Formatting and adding FIXME to addressbook.php
[squirrelmail.git] / functions / mime.php
CommitLineData
59177427 1<?php
2ba13803 2
35586184 3/**
02474e43 4* mime.php
5*
6* Copyright (c) 1999-2005 The SquirrelMail Project Team
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* @version $Id$
13* @package squirrelmail
14*/
b74ba498 15
d6c32258 16/** The typical includes... */
b68edc75 17require_once(SM_PATH . 'functions/imap.php');
18require_once(SM_PATH . 'functions/attachment_common.php');
2c25d36a 19/** add sqm_baseuri()*/
20include_once(SM_PATH . 'functions/display_messages.php');
8beafbbc 21
7c7b74b3 22/* -------------------------------------------------------------------------- */
23/* MIME DECODING */
24/* -------------------------------------------------------------------------- */
b74ba498 25
d6c32258 26/**
02474e43 27* Get the MIME structure
28*
29* This function gets the structure of a message and stores it in the "message" class.
30* It will return this object for use with all relevant header information and
31* fully parsed into the standard "message" object format.
32*/
a4a70693 33function mime_structure ($bodystructure, $flags=array()) {
c9d78ab4 34
3d8371be 35 /* Isolate the body structure and remove beginning and end parenthesis. */
a4a70693 36 $read = trim(substr ($bodystructure, strpos(strtolower($bodystructure), 'bodystructure') + 13));
451f74a2 37 $read = trim(substr ($read, 0, -1));
22efa9fb 38 $i = 0;
39 $msg = Message::parseStructure($read,$i);
9de42168 40 if (!is_object($msg)) {
bd9c880b 41 include_once(SM_PATH . 'functions/display_messages.php');
3d8371be 42 global $color, $mailbox;
c96c32f4 43 /* removed urldecode because $_GET is auto urldecoded ??? */
a48eba8f 44 displayPageHeader( $color, $mailbox );
5e8de8b6 45 $errormessage = _("SquirrelMail could not decode the bodystructure of the message");
3c621ba1 46 $errormessage .= '<br />'._("the provided bodystructure by your imap-server").':<br /><br />';
472e7acb 47 $errormessage .= '<pre>' . htmlspecialchars($read) . '</pre>';
9de42168 48 plain_error_message( $errormessage, $color );
3d8371be 49 echo '</body></html>';
9de42168 50 exit;
51 }
a4a70693 52 if (count($flags)) {
7a9e9c89 53 foreach ($flags as $flag) {
54 $char = strtoupper($flag{1});
55 switch ($char) {
3d8371be 56 case 'S':
57 if (strtolower($flag) == '\\seen') {
58 $msg->is_seen = true;
59 }
60 break;
61 case 'A':
62 if (strtolower($flag) == '\\answered') {
63 $msg->is_answered = true;
64 }
65 break;
66 case 'D':
67 if (strtolower($flag) == '\\deleted') {
68 $msg->is_deleted = true;
69 }
70 break;
71 case 'F':
72 if (strtolower($flag) == '\\flagged') {
73 $msg->is_flagged = true;
74 }
75 break;
76 case 'M':
77 if (strtolower($flag) == '$mdnsent') {
78 $msg->is_mdnsent = true;
79 }
80 break;
81 default:
82 break;
7a9e9c89 83 }
84 }
451f74a2 85 }
7a9e9c89 86 // listEntities($msg);
3d8371be 87 return $msg;
451f74a2 88}
b74ba498 89
22efa9fb 90
91
3d8371be 92/* This starts the parsing of a particular structure. It is called recursively,
02474e43 93* so it can be passed different structures. It returns an object of type
94* $message.
95* First, it checks to see if it is a multipart message. If it is, then it
96* handles that as it sees is necessary. If it is just a regular entity,
97* then it parses it and adds the necessary header information (by calling out
98* to mime_get_elements()
99*/
451f74a2 100
4d592352 101function mime_fetch_body($imap_stream, $id, $ent_id=1, $fetch_size=0) {
3d8371be 102 /* Do a bit of error correction. If we couldn't find the entity id, just guess
02474e43 103 * that it is the first one. That is usually the case anyway.
104 */
7c7b74b3 105
09a4bde3 106 if (!$ent_id) {
08b7f7cc 107 $cmd = "FETCH $id BODY[]";
1035e159 108 } else {
08b7f7cc 109 $cmd = "FETCH $id BODY[$ent_id]";
09a4bde3 110 }
3d8371be 111
4d592352 112 if ($fetch_size!=0) $cmd .= "<0.$fetch_size>";
da2415c1 113
6201339c 114 $data = sqimap_run_command ($imap_stream, $cmd, true, $response, $message, TRUE);
77b88425 115 do {
3d8371be 116 $topline = trim(array_shift($data));
117 } while($topline && ($topline[0] == '*') && !preg_match('/\* [0-9]+ FETCH.*/i', $topline)) ;
a4a70693 118
451f74a2 119 $wholemessage = implode('', $data);
120 if (ereg('\\{([^\\}]*)\\}', $topline, $regs)) {
3d8371be 121 $ret = substr($wholemessage, 0, $regs[1]);
122 /* There is some information in the content info header that could be important
02474e43 123 * in order to parse html messages. Let's get them here.
124 */
0600bdf1 125// if ($ret{0} == '<') {
6201339c 126// $data = sqimap_run_command ($imap_stream, "FETCH $id BODY[$ent_id.MIME]", true, $response, $message, TRUE);
0600bdf1 127// }
451f74a2 128 } else if (ereg('"([^"]*)"', $topline, $regs)) {
129 $ret = $regs[1];
130 } else {
131 global $where, $what, $mailbox, $passed_id, $startMessage;
3d8371be 132 $par = 'mailbox=' . urlencode($mailbox) . '&amp;passed_id=' . $passed_id;
451f74a2 133 if (isset($where) && isset($what)) {
3d8371be 134 $par .= '&amp;where=' . urlencode($where) . '&amp;what=' . urlencode($what);
a3daaaf3 135 } else {
3d8371be 136 $par .= '&amp;startMessage=' . $startMessage . '&amp;show_more=0';
451f74a2 137 }
e5ea9327 138 $par .= '&amp;response=' . urlencode($response) .
3d8371be 139 '&amp;message=' . urlencode($message) .
140 '&amp;topline=' . urlencode($topline);
a019eeb8 141
3c621ba1 142 echo '<tt><br />' .
02474e43 143 '<table width="80%"><tr>' .
144 '<tr><td colspan="2">' .
145 _("Body retrieval error. The reason for this is most probably that the message is malformed.") .
146 '</td></tr>' .
147 '<tr><td><b>' . _("Command:") . "</td><td>$cmd</td></tr>" .
148 '<tr><td><b>' . _("Response:") . "</td><td>$response</td></tr>" .
149 '<tr><td><b>' . _("Message:") . "</td><td>$message</td></tr>" .
150 '<tr><td><b>' . _("FETCH line:") . "</td><td>$topline</td></tr>" .
151 "</table><br /></tt></font><hr />";
346817d4 152
6201339c 153 $data = sqimap_run_command ($imap_stream, "FETCH $passed_id BODY[]", true, $response, $message, TRUE);
451f74a2 154 array_shift($data);
155 $wholemessage = implode('', $data);
a019eeb8 156
346817d4 157 $ret = $wholemessage;
a3daaaf3 158 }
3d8371be 159 return $ret;
451f74a2 160}
d4467150 161
6cc670de 162function mime_print_body_lines ($imap_stream, $id, $ent_id=1, $encoding, $rStream='php://stdout') {
1035e159 163
3d8371be 164 /* Don't kill the connection if the browser is over a dialup
02474e43 165 * and it would take over 30 seconds to download it.
166 * Don't call set_time_limit in safe mode.
167 */
b7206e1d 168
3d8371be 169 if (!ini_get('safe_mode')) {
b7206e1d 170 set_time_limit(0);
171 }
7c7b74b3 172 /* in case of base64 encoded attachments, do not buffer them.
02474e43 173 Instead, echo the decoded attachment directly to screen */
7c7b74b3 174 if (strtolower($encoding) == 'base64') {
175 if (!$ent_id) {
7591f143 176 $query = "FETCH $id BODY[]";
7c7b74b3 177 } else {
7591f143 178 $query = "FETCH $id BODY[$ent_id]";
7c7b74b3 179 }
7591f143 180 sqimap_run_command($imap_stream,$query,true,$response,$message,TRUE,'sqimap_base64_decode',$rStream,true);
1d142b8d 181 } else {
7591f143 182 $body = mime_fetch_body ($imap_stream, $id, $ent_id);
183 if (is_resource($rStream)) {
184 fputs($rStream,decodeBody($body,$encoding));
185 } else {
186 echo decodeBody($body, $encoding);
187 }
1d142b8d 188 }
346817d4 189
da2415c1 190 /*
02474e43 191 TODO, use the same method for quoted printable.
192 However, I assume that quoted printable attachments aren't that large
193 so the performancegain / memory usage drop will be minimal.
194 If we decide to add that then we need to adapt sqimap_fread because
195 we need to split te result on \n and fread doesn't stop at \n. That
196 means we also should provide $results from sqimap_fread (by ref) to
197 te function and set $no_return to false. The $filter function for
198 quoted printable should handle unsetting of $results.
7c7b74b3 199 */
da2415c1 200 /*
02474e43 201 TODO 2: find out how we write to the output stream php://stdout. fwrite
202 doesn't work because 'php://stdout isn't a stream.
7c7b74b3 203 */
204
5d9c6f73 205 return;
451f74a2 206}
beb9e459 207
451f74a2 208/* -[ END MIME DECODING ]----------------------------------------------------------- */
d4467150 209
3d8371be 210/* This is here for debugging purposes. It will print out a list
02474e43 211* of all the entity IDs that are in the $message object.
212*/
451f74a2 213function listEntities ($message) {
3d8371be 214 if ($message) {
3c621ba1 215 echo "<tt>" . $message->entity_id . ' : ' . $message->type0 . '/' . $message->type1 . ' parent = '. $message->parent->entity_id. '<br />';
3d8371be 216 for ($i = 0; isset($message->entities[$i]); $i++) {
217 echo "$i : ";
218 $msg = listEntities($message->entities[$i]);
219
220 if ($msg) {
221 echo "return: ";
222 return $msg;
223 }
224 }
a4a70693 225 }
451f74a2 226}
f0c4dc12 227
f792c641 228function getPriorityStr($priority) {
3d8371be 229 $priority_level = substr($priority,0,1);
230
231 switch($priority_level) {
232 /* Check for a higher then normal priority. */
233 case '1':
234 case '2':
235 $priority_string = _("High");
236 break;
237
238 /* Check for a lower then normal priority. */
239 case '4':
240 case '5':
241 $priority_string = _("Low");
242 break;
243
244 /* Check for a normal priority. */
245 case '3':
246 default:
247 $priority_level = '3';
248 $priority_string = _("Normal");
249 break;
250
251 }
252 return $priority_string;
f792c641 253}
254
451f74a2 255/* returns a $message object for a particular entity id */
256function getEntity ($message, $ent_id) {
a4a70693 257 return $message->getEntity($ent_id);
451f74a2 258}
8beafbbc 259
3d8371be 260/* translateText
02474e43 261* Extracted from strings.php 23/03/2002
262*/
da4c66e8 263
264function translateText(&$body, $wrap_at, $charset) {
3d8371be 265 global $where, $what; /* from searching */
266 global $color; /* color theme */
da4c66e8 267
b68edc75 268 require_once(SM_PATH . 'functions/url_parser.php');
da4c66e8 269
270 $body_ary = explode("\n", $body);
da4c66e8 271 for ($i=0; $i < count($body_ary); $i++) {
272 $line = $body_ary[$i];
273 if (strlen($line) - 2 >= $wrap_at) {
c7aff938 274 sqWordWrap($line, $wrap_at, $charset);
da4c66e8 275 }
276 $line = charset_decode($charset, $line);
277 $line = str_replace("\t", ' ', $line);
278
279 parseUrl ($line);
280
3d8371be 281 $quotes = 0;
da4c66e8 282 $pos = 0;
3d8371be 283 $j = strlen($line);
da4c66e8 284
3d8371be 285 while ($pos < $j) {
da4c66e8 286 if ($line[$pos] == ' ') {
3d8371be 287 $pos++;
da4c66e8 288 } else if (strpos($line, '&gt;', $pos) === $pos) {
289 $pos += 4;
3d8371be 290 $quotes++;
da4c66e8 291 } else {
292 break;
293 }
294 }
3d8371be 295
83c94382 296 if ($quotes % 2) {
3d8371be 297 if (!isset($color[13])) {
da4c66e8 298 $color[13] = '#800000';
299 }
4c25967c 300 $line = '<font color="' . $color[13] . '">' . $line . '</font>';
301 } elseif ($quotes) {
302 if (!isset($color[14])) {
303 $color[14] = '#FF0000';
304 }
305 $line = '<font color="' . $color[14] . '">' . $line . '</font>';
da4c66e8 306 }
3d8371be 307
da4c66e8 308 $body_ary[$i] = $line;
309 }
310 $body = '<pre>' . implode("\n", $body_ary) . '</pre>';
311}
312
a2bfcbce 313/**
da1b55ad 314 * This returns a parsed string called $body. That string can then
315 * be displayed as the actual message in the HTML. It contains
316 * everything needed, including HTML Tags, Attachments at the
317 * bottom, etc.
f8a1ed5a 318 *
da1b55ad 319 * Since 1.2.0 function uses message_body hook.
320 * Till 1.3.0 function included output of formatAttachments().
321 *
322 * @param resource $imap_stream imap connection resource
323 * @param object $message squirrelmail message object
324 * @param array $color squirrelmail color theme array
325 * @param integer $wrap_at number of characters per line
326 * @param string $ent_num (since 1.3.0) message part id
327 * @param integer $id (since 1.3.0) message id
328 * @param string $mailbox (since 1.3.0) imap folder name
329 * @param boolean $clean (since 1.5.1) Do not output stuff that's irrelevant for the printable version.
330 * @return string html formated message text
331 */
a2bfcbce 332function formatBody($imap_stream, $message, $color, $wrap_at, $ent_num, $id, $mailbox='INBOX', $clean=FALSE) {
3d8371be 333 /* This if statement checks for the entity to show as the
02474e43 334 * primary message. To add more of them, just put them in the
335 * order that is their priority.
336 */
ce68b76b 337 global $startMessage, $languages, $squirrelmail_language,
2c25d36a 338 $show_html_default, $sort, $has_unsafe_images, $passed_ent_id, $use_iframe,$iframe_height;
339
340 // workaround for not updated config.php
341 if (! isset($use_iframe)) $use_iframe = false;
77bfbd2e 342
5262d9a6 343 if( !sqgetGlobalVar('view_unsafe_images', $view_unsafe_images, SQ_GET) ) {
344 $view_unsafe_images = false;
77bfbd2e 345 }
d03c24f4 346
cc34b00d 347 $body = '';
23bcec6f 348 $urlmailbox = urlencode($mailbox);
451f74a2 349 $body_message = getEntity($message, $ent_num);
350 if (($body_message->header->type0 == 'text') ||
351 ($body_message->header->type0 == 'rfc822')) {
3d8371be 352 $body = mime_fetch_body ($imap_stream, $id, $ent_num);
451f74a2 353 $body = decodeBody($body, $body_message->header->encoding);
e842b215 354
355 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
33a55f5a 356 function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_decode')) {
e842b215 357 if (mb_detect_encoding($body) != 'ASCII') {
33a55f5a 358 $body = call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_decode',$body);
e842b215 359 }
360 }
451f74a2 361 $hookResults = do_hook("message_body", $body);
362 $body = $hookResults[1];
23bcec6f 363
3d8371be 364 /* If there are other types that shouldn't be formatted, add
02474e43 365 * them here.
366 */
3d8371be 367
451f74a2 368 if ($body_message->header->type1 == 'html') {
3d8371be 369 if ($show_html_default <> 1) {
85015544 370 $entity_conv = array('&nbsp;' => ' ',
02474e43 371 '<p>' => "\n",
372 '<P>' => "\n",
373 '<br>' => "\n",
374 '<BR>' => "\n",
375 '<br />' => "\n",
376 '<BR />' => "\n",
377 '&gt;' => '>',
378 '&lt;' => '<');
85015544 379 $body = strtr($body, $entity_conv);
3d8371be 380 $body = strip_tags($body);
85015544 381 $body = trim($body);
382 translateText($body, $wrap_at,
02474e43 383 $body_message->header->getParameter('charset'));
2c25d36a 384 } elseif ($use_iframe && ! $clean) {
385 // $clean is used to remove iframe in printable view.
386
84410f31 387 /**
388 * If we don't add html message between iframe tags,
389 * we must detect unsafe images and modify $has_unsafe_images.
f8a1ed5a 390 */
84410f31 391 $html_body = magicHTML($body, $id, $message, $mailbox);
392
2c25d36a 393 // creating iframe url
394 $iframeurl=sqm_baseuri().'src/view_html.php?'
f8a1ed5a 395 . 'mailbox=' . $urlmailbox
2c25d36a 396 . '&amp;passed_id=' . $id
397 . '&amp;ent_id=' . $ent_num
398 . '&amp;view_unsafe_images=' . (int) $view_unsafe_images;
399
400 // adding warning message
401 $body = html_tag('div',_("Viewing HTML formatted email"),'center');
402
403 /**
f8a1ed5a 404 * height can't be set to 100%, because it does not work as expected when
405 * iframe is inside the table. Browsers do not create full height objects
406 * even when iframe is not nested. Maybe there is some way to get full size
2c25d36a 407 * with CSS. Tested in firefox 1.02 and opera 7.53
408 *
409 * width="100%" does not work as expected, when table width is not set (automatic)
410 *
411 * tokul: I think <iframe> are safer sandbox than <object>. Objects might
412 * need special handling for IE and IE6SP2.
413 */
414 $body.= "<div><iframe name=\"message_frame\" width=\"100%\" height=\"$iframe_height\" src=\"$iframeurl\""
415 .' frameborder="1" marginwidth="0" marginheight="0" scrolling="auto">' . "\n";
416
417 // Message for browsers without iframe support
f8a1ed5a 418 //$body.= _("Your browser does not support inline frames.
84410f31 419 // You can view HTML formated message by following below link.");
f8a1ed5a 420 //$body.= "<br /><a href=\"$iframeurl\">"._("View HTML Message")."</a>";
84410f31 421
422 // if browser can't render iframe, it renders html message.
423 $body.= $html_body;
2c25d36a 424
425 // close iframe
426 $body.="</iframe></div>\n";
a3daaaf3 427 } else {
2c25d36a 428 // old way of html rendering
f8a1ed5a 429 $body = magicHTML($body, $id, $message, $mailbox);
a3daaaf3 430 }
451f74a2 431 } else {
3d8371be 432 translateText($body, $wrap_at,
02474e43 433 $body_message->header->getParameter('charset'));
451f74a2 434 }
a2bfcbce 435
436 // if this is the clean display (i.e. printer friendly), stop here.
437 if ( $clean ) {
438 return $body;
439 }
440
83cf04bd 441 $link = 'passed_id=' . $id . '&amp;ent_id='.$ent_num.
08b7f7cc 442 '&amp;mailbox=' . $urlmailbox .'&amp;sort=' . $sort .
da2415c1 443 '&amp;startMessage=' . $startMessage . '&amp;show_more=0';
08b7f7cc 444 if (isset($passed_ent_id)) {
445 $link .= '&amp;passed_ent_id='.$passed_ent_id;
446 }
8d863f64 447 $body .= '<center><small><a href="download.php?absolute_dl=true&amp;' .
02474e43 448 $link . '">' . _("Download this as a file") . '</a>';
7aad7b77 449 if ($view_unsafe_images) {
23f617b8 450 $text = _("Hide Unsafe Images");
7aad7b77 451 } else {
08b7f7cc 452 if (isset($has_unsafe_images) && $has_unsafe_images) {
453 $link .= '&amp;view_unsafe_images=1';
454 $text = _("View Unsafe Images");
455 } else {
456 $text = '';
457 }
3d8371be 458 }
83cf04bd 459 if($text != '') {
460 $body .= '&nbsp;|&nbsp;<a href="read_body.php?' . $link . '">' . $text . '</a>';
461 }
3c621ba1 462 $body .= '</small></center><br />' . "\n";
3d8371be 463 }
464 return $body;
451f74a2 465}
b74ba498 466
da1b55ad 467/**
468 * Displays attachment links and information
da1b55ad 469 *
470 * Since 1.3.0 function is not included in formatBody() call.
471 *
472 * Since 1.0.2 uses attachment $type0/$type1 hook.
473 * Since 1.2.5 uses attachment $type0/* hook.
474 * Since 1.5.0 uses attachments_bottom hook.
f8a1ed5a 475 *
da1b55ad 476 * @param object $message SquirrelMail message object
477 * @param array $exclude_id message parts that are not attachments.
478 * @param string $mailbox mailbox name
479 * @param integer $id message id
480 * @return string html formated attachment information.
481 */
23bcec6f 482function formatAttachments($message, $exclude_id, $mailbox, $id) {
80dcd298 483 global $where, $what, $startMessage, $color, $passed_ent_id;
451f74a2 484
23bcec6f 485 $att_ar = $message->getAttachments($exclude_id);
451f74a2 486
23bcec6f 487 if (!count($att_ar)) return '';
2e25760a 488
8f5425ec 489 $attachments = '';
2e25760a 490
23bcec6f 491 $urlMailbox = urlencode($mailbox);
492
493 foreach ($att_ar as $att) {
fdc9d9b5 494 $ent = $att->entity_id;
2e25760a 495 $header = $att->header;
f0c4dc12 496 $type0 = strtolower($header->type0);
497 $type1 = strtolower($header->type1);
2e25760a 498 $name = '';
21dab2dc 499 $links['download link']['text'] = _("Download");
2c25d36a 500 $links['download link']['href'] = sqm_baseuri() .
6b04287c 501 "src/download.php?absolute_dl=true&amp;passed_id=$id&amp;mailbox=$urlMailbox&amp;ent_id=$ent";
2e25760a 502 if ($type0 =='message' && $type1 == 'rfc822') {
2c25d36a 503 $default_page = sqm_baseuri() . 'src/read_body.php';
2e25760a 504 $rfc822_header = $att->rfc822_header;
098ea084 505 $filename = $rfc822_header->subject;
6cc08d8b 506 if (trim( $filename ) == '') {
507 $filename = 'untitled-[' . $ent . ']' ;
08b7f7cc 508 }
2e25760a 509 $from_o = $rfc822_header->from;
510 if (is_object($from_o)) {
04ea844e 511 $from_name = decodeHeader($from_o->getAddress(false));
2e25760a 512 } else {
513 $from_name = _("Unknown sender");
f0c4dc12 514 }
3d8371be 515 $description = $from_name;
23bcec6f 516 } else {
2c25d36a 517 $default_page = sqm_baseuri() . 'src/download.php';
02474e43 518 $filename = $att->getFilename();
f810c0b2 519 if ($header->description) {
098ea084 520 $description = decodeHeader($header->description);
f810c0b2 521 } else {
3d8371be 522 $description = '';
523 }
2e25760a 524 }
525
526 $display_filename = $filename;
3d8371be 527 if (isset($passed_ent_id)) {
528 $passed_ent_id_link = '&amp;passed_ent_id='.$passed_ent_id;
529 } else {
530 $passed_ent_id_link = '';
531 }
532 $defaultlink = $default_page . "?startMessage=$startMessage"
02474e43 533 . "&amp;passed_id=$id&amp;mailbox=$urlMailbox"
534 . '&amp;ent_id='.$ent.$passed_ent_id_link;
2e25760a 535 if ($where && $what) {
02474e43 536 $defaultlink .= '&amp;where='. urlencode($where).'&amp;what='.urlencode($what);
2e25760a 537 }
21dab2dc 538
3d8371be 539 /* This executes the attachment hook with a specific MIME-type.
02474e43 540 * If that doesn't have results, it tries if there's a rule
541 * for a more generic type.
542 */
3d8371be 543 $hookresults = do_hook("attachment $type0/$type1", $links,
02474e43 544 $startMessage, $id, $urlMailbox, $ent, $defaultlink,
545 $display_filename, $where, $what);
3d8371be 546 if(count($hookresults[1]) <= 1) {
547 $hookresults = do_hook("attachment $type0/*", $links,
02474e43 548 $startMessage, $id, $urlMailbox, $ent, $defaultlink,
549 $display_filename, $where, $what);
2e25760a 550 }
451f74a2 551
3d8371be 552 $links = $hookresults[1];
553 $defaultlink = $hookresults[6];
77b88425 554
3c621ba1 555 $attachments .= '<tr><td>' .
556 '<a href="'.$defaultlink.'">'.decodeHeader($display_filename).'</a>&nbsp;</td>' .
557 '<td><small><b>' . show_readable_size($header->size) .
558 '</b>&nbsp;&nbsp;</small></td>' .
559 '<td><small>[ '.htmlspecialchars($type0).'/'.htmlspecialchars($type1).' ]&nbsp;</small></td>' .
560 '<td><small>';
f810c0b2 561 $attachments .= '<b>' . $description . '</b>';
3c621ba1 562 $attachments .= '</small></td><td><small>&nbsp;';
b74ba498 563
3d8371be 564 $skipspaces = 1;
565 foreach ($links as $val) {
566 if ($skipspaces) {
567 $skipspaces = 0;
2e25760a 568 } else {
569 $attachments .= '&nbsp;&nbsp;|&nbsp;&nbsp;';
77b88425 570 }
f8a1ed5a 571 $attachments .= '<a href="' . $val['href'] . '">'
572 . (isset($val['text']) && !empty($val['text']) ? $val['text'] : '')
573 . (isset($val['extra']) && !empty($val['extra']) ? $val['extra'] : '')
2c25d36a 574 . '</a>';
2e25760a 575 }
3d8371be 576 unset($links);
3c621ba1 577 $attachments .= "</td></tr>\n";
2e25760a 578 }
9ad17edb 579 $attachmentadd = do_hook_function('attachments_bottom',$attachments);
580 if ($attachmentadd != '')
581 $attachments = $attachmentadd;
2e25760a 582 return $attachments;
451f74a2 583}
b74ba498 584
7c7b74b3 585function sqimap_base64_decode(&$string) {
7c0ec1d8 586
b17a8968 587 // Base64 encoded data goes in pairs of 4 bytes. To achieve on the
7c0ec1d8 588 // fly decoding (to reduce memory usage) you have to check if the
589 // data has incomplete pairs
590
b17a8968 591 // Remove the noise in order to check if the 4 bytes pairs are complete
7c0ec1d8 592 $string = str_replace(array("\r\n","\n", "\r", " "),array('','','',''),$string);
593
42ce44f8 594 $sStringRem = '';
7c0ec1d8 595 $iMod = strlen($string) % 4;
596 if ($iMod) {
597 $sStringRem = substr($string,-$iMod);
b17a8968 598 // Check if $sStringRem contains padding characters
7c0ec1d8 599 if (substr($sStringRem,-1) != '=') {
600 $string = substr($string,0,-$iMod);
601 } else {
602 $sStringRem = '';
603 }
604 }
7c7b74b3 605 $string = base64_decode($string);
7c0ec1d8 606 return $sStringRem;
7c7b74b3 607}
608
7c0ec1d8 609
3d8371be 610/* This function decodes the body depending on the encoding type. */
451f74a2 611function decodeBody($body, $encoding) {
3d8371be 612 global $show_html_default;
83be314a 613
b583c3e8 614 $body = str_replace("\r\n", "\n", $body);
615 $encoding = strtolower($encoding);
3d8371be 616
5166f86a 617 $encoding_handler = do_hook_function('decode_body', $encoding);
618
619
620 // plugins get first shot at decoding the body
621 //
622 if (!empty($encoding_handler) && function_exists($encoding_handler)) {
623 $body = $encoding_handler('decode', $body);
624
625 } else if ($encoding == 'quoted-printable' ||
3d8371be 626 $encoding == 'quoted_printable') {
b583c3e8 627 $body = quoted_printable_decode($body);
3d8371be 628
b583c3e8 629 while (ereg("=\n", $body)) {
630 $body = ereg_replace ("=\n", '', $body);
631 }
3d8371be 632
b583c3e8 633 } else if ($encoding == 'base64') {
634 $body = base64_decode($body);
635 }
3d8371be 636
b583c3e8 637 // All other encodings are returned raw.
3d8371be 638 return $body;
451f74a2 639}
640
9f7f68c3 641/**
02474e43 642* Decodes headers
643*
644* This functions decode strings that is encoded according to
645* RFC1522 (MIME Part Two: Message Header Extensions for Non-ASCII Text).
646* Patched by Christian Schmidt <christian@ostenfeld.dk> 23/03/2002
647*
648* @param string $string header string that has to be made readable
649* @param boolean $utfencode change message in order to be readable on user's charset. defaults to true
650* @param boolean $htmlsave preserve spaces and sanitize html special characters. defaults to true
651* @param boolean $decide decide if string can be utfencoded. defaults to false
652* @return string decoded header string
653*/
9f7f68c3 654function decodeHeader ($string, $utfencode=true,$htmlsave=true,$decide=false) {
d6f584fc 655 global $languages, $squirrelmail_language,$default_charset;
79e07c7e 656 if (is_array($string)) {
657 $string = implode("\n", $string);
658 }
da2415c1 659
10dec454 660 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
33a55f5a 661 function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_decodeheader')) {
662 $string = call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_decodeheader', $string);
08b7f7cc 663 // Do we need to return at this point?
664 // return $string;
83be314a 665 }
79e07c7e 666 $i = 0;
08b7f7cc 667 $iLastMatch = -2;
db65b6b0 668 $encoded = true;
0a06275a 669
098ea084 670 $aString = explode(' ',$string);
08b7f7cc 671 $ret = '';
098ea084 672 foreach ($aString as $chunk) {
358a78a1 673 if ($encoded && $chunk === '') {
08b7f7cc 674 continue;
358a78a1 675 } elseif ($chunk === '') {
08b7f7cc 676 $ret .= ' ';
677 continue;
678 }
098ea084 679 $encoded = false;
08b7f7cc 680 /* if encoded words are not separated by a linear-space-white we still catch them */
681 $j = $i-1;
7e6ca3e8 682
08b7f7cc 683 while ($match = preg_match('/^(.*)=\?([^?]*)\?(Q|B)\?([^?]*)\?=(.*)$/Ui',$chunk,$res)) {
684 /* if the last chunk isn't an encoded string then put back the space, otherwise don't */
685 if ($iLastMatch !== $j) {
686 if ($htmlsave) {
9f7f68c3 687 $ret .= '&#32;';
08b7f7cc 688 } else {
689 $ret .= ' ';
690 }
691 }
692 $iLastMatch = $i;
693 $j = $i;
cb718de0 694 if ($htmlsave) {
695 $ret .= htmlspecialchars($res[1]);
696 } else {
697 $ret .= $res[1];
698 }
098ea084 699 $encoding = ucfirst($res[3]);
d6f584fc 700
701 /* decide about valid decoding */
702 if ($decide && is_conversion_safe($res[2])) {
02474e43 703 $utfencode=true;
704 $can_be_encoded=true;
d6f584fc 705 } else {
02474e43 706 $can_be_encoded=false;
d6f584fc 707 }
098ea084 708 switch ($encoding)
709 {
710 case 'B':
711 $replace = base64_decode($res[4]);
fab65ca9 712 if ($utfencode) {
713 if ($can_be_encoded) {
714 /* convert string to different charset,
02474e43 715 * if functions asks for it (usually in compose)
716 */
fab65ca9 717 $ret .= charset_convert($res[2],$replace,$default_charset);
718 } else {
719 // convert string to html codes in order to display it
720 $ret .= charset_decode($res[2],$replace);
721 }
d6f584fc 722 } else {
fab65ca9 723 if ($htmlsave) {
724 $replace = htmlspecialchars($replace);
725 }
726 $ret.= $replace;
d6f584fc 727 }
098ea084 728 break;
729 case 'Q':
098ea084 730 $replace = str_replace('_', ' ', $res[4]);
da2415c1 731 $replace = preg_replace('/=([0-9a-f]{2})/ie', 'chr(hexdec("\1"))',
79e07c7e 732 $replace);
098ea084 733 if ($utfencode) {
02474e43 734 if ($can_be_encoded) {
d6f584fc 735 /* convert string to different charset,
02474e43 736 * if functions asks for it (usually in compose)
737 */
d6f584fc 738 $replace = charset_convert($res[2], $replace,$default_charset);
02474e43 739 } else {
d6f584fc 740 // convert string to html codes in order to display it
098ea084 741 $replace = charset_decode($res[2], $replace);
02474e43 742 }
098ea084 743 } else {
744 if ($htmlsave) {
c96c32f4 745 $replace = htmlspecialchars($replace);
098ea084 746 }
747 }
08b7f7cc 748 $ret .= $replace;
098ea084 749 break;
750 default:
751 break;
79e07c7e 752 }
098ea084 753 $chunk = $res[5];
754 $encoded = true;
08b7f7cc 755 }
756 if (!$encoded) {
757 if ($htmlsave) {
9f7f68c3 758 $ret .= '&#32;';
08b7f7cc 759 } else {
760 $ret .= ' ';
da2415c1 761 }
08b7f7cc 762 }
dc3d13a7 763
764 if (!$encoded && $htmlsave) {
765 $ret .= htmlspecialchars($chunk);
766 } else {
767 $ret .= $chunk;
768 }
098ea084 769 ++$i;
770 }
fd81e884 771 /* remove the first added space */
772 if ($ret) {
773 if ($htmlsave) {
9f7f68c3 774 $ret = substr($ret,5);
fd81e884 775 } else {
776 $ret = substr($ret,1);
777 }
778 }
da2415c1 779
08b7f7cc 780 return $ret;
451f74a2 781}
782
9f7f68c3 783/**
02474e43 784* Encodes header as quoted-printable
785*
786* Encode a string according to RFC 1522 for use in headers if it
787* contains 8-bit characters or anything that looks like it should
788* be encoded.
789*
790* @param string $string header string, that has to be encoded
791* @return string quoted-printable encoded string
792*/
451f74a2 793function encodeHeader ($string) {
6fbd125b 794 global $default_charset, $languages, $squirrelmail_language;
83be314a 795
10dec454 796 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
33a55f5a 797 function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_encodeheader')) {
798 return call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_encodeheader', $string);
83be314a 799 }
793cc001 800
451f74a2 801 // Encode only if the string contains 8-bit characters or =?
3d8371be 802 $j = strlen($string);
098ea084 803 $max_l = 75 - strlen($default_charset) - 7;
804 $aRet = array();
451f74a2 805 $ret = '';
c96c32f4 806 $iEncStart = $enc_init = false;
0d53f0f9 807 $cur_l = $iOffset = 0;
3d8371be 808 for($i = 0; $i < $j; ++$i) {
c96c32f4 809 switch($string{$i})
810 {
811 case '=':
812 case '<':
813 case '>':
814 case ',':
815 case '?':
816 case '_':
817 if ($iEncStart === false) {
818 $iEncStart = $i;
819 }
820 $cur_l+=3;
821 if ($cur_l > ($max_l-2)) {
08b7f7cc 822 /* if there is an stringpart that doesn't need encoding, add it */
c96c32f4 823 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
824 $aRet[] = "=?$default_charset?Q?$ret?=";
825 $iOffset = $i;
826 $cur_l = 0;
827 $ret = '';
828 $iEncStart = false;
829 } else {
830 $ret .= sprintf("=%02X",ord($string{$i}));
831 }
832 break;
833 case '(':
834 case ')':
835 if ($iEncStart !== false) {
08b7f7cc 836 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
c96c32f4 837 $aRet[] = "=?$default_charset?Q?$ret?=";
838 $iOffset = $i;
839 $cur_l = 0;
840 $ret = '';
841 $iEncStart = false;
842 }
843 break;
844 case ' ':
845 if ($iEncStart !== false) {
098ea084 846 $cur_l++;
847 if ($cur_l > $max_l) {
08b7f7cc 848 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
c96c32f4 849 $aRet[] = "=?$default_charset?Q?$ret?=";
850 $iOffset = $i;
851 $cur_l = 0;
852 $ret = '';
853 $iEncStart = false;
08b7f7cc 854 } else {
c96c32f4 855 $ret .= '_';
856 }
857 }
858 break;
859 default:
860 $k = ord($string{$i});
861 if ($k > 126) {
862 if ($iEncStart === false) {
325978ac 863 // do not start encoding in the middle of a string, also take the rest of the word.
864 $sLeadString = substr($string,0,$i);
865 $aLeadString = explode(' ',$sLeadString);
da2415c1 866 $sToBeEncoded = array_pop($aLeadString);
325978ac 867 $iEncStart = $i - strlen($sToBeEncoded);
868 $ret .= $sToBeEncoded;
869 $cur_l += strlen($sToBeEncoded);
c96c32f4 870 }
871 $cur_l += 3;
08b7f7cc 872 /* first we add the encoded string that reached it's max size */
c96c32f4 873 if ($cur_l > ($max_l-2)) {
08b7f7cc 874 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
875 $aRet[] = "=?$default_charset?Q?$ret?= "; /* the next part is also encoded => separate by space */
c96c32f4 876 $cur_l = 3;
877 $ret = '';
878 $iOffset = $i;
08b7f7cc 879 $iEncStart = $i;
c96c32f4 880 }
08b7f7cc 881 $enc_init = true;
c96c32f4 882 $ret .= sprintf("=%02X", $k);
883 } else {
884 if ($iEncStart !== false) {
098ea084 885 $cur_l++;
886 if ($cur_l > $max_l) {
08b7f7cc 887 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
c96c32f4 888 $aRet[] = "=?$default_charset?Q?$ret?=";
889 $iEncStart = false;
890 $iOffset = $i;
891 $cur_l = 0;
098ea084 892 $ret = '';
08b7f7cc 893 } else {
c96c32f4 894 $ret .= $string{$i};
895 }
3d8371be 896 }
c96c32f4 897 }
898 break;
f7b3ba37 899 }
451f74a2 900 }
793cc001 901
c96c32f4 902 if ($enc_init) {
903 if ($iEncStart !== false) {
904 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
905 $aRet[] = "=?$default_charset?Q?$ret?=";
906 } else {
907 $aRet[] = substr($string,$iOffset);
908 }
909 $string = implode('',$aRet);
451f74a2 910 }
3d8371be 911 return $string;
451f74a2 912}
b74ba498 913
691a2d25 914/* This function trys to locate the entity_id of a specific mime element */
3d8371be 915function find_ent_id($id, $message) {
a171b359 916 for ($i = 0, $ret = ''; $ret == '' && $i < count($message->entities); $i++) {
917 if ($message->entities[$i]->header->type0 == 'multipart') {
3d8371be 918 $ret = find_ent_id($id, $message->entities[$i]);
451f74a2 919 } else {
3d8371be 920 if (strcasecmp($message->entities[$i]->header->id, $id) == 0) {
d8cffbab 921// if (sq_check_save_extension($message->entities[$i])) {
a171b359 922 return $message->entities[$i]->entity_id;
da2415c1 923// }
c8f5f606 924 } elseif (!empty($message->entities[$i]->header->parameters['name'])) {
925 /**
926 * This is part of a fix for Outlook Express 6.x generating
927 * cid URLs without creating content-id headers
928 * @@JA - 20050207
929 */
930 if (strcasecmp($message->entities[$i]->header->parameters['name'], $id) == 0) {
931 return $message->entities[$i]->entity_id;
932 }
3d8371be 933 }
a3daaaf3 934 }
451f74a2 935 }
3d8371be 936 return $ret;
451f74a2 937}
a3daaaf3 938
e5e9381a 939function sq_check_save_extension($message) {
940 $filename = $message->getFilename();
941 $ext = substr($filename, strrpos($filename,'.')+1);
942 $save_extensions = array('jpg','jpeg','gif','png','bmp');
3d8371be 943 return in_array($ext, $save_extensions);
e5e9381a 944}
945
946
691a2d25 947/**
02474e43 948** HTMLFILTER ROUTINES
949*/
451f74a2 950
691a2d25 951/**
02474e43 952* This function is more or less a wrapper around stripslashes. Apparently
953* Explorer is stupid enough to just remove the backslashes and then
954* execute the content of the attribute as if nothing happened.
955* Who does that?
956*
957* @param attvalue The value of the attribute
958* @return attvalue The value of the attribute stripslashed.
959*/
2dd879b8 960function sq_unbackslash($attvalue){
961 /**
02474e43 962 * Remove any backslashes. See if there are any first.
963 */
91220ed1 964
2dd879b8 965 if (strstr($attvalue, '\\') !== false){
966 $attvalue = stripslashes($attvalue);
967 }
968 return $attvalue;
969}
970
971/**
02474e43 972* Kill any tabs, newlines, or carriage returns. Our friends the
973* makers of the browser with 95% market value decided that it'd
974* be funny to make "java[tab]script" be just as good as "javascript".
975*
976* @param attvalue The attribute value before extraneous spaces removed.
977* @return attvalue The attribute value after extraneous spaces removed.
978*/
2dd879b8 979function sq_unspace($attvalue){
980 if (strcspn($attvalue, "\t\r\n") != strlen($attvalue)){
981 $attvalue = str_replace(Array("\t", "\r", "\n"), Array('', '', ''),
982 $attvalue);
983 }
984 return $attvalue;
985}
986
987/**
02474e43 988* This function returns the final tag out of the tag name, an array
989* of attributes, and the type of the tag. This function is called by
990* sq_sanitize internally.
991*
992* @param $tagname the name of the tag.
993* @param $attary the array of attributes and their values
994* @param $tagtype The type of the tag (see in comments).
995* @return a string with the final tag representation.
996*/
691a2d25 997function sq_tagprint($tagname, $attary, $tagtype){
b583c3e8 998 $me = 'sq_tagprint';
3d8371be 999
691a2d25 1000 if ($tagtype == 2){
1001 $fulltag = '</' . $tagname . '>';
1002 } else {
1003 $fulltag = '<' . $tagname;
1004 if (is_array($attary) && sizeof($attary)){
1005 $atts = Array();
1006 while (list($attname, $attvalue) = each($attary)){
1007 array_push($atts, "$attname=$attvalue");
1008 }
1009 $fulltag .= ' ' . join(" ", $atts);
1010 }
1011 if ($tagtype == 3){
b583c3e8 1012 $fulltag .= ' /';
691a2d25 1013 }
b583c3e8 1014 $fulltag .= '>';
451f74a2 1015 }
691a2d25 1016 return $fulltag;
451f74a2 1017}
a3daaaf3 1018
691a2d25 1019/**
02474e43 1020* A small helper function to use with array_walk. Modifies a by-ref
1021* value and makes it lowercase.
1022*
1023* @param $val a value passed by-ref.
1024* @return void since it modifies a by-ref value.
1025*/
691a2d25 1026function sq_casenormalize(&$val){
1027 $val = strtolower($val);
1028}
451f74a2 1029
691a2d25 1030/**
02474e43 1031* This function skips any whitespace from the current position within
1032* a string and to the next non-whitespace value.
1033*
1034* @param $body the string
1035* @param $offset the offset within the string where we should start
1036* looking for the next non-whitespace character.
1037* @return the location within the $body where the next
1038* non-whitespace char is located.
1039*/
691a2d25 1040function sq_skipspace($body, $offset){
b583c3e8 1041 $me = 'sq_skipspace';
3d8371be 1042 preg_match('/^(\s*)/s', substr($body, $offset), $matches);
691a2d25 1043 if (sizeof($matches{1})){
1044 $count = strlen($matches{1});
1045 $offset += $count;
451f74a2 1046 }
691a2d25 1047 return $offset;
451f74a2 1048}
a3daaaf3 1049
691a2d25 1050/**
02474e43 1051* This function looks for the next character within a string. It's
1052* really just a glorified "strpos", except it catches if failures
1053* nicely.
1054*
1055* @param $body The string to look for needle in.
1056* @param $offset Start looking from this position.
1057* @param $needle The character/string to look for.
1058* @return location of the next occurance of the needle, or
1059* strlen($body) if needle wasn't found.
1060*/
691a2d25 1061function sq_findnxstr($body, $offset, $needle){
3d8371be 1062 $me = 'sq_findnxstr';
691a2d25 1063 $pos = strpos($body, $needle, $offset);
1064 if ($pos === FALSE){
1065 $pos = strlen($body);
451f74a2 1066 }
691a2d25 1067 return $pos;
451f74a2 1068}
a3daaaf3 1069
691a2d25 1070/**
02474e43 1071* This function takes a PCRE-style regexp and tries to match it
1072* within the string.
1073*
1074* @param $body The string to look for needle in.
1075* @param $offset Start looking from here.
1076* @param $reg A PCRE-style regex to match.
1077* @return Returns a false if no matches found, or an array
1078* with the following members:
1079* - integer with the location of the match within $body
1080* - string with whatever content between offset and the match
1081* - string with whatever it is we matched
1082*/
691a2d25 1083function sq_findnxreg($body, $offset, $reg){
b583c3e8 1084 $me = 'sq_findnxreg';
691a2d25 1085 $matches = Array();
1086 $retarr = Array();
7d06541f 1087 preg_match("%^(.*?)($reg)%si", substr($body, $offset), $matches);
1088 if (!isset($matches{0}) || !$matches{0}){
691a2d25 1089 $retarr = false;
1090 } else {
1091 $retarr{0} = $offset + strlen($matches{1});
1092 $retarr{1} = $matches{1};
1093 $retarr{2} = $matches{2};
1094 }
1095 return $retarr;
1096}
a3daaaf3 1097
691a2d25 1098/**
02474e43 1099* This function looks for the next tag.
1100*
1101* @param $body String where to look for the next tag.
1102* @param $offset Start looking from here.
1103* @return false if no more tags exist in the body, or
1104* an array with the following members:
1105* - string with the name of the tag
1106* - array with attributes and their values
1107* - integer with tag type (1, 2, or 3)
1108* - integer where the tag starts (starting "<")
1109* - integer where the tag ends (ending ">")
1110* first three members will be false, if the tag is invalid.
1111*/
691a2d25 1112function sq_getnxtag($body, $offset){
b583c3e8 1113 $me = 'sq_getnxtag';
691a2d25 1114 if ($offset > strlen($body)){
1115 return false;
1116 }
1117 $lt = sq_findnxstr($body, $offset, "<");
1118 if ($lt == strlen($body)){
1119 return false;
1120 }
1121 /**
02474e43 1122 * We are here:
1123 * blah blah <tag attribute="value">
1124 * \---------^
1125 */
691a2d25 1126 $pos = sq_skipspace($body, $lt+1);
1127 if ($pos >= strlen($body)){
1128 return Array(false, false, false, $lt, strlen($body));
1129 }
1130 /**
02474e43 1131 * There are 3 kinds of tags:
1132 * 1. Opening tag, e.g.:
1133 * <a href="blah">
1134 * 2. Closing tag, e.g.:
1135 * </a>
1136 * 3. XHTML-style content-less tag, e.g.:
1137 * <img src="blah" />
1138 */
691a2d25 1139 $tagtype = false;
1140 switch (substr($body, $pos, 1)){
3d8371be 1141 case '/':
1142 $tagtype = 2;
1143 $pos++;
1144 break;
1145 case '!':
1146 /**
02474e43 1147 * A comment or an SGML declaration.
1148 */
3d8371be 1149 if (substr($body, $pos+1, 2) == "--"){
1150 $gt = strpos($body, "-->", $pos);
1151 if ($gt === false){
1152 $gt = strlen($body);
1153 } else {
1154 $gt += 2;
1155 }
1156 return Array(false, false, false, $lt, $gt);
bb8d0799 1157 } else {
3d8371be 1158 $gt = sq_findnxstr($body, $pos, ">");
1159 return Array(false, false, false, $lt, $gt);
1160 }
1161 break;
1162 default:
1163 /**
02474e43 1164 * Assume tagtype 1 for now. If it's type 3, we'll switch values
1165 * later.
1166 */
3d8371be 1167 $tagtype = 1;
1168 break;
691a2d25 1169 }
a3daaaf3 1170
691a2d25 1171 $tagname = '';
1172 /**
02474e43 1173 * Look for next [\W-_], which will indicate the end of the tag name.
1174 */
691a2d25 1175 $regary = sq_findnxreg($body, $pos, "[^\w\-_]");
1176 if ($regary == false){
1177 return Array(false, false, false, $lt, strlen($body));
1178 }
1179 list($pos, $tagname, $match) = $regary;
1180 $tagname = strtolower($tagname);
1181
1182 /**
02474e43 1183 * $match can be either of these:
1184 * '>' indicating the end of the tag entirely.
1185 * '\s' indicating the end of the tag name.
1186 * '/' indicating that this is type-3 xhtml tag.
1187 *
1188 * Whatever else we find there indicates an invalid tag.
1189 */
691a2d25 1190 switch ($match){
3d8371be 1191 case '/':
691a2d25 1192 /**
02474e43 1193 * This is an xhtml-style tag with a closing / at the
1194 * end, like so: <img src="blah" />. Check if it's followed
1195 * by the closing bracket. If not, then this tag is invalid
1196 */
3d8371be 1197 if (substr($body, $pos, 2) == "/>"){
1198 $pos++;
1199 $tagtype = 3;
1200 } else {
1201 $gt = sq_findnxstr($body, $pos, ">");
1202 $retary = Array(false, false, false, $lt, $gt);
1203 return $retary;
1204 }
1205 case '>':
1206 return Array($tagname, false, $tagtype, $lt, $pos);
1207 break;
1208 default:
1209 /**
02474e43 1210 * Check if it's whitespace
1211 */
3d8371be 1212 if (!preg_match('/\s/', $match)){
1213 /**
02474e43 1214 * This is an invalid tag! Look for the next closing ">".
1215 */
7d06541f 1216 $gt = sq_findnxstr($body, $lt, ">");
3d8371be 1217 return Array(false, false, false, $lt, $gt);
1218 }
1219 break;
691a2d25 1220 }
3d8371be 1221
691a2d25 1222 /**
02474e43 1223 * At this point we're here:
1224 * <tagname attribute='blah'>
1225 * \-------^
1226 *
1227 * At this point we loop in order to find all attributes.
1228 */
691a2d25 1229 $attname = '';
691a2d25 1230 $attary = Array();
1231
1232 while ($pos <= strlen($body)){
1233 $pos = sq_skipspace($body, $pos);
1234 if ($pos == strlen($body)){
1235 /**
02474e43 1236 * Non-closed tag.
1237 */
691a2d25 1238 return Array(false, false, false, $lt, $pos);
1239 }
1240 /**
02474e43 1241 * See if we arrived at a ">" or "/>", which means that we reached
1242 * the end of the tag.
1243 */
691a2d25 1244 $matches = Array();
164800ad 1245 if (preg_match("%^(\s*)(>|/>)%s", substr($body, $pos), $matches)) {
c828931c 1246 /**
02474e43 1247 * Yep. So we did.
1248 */
c828931c 1249 $pos += strlen($matches{1});
1250 if ($matches{2} == "/>"){
1251 $tagtype = 3;
1252 $pos++;
1253 }
1254 return Array($tagname, $attary, $tagtype, $lt, $pos);
1255 }
a3daaaf3 1256
cca46357 1257 /**
02474e43 1258 * There are several types of attributes, with optional
1259 * [:space:] between members.
1260 * Type 1:
1261 * attrname[:space:]=[:space:]'CDATA'
1262 * Type 2:
1263 * attrname[:space:]=[:space:]"CDATA"
1264 * Type 3:
1265 * attr[:space:]=[:space:]CDATA
1266 * Type 4:
1267 * attrname
1268 *
1269 * We leave types 1 and 2 the same, type 3 we check for
1270 * '"' and convert to "&quot" if needed, then wrap in
1271 * double quotes. Type 4 we convert into:
1272 * attrname="yes".
1273 */
3f7c623f 1274 $regary = sq_findnxreg($body, $pos, "[^:\w\-_]");
691a2d25 1275 if ($regary == false){
1276 /**
02474e43 1277 * Looks like body ended before the end of tag.
1278 */
691a2d25 1279 return Array(false, false, false, $lt, strlen($body));
cca46357 1280 }
691a2d25 1281 list($pos, $attname, $match) = $regary;
1282 $attname = strtolower($attname);
1283 /**
02474e43 1284 * We arrived at the end of attribute name. Several things possible
1285 * here:
1286 * '>' means the end of the tag and this is attribute type 4
1287 * '/' if followed by '>' means the same thing as above
1288 * '\s' means a lot of things -- look what it's followed by.
1289 * anything else means the attribute is invalid.
1290 */
691a2d25 1291 switch($match){
3d8371be 1292 case '/':
691a2d25 1293 /**
02474e43 1294 * This is an xhtml-style tag with a closing / at the
1295 * end, like so: <img src="blah" />. Check if it's followed
1296 * by the closing bracket. If not, then this tag is invalid
1297 */
3d8371be 1298 if (substr($body, $pos, 2) == "/>"){
691a2d25 1299 $pos++;
3d8371be 1300 $tagtype = 3;
691a2d25 1301 } else {
3d8371be 1302 $gt = sq_findnxstr($body, $pos, ">");
1303 $retary = Array(false, false, false, $lt, $gt);
1304 return $retary;
1305 }
1306 case '>':
1307 $attary{$attname} = '"yes"';
1308 return Array($tagname, $attary, $tagtype, $lt, $pos);
1309 break;
1310 default:
1311 /**
02474e43 1312 * Skip whitespace and see what we arrive at.
1313 */
3d8371be 1314 $pos = sq_skipspace($body, $pos);
1315 $char = substr($body, $pos, 1);
1316 /**
02474e43 1317 * Two things are valid here:
1318 * '=' means this is attribute type 1 2 or 3.
1319 * \w means this was attribute type 4.
1320 * anything else we ignore and re-loop. End of tag and
1321 * invalid stuff will be caught by our checks at the beginning
1322 * of the loop.
1323 */
3d8371be 1324 if ($char == "="){
1325 $pos++;
1326 $pos = sq_skipspace($body, $pos);
691a2d25 1327 /**
02474e43 1328 * Here are 3 possibilities:
1329 * "'" attribute type 1
1330 * '"' attribute type 2
1331 * everything else is the content of tag type 3
1332 */
3d8371be 1333 $quot = substr($body, $pos, 1);
1334 if ($quot == "'"){
1335 $regary = sq_findnxreg($body, $pos+1, "\'");
1336 if ($regary == false){
1337 return Array(false, false, false, $lt, strlen($body));
1338 }
1339 list($pos, $attval, $match) = $regary;
1340 $pos++;
1341 $attary{$attname} = "'" . $attval . "'";
1342 } else if ($quot == '"'){
1343 $regary = sq_findnxreg($body, $pos+1, '\"');
1344 if ($regary == false){
1345 return Array(false, false, false, $lt, strlen($body));
1346 }
1347 list($pos, $attval, $match) = $regary;
1348 $pos++;
1349 $attary{$attname} = '"' . $attval . '"';
1350 } else {
1351 /**
02474e43 1352 * These are hateful. Look for \s, or >.
1353 */
3d8371be 1354 $regary = sq_findnxreg($body, $pos, "[\s>]");
1355 if ($regary == false){
1356 return Array(false, false, false, $lt, strlen($body));
1357 }
1358 list($pos, $attval, $match) = $regary;
1359 /**
02474e43 1360 * If it's ">" it will be caught at the top.
1361 */
3d8371be 1362 $attval = preg_replace("/\"/s", "&quot;", $attval);
1363 $attary{$attname} = '"' . $attval . '"';
7e235a1a 1364 }
3d8371be 1365 } else if (preg_match("|[\w/>]|", $char)) {
691a2d25 1366 /**
02474e43 1367 * That was attribute type 4.
1368 */
3d8371be 1369 $attary{$attname} = '"yes"';
1370 } else {
1371 /**
02474e43 1372 * An illegal character. Find next '>' and return.
1373 */
3d8371be 1374 $gt = sq_findnxstr($body, $pos, ">");
1375 return Array(false, false, false, $lt, $gt);
451f74a2 1376 }
3d8371be 1377 break;
691a2d25 1378 }
1379 }
1380 /**
02474e43 1381 * The fact that we got here indicates that the tag end was never
1382 * found. Return invalid tag indication so it gets stripped.
1383 */
691a2d25 1384 return Array(false, false, false, $lt, strlen($body));
1385}
1386
1387/**
02474e43 1388* This function checks attribute values for entity-encoded values
1389* and returns them translated into 8-bit strings so we can run
1390* checks on them.
1391*
1392* @param $attvalue A string to run entity check against.
1393* @return Translated value.
1394*/
91220ed1 1395
691a2d25 1396function sq_deent($attvalue){
b583c3e8 1397 $me = 'sq_deent';
691a2d25 1398 /**
02474e43 1399 * See if we have to run the checks first. All entities must start
1400 * with "&".
1401 */
91220ed1 1402 if (strpos($attvalue, '&') === false){
691a2d25 1403 return $attvalue;
1404 }
1405 /**
02474e43 1406 * Check named entities first.
1407 */
691a2d25 1408 $trans = get_html_translation_table(HTML_ENTITIES);
1409 /**
02474e43 1410 * Leave &quot; in, as it can mess us up.
1411 */
691a2d25 1412 $trans = array_flip($trans);
91220ed1 1413 unset($trans{'&quot;'});
691a2d25 1414 while (list($ent, $val) = each($trans)){
91220ed1 1415 $attvalue = preg_replace('/' . $ent . '*/si', $val, $attvalue);
691a2d25 1416 }
1417 /**
02474e43 1418 * Now translate numbered entities from 1 to 255 if needed.
1419 */
91220ed1 1420 if (strpos($attvalue, '#') !== false){
691a2d25 1421 $omit = Array(34, 39);
91220ed1 1422 for ($asc = 256; $asc >= 0; $asc--){
691a2d25 1423 if (!in_array($asc, $omit)){
1424 $chr = chr($asc);
91220ed1 1425 $octrule = '/\&#0*' . $asc . ';*/si';
1426 $hexrule = '/\&#x0*' . dechex($asc) . ';*/si';
1427 $attvalue = preg_replace($octrule, $chr, $attvalue);
1428 $attvalue = preg_replace($hexrule, $chr, $attvalue);
a3daaaf3 1429 }
691a2d25 1430 }
1431 }
1432 return $attvalue;
1433}
1434
1435/**
02474e43 1436* This function runs various checks against the attributes.
1437*
1438* @param $tagname String with the name of the tag.
1439* @param $attary Array with all tag attributes.
1440* @param $rm_attnames See description for sq_sanitize
1441* @param $bad_attvals See description for sq_sanitize
1442* @param $add_attr_to_tag See description for sq_sanitize
1443* @param $message message object
1444* @param $id message id
1445* @return Array with modified attributes.
1446*/
da2415c1 1447function sq_fixatts($tagname,
1448 $attary,
691a2d25 1449 $rm_attnames,
1450 $bad_attvals,
1451 $add_attr_to_tag,
1452 $message,
b3af12ef 1453 $id,
3d8371be 1454 $mailbox
691a2d25 1455 ){
b583c3e8 1456 $me = 'sq_fixatts';
691a2d25 1457 while (list($attname, $attvalue) = each($attary)){
1458 /**
02474e43 1459 * See if this attribute should be removed.
1460 */
691a2d25 1461 foreach ($rm_attnames as $matchtag=>$matchattrs){
1462 if (preg_match($matchtag, $tagname)){
1463 foreach ($matchattrs as $matchattr){
1464 if (preg_match($matchattr, $attname)){
1465 unset($attary{$attname});
1466 continue;
1467 }
451f74a2 1468 }
451f74a2 1469 }
691a2d25 1470 }
1471 /**
02474e43 1472 * Remove any backslashes, entities, and extraneous whitespace.
1473 */
2dd879b8 1474 $attvalue = sq_unbackslash($attvalue);
691a2d25 1475 $attvalue = sq_deent($attvalue);
2dd879b8 1476 $attvalue = sq_unspace($attvalue);
691a2d25 1477
1478 /**
02474e43 1479 * Remove \r \n \t \0 " " "\\"
1480 */
8d863f64 1481 $attvalue = str_replace(Array("\r", "\n", "\t", "\0", " ", "\\"),
af861a34 1482 Array('', '','','','',''), $attvalue);
1483
1484 /**
02474e43 1485 * Now let's run checks on the attvalues.
1486 * I don't expect anyone to comprehend this. If you do,
1487 * get in touch with me so I can drive to where you live and
1488 * shake your hand personally. :)
1489 */
691a2d25 1490 foreach ($bad_attvals as $matchtag=>$matchattrs){
1491 if (preg_match($matchtag, $tagname)){
1492 foreach ($matchattrs as $matchattr=>$valary){
1493 if (preg_match($matchattr, $attname)){
1494 /**
02474e43 1495 * There are two arrays in valary.
1496 * First is matches.
1497 * Second one is replacements
1498 */
691a2d25 1499 list($valmatch, $valrepl) = $valary;
da2415c1 1500 $newvalue =
691a2d25 1501 preg_replace($valmatch, $valrepl, $attvalue);
1502 if ($newvalue != $attvalue){
1503 $attary{$attname} = $newvalue;
1504 }
1505 }
1506 }
451f74a2 1507 }
a3daaaf3 1508 }
834a1027 1509
1510
1511 /**
1512 * Replace empty src tags with the blank image. src is only used
1513 * for frames, images, and image inputs. Doing a replace should
1514 * not affect them working as should be, however it will stop
1515 * IE from being kicked off when src for img tags are not set
1516 */
5a6fde9e 1517 if (($attname == 'src') && ($attvalue == '""')) {
834a1027 1518 $attary{$attname} = '"' . SM_PATH . 'images/blank.png"';
1519 }
1520
691a2d25 1521 /**
02474e43 1522 * Turn cid: urls into http-friendly ones.
1523 */
691a2d25 1524 if (preg_match("/^[\'\"]\s*cid:/si", $attvalue)){
b3af12ef 1525 $attary{$attname} = sq_cid2http($message, $id, $attvalue, $mailbox);
691a2d25 1526 }
ff940ebc 1527
1528 /**
1529 * "Hack" fix for Outlook using propriatary outbind:// protocol in img tags.
1530 * One day MS might actually make it match something useful, for now, falling
1531 * back to using cid2http, so we can grab the blank.png.
1532 */
1533 if (preg_match("/^[\'\"]\s*outbind:\/\//si", $attvalue)) {
1534 $attary{$attname} = sq_cid2http($message, $id, $attvalue, $mailbox);
1535 }
1536
a3daaaf3 1537 }
691a2d25 1538 /**
02474e43 1539 * See if we need to append any attributes to this tag.
1540 */
691a2d25 1541 foreach ($add_attr_to_tag as $matchtag=>$addattary){
1542 if (preg_match($matchtag, $tagname)){
1543 $attary = array_merge($attary, $addattary);
1544 }
1545 }
1546 return $attary;
451f74a2 1547}
a3daaaf3 1548
691a2d25 1549/**
02474e43 1550* This function edits the style definition to make them friendly and
1551* usable in SquirrelMail.
1552*
1553* @param $message the message object
1554* @param $id the message id
1555* @param $content a string with whatever is between <style> and </style>
1556* @param $mailbox the message mailbox
1557* @return a string with edited content.
1558*/
e60a299a 1559function sq_fixstyle($body, $pos, $message, $id, $mailbox){
691a2d25 1560 global $view_unsafe_images;
b583c3e8 1561 $me = 'sq_fixstyle';
7d06541f 1562 $ret = sq_findnxreg($body, $pos, '</\s*style\s*>');
1563 if ($ret == FALSE){
1564 return array(FALSE, strlen($body));
1565 }
1566 $newpos = $ret[0] + strlen($ret[2]);
1567 $content = $ret[1];
691a2d25 1568 /**
02474e43 1569 * First look for general BODY style declaration, which would be
1570 * like so:
1571 * body {background: blah-blah}
1572 * and change it to .bodyclass so we can just assign it to a <div>
1573 */
691a2d25 1574 $content = preg_replace("|body(\s*\{.*?\})|si", ".bodyclass\\1", $content);
3d8371be 1575 $secremoveimg = '../images/' . _("sec_remove_eng.png");
691a2d25 1576 /**
02474e43 1577 * Fix url('blah') declarations.
1578 */
7d06541f 1579 $content = preg_replace("|url\s*\(\s*([\'\"])\s*\S+script\s*:.*?([\'\"])\s*\)|si",
691a2d25 1580 "url(\\1$secremoveimg\\2)", $content);
1581 /**
02474e43 1582 * Fix url('https*://.*) declarations but only if $view_unsafe_images
1583 * is false.
1584 */
691a2d25 1585 if (!$view_unsafe_images){
7d06541f 1586 $content = preg_replace("|url\s*\(\s*([\'\"])\s*https*:.*?([\'\"])\s*\)|si",
691a2d25 1587 "url(\\1$secremoveimg\\2)", $content);
1588 }
da2415c1 1589
691a2d25 1590 /**
02474e43 1591 * Fix urls that refer to cid:
1592 */
da2415c1 1593 while (preg_match("|url\s*\(\s*([\'\"]\s*cid:.*?[\'\"])\s*\)|si",
02474e43 1594 $content, $matches)){
691a2d25 1595 $cidurl = $matches{1};
e60a299a 1596 $httpurl = sq_cid2http($message, $id, $cidurl, $mailbox);
7d06541f 1597 $content = preg_replace("|url\s*\(\s*$cidurl\s*\)|si",
691a2d25 1598 "url($httpurl)", $content);
1599 }
a3daaaf3 1600
691a2d25 1601 /**
02474e43 1602 * Fix stupid css declarations which lead to vulnerabilities
1603 * in IE.
1604 */
f83c60a2 1605 $match = Array('/expression/i',
02474e43 1606 '/behaviou*r/i',
1607 '/binding/i',
1608 '/include-source/i');
2dd879b8 1609 $replace = Array('idiocy', 'idiocy', 'idiocy', 'idiocy');
bb8d0799 1610 $content = preg_replace($match, $replace, $content);
7d06541f 1611 return array($content, $newpos);
691a2d25 1612}
a3daaaf3 1613
691a2d25 1614/**
02474e43 1615* This function converts cid: url's into the ones that can be viewed in
1616* the browser.
1617*
1618* @param $message the message object
1619* @param $id the message id
1620* @param $cidurl the cid: url.
1621* @param $mailbox the message mailbox
1622* @return a string with a http-friendly url
1623*/
b3af12ef 1624function sq_cid2http($message, $id, $cidurl, $mailbox){
691a2d25 1625 /**
02474e43 1626 * Get rid of quotes.
1627 */
691a2d25 1628 $quotchar = substr($cidurl, 0, 1);
2dd879b8 1629 if ($quotchar == '"' || $quotchar == "'"){
1630 $cidurl = str_replace($quotchar, "", $cidurl);
1631 } else {
1632 $quotchar = '';
1633 }
691a2d25 1634 $cidurl = substr(trim($cidurl), 4);
e5e9381a 1635 $linkurl = find_ent_id($cidurl, $message);
1636 /* in case of non-save cid links $httpurl should be replaced by a sort of
02474e43 1637 unsave link image */
e5e9381a 1638 $httpurl = '';
c8f5f606 1639
1640 /**
1641 * This is part of a fix for Outlook Express 6.x generating
1642 * cid URLs without creating content-id headers. These images are
1643 * not part of the multipart/related html mail. The html contains
1644 * <img src="cid:{some_id}/image_filename.ext"> references to
1645 * attached images with as goal to render them inline although
1646 * the attachment disposition property is not inline.
1647 **/
1648
1649 if (empty($linkurl)) {
1650 if (preg_match('/{.*}\//', $cidurl)) {
1651 $cidurl = preg_replace('/{.*}\//','', $cidurl);
1652 if (!empty($cidurl)) {
1653 $linkurl = find_ent_id($cidurl, $message);
1654 }
1655 }
1656 }
f8a1ed5a 1657
c8f5f606 1658 if (!empty($linkurl)) {
6b04287c 1659 $httpurl = $quotchar . SM_PATH . 'src/download.php?absolute_dl=true&amp;' .
c8f5f606 1660 "passed_id=$id&amp;mailbox=" . urlencode($mailbox) .
1661 '&amp;ent_id=' . $linkurl . $quotchar;
1662 } else {
1663 /**
1664 * If we couldn't generate a proper img url, drop in a blank image
1665 * instead of sending back empty, otherwise it causes unusual behaviour
1666 */
59a3dab6 1667 $httpurl = $quotchar . SM_PATH . 'images/blank.png';
e5e9381a 1668 }
f8a1ed5a 1669
691a2d25 1670 return $httpurl;
1671}
1672
1673/**
02474e43 1674* This function changes the <body> tag into a <div> tag since we
1675* can't really have a body-within-body.
1676*
1677* @param $attary an array of attributes and values of <body>
1678* @param $mailbox mailbox we're currently reading (for cid2http)
1679* @param $message current message (for cid2http)
1680* @param $id current message id (for cid2http)
1681* @return a modified array of attributes to be set for <div>
1682*/
2dd879b8 1683function sq_body2div($attary, $mailbox, $message, $id){
b583c3e8 1684 $me = 'sq_body2div';
3d8371be 1685 $divattary = Array('class' => "'bodyclass'");
b583c3e8 1686 $text = '#000000';
80b4debd 1687 $has_bgc_stl = $has_txt_stl = false;
b583c3e8 1688 $styledef = '';
691a2d25 1689 if (is_array($attary) && sizeof($attary) > 0){
1690 foreach ($attary as $attname=>$attvalue){
1691 $quotchar = substr($attvalue, 0, 1);
1692 $attvalue = str_replace($quotchar, "", $attvalue);
1693 switch ($attname){
3d8371be 1694 case 'background':
da2415c1 1695 $attvalue = sq_cid2http($message, $id,
2dd879b8 1696 $attvalue, $mailbox);
3d8371be 1697 $styledef .= "background-image: url('$attvalue'); ";
1698 break;
1699 case 'bgcolor':
80b4debd 1700 $has_bgc_stl = true;
3d8371be 1701 $styledef .= "background-color: $attvalue; ";
1702 break;
1703 case 'text':
80b4debd 1704 $has_txt_stl = true;
3d8371be 1705 $styledef .= "color: $attvalue; ";
1706 break;
691a2d25 1707 }
a3daaaf3 1708 }
80b4debd 1709 // Outlook defines a white bgcolor and no text color. This can lead to
1710 // white text on a white bg with certain themes.
1711 if ($has_bgc_stl && !$has_txt_stl) {
1712 $styledef .= "color: $text; ";
1713 }
691a2d25 1714 if (strlen($styledef) > 0){
1715 $divattary{"style"} = "\"$styledef\"";
1716 }
1717 }
1718 return $divattary;
1719}
a3daaaf3 1720
691a2d25 1721/**
02474e43 1722* This is the main function and the one you should actually be calling.
1723* There are several variables you should be aware of an which need
1724* special description.
1725*
1726* Since the description is quite lengthy, see it here:
1727* http://linux.duke.edu/projects/mini/htmlfilter/
1728*
1729* @param $body the string with HTML you wish to filter
1730* @param $tag_list see description above
1731* @param $rm_tags_with_content see description above
1732* @param $self_closing_tags see description above
1733* @param $force_tag_closing see description above
1734* @param $rm_attnames see description above
1735* @param $bad_attvals see description above
1736* @param $add_attr_to_tag see description above
1737* @param $message message object
1738* @param $id message id
1739* @return sanitized html safe to show on your pages.
1740*/
da2415c1 1741function sq_sanitize($body,
02474e43 1742 $tag_list,
1743 $rm_tags_with_content,
1744 $self_closing_tags,
1745 $force_tag_closing,
1746 $rm_attnames,
1747 $bad_attvals,
1748 $add_attr_to_tag,
1749 $message,
1750 $id,
1751 $mailbox
1752 ){
b583c3e8 1753 $me = 'sq_sanitize';
7d06541f 1754 $rm_tags = array_shift($tag_list);
691a2d25 1755 /**
02474e43 1756 * Normalize rm_tags and rm_tags_with_content.
1757 */
7d06541f 1758 @array_walk($tag_list, 'sq_casenormalize');
691a2d25 1759 @array_walk($rm_tags_with_content, 'sq_casenormalize');
1760 @array_walk($self_closing_tags, 'sq_casenormalize');
1761 /**
02474e43 1762 * See if tag_list is of tags to remove or tags to allow.
1763 * false means remove these tags
1764 * true means allow these tags
1765 */
691a2d25 1766 $curpos = 0;
1767 $open_tags = Array();
2dd879b8 1768 $trusted = "\n<!-- begin sanitized html -->\n";
691a2d25 1769 $skip_content = false;
bb8d0799 1770 /**
02474e43 1771 * Take care of netscape's stupid javascript entities like
1772 * &{alert('boo')};
1773 */
bb8d0799 1774 $body = preg_replace("/&(\{.*?\};)/si", "&amp;\\1", $body);
691a2d25 1775
7d06541f 1776 while (($curtag = sq_getnxtag($body, $curpos)) != FALSE){
691a2d25 1777 list($tagname, $attary, $tagtype, $lt, $gt) = $curtag;
1778 $free_content = substr($body, $curpos, $lt-$curpos);
1779 /**
02474e43 1780 * Take care of <style>
1781 */
7d06541f 1782 if ($tagname == "style" && $tagtype == 1){
da2415c1 1783 list($free_content, $curpos) =
e60a299a 1784 sq_fixstyle($body, $gt+1, $message, $id, $mailbox);
7d06541f 1785 if ($free_content != FALSE){
1786 $trusted .= sq_tagprint($tagname, $attary, $tagtype);
1787 $trusted .= $free_content;
1788 $trusted .= sq_tagprint($tagname, false, 2);
1789 }
1790 continue;
691a2d25 1791 }
1792 if ($skip_content == false){
1793 $trusted .= $free_content;
691a2d25 1794 }
1795 if ($tagname != FALSE){
1796 if ($tagtype == 2){
1797 if ($skip_content == $tagname){
1798 /**
02474e43 1799 * Got to the end of tag we needed to remove.
1800 */
691a2d25 1801 $tagname = false;
1802 $skip_content = false;
1803 } else {
1804 if ($skip_content == false){
c828931c 1805 if ($tagname == "body"){
1806 $tagname = "div";
2dd879b8 1807 }
da2415c1 1808 if (isset($open_tags{$tagname}) &&
2dd879b8 1809 $open_tags{$tagname} > 0){
1810 $open_tags{$tagname}--;
691a2d25 1811 } else {
2dd879b8 1812 $tagname = false;
691a2d25 1813 }
691a2d25 1814 }
1815 }
1816 } else {
1817 /**
02474e43 1818 * $rm_tags_with_content
1819 */
691a2d25 1820 if ($skip_content == false){
1821 /**
02474e43 1822 * See if this is a self-closing type and change
1823 * tagtype appropriately.
1824 */
691a2d25 1825 if ($tagtype == 1
1826 && in_array($tagname, $self_closing_tags)){
2dd879b8 1827 $tagtype = 3;
691a2d25 1828 }
1829 /**
02474e43 1830 * See if we should skip this tag and any content
1831 * inside it.
1832 */
691a2d25 1833 if ($tagtype == 1 &&
1834 in_array($tagname, $rm_tags_with_content)){
1835 $skip_content = $tagname;
1836 } else {
da2415c1 1837 if (($rm_tags == false
02474e43 1838 && in_array($tagname, $tag_list)) ||
691a2d25 1839 ($rm_tags == true &&
02474e43 1840 !in_array($tagname, $tag_list))){
691a2d25 1841 $tagname = false;
1842 } else {
2dd879b8 1843 /**
02474e43 1844 * Convert body into div.
1845 */
2dd879b8 1846 if ($tagname == "body"){
1847 $tagname = "div";
da2415c1 1848 $attary = sq_body2div($attary, $mailbox,
02474e43 1849 $message, $id);
2dd879b8 1850 }
691a2d25 1851 if ($tagtype == 1){
1852 if (isset($open_tags{$tagname})){
1853 $open_tags{$tagname}++;
1854 } else {
1855 $open_tags{$tagname}=1;
1856 }
1857 }
1858 /**
02474e43 1859 * This is where we run other checks.
1860 */
691a2d25 1861 if (is_array($attary) && sizeof($attary) > 0){
1862 $attary = sq_fixatts($tagname,
02474e43 1863 $attary,
1864 $rm_attnames,
1865 $bad_attvals,
1866 $add_attr_to_tag,
1867 $message,
1868 $id,
1869 $mailbox
1870 );
691a2d25 1871 }
1872 }
1873 }
691a2d25 1874 }
1875 }
1876 if ($tagname != false && $skip_content == false){
1877 $trusted .= sq_tagprint($tagname, $attary, $tagtype);
1878 }
691a2d25 1879 }
1880 $curpos = $gt+1;
a3daaaf3 1881 }
691a2d25 1882 $trusted .= substr($body, $curpos, strlen($body)-$curpos);
1883 if ($force_tag_closing == true){
1884 foreach ($open_tags as $tagname=>$opentimes){
1885 while ($opentimes > 0){
1886 $trusted .= '</' . $tagname . '>';
1887 $opentimes--;
1888 }
1889 }
1890 $trusted .= "\n";
1891 }
1892 $trusted .= "<!-- end sanitized html -->\n";
1893 return $trusted;
1894}
451f74a2 1895
691a2d25 1896/**
02474e43 1897* This is a wrapper function to call html sanitizing routines.
1898*
1899* @param $body the body of the message
1900* @param $id the id of the message
1814c39b 1901* @param $message
1902* @param $mailbox
1903* @param boolean $take_mailto_links When TRUE, converts mailto: links
1904* into internal SM compose links
1905* (optional; default = TRUE)
02474e43 1906* @return a string with html safe to display in the browser.
1907*/
1814c39b 1908function magicHTML($body, $id, $message, $mailbox = 'INBOX', $take_mailto_links = true) {
376667f7 1909
1910 require_once(SM_PATH . 'functions/url_parser.php'); // for $MailTo_PReg_Match
1911
691a2d25 1912 global $attachment_common_show_images, $view_unsafe_images,
02474e43 1913 $has_unsafe_images;
376667f7 1914
691a2d25 1915 /**
02474e43 1916 * Don't display attached images in HTML mode.
1917 */
691a2d25 1918 $attachment_common_show_images = false;
1919 $tag_list = Array(
02474e43 1920 false,
1921 "object",
1922 "meta",
1923 "html",
1924 "head",
1925 "base",
1926 "link",
1927 "frame",
1928 "iframe",
1929 "plaintext",
1930 "marquee"
1931 );
691a2d25 1932
1933 $rm_tags_with_content = Array(
02474e43 1934 "script",
1935 "applet",
1936 "embed",
1937 "title",
1938 "frameset",
1939 "xml"
1940 );
691a2d25 1941
1942 $self_closing_tags = Array(
1943 "img",
1944 "br",
1945 "hr",
ff940ebc 1946 "input",
1947 "outbind"
691a2d25 1948 );
1949
2dd879b8 1950 $force_tag_closing = true;
691a2d25 1951
1952 $rm_attnames = Array(
02474e43 1953 "/.*/" =>
1954 Array(
1955 "/target/i",
1956 "/^on.*/i",
1957 "/^dynsrc/i",
1958 "/^data.*/i",
1959 "/^lowsrc.*/i"
1960 )
1961 );
691a2d25 1962
1963 $secremoveimg = "../images/" . _("sec_remove_eng.png");
1964 $bad_attvals = Array(
1965 "/.*/" =>
1966 Array(
0a6ec9b5 1967 "/^src|background/i" =>
691a2d25 1968 Array(
02474e43 1969 Array(
f83c60a2 1970 "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si",
1971 "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si",
1972 "/^([\'\"])\s*about\s*:.*([\'\"])/si"
691a2d25 1973 ),
02474e43 1974 Array(
691a2d25 1975 "\\1$secremoveimg\\2",
bb8d0799 1976 "\\1$secremoveimg\\2",
3d8371be 1977 "\\1$secremoveimg\\2",
1978 "\\1$secremoveimg\\2"
691a2d25 1979 )
1980 ),
0a6ec9b5 1981 "/^href|action/i" =>
1982 Array(
02474e43 1983 Array(
f83c60a2 1984 "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si",
1985 "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si",
1986 "/^([\'\"])\s*about\s*:.*([\'\"])/si"
0a6ec9b5 1987 ),
02474e43 1988 Array(
2dd879b8 1989 "\\1#\\1",
1990 "\\1#\\1",
1991 "\\1#\\1",
1992 "\\1#\\1"
0a6ec9b5 1993 )
1994 ),
f83c60a2 1995 "/^style/i" =>
691a2d25 1996 Array(
02474e43 1997 Array(
f83c60a2 1998 "/expression/i",
1999 "/binding/i",
2000 "/behaviou*r/i",
2dd879b8 2001 "/include-source/i",
4eacb6ed 2002 "/position\s*:\s*absolute/i",
7d06541f 2003 "/url\s*\(\s*([\'\"])\s*\S+script\s*:.*([\'\"])\s*\)/si",
2004 "/url\s*\(\s*([\'\"])\s*mocha\s*:.*([\'\"])\s*\)/si",
af861a34 2005 "/url\s*\(\s*([\'\"])\s*about\s*:.*([\'\"])\s*\)/si",
2006 "/(.*)\s*:\s*url\s*\(\s*([\'\"]*)\s*\S+script\s*:.*([\'\"]*)\s*\)/si"
02474e43 2007 ),
2008 Array(
bb8d0799 2009 "idiocy",
3d8371be 2010 "idiocy",
2011 "idiocy",
2dd879b8 2012 "idiocy",
4eacb6ed 2013 "",
2dd879b8 2014 "url(\\1#\\1)",
2015 "url(\\1#\\1)",
2016 "url(\\1#\\1)",
af861a34 2017 "url(\\1#\\1)",
2018 "\\1:url(\\2#\\3)"
02474e43 2019 )
2020 )
691a2d25 2021 )
2022 );
5262d9a6 2023 if( !sqgetGlobalVar('view_unsafe_images', $view_unsafe_images, SQ_GET) ) {
2dd879b8 2024 $view_unsafe_images = false;
45071bd6 2025 }
691a2d25 2026 if (!$view_unsafe_images){
2027 /**
02474e43 2028 * Remove any references to http/https if view_unsafe_images set
2029 * to false.
2030 */
2031 array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[0],
f83c60a2 2032 '/^([\'\"])\s*https*:.*([\'\"])/si');
02474e43 2033 array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[1],
2dd879b8 2034 "\\1$secremoveimg\\1");
02474e43 2035 array_push($bad_attvals{'/.*/'}{'/^style/i'}[0],
43d678b6 2036 '/url\(([\'\"])\s*https*:.*([\'\"])\)/si');
02474e43 2037 array_push($bad_attvals{'/.*/'}{'/^style/i'}[1],
2dd879b8 2038 "url(\\1$secremoveimg\\1)");
691a2d25 2039 }
451f74a2 2040
691a2d25 2041 $add_attr_to_tag = Array(
da2415c1 2042 "/^a$/i" =>
c25f2fbb 2043 Array('target'=>'"_blank"',
02474e43 2044 'title'=>'"'._("This external link will open in a new window").'"'
2dd879b8 2045 )
2046 );
da2415c1 2047 $trusted = sq_sanitize($body,
02474e43 2048 $tag_list,
2049 $rm_tags_with_content,
2050 $self_closing_tags,
2051 $force_tag_closing,
2052 $rm_attnames,
2053 $bad_attvals,
2054 $add_attr_to_tag,
2055 $message,
2056 $id,
2057 $mailbox
2058 );
f83c60a2 2059 if (preg_match("|$secremoveimg|i", $trusted)){
691a2d25 2060 $has_unsafe_images = true;
da2415c1 2061 }
ebeb8348 2062
2063
376667f7 2064 // we want to parse mailto's in HTML output, change to SM compose links
2065 // this is a modified version of code from url_parser.php... but Marc is
2066 // right: we need a better filtering implementation; adding this randomly
2067 // here is not a great solution
2068 //
1814c39b 2069 if ($take_mailto_links) {
2070 // parseUrl($trusted); // this even parses URLs inside of tags... too aggressive
2071 global $MailTo_PReg_Match;
2072 $MailTo_PReg_Match = '/mailto:' . substr($MailTo_PReg_Match, 1);
2073 if ((preg_match_all($MailTo_PReg_Match, $trusted, $regs)) && ($regs[0][0] != '')) {
2074 foreach ($regs[0] as $i => $mailto_before) {
2075 $mailto_params = $regs[10][$i];
f8a1ed5a 2076
1814c39b 2077 // get rid of any tailing quote since we have to add send_to to the end
2078 //
2079 if (substr($mailto_before, strlen($mailto_before) - 1) == '"')
2080 $mailto_before = substr($mailto_before, 0, strlen($mailto_before) - 1);
2081 if (substr($mailto_params, strlen($mailto_params) - 1) == '"')
2082 $mailto_params = substr($mailto_params, 0, strlen($mailto_params) - 1);
f8a1ed5a 2083
1814c39b 2084 if ($regs[1][$i]) { //if there is an email addr before '?', we need to merge it with the params
2085 $to = 'to=' . $regs[1][$i];
2086 if (strpos($mailto_params, 'to=') > -1) //already a 'to='
2087 $mailto_params = str_replace('to=', $to . '%2C%20', $mailto_params);
2088 else {
2089 if ($mailto_params) //already some params, append to them
2090 $mailto_params .= '&amp;' . $to;
2091 else
2092 $mailto_params .= '?' . $to;
2093 }
376667f7 2094 }
f8a1ed5a 2095
1814c39b 2096 $url_str = preg_replace(array('/to=/i', '/(?<!b)cc=/i', '/bcc=/i'), array('send_to=', 'send_to_cc=', 'send_to_bcc='), $mailto_params);
f8a1ed5a 2097
1814c39b 2098 // we'll already have target=_blank, no need to allow comp_in_new
2099 // here (which would be a lot more work anyway)
2100 //
2101 global $compose_new_win;
2102 $temp_comp_in_new = $compose_new_win;
2103 $compose_new_win = 0;
2104 $comp_uri = makeComposeLink('src/compose.php' . $url_str, $mailto_before);
2105 $compose_new_win = $temp_comp_in_new;
f8a1ed5a 2106
1814c39b 2107 // remove <a href=" and anything after the next quote (we only
2108 // need the uri, not the link HTML) in compose uri
2109 //
2110 $comp_uri = substr($comp_uri, 9);
2111 $comp_uri = substr($comp_uri, 0, strpos($comp_uri, '"', 1));
2112 $trusted = str_replace($mailto_before, $comp_uri, $trusted);
376667f7 2113 }
376667f7 2114 }
2115 }
ebeb8348 2116
691a2d25 2117 return $trusted;
451f74a2 2118}
a4a70693 2119
da2415c1 2120/**
02474e43 2121* function SendDownloadHeaders - send file to the browser
2122*
2123* Original Source: SM core src/download.php
2124* moved here to make it available to other code, and separate
2125* front end from back end functionality.
2126*
2127* @param string $type0 first half of mime type
2128* @param string $type1 second half of mime type
2129* @param string $filename filename to tell the browser for downloaded file
2130* @param boolean $force whether to force the download dialog to pop
2131* @param optional integer $filesize send the Content-Header and length to the browser
2132* @return void
2133*/
2134function SendDownloadHeaders($type0, $type1, $filename, $force, $filesize=0) {
2135 global $languages, $squirrelmail_language;
2136 $isIE = $isIE6 = 0;
2137
2138 sqgetGlobalVar('HTTP_USER_AGENT', $HTTP_USER_AGENT, SQ_SERVER);
2139
2140 if (strstr($HTTP_USER_AGENT, 'compatible; MSIE ') !== false &&
2141 strstr($HTTP_USER_AGENT, 'Opera') === false) {
2142 $isIE = 1;
2143 }
2144
2145 if (strstr($HTTP_USER_AGENT, 'compatible; MSIE 6') !== false &&
2146 strstr($HTTP_USER_AGENT, 'Opera') === false) {
2147 $isIE6 = 1;
2148 }
2149
2150 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
2151 function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_downloadfilename')) {
2152 $filename =
2153 call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_downloadfilename', $filename, $HTTP_USER_AGENT);
2154 } else {
2155 $filename = ereg_replace('[\\/:\*\?"<>\|;]', '_', str_replace('&nbsp;', ' ', $filename));
2156 }
2157
2158 // A Pox on Microsoft and it's Internet Explorer!
2159 //
2160 // IE has lots of bugs with file downloads.
2161 // It also has problems with SSL. Both of these cause problems
2162 // for us in this function.
2163 //
2164 // See this article on Cache Control headers and SSL
2165 // http://support.microsoft.com/default.aspx?scid=kb;en-us;323308
2166 //
2167 // The best thing you can do for IE is to upgrade to the latest
2168 // version
2169 //set all the Cache Control Headers for IE
2170 if ($isIE) {
2171 $filename=rawurlencode($filename);
2172 header ("Pragma: public");
2173 header ("Cache-Control: no-store, max-age=0, no-cache, must-revalidate"); # HTTP/1.1
2174 header ("Cache-Control: post-check=0, pre-check=0", false);
2175 header ("Cache-control: private");
2176
2177 //set the inline header for IE, we'll add the attachment header later if we need it
2178 header ("Content-Disposition: inline; filename=$filename");
2179 }
2180
2181 if (!$force) {
2182 // Try to show in browser window
2183 header ("Content-Disposition: inline; filename=\"$filename\"");
2184 header ("Content-Type: $type0/$type1; name=\"$filename\"");
2185 } else {
2186 // Try to pop up the "save as" box
2187
2188 // IE makes this hard. It pops up 2 save boxes, or none.
2189 // http://support.microsoft.com/support/kb/articles/Q238/5/88.ASP
2190 // http://support.microsoft.com/default.aspx?scid=kb;EN-US;260519
2191 // But, according to Microsoft, it is "RFC compliant but doesn't
2192 // take into account some deviations that allowed within the
2193 // specification." Doesn't that mean RFC non-compliant?
2194 // http://support.microsoft.com/support/kb/articles/Q258/4/52.ASP
2195
2196 // all browsers need the application/octet-stream header for this
2197 header ("Content-Type: application/octet-stream; name=\"$filename\"");
2198
2199 // http://support.microsoft.com/support/kb/articles/Q182/3/15.asp
2200 // Do not have quotes around filename, but that applied to
2201 // "attachment"... does it apply to inline too?
2202 header ("Content-Disposition: attachment; filename=\"$filename\"");
2203
2204 if ($isIE && !$isIE6) {
2205 // This combination seems to work mostly. IE 5.5 SP 1 has
2206 // known issues (see the Microsoft Knowledge Base)
2207
2208 // This works for most types, but doesn't work with Word files
2209 header ("Content-Type: application/download; name=\"$filename\"");
2210
2211 // These are spares, just in case. :-)
2212 //header("Content-Type: $type0/$type1; name=\"$filename\"");
2213 //header("Content-Type: application/x-msdownload; name=\"$filename\"");
2214 //header("Content-Type: application/octet-stream; name=\"$filename\"");
2215 } else {
2216 // another application/octet-stream forces download for Netscape
2217 header ("Content-Type: application/octet-stream; name=\"$filename\"");
2218 }
2219 }
2220
2221 //send the content-length header if the calling function provides it
2222 if ($filesize > 0) {
2223 header("Content-Length: $filesize");
2224 }
07c49f57 2225
8d863f64 2226} // end fn SendDownloadHeaders
da2415c1 2227
da1b55ad 2228?>