59177427 |
1 | <?php |
2ba13803 |
2 | |
35586184 |
3 | /** |
8bd0068d |
4 | * mime.php |
5 | * |
8bd0068d |
6 | * This contains the functions necessary to detect and decode MIME |
7 | * messages. |
8 | * |
4b5049de |
9 | * @copyright © 1999-2007 The SquirrelMail Project Team |
4b4abf93 |
10 | * @license http://opensource.org/licenses/gpl-license.php GNU Public License |
8bd0068d |
11 | * @version $Id$ |
12 | * @package squirrelmail |
13 | */ |
b74ba498 |
14 | |
202bcbcc |
15 | /** |
16 | * dependency information |
17 | functions dependency |
18 | mime_structure |
19 | class/mime/Message.class.php |
20 | Message::parseStructure |
21 | functions/page_header.php |
22 | displayPageHeader |
23 | functions/display_messages.php |
24 | plain_error_message |
25 | mime_fetch_body |
26 | functions/imap_general.php |
27 | sqimap_run_command |
28 | mime_print_body_lines |
29 | |
30 | |
31 | |
32 | functions/imap.php |
33 | functions/attachment_common.php |
34 | functions/display_messages.php |
35 | |
36 | magicHtml => url_parser |
37 | translateText => url_parser |
38 | |
39 | */ |
40 | |
8beafbbc |
41 | |
7c7b74b3 |
42 | /* -------------------------------------------------------------------------- */ |
43 | /* MIME DECODING */ |
44 | /* -------------------------------------------------------------------------- */ |
b74ba498 |
45 | |
d6c32258 |
46 | /** |
8bd0068d |
47 | * Get the MIME structure |
48 | * |
49 | * This function gets the structure of a message and stores it in the "message" class. |
50 | * It will return this object for use with all relevant header information and |
51 | * fully parsed into the standard "message" object format. |
52 | */ |
a4a70693 |
53 | function mime_structure ($bodystructure, $flags=array()) { |
c9d78ab4 |
54 | |
3d8371be |
55 | /* Isolate the body structure and remove beginning and end parenthesis. */ |
a4a70693 |
56 | $read = trim(substr ($bodystructure, strpos(strtolower($bodystructure), 'bodystructure') + 13)); |
451f74a2 |
57 | $read = trim(substr ($read, 0, -1)); |
22efa9fb |
58 | $i = 0; |
59 | $msg = Message::parseStructure($read,$i); |
2b665f28 |
60 | |
9de42168 |
61 | if (!is_object($msg)) { |
3d8371be |
62 | global $color, $mailbox; |
a48eba8f |
63 | displayPageHeader( $color, $mailbox ); |
5e8de8b6 |
64 | $errormessage = _("SquirrelMail could not decode the bodystructure of the message"); |
8bd0068d |
65 | $errormessage .= '<br />'._("The bodystructure provided by your IMAP server:").'<br /><br />'; |
472e7acb |
66 | $errormessage .= '<pre>' . htmlspecialchars($read) . '</pre>'; |
ce8c6f42 |
67 | plain_error_message( $errormessage ); |
3d8371be |
68 | echo '</body></html>'; |
9de42168 |
69 | exit; |
70 | } |
a4a70693 |
71 | if (count($flags)) { |
7a9e9c89 |
72 | foreach ($flags as $flag) { |
e1115979 |
73 | //FIXME: please document why it is we have to check the first char of the flag but we then go ahead and do a full string comparison anyway. Is this a speed enhancement? If not, let's keep it simple and just compare the full string and forget the switch block. |
7a9e9c89 |
74 | $char = strtoupper($flag{1}); |
75 | switch ($char) { |
3d8371be |
76 | case 'S': |
77 | if (strtolower($flag) == '\\seen') { |
78 | $msg->is_seen = true; |
79 | } |
80 | break; |
81 | case 'A': |
82 | if (strtolower($flag) == '\\answered') { |
83 | $msg->is_answered = true; |
84 | } |
85 | break; |
86 | case 'D': |
87 | if (strtolower($flag) == '\\deleted') { |
88 | $msg->is_deleted = true; |
89 | } |
90 | break; |
91 | case 'F': |
92 | if (strtolower($flag) == '\\flagged') { |
93 | $msg->is_flagged = true; |
94 | } |
95 | break; |
96 | case 'M': |
97 | if (strtolower($flag) == '$mdnsent') { |
98 | $msg->is_mdnsent = true; |
99 | } |
100 | break; |
101 | default: |
102 | break; |
7a9e9c89 |
103 | } |
104 | } |
451f74a2 |
105 | } |
7a9e9c89 |
106 | // listEntities($msg); |
3d8371be |
107 | return $msg; |
451f74a2 |
108 | } |
b74ba498 |
109 | |
22efa9fb |
110 | |
111 | |
3d8371be |
112 | /* This starts the parsing of a particular structure. It is called recursively, |
8bd0068d |
113 | * so it can be passed different structures. It returns an object of type |
114 | * $message. |
115 | * First, it checks to see if it is a multipart message. If it is, then it |
116 | * handles that as it sees is necessary. If it is just a regular entity, |
117 | * then it parses it and adds the necessary header information (by calling out |
118 | * to mime_get_elements() |
119 | */ |
451f74a2 |
120 | |
4d592352 |
121 | function mime_fetch_body($imap_stream, $id, $ent_id=1, $fetch_size=0) { |
3d8371be |
122 | /* Do a bit of error correction. If we couldn't find the entity id, just guess |
8bd0068d |
123 | * that it is the first one. That is usually the case anyway. |
124 | */ |
7c7b74b3 |
125 | |
09a4bde3 |
126 | if (!$ent_id) { |
08b7f7cc |
127 | $cmd = "FETCH $id BODY[]"; |
1035e159 |
128 | } else { |
08b7f7cc |
129 | $cmd = "FETCH $id BODY[$ent_id]"; |
09a4bde3 |
130 | } |
3d8371be |
131 | |
4d592352 |
132 | if ($fetch_size!=0) $cmd .= "<0.$fetch_size>"; |
da2415c1 |
133 | |
6201339c |
134 | $data = sqimap_run_command ($imap_stream, $cmd, true, $response, $message, TRUE); |
77b88425 |
135 | do { |
3d8371be |
136 | $topline = trim(array_shift($data)); |
137 | } while($topline && ($topline[0] == '*') && !preg_match('/\* [0-9]+ FETCH.*/i', $topline)) ; |
a4a70693 |
138 | |
451f74a2 |
139 | $wholemessage = implode('', $data); |
140 | if (ereg('\\{([^\\}]*)\\}', $topline, $regs)) { |
3d8371be |
141 | $ret = substr($wholemessage, 0, $regs[1]); |
142 | /* There is some information in the content info header that could be important |
8bd0068d |
143 | * in order to parse html messages. Let's get them here. |
144 | */ |
0600bdf1 |
145 | // if ($ret{0} == '<') { |
6201339c |
146 | // $data = sqimap_run_command ($imap_stream, "FETCH $id BODY[$ent_id.MIME]", true, $response, $message, TRUE); |
0600bdf1 |
147 | // } |
451f74a2 |
148 | } else if (ereg('"([^"]*)"', $topline, $regs)) { |
149 | $ret = $regs[1]; |
06bcb9c3 |
150 | } else if ((stristr($topline, 'nil') !== false) && (empty($wholemessage))) { |
151 | $ret = $wholemessage; |
451f74a2 |
152 | } else { |
153 | global $where, $what, $mailbox, $passed_id, $startMessage; |
3d8371be |
154 | $par = 'mailbox=' . urlencode($mailbox) . '&passed_id=' . $passed_id; |
451f74a2 |
155 | if (isset($where) && isset($what)) { |
3d8371be |
156 | $par .= '&where=' . urlencode($where) . '&what=' . urlencode($what); |
a3daaaf3 |
157 | } else { |
3d8371be |
158 | $par .= '&startMessage=' . $startMessage . '&show_more=0'; |
451f74a2 |
159 | } |
e5ea9327 |
160 | $par .= '&response=' . urlencode($response) . |
8bd0068d |
161 | '&message=' . urlencode($message) . |
162 | '&topline=' . urlencode($topline); |
a019eeb8 |
163 | |
8bd0068d |
164 | echo '<tt><br />' . |
02474e43 |
165 | '<table width="80%"><tr>' . |
166 | '<tr><td colspan="2">' . |
167 | _("Body retrieval error. The reason for this is most probably that the message is malformed.") . |
168 | '</td></tr>' . |
169 | '<tr><td><b>' . _("Command:") . "</td><td>$cmd</td></tr>" . |
170 | '<tr><td><b>' . _("Response:") . "</td><td>$response</td></tr>" . |
171 | '<tr><td><b>' . _("Message:") . "</td><td>$message</td></tr>" . |
172 | '<tr><td><b>' . _("FETCH line:") . "</td><td>$topline</td></tr>" . |
173 | "</table><br /></tt></font><hr />"; |
346817d4 |
174 | |
6201339c |
175 | $data = sqimap_run_command ($imap_stream, "FETCH $passed_id BODY[]", true, $response, $message, TRUE); |
451f74a2 |
176 | array_shift($data); |
177 | $wholemessage = implode('', $data); |
a019eeb8 |
178 | |
346817d4 |
179 | $ret = $wholemessage; |
a3daaaf3 |
180 | } |
3d8371be |
181 | return $ret; |
451f74a2 |
182 | } |
d4467150 |
183 | |
fa26ab45 |
184 | function mime_print_body_lines ($imap_stream, $id, $ent_id=1, $encoding, $rStream='php://stdout', $force_crlf='') { |
1035e159 |
185 | |
3d8371be |
186 | /* Don't kill the connection if the browser is over a dialup |
8bd0068d |
187 | * and it would take over 30 seconds to download it. |
188 | * Don't call set_time_limit in safe mode. |
189 | */ |
b7206e1d |
190 | |
3d8371be |
191 | if (!ini_get('safe_mode')) { |
b7206e1d |
192 | set_time_limit(0); |
193 | } |
7c7b74b3 |
194 | /* in case of base64 encoded attachments, do not buffer them. |
8bd0068d |
195 | Instead, echo the decoded attachment directly to screen */ |
7c7b74b3 |
196 | if (strtolower($encoding) == 'base64') { |
197 | if (!$ent_id) { |
7591f143 |
198 | $query = "FETCH $id BODY[]"; |
7c7b74b3 |
199 | } else { |
7591f143 |
200 | $query = "FETCH $id BODY[$ent_id]"; |
7c7b74b3 |
201 | } |
7591f143 |
202 | sqimap_run_command($imap_stream,$query,true,$response,$message,TRUE,'sqimap_base64_decode',$rStream,true); |
1d142b8d |
203 | } else { |
7591f143 |
204 | $body = mime_fetch_body ($imap_stream, $id, $ent_id); |
205 | if (is_resource($rStream)) { |
fa26ab45 |
206 | fputs($rStream,decodeBody($body, $encoding, $force_crlf)); |
7591f143 |
207 | } else { |
fa26ab45 |
208 | echo decodeBody($body, $encoding, $force_crlf); |
7591f143 |
209 | } |
1d142b8d |
210 | } |
346817d4 |
211 | |
da2415c1 |
212 | /* |
8bd0068d |
213 | TODO, use the same method for quoted printable. |
214 | However, I assume that quoted printable attachments aren't that large |
215 | so the performancegain / memory usage drop will be minimal. |
216 | If we decide to add that then we need to adapt sqimap_fread because |
217 | we need to split te result on \n and fread doesn't stop at \n. That |
218 | means we also should provide $results from sqimap_fread (by ref) to |
219 | te function and set $no_return to false. The $filter function for |
220 | quoted printable should handle unsetting of $results. |
221 | */ |
da2415c1 |
222 | /* |
8bd0068d |
223 | TODO 2: find out how we write to the output stream php://stdout. fwrite |
224 | doesn't work because 'php://stdout isn't a stream. |
225 | */ |
7c7b74b3 |
226 | |
5d9c6f73 |
227 | return; |
451f74a2 |
228 | } |
beb9e459 |
229 | |
451f74a2 |
230 | /* -[ END MIME DECODING ]----------------------------------------------------------- */ |
d4467150 |
231 | |
3d8371be |
232 | /* This is here for debugging purposes. It will print out a list |
8bd0068d |
233 | * of all the entity IDs that are in the $message object. |
234 | */ |
451f74a2 |
235 | function listEntities ($message) { |
3d8371be |
236 | if ($message) { |
3c621ba1 |
237 | echo "<tt>" . $message->entity_id . ' : ' . $message->type0 . '/' . $message->type1 . ' parent = '. $message->parent->entity_id. '<br />'; |
3d8371be |
238 | for ($i = 0; isset($message->entities[$i]); $i++) { |
239 | echo "$i : "; |
240 | $msg = listEntities($message->entities[$i]); |
241 | |
242 | if ($msg) { |
243 | echo "return: "; |
244 | return $msg; |
245 | } |
246 | } |
a4a70693 |
247 | } |
451f74a2 |
248 | } |
f0c4dc12 |
249 | |
f792c641 |
250 | function getPriorityStr($priority) { |
3d8371be |
251 | $priority_level = substr($priority,0,1); |
252 | |
253 | switch($priority_level) { |
254 | /* Check for a higher then normal priority. */ |
255 | case '1': |
256 | case '2': |
257 | $priority_string = _("High"); |
258 | break; |
259 | |
260 | /* Check for a lower then normal priority. */ |
261 | case '4': |
262 | case '5': |
263 | $priority_string = _("Low"); |
264 | break; |
265 | |
266 | /* Check for a normal priority. */ |
267 | case '3': |
268 | default: |
269 | $priority_level = '3'; |
270 | $priority_string = _("Normal"); |
271 | break; |
272 | |
273 | } |
274 | return $priority_string; |
f792c641 |
275 | } |
276 | |
451f74a2 |
277 | /* returns a $message object for a particular entity id */ |
278 | function getEntity ($message, $ent_id) { |
a4a70693 |
279 | return $message->getEntity($ent_id); |
451f74a2 |
280 | } |
8beafbbc |
281 | |
3d8371be |
282 | /* translateText |
8bd0068d |
283 | * Extracted from strings.php 23/03/2002 |
284 | */ |
da4c66e8 |
285 | |
286 | function translateText(&$body, $wrap_at, $charset) { |
3d8371be |
287 | global $where, $what; /* from searching */ |
288 | global $color; /* color theme */ |
da4c66e8 |
289 | |
202bcbcc |
290 | // require_once(SM_PATH . 'functions/url_parser.php'); |
da4c66e8 |
291 | |
292 | $body_ary = explode("\n", $body); |
da4c66e8 |
293 | for ($i=0; $i < count($body_ary); $i++) { |
4c1f4be3 |
294 | $line = rtrim($body_ary[$i],"\r"); |
295 | |
da4c66e8 |
296 | if (strlen($line) - 2 >= $wrap_at) { |
c7aff938 |
297 | sqWordWrap($line, $wrap_at, $charset); |
da4c66e8 |
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, '>', $pos) === $pos) { |
312 | $pos += 4; |
3d8371be |
313 | $quotes++; |
da4c66e8 |
314 | } else { |
315 | break; |
316 | } |
317 | } |
3d8371be |
318 | |
83c94382 |
319 | if ($quotes % 2) { |
d0814c02 |
320 | $line = '<span class="quote1">' . $line . '</span>'; |
4c25967c |
321 | } elseif ($quotes) { |
d0814c02 |
322 | $line = '<span class="quote2">' . $line . '</span>'; |
da4c66e8 |
323 | } |
3d8371be |
324 | |
da4c66e8 |
325 | $body_ary[$i] = $line; |
326 | } |
327 | $body = '<pre>' . implode("\n", $body_ary) . '</pre>'; |
328 | } |
329 | |
a2bfcbce |
330 | /** |
da1b55ad |
331 | * This returns a parsed string called $body. That string can then |
332 | * be displayed as the actual message in the HTML. It contains |
333 | * everything needed, including HTML Tags, Attachments at the |
334 | * bottom, etc. |
f8a1ed5a |
335 | * |
da1b55ad |
336 | * Since 1.2.0 function uses message_body hook. |
337 | * Till 1.3.0 function included output of formatAttachments(). |
338 | * |
339 | * @param resource $imap_stream imap connection resource |
340 | * @param object $message squirrelmail message object |
341 | * @param array $color squirrelmail color theme array |
342 | * @param integer $wrap_at number of characters per line |
343 | * @param string $ent_num (since 1.3.0) message part id |
344 | * @param integer $id (since 1.3.0) message id |
345 | * @param string $mailbox (since 1.3.0) imap folder name |
da1b55ad |
346 | * @return string html formated message text |
347 | */ |
a540f994 |
348 | function formatBody($imap_stream, $message, $color, $wrap_at, $ent_num, $id, $mailbox='INBOX') { |
3d8371be |
349 | /* This if statement checks for the entity to show as the |
8bd0068d |
350 | * primary message. To add more of them, just put them in the |
351 | * order that is their priority. |
352 | */ |
ce68b76b |
353 | global $startMessage, $languages, $squirrelmail_language, |
40a34e57 |
354 | $show_html_default, $sort, $has_unsafe_images, $passed_ent_id, |
14c85e39 |
355 | $use_iframe, $iframe_height, $download_and_unsafe_link, |
955bfc8f |
356 | $download_href, $unsafe_image_toggle_href, $unsafe_image_toggle_text, |
551c7b53 |
357 | $oTemplate, $nbsp; |
2c25d36a |
358 | |
359 | // workaround for not updated config.php |
360 | if (! isset($use_iframe)) $use_iframe = false; |
77bfbd2e |
361 | |
d31f73f1 |
362 | // If there's no "view_unsafe_images" variable in the URL, turn unsafe |
363 | // images off by default. |
afbf184c |
364 | sqgetGlobalVar('view_unsafe_images', $view_unsafe_images, SQ_GET, FALSE); |
d03c24f4 |
365 | |
cc34b00d |
366 | $body = ''; |
23bcec6f |
367 | $urlmailbox = urlencode($mailbox); |
451f74a2 |
368 | $body_message = getEntity($message, $ent_num); |
369 | if (($body_message->header->type0 == 'text') || |
8bd0068d |
370 | ($body_message->header->type0 == 'rfc822')) { |
3d8371be |
371 | $body = mime_fetch_body ($imap_stream, $id, $ent_num); |
451f74a2 |
372 | $body = decodeBody($body, $body_message->header->encoding); |
e842b215 |
373 | |
374 | if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && |
8bd0068d |
375 | function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_decode')) { |
e842b215 |
376 | if (mb_detect_encoding($body) != 'ASCII') { |
33a55f5a |
377 | $body = call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_decode',$body); |
e842b215 |
378 | } |
379 | } |
d849b570 |
380 | |
381 | /* As of 1.5.2, $body is passed (and modified) by reference */ |
382 | do_hook('message_body', $body); |
23bcec6f |
383 | |
3d8371be |
384 | /* If there are other types that shouldn't be formatted, add |
8bd0068d |
385 | * them here. |
386 | */ |
3d8371be |
387 | |
451f74a2 |
388 | if ($body_message->header->type1 == 'html') { |
3d8371be |
389 | if ($show_html_default <> 1) { |
85015544 |
390 | $entity_conv = array(' ' => ' ', |
8bd0068d |
391 | '<p>' => "\n", |
392 | '<P>' => "\n", |
393 | '<br>' => "\n", |
394 | '<BR>' => "\n", |
395 | '<br />' => "\n", |
396 | '<BR />' => "\n", |
397 | '>' => '>', |
398 | '<' => '<'); |
85015544 |
399 | $body = strtr($body, $entity_conv); |
3d8371be |
400 | $body = strip_tags($body); |
85015544 |
401 | $body = trim($body); |
402 | translateText($body, $wrap_at, |
8bd0068d |
403 | $body_message->header->getParameter('charset')); |
a540f994 |
404 | } elseif ($use_iframe) { |
84410f31 |
405 | /** |
406 | * If we don't add html message between iframe tags, |
407 | * we must detect unsafe images and modify $has_unsafe_images. |
f8a1ed5a |
408 | */ |
758a7889 |
409 | $html_body = magicHTML($body, $id, $message, $mailbox); |
b6c52e61 |
410 | // Convert character set in order to display html mails in different character set |
411 | $html_body = charset_decode($body_message->header->getParameter('charset'),$html_body,false,true); |
84410f31 |
412 | |
2c25d36a |
413 | // creating iframe url |
414 | $iframeurl=sqm_baseuri().'src/view_html.php?' |
f8a1ed5a |
415 | . 'mailbox=' . $urlmailbox |
2c25d36a |
416 | . '&passed_id=' . $id |
417 | . '&ent_id=' . $ent_num |
418 | . '&view_unsafe_images=' . (int) $view_unsafe_images; |
419 | |
79d58d4c |
420 | global $oTemplate; |
421 | $oTemplate->assign('iframe_url', $iframeurl); |
51554708 |
422 | $oTemplate->assign('iframe_height', $iframe_height); |
79d58d4c |
423 | $oTemplate->assign('html_body', $html_body); |
2b665f28 |
424 | |
79d58d4c |
425 | $body = $oTemplate->fetch('read_html_iframe.tpl'); |
a3daaaf3 |
426 | } else { |
2c25d36a |
427 | // old way of html rendering |
b6c52e61 |
428 | /** |
758a7889 |
429 | * convert character set. charset_decode does not remove html special chars |
b6c52e61 |
430 | * applied by magicHTML functions and does not sanitize them second time if |
758a7889 |
431 | * fourth argument is true. |
432 | */ |
567dc524 |
433 | $charset = $body_message->header->getParameter('charset'); |
434 | if (!empty($charset)) { |
435 | $body = charset_decode($charset,$body,false,true); |
436 | } |
437 | $body = magicHTML($body, $id, $message, $mailbox); |
a3daaaf3 |
438 | } |
451f74a2 |
439 | } else { |
3d8371be |
440 | translateText($body, $wrap_at, |
8bd0068d |
441 | $body_message->header->getParameter('charset')); |
451f74a2 |
442 | } |
a2bfcbce |
443 | |
9ebace19 |
444 | /* |
445 | * Previously the links for downloading and unsafe images were printed |
446 | * under the mail. By putting the links in a global variable we can |
447 | * print it in the toolbar where it belongs. Since the original code was |
448 | * in this place it's left here. It might be possible to move it to some |
449 | * other place if that makes sense. The possibility to do so has not |
450 | * been evaluated yet. |
451 | */ |
452 | |
453 | // Initialize the global variable to an empty string. |
454 | // FIXME: To have $download_and_unsafe_link as a global variable might not be needed since the use of separate variables ($download_href, $unsafe_image_toggle_href, and $unsafe_image_toggle_text) for the templates was introduced. |
40a34e57 |
455 | $download_and_unsafe_link = ''; |
456 | |
9ebace19 |
457 | // Prepare and build a link for downloading the mail. |
83cf04bd |
458 | $link = 'passed_id=' . $id . '&ent_id='.$ent_num. |
8bd0068d |
459 | '&mailbox=' . $urlmailbox .'&sort=' . $sort . |
460 | '&startMessage=' . $startMessage . '&show_more=0'; |
08b7f7cc |
461 | if (isset($passed_ent_id)) { |
462 | $link .= '&passed_ent_id='.$passed_ent_id; |
463 | } |
14c85e39 |
464 | $download_href = SM_PATH . 'src/download.php?absolute_dl=true&' . $link; |
9ebace19 |
465 | |
466 | // Always add the link for downloading the mail as a file to the global |
467 | // variable. |
955bfc8f |
468 | $download_and_unsafe_link .= "$nbsp|$nbsp" |
469 | . create_hyperlink($download_href, _("Download this as a file")); |
9ebace19 |
470 | |
471 | // Find out the right text to use in the link depending on the |
472 | // circumstances. If the unsafe images are displayed the link should |
473 | // hide them, if they aren't displayed the link should only appear if |
474 | // the mail really contains unsafe images. |
7aad7b77 |
475 | if ($view_unsafe_images) { |
23f617b8 |
476 | $text = _("Hide Unsafe Images"); |
7aad7b77 |
477 | } else { |
08b7f7cc |
478 | if (isset($has_unsafe_images) && $has_unsafe_images) { |
479 | $link .= '&view_unsafe_images=1'; |
480 | $text = _("View Unsafe Images"); |
481 | } else { |
482 | $text = ''; |
483 | } |
3d8371be |
484 | } |
9ebace19 |
485 | |
486 | // Only create a link for unsafe images if there's need for one. If so: |
487 | // add it to the global variable. |
83cf04bd |
488 | if($text != '') { |
14c85e39 |
489 | $unsafe_image_toggle_href = SM_PATH . 'src/read_body.php?'.$link; |
490 | $unsafe_image_toggle_text = $text; |
955bfc8f |
491 | $download_and_unsafe_link .= "$nbsp|$nbsp" |
492 | . create_hyperlink($unsafe_image_toggle_href, $text); |
83cf04bd |
493 | } |
3d8371be |
494 | } |
495 | return $body; |
451f74a2 |
496 | } |
b74ba498 |
497 | |
da1b55ad |
498 | /** |
a540f994 |
499 | * Generate attachments array for passing to templates. |
2b665f28 |
500 | * |
d67f519a |
501 | * @since 1.5.2 |
da1b55ad |
502 | * @param object $message SquirrelMail message object |
503 | * @param array $exclude_id message parts that are not attachments. |
504 | * @param string $mailbox mailbox name |
505 | * @param integer $id message id |
da1b55ad |
506 | */ |
d67f519a |
507 | function buildAttachmentArray($message, $exclude_id, $mailbox, $id) { |
508 | global $where, $what, $startMessage, $color, $passed_ent_id, $base_uri; |
451f74a2 |
509 | |
23bcec6f |
510 | $att_ar = $message->getAttachments($exclude_id); |
23bcec6f |
511 | $urlMailbox = urlencode($mailbox); |
512 | |
d67f519a |
513 | $attachments = array(); |
23bcec6f |
514 | foreach ($att_ar as $att) { |
fdc9d9b5 |
515 | $ent = $att->entity_id; |
2e25760a |
516 | $header = $att->header; |
f0c4dc12 |
517 | $type0 = strtolower($header->type0); |
518 | $type1 = strtolower($header->type1); |
2e25760a |
519 | $name = ''; |
d0187bd6 |
520 | $links = array(); |
21dab2dc |
521 | $links['download link']['text'] = _("Download"); |
202bcbcc |
522 | $links['download link']['href'] = $base_uri . |
8bd0068d |
523 | "src/download.php?absolute_dl=true&passed_id=$id&mailbox=$urlMailbox&ent_id=$ent"; |
2b665f28 |
524 | |
2e25760a |
525 | if ($type0 =='message' && $type1 == 'rfc822') { |
202bcbcc |
526 | $default_page = $base_uri . 'src/read_body.php'; |
2e25760a |
527 | $rfc822_header = $att->rfc822_header; |
098ea084 |
528 | $filename = $rfc822_header->subject; |
6cc08d8b |
529 | if (trim( $filename ) == '') { |
530 | $filename = 'untitled-[' . $ent . ']' ; |
08b7f7cc |
531 | } |
2e25760a |
532 | $from_o = $rfc822_header->from; |
533 | if (is_object($from_o)) { |
04ea844e |
534 | $from_name = decodeHeader($from_o->getAddress(false)); |
7e697748 |
535 | } elseif (is_array($from_o) && count($from_o) && is_object($from_o[0])) { |
536 | // something weird happens when a digest message is opened and you return to the digest |
537 | // now the from object is part of an array. Probably the parseHeader call overwrites the info |
538 | // retrieved from the bodystructure in a different way. We need to fix this later. |
539 | // possible starting point, do not fetch header we already have and inspect how |
540 | // the rfc822_header object behaves. |
541 | $from_name = decodeHeader($from_o[0]->getAddress(false)); |
2e25760a |
542 | } else { |
543 | $from_name = _("Unknown sender"); |
f0c4dc12 |
544 | } |
d0187bd6 |
545 | $description = _("From").': '.$from_name; |
23bcec6f |
546 | } else { |
202bcbcc |
547 | $default_page = $base_uri . 'src/download.php'; |
02474e43 |
548 | $filename = $att->getFilename(); |
f810c0b2 |
549 | if ($header->description) { |
098ea084 |
550 | $description = decodeHeader($header->description); |
f810c0b2 |
551 | } else { |
3d8371be |
552 | $description = ''; |
553 | } |
2e25760a |
554 | } |
555 | |
556 | $display_filename = $filename; |
3d8371be |
557 | if (isset($passed_ent_id)) { |
558 | $passed_ent_id_link = '&passed_ent_id='.$passed_ent_id; |
559 | } else { |
560 | $passed_ent_id_link = ''; |
561 | } |
562 | $defaultlink = $default_page . "?startMessage=$startMessage" |
8bd0068d |
563 | . "&passed_id=$id&mailbox=$urlMailbox" |
564 | . '&ent_id='.$ent.$passed_ent_id_link; |
2e25760a |
565 | if ($where && $what) { |
8bd0068d |
566 | $defaultlink .= '&where='. urlencode($where).'&what='.urlencode($what); |
2e25760a |
567 | } |
7e2ff844 |
568 | // IE does make use of mime content sniffing. Forcing a download |
569 | // prohibit execution of XSS inside an application/octet-stream attachment |
570 | if ($type0 == 'application' && $type1 == 'octet-stream') { |
571 | $defaultlink .= '&absolute_dl=true'; |
572 | } |
2b665f28 |
573 | |
3d8371be |
574 | /* This executes the attachment hook with a specific MIME-type. |
8bd0068d |
575 | * If that doesn't have results, it tries if there's a rule |
9b94c54d |
576 | * for a more generic type. Finally, a hook for ALL attachment |
577 | * types is run as well. |
8bd0068d |
578 | */ |
8dca4d22 |
579 | // First remember the default link. |
580 | $defaultlink_orig = $defaultlink; |
581 | |
d849b570 |
582 | /* The API for this hook has changed as of 1.5.2 so that all plugin |
583 | arguments are passed in an array instead of each their own plugin |
584 | argument, and arguments are passed by reference, so instead of |
585 | returning any changes, changes should simply be made to the original |
586 | arguments themselves. */ |
9c3b2d22 |
587 | $temp = array(&$links, &$startMessage, &$id, &$urlMailbox, &$ent, |
588 | &$defaultlink, &$display_filename, &$where, &$what); |
589 | do_hook("attachment $type0/$type1", $temp); |
8dca4d22 |
590 | if(count($links) <= 1 && $defaultlink == $defaultlink_orig) { |
d849b570 |
591 | /* The API for this hook has changed as of 1.5.2 so that all plugin |
592 | arguments are passed in an array instead of each their own plugin |
593 | argument, and arguments are passed by reference, so instead of |
594 | returning any changes, changes should simply be made to the original |
595 | arguments themselves. */ |
9c3b2d22 |
596 | $temp = array(&$links, &$startMessage, &$id, &$urlMailbox, &$ent, |
597 | &$defaultlink, &$display_filename, &$where, &$what); |
598 | do_hook("attachment $type0/*", $temp); |
2e25760a |
599 | } |
d849b570 |
600 | /* The API for this hook has changed as of 1.5.2 so that all plugin |
601 | arguments are passed in an array instead of each their own plugin |
602 | argument, and arguments are passed by reference, so instead of |
603 | returning any changes, changes should simply be made to the original |
604 | arguments themselves. */ |
9c3b2d22 |
605 | $temp = array(&$links, &$startMessage, &$id, &$urlMailbox, &$ent, |
606 | &$defaultlink, &$display_filename, &$where, &$what); |
8dca4d22 |
607 | // Do not let a generic plugin change the default link if a more |
608 | // specialized one already did it... |
609 | if ($defaultlink != $defaultlink_orig) { |
610 | $dummy = ''; |
611 | $temp[5] = &$dummy; |
612 | } |
9c3b2d22 |
613 | do_hook("attachment */*", $temp); |
77b88425 |
614 | |
d67f519a |
615 | $this_attachment = array(); |
616 | $this_attachment['Name'] = decodeHeader($display_filename); |
617 | $this_attachment['Description'] = $description; |
618 | $this_attachment['DefaultHREF'] = $defaultlink; |
619 | $this_attachment['DownloadHREF'] = $links['download link']['href']; |
620 | $this_attachment['ViewHREF'] = isset($links['attachment_common']) ? $links['attachment_common']['href'] : ''; |
621 | $this_attachment['Size'] = $header->size; |
622 | $this_attachment['ContentType'] = htmlspecialchars($type0 .'/'. $type1); |
623 | $this_attachment['OtherLinks'] = array(); |
3d8371be |
624 | foreach ($links as $val) { |
d0187bd6 |
625 | if ($val['text']==_("Download") || $val['text'] == _("View")) |
626 | continue; |
627 | if (empty($val['text']) && empty($val['extra'])) |
628 | continue; |
2b665f28 |
629 | |
d67f519a |
630 | $temp = array(); |
631 | $temp['HREF'] = $val['href']; |
632 | $temp['Text'] = (empty($val['text']) ? '' : $val['text']) . (empty($val['extra']) ? '' : $val['extra']); |
633 | $this_attachment['OtherLinks'][] = $temp; |
2e25760a |
634 | } |
d67f519a |
635 | $attachments[] = $this_attachment; |
2b665f28 |
636 | |
3d8371be |
637 | unset($links); |
2e25760a |
638 | } |
2b665f28 |
639 | |
d67f519a |
640 | return $attachments; |
641 | } |
642 | |
643 | /** |
644 | * Displays attachment links and information |
645 | * |
646 | * Since 1.3.0 function is not included in formatBody() call. |
647 | * |
648 | * Since 1.0.2 uses attachment $type0/$type1 hook. |
649 | * Since 1.2.5 uses attachment $type0/* hook. |
650 | * Since 1.5.0 uses attachments_bottom hook. |
651 | * Since 1.5.2 uses templates and does *not* return a value. |
652 | * |
653 | * @param object $message SquirrelMail message object |
654 | * @param array $exclude_id message parts that are not attachments. |
655 | * @param string $mailbox mailbox name |
656 | * @param integer $id message id |
657 | */ |
658 | function formatAttachments($message, $exclude_id, $mailbox, $id) { |
659 | global $oTemplate; |
2b665f28 |
660 | |
d67f519a |
661 | $attach = buildAttachmentArray($message, $exclude_id, $mailbox, $id); |
d0187bd6 |
662 | |
663 | $oTemplate->assign('attachments', $attach); |
664 | $oTemplate->display('read_attachments.tpl'); |
451f74a2 |
665 | } |
b74ba498 |
666 | |
7c7b74b3 |
667 | function sqimap_base64_decode(&$string) { |
7c0ec1d8 |
668 | |
b17a8968 |
669 | // Base64 encoded data goes in pairs of 4 bytes. To achieve on the |
7c0ec1d8 |
670 | // fly decoding (to reduce memory usage) you have to check if the |
671 | // data has incomplete pairs |
672 | |
b17a8968 |
673 | // Remove the noise in order to check if the 4 bytes pairs are complete |
7c0ec1d8 |
674 | $string = str_replace(array("\r\n","\n", "\r", " "),array('','','',''),$string); |
675 | |
42ce44f8 |
676 | $sStringRem = ''; |
7c0ec1d8 |
677 | $iMod = strlen($string) % 4; |
678 | if ($iMod) { |
679 | $sStringRem = substr($string,-$iMod); |
b17a8968 |
680 | // Check if $sStringRem contains padding characters |
7c0ec1d8 |
681 | if (substr($sStringRem,-1) != '=') { |
682 | $string = substr($string,0,-$iMod); |
683 | } else { |
684 | $sStringRem = ''; |
685 | } |
686 | } |
7c7b74b3 |
687 | $string = base64_decode($string); |
7c0ec1d8 |
688 | return $sStringRem; |
7c7b74b3 |
689 | } |
690 | |
fdf7cef1 |
691 | /** |
fa26ab45 |
692 | * Decodes encoded string (usually message body) |
693 | * |
694 | * This function decodes a string (usually the message body) |
695 | * depending on the encoding type. Currently quoted-printable |
696 | * and base64 encodings are supported. |
697 | * |
698 | * The decode_body hook was added to this function in 1.4.2/1.5.0. |
699 | * The $force_crlf parameter was added in 1.5.2. |
700 | * |
701 | * @param string $string The encoded string |
702 | * @param string $encoding used encoding |
703 | * @param string $force_crlf Whether or not to force CRLF or LF |
704 | * line endings (or to leave as is). |
705 | * If given as "LF", line endings will |
706 | * all be converted to LF; if "CRLF", |
707 | * line endings will all be converted |
708 | * to CRLF. If given as an empty value, |
709 | * the global $default_force_crlf will |
710 | * be consulted (it can be specified in |
711 | * config/config_local.php). Otherwise, |
712 | * any other value will cause the string |
713 | * to be left alone. Note that this will |
714 | * be overridden to "LF" if not using at |
715 | * least PHP version 4.3.0. (OPTIONAL; |
716 | * default is empty - consult global |
717 | * default value) |
718 | * |
719 | * @return string The decoded string |
fdf7cef1 |
720 | * |
fdf7cef1 |
721 | * @since 1.0 |
fa26ab45 |
722 | * |
fdf7cef1 |
723 | */ |
fa26ab45 |
724 | function decodeBody($string, $encoding, $force_crlf='') { |
725 | |
726 | global $force_crlf_default; |
727 | if (empty($force_crlf)) $force_crlf = $force_crlf_default; |
728 | $force_crlf = strtoupper($force_crlf); |
729 | |
730 | // must force line endings to LF due to broken |
731 | // quoted_printable_decode() in PHP versions |
732 | // before 4.3.0 (see below) |
733 | // |
734 | if (!check_php_version(4, 3, 0) || $force_crlf == 'LF') |
735 | $string = str_replace("\r\n", "\n", $string); |
736 | else if ($force_crlf == 'CRLF') |
737 | $string = str_replace("\n", "\r\n", $string); |
83be314a |
738 | |
b583c3e8 |
739 | $encoding = strtolower($encoding); |
3d8371be |
740 | |
d849b570 |
741 | $encoding_handler = do_hook('decode_body', $encoding); |
5166f86a |
742 | |
743 | |
fa26ab45 |
744 | // plugins get first shot at decoding the string |
5166f86a |
745 | // |
746 | if (!empty($encoding_handler) && function_exists($encoding_handler)) { |
fa26ab45 |
747 | $string = $encoding_handler('decode', $string); |
5166f86a |
748 | |
fdf7cef1 |
749 | } elseif ($encoding == 'quoted-printable' || |
8bd0068d |
750 | $encoding == 'quoted_printable') { |
fa26ab45 |
751 | |
752 | // quoted_printable_decode() function is broken in older |
753 | // php versions. Text with \r\n decoding was fixed only |
754 | // in php 4.3.0. Minimal code requirement is PHP 4.0.4+ |
755 | // and the above call to: str_replace("\r\n", "\n", $string); |
756 | // |
757 | $string = quoted_printable_decode($string); |
758 | |
fdf7cef1 |
759 | } elseif ($encoding == 'base64') { |
fa26ab45 |
760 | $string = base64_decode($string); |
b583c3e8 |
761 | } |
3d8371be |
762 | |
b583c3e8 |
763 | // All other encodings are returned raw. |
fa26ab45 |
764 | return $string; |
451f74a2 |
765 | } |
766 | |
9f7f68c3 |
767 | /** |
8bd0068d |
768 | * Decodes headers |
769 | * |
e1115979 |
770 | * This function decodes strings that are encoded according to |
8bd0068d |
771 | * RFC1522 (MIME Part Two: Message Header Extensions for Non-ASCII Text). |
772 | * Patched by Christian Schmidt <christian@ostenfeld.dk> 23/03/2002 |
773 | * |
774 | * @param string $string header string that has to be made readable |
775 | * @param boolean $utfencode change message in order to be readable on user's charset. defaults to true |
bcae324b |
776 | * @param boolean $htmlsafe preserve spaces and sanitize html special characters. defaults to true |
8bd0068d |
777 | * @param boolean $decide decide if string can be utfencoded. defaults to false |
778 | * @return string decoded header string |
779 | */ |
bcae324b |
780 | function decodeHeader ($string, $utfencode=true,$htmlsafe=true,$decide=false) { |
d6f584fc |
781 | global $languages, $squirrelmail_language,$default_charset; |
79e07c7e |
782 | if (is_array($string)) { |
783 | $string = implode("\n", $string); |
784 | } |
da2415c1 |
785 | |
10dec454 |
786 | if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && |
8bd0068d |
787 | function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_decodeheader')) { |
33a55f5a |
788 | $string = call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_decodeheader', $string); |
08b7f7cc |
789 | // Do we need to return at this point? |
790 | // return $string; |
83be314a |
791 | } |
79e07c7e |
792 | $i = 0; |
08b7f7cc |
793 | $iLastMatch = -2; |
db65b6b0 |
794 | $encoded = true; |
0a06275a |
795 | |
098ea084 |
796 | $aString = explode(' ',$string); |
08b7f7cc |
797 | $ret = ''; |
098ea084 |
798 | foreach ($aString as $chunk) { |
358a78a1 |
799 | if ($encoded && $chunk === '') { |
08b7f7cc |
800 | continue; |
358a78a1 |
801 | } elseif ($chunk === '') { |
08b7f7cc |
802 | $ret .= ' '; |
803 | continue; |
804 | } |
098ea084 |
805 | $encoded = false; |
08b7f7cc |
806 | /* if encoded words are not separated by a linear-space-white we still catch them */ |
807 | $j = $i-1; |
7e6ca3e8 |
808 | |
08b7f7cc |
809 | while ($match = preg_match('/^(.*)=\?([^?]*)\?(Q|B)\?([^?]*)\?=(.*)$/Ui',$chunk,$res)) { |
810 | /* if the last chunk isn't an encoded string then put back the space, otherwise don't */ |
811 | if ($iLastMatch !== $j) { |
bcae324b |
812 | if ($htmlsafe) { |
9f7f68c3 |
813 | $ret .= ' '; |
08b7f7cc |
814 | } else { |
815 | $ret .= ' '; |
816 | } |
817 | } |
818 | $iLastMatch = $i; |
819 | $j = $i; |
bcae324b |
820 | if ($htmlsafe) { |
cb718de0 |
821 | $ret .= htmlspecialchars($res[1]); |
822 | } else { |
823 | $ret .= $res[1]; |
824 | } |
098ea084 |
825 | $encoding = ucfirst($res[3]); |
d6f584fc |
826 | |
827 | /* decide about valid decoding */ |
828 | if ($decide && is_conversion_safe($res[2])) { |
8bd0068d |
829 | $utfencode=true; |
830 | $can_be_encoded=true; |
d6f584fc |
831 | } else { |
8bd0068d |
832 | $can_be_encoded=false; |
d6f584fc |
833 | } |
098ea084 |
834 | switch ($encoding) |
835 | { |
8bd0068d |
836 | case 'B': |
837 | $replace = base64_decode($res[4]); |
838 | if ($utfencode) { |
839 | if ($can_be_encoded) { |
840 | /* convert string to different charset, |
841 | * if functions asks for it (usually in compose) |
842 | */ |
bcae324b |
843 | $ret .= charset_convert($res[2],$replace,$default_charset,$htmlsafe); |
8bd0068d |
844 | } else { |
845 | // convert string to html codes in order to display it |
846 | $ret .= charset_decode($res[2],$replace); |
847 | } |
fab65ca9 |
848 | } else { |
bcae324b |
849 | if ($htmlsafe) { |
8bd0068d |
850 | $replace = htmlspecialchars($replace); |
851 | } |
852 | $ret.= $replace; |
fab65ca9 |
853 | } |
8bd0068d |
854 | break; |
855 | case 'Q': |
856 | $replace = str_replace('_', ' ', $res[4]); |
857 | $replace = preg_replace('/=([0-9a-f]{2})/ie', 'chr(hexdec("\1"))', |
858 | $replace); |
859 | if ($utfencode) { |
860 | if ($can_be_encoded) { |
861 | /* convert string to different charset, |
862 | * if functions asks for it (usually in compose) |
863 | */ |
bcae324b |
864 | $replace = charset_convert($res[2], $replace,$default_charset,$htmlsafe); |
8bd0068d |
865 | } else { |
866 | // convert string to html codes in order to display it |
867 | $replace = charset_decode($res[2], $replace); |
868 | } |
869 | } else { |
bcae324b |
870 | if ($htmlsafe) { |
8bd0068d |
871 | $replace = htmlspecialchars($replace); |
872 | } |
098ea084 |
873 | } |
8bd0068d |
874 | $ret .= $replace; |
875 | break; |
876 | default: |
877 | break; |
79e07c7e |
878 | } |
098ea084 |
879 | $chunk = $res[5]; |
880 | $encoded = true; |
08b7f7cc |
881 | } |
882 | if (!$encoded) { |
bcae324b |
883 | if ($htmlsafe) { |
9f7f68c3 |
884 | $ret .= ' '; |
08b7f7cc |
885 | } else { |
886 | $ret .= ' '; |
da2415c1 |
887 | } |
08b7f7cc |
888 | } |
dc3d13a7 |
889 | |
bcae324b |
890 | if (!$encoded && $htmlsafe) { |
dc3d13a7 |
891 | $ret .= htmlspecialchars($chunk); |
892 | } else { |
893 | $ret .= $chunk; |
894 | } |
098ea084 |
895 | ++$i; |
896 | } |
fd81e884 |
897 | /* remove the first added space */ |
898 | if ($ret) { |
bcae324b |
899 | if ($htmlsafe) { |
9f7f68c3 |
900 | $ret = substr($ret,5); |
fd81e884 |
901 | } else { |
902 | $ret = substr($ret,1); |
903 | } |
904 | } |
da2415c1 |
905 | |
08b7f7cc |
906 | return $ret; |
451f74a2 |
907 | } |
908 | |
9f7f68c3 |
909 | /** |
a24cf710 |
910 | * Encodes header |
8bd0068d |
911 | * |
a24cf710 |
912 | * Function uses XTRA_CODE _encodeheader function, if such function exists. |
a24cf710 |
913 | * |
758a7889 |
914 | * Function uses Q encoding by default and encodes a string according to RFC |
915 | * 1522 for use in headers if it contains 8-bit characters or anything that |
a24cf710 |
916 | * looks like it should be encoded. |
8bd0068d |
917 | * |
758a7889 |
918 | * Function switches to B encoding and encodeHeaderBase64() function, if |
919 | * string is 8bit and multibyte character set supported by mbstring extension |
920 | * is used. It can cause E_USER_NOTICE errors, if interface is used with |
f270a6eb |
921 | * multibyte character set unsupported by mbstring extension. |
922 | * |
8bd0068d |
923 | * @param string $string header string, that has to be encoded |
924 | * @return string quoted-printable encoded string |
f270a6eb |
925 | * @todo make $mb_charsets system wide constant |
8bd0068d |
926 | */ |
451f74a2 |
927 | function encodeHeader ($string) { |
6fbd125b |
928 | global $default_charset, $languages, $squirrelmail_language; |
83be314a |
929 | |
10dec454 |
930 | if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && |
8bd0068d |
931 | function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_encodeheader')) { |
33a55f5a |
932 | return call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_encodeheader', $string); |
83be314a |
933 | } |
793cc001 |
934 | |
a24cf710 |
935 | // Use B encoding for multibyte charsets |
f270a6eb |
936 | $mb_charsets = array('utf-8','big5','gb2313','euc-kr'); |
937 | if (in_array($default_charset,$mb_charsets) && |
938 | in_array($default_charset,sq_mb_list_encodings()) && |
939 | sq_is8bit($string)) { |
940 | return encodeHeaderBase64($string,$default_charset); |
941 | } elseif (in_array($default_charset,$mb_charsets) && |
942 | sq_is8bit($string) && |
943 | ! in_array($default_charset,sq_mb_list_encodings())) { |
944 | // Add E_USER_NOTICE error here (can cause 'Cannot add header information' warning in compose.php) |
945 | // trigger_error('encodeHeader: Multibyte character set unsupported by mbstring extension.',E_USER_NOTICE); |
946 | } |
a24cf710 |
947 | |
451f74a2 |
948 | // Encode only if the string contains 8-bit characters or =? |
3d8371be |
949 | $j = strlen($string); |
098ea084 |
950 | $max_l = 75 - strlen($default_charset) - 7; |
951 | $aRet = array(); |
451f74a2 |
952 | $ret = ''; |
c96c32f4 |
953 | $iEncStart = $enc_init = false; |
0d53f0f9 |
954 | $cur_l = $iOffset = 0; |
3d8371be |
955 | for($i = 0; $i < $j; ++$i) { |
c96c32f4 |
956 | switch($string{$i}) |
957 | { |
8bd0068d |
958 | case '=': |
959 | case '<': |
960 | case '>': |
961 | case ',': |
962 | case '?': |
963 | case '_': |
964 | if ($iEncStart === false) { |
965 | $iEncStart = $i; |
966 | } |
967 | $cur_l+=3; |
968 | if ($cur_l > ($max_l-2)) { |
969 | /* if there is an stringpart that doesn't need encoding, add it */ |
08b7f7cc |
970 | $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); |
c96c32f4 |
971 | $aRet[] = "=?$default_charset?Q?$ret?="; |
972 | $iOffset = $i; |
973 | $cur_l = 0; |
974 | $ret = ''; |
975 | $iEncStart = false; |
08b7f7cc |
976 | } else { |
8bd0068d |
977 | $ret .= sprintf("=%02X",ord($string{$i})); |
c96c32f4 |
978 | } |
8bd0068d |
979 | break; |
980 | case '(': |
981 | case ')': |
982 | if ($iEncStart !== false) { |
08b7f7cc |
983 | $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); |
8bd0068d |
984 | $aRet[] = "=?$default_charset?Q?$ret?="; |
c96c32f4 |
985 | $iOffset = $i; |
8bd0068d |
986 | $cur_l = 0; |
987 | $ret = ''; |
988 | $iEncStart = false; |
c96c32f4 |
989 | } |
8bd0068d |
990 | break; |
991 | case ' ': |
c96c32f4 |
992 | if ($iEncStart !== false) { |
098ea084 |
993 | $cur_l++; |
994 | if ($cur_l > $max_l) { |
08b7f7cc |
995 | $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); |
c96c32f4 |
996 | $aRet[] = "=?$default_charset?Q?$ret?="; |
c96c32f4 |
997 | $iOffset = $i; |
998 | $cur_l = 0; |
098ea084 |
999 | $ret = ''; |
8bd0068d |
1000 | $iEncStart = false; |
08b7f7cc |
1001 | } else { |
8bd0068d |
1002 | $ret .= '_'; |
c96c32f4 |
1003 | } |
3d8371be |
1004 | } |
8bd0068d |
1005 | break; |
1006 | default: |
1007 | $k = ord($string{$i}); |
1008 | if ($k > 126) { |
1009 | if ($iEncStart === false) { |
1010 | // do not start encoding in the middle of a string, also take the rest of the word. |
1011 | $sLeadString = substr($string,0,$i); |
1012 | $aLeadString = explode(' ',$sLeadString); |
1013 | $sToBeEncoded = array_pop($aLeadString); |
1014 | $iEncStart = $i - strlen($sToBeEncoded); |
1015 | $ret .= $sToBeEncoded; |
1016 | $cur_l += strlen($sToBeEncoded); |
1017 | } |
1018 | $cur_l += 3; |
1019 | /* first we add the encoded string that reached it's max size */ |
1020 | if ($cur_l > ($max_l-2)) { |
1021 | $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); |
1022 | $aRet[] = "=?$default_charset?Q?$ret?= "; /* the next part is also encoded => separate by space */ |
1023 | $cur_l = 3; |
1024 | $ret = ''; |
1025 | $iOffset = $i; |
1026 | $iEncStart = $i; |
1027 | } |
1028 | $enc_init = true; |
1029 | $ret .= sprintf("=%02X", $k); |
1030 | } else { |
1031 | if ($iEncStart !== false) { |
1032 | $cur_l++; |
1033 | if ($cur_l > $max_l) { |
1034 | $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); |
1035 | $aRet[] = "=?$default_charset?Q?$ret?="; |
1036 | $iEncStart = false; |
1037 | $iOffset = $i; |
1038 | $cur_l = 0; |
1039 | $ret = ''; |
1040 | } else { |
1041 | $ret .= $string{$i}; |
1042 | } |
1043 | } |
1044 | } |
1045 | break; |
f7b3ba37 |
1046 | } |
451f74a2 |
1047 | } |
793cc001 |
1048 | |
c96c32f4 |
1049 | if ($enc_init) { |
1050 | if ($iEncStart !== false) { |
1051 | $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); |
1052 | $aRet[] = "=?$default_charset?Q?$ret?="; |
1053 | } else { |
1054 | $aRet[] = substr($string,$iOffset); |
1055 | } |
1056 | $string = implode('',$aRet); |
451f74a2 |
1057 | } |
3d8371be |
1058 | return $string; |
451f74a2 |
1059 | } |
b74ba498 |
1060 | |
f270a6eb |
1061 | /** |
1062 | * Encodes string according to rfc2047 B encoding header formating rules |
1063 | * |
758a7889 |
1064 | * It is recommended way to encode headers with character sets that store |
f270a6eb |
1065 | * symbols in more than one byte. |
1066 | * |
1067 | * Function requires mbstring support. If required mbstring functions are missing, |
1068 | * function returns false and sets E_USER_WARNING level error message. |
1069 | * |
758a7889 |
1070 | * Minimal requirements - php 4.0.6 with mbstring extension. Please note, |
1071 | * that mbstring functions will generate E_WARNING errors, if unsupported |
f270a6eb |
1072 | * character set is used. mb_encode_mimeheader function provided by php |
1073 | * mbstring extension is not used in order to get better control of header |
1074 | * encoding. |
1075 | * |
758a7889 |
1076 | * Used php code functions - function_exists(), trigger_error(), strlen() |
1077 | * (is used with charset names and base64 strings). Used php mbstring |
f270a6eb |
1078 | * functions - mb_strlen and mb_substr. |
1079 | * |
758a7889 |
1080 | * Related documents: rfc 2045 (BASE64 encoding), rfc 2047 (mime header |
f270a6eb |
1081 | * encoding), rfc 2822 (header folding) |
1082 | * |
1083 | * @param string $string header string that must be encoded |
758a7889 |
1084 | * @param string $charset character set. Must be supported by mbstring extension. |
f270a6eb |
1085 | * Use sq_mb_list_encodings() to detect supported charsets. |
1086 | * @return string string encoded according to rfc2047 B encoding formating rules |
1087 | * @since 1.5.1 |
1088 | * @todo First header line can be wrapped to $iMaxLength - $HeaderFieldLength - 1 |
1089 | * @todo Do we want to control max length of header? |
1090 | * @todo Do we want to control EOL (end-of-line) marker? |
1091 | * @todo Do we want to translate error message? |
1092 | */ |
1093 | function encodeHeaderBase64($string,$charset) { |
1094 | /** |
1095 | * Check mbstring function requirements. |
1096 | */ |
1097 | if (! function_exists('mb_strlen') || |
1098 | ! function_exists('mb_substr')) { |
1099 | // set E_USER_WARNING |
1100 | trigger_error('encodeHeaderBase64: Required mbstring functions are missing.',E_USER_WARNING); |
1101 | // return false |
1102 | return false; |
1103 | } |
1104 | |
1105 | // initial return array |
1106 | $aRet = array(); |
1107 | |
1108 | /** |
1109 | * header length = 75 symbols max (same as in encodeHeader) |
1110 | * remove $charset length |
1111 | * remove =? ? ?= (5 chars) |
1112 | * remove 2 more chars (\r\n ?) |
1113 | */ |
1114 | $iMaxLength = 75 - strlen($charset) - 7; |
1115 | |
1116 | // set first character position |
1117 | $iStartCharNum = 0; |
1118 | |
1119 | // loop through all characters. count characters and not bytes. |
1120 | for ($iCharNum=1; $iCharNum<=mb_strlen($string,$charset); $iCharNum++) { |
1121 | // encode string from starting character to current character. |
1122 | $encoded_string = base64_encode(mb_substr($string,$iStartCharNum,$iCharNum-$iStartCharNum,$charset)); |
1123 | |
1124 | // Check encoded string length |
1125 | if(strlen($encoded_string)>$iMaxLength) { |
1126 | // if string exceeds max length, reduce number of encoded characters and add encoded string part to array |
1127 | $aRet[] = base64_encode(mb_substr($string,$iStartCharNum,$iCharNum-$iStartCharNum-1,$charset)); |
1128 | |
1129 | // set new starting character |
1130 | $iStartCharNum = $iCharNum-1; |
1131 | |
1132 | // encode last char (in case it is last character in string) |
1133 | $encoded_string = base64_encode(mb_substr($string,$iStartCharNum,$iCharNum-$iStartCharNum,$charset)); |
1134 | } // if string is shorter than max length - add next character |
1135 | } |
1136 | |
1137 | // add last encoded string to array |
1138 | $aRet[] = $encoded_string; |
1139 | |
1140 | // set initial return string |
1141 | $sRet = ''; |
1142 | |
1143 | // loop through encoded strings |
1144 | foreach($aRet as $string) { |
1145 | // TODO: Do we want to control EOL (end-of-line) marker |
1146 | if ($sRet!='') $sRet.= " "; |
1147 | |
1148 | // add header tags and encoded string to return string |
1149 | $sRet.= '=?'.$charset.'?B?'.$string.'?='; |
1150 | } |
1151 | |
1152 | return $sRet; |
1153 | } |
1154 | |
691a2d25 |
1155 | /* This function trys to locate the entity_id of a specific mime element */ |
3d8371be |
1156 | function find_ent_id($id, $message) { |
a171b359 |
1157 | for ($i = 0, $ret = ''; $ret == '' && $i < count($message->entities); $i++) { |
1158 | if ($message->entities[$i]->header->type0 == 'multipart') { |
3d8371be |
1159 | $ret = find_ent_id($id, $message->entities[$i]); |
451f74a2 |
1160 | } else { |
3d8371be |
1161 | if (strcasecmp($message->entities[$i]->header->id, $id) == 0) { |
d8cffbab |
1162 | // if (sq_check_save_extension($message->entities[$i])) { |
8bd0068d |
1163 | return $message->entities[$i]->entity_id; |
da2415c1 |
1164 | // } |
c8f5f606 |
1165 | } elseif (!empty($message->entities[$i]->header->parameters['name'])) { |
1166 | /** |
1167 | * This is part of a fix for Outlook Express 6.x generating |
1168 | * cid URLs without creating content-id headers |
1169 | * @@JA - 20050207 |
1170 | */ |
1171 | if (strcasecmp($message->entities[$i]->header->parameters['name'], $id) == 0) { |
1172 | return $message->entities[$i]->entity_id; |
1173 | } |
3d8371be |
1174 | } |
a3daaaf3 |
1175 | } |
451f74a2 |
1176 | } |
3d8371be |
1177 | return $ret; |
451f74a2 |
1178 | } |
a3daaaf3 |
1179 | |
e5e9381a |
1180 | function sq_check_save_extension($message) { |
1181 | $filename = $message->getFilename(); |
1182 | $ext = substr($filename, strrpos($filename,'.')+1); |
1183 | $save_extensions = array('jpg','jpeg','gif','png','bmp'); |
3d8371be |
1184 | return in_array($ext, $save_extensions); |
e5e9381a |
1185 | } |
1186 | |
1187 | |
691a2d25 |
1188 | /** |
8bd0068d |
1189 | ** HTMLFILTER ROUTINES |
1190 | */ |
451f74a2 |
1191 | |
2dd879b8 |
1192 | /** |
0493ed11 |
1193 | * This function checks attribute values for entity-encoded values |
1194 | * and returns them translated into 8-bit strings so we can run |
1195 | * checks on them. |
8bd0068d |
1196 | * |
0493ed11 |
1197 | * @param $attvalue A string to run entity check against. |
1198 | * @return Nothing, modifies a reference value. |
8bd0068d |
1199 | */ |
0493ed11 |
1200 | function sq_defang(&$attvalue){ |
1201 | $me = 'sq_defang'; |
2dd879b8 |
1202 | /** |
0493ed11 |
1203 | * Skip this if there aren't ampersands or backslashes. |
8bd0068d |
1204 | */ |
0493ed11 |
1205 | if (strpos($attvalue, '&') === false |
1206 | && strpos($attvalue, '\\') === false){ |
1207 | return; |
2dd879b8 |
1208 | } |
0493ed11 |
1209 | $m = false; |
2b665f28 |
1210 | // before deent, translate the dangerous unicode characters and ... to safe values |
1211 | // otherwise the regular expressions do not match. |
1212 | |
1213 | |
1214 | |
0493ed11 |
1215 | do { |
1216 | $m = false; |
1217 | $m = $m || sq_deent($attvalue, '/\�*(\d+);*/s'); |
1218 | $m = $m || sq_deent($attvalue, '/\�*((\d|[a-f])+);*/si', true); |
1219 | $m = $m || sq_deent($attvalue, '/\\\\(\d+)/s', true); |
1220 | } while ($m == true); |
1221 | $attvalue = stripslashes($attvalue); |
2dd879b8 |
1222 | } |
1223 | |
1224 | /** |
8bd0068d |
1225 | * Kill any tabs, newlines, or carriage returns. Our friends the |
1226 | * makers of the browser with 95% market value decided that it'd |
1227 | * be funny to make "java[tab]script" be just as good as "javascript". |
1228 | * |
1229 | * @param attvalue The attribute value before extraneous spaces removed. |
0493ed11 |
1230 | * @return attvalue Nothing, modifies a reference value. |
8bd0068d |
1231 | */ |
0493ed11 |
1232 | function sq_unspace(&$attvalue){ |
1233 | $me = 'sq_unspace'; |
1234 | if (strcspn($attvalue, "\t\r\n\0 ") != strlen($attvalue)){ |
1235 | $attvalue = str_replace(Array("\t", "\r", "\n", "\0", " "), |
1236 | Array('', '', '', '', ''), $attvalue); |
2dd879b8 |
1237 | } |
2dd879b8 |
1238 | } |
1239 | |
2b665f28 |
1240 | /** |
88de4926 |
1241 | * Translate all dangerous Unicode or Shift_JIS characters which are accepted by |
2b665f28 |
1242 | * IE as regular characters. |
1243 | * |
1244 | * @param attvalue The attribute value before dangerous characters are translated. |
1245 | * @return attvalue Nothing, modifies a reference value. |
1246 | * @author Marc Groot Koerkamp. |
1247 | */ |
1248 | function sq_fixIE_idiocy(&$attvalue) { |
1249 | // remove NUL |
1250 | $attvalue = str_replace("\0", "", $attvalue); |
1251 | // remove comments |
1252 | $attvalue = preg_replace("/(\/\*.*?\*\/)/","",$attvalue); |
1253 | |
88de4926 |
1254 | // IE has the evil habit of accepting every possible value for the attribute expression. |
1255 | // The table below contains characters which are parsed by IE if they are used in the "expression" |
2b665f28 |
1256 | // attribute value. |
1257 | $aDangerousCharsReplacementTable = array( |
1258 | array('ʟ', 'ʟ' ,/* L UNICODE IPA Extension */ |
1259 | 'ʀ', 'ʀ' ,/* R UNICODE IPA Extension */ |
1260 | 'ɴ', 'ɴ' ,/* N UNICODE IPA Extension */ |
567dc524 |
1261 | 'E', 'E' ,/* Unicode FULLWIDTH LATIN CAPITAL LETTER E */ |
1262 | 'e', 'e' ,/* Unicode FULLWIDTH LATIN SMALL LETTER E */ |
2b665f28 |
1263 | 'X', 'X',/* Unicode FULLWIDTH LATIN CAPITAL LETTER X */ |
1264 | 'x', 'x',/* Unicode FULLWIDTH LATIN SMALL LETTER X */ |
1265 | 'P', 'P',/* Unicode FULLWIDTH LATIN CAPITAL LETTER P */ |
1266 | 'p', 'p',/* Unicode FULLWIDTH LATIN SMALL LETTER P */ |
1267 | 'R', 'R',/* Unicode FULLWIDTH LATIN CAPITAL LETTER R */ |
1268 | 'r', 'r',/* Unicode FULLWIDTH LATIN SMALL LETTER R */ |
1269 | 'S', 'S',/* Unicode FULLWIDTH LATIN CAPITAL LETTER S */ |
1270 | 's', 's',/* Unicode FULLWIDTH LATIN SMALL LETTER S */ |
1271 | 'I', 'I',/* Unicode FULLWIDTH LATIN CAPITAL LETTER I */ |
1272 | 'i', 'i',/* Unicode FULLWIDTH LATIN SMALL LETTER I */ |
1273 | 'O', 'O',/* Unicode FULLWIDTH LATIN CAPITAL LETTER O */ |
1274 | 'o', 'o',/* Unicode FULLWIDTH LATIN SMALL LETTER O */ |
1275 | 'N', 'N',/* Unicode FULLWIDTH LATIN CAPITAL LETTER N */ |
1276 | 'n', 'n',/* Unicode FULLWIDTH LATIN SMALL LETTER N */ |
1277 | 'L', 'L',/* Unicode FULLWIDTH LATIN CAPITAL LETTER L */ |
1278 | 'l', 'l',/* Unicode FULLWIDTH LATIN SMALL LETTER L */ |
1279 | 'U', 'U',/* Unicode FULLWIDTH LATIN CAPITAL LETTER U */ |
1280 | 'u', 'u',/* Unicode FULLWIDTH LATIN SMALL LETTER U */ |
1281 | 'ⁿ', 'ⁿ' ,/* Unicode SUPERSCRIPT LATIN SMALL LETTER N */ |
567dc524 |
1282 | "\xEF\xBC\xA5", /* Shift JIS FULLWIDTH LATIN CAPITAL LETTER E */ // in unicode this is some Chinese char range |
1283 | "\xEF\xBD\x85", /* Shift JIS FULLWIDTH LATIN SMALL LETTER E */ |
1284 | "\xEF\xBC\xB8", /* Shift JIS FULLWIDTH LATIN CAPITAL LETTER X */ |
1285 | "\xEF\xBD\x98", /* Shift JIS FULLWIDTH LATIN SMALL LETTER X */ |
1286 | "\xEF\xBC\xB0", /* Shift JIS FULLWIDTH LATIN CAPITAL LETTER P */ |
1287 | "\xEF\xBD\x90", /* Shift JIS FULLWIDTH LATIN SMALL LETTER P */ |
1288 | "\xEF\xBC\xB2", /* Shift JIS FULLWIDTH LATIN CAPITAL LETTER R */ |
1289 | "\xEF\xBD\x92", /* Shift JIS FULLWIDTH LATIN SMALL LETTER R */ |
1290 | "\xEF\xBC\xB3", /* Shift JIS FULLWIDTH LATIN CAPITAL LETTER S */ |
1291 | "\xEF\xBD\x93", /* Shift JIS FULLWIDTH LATIN SMALL LETTER S */ |
1292 | "\xEF\xBC\xA9", /* Shift JIS FULLWIDTH LATIN CAPITAL LETTER I */ |
1293 | "\xEF\xBD\x89", /* Shift JIS FULLWIDTH LATIN SMALL LETTER I */ |
1294 | "\xEF\xBC\xAF", /* Shift JIS FULLWIDTH LATIN CAPITAL LETTER O */ |
1295 | "\xEF\xBD\x8F", /* Shift JIS FULLWIDTH LATIN SMALL LETTER O */ |
1296 | "\xEF\xBC\xAE", /* Shift JIS FULLWIDTH LATIN CAPITAL LETTER N */ |
1297 | "\xEF\xBD\x8E", /* Shift JIS FULLWIDTH LATIN SMALL LETTER N */ |
1298 | "\xEF\xBC\xAC", /* Shift JIS FULLWIDTH LATIN CAPITAL LETTER L */ |
1299 | "\xEF\xBD\x8C", /* Shift JIS FULLWIDTH LATIN SMALL LETTER L */ |
1300 | "\xEF\xBC\xB5", /* Shift JIS FULLWIDTH LATIN CAPITAL LETTER U */ |
1301 | "\xEF\xBD\x95", /* Shift JIS FULLWIDTH LATIN SMALL LETTER U */ |
1302 | "\xE2\x81\xBF", /* Shift JIS FULLWIDTH SUPERSCRIPT N */ |
1303 | "\xCA\x9F", /* L UNICODE IPA Extension */ |
1304 | "\xCA\x80", /* R UNICODE IPA Extension */ |
1305 | "\xC9\xB4"), /* N UNICODE IPA Extension */ |
2b665f28 |
1306 | array('l', 'l', 'r','r','n','n', |
567dc524 |
1307 | 'E','E','e','e','X','X','x','x','P','P','p','p','R','R','r','r','S','S','s','s','I','I', |
1308 | 'i','i','O','O','o','o','N','N','n','n','L','L','l','l','U','U','u','u','n','n', |
1309 | 'E','e','X','x','P','p','R','r','S','s','I','i','O','o','N','n','L','l','U','u','n','l','r','n')); |
2b665f28 |
1310 | $attvalue = str_replace($aDangerousCharsReplacementTable[0],$aDangerousCharsReplacementTable[1],$attvalue); |
1311 | |
88de4926 |
1312 | // Escapes are useful for special characters like "{}[]()'&. In other cases they are |
1313 | // used for XSS. |
2b665f28 |
1314 | $attvalue = preg_replace("/(\\\\)([a-zA-Z]{1})/",'$2',$attvalue); |
1315 | } |
1316 | |
691a2d25 |
1317 | /** |
8bd0068d |
1318 | * This function returns the final tag out of the tag name, an array |
1319 | * of attributes, and the type of the tag. This function is called by |
1320 | * sq_sanitize internally. |
1321 | * |
1322 | * @param $tagname the name of the tag. |
1323 | * @param $attary the array of attributes and their values |
1324 | * @param $tagtype The type of the tag (see in comments). |
1325 | * @return a string with the final tag representation. |
1326 | */ |
691a2d25 |
1327 | function sq_tagprint($tagname, $attary, $tagtype){ |
b583c3e8 |
1328 | $me = 'sq_tagprint'; |
3d8371be |
1329 | |
691a2d25 |
1330 | if ($tagtype == 2){ |
1331 | $fulltag = '</' . $tagname . '>'; |
1332 | } else { |
1333 | $fulltag = '<' . $tagname; |
1334 | if (is_array($attary) && sizeof($attary)){ |
1335 | $atts = Array(); |
1336 | while (list($attname, $attvalue) = each($attary)){ |
1337 | array_push($atts, "$attname=$attvalue"); |
1338 | } |
1339 | $fulltag .= ' ' . join(" ", $atts); |
1340 | } |
1341 | if ($tagtype == 3){ |
b583c3e8 |
1342 | $fulltag .= ' /'; |
691a2d25 |
1343 | } |
b583c3e8 |
1344 | $fulltag .= '>'; |
451f74a2 |
1345 | } |
691a2d25 |
1346 | return $fulltag; |
451f74a2 |
1347 | } |
a3daaaf3 |
1348 | |
691a2d25 |
1349 | /** |
8bd0068d |
1350 | * A small helper function to use with array_walk. Modifies a by-ref |
1351 | * value and makes it lowercase. |
1352 | * |
1353 | * @param $val a value passed by-ref. |
1354 | * @return void since it modifies a by-ref value. |
1355 | */ |
691a2d25 |
1356 | function sq_casenormalize(&$val){ |
1357 | $val = strtolower($val); |
1358 | } |
451f74a2 |
1359 | |
691a2d25 |
1360 | /** |
8bd0068d |
1361 | * This function skips any whitespace from the current position within |
1362 | * a string and to the next non-whitespace value. |
1363 | * |
1364 | * @param $body the string |
1365 | * @param $offset the offset within the string where we should start |
1366 | * looking for the next non-whitespace character. |
1367 | * @return the location within the $body where the next |
1368 | * non-whitespace char is located. |
1369 | */ |
691a2d25 |
1370 | function sq_skipspace($body, $offset){ |
b583c3e8 |
1371 | $me = 'sq_skipspace'; |
3d8371be |
1372 | preg_match('/^(\s*)/s', substr($body, $offset), $matches); |
691a2d25 |
1373 | if (sizeof($matches{1})){ |
1374 | $count = strlen($matches{1}); |
1375 | $offset += $count; |
451f74a2 |
1376 | } |
691a2d25 |
1377 | return $offset; |
451f74a2 |
1378 | } |
a3daaaf3 |
1379 | |
691a2d25 |
1380 | /** |
8bd0068d |
1381 | * This function looks for the next character within a string. It's |
1382 | * really just a glorified "strpos", except it catches if failures |
1383 | * nicely. |
1384 | * |
1385 | * @param $body The string to look for needle in. |
1386 | * @param $offset Start looking from this position. |
1387 | * @param $needle The character/string to look for. |
1388 | * @return location of the next occurance of the needle, or |
1389 | * strlen($body) if needle wasn't found. |
1390 | */ |
691a2d25 |
1391 | function sq_findnxstr($body, $offset, $needle){ |
3d8371be |
1392 | $me = 'sq_findnxstr'; |
691a2d25 |
1393 | $pos = strpos($body, $needle, $offset); |
1394 | if ($pos === FALSE){ |
1395 | $pos = strlen($body); |
451f74a2 |
1396 | } |
691a2d25 |
1397 | return $pos; |
451f74a2 |
1398 | } |
a3daaaf3 |
1399 | |
691a2d25 |
1400 | /** |
8bd0068d |
1401 | * This function takes a PCRE-style regexp and tries to match it |
1402 | * within the string. |
1403 | * |
1404 | * @param $body The string to look for needle in. |
1405 | * @param $offset Start looking from here. |
1406 | * @param $reg A PCRE-style regex to match. |
1407 | * @return Returns a false if no matches found, or an array |
1408 | * with the following members: |
1409 | * - integer with the location of the match within $body |
1410 | * - string with whatever content between offset and the match |
1411 | * - string with whatever it is we matched |
1412 | */ |
691a2d25 |
1413 | function sq_findnxreg($body, $offset, $reg){ |
b583c3e8 |
1414 | $me = 'sq_findnxreg'; |
691a2d25 |
1415 | $matches = Array(); |
1416 | $retarr = Array(); |
7d06541f |
1417 | preg_match("%^(.*?)($reg)%si", substr($body, $offset), $matches); |
1418 | if (!isset($matches{0}) || !$matches{0}){ |
691a2d25 |
1419 | $retarr = false; |
1420 | } else { |
1421 | $retarr{0} = $offset + strlen($matches{1}); |
1422 | $retarr{1} = $matches{1}; |
1423 | $retarr{2} = $matches{2}; |
1424 | } |
1425 | return $retarr; |
1426 | } |
a3daaaf3 |
1427 | |
691a2d25 |
1428 | /** |
8bd0068d |
1429 | * This function looks for the next tag. |
1430 | * |
1431 | * @param $body String where to look for the next tag. |
1432 | * @param $offset Start looking from here. |
1433 | * @return false if no more tags exist in the body, or |
1434 | * an array with the following members: |
1435 | * - string with the name of the tag |
1436 | * - array with attributes and their values |
1437 | * - integer with tag type (1, 2, or 3) |
1438 | * - integer where the tag starts (starting "<") |
1439 | * - integer where the tag ends (ending ">") |
1440 | * first three members will be false, if the tag is invalid. |
1441 | */ |
691a2d25 |
1442 | function sq_getnxtag($body, $offset){ |
b583c3e8 |
1443 | $me = 'sq_getnxtag'; |
691a2d25 |
1444 | if ($offset > strlen($body)){ |
1445 | return false; |
1446 | } |
1447 | $lt = sq_findnxstr($body, $offset, "<"); |
1448 | if ($lt == strlen($body)){ |
1449 | return false; |
1450 | } |
1451 | /** |
8bd0068d |
1452 | * We are here: |
1453 | * blah blah <tag attribute="value"> |
1454 | * \---------^ |
1455 | */ |
691a2d25 |
1456 | $pos = sq_skipspace($body, $lt+1); |
1457 | if ($pos >= strlen($body)){ |
1458 | return Array(false, false, false, $lt, strlen($body)); |
1459 | } |
1460 | /** |
8bd0068d |
1461 | * There are 3 kinds of tags: |
1462 | * 1. Opening tag, e.g.: |
1463 | * <a href="blah"> |
1464 | * 2. Closing tag, e.g.: |
1465 | * </a> |
1466 | * 3. XHTML-style content-less tag, e.g.: |
1467 | * <img src="blah" /> |
1468 | */ |
691a2d25 |
1469 | $tagtype = false; |
1470 | switch (substr($body, $pos, 1)){ |
3d8371be |
1471 | case '/': |
1472 | $tagtype = 2; |
1473 | $pos++; |
1474 | break; |
1475 | case '!': |
1476 | /** |
8bd0068d |
1477 | * A comment or an SGML declaration. |
1478 | */ |
3d8371be |
1479 | if (substr($body, $pos+1, 2) == "--"){ |
1480 | $gt = strpos($body, "-->", $pos); |
1481 | if ($gt === false){ |
1482 | $gt = strlen($body); |
1483 | } else { |
1484 | $gt += 2; |
1485 | } |
1486 | return Array(false, false, false, $lt, $gt); |
bb8d0799 |
1487 | } else { |
3d8371be |
1488 | $gt = sq_findnxstr($body, $pos, ">"); |
1489 | return Array(false, false, false, $lt, $gt); |
1490 | } |
1491 | break; |
1492 | default: |
1493 | /** |
8bd0068d |
1494 | * Assume tagtype 1 for now. If it's type 3, we'll switch values |
1495 | * later. |
1496 | */ |
3d8371be |
1497 | $tagtype = 1; |
1498 | break; |
691a2d25 |
1499 | } |
a3daaaf3 |
1500 | |
0493ed11 |
1501 | $tag_start = $pos; |
691a2d25 |
1502 | $tagname = ''; |
1503 | /** |
8bd0068d |
1504 | * Look for next [\W-_], which will indicate the end of the tag name. |
1505 | */ |
691a2d25 |
1506 | $regary = sq_findnxreg($body, $pos, "[^\w\-_]"); |
1507 | if ($regary == false){ |
1508 | return Array(false, false, false, $lt, strlen($body)); |
1509 | } |
1510 | list($pos, $tagname, $match) = $regary; |
1511 | $tagname = strtolower($tagname); |
1512 | |
1513 | /** |
8bd0068d |
1514 | * $match can be either of these: |
1515 | * '>' indicating the end of the tag entirely. |
1516 | * '\s' indicating the end of the tag name. |
1517 | * '/' indicating that this is type-3 xhtml tag. |
1518 | * |
1519 | * Whatever else we find there indicates an invalid tag. |
1520 | */ |
691a2d25 |
1521 | switch ($match){ |
3d8371be |
1522 | case '/': |
691a2d25 |
1523 | /** |
8bd0068d |
1524 | * This is an xhtml-style tag with a closing / at the |
1525 | * end, like so: <img src="blah" />. Check if it's followed |
1526 | * by the closing bracket. If not, then this tag is invalid |
1527 | */ |
3d8371be |
1528 | if (substr($body, $pos, 2) == "/>"){ |
1529 | $pos++; |
1530 | $tagtype = 3; |
1531 | } else { |
1532 | $gt = sq_findnxstr($body, $pos, ">"); |
1533 | $retary = Array(false, false, false, $lt, $gt); |
1534 | return $retary; |
1535 | } |
1536 | case '>': |
1537 | return Array($tagname, false, $tagtype, $lt, $pos); |
1538 | break; |
1539 | default: |
1540 | /** |
8bd0068d |
1541 | * Check if it's whitespace |
1542 | */ |
3d8371be |
1543 | if (!preg_match('/\s/', $match)){ |
1544 | /** |
8bd0068d |
1545 | * This is an invalid tag! Look for the next closing ">". |
1546 | */ |
7d06541f |
1547 | $gt = sq_findnxstr($body, $lt, ">"); |
3d8371be |
1548 | return Array(false, false, false, $lt, $gt); |
1549 | } |
1550 | break; |
691a2d25 |
1551 | } |
3d8371be |
1552 | |
691a2d25 |
1553 | /** |
8bd0068d |
1554 | * At this point we're here: |
1555 | * <tagname attribute='blah'> |
1556 | * \-------^ |
1557 | * |
1558 | * At this point we loop in order to find all attributes. |
1559 | */ |
691a2d25 |
1560 | $attname = ''; |
0493ed11 |
1561 | $atttype = false; |
691a2d25 |
1562 | $attary = Array(); |
1563 | |
1564 | while ($pos <= strlen($body)){ |
1565 | $pos = sq_skipspace($body, $pos); |
1566 | if ($pos == strlen($body)){ |
1567 | /** |
8bd0068d |
1568 | * Non-closed tag. |
1569 | */ |
691a2d25 |
1570 | return Array(false, false, false, $lt, $pos); |
1571 | } |
1572 | /** |
8bd0068d |
1573 | * See if we arrived at a ">" or "/>", which means that we reached |
1574 | * the end of the tag. |
1575 | */ |
691a2d25 |
1576 | $matches = Array(); |
164800ad |
1577 | if (preg_match("%^(\s*)(>|/>)%s", substr($body, $pos), $matches)) { |
c828931c |
1578 | /** |
8bd0068d |
1579 | * Yep. So we did. |
1580 | */ |
c828931c |
1581 | $pos += strlen($matches{1}); |
1582 | if ($matches{2} == "/>"){ |
1583 | $tagtype = 3; |
1584 | $pos++; |
1585 | } |
1586 | return Array($tagname, $attary, $tagtype, $lt, $pos); |
1587 | } |
a3daaaf3 |
1588 | |
cca46357 |
1589 | /** |
8bd0068d |
1590 | * There are several types of attributes, with optional |
1591 | * [:space:] between members. |
1592 | * Type 1: |
1593 | * attrname[:space:]=[:space:]'CDATA' |
1594 | * Type 2: |
1595 | * attrname[:space:]=[:space:]"CDATA" |
1596 | * Type 3: |
1597 | * attr[:space:]=[:space:]CDATA |
1598 | * Type 4: |
1599 | * attrname |
1600 | * |
1601 | * We leave types 1 and 2 the same, type 3 we check for |
1602 | * '"' and convert to """ if needed, then wrap in |
1603 | * double quotes. Type 4 we convert into: |
1604 | * attrname="yes". |
1605 | */ |
3f7c623f |
1606 | $regary = sq_findnxreg($body, $pos, "[^:\w\-_]"); |
691a2d25 |
1607 | if ($regary == false){ |
1608 | /** |
8bd0068d |
1609 | * Looks like body ended before the end of tag. |
1610 | */ |
691a2d25 |
1611 | return Array(false, false, false, $lt, strlen($body)); |
cca46357 |
1612 | } |
691a2d25 |
1613 | list($pos, $attname, $match) = $regary; |
1614 | $attname = strtolower($attname); |
1615 | /** |
8bd0068d |
1616 | * We arrived at the end of attribute name. Several things possible |
1617 | * here: |
1618 | * '>' means the end of the tag and this is attribute type 4 |
1619 | * '/' if followed by '>' means the same thing as above |
1620 | * '\s' means a lot of things -- look what it's followed by. |
1621 | * anything else means the attribute is invalid. |
1622 | */ |
691a2d25 |
1623 | switch($match){ |
3d8371be |
1624 | case '/': |
691a2d25 |
1625 | /** |
8bd0068d |
1626 | * This is an xhtml-style tag with a closing / at the |
1627 | * end, like so: <img src="blah" />. Check if it's followed |
1628 | * by the closing bracket. If not, then this tag is invalid |
1629 | */ |
3d8371be |
1630 | if (substr($body, $pos, 2) == "/>"){ |
691a2d25 |
1631 | $pos++; |
3d8371be |
1632 | $tagtype = 3; |
691a2d25 |
1633 | } else { |
3d8371be |
1634 | $gt = sq_findnxstr($body, $pos, ">"); |
1635 | $retary = Array(false, false, false, $lt, $gt); |
1636 | return $retary; |
1637 | } |
1638 | case '>': |
1639 | $attary{$attname} = '"yes"'; |
1640 | return Array($tagname, $attary, $tagtype, $lt, $pos); |
1641 | break; |
1642 | default: |
1643 | /** |
8bd0068d |
1644 | * Skip whitespace and see what we arrive at. |
1645 | */ |
3d8371be |
1646 | $pos = sq_skipspace($body, $pos); |
1647 | $char = substr($body, $pos, 1); |
1648 | /** |
8bd0068d |
1649 | * Two things are valid here: |
1650 | * '=' means this is attribute type 1 2 or 3. |
1651 | * \w means this was attribute type 4. |
1652 | * anything else we ignore and re-loop. End of tag and |
1653 | * invalid stuff will be caught by our checks at the beginning |
1654 | * of the loop. |
1655 | */ |
3d8371be |
1656 | if ($char == "="){ |
1657 | $pos++; |
1658 | $pos = sq_skipspace($body, $pos); |
691a2d25 |
1659 | /** |
8bd0068d |
1660 | * Here are 3 possibilities: |
1661 | * "'" attribute type 1 |
1662 | * '"' attribute type 2 |
1663 | * everything else is the content of tag type 3 |
1664 | */ |
3d8371be |
1665 | $quot = substr($body, $pos, 1); |
1666 | if ($quot == "'"){ |
1667 | $regary = sq_findnxreg($body, $pos+1, "\'"); |
1668 | if ($regary == false){ |
1669 | return Array(false, false, false, $lt, strlen($body)); |
1670 | } |
1671 | list($pos, $attval, $match) = $regary; |
1672 | $pos++; |
1673 | $attary{$attname} = "'" . $attval . "'"; |
1674 | } else if ($quot == '"'){ |
1675 | $regary = sq_findnxreg($body, $pos+1, '\"'); |
1676 | if ($regary == false){ |
1677 | return Array(false, false, false, $lt, strlen($body)); |
1678 | } |
1679 | list($pos, $attval, $match) = $regary; |
1680 | $pos++; |
1681 | $attary{$attname} = '"' . $attval . '"'; |
1682 | } else { |
1683 | /** |
8bd0068d |
1684 | * These are hateful. Look for \s, or >. |
1685 | */ |
3d8371be |
1686 | $regary = sq_findnxreg($body, $pos, "[\s>]"); |
1687 | if ($regary == false){ |
1688 | return Array(false, false, false, $lt, strlen($body)); |
1689 | } |
1690 | list($pos, $attval, $match) = $regary; |
1691 | /** |
8bd0068d |
1692 | * If it's ">" it will be caught at the top. |
1693 | */ |
3d8371be |
1694 | $attval = preg_replace("/\"/s", """, $attval); |
1695 | $attary{$attname} = '"' . $attval . '"'; |
7e235a1a |
1696 | } |
3d8371be |
1697 | } else if (preg_match("|[\w/>]|", $char)) { |
691a2d25 |
1698 | /** |
8bd0068d |
1699 | * That was attribute type 4. |
1700 | */ |
3d8371be |
1701 | $attary{$attname} = '"yes"'; |
1702 | } else { |
1703 | /** |
8bd0068d |
1704 | * An illegal character. Find next '>' and return. |
1705 | */ |
3d8371be |
1706 | $gt = sq_findnxstr($body, $pos, ">"); |
1707 | return Array(false, false, false, $lt, $gt); |
451f74a2 |
1708 | } |
3d8371be |
1709 | break; |
691a2d25 |
1710 | } |
1711 | } |
1712 | /** |
8bd0068d |
1713 | * The fact that we got here indicates that the tag end was never |
1714 | * found. Return invalid tag indication so it gets stripped. |
1715 | */ |
691a2d25 |
1716 | return Array(false, false, false, $lt, strlen($body)); |
1717 | } |
1718 | |
1719 | /** |
0493ed11 |
1720 | * Translates entities into literal values so they can be checked. |
8bd0068d |
1721 | * |
0493ed11 |
1722 | * @param $attvalue the by-ref value to check. |
1723 | * @param $regex the regular expression to check against. |
1724 | * @param $hex whether the entites are hexadecimal. |
1725 | * @return True or False depending on whether there were matches. |
8bd0068d |
1726 | */ |
0493ed11 |
1727 | function sq_deent(&$attvalue, $regex, $hex=false){ |
b583c3e8 |
1728 | $me = 'sq_deent'; |
0493ed11 |
1729 | $ret_match = false; |
2b665f28 |
1730 | // remove comments |
1731 | //$attvalue = preg_replace("/(\/\*.*\*\/)/","",$attvalue); |
0493ed11 |
1732 | preg_match_all($regex, $attvalue, $matches); |
1733 | if (is_array($matches) && sizeof($matches[0]) > 0){ |
1734 | $repl = Array(); |
1735 | for ($i = 0; $i < sizeof($matches[0]); $i++){ |
1736 | $numval = $matches[1][$i]; |
1737 | if ($hex){ |
1738 | $numval = hexdec($numval); |
a3daaaf3 |
1739 | } |
0493ed11 |
1740 | $repl{$matches[0][$i]} = chr($numval); |
691a2d25 |
1741 | } |
0493ed11 |
1742 | $attvalue = strtr($attvalue, $repl); |
1743 | return true; |
1744 | } else { |
1745 | return false; |
691a2d25 |
1746 | } |
691a2d25 |
1747 | } |
1748 | |
1749 | /** |
8bd0068d |
1750 | * This function runs various checks against the attributes. |
1751 | * |
1752 | * @param $tagname String with the name of the tag. |
1753 | * @param $attary Array with all tag attributes. |
1754 | * @param $rm_attnames See description for sq_sanitize |
1755 | * @param $bad_attvals See description for sq_sanitize |
1756 | * @param $add_attr_to_tag See description for sq_sanitize |
1757 | * @param $message message object |
1758 | * @param $id message id |
1759 | * @return Array with modified attributes. |
1760 | */ |
da2415c1 |
1761 | function sq_fixatts($tagname, |
1762 | $attary, |
691a2d25 |
1763 | $rm_attnames, |
1764 | $bad_attvals, |
1765 | $add_attr_to_tag, |
1766 | $message, |
b3af12ef |
1767 | $id, |
3d8371be |
1768 | $mailbox |
691a2d25 |
1769 | ){ |
b583c3e8 |
1770 | $me = 'sq_fixatts'; |
691a2d25 |
1771 | while (list($attname, $attvalue) = each($attary)){ |
1772 | /** |
8bd0068d |
1773 | * See if this attribute should be removed. |
1774 | */ |
691a2d25 |
1775 | foreach ($rm_attnames as $matchtag=>$matchattrs){ |
1776 | if (preg_match($matchtag, $tagname)){ |
1777 | foreach ($matchattrs as $matchattr){ |
1778 | if (preg_match($matchattr, $attname)){ |
1779 | unset($attary{$attname}); |
1780 | continue; |
1781 | } |
451f74a2 |
1782 | } |
451f74a2 |
1783 | } |
691a2d25 |
1784 | } |
2b665f28 |
1785 | /** |
1786 | * Workaround for IE quirks |
1787 | */ |
1788 | sq_fixIE_idiocy($attvalue); |
1789 | |
691a2d25 |
1790 | /** |
8bd0068d |
1791 | * Remove any backslashes, entities, and extraneous whitespace. |
1792 | */ |
2b665f28 |
1793 | |
1794 | $oldattvalue = $attvalue; |
0493ed11 |
1795 | sq_defang($attvalue); |
2b665f28 |
1796 | if ($attname == 'style' && $attvalue !== $oldattvalue) { |
1797 | // entities are used in the attribute value. In 99% of the cases it's there as XSS |
1798 | // i.e.<div style="{ left:expʀessioɴ( alert('XSS') ) }"> |
1799 | $attvalue = "idiocy"; |
1800 | $attary{$attname} = $attvalue; |
1801 | } |
0493ed11 |
1802 | sq_unspace($attvalue); |
af861a34 |
1803 | |
691a2d25 |
1804 | /** |
8bd0068d |
1805 | * Now let's run checks on the attvalues. |
1806 | * I don't expect anyone to comprehend this. If you do, |
1807 | * get in touch with me so I can drive to where you live and |
1808 | * shake your hand personally. :) |
1809 | */ |
691a2d25 |
1810 | foreach ($bad_attvals as $matchtag=>$matchattrs){ |
1811 | if (preg_match($matchtag, $tagname)){ |
1812 | foreach ($matchattrs as $matchattr=>$valary){ |
1813 | if (preg_match($matchattr, $attname)){ |
1814 | /** |
8bd0068d |
1815 | * There are two arrays in valary. |
1816 | * First is matches. |
1817 | * Second one is replacements |
1818 | */ |
691a2d25 |
1819 | list($valmatch, $valrepl) = $valary; |
da2415c1 |
1820 | $newvalue = |
691a2d25 |
1821 | preg_replace($valmatch, $valrepl, $attvalue); |
1822 | if ($newvalue != $attvalue){ |
1823 | $attary{$attname} = $newvalue; |
567dc524 |
1824 | $attvalue = $newvalue; |
691a2d25 |
1825 | } |
1826 | } |
1827 | } |
451f74a2 |
1828 | } |
a3daaaf3 |
1829 | } |
567dc524 |
1830 | if ($attname == 'style') { |
1831 | if (preg_match('/[\0-\37\200-\377]+/',$attvalue)) { |
1832 | // 8bit and control characters in style attribute values can be used for XSS, remove them |
1833 | $attary{$attname} = '"disallowed character"'; |
1834 | } |
1835 | preg_match_all("/url\s*\((.+)\)/si",$attvalue,$aMatch); |
1836 | if (count($aMatch)) { |
1837 | foreach($aMatch[1] as $sMatch) { |
1838 | // url value |
1839 | $urlvalue = $sMatch; |
1840 | sq_fix_url($attname, $urlvalue, $message, $id, $mailbox,"'"); |
1841 | $attary{$attname} = str_replace($sMatch,$urlvalue,$attvalue); |
1842 | } |
1843 | } |
691a2d25 |
1844 | } |
ff940ebc |
1845 | /** |
567dc524 |
1846 | * Use white list based filtering on attributes which can contain url's |
ff940ebc |
1847 | */ |
567dc524 |
1848 | else if ($attname == 'href' || $attname == 'src' || $attname == 'background') { |
1849 | sq_fix_url($attname, $attvalue, $message, $id, $mailbox); |
1850 | $attary{$attname} = $attvalue; |
ff940ebc |
1851 | } |
a3daaaf3 |
1852 | } |
691a2d25 |
1853 | /** |
8bd0068d |
1854 | * See if we need to append any attributes to this tag. |
1855 | */ |
691a2d25 |
1856 | foreach ($add_attr_to_tag as $matchtag=>$addattary){ |
1857 | if (preg_match($matchtag, $tagname)){ |
1858 | $attary = array_merge($attary, $addattary); |
1859 | } |
1860 | } |
1861 | return $attary; |
451f74a2 |
1862 | } |
a3daaaf3 |
1863 | |
567dc524 |
1864 | /** |
1865 | * This function filters url's |
1866 | * |
1867 | * @param $attvalue String with attribute value to filter |
1868 | * @param $message message object |
1869 | * @param $id message id |
1870 | * @param $mailbox mailbox |
1871 | * @param $sQuote quoting characters around url's |
1872 | */ |
1873 | function sq_fix_url($attname, &$attvalue, $message, $id, $mailbox,$sQuote = '"') { |
1874 | $attvalue = trim($attvalue); |
1875 | if ($attvalue && ($attvalue[0] =='"'|| $attvalue[0] == "'")) { |
1876 | // remove the double quotes |
1877 | $sQuote = $attvalue[0]; |
1878 | $attvalue = trim(substr($attvalue,1,-1)); |
1879 | } |
1880 | |
d31f73f1 |
1881 | // If there's no "view_unsafe_images" variable in the URL, turn unsafe |
1882 | // images off by default. |
afbf184c |
1883 | sqgetGlobalVar('view_unsafe_images', $view_unsafe_images, SQ_GET, FALSE); |
d31f73f1 |
1884 | |
567dc524 |
1885 | $secremoveimg = '../images/' . _("sec_remove_eng.png"); |
1886 | |
1887 | /** |
1888 | * Replace empty src tags with the blank image. src is only used |
1889 | * for frames, images, and image inputs. Doing a replace should |
1890 | * not affect them working as should be, however it will stop |
1891 | * IE from being kicked off when src for img tags are not set |
1892 | */ |
1893 | if ($attvalue == '') { |
1894 | $attvalue = '"' . SM_PATH . 'images/blank.png"'; |
1895 | } else { |
1896 | // first, disallow 8 bit characters and control characters |
1897 | if (preg_match('/[\0-\37\200-\377]+/',$attvalue)) { |
1898 | switch ($attname) { |
1899 | case 'href': |
1900 | $attvalue = $sQuote . 'http://invalid-stuff-detected.example.com' . $sQuote; |
1901 | break; |
1902 | default: |
1903 | $attvalue = $sQuote . SM_PATH . 'images/blank.png'. $sQuote; |
1904 | break; |
1905 | } |
1906 | } else { |
1907 | $aUrl = parse_url($attvalue); |
1908 | if (isset($aUrl['scheme'])) { |
1909 | switch(strtolower($aUrl['scheme'])) { |
d75e755b |
1910 | case 'mailto': |
567dc524 |
1911 | case 'http': |
1912 | case 'https': |
1913 | case 'ftp': |
1914 | if ($attname != 'href') { |
1915 | if ($view_unsafe_images == false) { |
1916 | $attvalue = $sQuote . $secremoveimg . $sQuote; |
1917 | } else { |
1918 | if (isset($aUrl['path'])) { |
8bbbc757 |
1919 | |
1920 | // No one has been able to show that image URIs |
1921 | // can be exploited, so for now, no restrictions |
1922 | // are made at all. If this proves to be a problem, |
1923 | // the commented-out code below can be of help. |
1924 | // (One consideration is that I see nothing in this |
1925 | // function that specifically says that we will |
1926 | // only ever arrive here when inspecting an image |
1927 | // tag, although that does seem to be the end |
1928 | // result - e.g., <script src="..."> where malicious |
1929 | // image URIs are in fact a problem are already |
1930 | // filtered out elsewhere. |
1931 | /* --------------------------------- |
567dc524 |
1932 | // validate image extension. |
1933 | $ext = strtolower(substr($aUrl['path'],strrpos($aUrl['path'],'.'))); |
1934 | if (!in_array($ext,array('.jpeg','.jpg','xjpeg','.gif','.bmp','.jpe','.png','.xbm'))) { |
8bbbc757 |
1935 | // If URI is to something other than |
1936 | // a regular image file, get the contents |
1937 | // and try to see if it is an image. |
1938 | // Don't use Fileinfo (finfo_file()) because |
1939 | // we'd need to make the admin configure the |
1940 | // location of the magic.mime file (FIXME: add finfo_file() support later?) |
1941 | // |
1942 | $mime_type = ''; |
1943 | if (function_exists('mime_content_type') |
1944 | && ($FILE = @fopen($attvalue, 'rb', FALSE))) { |
1945 | |
1946 | // fetch file |
1947 | // |
1948 | $file_contents = ''; |
1949 | while (!feof($FILE)) { |
1950 | $file_contents .= fread($FILE, 8192); |
1951 | } |
1952 | fclose($FILE); |
1953 | |
1954 | // store file locally |
1955 | // |
1956 | global $attachment_dir, $username; |
1957 | $hashed_attachment_dir = getHashedDir($username, $attachment_dir); |
1958 | $localfilename = GenerateRandomString(32, '', 7); |
1959 | $full_localfilename = "$hashed_attachment_dir/$localfilename"; |
1960 | while (file_exists($full_localfilename)) { |
1961 | $localfilename = GenerateRandomString(32, '', 7); |
1962 | $full_localfilename = "$hashed_attachment_dir/$localfilename"; |
1963 | } |
1964 | $FILE = fopen("$hashed_attachment_dir/$localfilename", 'wb'); |
1965 | fwrite($FILE, $file_contents); |
1966 | fclose($FILE); |
1967 | |
1968 | // get mime type and remove file |
1969 | // |
1970 | $mime_type = mime_content_type("$hashed_attachment_dir/$localfilename"); |
1971 | unlink("$hashed_attachment_dir/$localfilename"); |
1972 | } |
1973 | // debug: echo "$attvalue FILE TYPE IS $mime_type<HR>"; |
1974 | if (substr(strtolower($mime_type), 0, 5) != 'image') { |
1975 | $attvalue = $sQuote . SM_PATH . 'images/blank.png'. $sQuote; |
1976 | } |
567dc524 |
1977 | } |
8bbbc757 |
1978 | --------------------------------- */ |
567dc524 |
1979 | } else { |
1980 | $attvalue = $sQuote . SM_PATH . 'images/blank.png'. $sQuote; |
1981 | } |
1982 | } |
cf088f55 |
1983 | } else { |
1984 | $attvalue = $sQuote . $attvalue . $sQuote; |
567dc524 |
1985 | } |
1986 | break; |
1987 | case 'outbind': |
1988 | /** |
1989 | * "Hack" fix for Outlook using propriatary outbind:// protocol in img tags. |
1990 | * One day MS might actually make it match something useful, for now, falling |
1991 | * back to using cid2http, so we can grab the blank.png. |
1992 | */ |
cf088f55 |
1993 | $attvalue = $sQuote . sq_cid2http($message, $id, $attvalue, $mailbox) . $sQuote; |
567dc524 |
1994 | break; |
1995 | case 'cid': |
1996 | /** |
1997 | * Turn cid: urls into http-friendly ones. |
1998 | */ |
cf088f55 |
1999 | $attvalue = $sQuote . sq_cid2http($message, $id, $attvalue, $mailbox) . $sQuote; |
567dc524 |
2000 | break; |
2001 | default: |
2002 | $attvalue = $sQuote . SM_PATH . 'images/blank.png' . $sQuote; |
2003 | break; |
2004 | } |
2005 | } else { |
2006 | if (!(isset($aUrl['path']) && $aUrl['path'] == $secremoveimg)) { |
2007 | // parse_url did not lead to satisfying result |
2008 | $attvalue = $sQuote . SM_PATH . 'images/blank.png' . $sQuote; |
2009 | } |
2010 | } |
2011 | } |
2012 | } |
2013 | } |
2014 | |
691a2d25 |
2015 | /** |
8bd0068d |
2016 | * This function edits the style definition to make them friendly and |
2017 | * usable in SquirrelMail. |
2018 | * |
2019 | * @param $message the message object |
2020 | * @param $id the message id |
2021 | * @param $content a string with whatever is between <style> and </style> |
2022 | * @param $mailbox the message mailbox |
2023 | * @return a string with edited content. |
2024 | */ |
e60a299a |
2025 | function sq_fixstyle($body, $pos, $message, $id, $mailbox){ |
b583c3e8 |
2026 | $me = 'sq_fixstyle'; |
7e2ff844 |
2027 | // workaround for </style> in between comments |
2028 | $iCurrentPos = $pos; |
2029 | $content = ''; |
2030 | $sToken = ''; |
2031 | $bSucces = false; |
2032 | $bEndTag = false; |
2033 | for ($i=$pos,$iCount=strlen($body);$i<$iCount;++$i) { |
2034 | $char = $body{$i}; |
2035 | switch ($char) { |
2036 | case '<': |
10c0caeb |
2037 | $sToken = $char; |
7e2ff844 |
2038 | break; |
2039 | case '/': |
2040 | if ($sToken == '<') { |
2041 | $sToken .= $char; |
2042 | $bEndTag = true; |
2043 | } else { |
2044 | $content .= $char; |
2045 | } |
2046 | break; |
2047 | case '>': |
2048 | if ($bEndTag) { |
2049 | $sToken .= $char; |
2050 | if (preg_match('/\<\/\s*style\s*\>/i',$sToken,$aMatch)) { |
2051 | $newpos = $i + 1; |
2052 | $bSucces = true; |
2053 | break 2; |
2054 | } else { |
2055 | $content .= $sToken; |
2056 | } |
2057 | $bEndTag = false; |
2058 | } else { |
2059 | $content .= $char; |
2060 | } |
2061 | break; |
2062 | case '!': |
2063 | if ($sToken == '<') { |
2064 | // possible comment |
2065 | if (isset($body{$i+2}) && substr($body,$i,3) == '!--') { |
2066 | $i = strpos($body,'-->',$i+3); |
2b665f28 |
2067 | if ($i === false) { // no end comment |
2068 | $i = strlen($body); |
2069 | } |
7e2ff844 |
2070 | $sToken = ''; |
2071 | } |
2072 | } else { |
2073 | $content .= $char; |
2074 | } |
2075 | break; |
2076 | default: |
2077 | if ($bEndTag) { |
2078 | $sToken .= $char; |
2079 | } else { |
2080 | $content .= $char; |
2081 | } |
2082 | break; |
2083 | } |
2084 | } |
2085 | if ($bSucces == FALSE){ |
7d06541f |
2086 | return array(FALSE, strlen($body)); |
2087 | } |
7e2ff844 |
2088 | |
2b665f28 |
2089 | |
2090 | |
691a2d25 |
2091 | /** |
9ebace19 |
2092 | * First look for general BODY style declaration, which would be |
2093 | * like so: |
2094 | * body {background: blah-blah} |
2095 | * and change it to .bodyclass so we can just assign it to a <div> |
2096 | */ |
691a2d25 |
2097 | $content = preg_replace("|body(\s*\{.*?\})|si", ".bodyclass\\1", $content); |
3d8371be |
2098 | $secremoveimg = '../images/' . _("sec_remove_eng.png"); |
691a2d25 |
2099 | /** |
0493ed11 |
2100 | * Fix url('blah') declarations. |
2101 | */ |
2102 | // $content = preg_replace("|url\s*\(\s*([\'\"])\s*\S+script\s*:.*?([\'\"])\s*\)|si", |
2103 | // "url(\\1$secremoveimg\\2)", $content); |
2b665f28 |
2104 | |
567dc524 |
2105 | // first check for 8bit sequences and disallowed control characters |
2106 | if (preg_match('/[\16-\37\200-\377]+/',$content)) { |
2107 | $content = '<!-- style block removed by html filter due to presence of 8bit characters -->'; |
2108 | return array($content, $newpos); |
2109 | } |
2110 | |
2b665f28 |
2111 | // IE Sucks hard. We have a special function for it. |
2112 | sq_fixIE_idiocy($content); |
2113 | |
2114 | // remove @import line |
2115 | $content = preg_replace("/^\s*(@import.*)$/mi","\n<!-- @import rules forbidden -->\n",$content); |
2116 | |
5b4884be |
2117 | // translate ur\l and variations (IE parses that) |
2b665f28 |
2118 | // TODO check if the sq_fixIE_idiocy function already handles this. |
5b4884be |
2119 | $content = preg_replace("/(\\\\)?u(\\\\)?r(\\\\)?l(\\\\)?/i", 'url', $content); |
567dc524 |
2120 | preg_match_all("/url\s*\((.+)\)/si",$content,$aMatch); |
2121 | if (count($aMatch)) { |
2122 | $aValue = $aReplace = array(); |
2123 | foreach($aMatch[1] as $sMatch) { |
2124 | // url value |
2125 | $urlvalue = $sMatch; |
2126 | sq_fix_url('style',$urlvalue, $message, $id, $mailbox,"'"); |
2127 | $aValue[] = $sMatch; |
2128 | $aReplace[] = $urlvalue; |
0493ed11 |
2129 | } |
567dc524 |
2130 | $content = str_replace($aValue,$aReplace,$content); |
691a2d25 |
2131 | } |
567dc524 |
2132 | |
9ebace19 |
2133 | /** |
2134 | * Remove any backslashes, entities, and extraneous whitespace. |
2135 | */ |
0493ed11 |
2136 | $contentTemp = $content; |
2137 | sq_defang($contentTemp); |
2138 | sq_unspace($contentTemp); |
a3daaaf3 |
2139 | |
691a2d25 |
2140 | /** |
8bd0068d |
2141 | * Fix stupid css declarations which lead to vulnerabilities |
2142 | * in IE. |
2143 | */ |
5db90261 |
2144 | $match = Array('/\/\*.*\*\//', |
2145 | '/expression/i', |
0493ed11 |
2146 | '/behaviou*r/i', |
2147 | '/binding/i', |
2b665f28 |
2148 | '/include-source/i', |
2149 | '/javascript/i', |
2150 | '/script/i'); |
2151 | $replace = Array('','idiocy', 'idiocy', 'idiocy', 'idiocy', 'idiocy', 'idiocy'); |
0493ed11 |
2152 | $contentNew = preg_replace($match, $replace, $contentTemp); |
2153 | if ($contentNew !== $contentTemp) { |
2154 | // insecure css declarations are used. From now on we don't care |
2155 | // anymore if the css is destroyed by sq_deent, sq_unspace or sq_unbackslash |
2156 | $content = $contentNew; |
2157 | } |
7d06541f |
2158 | return array($content, $newpos); |
691a2d25 |
2159 | } |
a3daaaf3 |
2160 | |
0493ed11 |
2161 | |
691a2d25 |
2162 | /** |
8bd0068d |
2163 | * This function converts cid: url's into the ones that can be viewed in |
2164 | * the browser. |
2165 | * |
2166 | * @param $message the message object |
2167 | * @param $id the message id |
2168 | * @param $cidurl the cid: url. |
2169 | * @param $mailbox the message mailbox |
2170 | * @return a string with a http-friendly url |
2171 | */ |
b3af12ef |
2172 | function sq_cid2http($message, $id, $cidurl, $mailbox){ |
691a2d25 |
2173 | /** |
8bd0068d |
2174 | * Get rid of quotes. |
2175 | */ |
691a2d25 |
2176 | $quotchar = substr($cidurl, 0, 1); |
2dd879b8 |
2177 | if ($quotchar == '"' || $quotchar == "'"){ |
2178 | $cidurl = str_replace($quotchar, "", $cidurl); |
2179 | } else { |
2180 | $quotchar = ''; |
2181 | } |
691a2d25 |
2182 | $cidurl = substr(trim($cidurl), 4); |
0493ed11 |
2183 | |
2184 | $match_str = '/\{.*?\}\//'; |
2185 | $str_rep = ''; |
2186 | $cidurl = preg_replace($match_str, $str_rep, $cidurl); |
2187 | |
e5e9381a |
2188 | $linkurl = find_ent_id($cidurl, $message); |
9ebace19 |
2189 | /* in case of non-safe cid links $httpurl should be replaced by a sort of |
2190 | unsafe link image */ |
e5e9381a |
2191 | $httpurl = ''; |
c8f5f606 |
2192 | |
8bd0068d |
2193 | /** |
2194 | * This is part of a fix for Outlook Express 6.x generating |
2195 | * cid URLs without creating content-id headers. These images are |
2196 | * not part of the multipart/related html mail. The html contains |
2197 | * <img src="cid:{some_id}/image_filename.ext"> references to |
2198 | * attached images with as goal to render them inline although |
2199 | * the attachment disposition property is not inline. |
2200 | */ |
c8f5f606 |
2201 | |
2202 | if (empty($linkurl)) { |
2203 | if (preg_match('/{.*}\//', $cidurl)) { |
2204 | $cidurl = preg_replace('/{.*}\//','', $cidurl); |
2205 | if (!empty($cidurl)) { |
2206 | $linkurl = find_ent_id($cidurl, $message); |
2207 | } |
2208 | } |
2209 | } |
f8a1ed5a |
2210 | |
c8f5f606 |
2211 | if (!empty($linkurl)) { |
fa26ab45 |
2212 | $httpurl = $quotchar . sqm_baseuri() . 'src/download.php?absolute_dl=true&' . |
8bd0068d |
2213 | "passed_id=$id&mailbox=" . urlencode($mailbox) . |
2214 | '&ent_id=' . $linkurl . $quotchar; |
c8f5f606 |
2215 | } else { |
2216 | /** |
2217 | * If we couldn't generate a proper img url, drop in a blank image |
2218 | * instead of sending back empty, otherwise it causes unusual behaviour |
2219 | */ |
bc017c1d |
2220 | $httpurl = $quotchar . SM_PATH . 'images/blank.png' . $quotchar; |
e5e9381a |
2221 | } |
f8a1ed5a |
2222 | |
691a2d25 |
2223 | return $httpurl; |
2224 | } |
2225 | |
2226 | /** |
8bd0068d |
2227 | * This function changes the <body> tag into a <div> tag since we |
2228 | * can't really have a body-within-body. |
2229 | * |
2230 | * @param $attary an array of attributes and values of <body> |
2231 | * @param $mailbox mailbox we're currently reading (for cid2http) |
2232 | * @param $message current message (for cid2http) |
2233 | * @param $id current message id (for cid2http) |
2234 | * @return a modified array of attributes to be set for <div> |
2235 | */ |
2dd879b8 |
2236 | function sq_body2div($attary, $mailbox, $message, $id){ |
b583c3e8 |
2237 | $me = 'sq_body2div'; |
3d8371be |
2238 | $divattary = Array('class' => "'bodyclass'"); |
b583c3e8 |
2239 | $text = '#000000'; |
c189a963 |
2240 | $has_bgc_stl = $has_txt_stl = false; |
b583c3e8 |
2241 | $styledef = ''; |
691a2d25 |
2242 | if (is_array($attary) && sizeof($attary) > 0){ |
2243 | foreach ($attary as $attname=>$attvalue){ |
2244 | $quotchar = substr($attvalue, 0, 1); |
2245 | $attvalue = str_replace($quotchar, "", $attvalue); |
2246 | switch ($attname){ |
3d8371be |
2247 | case 'background': |
8bd0068d |
2248 | $attvalue = sq_cid2http($message, $id, $attvalue, $mailbox); |
3d8371be |
2249 | $styledef .= "background-image: url('$attvalue'); "; |
2250 | break; |
2251 | case 'bgcolor': |
c189a963 |
2252 | $has_bgc_stl = true; |
3d8371be |
2253 | $styledef .= "background-color: $attvalue; "; |
2254 | break; |
2255 | case 'text': |
c189a963 |
2256 | $has_txt_stl = true; |
3d8371be |
2257 | $styledef .= "color: $attvalue; "; |
2258 | break; |
691a2d25 |
2259 | } |
a3daaaf3 |
2260 | } |
c189a963 |
2261 | // Outlook defines a white bgcolor and no text color. This can lead to |
2262 | // white text on a white bg with certain themes. |
2263 | if ($has_bgc_stl && !$has_txt_stl) { |
2264 | $styledef .= "color: $text; "; |
2265 | } |
691a2d25 |
2266 | if (strlen($styledef) > 0){ |
2267 | $divattary{"style"} = "\"$styledef\""; |
2268 | } |
2269 | } |
2270 | return $divattary; |
2271 | } |
a3daaaf3 |
2272 | |
691a2d25 |
2273 | /** |
8bd0068d |
2274 | * This is the main function and the one you should actually be calling. |
2275 | * There are several variables you should be aware of an which need |
2276 | * special description. |
2277 | * |
2278 | * Since the description is quite lengthy, see it here: |
2279 | * http://linux.duke.edu/projects/mini/htmlfilter/ |
2280 | * |
2281 | * @param $body the string with HTML you wish to filter |
2282 | * @param $tag_list see description above |
2283 | * @param $rm_tags_with_content see description above |
2284 | * @param $self_closing_tags see description above |
2285 | * @param $force_tag_closing see description above |
2286 | * @param $rm_attnames see description above |
2287 | * @param $bad_attvals see description above |
2288 | * @param $add_attr_to_tag see description above |
2289 | * @param $message message object |
2290 | * @param $id message id |
2291 | * @return sanitized html safe to show on your pages. |
2292 | */ |
da2415c1 |
2293 | function sq_sanitize($body, |
8bd0068d |
2294 | $tag_list, |
2295 | $rm_tags_with_content, |
2296 | $self_closing_tags, |
2297 | $force_tag_closing, |
2298 | $rm_attnames, |
2299 | $bad_attvals, |
2300 | $add_attr_to_tag, |
2301 | $message, |
2302 | $id, |
2303 | $mailbox |
2304 | ){ |
b583c3e8 |
2305 | $me = 'sq_sanitize'; |
7d06541f |
2306 | $rm_tags = array_shift($tag_list); |
691a2d25 |
2307 | /** |
8bd0068d |
2308 | * Normalize rm_tags and rm_tags_with_content. |
2309 | */ |
7d06541f |
2310 | @array_walk($tag_list, 'sq_casenormalize'); |
691a2d25 |
2311 | @array_walk($rm_tags_with_content, 'sq_casenormalize'); |
2312 | @array_walk($self_closing_tags, 'sq_casenormalize'); |
2313 | /** |
8bd0068d |
2314 | * See if tag_list is of tags to remove or tags to allow. |
2315 | * false means remove these tags |
2316 | * true means allow these tags |
2317 | */ |
691a2d25 |
2318 | $curpos = 0; |
2319 | $open_tags = Array(); |
2dd879b8 |
2320 | $trusted = "\n<!-- begin sanitized html -->\n"; |
691a2d25 |
2321 | $skip_content = false; |
bb8d0799 |
2322 | /** |
8bd0068d |
2323 | * Take care of netscape's stupid javascript entities like |
2324 | * &{alert('boo')}; |
2325 | */ |
bb8d0799 |
2326 | $body = preg_replace("/&(\{.*?\};)/si", "&\\1", $body); |
691a2d25 |
2327 | |
7d06541f |
2328 | while (($curtag = sq_getnxtag($body, $curpos)) != FALSE){ |
691a2d25 |
2329 | list($tagname, $attary, $tagtype, $lt, $gt) = $curtag; |
2330 | $free_content = substr($body, $curpos, $lt-$curpos); |
2331 | /** |
8bd0068d |
2332 | * Take care of <style> |
2333 | */ |
7d06541f |
2334 | if ($tagname == "style" && $tagtype == 1){ |
da2415c1 |
2335 | list($free_content, $curpos) = |
e60a299a |
2336 | sq_fixstyle($body, $gt+1, $message, $id, $mailbox); |
7d06541f |
2337 | if ($free_content != FALSE){ |
2338 | $trusted .= sq_tagprint($tagname, $attary, $tagtype); |
2339 | $trusted .= $free_content; |
2340 | $trusted .= sq_tagprint($tagname, false, 2); |
2341 | } |
2342 | continue; |
691a2d25 |
2343 | } |
2344 | if ($skip_content == false){ |
2345 | $trusted .= $free_content; |
691a2d25 |
2346 | } |
2347 | if ($tagname != FALSE){ |
2348 | if ($tagtype == 2){ |
2349 | if ($skip_content == $tagname){ |
2350 | /** |
8bd0068d |
2351 | * Got to the end of tag we needed to remove. |
2352 | */ |
691a2d25 |
2353 | $tagname = false; |
2354 | $skip_content = false; |
2355 | } else { |
2356 | if ($skip_content == false){ |
c828931c |
2357 | if ($tagname == "body"){ |
2358 | $tagname = "div"; |
2dd879b8 |
2359 | } |
da2415c1 |
2360 | if (isset($open_tags{$tagname}) && |
8bd0068d |
2361 | $open_tags{$tagname} > 0){ |
2dd879b8 |
2362 | $open_tags{$tagname}--; |
691a2d25 |
2363 | } else { |
2dd879b8 |
2364 | $tagname = false; |
691a2d25 |
2365 | } |
691a2d25 |
2366 | } |
2367 | } |
2368 | } else { |
2369 | /** |
8bd0068d |
2370 | * $rm_tags_with_content |
2371 | */ |
691a2d25 |
2372 | if ($skip_content == false){ |
2373 | /** |
8bd0068d |
2374 | * See if this is a self-closing type and change |
2375 | * tagtype appropriately. |
2376 | */ |
691a2d25 |
2377 | if ($tagtype == 1 |
8bd0068d |
2378 | && in_array($tagname, $self_closing_tags)){ |
2dd879b8 |
2379 | $tagtype = 3; |
691a2d25 |
2380 | } |
2381 | /** |
8bd0068d |
2382 | * See if we should skip this tag and any content |
2383 | * inside it. |
2384 | */ |
691a2d25 |
2385 | if ($tagtype == 1 && |
8bd0068d |
2386 | in_array($tagname, $rm_tags_with_content)){ |
691a2d25 |
2387 | $skip_content = $tagname; |
2388 | } else { |
da2415c1 |
2389 | if (($rm_tags == false |
8bd0068d |
2390 | && in_array($tagname, $tag_list)) || |
2391 | ($rm_tags == true && |
2392 | !in_array($tagname, $tag_list))){ |
691a2d25 |
2393 | $tagname = false; |
2394 | } else { |
2dd879b8 |
2395 | /** |
8bd0068d |
2396 | * Convert body into div. |
2397 | */ |
2dd879b8 |
2398 | if ($tagname == "body"){ |
2399 | $tagname = "div"; |
da2415c1 |
2400 | $attary = sq_body2div($attary, $mailbox, |
8bd0068d |
2401 | $message, $id); |
2dd879b8 |
2402 | } |
691a2d25 |
2403 | if ($tagtype == 1){ |
2404 | if (isset($open_tags{$tagname})){ |
2405 | $open_tags{$tagname}++; |
2406 | } else { |
2407 | $open_tags{$tagname}=1; |
2408 | } |
2409 | } |
2410 | /** |
8bd0068d |
2411 | * This is where we run other checks. |
2412 | */ |
691a2d25 |
2413 | if (is_array($attary) && sizeof($attary) > 0){ |
2414 | $attary = sq_fixatts($tagname, |
8bd0068d |
2415 | $attary, |
2416 | $rm_attnames, |
2417 | $bad_attvals, |
2418 | $add_attr_to_tag, |
2419 | $message, |
2420 | $id, |
2421 | $mailbox |
2422 | ); |
691a2d25 |
2423 | } |
2424 | } |
2425 | } |
691a2d25 |
2426 | } |
2427 | } |
2428 | if ($tagname != false && $skip_content == false){ |
2429 | $trusted .= sq_tagprint($tagname, $attary, $tagtype); |
2430 | } |
691a2d25 |
2431 | } |
2432 | $curpos = $gt+1; |
a3daaaf3 |
2433 | } |
691a2d25 |
2434 | $trusted .= substr($body, $curpos, strlen($body)-$curpos); |
2435 | if ($force_tag_closing == true){ |
2436 | foreach ($open_tags as $tagname=>$opentimes){ |
2437 | while ($opentimes > 0){ |
2438 | $trusted .= '</' . $tagname . '>'; |
2439 | $opentimes--; |
2440 | } |
2441 | } |
2442 | $trusted .= "\n"; |
2443 | } |
2444 | $trusted .= "<!-- end sanitized html -->\n"; |
2445 | return $trusted; |
2446 | } |
451f74a2 |
2447 | |
691a2d25 |
2448 | /** |
8bd0068d |
2449 | * This is a wrapper function to call html sanitizing routines. |
2450 | * |
2451 | * @param $body the body of the message |
2452 | * @param $id the id of the message |
c189a963 |
2453 | |
2454 | * @param $message |
2455 | * @param $mailbox |
2456 | * @param boolean $take_mailto_links When TRUE, converts mailto: links |
2457 | * into internal SM compose links |
2458 | * (optional; default = TRUE) |
8bd0068d |
2459 | * @return a string with html safe to display in the browser. |
2460 | */ |
c189a963 |
2461 | function magicHTML($body, $id, $message, $mailbox = 'INBOX', $take_mailto_links =true) { |
2462 | |
202bcbcc |
2463 | // require_once(SM_PATH . 'functions/url_parser.php'); // for $MailTo_PReg_Match |
c189a963 |
2464 | |
691a2d25 |
2465 | global $attachment_common_show_images, $view_unsafe_images, |
8bd0068d |
2466 | $has_unsafe_images; |
691a2d25 |
2467 | /** |
8bd0068d |
2468 | * Don't display attached images in HTML mode. |
2b665f28 |
2469 | * |
d0187bd6 |
2470 | * SB: why? |
8bd0068d |
2471 | */ |
691a2d25 |
2472 | $attachment_common_show_images = false; |
2473 | $tag_list = Array( |
8bd0068d |
2474 | false, |
2475 | "object", |
2476 | "meta", |
2477 | "html", |
2478 | "head", |
2479 | "base", |
2480 | "link", |
2481 | "frame", |
2482 | "iframe", |
2483 | "plaintext", |
2484 | "marquee" |
2485 | ); |
691a2d25 |
2486 | |
2487 | $rm_tags_with_content = Array( |
8bd0068d |
2488 | "script", |
2489 | "applet", |
2490 | "embed", |
2491 | "title", |
2492 | "frameset", |
0493ed11 |
2493 | "xmp", |
8bd0068d |
2494 | "xml" |
2495 | ); |
691a2d25 |
2496 | |
2497 | $self_closing_tags = Array( |
8bd0068d |
2498 | "img", |
2499 | "br", |
2500 | "hr", |
2501 | "input", |
2502 | "outbind" |
2503 | ); |
691a2d25 |
2504 | |
2dd879b8 |
2505 | $force_tag_closing = true; |
691a2d25 |
2506 | |
2507 | $rm_attnames = Array( |
8bd0068d |
2508 | "/.*/" => |
2509 | Array( |
2510 | "/target/i", |
2511 | "/^on.*/i", |
2512 | "/^dynsrc/i", |
2513 | "/^data.*/i", |
2514 | "/^lowsrc.*/i" |
2515 | ) |
2516 | ); |
691a2d25 |
2517 | |
2518 | $secremoveimg = "../images/" . _("sec_remove_eng.png"); |
2519 | $bad_attvals = Array( |
8bd0068d |
2520 | "/.*/" => |
691a2d25 |
2521 | Array( |
0a6ec9b5 |
2522 | "/^src|background/i" => |
8bd0068d |
2523 | Array( |
691a2d25 |
2524 | Array( |
8bd0068d |
2525 | "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si", |
2526 | "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si", |
2527 | "/^([\'\"])\s*about\s*:.*([\'\"])/si" |
691a2d25 |
2528 | ), |
8bd0068d |
2529 | Array( |
2530 | "\\1$secremoveimg\\2", |
2531 | "\\1$secremoveimg\\2", |
2532 | "\\1$secremoveimg\\2", |
8bd0068d |
2533 | ) |
2534 | ), |
0a6ec9b5 |
2535 | "/^href|action/i" => |
8bd0068d |
2536 | Array( |
0a6ec9b5 |
2537 | Array( |
8bd0068d |
2538 | "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si", |
2539 | "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si", |
2540 | "/^([\'\"])\s*about\s*:.*([\'\"])/si" |
0a6ec9b5 |
2541 | ), |
691a2d25 |
2542 | Array( |
8bd0068d |
2543 | "\\1#\\1", |
2544 | "\\1#\\1", |
2545 | "\\1#\\1" |
02474e43 |
2546 | ) |
8bd0068d |
2547 | ), |
2548 | "/^style/i" => |
2549 | Array( |
2550 | Array( |
5db90261 |
2551 | "/\/\*.*\*\//", |
8bd0068d |
2552 | "/expression/i", |
2553 | "/binding/i", |
2554 | "/behaviou*r/i", |
2555 | "/include-source/i", |
2556 | "/position\s*:\s*absolute/i", |
1d935bc2 |
2557 | "/(\\\\)?u(\\\\)?r(\\\\)?l(\\\\)?/i", |
8bd0068d |
2558 | "/url\s*\(\s*([\'\"])\s*\S+script\s*:.*([\'\"])\s*\)/si", |
2559 | "/url\s*\(\s*([\'\"])\s*mocha\s*:.*([\'\"])\s*\)/si", |
2560 | "/url\s*\(\s*([\'\"])\s*about\s*:.*([\'\"])\s*\)/si", |
2561 | "/(.*)\s*:\s*url\s*\(\s*([\'\"]*)\s*\S+script\s*:.*([\'\"]*)\s*\)/si" |
2562 | ), |
2563 | Array( |
5db90261 |
2564 | "", |
8bd0068d |
2565 | "idiocy", |
2566 | "idiocy", |
2567 | "idiocy", |
2568 | "idiocy", |
567dc524 |
2569 | "idiocy", |
5b4884be |
2570 | "url", |
8bd0068d |
2571 | "url(\\1#\\1)", |
2572 | "url(\\1#\\1)", |
2573 | "url(\\1#\\1)", |
8bd0068d |
2574 | "\\1:url(\\2#\\3)" |
2575 | ) |
691a2d25 |
2576 | ) |
8bd0068d |
2577 | ) |
691a2d25 |
2578 | ); |
9ebace19 |
2579 | |
d31f73f1 |
2580 | // If there's no "view_unsafe_images" variable in the URL, turn unsafe |
2581 | // images off by default. |
afbf184c |
2582 | sqgetGlobalVar('view_unsafe_images', $view_unsafe_images, SQ_GET, FALSE); |
9ebace19 |
2583 | |
691a2d25 |
2584 | if (!$view_unsafe_images){ |
2585 | /** |
8bd0068d |
2586 | * Remove any references to http/https if view_unsafe_images set |
2587 | * to false. |
2588 | */ |
02474e43 |
2589 | array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[0], |
8bd0068d |
2590 | '/^([\'\"])\s*https*:.*([\'\"])/si'); |
02474e43 |
2591 | array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[1], |
8bd0068d |
2592 | "\\1$secremoveimg\\1"); |
02474e43 |
2593 | array_push($bad_attvals{'/.*/'}{'/^style/i'}[0], |
7ef0b415 |
2594 | '/url\([\'\"]?https?:[^\)]*[\'\"]?\)/si'); |
02474e43 |
2595 | array_push($bad_attvals{'/.*/'}{'/^style/i'}[1], |
8bd0068d |
2596 | "url(\\1$secremoveimg\\1)"); |
691a2d25 |
2597 | } |
451f74a2 |
2598 | |
691a2d25 |
2599 | $add_attr_to_tag = Array( |
8bd0068d |
2600 | "/^a$/i" => |
c25f2fbb |
2601 | Array('target'=>'"_blank"', |
02474e43 |
2602 | 'title'=>'"'._("This external link will open in a new window").'"' |
8bd0068d |
2603 | ) |
2604 | ); |
da2415c1 |
2605 | $trusted = sq_sanitize($body, |
8bd0068d |
2606 | $tag_list, |
2607 | $rm_tags_with_content, |
2608 | $self_closing_tags, |
2609 | $force_tag_closing, |
2610 | $rm_attnames, |
2611 | $bad_attvals, |
2612 | $add_attr_to_tag, |
2613 | $message, |
2614 | $id, |
2615 | $mailbox |
2616 | ); |
567dc524 |
2617 | if (strpos($trusted,$secremoveimg)){ |
691a2d25 |
2618 | $has_unsafe_images = true; |
da2415c1 |
2619 | } |
c189a963 |
2620 | |
2621 | // we want to parse mailto's in HTML output, change to SM compose links |
2622 | // this is a modified version of code from url_parser.php... but Marc is |
2623 | // right: we need a better filtering implementation; adding this randomly |
2624 | // here is not a great solution |
2625 | // |
2626 | if ($take_mailto_links) { |
2627 | // parseUrl($trusted); // this even parses URLs inside of tags... too aggressive |
2628 | global $MailTo_PReg_Match; |
202bcbcc |
2629 | $MailTo_PReg_Match = '/mailto:' . substr($MailTo_PReg_Match, 1) ; |
c189a963 |
2630 | if ((preg_match_all($MailTo_PReg_Match, $trusted, $regs)) && ($regs[0][0] != '')) { |
2631 | foreach ($regs[0] as $i => $mailto_before) { |
2632 | $mailto_params = $regs[10][$i]; |
2633 | // get rid of any tailing quote since we have to add send_to to the end |
2634 | // |
2635 | if (substr($mailto_before, strlen($mailto_before) - 1) == '"') |
2636 | $mailto_before = substr($mailto_before, 0, strlen($mailto_before) - 1); |
2637 | if (substr($mailto_params, strlen($mailto_params) - 1) == '"') |
2638 | $mailto_params = substr($mailto_params, 0, strlen($mailto_params) - 1); |
2639 | |
2640 | if ($regs[1][$i]) { //if there is an email addr before '?', we need to merge it with the params |
2641 | $to = 'to=' . $regs[1][$i]; |
2642 | if (strpos($mailto_params, 'to=') > -1) //already a 'to=' |
2643 | $mailto_params = str_replace('to=', $to . '%2C%20', $mailto_params); |
2644 | else { |
2645 | if ($mailto_params) //already some params, append to them |
2646 | $mailto_params .= '&' . $to; |
2647 | else |
2648 | $mailto_params .= '?' . $to; |
2649 | } |
2650 | } |
2651 | |
2652 | $url_str = preg_replace(array('/to=/i', '/(?<!b)cc=/i', '/bcc=/i'), array('send_to=', 'send_to_cc=', 'send_to_bcc='), $mailto_params); |
2653 | |
2654 | // we'll already have target=_blank, no need to allow comp_in_new |
2655 | // here (which would be a lot more work anyway) |
2656 | // |
2657 | global $compose_new_win; |
2658 | $temp_comp_in_new = $compose_new_win; |
2659 | $compose_new_win = 0; |
2660 | $comp_uri = makeComposeLink('src/compose.php' . $url_str, $mailto_before); |
2661 | $compose_new_win = $temp_comp_in_new; |
2662 | |
2663 | // remove <a href=" and anything after the next quote (we only |
2664 | // need the uri, not the link HTML) in compose uri |
2665 | // |
2666 | $comp_uri = substr($comp_uri, 9); |
2667 | $comp_uri = substr($comp_uri, 0, strpos($comp_uri, '"', 1)); |
2668 | $trusted = str_replace($mailto_before, $comp_uri, $trusted); |
2669 | } |
2670 | } |
2671 | } |
2672 | |
691a2d25 |
2673 | return $trusted; |
451f74a2 |
2674 | } |
a4a70693 |
2675 | |
da2415c1 |
2676 | /** |
8bd0068d |
2677 | * function SendDownloadHeaders - send file to the browser |
2678 | * |
2679 | * Original Source: SM core src/download.php |
2680 | * moved here to make it available to other code, and separate |
2681 | * front end from back end functionality. |
2682 | * |
2683 | * @param string $type0 first half of mime type |
2684 | * @param string $type1 second half of mime type |
2685 | * @param string $filename filename to tell the browser for downloaded file |
2686 | * @param boolean $force whether to force the download dialog to pop |
2687 | * @param optional integer $filesize send the Content-Header and length to the browser |
2688 | * @return void |
2689 | */ |
02474e43 |
2690 | function SendDownloadHeaders($type0, $type1, $filename, $force, $filesize=0) { |
2691 | global $languages, $squirrelmail_language; |
cfffd60b |
2692 | $isIE = $isIE6plus = false; |
02474e43 |
2693 | |
2694 | sqgetGlobalVar('HTTP_USER_AGENT', $HTTP_USER_AGENT, SQ_SERVER); |
2695 | |
2696 | if (strstr($HTTP_USER_AGENT, 'compatible; MSIE ') !== false && |
8bd0068d |
2697 | strstr($HTTP_USER_AGENT, 'Opera') === false) { |
cfffd60b |
2698 | $isIE = true; |
02474e43 |
2699 | } |
2700 | |
cfffd60b |
2701 | if (preg_match('/compatible; MSIE ([0-9]+)/', $HTTP_USER_AGENT, $match) && |
2702 | ((int)$match[1]) >= 6 && strstr($HTTP_USER_AGENT, 'Opera') === false) { |
2703 | $isIE6plus = true; |
02474e43 |
2704 | } |
2705 | |
2706 | if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && |
8bd0068d |
2707 | function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_downloadfilename')) { |
02474e43 |
2708 | $filename = |
8bd0068d |
2709 | call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_downloadfilename', $filename, $HTTP_USER_AGENT); |
02474e43 |
2710 | } else { |
2711 | $filename = ereg_replace('[\\/:\*\?"<>\|;]', '_', str_replace(' ', ' ', $filename)); |
2712 | } |
2713 | |
2714 | // A Pox on Microsoft and it's Internet Explorer! |
2715 | // |
2716 | // IE has lots of bugs with file downloads. |
2717 | // It also has problems with SSL. Both of these cause problems |
2718 | // for us in this function. |
2719 | // |
2720 | // See this article on Cache Control headers and SSL |
2721 | // http://support.microsoft.com/default.aspx?scid=kb;en-us;323308 |
2722 | // |
2723 | // The best thing you can do for IE is to upgrade to the latest |
2724 | // version |
2725 | //set all the Cache Control Headers for IE |
2726 | if ($isIE) { |
2727 | $filename=rawurlencode($filename); |
2728 | header ("Pragma: public"); |
8bd0068d |
2729 | header ("Cache-Control: no-store, max-age=0, no-cache, must-revalidate"); // HTTP/1.1 |
02474e43 |
2730 | header ("Cache-Control: post-check=0, pre-check=0", false); |
8bd0068d |
2731 | header ("Cache-Control: private"); |
02474e43 |
2732 | |
2733 | //set the inline header for IE, we'll add the attachment header later if we need it |
2734 | header ("Content-Disposition: inline; filename=$filename"); |
2735 | } |
2736 | |
2737 | if (!$force) { |
2738 | // Try to show in browser window |
2739 | header ("Content-Disposition: inline; filename=\"$filename\""); |
2740 | header ("Content-Type: $type0/$type1; name=\"$filename\""); |
2741 | } else { |
2742 | // Try to pop up the "save as" box |
2743 | |
2744 | // IE makes this hard. It pops up 2 save boxes, or none. |
2745 | // http://support.microsoft.com/support/kb/articles/Q238/5/88.ASP |
2746 | // http://support.microsoft.com/default.aspx?scid=kb;EN-US;260519 |
2747 | // But, according to Microsoft, it is "RFC compliant but doesn't |
2748 | // take into account some deviations that allowed within the |
2749 | // specification." Doesn't that mean RFC non-compliant? |
2750 | // http://support.microsoft.com/support/kb/articles/Q258/4/52.ASP |
2751 | |
2752 | // all browsers need the application/octet-stream header for this |
2753 | header ("Content-Type: application/octet-stream; name=\"$filename\""); |
2754 | |
2755 | // http://support.microsoft.com/support/kb/articles/Q182/3/15.asp |
2756 | // Do not have quotes around filename, but that applied to |
2757 | // "attachment"... does it apply to inline too? |
2758 | header ("Content-Disposition: attachment; filename=\"$filename\""); |
2759 | |
cfffd60b |
2760 | if ($isIE && !$isIE6plus) { |
02474e43 |
2761 | // This combination seems to work mostly. IE 5.5 SP 1 has |
2762 | // known issues (see the Microsoft Knowledge Base) |
2763 | |
2764 | // This works for most types, but doesn't work with Word files |
2765 | header ("Content-Type: application/download; name=\"$filename\""); |
7e2ff844 |
2766 | header ("Content-Type: application/force-download; name=\"$filename\""); |
02474e43 |
2767 | // These are spares, just in case. :-) |
2768 | //header("Content-Type: $type0/$type1; name=\"$filename\""); |
2769 | //header("Content-Type: application/x-msdownload; name=\"$filename\""); |
2770 | //header("Content-Type: application/octet-stream; name=\"$filename\""); |
7e2ff844 |
2771 | } else if ($isIE) { |
2772 | // This is to prevent IE for MIME sniffing and auto open a file in IE |
2773 | header ("Content-Type: application/force-download; name=\"$filename\""); |
02474e43 |
2774 | } else { |
2775 | // another application/octet-stream forces download for Netscape |
2776 | header ("Content-Type: application/octet-stream; name=\"$filename\""); |
2777 | } |
2778 | } |
2779 | |
2780 | //send the content-length header if the calling function provides it |
2781 | if ($filesize > 0) { |
2782 | header("Content-Length: $filesize"); |
2783 | } |
07c49f57 |
2784 | |
8d863f64 |
2785 | } // end fn SendDownloadHeaders |