                         while ($pos < $j && $address{$pos} != '"') {
 206                             if ((substr($address, $pos, 2) == '\\"') ||
 207                                 (substr($address, $pos, 2) == '\\\\')) {
 208                                 $name .= $address{$pos++};
 209                             }
 210                             $name .= $address{$pos++};
 211                         }
 212                     }
 213                     ++$pos;
 214                     break;
 215                 case '<':  /* get email address */
 216                     $addr_start = $pos++;
 217                     while ($pos < $j && $address{$pos} != '>') {
 218                         $addr .= $address{$pos++};
 219                     }
 220                     ++$pos;
 221                     break;
 222                 case '(':  /* rip off comments */
 223                     $addr_start = $pos;
 224                     for (++$pos; $pos < $j && $address{$pos} != ')'; ++$pos) {
 225                         $addr .= $address{$pos};
 226                     }
 227                     $address_start = substr($address, 0, $addr_start);
 228                     $address_end   = substr($address, $pos + 1);
 229                     $address       = $address_start . $address_end;
 230                     $j = strlen($address);
 231                     $pos = $addr_start + 1;
 232                     break;
 233                 case ',':  /* we reached a delimiter */
 234                     if ($addr == '') {
 235                         $addr = substr($address, 0, $pos);
 236                     } else if ($name == '') {
 237                         $name = trim(substr($address, 0, $addr_start));
 238                     }
 239
 240                     $at = strpos($addr, '@');
 241                     $addr_structure = new address_structure();
 242                     $addr_structure->personal = $name;
 243                     $addr_structure->group = $group;
 244                     if ($at) {
 245                         $addr_structure->mailbox = substr($addr, 0, $at);
 246                         $addr_structure->host = substr($addr, $at+1);
 247                     } else {
 248                         $addr_structure->mailbox = $addr;
 249                     }
 250                     $address = trim(substr($address, $pos+1));
 251                     $j = strlen($address);
 252                     $pos = 0;
 253                     $name = '';
 254                     $addr = '';
 255                     $addr_ar[] = $addr_structure;
 256                     break;
 257                 case ':':  /* process the group addresses */
 258                     /* group marker */
 259                     $group = substr($address, 0, $pos);
 260                     $address = substr($address, $pos+1);
 261                     $result = $this->parseAddress($address, $ar, $addr_ar, $group);
 262                     $addr_ar = $result[0];
 263                     $pos = $result[1];
 264                     $address = substr($address, $pos++);
 265                     $j = strlen($address);
 266                     $group = '';
 267                     break;
 268                 case ';':
 269                     if ($group) {
 270                         $address = substr($address, 0, $pos - 1);
 271                     }
 272                     ++$pos;
 273                     break;
 274                 default:
 275                     ++$pos;
 276                     break;
 277             }
 278         }
 279         if ($addr == '') {
 280             $addr = substr($address, 0, $pos);
 281         } else if ($name == '') {
 282             $name = trim(substr($address, 0, $addr_start));
 283         }
 284         $at = strpos($addr, '@');
 285         $addr_structure = new address_structure();
 286         $addr_structure->group = $group;
 287         if ($at) {
 288             $addr_structure->mailbox = trim(substr($addr, 0, $at));
 289             $addr_structure->host = trim(substr($addr, $at+1));
 290         } else {
 291             $addr_structure->mailbox = trim($addr);
 292         }
 293         if ($group && $addr == '') { /* no addresses found in group */
 294             $name = "$group: Undisclosed recipients;";
 295             $addr_structure->personal = $name;
 296             $addr_ar[] = $addr_structure;
 297             return (array($addr_ar, $pos+1));
 298         } else {
 299             $addr_structure->personal = $name;
 300             if ($name || $addr) {
 301                 $addr_ar[] = $addr_structure;
 302             }
 303         }
 304         if ($ar) {
 305             return ($addr_ar);
 306         }
 307         return ($addr_ar[0]);
 308     }
 309
 310     function parseContentType($value) {
 311         $pos = strpos($value, ';');
 312         $props = '';
 313         if ($pos > 0) {
 314            $type = trim(substr($value, 0, $pos));
 315            $props = trim(substr($type, $pos+1));
 316         } else {
 317            $type = $value;
 318         }
 319         $content_type = new content_type($type);
 320         if ($props) {
 321             $properties = $this->parseProperties($props);
 322             if (!isset($properties['charset'])) {
 323                 $properties['charset'] = 'us-ascii';
 324             }
 325             $content_type->properties = $this->parseProperties($props);
 326         }
 327         $this->content_type = $content_type;
 328     }
 329
 330     function parseProperties($value) {
 331         $propArray = explode(';', $value);
 332         $propResultArray = array();
 333         foreach ($propArray as $prop) {
 334             $prop = trim($prop);
 335             $pos = strpos($prop, '=');
 336             if ($pos > 0)  {
 337                 $key = trim(substr($prop, 0, $pos));
 338                 $val = trim(substr($prop, $pos+1));
 339                 if ($val{0} == '"') {
 340                     $val = substr($val, 1, -1);
 341                 }
 342                 $propResultArray[$key] = $val;
 343             }
 344         }
 345         return $propResultArray;
 346     }
 347
 348     function parseDisposition($value) {
 349         $pos = strpos($value, ';');
 350         $props = '';
 351         if ($pos > 0) {
 352             $name = trim(substr($value, 0, $pos));
 353             $props = trim(substr($type, $pos+1));
 354         } else {
 355             $name = $value;
 356         }
 357         $props_a = $this->parseProperties($props);
 358         $disp = new disposition($name);
 359         $disp->properties = $props_a;
 360         $this->disposition = $disp;
 361     }
 362
 363     function mlist($field, $value) {
 364         $res_a = array();
 365         $value_a = explode(',', $value);
 366         foreach ($value_a as $val) {
 367             $val = trim($val);
 368             if ($val{0} == '<') {
 369                 $val = substr($val, 1, -1);
 370             }
 371             if (substr($val, 0, 7) == 'mailto:') {
 372                 $res_a['mailto'] = substr($val, 7);
 373             } else {
 374                 $res_a['href'] = $val;
 375             }
 376         }
 377         $this->mlist[$field] = $res_a;
 378     }
 379
 380     /*
 381      * function to get the addres strings out of the header.
 382      * Arguments: string or array of strings !
 383      * example1: header->getAddr_s('to').
 384      * example2: header->getAddr_s(array('to', 'cc', 'bcc'))
 385      */
 386     function getAddr_s($arr, $separator = ',') {
 387         $s = '';
 388
 389         if (is_array($arr)) {
 390             foreach($arr as $arg) {
 391                 if ($this->getAddr_s($arg)) {
 392                     $s .= $separator . $result;
 393                 }
 394             }
 395             $s = ($s ? substr($s, 2) : $s);
 396         } else {
 397             eval('$addr = $this->' . $arr . ';') ;
 398             if (is_array($addr)) {
 399                 foreach ($addr as $addr_o) {
 400                     if (is_object($addr_o)) {
 401                         $s .= $addr_o->getAddress() . $separator;
 402                     }
 403                 }
 404                 $s = substr($s, 0, -strlen($separator));
 405             } else {
 406                 if (is_object($addr)) {
 407                     $s .= $addr->getAddress();
 408                 }
 409             }
 410         }
 411         return $s;
 412     }
 413
 414     function getAddr_a($arg, $excl_arr = array(), $arr = array()) {
 415         if (is_array($arg)) {
 416             foreach($arg as $argument) {
 417                 $arr = $this->getAddr_a($argument, $excl_arr, $arr);
 418             }
 419         } else {
 420             eval('$addr = $this->' . $arg . ';') ;
 421             if (is_array($addr)) {
 422                 foreach ($addr as $next_addr) {
 423                     if (is_object($next_addr)) {
 424                         if (isset($next_addr->host) && ($next_addr->host != '')) {
 425                             $email = $next_addr->mailbox . '@' . $next_addr->host;
 426                         } else {
 427                             $email = $next_addr->mailbox;
 428                         }
 429                         $email = strtolower($email);
 430                         if ($email && !isset($arr[$email]) && !isset($excl_arr[$email])) {
 431                             $arr[$email] = $next_addr->personal;
 432                         }
 433                     }
 434                 }
 435             } else {
 436                 if (is_object($addr)) {
 437                     $email  = $addr->mailbox;
 438                     $email .= (isset($addr->host) ? '@' . $addr->host : '');
 439                     $email  = strtolower($email);
 440                     if ($email && !isset($arr[$email]) && !isset($excl_arr[$email])) {
 441                         $arr[$email] = $addr->personal;
 442                     }
 443                 }
 444             }
 445         }
 446         return $arr;
 447     }
 448
 449     function getContentType($type0, $type1) {
 450         $type0 = $this->content_type->type0;
 451         $type1 = $this->content_type->type1;
 452         return $this->content_type->properties;
 453     }
 454 }
 455
 456 class msg_header {
 457     /** msg_header contains all variables available in a bodystructure **/
 458     /** entity like described in rfc2060                               **/
 459
 460     var $type0 = '',
 461         $type1 = '',
 462         $parameters = array(),
 463         $id = 0,
 464         $description = '',
 465         $encoding='',
 466         $size = 0,
 467         $md5='',
 468         $disposition = '',
 469         $language='';
 470
 471     /*
 472      * returns addres_list of supplied argument
 473      * arguments: array('to', 'from', ...) or just a string like 'to'.
 474      * result: string: address1, addres2, ....
 475      */
 476
 477     function setVar($var, $value) {
 478         $this->{$var} = $value;
 479     }
 480
 481     function getParameter($p) {
 482         $value = strtolower($p);
 483         return (isset($this->parameters[$p]) ? $this->parameters[$p] : '');
 484     }
 485
 486     function setParameter($parameter, $value) {
 487         $this->parameters[strtolower($parameter)] = $value;
 488     }
 489 }
 490
 491
 492
 493 class address_structure {
 494     var $personal = '',
 495         $adl      = '',
 496         $mailbox  = '',
 497         $host     = '',
 498         $group    = '';
 499
 500     function getAddress($full = true) {
 501         $result = '';
 502
 503         if (is_object($this)) {
 504             if (isset($this->host) && ($this->host != '')) {
 505                 $email = $this->mailbox.'@'.$this->host;
 506             } else {
 507                 $email = $this->mailbox;
 508             }
 509             if (trim($this->personal) != '') {
 510                 if ($email) {
 511                     $addr = '"' . $this->personal . '" <' .$email.'>';
 512                 } else {
 513                     $addr = $this->personal;
 514                 }
 515                 $best_dpl = $this->personal;
 516             } else {
 517                 $addr = $email;
 518                 $best_dpl = $email;
 519             }
 520             $result = ($full ? $addr : $best_dpl);
 521         }
 522         return $result;
 523     }
 524 }
 525
 526 class message {
 527     /** message is the object that contains messages.  It is a recursive
 528         object in that through the $entities variable, it can contain
 529         more objects of type message.  See documentation in mime.txt for
 530         a better description of how this works.
 531     **/
 532     var $rfc822_header = '',
 533         $mime_header = '',
 534         $flags = '',
 535         $type0='',
 536         $type1='',
 537         $entities = array(),
 538         $parent_ent, $entity,
 539         $parent = '', $decoded_body='',
 540         $is_seen = 0, $is_answered = 0, $is_deleted = 0, $is_flagged = 0,
 541         $is_mdnsent = 0,
 542         $body_part = '',
 543         $offset = 0,  /* for fetching body parts out of raw messages */
 544         $length = 0;  /* for fetching body parts out of raw messages */
 545
 546     function setEnt($ent) {
 547         $this->entity_id= $ent;
 548     }
 549
 550     function addEntity ($msg) {
 551         $msg->parent = &$this;
 552         $this->entities[] = $msg;
 553     }
 554
 555     function getFilename() {
 556         $filename = '';
 557         $filename = $this->header->getParameter('filename');
 558         if (!$filename) {
 559             $filename = $this->header->getParameter('name');
 560         }
 561
 562         if (!$filename) {
 563             $filename = 'untitled-'.$this->entity_id;
 564         }
 565         return $filename;
 566     }
 567
 568
 569     function addRFC822Header($read) {
 570         $header = new rfc822_header();
 571         $this->rfc822_header = $header->parseHeader($read);
 572     }
 573
 574     function getEntity($ent) {
 575         $cur_ent = $this->entity_id;
 576         $msg = $this;
 577         if (($cur_ent == '') || ($cur_ent == '0')) {
 578             $cur_ent_a = array();
 579         } else {
 580             $cur_ent_a = explode('.', $this->entity_id);
 581         }
 582         $ent_a = explode('.', $ent);
 583
 584         $cnt = count($ent_a);
 585
 586         for ($i = 0; $i < $cnt -1; ++$i) {
 587             if (isset($cur_ent_a[$i]) && ($cur_ent_a[$i] != $ent_a[$i])) {
 588                 $msg = $msg->parent;
 589                 $cur_ent_a = explode('.', $msg->entity_id);
 590                 --$i;
 591             } else if (!isset($cur_ent_a[$i])) {
 592                 if (isset($msg->entities[($ent_a[$i]-1)])) {
 593                     $msg = $msg->entities[($ent_a[$i]-1)];
 594                 } else {
 595                     $msg = $msg->entities[0];
 596                 }
 597             }
 598             if (($msg->type0 == 'message') && ($msg->type1 == 'rfc822')) {
 599                 /*this is a header for a message/rfc822 entity */
 600                 $msg = $msg->entities[0];
 601             }
 602         }
 603
 604         if (($msg->type0 == 'message') && ($msg->type1 == 'rfc822')) {
 605             /*this is a header for a message/rfc822 entity */
 606             $msg = $msg->entities[0];
 607         }
 608
 609         if (isset($msg->entities[($ent_a[$cnt-1])-1])) {
 610             if (is_object($msg->entities[($ent_a[$cnt-1])-1])) {
 611                 $msg = $msg->entities[($ent_a[$cnt-1]-1)];
 612             }
 613         }
 614
 615         return $msg;
 616     }
 617
 618     function setBody($s) {
 619         $this->body_part = $s;
 620     }
 621
 622     function clean_up() {
 623         $msg = $this;
 624         $msg->body_part = '';
 625
 626         foreach ($msg->entities as $m) {
 627             $m->clean_up();
 628         }
 629     }
 630
 631     function getMailbox() {
 632         $msg = $this;
 633         while (is_object($msg->parent)) {
 634             $msg = $msg->parent;
 635         }
 636         return $msg->mailbox;
 637     }
 638
 639     function calcEntity($msg) {
 640         if (($this->type0 == 'message') && ($this->type1 == 'rfc822')) {
 641             $msg->entity_id = $this->entity_id .'.0'; /* header of message/rfc822 */
 642         } else if (isset($this->entity_id) && ($this->entity_id != '')) {
 643             $ent_no = count($this->entities)+1;
 644             $par_ent = substr($this->entity_id, -2);
 645             if ($par_ent{0} == '.') {
 646                 $par_ent = $par_ent{1};
 647             }
 648             if ($par_ent == '0') {
 649                 $ent_no = count($this->entities) + 1;
 650                 if ($ent_no > 0) {
 651                     $ent = substr($this->entity_id, 0, strrpos($this->entity_id, '.'));
 652                     $ent = ($ent ? $ent . ".$ent_no" : $ent_no);
 653                     $msg->entity_id = $ent;
 654                 } else {
 655                     $msg->entity_id = $ent_no;
 656                 }
 657             } else {
 658                 $ent = $this->entity_id . ".$ent_no";
 659                 $msg->entity_id = $ent;
 660             }
 661         } else {
 662             $msg->entity_id = '0';
 663         }
 664
 665         return $msg->entity_id;
 666     }
 667
 668
 669     /*
 670      * Bodystructure parser, a recursive function for generating the
 671      * entity-tree with all the mime-parts.
 672      *
 673      * It follows RFC2060 and stores all the described fields in the
 674      * message object.
 675      *
 676      * Question/Bugs:
 677      *
 678      * Ask for me (Marc Groot Koerkamp, stekkel@users.sourceforge.net)
 679      *
 680      */
 681     function parseStructure($read, $i = 0) {
 682         $arg_no = 0;
 683         $arg_a  = array();
 684         $cnt    = strlen($read);
 685
 686         for (; $i < $cnt; ++$i) {
 687             $char = strtoupper($read{$i});
 688             switch ($char) {
 689                 case '(':
 690                     switch($arg_no) {
 691                         case 0:
 692                             if (!isset($msg)) {
 693                                 $msg = new message();
 694                                 $hdr = new msg_header();
 695                                 $hdr->type0 = 'text';
 696                                 $hdr->type1 = 'plain';
 697                                 $hdr->encoding = 'us-ascii';
 698                                 $msg->entity_id = $this->calcEntity($msg);
 699                             } else {
 700                                 $msg->header->type0 = 'multipart';
 701                                 $msg->type0 = 'multipart';
 702                                 while ($read{$i} == '(') {
 703                                     $res = $msg->parseStructure($read, $i);
 704                                     $i = $res[1];
 705                                     $msg->addEntity($res[0]);
 706                                 }
 707                             }
 708                             break;
 709                         case 1:
 710                             /* multipart properties */
 711                             ++$i;
 712                             $res = $this->parseProperties($read, $i);
 713                             $arg_a[] = $res[0];
 714                             $i = $res[1];
 715                             ++$arg_no;
 716                             break;
 717                         case 2:
 718                             if (isset($msg->type0) && ($msg->type0 == 'multipart')) {
 719                                 ++$i;
 720                                 $res = $msg->parseDisposition($read, $i);
 721                             } else { /* properties */
 722                                 $res = $msg->parseProperties($read, $i);
 723                             }
 724                             $arg_a[] = $res[0];
 725                             $i = $res[1];
 726                             ++$arg_no;
 727                             break;
 728                         case 3:
 729                             if (isset($msg->type0) && ($msg->type0 == 'multipart')) {
 730                                 ++$i;
 731                                 $res= $msg->parseLanguage($read, $i);
 732                                 $arg_a[] = $res[0];
 733                                 $i = $res[1];
 734                             }
 735                         case 7:
 736                             if (($arg_a[0] == 'message') && ($arg_a[1] == 'rfc822')) {
 737                                 $msg->header->type0 = $arg_a[0];
 738                                 $msg->header->type1 = $arg_a[1];
 739                                 $msg->type0 = $arg_a[0];
 740                                 $msg->type1 = $arg_a[1];
 741                                 $rfc822_hdr = new rfc822_header();
 742                                 $res = $msg->parseEnvelope($read, $i, $rfc822_hdr);
 743                                 $msg->rfc822_header = $res[0];
 744                                 $i = $res[1] + 1;
 745                                 while (($i < $cnt) && ($read{$i} != '(')) {
 746                                     ++$i;
 747                                 }
 748                                 $res = $msg->parseStructure($read, $i);
 749                                 $i = $res[1];
 750                                 $msg->addEntity($res[0]);
 751                             }
 752                             break;
 753                         case 8:
 754                             ++$i;
 755                             $res = $msg->parseDisposition($read, $i);
 756                             $arg_a[] = $res[0];
 757                             $i = $res[1];
 758                             ++$arg_no;
 759                             break;
 760                         case 9:
 761                             ++$i;
 762                             if (($arg_a[0] == 'text') || (($arg_a[0] == 'message') && ($arg_a[1] == 'rfc822'))) {
 763                                 $res = $msg->parseDisposition($read, $i);
 764                             } else {
 765                                 $res = $msg->parseLanguage($read, $i);
 766                             }
 767                             $arg_a[] = $res[0];
 768                             $i = $res[1];
 769                             ++$arg_no;
 770                             break;
 771                        case 10:
 772                            if (($arg_a[0] == 'text') || (($arg_a[0] == 'message') && ($arg_a[1] == 'rfc822'))) {
 773                                ++$i;
 774                                $res = $msg->parseLanguage($read, $i);
 775                                $arg_a[] = $res[0];
 776                                $i = $res[1];
 777                            } else {
 778                                $i = $msg->parseParenthesis($read, $i);
 779                                $arg_a[] = ''; /* not yet described in rfc2060 */
 780                            }
 781                            ++$arg_no;
 782                            break;
 783                        default:
 784                            /* unknown argument, skip this part */
 785                            $i = $msg->parseParenthesis($read, $i);
 786                            $arg_a[] = '';
 787                            ++$arg_no;
 788                            break;
 789                    } /* switch */
 790                    break;
 791                 case '"':
 792                     /* inside an entity -> start processing */
 793                     $debug = substr($read, $i, 20);
 794                     $res = $msg->parseQuote($read, $i);
 795                     $arg_s = $res[0];
 796                     $i = $res[1];
 797                     ++$arg_no;
 798                     if ($arg_no < 3) {
 799                         $arg_s = strtolower($arg_s); /* type0 and type1 */
 800                     }
 801                     $arg_a[] = $arg_s;
 802                     break;
 803                 case 'n':
 804                 case 'N':
 805                     /* probably NIL argument */
 806                     if (strtoupper(substr($read, $i, 4)) == 'NIL ') {
 807                         $arg_a[] = '';
 808                         ++$arg_no;
 809                         $i += 2;
 810                     }
 811                     break;
 812                 case '{':
 813                     /* process the literal value */
 814                     $res = $msg->parseLiteral($read, $i);
 815                     $arg_s = $res[0];
 816                     $i = $res[1];
 817                     ++$arg_no;
 818                     break;
 819                 case is_numeric($read{$i}):
 820                     /* process integers */
 821                     if ($read{$i} == ' ') { break; }
 822                     $arg_s = $read{$i};;
 823                     for (++$i; preg_match('/^[0-9]{1}$/', $read{$i}); ++$i) {
 824                         $arg_s .= $read{$i};
 825                     }
 826                     ++$arg_no;
 827                     $arg_a[] = $arg_s;
 828                     break;
 829                 case ')':
 830                     $multipart = (isset($msg->type0) && ($msg->type0 == 'multipart'));
 831                     if (!$multipart) {
 832                         $shifted_args = (($arg_a[0] == 'text') || (($arg_a[0] == 'message') && ($arg_a[1] == 'rfc822')));
 833                         $hdr->type0 = $arg_a[0];
 834                         $hdr->type1 = $arg_a[1];
 835
 836                         $msg->type0 = $arg_a[0];
 837                         $msg->type1 = $arg_a[1];
 838                         $arr = $arg_a[2];
 839                         if (is_array($arr)) {
 840                             $hdr->parameters = $arg_a[2];
 841                         }
 842                         $hdr->id = str_replace('<', '', str_replace('>', '', $arg_a[3]));
 843                         $hdr->description = $arg_a[4];
 844                         $hdr->encoding = strtolower($arg_a[5]);
 845                         $hdr->entity_id = $msg->entity_id;
 846                         $hdr->size = $arg_a[6];
 847                         if ($shifted_args) {
 848                             $hdr->lines = $arg_a[7];
 849                             $s = 1;
 850                         } else {
 851                             $s = 0;
 852                         }
 853                         $hdr->md5 = (isset($arg_a[7+$s]) ? $arg_a[7+$s] : $hdr->md5);
 854                         $hdr->disposition = (isset($arg_a[8+$s]) ? $arg_a[8+$s] : $hdr->disposition);
 855                         $hdr->language = (isset($arg_a[9+$s]) ? $arg_a[9+$s] : $hdr->language);
 856                         $msg->header = $hdr;
 857                         if ((strrchr($msg->entity_id, '.') == '.0') && ($msg->type0 !='multipart')) {
 858                            $msg->entity_id = $this->entity_id . '.1';
 859                         }
 860                     } else {
 861                         $hdr->type0 = 'multipart';
 862                         $hdr->type1 = $arg_a[0];
 863                         $msg->type0 = 'multipart';
 864                         $msg->type1 = $arg_a[0];
 865                         $hdr->parameters = (isset($arg_a[1]) ? $arg_a[1] : $hdr->parameters);
 866                         $hdr->disposition = (isset($arg_a[2]) ? $arg_a[2] : $hdr->disposition);
 867                         $hdr->language = (isset($arg_a[3]) ? $arg_a[3] : $hdr->language);
 868                         $msg->header = $hdr;
 869                     }
 870                     ++$i;
 871                     return (array($msg, $i));
 872                 default: break;
 873             } /* switch */
 874
 875         } /* for */
 876     } /* parsestructure */
 877
 878     function parseProperties($read, $i) {
 879         $properties = array();
 880         $prop_name = '';
 881
 882         for (; $read{$i} != ')'; ++$i) {
 883             $arg_s = '';
 884             if ($read{$i} == '"') {
 885                 $res = $this->parseQuote($read, $i);
 886                 $arg_s = $res[0];
 887                 $i = $res[1];
 888             } else if ($read{$i} == '{') {
 889                 $res = $this->parseLiteral($read, $i);
 890                 $arg_s = $res[0];
 891                 $i = $res[1];
 892             }
 893
 894             if ($arg_s != '') {
 895                 if ($prop_name == '') {
 896                     $prop_name = strtolower($arg_s);
 897                     $properties[$prop_name] = '';
 898                 } else if ($prop_name != '') {
 899                     $properties[$prop_name] = $arg_s;
 900                     $prop_name = '';
 901                 }
 902             }
 903         }
 904         return array($properties, $i);
 905     }
 906
 907     function parseEnvelope($read, $i, $hdr) {
 908         $arg_no = 0;
 909         $arg_a = array();
 910         $cnt = strlen($read);
 911
 912         for (; ($i < $cnt) && ($read{$i} != ')'); ++$i) {
 913             ++$i;
 914             $char = strtoupper($read{$i});
 915             switch ($char) {
 916                 case '"':
 917                     $res = $this->parseQuote($read, $i);
 918                     $arg_a[] = $res[0];
 919                     $i = $res[1];
 920                     ++$arg_no;
 921                     break;
 922                 case '{':
 923                     $res = $this->parseLiteral($read, $i);
 924                     $arg_a[] = $res[0];
 925                     $i = $res[1];
 926                     ++$arg_no;
 927                     break;
 928                 case 'N':
 929                     /* probably NIL argument */
 930                     if (strtoupper(substr($read, $i, 3)) == 'NIL') {
 931                         $arg_a[] = '';
 932                         ++$arg_no;
 933                         $i += 2;
 934                     }
 935                     break;
 936                 case '(':
 937                     /* Address structure (with group support)
 938                      * Note: Group support is useless on SMTP connections
 939                      *       because the protocol doesn't support it
 940                      */
 941                     $addr_a = array();
 942                     $group = '';
 943                     $a=0;
 944                     for (; $i < $cnt && $read{$i} != ')'; ++$i) {
 945                         if ($read{$i} == '(') {
 946                             $res = $this->parseAddress($read, $i);
 947                             $addr = $res[0];
 948                             $i = $res[1];
 949                             if (($addr->host == '') && ($addr->mailbox != '')) {
 950                                 /* start of group */
 951                                 $group = $addr->mailbox;
 952                                 $group_addr = $addr;
 953                                 $j = $a;
 954                             } else if ($group && ($addr->host == '') && ($addr->mailbox == '')) {
 955                                /* end group */
 956                                 if ($a == ($j+1)) { /* no group members */
 957                                     $group_addr->group = $group;
 958                                     $group_addr->mailbox = '';
 959                                     $group_addr->personal = "$group: Undisclosed recipients;";
 960                                     $addr_a[] = $group_addr;
 961                                     $group ='';
 962                                 }
 963                             } else {
 964                                 $addr->group = $group;
 965                                 $addr_a[] = $addr;
 966                             }
 967                             ++$a;
 968                         }
 969                     }
 970                     $arg_a[] = $addr_a;
 971                     break;
 972                 default: break;
 973             }
 974         }
 975
 976         if (count($arg_a) > 9) {
 977             /* argument 1: date */
 978             $d = strtr($arg_a[0], array('  ' => ' '));
 979             $d = explode(' ', $d);
 980             $hdr->date = getTimeStamp($d);
 981
 982             /* argument 2: subject */
 983             $arg_a[1] = (!trim($arg_a[1]) ? _("(no subject)") : $arg_a[1]);
 984             $hdr->subject = $arg_a[1];
 985
 986             $hdr->from = $arg_a[2][0];     /* argument 3: from        */
 987             $hdr->sender = $arg_a[3][0];   /* argument 4: sender      */
 988             $hdr->replyto = $arg_a[4][0];  /* argument 5: reply-to    */
 989             $hdr->to = $arg_a[5];          /* argument 6: to          */
 990             $hdr->cc = $arg_a[6];          /* argument 7: cc          */
 991             $hdr->bcc = $arg_a[7];         /* argument 8: bcc         */
 992             $hdr->inreplyto = $arg_a[8];   /* argument 9: in-reply-to */
 993             $hdr->message_id = $arg_a[9];  /* argument 10: message-id */
 994         }
 995         return (array($hdr, $i));
 996     }
 997
 998     function parseLiteral($read, $i) {
 999         $lit_cnt = '';
1000         for (++$i; $read{$i} != '}'; ++$i) {
1001             $lit_cnt .= $read{$i};
1002         }
1003
1004         $lit_cnt +=2; /* add the { and } characters */
1005         $s = '';
1006         for ($j = 0; $j < $lit_cnt; ++$j) {
1007             $s .= $read{++$i};
1008         }
1009         return (array($s, $i));
1010     }
1011
1012     function parseQuote($read, $i) {
1013         $s = '';
1014         for (++$i; $read{$i} != '"'; ++$i) {
1015             if ($read{$i} == '\\') {
1016                 ++$i;
1017              }
1018              $s .= $read{$i};
1019         }
1020         return (array($s, $i));
1021     }
1022
1023     function parseAddress($read, $i) {
1024         $arg_a = array();
1025
1026         for (; $read{$i} != ')'; ++$i) {
1027             $char = strtoupper($read{$i});
1028             switch ($char) {
1029                 case '"':
1030                 case '{':
1031                     $res = ($char == '"' ? $this->parseQuote($read, $i) : $this->parseLiteral($read, $i));
1032                     $arg_a[] = $res[0];
1033                     $i = $res[1];
1034                     break;
1035                 case 'n':
1036                 case 'N':
1037                     if (strtoupper(substr($read, $i, 3)) == 'NIL') {
1038                         $arg_a[] = '';
1039                         $i += 2;
1040                     }
1041                     break;
1042                 default: break;
1043             }
1044         }
1045
1046         if (count($arg_a) == 4) {
1047             $adr = new address_structure();
1048             $adr->personal = $arg_a[0];
1049             $adr->adl = $arg_a[1];
1050             $adr->mailbox = $arg_a[2];
1051             $adr->host = $arg_a[3];
1052         } else {
1053             $adr = '';
1054         }
1055         return (array($adr, $i));
1056     }
1057
1058     function parseDisposition($read, $i) {
1059         $arg_a = array();
1060
1061         for (; $read{$i} != ')'; ++$i) {
1062             switch ($read{$i}) {
1063                 case '"':
1064                 case '{':
1065                 case '(':
1066                     switch ($read{$i}) {
1067                         case '"': $res = $this->parseQuote($read, $i); break;
1068                         case '{': $res = $this->parseLiteral($read, $i); break;
1069                         case '(': $res = $this->parseProperties($read, $i); break;
1070                     }
1071                     $arg_a[] = $res[0];
1072                     $i = $res[1];
1073                     break;
1074                 default: break;
1075             }
1076         }
1077
1078         if (isset($arg_a[0])) {
1079             $disp = new disposition($arg_a[0]);
1080             if (isset($arg_a[1])) {
1081                 $disp->properties = $arg_a[1];
1082             }
1083         }
1084
1085         return (is_object($disp) ? array($disp, $i) : array('', $i));
1086     }
1087
1088     function parseLanguage($read, $i) {
1089         /* no idea how to process this one without examples */
1090         $arg_a = array();
1091
1092         for (; $read{$i} != ')'; ++$i) {
1093             switch ($read{$i}) {
1094                 case '"':
1095                 case '{':
1096                 case '(':
1097                     switch ($read{$i}) {
1098                         case '"': $res = $this->parseQuote($read, $i); break;
1099                         case '{': $res = $this->parseLiteral($read, $i); break;
1100                         case '(': $res = $this->parseProperties($read, $i); break;
1101                     }
1102                     $arg_a[] = $res[0];
1103                     $i = $res[1];
1104                     break;
1105                 default: break;
1106             }
1107         }
1108
1109         if (isset($arg_a[0])) {
1110             $lang = new language($arg_a[0]);
1111             if (isset($arg_a[1])) {
1112                 $lang->properties = $arg_a[1];
1113             }
1114         }
1115
1116         return (is_object($lang) ? array($lang, $i) : array('', $i));
1117     }
1118
1119     function parseParenthesis($read, $i) {
1120         for (; $read{$i} != ')'; ++$i) {
1121             switch ($read{$i}) {
1122                 case '"':
1123                 case '{':
1124                 case '(':
1125                     switch ($read{$i}) {
1126                         case '"': $res = $this->parseQuote($read, $i); break;
1127                         case '{': $res = $this->parseLiteral($read, $i); break;
1128                         case '(': $res = $this->parseProperties($read, $i); break;
1129                     }
1130                     $i = $res[1];
1131                     break;
1132                 default: break;
1133             }
1134         }
1135         return $i;
1136     }
1137
1138     /* Function to fill the message structure in case the */
1139     /* bodystructure is not available NOT FINISHED YET    */
1140     function parseMessage($read, $type0, $type1) {
1141         switch ($type0) {
1142             case 'message':
1143                 $rfc822_header = true;
1144                 $mime_header = false;
1145                 break;
1146             case 'multipart':
1147                 $rfc822_header = false;
1148                 $mime_header = true;
1149                 break;
1150             default: return $read;
1151         }
1152
1153         for ($i = 1; $i < $count; ++$i) {
1154             $line = trim($body[$i]);
1155             if (($mime_header || $rfc822_header) &&
1156                 (preg_match("/^.*boundary=\"?(.+(?=\")|.+).*/i", $line, $reg))) {
1157                 $bnd = $reg[1];
1158                 $bndreg = $bnd;
1159                 $bndreg = str_replace("\\", "\\\\", $bndreg);
1160                 $bndreg = str_replace("?", "\\?", $bndreg);
1161                 $bndreg = str_replace("+", "\\+", $bndreg);
1162                 $bndreg = str_replace(".", "\\.", $bndreg);
1163                 $bndreg = str_replace("/", "\\/", $bndreg);
1164                 $bndreg = str_replace("-", "\\-", $bndreg);
1165                 $bndreg = str_replace("(", "\\(", $bndreg);
1166                 $bndreg = str_replace(")", "\\)", $bndreg);
1167             } else if ($rfc822_header && $line == '') {
1168                 $rfc822_header = false;
1169                 if ($msg->type0 == 'multipart') {
1170                     $mime_header = true;
1171                 }
1172             }
1173
1174             if ((($line{0} == '-') || $rfc822_header)  && isset($boundaries[0])) {
1175                 $cnt=count($boundaries)-1;
1176                 $bnd = $boundaries[$cnt]['bnd'];
1177                 $bndreg = $boundaries[$cnt]['bndreg'];
1178
1179                 $regstr = '/^--'."($bndreg)".".*".'/';
1180                 if (preg_match($regstr, $line, $reg)) {
1181                     $bndlen = strlen($reg[1]);
1182                     $bndend = false;
1183                     if (strlen($line) > ($bndlen + 3)) {
1184                         if (($line{$bndlen+2} == '-') && ($line{$bndlen+3} == '-')) {
1185                             $bndend = true;
1186                         }
1187                     }
1188                     if ($bndend) {
1189                         /* calc offset and return $msg */
1190                         //$entStr = CalcEntity("$entStr", -1);
1191                         array_pop($boundaries);
1192                         $mime_header = true;
1193                         $bnd_end = true;
1194                     } else {
1195                         $mime_header = true;
1196                          $bnd_end = false;
1197                         //$entStr = CalcEntity("$entStr", 0);
1198                         ++$content_indx;
1199                     }
1200                 } else {
1201                     if ($header) { }
1202                 }
1203             }
1204         }
1205     }
1206
1207     function findDisplayEntity($entity = array(), $alt_order = array('text/plain', 'text/html'), $strict=false) {
1208         $found = false;
1209         if ($this->type0 == 'multipart') {
1210             if($this->type1 == 'alternative') {
1211                 $msg = $this->findAlternativeEntity($alt_order);
1212                 if (count($msg->entities) == 0) {
1213                     $entity[] = $msg->entity_id;
1214                 } else {
1215                     $entity = $msg->findDisplayEntity($entity, $alt_order, $strict);
1216                 }
1217                 $found = true;
1218             } else if ($this->type1 == 'related') { /* RFC 2387 */
1219                 $msgs = $this->findRelatedEntity();
1220                 foreach ($msgs as $msg) {
1221                     if (count($msg->entities) == 0) {
1222                         $entity[] = $msg->entity_id;
1223                     } else {
1224                         $entity = $msg->findDisplayEntity($entity, $alt_order, $strict);
1225                     }
1226                 }
1227                 if (count($msgs) > 0) {
1228                     $found = true;
1229                 }
1230             } else { /* Treat as multipart/mixed */
1231                 foreach ($this->entities as $ent) {
1232                     if(strtolower($ent->header->disposition->name) != 'attachment' &&
1233                        ($ent->type0 != 'message' && $ent->type1 != 'rfc822'))
1234                     {
1235                         $entity = $ent->findDisplayEntity($entity, $alt_order, $strict);
1236                         $found = true;
1237                     }
1238                 }
1239             }
1240         } else { /* If not multipart, then just compare with each entry from $alt_order */
1241             $type = $this->type0.'/'.$this->type1;
1242             foreach ($alt_order as $alt) {
1243                 if( ($alt == $type) && isset($this->entity_id) ) {
1244                     if ( (count($this->entities) == 0) &&
1245                          (strtolower($this->header->disposition->name) != 'attachment') )
1246                     {
1247                             $entity[] = $this->entity_id;
1248                             $found = true;
1249                     }
1250                 }
1251             }
1252         }
1253         if(!$found) {
1254             foreach ($this->entities as $ent) {
1255                 if((strtolower($ent->header->disposition->name) != 'attachment') &&
1256                    (($ent->type0 != 'message') && ($ent->type1 != 'rfc822'))) {
1257                     $entity = $ent->findDisplayEntity($entity, $alt_order, $strict);
1258                     $found = true;
1259                 }
1260             }
1261         }
1262         if(!$strict && !$found) {
1263             if ($this->type0 == 'text' &&
1264                 ($this->type1 == 'plain' ||
1265                  $this->type1 == 'html'  ||
1266                  $this->type1 == 'message') &&
1267                 isset($this->entity_id) )
1268             {
1269                 if (count($this->entities) == 0) {
1270                     if (strtolower($this->header->disposition->name) != 'attachment') {
1271                         $entity[] = $this->entity_id;
1272                     }
1273                 }
1274             }
1275         }
1276
1277         return $entity;
1278     }
1279
1280     function findAlternativeEntity($alt_order) {
1281         /* If we are dealing with alternative parts then we  */
1282         /* choose the best viewable message supported by SM. */
1283         $best_view = 0;
1284         $entity = array();
1285         $altcount = count($alt_order);
1286
1287         foreach($this->entities as $ent) {
1288             $type = $ent->header->type0 . '/' . $ent->header->type1;
1289             if ($type == 'multipart/related') {
1290                 $type = $ent->header->getParameter('type');
1291             }
1292             for ($j = $best_view; $j < $altcount; ++$j) {
1293                 if (($alt_order[$j] == $type) && ($j >= $best_view)) {
1294                     $best_view = $j;
1295                     $entity = $ent;
1296                 }
1297             }
1298         }
1299
1300         return $entity;
1301     }
1302
1303     function findRelatedEntity() {
1304         $msgs = array();
1305         $entcount = count($this->entities);
1306
1307         for ($i = 0; $i < $entcount; ++$i) {
1308             $type = $this->entities[$i]->header->type0.'/'.$this->entities[$i]->header->type1;
1309             if ($this->header->getParameter('type') == $type) {
1310                 $msgs[] = $this->entities[$i];
1311             }
1312         }
1313
1314         return $msgs;
1315     }
1316
1317     function getAttachments($exclude_id=array(), $result = array()) {
1318         if (($this->type0 == 'message') && ($this->type1 == 'rfc822')) {
1319             $this = $this->entities[0];
1320         }
1321
1322         if (count($this->entities)) {
1323             foreach ($this->entities as $entity) {
1324                 $exclude = false;
1325
1326                 foreach ($exclude_id as $excl) {
1327                     if ($entity->entity_id === $excl) {
1328                         $exclude = true;
1329                     }
1330                 }
1331
1332                 if (!$exclude) {
1333                     if (($entity->type0 == 'multipart') &&
1334                         ($entity->type1 != 'related')) {
1335                         $result = $entity->getAttachments($exclude_id, $result);
1336                     } else if ($entity->type0 != 'multipart') {
1337                         $result[] = $entity;
1338                     }
1339                 }
1340             }
1341         } else {
1342             $exclude = false;
1343             foreach ($exclude_id as $excl) {
1344                 $exclude = $exclude || ($this->entity_id == $excl);
1345             }
1346
1347             if (!$exclude) {
1348                 $result[] = $this;
1349             }
1350         }
1351
1352         return $result;
1353     }
1354 }
1355
1356 class smime_message {
1357
1358 }
1359
1360 class disposition {
1361     function disposition($name) {
1362        $this->name = $name;
1363        $this->properties = array();
1364     }
1365
1366     function getProperty($par) {
1367         $value = strtolower($par);
1368         if (isset($this->properties[$par])) {
1369             return $this->properties[$par];
1370         }
1371         return '';
1372     }
1373 }
1374
1375 class language {
1376     function language($name) {
1377        $this->name = $name;
1378        $this->properties = array();
1379     }
1380 }
1381
1382 class content_type {
1383     var $type0      = 'text',
1384         $type1      = 'plain',
1385         $properties = '';
1386
1387     function content_type($type) {
1388         $pos = strpos($type, '/');
1389         if ($pos > 0) {
1390             $this->type0 = substr($type, 0, $pos);
1391             $this->type1 = substr($type, $pos+1);
1392         } else {
1393             $this->type0 = $type;
1394         }
1395         $this->properties = array();
1396     }
1397 }
1398
1399 ?>