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[squirrelmail.git] / functions / mime.php
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59177427 1<?php
2ba13803 2
35586184 3/**
4 * mime.php
5 *
76911253 6 * Copyright (c) 1999-2003 The SquirrelMail Project Team
35586184 7 * Licensed under the GNU GPL. For full terms see the file COPYING.
8 *
9 * This contains the functions necessary to detect and decode MIME
10 * messages.
11 *
12 * $Id$
d6c32258 13 * @package squirrelmail
35586184 14 */
b74ba498 15
d6c32258 16/** The typical includes... */
b68edc75 17require_once(SM_PATH . 'functions/imap.php');
18require_once(SM_PATH . 'functions/attachment_common.php');
8beafbbc 19
7c7b74b3 20/* -------------------------------------------------------------------------- */
21/* MIME DECODING */
22/* -------------------------------------------------------------------------- */
b74ba498 23
d6c32258 24/**
25 * Get the MIME structure
07c49f57 26 *
d6c32258 27 * This function gets the structure of a message and stores it in the "message" class.
451f74a2 28 * It will return this object for use with all relevant header information and
29 * fully parsed into the standard "message" object format.
30 */
a4a70693 31function mime_structure ($bodystructure, $flags=array()) {
c9d78ab4 32
3d8371be 33 /* Isolate the body structure and remove beginning and end parenthesis. */
a4a70693 34 $read = trim(substr ($bodystructure, strpos(strtolower($bodystructure), 'bodystructure') + 13));
451f74a2 35 $read = trim(substr ($read, 0, -1));
22efa9fb 36 $i = 0;
37 $msg = Message::parseStructure($read,$i);
9de42168 38 if (!is_object($msg)) {
bd9c880b 39 include_once(SM_PATH . 'functions/display_messages.php');
3d8371be 40 global $color, $mailbox;
c96c32f4 41 /* removed urldecode because $_GET is auto urldecoded ??? */
a48eba8f 42 displayPageHeader( $color, $mailbox );
5e8de8b6 43 $errormessage = _("SquirrelMail could not decode the bodystructure of the message");
3d8371be 44 $errormessage .= '<BR>'._("the provided bodystructure by your imap-server").':<BR><BR>';
472e7acb 45 $errormessage .= '<pre>' . htmlspecialchars($read) . '</pre>';
9de42168 46 plain_error_message( $errormessage, $color );
3d8371be 47 echo '</body></html>';
9de42168 48 exit;
49 }
a4a70693 50 if (count($flags)) {
7a9e9c89 51 foreach ($flags as $flag) {
52 $char = strtoupper($flag{1});
53 switch ($char) {
3d8371be 54 case 'S':
55 if (strtolower($flag) == '\\seen') {
56 $msg->is_seen = true;
57 }
58 break;
59 case 'A':
60 if (strtolower($flag) == '\\answered') {
61 $msg->is_answered = true;
62 }
63 break;
64 case 'D':
65 if (strtolower($flag) == '\\deleted') {
66 $msg->is_deleted = true;
67 }
68 break;
69 case 'F':
70 if (strtolower($flag) == '\\flagged') {
71 $msg->is_flagged = true;
72 }
73 break;
74 case 'M':
75 if (strtolower($flag) == '$mdnsent') {
76 $msg->is_mdnsent = true;
77 }
78 break;
79 default:
80 break;
7a9e9c89 81 }
82 }
451f74a2 83 }
7a9e9c89 84 // listEntities($msg);
3d8371be 85 return $msg;
451f74a2 86}
b74ba498 87
22efa9fb 88
89
3d8371be 90/* This starts the parsing of a particular structure. It is called recursively,
451f74a2 91 * so it can be passed different structures. It returns an object of type
92 * $message.
93 * First, it checks to see if it is a multipart message. If it is, then it
94 * handles that as it sees is necessary. If it is just a regular entity,
95 * then it parses it and adds the necessary header information (by calling out
96 * to mime_get_elements()
97 */
451f74a2 98
4d592352 99function mime_fetch_body($imap_stream, $id, $ent_id=1, $fetch_size=0) {
da2415c1 100 global $uid_support;
3d8371be 101 /* Do a bit of error correction. If we couldn't find the entity id, just guess
09a4bde3 102 * that it is the first one. That is usually the case anyway.
103 */
7c7b74b3 104
09a4bde3 105 if (!$ent_id) {
08b7f7cc 106 $cmd = "FETCH $id BODY[]";
1035e159 107 } else {
08b7f7cc 108 $cmd = "FETCH $id BODY[$ent_id]";
09a4bde3 109 }
3d8371be 110
4d592352 111 if ($fetch_size!=0) $cmd .= "<0.$fetch_size>";
da2415c1 112
a4a70693 113 $data = sqimap_run_command ($imap_stream, $cmd, true, $response, $message, $uid_support);
77b88425 114 do {
3d8371be 115 $topline = trim(array_shift($data));
116 } while($topline && ($topline[0] == '*') && !preg_match('/\* [0-9]+ FETCH.*/i', $topline)) ;
a4a70693 117
451f74a2 118 $wholemessage = implode('', $data);
119 if (ereg('\\{([^\\}]*)\\}', $topline, $regs)) {
3d8371be 120 $ret = substr($wholemessage, 0, $regs[1]);
121 /* There is some information in the content info header that could be important
122 * in order to parse html messages. Let's get them here.
123 */
0600bdf1 124// if ($ret{0} == '<') {
125// $data = sqimap_run_command ($imap_stream, "FETCH $id BODY[$ent_id.MIME]", true, $response, $message, $uid_support);
126// }
451f74a2 127 } else if (ereg('"([^"]*)"', $topline, $regs)) {
128 $ret = $regs[1];
129 } else {
130 global $where, $what, $mailbox, $passed_id, $startMessage;
3d8371be 131 $par = 'mailbox=' . urlencode($mailbox) . '&amp;passed_id=' . $passed_id;
451f74a2 132 if (isset($where) && isset($what)) {
3d8371be 133 $par .= '&amp;where=' . urlencode($where) . '&amp;what=' . urlencode($what);
a3daaaf3 134 } else {
3d8371be 135 $par .= '&amp;startMessage=' . $startMessage . '&amp;show_more=0';
451f74a2 136 }
e5ea9327 137 $par .= '&amp;response=' . urlencode($response) .
3d8371be 138 '&amp;message=' . urlencode($message) .
139 '&amp;topline=' . urlencode($topline);
a019eeb8 140
346817d4 141 echo '<tt><br>' .
142 '<table width="80%"><tr>' .
143 '<tr><td colspan=2>' .
0e5b61b4 144 _("Body retrieval error. The reason for this is most probably that the message is malformed.") .
346817d4 145 '</td></tr>' .
0e5b61b4 146 '<tr><td><b>' . _("Command:") . "</td><td>$cmd</td></tr>" .
147 '<tr><td><b>' . _("Response:") . "</td><td>$response</td></tr>" .
148 '<tr><td><b>' . _("Message:") . "</td><td>$message</td></tr>" .
149 '<tr><td><b>' . _("FETCH line:") . "</td><td>$topline</td></tr>" .
346817d4 150 "</table><BR></tt></font><hr>";
151
a4a70693 152 $data = sqimap_run_command ($imap_stream, "FETCH $passed_id BODY[]", true, $response, $message, $uid_support);
451f74a2 153 array_shift($data);
154 $wholemessage = implode('', $data);
a019eeb8 155
346817d4 156 $ret = $wholemessage;
a3daaaf3 157 }
3d8371be 158 return $ret;
451f74a2 159}
d4467150 160
1035e159 161function mime_print_body_lines ($imap_stream, $id, $ent_id=1, $encoding) {
a4a70693 162 global $uid_support;
1035e159 163
3d8371be 164 /* Don't kill the connection if the browser is over a dialup
165 * and it would take over 30 seconds to download it.
7e6ca3e8 166 * Dont call set_time_limit in safe mode.
3d8371be 167 */
b7206e1d 168
3d8371be 169 if (!ini_get('safe_mode')) {
b7206e1d 170 set_time_limit(0);
171 }
7c7b74b3 172 /* in case of base64 encoded attachments, do not buffer them.
173 Instead, echo the decoded attachment directly to screen */
174 if (strtolower($encoding) == 'base64') {
175 if (!$ent_id) {
176 $query = "FETCH $id BODY[]";
177 } else {
178 $query = "FETCH $id BODY[$ent_id]";
179 }
180 sqimap_run_command($imap_stream,$query,true,$response,$message,$uid_support,'sqimap_base64_decode','php://stdout',true);
1d142b8d 181 } else {
7c7b74b3 182 $body = mime_fetch_body ($imap_stream, $id, $ent_id);
183 echo decodeBody($body, $encoding);
1d142b8d 184 }
346817d4 185
da2415c1 186 /*
7c7b74b3 187 TODO, use the same method for quoted printable.
188 However, I assume that quoted printable attachments aren't that large
189 so the performancegain / memory usage drop will be minimal.
190 If we decide to add that then we need to adapt sqimap_fread because
da2415c1 191 we need to split te result on \n and fread doesn't stop at \n. That
7c7b74b3 192 means we also should provide $results from sqimap_fread (by ref) to
193 te function and set $no_return to false. The $filter function for
da2415c1 194 quoted printable should handle unsetting of $results.
7c7b74b3 195 */
da2415c1 196 /*
7c7b74b3 197 TODO 2: find out how we write to the output stream php://stdout. fwrite
198 doesn't work because 'php://stdout isn't a stream.
199 */
200
5d9c6f73 201 return;
202/*
451f74a2 203 fputs ($imap_stream, "$sid FETCH $id BODY[$ent_id]\r\n");
204 $cnt = 0;
205 $continue = true;
1d142b8d 206 $read = fgets ($imap_stream,8192);
207
208
451f74a2 209 // This could be bad -- if the section has sqimap_session_id() . ' OK'
210 // or similar, it will kill the download.
1d142b8d 211 while (!ereg("^".$sid_s." (OK|BAD|NO)(.*)$", $read, $regs)) {
5d9c6f73 212 if (trim($read) == ')==') {
213 $read1 = $read;
214 $read = fgets ($imap_stream,4096);
215 if (ereg("^".$sid." (OK|BAD|NO)(.*)$", $read, $regs)) {
216 return;
217 } else {
218 echo decodeBody($read1, $encoding) .
219 decodeBody($read, $encoding);
220 }
221 } else if ($cnt) {
222 echo decodeBody($read, $encoding);
223 }
224 $read = fgets ($imap_stream,4096);
225 $cnt++;
1d142b8d 226// break;
451f74a2 227 }
5d9c6f73 228*/
451f74a2 229}
beb9e459 230
451f74a2 231/* -[ END MIME DECODING ]----------------------------------------------------------- */
d4467150 232
3d8371be 233/* This is here for debugging purposes. It will print out a list
234 * of all the entity IDs that are in the $message object.
235 */
451f74a2 236function listEntities ($message) {
3d8371be 237 if ($message) {
238 echo "<tt>" . $message->entity_id . ' : ' . $message->type0 . '/' . $message->type1 . ' parent = '. $message->parent->entity_id. '<br>';
239 for ($i = 0; isset($message->entities[$i]); $i++) {
240 echo "$i : ";
241 $msg = listEntities($message->entities[$i]);
242
243 if ($msg) {
244 echo "return: ";
245 return $msg;
246 }
247 }
a4a70693 248 }
451f74a2 249}
f0c4dc12 250
f792c641 251function getPriorityStr($priority) {
3d8371be 252 $priority_level = substr($priority,0,1);
253
254 switch($priority_level) {
255 /* Check for a higher then normal priority. */
256 case '1':
257 case '2':
258 $priority_string = _("High");
259 break;
260
261 /* Check for a lower then normal priority. */
262 case '4':
263 case '5':
264 $priority_string = _("Low");
265 break;
266
267 /* Check for a normal priority. */
268 case '3':
269 default:
270 $priority_level = '3';
271 $priority_string = _("Normal");
272 break;
273
274 }
275 return $priority_string;
f792c641 276}
277
451f74a2 278/* returns a $message object for a particular entity id */
279function getEntity ($message, $ent_id) {
a4a70693 280 return $message->getEntity($ent_id);
451f74a2 281}
8beafbbc 282
3d8371be 283/* translateText
da4c66e8 284 * Extracted from strings.php 23/03/2002
285 */
286
287function translateText(&$body, $wrap_at, $charset) {
3d8371be 288 global $where, $what; /* from searching */
289 global $color; /* color theme */
da4c66e8 290
b68edc75 291 require_once(SM_PATH . 'functions/url_parser.php');
da4c66e8 292
293 $body_ary = explode("\n", $body);
da4c66e8 294 for ($i=0; $i < count($body_ary); $i++) {
295 $line = $body_ary[$i];
296 if (strlen($line) - 2 >= $wrap_at) {
297 sqWordWrap($line, $wrap_at);
298 }
299 $line = charset_decode($charset, $line);
300 $line = str_replace("\t", ' ', $line);
301
302 parseUrl ($line);
303
3d8371be 304 $quotes = 0;
da4c66e8 305 $pos = 0;
3d8371be 306 $j = strlen($line);
da4c66e8 307
3d8371be 308 while ($pos < $j) {
da4c66e8 309 if ($line[$pos] == ' ') {
3d8371be 310 $pos++;
da4c66e8 311 } else if (strpos($line, '&gt;', $pos) === $pos) {
312 $pos += 4;
3d8371be 313 $quotes++;
da4c66e8 314 } else {
315 break;
316 }
317 }
3d8371be 318
83c94382 319 if ($quotes % 2) {
3d8371be 320 if (!isset($color[13])) {
da4c66e8 321 $color[13] = '#800000';
322 }
4c25967c 323 $line = '<font color="' . $color[13] . '">' . $line . '</font>';
324 } elseif ($quotes) {
325 if (!isset($color[14])) {
326 $color[14] = '#FF0000';
327 }
328 $line = '<font color="' . $color[14] . '">' . $line . '</font>';
da4c66e8 329 }
3d8371be 330
da4c66e8 331 $body_ary[$i] = $line;
332 }
333 $body = '<pre>' . implode("\n", $body_ary) . '</pre>';
334}
335
451f74a2 336/* This returns a parsed string called $body. That string can then
3d8371be 337 * be displayed as the actual message in the HTML. It contains
338 * everything needed, including HTML Tags, Attachments at the
339 * bottom, etc.
340 */
b3af12ef 341function formatBody($imap_stream, $message, $color, $wrap_at, $ent_num, $id, $mailbox='INBOX') {
3d8371be 342 /* This if statement checks for the entity to show as the
343 * primary message. To add more of them, just put them in the
344 * order that is their priority.
345 */
008989da 346 global $startMessage, $username, $key, $imapServerAddress, $imapPort,
23f617b8 347 $show_html_default, $sort, $has_unsafe_images, $passed_ent_id;
08b7f7cc 348 global $languages, $squirrelmail_language;
77bfbd2e 349
5262d9a6 350 if( !sqgetGlobalVar('view_unsafe_images', $view_unsafe_images, SQ_GET) ) {
351 $view_unsafe_images = false;
77bfbd2e 352 }
d03c24f4 353
cc34b00d 354 $body = '';
23bcec6f 355 $urlmailbox = urlencode($mailbox);
451f74a2 356 $body_message = getEntity($message, $ent_num);
357 if (($body_message->header->type0 == 'text') ||
358 ($body_message->header->type0 == 'rfc822')) {
3d8371be 359 $body = mime_fetch_body ($imap_stream, $id, $ent_num);
451f74a2 360 $body = decodeBody($body, $body_message->header->encoding);
e842b215 361
362 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
363 function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
364 if (mb_detect_encoding($body) != 'ASCII') {
365 $body = $languages[$squirrelmail_language]['XTRA_CODE']('decode', $body);
366 }
367 }
451f74a2 368 $hookResults = do_hook("message_body", $body);
369 $body = $hookResults[1];
23bcec6f 370
3d8371be 371 /* If there are other types that shouldn't be formatted, add
372 * them here.
373 */
374
451f74a2 375 if ($body_message->header->type1 == 'html') {
3d8371be 376 if ($show_html_default <> 1) {
85015544 377 $entity_conv = array('&nbsp;' => ' ',
3d8371be 378 '<p>' => "\n",
379 '<br>' => "\n",
380 '<P>' => "\n",
381 '<BR>' => "\n",
85015544 382 '&gt;' => '>',
383 '&lt;' => '<');
85015544 384 $body = strtr($body, $entity_conv);
3d8371be 385 $body = strip_tags($body);
85015544 386 $body = trim($body);
387 translateText($body, $wrap_at,
807e884a 388 $body_message->header->getParameter('charset'));
a3daaaf3 389 } else {
3d8371be 390 $body = magicHTML($body, $id, $message, $mailbox);
a3daaaf3 391 }
451f74a2 392 } else {
3d8371be 393 translateText($body, $wrap_at,
394 $body_message->header->getParameter('charset'));
451f74a2 395 }
83cf04bd 396 $link = 'passed_id=' . $id . '&amp;ent_id='.$ent_num.
08b7f7cc 397 '&amp;mailbox=' . $urlmailbox .'&amp;sort=' . $sort .
da2415c1 398 '&amp;startMessage=' . $startMessage . '&amp;show_more=0';
08b7f7cc 399 if (isset($passed_ent_id)) {
400 $link .= '&amp;passed_ent_id='.$passed_ent_id;
401 }
83cf04bd 402 $body .= '<center><small><a href="download.php?absolute_dl=true&amp;' .
403 $link . '">' . _("Download this as a file") . '</a>';
7aad7b77 404 if ($view_unsafe_images) {
23f617b8 405 $text = _("Hide Unsafe Images");
7aad7b77 406 } else {
08b7f7cc 407 if (isset($has_unsafe_images) && $has_unsafe_images) {
408 $link .= '&amp;view_unsafe_images=1';
409 $text = _("View Unsafe Images");
410 } else {
411 $text = '';
412 }
3d8371be 413 }
83cf04bd 414 if($text != '') {
415 $body .= '&nbsp;|&nbsp;<a href="read_body.php?' . $link . '">' . $text . '</a>';
416 }
417 $body .= '</small></center><br>' . "\n";
3d8371be 418 }
419 return $body;
451f74a2 420}
b74ba498 421
23bcec6f 422
423function formatAttachments($message, $exclude_id, $mailbox, $id) {
b583c3e8 424 global $where, $what, $startMessage, $color;
77b88425 425 static $ShownHTML = 0;
451f74a2 426
23bcec6f 427 $att_ar = $message->getAttachments($exclude_id);
451f74a2 428
23bcec6f 429 if (!count($att_ar)) return '';
2e25760a 430
8f5425ec 431 $attachments = '';
2e25760a 432
23bcec6f 433 $urlMailbox = urlencode($mailbox);
434
435 foreach ($att_ar as $att) {
fdc9d9b5 436 $ent = $att->entity_id;
2e25760a 437 $header = $att->header;
f0c4dc12 438 $type0 = strtolower($header->type0);
439 $type1 = strtolower($header->type1);
2e25760a 440 $name = '';
3d8371be 441 $links['download link']['text'] = _("download");
6b04287c 442 $links['download link']['href'] = SM_PATH .
443 "src/download.php?absolute_dl=true&amp;passed_id=$id&amp;mailbox=$urlMailbox&amp;ent_id=$ent";
2e25760a 444 $ImageURL = '';
445 if ($type0 =='message' && $type1 == 'rfc822') {
6b04287c 446 $default_page = SM_PATH . 'src/read_body.php';
2e25760a 447 $rfc822_header = $att->rfc822_header;
098ea084 448 $filename = $rfc822_header->subject;
6cc08d8b 449 if (trim( $filename ) == '') {
450 $filename = 'untitled-[' . $ent . ']' ;
08b7f7cc 451 }
2e25760a 452 $from_o = $rfc822_header->from;
453 if (is_object($from_o)) {
04ea844e 454 $from_name = decodeHeader($from_o->getAddress(false));
2e25760a 455 } else {
456 $from_name = _("Unknown sender");
f0c4dc12 457 }
3d8371be 458 $description = $from_name;
23bcec6f 459 } else {
6b04287c 460 $default_page = SM_PATH . 'src/download.php';
3d8371be 461 if (is_object($header->disposition)) {
098ea084 462 $filename = $header->disposition->getProperty('filename');
3d8371be 463 if (trim($filename) == '') {
464 $name = decodeHeader($header->disposition->getProperty('name'));
465 if (trim($name) == '') {
098ea084 466 $name = $header->getParameter('name');
1035e159 467 if(trim($name) == '') {
468 if (trim( $header->id ) == '') {
469 $filename = 'untitled-[' . $ent . ']' ;
470 } else {
471 $filename = 'cid: ' . $header->id;
08b7f7cc 472 }
3d8371be 473 } else {
08b7f7cc 474 $filename = $name;
3d8371be 475 }
476 } else {
477 $filename = $name;
478 }
479 }
480 } else {
08b7f7cc 481 $filename = $header->getParameter('name');
482 if (!trim($filename)) {
483 if (trim( $header->id ) == '') {
484 $filename = 'untitled-[' . $ent . ']' ;
485 } else {
486 $filename = 'cid: ' . $header->id;
487 }
488 }
489 }
f810c0b2 490 if ($header->description) {
098ea084 491 $description = decodeHeader($header->description);
f810c0b2 492 } else {
3d8371be 493 $description = '';
494 }
2e25760a 495 }
496
497 $display_filename = $filename;
3d8371be 498 if (isset($passed_ent_id)) {
499 $passed_ent_id_link = '&amp;passed_ent_id='.$passed_ent_id;
500 } else {
501 $passed_ent_id_link = '';
502 }
503 $defaultlink = $default_page . "?startMessage=$startMessage"
2e25760a 504 . "&amp;passed_id=$id&amp;mailbox=$urlMailbox"
6b04287c 505 . '&amp;ent_id='.$ent.$passed_ent_id_link;
2e25760a 506 if ($where && $what) {
09f4707e 507 $defaultlink .= '&amp;where='. urlencode($where).'&amp;what='.urlencode($what);
2e25760a 508 }
3d8371be 509 /* This executes the attachment hook with a specific MIME-type.
510 * If that doesn't have results, it tries if there's a rule
511 * for a more generic type.
512 */
513 $hookresults = do_hook("attachment $type0/$type1", $links,
514 $startMessage, $id, $urlMailbox, $ent, $defaultlink,
515 $display_filename, $where, $what);
516 if(count($hookresults[1]) <= 1) {
517 $hookresults = do_hook("attachment $type0/*", $links,
518 $startMessage, $id, $urlMailbox, $ent, $defaultlink,
519 $display_filename, $where, $what);
2e25760a 520 }
451f74a2 521
3d8371be 522 $links = $hookresults[1];
523 $defaultlink = $hookresults[6];
77b88425 524
2e25760a 525 $attachments .= '<TR><TD>' .
098ea084 526 '<A HREF="'.$defaultlink.'">'.decodeHeader($display_filename).'</A>&nbsp;</TD>' .
23bcec6f 527 '<TD><SMALL><b>' . show_readable_size($header->size) .
77b88425 528 '</b>&nbsp;&nbsp;</small></TD>' .
529 "<TD><SMALL>[ $type0/$type1 ]&nbsp;</SMALL></TD>" .
530 '<TD><SMALL>';
f810c0b2 531 $attachments .= '<b>' . $description . '</b>';
2e25760a 532 $attachments .= '</SMALL></TD><TD><SMALL>&nbsp;';
b74ba498 533
3d8371be 534 $skipspaces = 1;
535 foreach ($links as $val) {
536 if ($skipspaces) {
537 $skipspaces = 0;
2e25760a 538 } else {
539 $attachments .= '&nbsp;&nbsp;|&nbsp;&nbsp;';
77b88425 540 }
3d8371be 541 $attachments .= '<a href="' . $val['href'] . '">' . $val['text'] . '</a>';
2e25760a 542 }
3d8371be 543 unset($links);
2e25760a 544 $attachments .= "</TD></TR>\n";
545 }
9ad17edb 546 $attachmentadd = do_hook_function('attachments_bottom',$attachments);
547 if ($attachmentadd != '')
548 $attachments = $attachmentadd;
2e25760a 549 return $attachments;
451f74a2 550}
b74ba498 551
7c7b74b3 552function sqimap_base64_decode(&$string) {
325978ac 553 $string = str_replace("\r\n", "\n", $string);
7c7b74b3 554 $string = base64_decode($string);
555}
556
3d8371be 557/* This function decodes the body depending on the encoding type. */
451f74a2 558function decodeBody($body, $encoding) {
3d8371be 559 global $show_html_default;
83be314a 560
b583c3e8 561 $body = str_replace("\r\n", "\n", $body);
562 $encoding = strtolower($encoding);
3d8371be 563
5166f86a 564 $encoding_handler = do_hook_function('decode_body', $encoding);
565
566
567 // plugins get first shot at decoding the body
568 //
569 if (!empty($encoding_handler) && function_exists($encoding_handler)) {
570 $body = $encoding_handler('decode', $body);
571
572 } else if ($encoding == 'quoted-printable' ||
3d8371be 573 $encoding == 'quoted_printable') {
b583c3e8 574 $body = quoted_printable_decode($body);
3d8371be 575
b583c3e8 576 while (ereg("=\n", $body)) {
577 $body = ereg_replace ("=\n", '', $body);
578 }
3d8371be 579
b583c3e8 580 } else if ($encoding == 'base64') {
581 $body = base64_decode($body);
582 }
3d8371be 583
b583c3e8 584 // All other encodings are returned raw.
3d8371be 585 return $body;
451f74a2 586}
587
588/*
589 * This functions decode strings that is encoded according to
590 * RFC1522 (MIME Part Two: Message Header Extensions for Non-ASCII Text).
79e07c7e 591 * Patched by Christian Schmidt <christian@ostenfeld.dk> 23/03/2002
451f74a2 592 */
098ea084 593function decodeHeader ($string, $utfencode=true,$htmlsave=true) {
d7448126 594 global $languages, $squirrelmail_language;
79e07c7e 595 if (is_array($string)) {
596 $string = implode("\n", $string);
597 }
da2415c1 598
10dec454 599 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
600 function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
6fbd125b 601 $string = $languages[$squirrelmail_language]['XTRA_CODE']('decodeheader', $string);
08b7f7cc 602 // Do we need to return at this point?
603 // return $string;
83be314a 604 }
79e07c7e 605 $i = 0;
08b7f7cc 606 $iLastMatch = -2;
db65b6b0 607 $encoded = true;
0a06275a 608
098ea084 609 $aString = explode(' ',$string);
08b7f7cc 610 $ret = '';
098ea084 611 foreach ($aString as $chunk) {
358a78a1 612 if ($encoded && $chunk === '') {
08b7f7cc 613 continue;
358a78a1 614 } elseif ($chunk === '') {
08b7f7cc 615 $ret .= ' ';
616 continue;
617 }
098ea084 618 $encoded = false;
08b7f7cc 619 /* if encoded words are not separated by a linear-space-white we still catch them */
620 $j = $i-1;
7e6ca3e8 621
08b7f7cc 622 while ($match = preg_match('/^(.*)=\?([^?]*)\?(Q|B)\?([^?]*)\?=(.*)$/Ui',$chunk,$res)) {
623 /* if the last chunk isn't an encoded string then put back the space, otherwise don't */
624 if ($iLastMatch !== $j) {
625 if ($htmlsave) {
626 $ret .= '&nbsp;';
627 } else {
628 $ret .= ' ';
629 }
630 }
631 $iLastMatch = $i;
632 $j = $i;
633 $ret .= $res[1];
098ea084 634 $encoding = ucfirst($res[3]);
635 switch ($encoding)
636 {
637 case 'B':
638 $replace = base64_decode($res[4]);
08b7f7cc 639 $ret .= charset_decode($res[2],$replace);
098ea084 640 break;
641 case 'Q':
098ea084 642 $replace = str_replace('_', ' ', $res[4]);
da2415c1 643 $replace = preg_replace('/=([0-9a-f]{2})/ie', 'chr(hexdec("\1"))',
79e07c7e 644 $replace);
098ea084 645 /* Only encode into entities by default. Some places
646 * don't need the encoding, like the compose form.
647 */
648 if ($utfencode) {
649 $replace = charset_decode($res[2], $replace);
650 } else {
651 if ($htmlsave) {
c96c32f4 652 $replace = htmlspecialchars($replace);
098ea084 653 }
654 }
08b7f7cc 655 $ret .= $replace;
098ea084 656 break;
657 default:
658 break;
79e07c7e 659 }
098ea084 660 $chunk = $res[5];
661 $encoded = true;
08b7f7cc 662 }
7e6ca3e8 663
664 if (!$encoded && $htmlsave) {
665 $ret .= htmlspecialchars($chunk);
666 } else {
667 $ret .= $chunk;
668 }
669
08b7f7cc 670 if (!$encoded) {
671 if ($htmlsave) {
672 $ret .= '&nbsp;';
673 } else {
674 $ret .= ' ';
da2415c1 675 }
08b7f7cc 676 }
098ea084 677 ++$i;
678 }
da2415c1 679
08b7f7cc 680 return $ret;
451f74a2 681}
682
683/*
684 * Encode a string according to RFC 1522 for use in headers if it
685 * contains 8-bit characters or anything that looks like it should
686 * be encoded.
687 */
688function encodeHeader ($string) {
6fbd125b 689 global $default_charset, $languages, $squirrelmail_language;
83be314a 690
10dec454 691 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
692 function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
6fbd125b 693 return $languages[$squirrelmail_language]['XTRA_CODE']('encodeheader', $string);
83be314a 694 }
c96c32f4 695 if (strtolower($default_charset) == 'iso-8859-1') {
696 $string = str_replace("\240",' ',$string);
697 }
793cc001 698
451f74a2 699 // Encode only if the string contains 8-bit characters or =?
3d8371be 700 $j = strlen($string);
098ea084 701 $max_l = 75 - strlen($default_charset) - 7;
702 $aRet = array();
451f74a2 703 $ret = '';
c96c32f4 704 $iEncStart = $enc_init = false;
0d53f0f9 705 $cur_l = $iOffset = 0;
3d8371be 706 for($i = 0; $i < $j; ++$i) {
c96c32f4 707 switch($string{$i})
708 {
709 case '=':
710 case '<':
711 case '>':
712 case ',':
713 case '?':
714 case '_':
715 if ($iEncStart === false) {
716 $iEncStart = $i;
717 }
718 $cur_l+=3;
719 if ($cur_l > ($max_l-2)) {
08b7f7cc 720 /* if there is an stringpart that doesn't need encoding, add it */
c96c32f4 721 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
722 $aRet[] = "=?$default_charset?Q?$ret?=";
723 $iOffset = $i;
724 $cur_l = 0;
725 $ret = '';
726 $iEncStart = false;
727 } else {
728 $ret .= sprintf("=%02X",ord($string{$i}));
729 }
730 break;
731 case '(':
732 case ')':
733 if ($iEncStart !== false) {
08b7f7cc 734 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
c96c32f4 735 $aRet[] = "=?$default_charset?Q?$ret?=";
736 $iOffset = $i;
737 $cur_l = 0;
738 $ret = '';
739 $iEncStart = false;
740 }
741 break;
742 case ' ':
743 if ($iEncStart !== false) {
098ea084 744 $cur_l++;
745 if ($cur_l > $max_l) {
08b7f7cc 746 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
c96c32f4 747 $aRet[] = "=?$default_charset?Q?$ret?=";
748 $iOffset = $i;
749 $cur_l = 0;
750 $ret = '';
751 $iEncStart = false;
08b7f7cc 752 } else {
c96c32f4 753 $ret .= '_';
754 }
755 }
756 break;
757 default:
758 $k = ord($string{$i});
759 if ($k > 126) {
760 if ($iEncStart === false) {
325978ac 761 // do not start encoding in the middle of a string, also take the rest of the word.
762 $sLeadString = substr($string,0,$i);
763 $aLeadString = explode(' ',$sLeadString);
da2415c1 764 $sToBeEncoded = array_pop($aLeadString);
325978ac 765 $iEncStart = $i - strlen($sToBeEncoded);
766 $ret .= $sToBeEncoded;
767 $cur_l += strlen($sToBeEncoded);
c96c32f4 768 }
769 $cur_l += 3;
08b7f7cc 770 /* first we add the encoded string that reached it's max size */
c96c32f4 771 if ($cur_l > ($max_l-2)) {
08b7f7cc 772 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
773 $aRet[] = "=?$default_charset?Q?$ret?= "; /* the next part is also encoded => separate by space */
c96c32f4 774 $cur_l = 3;
775 $ret = '';
776 $iOffset = $i;
08b7f7cc 777 $iEncStart = $i;
c96c32f4 778 }
08b7f7cc 779 $enc_init = true;
c96c32f4 780 $ret .= sprintf("=%02X", $k);
781 } else {
782 if ($iEncStart !== false) {
098ea084 783 $cur_l++;
784 if ($cur_l > $max_l) {
08b7f7cc 785 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
c96c32f4 786 $aRet[] = "=?$default_charset?Q?$ret?=";
787 $iEncStart = false;
788 $iOffset = $i;
789 $cur_l = 0;
098ea084 790 $ret = '';
08b7f7cc 791 } else {
c96c32f4 792 $ret .= $string{$i};
793 }
3d8371be 794 }
c96c32f4 795 }
796 break;
f7b3ba37 797 }
451f74a2 798 }
793cc001 799
c96c32f4 800 if ($enc_init) {
801 if ($iEncStart !== false) {
802 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
803 $aRet[] = "=?$default_charset?Q?$ret?=";
804 } else {
805 $aRet[] = substr($string,$iOffset);
806 }
807 $string = implode('',$aRet);
451f74a2 808 }
3d8371be 809 return $string;
451f74a2 810}
b74ba498 811
691a2d25 812/* This function trys to locate the entity_id of a specific mime element */
3d8371be 813function find_ent_id($id, $message) {
a171b359 814 for ($i = 0, $ret = ''; $ret == '' && $i < count($message->entities); $i++) {
815 if ($message->entities[$i]->header->type0 == 'multipart') {
3d8371be 816 $ret = find_ent_id($id, $message->entities[$i]);
451f74a2 817 } else {
3d8371be 818 if (strcasecmp($message->entities[$i]->header->id, $id) == 0) {
d8cffbab 819// if (sq_check_save_extension($message->entities[$i])) {
a171b359 820 return $message->entities[$i]->entity_id;
da2415c1 821// }
3d8371be 822 }
a3daaaf3 823 }
451f74a2 824 }
3d8371be 825 return $ret;
451f74a2 826}
a3daaaf3 827
e5e9381a 828function sq_check_save_extension($message) {
829 $filename = $message->getFilename();
830 $ext = substr($filename, strrpos($filename,'.')+1);
831 $save_extensions = array('jpg','jpeg','gif','png','bmp');
3d8371be 832 return in_array($ext, $save_extensions);
e5e9381a 833}
834
835
691a2d25 836/**
837 ** HTMLFILTER ROUTINES
838 */
451f74a2 839
2dd879b8 840/**
841 * This function is more or less a wrapper around stripslashes. Apparently
842 * Explorer is stupid enough to just remove the backslashes and then
843 * execute the content of the attribute as if nothing happened.
844 * Who does that?
845 *
846 * @param attvalue The value of the attribute
847 * @return attvalue The value of the attribute stripslashed.
848 */
849function sq_unbackslash($attvalue){
850 /**
851 * Remove any backslashes. See if there are any first.
852 */
91220ed1 853
2dd879b8 854 if (strstr($attvalue, '\\') !== false){
855 $attvalue = stripslashes($attvalue);
856 }
857 return $attvalue;
858}
859
860/**
861 * Kill any tabs, newlines, or carriage returns. Our friends the
862 * makers of the browser with 95% market value decided that it'd
863 * be funny to make "java[tab]script" be just as good as "javascript".
da2415c1 864 *
2dd879b8 865 * @param attvalue The attribute value before extraneous spaces removed.
866 * @return attvalue The attribute value after extraneous spaces removed.
867 */
868function sq_unspace($attvalue){
869 if (strcspn($attvalue, "\t\r\n") != strlen($attvalue)){
870 $attvalue = str_replace(Array("\t", "\r", "\n"), Array('', '', ''),
871 $attvalue);
872 }
873 return $attvalue;
874}
875
691a2d25 876/**
877 * This function returns the final tag out of the tag name, an array
da2415c1 878 * of attributes, and the type of the tag. This function is called by
691a2d25 879 * sq_sanitize internally.
880 *
881 * @param $tagname the name of the tag.
882 * @param $attary the array of attributes and their values
883 * @param $tagtype The type of the tag (see in comments).
884 * @return a string with the final tag representation.
885 */
886function sq_tagprint($tagname, $attary, $tagtype){
b583c3e8 887 $me = 'sq_tagprint';
3d8371be 888
691a2d25 889 if ($tagtype == 2){
890 $fulltag = '</' . $tagname . '>';
891 } else {
892 $fulltag = '<' . $tagname;
893 if (is_array($attary) && sizeof($attary)){
894 $atts = Array();
895 while (list($attname, $attvalue) = each($attary)){
896 array_push($atts, "$attname=$attvalue");
897 }
898 $fulltag .= ' ' . join(" ", $atts);
899 }
900 if ($tagtype == 3){
b583c3e8 901 $fulltag .= ' /';
691a2d25 902 }
b583c3e8 903 $fulltag .= '>';
451f74a2 904 }
691a2d25 905 return $fulltag;
451f74a2 906}
a3daaaf3 907
691a2d25 908/**
909 * A small helper function to use with array_walk. Modifies a by-ref
910 * value and makes it lowercase.
911 *
912 * @param $val a value passed by-ref.
913 * @return void since it modifies a by-ref value.
914 */
915function sq_casenormalize(&$val){
916 $val = strtolower($val);
917}
451f74a2 918
691a2d25 919/**
920 * This function skips any whitespace from the current position within
921 * a string and to the next non-whitespace value.
da2415c1 922 *
691a2d25 923 * @param $body the string
924 * @param $offset the offset within the string where we should start
925 * looking for the next non-whitespace character.
926 * @return the location within the $body where the next
927 * non-whitespace char is located.
928 */
929function sq_skipspace($body, $offset){
b583c3e8 930 $me = 'sq_skipspace';
3d8371be 931 preg_match('/^(\s*)/s', substr($body, $offset), $matches);
691a2d25 932 if (sizeof($matches{1})){
933 $count = strlen($matches{1});
934 $offset += $count;
451f74a2 935 }
691a2d25 936 return $offset;
451f74a2 937}
a3daaaf3 938
691a2d25 939/**
940 * This function looks for the next character within a string. It's
941 * really just a glorified "strpos", except it catches if failures
942 * nicely.
943 *
944 * @param $body The string to look for needle in.
945 * @param $offset Start looking from this position.
946 * @param $needle The character/string to look for.
947 * @return location of the next occurance of the needle, or
948 * strlen($body) if needle wasn't found.
949 */
950function sq_findnxstr($body, $offset, $needle){
3d8371be 951 $me = 'sq_findnxstr';
691a2d25 952 $pos = strpos($body, $needle, $offset);
953 if ($pos === FALSE){
954 $pos = strlen($body);
451f74a2 955 }
691a2d25 956 return $pos;
451f74a2 957}
a3daaaf3 958
691a2d25 959/**
960 * This function takes a PCRE-style regexp and tries to match it
961 * within the string.
962 *
963 * @param $body The string to look for needle in.
964 * @param $offset Start looking from here.
965 * @param $reg A PCRE-style regex to match.
966 * @return Returns a false if no matches found, or an array
967 * with the following members:
968 * - integer with the location of the match within $body
969 * - string with whatever content between offset and the match
970 * - string with whatever it is we matched
971 */
972function sq_findnxreg($body, $offset, $reg){
b583c3e8 973 $me = 'sq_findnxreg';
691a2d25 974 $matches = Array();
975 $retarr = Array();
7d06541f 976 preg_match("%^(.*?)($reg)%si", substr($body, $offset), $matches);
977 if (!isset($matches{0}) || !$matches{0}){
691a2d25 978 $retarr = false;
979 } else {
980 $retarr{0} = $offset + strlen($matches{1});
981 $retarr{1} = $matches{1};
982 $retarr{2} = $matches{2};
983 }
984 return $retarr;
985}
a3daaaf3 986
691a2d25 987/**
988 * This function looks for the next tag.
989 *
990 * @param $body String where to look for the next tag.
991 * @param $offset Start looking from here.
992 * @return false if no more tags exist in the body, or
993 * an array with the following members:
994 * - string with the name of the tag
995 * - array with attributes and their values
996 * - integer with tag type (1, 2, or 3)
997 * - integer where the tag starts (starting "<")
998 * - integer where the tag ends (ending ">")
999 * first three members will be false, if the tag is invalid.
1000 */
1001function sq_getnxtag($body, $offset){
b583c3e8 1002 $me = 'sq_getnxtag';
691a2d25 1003 if ($offset > strlen($body)){
1004 return false;
1005 }
1006 $lt = sq_findnxstr($body, $offset, "<");
1007 if ($lt == strlen($body)){
1008 return false;
1009 }
1010 /**
1011 * We are here:
1012 * blah blah <tag attribute="value">
1013 * \---------^
1014 */
1015 $pos = sq_skipspace($body, $lt+1);
1016 if ($pos >= strlen($body)){
1017 return Array(false, false, false, $lt, strlen($body));
1018 }
1019 /**
1020 * There are 3 kinds of tags:
1021 * 1. Opening tag, e.g.:
1022 * <a href="blah">
1023 * 2. Closing tag, e.g.:
1024 * </a>
1025 * 3. XHTML-style content-less tag, e.g.:
1026 * <img src="blah"/>
1027 */
1028 $tagtype = false;
1029 switch (substr($body, $pos, 1)){
3d8371be 1030 case '/':
1031 $tagtype = 2;
1032 $pos++;
1033 break;
1034 case '!':
1035 /**
1036 * A comment or an SGML declaration.
1037 */
1038 if (substr($body, $pos+1, 2) == "--"){
1039 $gt = strpos($body, "-->", $pos);
1040 if ($gt === false){
1041 $gt = strlen($body);
1042 } else {
1043 $gt += 2;
1044 }
1045 return Array(false, false, false, $lt, $gt);
bb8d0799 1046 } else {
3d8371be 1047 $gt = sq_findnxstr($body, $pos, ">");
1048 return Array(false, false, false, $lt, $gt);
1049 }
1050 break;
1051 default:
1052 /**
1053 * Assume tagtype 1 for now. If it's type 3, we'll switch values
1054 * later.
1055 */
1056 $tagtype = 1;
1057 break;
691a2d25 1058 }
a3daaaf3 1059
691a2d25 1060 $tag_start = $pos;
1061 $tagname = '';
1062 /**
1063 * Look for next [\W-_], which will indicate the end of the tag name.
1064 */
1065 $regary = sq_findnxreg($body, $pos, "[^\w\-_]");
1066 if ($regary == false){
1067 return Array(false, false, false, $lt, strlen($body));
1068 }
1069 list($pos, $tagname, $match) = $regary;
1070 $tagname = strtolower($tagname);
1071
1072 /**
1073 * $match can be either of these:
1074 * '>' indicating the end of the tag entirely.
1075 * '\s' indicating the end of the tag name.
1076 * '/' indicating that this is type-3 xhtml tag.
da2415c1 1077 *
691a2d25 1078 * Whatever else we find there indicates an invalid tag.
1079 */
1080 switch ($match){
3d8371be 1081 case '/':
691a2d25 1082 /**
3d8371be 1083 * This is an xhtml-style tag with a closing / at the
1084 * end, like so: <img src="blah"/>. Check if it's followed
1085 * by the closing bracket. If not, then this tag is invalid
691a2d25 1086 */
3d8371be 1087 if (substr($body, $pos, 2) == "/>"){
1088 $pos++;
1089 $tagtype = 3;
1090 } else {
1091 $gt = sq_findnxstr($body, $pos, ">");
1092 $retary = Array(false, false, false, $lt, $gt);
1093 return $retary;
1094 }
1095 case '>':
1096 return Array($tagname, false, $tagtype, $lt, $pos);
1097 break;
1098 default:
1099 /**
1100 * Check if it's whitespace
1101 */
1102 if (!preg_match('/\s/', $match)){
1103 /**
1104 * This is an invalid tag! Look for the next closing ">".
1105 */
7d06541f 1106 $gt = sq_findnxstr($body, $lt, ">");
3d8371be 1107 return Array(false, false, false, $lt, $gt);
1108 }
1109 break;
691a2d25 1110 }
3d8371be 1111
691a2d25 1112 /**
1113 * At this point we're here:
1114 * <tagname attribute='blah'>
1115 * \-------^
1116 *
1117 * At this point we loop in order to find all attributes.
1118 */
1119 $attname = '';
1120 $atttype = false;
1121 $attary = Array();
1122
1123 while ($pos <= strlen($body)){
1124 $pos = sq_skipspace($body, $pos);
1125 if ($pos == strlen($body)){
1126 /**
1127 * Non-closed tag.
1128 */
1129 return Array(false, false, false, $lt, $pos);
1130 }
1131 /**
1132 * See if we arrived at a ">" or "/>", which means that we reached
1133 * the end of the tag.
1134 */
1135 $matches = Array();
164800ad 1136 if (preg_match("%^(\s*)(>|/>)%s", substr($body, $pos), $matches)) {
c828931c 1137 /**
1138 * Yep. So we did.
1139 */
1140 $pos += strlen($matches{1});
1141 if ($matches{2} == "/>"){
1142 $tagtype = 3;
1143 $pos++;
1144 }
1145 return Array($tagname, $attary, $tagtype, $lt, $pos);
1146 }
a3daaaf3 1147
cca46357 1148 /**
691a2d25 1149 * There are several types of attributes, with optional
1150 * [:space:] between members.
1151 * Type 1:
1152 * attrname[:space:]=[:space:]'CDATA'
1153 * Type 2:
1154 * attrname[:space:]=[:space:]"CDATA"
1155 * Type 3:
1156 * attr[:space:]=[:space:]CDATA
1157 * Type 4:
1158 * attrname
cca46357 1159 *
691a2d25 1160 * We leave types 1 and 2 the same, type 3 we check for
1161 * '"' and convert to "&quot" if needed, then wrap in
1162 * double quotes. Type 4 we convert into:
1163 * attrname="yes".
cca46357 1164 */
3f7c623f 1165 $regary = sq_findnxreg($body, $pos, "[^:\w\-_]");
691a2d25 1166 if ($regary == false){
1167 /**
1168 * Looks like body ended before the end of tag.
1169 */
1170 return Array(false, false, false, $lt, strlen($body));
cca46357 1171 }
691a2d25 1172 list($pos, $attname, $match) = $regary;
1173 $attname = strtolower($attname);
1174 /**
1175 * We arrived at the end of attribute name. Several things possible
1176 * here:
1177 * '>' means the end of the tag and this is attribute type 4
1178 * '/' if followed by '>' means the same thing as above
1179 * '\s' means a lot of things -- look what it's followed by.
1180 * anything else means the attribute is invalid.
1181 */
1182 switch($match){
3d8371be 1183 case '/':
691a2d25 1184 /**
3d8371be 1185 * This is an xhtml-style tag with a closing / at the
1186 * end, like so: <img src="blah"/>. Check if it's followed
1187 * by the closing bracket. If not, then this tag is invalid
691a2d25 1188 */
3d8371be 1189 if (substr($body, $pos, 2) == "/>"){
691a2d25 1190 $pos++;
3d8371be 1191 $tagtype = 3;
691a2d25 1192 } else {
3d8371be 1193 $gt = sq_findnxstr($body, $pos, ">");
1194 $retary = Array(false, false, false, $lt, $gt);
1195 return $retary;
1196 }
1197 case '>':
1198 $attary{$attname} = '"yes"';
1199 return Array($tagname, $attary, $tagtype, $lt, $pos);
1200 break;
1201 default:
1202 /**
1203 * Skip whitespace and see what we arrive at.
1204 */
1205 $pos = sq_skipspace($body, $pos);
1206 $char = substr($body, $pos, 1);
1207 /**
1208 * Two things are valid here:
1209 * '=' means this is attribute type 1 2 or 3.
1210 * \w means this was attribute type 4.
1211 * anything else we ignore and re-loop. End of tag and
1212 * invalid stuff will be caught by our checks at the beginning
1213 * of the loop.
1214 */
1215 if ($char == "="){
1216 $pos++;
1217 $pos = sq_skipspace($body, $pos);
691a2d25 1218 /**
3d8371be 1219 * Here are 3 possibilities:
1220 * "'" attribute type 1
1221 * '"' attribute type 2
1222 * everything else is the content of tag type 3
691a2d25 1223 */
3d8371be 1224 $quot = substr($body, $pos, 1);
1225 if ($quot == "'"){
1226 $regary = sq_findnxreg($body, $pos+1, "\'");
1227 if ($regary == false){
1228 return Array(false, false, false, $lt, strlen($body));
1229 }
1230 list($pos, $attval, $match) = $regary;
1231 $pos++;
1232 $attary{$attname} = "'" . $attval . "'";
1233 } else if ($quot == '"'){
1234 $regary = sq_findnxreg($body, $pos+1, '\"');
1235 if ($regary == false){
1236 return Array(false, false, false, $lt, strlen($body));
1237 }
1238 list($pos, $attval, $match) = $regary;
1239 $pos++;
1240 $attary{$attname} = '"' . $attval . '"';
1241 } else {
1242 /**
1243 * These are hateful. Look for \s, or >.
1244 */
1245 $regary = sq_findnxreg($body, $pos, "[\s>]");
1246 if ($regary == false){
1247 return Array(false, false, false, $lt, strlen($body));
1248 }
1249 list($pos, $attval, $match) = $regary;
1250 /**
1251 * If it's ">" it will be caught at the top.
1252 */
1253 $attval = preg_replace("/\"/s", "&quot;", $attval);
1254 $attary{$attname} = '"' . $attval . '"';
7e235a1a 1255 }
3d8371be 1256 } else if (preg_match("|[\w/>]|", $char)) {
691a2d25 1257 /**
3d8371be 1258 * That was attribute type 4.
691a2d25 1259 */
3d8371be 1260 $attary{$attname} = '"yes"';
1261 } else {
1262 /**
1263 * An illegal character. Find next '>' and return.
1264 */
1265 $gt = sq_findnxstr($body, $pos, ">");
1266 return Array(false, false, false, $lt, $gt);
451f74a2 1267 }
3d8371be 1268 break;
691a2d25 1269 }
1270 }
1271 /**
1272 * The fact that we got here indicates that the tag end was never
1273 * found. Return invalid tag indication so it gets stripped.
1274 */
1275 return Array(false, false, false, $lt, strlen($body));
1276}
1277
1278/**
1279 * This function checks attribute values for entity-encoded values
1280 * and returns them translated into 8-bit strings so we can run
1281 * checks on them.
1282 *
1283 * @param $attvalue A string to run entity check against.
1284 * @return Translated value.
1285 */
91220ed1 1286
691a2d25 1287function sq_deent($attvalue){
b583c3e8 1288 $me = 'sq_deent';
691a2d25 1289 /**
1290 * See if we have to run the checks first. All entities must start
1291 * with "&".
1292 */
91220ed1 1293 if (strpos($attvalue, '&') === false){
691a2d25 1294 return $attvalue;
1295 }
1296 /**
1297 * Check named entities first.
1298 */
1299 $trans = get_html_translation_table(HTML_ENTITIES);
1300 /**
1301 * Leave &quot; in, as it can mess us up.
1302 */
1303 $trans = array_flip($trans);
91220ed1 1304 unset($trans{'&quot;'});
691a2d25 1305 while (list($ent, $val) = each($trans)){
91220ed1 1306 $attvalue = preg_replace('/' . $ent . '*/si', $val, $attvalue);
691a2d25 1307 }
1308 /**
1309 * Now translate numbered entities from 1 to 255 if needed.
1310 */
91220ed1 1311 if (strpos($attvalue, '#') !== false){
691a2d25 1312 $omit = Array(34, 39);
91220ed1 1313 for ($asc = 256; $asc >= 0; $asc--){
691a2d25 1314 if (!in_array($asc, $omit)){
1315 $chr = chr($asc);
91220ed1 1316 $octrule = '/\&#0*' . $asc . ';*/si';
1317 $hexrule = '/\&#x0*' . dechex($asc) . ';*/si';
1318 $attvalue = preg_replace($octrule, $chr, $attvalue);
1319 $attvalue = preg_replace($hexrule, $chr, $attvalue);
a3daaaf3 1320 }
691a2d25 1321 }
1322 }
1323 return $attvalue;
1324}
1325
1326/**
1327 * This function runs various checks against the attributes.
1328 *
1329 * @param $tagname String with the name of the tag.
1330 * @param $attary Array with all tag attributes.
1331 * @param $rm_attnames See description for sq_sanitize
1332 * @param $bad_attvals See description for sq_sanitize
1333 * @param $add_attr_to_tag See description for sq_sanitize
1334 * @param $message message object
1335 * @param $id message id
1336 * @return Array with modified attributes.
1337 */
da2415c1 1338function sq_fixatts($tagname,
1339 $attary,
691a2d25 1340 $rm_attnames,
1341 $bad_attvals,
1342 $add_attr_to_tag,
1343 $message,
b3af12ef 1344 $id,
3d8371be 1345 $mailbox
691a2d25 1346 ){
b583c3e8 1347 $me = 'sq_fixatts';
691a2d25 1348 while (list($attname, $attvalue) = each($attary)){
1349 /**
1350 * See if this attribute should be removed.
1351 */
1352 foreach ($rm_attnames as $matchtag=>$matchattrs){
1353 if (preg_match($matchtag, $tagname)){
1354 foreach ($matchattrs as $matchattr){
1355 if (preg_match($matchattr, $attname)){
1356 unset($attary{$attname});
1357 continue;
1358 }
451f74a2 1359 }
451f74a2 1360 }
691a2d25 1361 }
1362 /**
2dd879b8 1363 * Remove any backslashes, entities, and extraneous whitespace.
691a2d25 1364 */
2dd879b8 1365 $attvalue = sq_unbackslash($attvalue);
691a2d25 1366 $attvalue = sq_deent($attvalue);
2dd879b8 1367 $attvalue = sq_unspace($attvalue);
691a2d25 1368
1369 /**
1370 * Now let's run checks on the attvalues.
1371 * I don't expect anyone to comprehend this. If you do,
1372 * get in touch with me so I can drive to where you live and
1373 * shake your hand personally. :)
1374 */
1375 foreach ($bad_attvals as $matchtag=>$matchattrs){
1376 if (preg_match($matchtag, $tagname)){
1377 foreach ($matchattrs as $matchattr=>$valary){
1378 if (preg_match($matchattr, $attname)){
1379 /**
1380 * There are two arrays in valary.
1381 * First is matches.
1382 * Second one is replacements
1383 */
1384 list($valmatch, $valrepl) = $valary;
da2415c1 1385 $newvalue =
691a2d25 1386 preg_replace($valmatch, $valrepl, $attvalue);
1387 if ($newvalue != $attvalue){
1388 $attary{$attname} = $newvalue;
1389 }
1390 }
1391 }
451f74a2 1392 }
a3daaaf3 1393 }
691a2d25 1394 /**
1395 * Turn cid: urls into http-friendly ones.
1396 */
1397 if (preg_match("/^[\'\"]\s*cid:/si", $attvalue)){
b3af12ef 1398 $attary{$attname} = sq_cid2http($message, $id, $attvalue, $mailbox);
691a2d25 1399 }
a3daaaf3 1400 }
691a2d25 1401 /**
1402 * See if we need to append any attributes to this tag.
1403 */
1404 foreach ($add_attr_to_tag as $matchtag=>$addattary){
1405 if (preg_match($matchtag, $tagname)){
1406 $attary = array_merge($attary, $addattary);
1407 }
1408 }
1409 return $attary;
451f74a2 1410}
a3daaaf3 1411
691a2d25 1412/**
1413 * This function edits the style definition to make them friendly and
1414 * usable in squirrelmail.
da2415c1 1415 *
691a2d25 1416 * @param $message the message object
1417 * @param $id the message id
1418 * @param $content a string with whatever is between <style> and </style>
e60a299a 1419 * @param $mailbox the message mailbox
691a2d25 1420 * @return a string with edited content.
1421 */
e60a299a 1422function sq_fixstyle($body, $pos, $message, $id, $mailbox){
691a2d25 1423 global $view_unsafe_images;
b583c3e8 1424 $me = 'sq_fixstyle';
7d06541f 1425 $ret = sq_findnxreg($body, $pos, '</\s*style\s*>');
1426 if ($ret == FALSE){
1427 return array(FALSE, strlen($body));
1428 }
1429 $newpos = $ret[0] + strlen($ret[2]);
1430 $content = $ret[1];
691a2d25 1431 /**
1432 * First look for general BODY style declaration, which would be
1433 * like so:
1434 * body {background: blah-blah}
1435 * and change it to .bodyclass so we can just assign it to a <div>
1436 */
1437 $content = preg_replace("|body(\s*\{.*?\})|si", ".bodyclass\\1", $content);
3d8371be 1438 $secremoveimg = '../images/' . _("sec_remove_eng.png");
691a2d25 1439 /**
1440 * Fix url('blah') declarations.
1441 */
7d06541f 1442 $content = preg_replace("|url\s*\(\s*([\'\"])\s*\S+script\s*:.*?([\'\"])\s*\)|si",
691a2d25 1443 "url(\\1$secremoveimg\\2)", $content);
1444 /**
1445 * Fix url('https*://.*) declarations but only if $view_unsafe_images
1446 * is false.
1447 */
1448 if (!$view_unsafe_images){
7d06541f 1449 $content = preg_replace("|url\s*\(\s*([\'\"])\s*https*:.*?([\'\"])\s*\)|si",
691a2d25 1450 "url(\\1$secremoveimg\\2)", $content);
1451 }
da2415c1 1452
691a2d25 1453 /**
1454 * Fix urls that refer to cid:
1455 */
da2415c1 1456 while (preg_match("|url\s*\(\s*([\'\"]\s*cid:.*?[\'\"])\s*\)|si",
7d06541f 1457 $content, $matches)){
691a2d25 1458 $cidurl = $matches{1};
e60a299a 1459 $httpurl = sq_cid2http($message, $id, $cidurl, $mailbox);
7d06541f 1460 $content = preg_replace("|url\s*\(\s*$cidurl\s*\)|si",
691a2d25 1461 "url($httpurl)", $content);
1462 }
a3daaaf3 1463
691a2d25 1464 /**
bb8d0799 1465 * Fix stupid css declarations which lead to vulnerabilities
691a2d25 1466 * in IE.
1467 */
f83c60a2 1468 $match = Array('/expression/i',
1469 '/behaviou*r/i',
2dd879b8 1470 '/binding/i',
1471 '/include-source/i');
1472 $replace = Array('idiocy', 'idiocy', 'idiocy', 'idiocy');
bb8d0799 1473 $content = preg_replace($match, $replace, $content);
7d06541f 1474 return array($content, $newpos);
691a2d25 1475}
a3daaaf3 1476
691a2d25 1477/**
1478 * This function converts cid: url's into the ones that can be viewed in
1479 * the browser.
1480 *
1481 * @param $message the message object
1482 * @param $id the message id
1483 * @param $cidurl the cid: url.
e60a299a 1484 * @param $mailbox the message mailbox
691a2d25 1485 * @return a string with a http-friendly url
1486 */
b3af12ef 1487function sq_cid2http($message, $id, $cidurl, $mailbox){
691a2d25 1488 /**
1489 * Get rid of quotes.
1490 */
1491 $quotchar = substr($cidurl, 0, 1);
2dd879b8 1492 if ($quotchar == '"' || $quotchar == "'"){
1493 $cidurl = str_replace($quotchar, "", $cidurl);
1494 } else {
1495 $quotchar = '';
1496 }
691a2d25 1497 $cidurl = substr(trim($cidurl), 4);
e5e9381a 1498 $linkurl = find_ent_id($cidurl, $message);
1499 /* in case of non-save cid links $httpurl should be replaced by a sort of
1500 unsave link image */
1501 $httpurl = '';
1502 if ($linkurl) {
6b04287c 1503 $httpurl = $quotchar . SM_PATH . 'src/download.php?absolute_dl=true&amp;' .
e5e9381a 1504 "passed_id=$id&amp;mailbox=" . urlencode($mailbox) .
3d8371be 1505 '&amp;ent_id=' . $linkurl . $quotchar;
e5e9381a 1506 }
691a2d25 1507 return $httpurl;
1508}
1509
1510/**
1511 * This function changes the <body> tag into a <div> tag since we
1512 * can't really have a body-within-body.
1513 *
2dd879b8 1514 * @param $attary an array of attributes and values of <body>
1515 * @param $mailbox mailbox we're currently reading (for cid2http)
1516 * @param $message current message (for cid2http)
1517 * @param $id current message id (for cid2http)
1518 * @return a modified array of attributes to be set for <div>
691a2d25 1519 */
2dd879b8 1520function sq_body2div($attary, $mailbox, $message, $id){
b583c3e8 1521 $me = 'sq_body2div';
3d8371be 1522 $divattary = Array('class' => "'bodyclass'");
b583c3e8 1523 $bgcolor = '#ffffff';
1524 $text = '#000000';
80b4debd 1525 $has_bgc_stl = $has_txt_stl = false;
b583c3e8 1526 $styledef = '';
691a2d25 1527 if (is_array($attary) && sizeof($attary) > 0){
1528 foreach ($attary as $attname=>$attvalue){
1529 $quotchar = substr($attvalue, 0, 1);
1530 $attvalue = str_replace($quotchar, "", $attvalue);
1531 switch ($attname){
3d8371be 1532 case 'background':
da2415c1 1533 $attvalue = sq_cid2http($message, $id,
2dd879b8 1534 $attvalue, $mailbox);
3d8371be 1535 $styledef .= "background-image: url('$attvalue'); ";
1536 break;
1537 case 'bgcolor':
80b4debd 1538 $has_bgc_stl = true;
3d8371be 1539 $styledef .= "background-color: $attvalue; ";
1540 break;
1541 case 'text':
80b4debd 1542 $has_txt_stl = true;
3d8371be 1543 $styledef .= "color: $attvalue; ";
1544 break;
691a2d25 1545 }
a3daaaf3 1546 }
80b4debd 1547 // Outlook defines a white bgcolor and no text color. This can lead to
1548 // white text on a white bg with certain themes.
1549 if ($has_bgc_stl && !$has_txt_stl) {
1550 $styledef .= "color: $text; ";
1551 }
691a2d25 1552 if (strlen($styledef) > 0){
1553 $divattary{"style"} = "\"$styledef\"";
1554 }
1555 }
1556 return $divattary;
1557}
a3daaaf3 1558
691a2d25 1559/**
1560 * This is the main function and the one you should actually be calling.
1561 * There are several variables you should be aware of an which need
1562 * special description.
1563 *
1564 * Since the description is quite lengthy, see it here:
1565 * http://www.mricon.com/html/phpfilter.html
1566 *
1567 * @param $body the string with HTML you wish to filter
1568 * @param $tag_list see description above
1569 * @param $rm_tags_with_content see description above
1570 * @param $self_closing_tags see description above
1571 * @param $force_tag_closing see description above
1572 * @param $rm_attnames see description above
1573 * @param $bad_attvals see description above
1574 * @param $add_attr_to_tag see description above
1575 * @param $message message object
1576 * @param $id message id
1577 * @return sanitized html safe to show on your pages.
1578 */
da2415c1 1579function sq_sanitize($body,
1580 $tag_list,
691a2d25 1581 $rm_tags_with_content,
1582 $self_closing_tags,
1583 $force_tag_closing,
1584 $rm_attnames,
1585 $bad_attvals,
1586 $add_attr_to_tag,
1587 $message,
b3af12ef 1588 $id,
3d8371be 1589 $mailbox
691a2d25 1590 ){
b583c3e8 1591 $me = 'sq_sanitize';
7d06541f 1592 $rm_tags = array_shift($tag_list);
691a2d25 1593 /**
1594 * Normalize rm_tags and rm_tags_with_content.
1595 */
7d06541f 1596 @array_walk($tag_list, 'sq_casenormalize');
691a2d25 1597 @array_walk($rm_tags_with_content, 'sq_casenormalize');
1598 @array_walk($self_closing_tags, 'sq_casenormalize');
1599 /**
1600 * See if tag_list is of tags to remove or tags to allow.
1601 * false means remove these tags
1602 * true means allow these tags
1603 */
691a2d25 1604 $curpos = 0;
1605 $open_tags = Array();
2dd879b8 1606 $trusted = "\n<!-- begin sanitized html -->\n";
691a2d25 1607 $skip_content = false;
bb8d0799 1608 /**
1609 * Take care of netscape's stupid javascript entities like
1610 * &{alert('boo')};
1611 */
1612 $body = preg_replace("/&(\{.*?\};)/si", "&amp;\\1", $body);
691a2d25 1613
7d06541f 1614 while (($curtag = sq_getnxtag($body, $curpos)) != FALSE){
691a2d25 1615 list($tagname, $attary, $tagtype, $lt, $gt) = $curtag;
1616 $free_content = substr($body, $curpos, $lt-$curpos);
1617 /**
1618 * Take care of <style>
1619 */
7d06541f 1620 if ($tagname == "style" && $tagtype == 1){
da2415c1 1621 list($free_content, $curpos) =
e60a299a 1622 sq_fixstyle($body, $gt+1, $message, $id, $mailbox);
7d06541f 1623 if ($free_content != FALSE){
1624 $trusted .= sq_tagprint($tagname, $attary, $tagtype);
1625 $trusted .= $free_content;
1626 $trusted .= sq_tagprint($tagname, false, 2);
1627 }
1628 continue;
691a2d25 1629 }
1630 if ($skip_content == false){
1631 $trusted .= $free_content;
691a2d25 1632 }
1633 if ($tagname != FALSE){
1634 if ($tagtype == 2){
1635 if ($skip_content == $tagname){
1636 /**
1637 * Got to the end of tag we needed to remove.
1638 */
1639 $tagname = false;
1640 $skip_content = false;
1641 } else {
1642 if ($skip_content == false){
c828931c 1643 if ($tagname == "body"){
1644 $tagname = "div";
2dd879b8 1645 }
da2415c1 1646 if (isset($open_tags{$tagname}) &&
2dd879b8 1647 $open_tags{$tagname} > 0){
1648 $open_tags{$tagname}--;
691a2d25 1649 } else {
2dd879b8 1650 $tagname = false;
691a2d25 1651 }
691a2d25 1652 }
1653 }
1654 } else {
1655 /**
1656 * $rm_tags_with_content
1657 */
1658 if ($skip_content == false){
1659 /**
1660 * See if this is a self-closing type and change
1661 * tagtype appropriately.
1662 */
1663 if ($tagtype == 1
1664 && in_array($tagname, $self_closing_tags)){
2dd879b8 1665 $tagtype = 3;
691a2d25 1666 }
1667 /**
1668 * See if we should skip this tag and any content
1669 * inside it.
1670 */
1671 if ($tagtype == 1 &&
1672 in_array($tagname, $rm_tags_with_content)){
1673 $skip_content = $tagname;
1674 } else {
da2415c1 1675 if (($rm_tags == false
691a2d25 1676 && in_array($tagname, $tag_list)) ||
1677 ($rm_tags == true &&
1678 !in_array($tagname, $tag_list))){
1679 $tagname = false;
1680 } else {
2dd879b8 1681 /**
1682 * Convert body into div.
1683 */
1684 if ($tagname == "body"){
1685 $tagname = "div";
da2415c1 1686 $attary = sq_body2div($attary, $mailbox,
2dd879b8 1687 $message, $id);
1688 }
691a2d25 1689 if ($tagtype == 1){
1690 if (isset($open_tags{$tagname})){
1691 $open_tags{$tagname}++;
1692 } else {
1693 $open_tags{$tagname}=1;
1694 }
1695 }
1696 /**
1697 * This is where we run other checks.
1698 */
1699 if (is_array($attary) && sizeof($attary) > 0){
1700 $attary = sq_fixatts($tagname,
1701 $attary,
1702 $rm_attnames,
1703 $bad_attvals,
1704 $add_attr_to_tag,
1705 $message,
b3af12ef 1706 $id,
3d8371be 1707 $mailbox
691a2d25 1708 );
1709 }
1710 }
1711 }
691a2d25 1712 }
1713 }
1714 if ($tagname != false && $skip_content == false){
1715 $trusted .= sq_tagprint($tagname, $attary, $tagtype);
1716 }
691a2d25 1717 }
1718 $curpos = $gt+1;
a3daaaf3 1719 }
691a2d25 1720 $trusted .= substr($body, $curpos, strlen($body)-$curpos);
1721 if ($force_tag_closing == true){
1722 foreach ($open_tags as $tagname=>$opentimes){
1723 while ($opentimes > 0){
1724 $trusted .= '</' . $tagname . '>';
1725 $opentimes--;
1726 }
1727 }
1728 $trusted .= "\n";
1729 }
1730 $trusted .= "<!-- end sanitized html -->\n";
1731 return $trusted;
1732}
451f74a2 1733
691a2d25 1734/**
1735 * This is a wrapper function to call html sanitizing routines.
1736 *
1737 * @param $body the body of the message
1738 * @param $id the id of the message
1739 * @return a string with html safe to display in the browser.
1740 */
7aad7b77 1741function magicHTML($body, $id, $message, $mailbox = 'INBOX') {
691a2d25 1742 global $attachment_common_show_images, $view_unsafe_images,
3d8371be 1743 $has_unsafe_images;
691a2d25 1744 /**
1745 * Don't display attached images in HTML mode.
1746 */
1747 $attachment_common_show_images = false;
1748 $tag_list = Array(
1749 false,
1750 "object",
1751 "meta",
1752 "html",
1753 "head",
cc34b00d 1754 "base",
e18cb31b 1755 "link",
45071bd6 1756 "frame",
2dd879b8 1757 "iframe",
1758 "plaintext",
1759 "marquee"
691a2d25 1760 );
1761
1762 $rm_tags_with_content = Array(
1763 "script",
1764 "applet",
1765 "embed",
2dd879b8 1766 "title",
1767 "frameset",
1768 "xml"
691a2d25 1769 );
1770
1771 $self_closing_tags = Array(
1772 "img",
1773 "br",
1774 "hr",
1775 "input"
1776 );
1777
2dd879b8 1778 $force_tag_closing = true;
691a2d25 1779
1780 $rm_attnames = Array(
1781 "/.*/" =>
1782 Array(
3a50c8d2 1783 "/target/i",
1784 "/^on.*/i",
1785 "/^dynsrc/i",
1786 "/^data.*/i",
1787 "/^lowsrc.*/i"
691a2d25 1788 )
1789 );
1790
1791 $secremoveimg = "../images/" . _("sec_remove_eng.png");
1792 $bad_attvals = Array(
1793 "/.*/" =>
1794 Array(
0a6ec9b5 1795 "/^src|background/i" =>
691a2d25 1796 Array(
1797 Array(
f83c60a2 1798 "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si",
1799 "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si",
1800 "/^([\'\"])\s*about\s*:.*([\'\"])/si"
691a2d25 1801 ),
1802 Array(
1803 "\\1$secremoveimg\\2",
bb8d0799 1804 "\\1$secremoveimg\\2",
3d8371be 1805 "\\1$secremoveimg\\2",
1806 "\\1$secremoveimg\\2"
691a2d25 1807 )
1808 ),
0a6ec9b5 1809 "/^href|action/i" =>
1810 Array(
1811 Array(
f83c60a2 1812 "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si",
1813 "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si",
1814 "/^([\'\"])\s*about\s*:.*([\'\"])/si"
0a6ec9b5 1815 ),
1816 Array(
2dd879b8 1817 "\\1#\\1",
1818 "\\1#\\1",
1819 "\\1#\\1",
1820 "\\1#\\1"
0a6ec9b5 1821 )
1822 ),
f83c60a2 1823 "/^style/i" =>
691a2d25 1824 Array(
1825 Array(
f83c60a2 1826 "/expression/i",
1827 "/binding/i",
1828 "/behaviou*r/i",
2dd879b8 1829 "/include-source/i",
7d06541f 1830 "/url\s*\(\s*([\'\"])\s*\S+script\s*:.*([\'\"])\s*\)/si",
1831 "/url\s*\(\s*([\'\"])\s*mocha\s*:.*([\'\"])\s*\)/si",
1832 "/url\s*\(\s*([\'\"])\s*about\s*:.*([\'\"])\s*\)/si"
691a2d25 1833 ),
1834 Array(
bb8d0799 1835 "idiocy",
3d8371be 1836 "idiocy",
1837 "idiocy",
2dd879b8 1838 "idiocy",
1839 "url(\\1#\\1)",
1840 "url(\\1#\\1)",
1841 "url(\\1#\\1)",
1842 "url(\\1#\\1)"
691a2d25 1843 )
1844 )
1845 )
1846 );
5262d9a6 1847 if( !sqgetGlobalVar('view_unsafe_images', $view_unsafe_images, SQ_GET) ) {
2dd879b8 1848 $view_unsafe_images = false;
45071bd6 1849 }
691a2d25 1850 if (!$view_unsafe_images){
1851 /**
1852 * Remove any references to http/https if view_unsafe_images set
1853 * to false.
1854 */
0a6ec9b5 1855 array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[0],
f83c60a2 1856 '/^([\'\"])\s*https*:.*([\'\"])/si');
0a6ec9b5 1857 array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[1],
2dd879b8 1858 "\\1$secremoveimg\\1");
3a50c8d2 1859 array_push($bad_attvals{'/.*/'}{'/^style/i'}[0],
43d678b6 1860 '/url\(([\'\"])\s*https*:.*([\'\"])\)/si');
3a50c8d2 1861 array_push($bad_attvals{'/.*/'}{'/^style/i'}[1],
2dd879b8 1862 "url(\\1$secremoveimg\\1)");
691a2d25 1863 }
451f74a2 1864
691a2d25 1865 $add_attr_to_tag = Array(
da2415c1 1866 "/^a$/i" =>
2dd879b8 1867 Array('target'=>'"_new"',
1868 'title'=>'"'._("This external link will open in a new window").'"'
1869 )
1870 );
da2415c1 1871 $trusted = sq_sanitize($body,
1872 $tag_list,
691a2d25 1873 $rm_tags_with_content,
1874 $self_closing_tags,
1875 $force_tag_closing,
1876 $rm_attnames,
1877 $bad_attvals,
1878 $add_attr_to_tag,
1879 $message,
b3af12ef 1880 $id,
3d8371be 1881 $mailbox
691a2d25 1882 );
f83c60a2 1883 if (preg_match("|$secremoveimg|i", $trusted)){
691a2d25 1884 $has_unsafe_images = true;
da2415c1 1885 }
691a2d25 1886 return $trusted;
451f74a2 1887}
a4a70693 1888
da2415c1 1889/**
1890 * function SendDownloadHeaders - send file to the browser
1891 *
1892 * Original Source: SM core src/download.php
1893 * moved here to make it available to other code, and separate
1894 * front end from back end functionality.
1895 *
1896 * @param string $type0 first half of mime type
1897 * @param string $type1 second half of mime type
1898 * @param string $filename filename to tell the browser for downloaded file
1899 * @param boolean $force whether to force the download dialog to pop
07c49f57 1900 * @param integer $filesize optional, send the Content-Header and length to the browser
da2415c1 1901 * @return void
1902 */
07c49f57 1903 function SendDownloadHeaders($type0, $type1, $filename, $force, $filesize=0) {
da2415c1 1904 global $languages, $squirrelmail_language;
1905 $isIE = $isIE6 = 0;
1906
1907 sqgetGlobalVar('HTTP_USER_AGENT', $HTTP_USER_AGENT, SQ_SERVER);
1908
1909 if (strstr($HTTP_USER_AGENT, 'compatible; MSIE ') !== false &&
1910 strstr($HTTP_USER_AGENT, 'Opera') === false) {
1911 $isIE = 1;
1912 }
1913
1914 if (strstr($HTTP_USER_AGENT, 'compatible; MSIE 6') !== false &&
1915 strstr($HTTP_USER_AGENT, 'Opera') === false) {
1916 $isIE6 = 1;
1917 }
1918
1919 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
1920 function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
1921 $filename =
1922 $languages[$squirrelmail_language]['XTRA_CODE']('downloadfilename', $filename, $HTTP_USER_AGENT);
1923 } else {
1924 $filename = ereg_replace('[\\/:\*\?"<>\|;]', '_', str_replace('&nbsp;', ' ', $filename));
1925 }
1926
1927 // A Pox on Microsoft and it's Office!
1928 if (!$force) {
1929 // Try to show in browser window
1930 header("Content-Disposition: inline; filename=\"$filename\"");
1931 header("Content-Type: $type0/$type1; name=\"$filename\"");
1932 } else {
1933 // Try to pop up the "save as" box
1934 // IE makes this hard. It pops up 2 save boxes, or none.
1935 // http://support.microsoft.com/support/kb/articles/Q238/5/88.ASP
1936 // But, accordint to Microsoft, it is "RFC compliant but doesn't
1937 // take into account some deviations that allowed within the
1938 // specification." Doesn't that mean RFC non-compliant?
1939 // http://support.microsoft.com/support/kb/articles/Q258/4/52.ASP
1940 //
1941 // The best thing you can do for IE is to upgrade to the latest
1942 // version
1943 if ($isIE && !$isIE6) {
1944 // http://support.microsoft.com/support/kb/articles/Q182/3/15.asp
1945 // Do not have quotes around filename, but that applied to
1946 // "attachment"... does it apply to inline too?
1947 //
1948 // This combination seems to work mostly. IE 5.5 SP 1 has
1949 // known issues (see the Microsoft Knowledge Base)
1950 header("Content-Disposition: inline; filename=$filename");
1951 // This works for most types, but doesn't work with Word files
1952 header("Content-Type: application/download; name=\"$filename\"");
1953
1954 // These are spares, just in case. :-)
1955 //header("Content-Type: $type0/$type1; name=\"$filename\"");
1956 //header("Content-Type: application/x-msdownload; name=\"$filename\"");
1957 //header("Content-Type: application/octet-stream; name=\"$filename\"");
1958 } else {
1959 header("Content-Disposition: attachment; filename=\"$filename\"");
1960 // application/octet-stream forces download for Netscape
1961 header("Content-Type: application/octet-stream; name=\"$filename\"");
1962 }
1963 }
07c49f57 1964
1965 //send the content-length header if the calling function provides it
1966 if ($filesize > 0) {
1967 header("Content-Length: $filesize");
1968 }
1969
1970 } // end fn SendDownlaodHeaders
da2415c1 1971
d6c32258 1972?>
Unnamed repository; edit this file 'description' to name the repository.