5 * Description: Provides a Facebook-like chat using Jappix Mini
7 * Author: leberwurscht <leberwurscht@hoegners.de>
12 // Copyright 2012 "Leberwurscht" <leberwurscht@hoegners.de>
14 // This file is dual-licensed under the MIT license (see MIT.txt) and the AGPL license (see jappix/COPYING).
20 * jabber password should not be stored on server
21 * jabber password should not be sent between server and browser as soon as the user is logged in
22 * jabber password should not be reconstructible from communication between server and browser as soon as the user is logged in
25 Only store an encrypted version of the jabber password on the server. The encryption key is only available to the browser
26 and not to the server (at least as soon as the user is logged in). It can be stored using the jappix setDB function.
28 This encryption key could be the friendica password, but then this password would be stored in the browser in cleartext.
29 It is better to use a hash of the password.
30 The server should not be able to reconstruct the password, so we can't take the same hash the server stores. But we can
31 use hash("some_prefix"+password). This will however not work with OpenID logins, for this type of login the password must
35 How to discover the jabber addresses of the friendica contacts?
38 Each Friendica site with this addon provides a /jappixmini/ module page. We go through our contacts and retrieve
39 this information every week using a cron hook.
42 We do not want to make the jabber address public.
45 When two friendica users connect using DFRN, the relation gets a DFRN ID and a keypair is generated.
46 Using this keypair, we can provide the jabber address only to contacts:
49 signed_address = openssl_*_encrypt(alice_jabber_address)
50 send signed_address to Bob, who does
51 trusted_address = openssl_*_decrypt(signed_address)
53 encrypted_address = openssl_*_encrypt(bob_jabber_address)
54 reply with encrypted_address to Alice, who does
55 decrypted_address = openssl_*_decrypt(encrypted_address)
56 save decrypted_address
59 GET /jappixmini/?role=%s&signed_address=%s&dfrn_id=%s
62 json({"status":"ok", "encrypted_address":"%s"})
66 function jappixmini_install() {
67 register_hook('plugin_settings', 'addon/jappixmini/jappixmini.php', 'jappixmini_settings');
68 register_hook('plugin_settings_post', 'addon/jappixmini/jappixmini.php', 'jappixmini_settings_post');
70 register_hook('page_end', 'addon/jappixmini/jappixmini.php', 'jappixmini_script');
71 register_hook('authenticate', 'addon/jappixmini/jappixmini.php', 'jappixmini_login');
73 register_hook('cron', 'addon/jappixmini/jappixmini.php', 'jappixmini_cron');
75 // Jappix source download as required by AGPL
76 register_hook('about_hook', 'addon/jappixmini/jappixmini.php', 'jappixmini_download_source');
78 // set standard configuration
79 $info_text = get_config("jappixmini", "infotext");
80 if (!$info_text) set_config("jappixmini", "infotext",
81 "To get the chat working, you need to know a BOSH host which works with your Jabber account. ".
82 "An example of a BOSH server that works for all accounts is https://bind.jappix.com/, but keep ".
83 "in mind that the BOSH server can read along all chat messages. If you know that your Jabber ".
84 "server also provides an own BOSH server, it is much better to use this one!"
87 $bosh_proxy = get_config("jappixmini", "bosh_proxy");
88 if ($bosh_proxy==="") set_config("jappixmini", "bosh_proxy", "1");
90 // set addon version so that safe updates are possible later
91 $addon_version = get_config("jappixmini", "version");
92 if ($addon_version==="") set_config("jappixmini", "version", "1");
96 function jappixmini_uninstall() {
97 unregister_hook('plugin_settings', 'addon/jappixmini/jappixmini.php', 'jappixmini_settings');
98 unregister_hook('plugin_settings_post', 'addon/jappixmini/jappixmini.php', 'jappixmini_settings_post');
100 unregister_hook('page_end', 'addon/jappixmini/jappixmini.php', 'jappixmini_script');
101 unregister_hook('authenticate', 'addon/jappixmini/jappixmini.php', 'jappixmini_login');
103 unregister_hook('cron', 'addon/jappixmini/jappixmini.php', 'jappixmini_cron');
105 unregister_hook('about_hook', 'addon/jappixmini/jappixmini.php', 'jappixmini_download_source');
108 function jappixmini_plugin_admin(&$a, &$o) {
109 // display instructions and warnings on addon settings page for admin
111 if (!file_exists("addon/jappixmini.tgz")) {
112 $o .= '<p><strong style="color:#fff;background-color:#f00">The source archive jappixmini.tgz does not exist. This is probably a violation of the Jappix License (AGPL).</strong></p>';
115 // warn if cron job has not yet been executed
116 $cron_run = get_config("jappixmini", "last_cron_execution");
117 if (!$cron_run) $o .= "<p><strong>Warning: The cron job has not yet been executed. If this message is still there after some time (usually 10 minutes), this means that autosubscribe and autoaccept will not work.</strong></p>";
120 $bosh_proxy = intval(get_config("jappixmini", "bosh_proxy"));
121 $bosh_proxy = intval($bosh_proxy) ? ' checked="checked"' : '';
122 $o .= '<label for="jappixmini-proxy">Activate BOSH proxy</label>';
123 $o .= ' <input id="jappixmini-proxy" type="checkbox" name="jappixmini-proxy" value="1"'.$bosh_proxy.' /><br />';
126 $info_text = get_config("jappixmini", "infotext");
127 $o .= '<p><label for="jappixmini-infotext">Info text to help users with configuration (important if you want to provide your own BOSH host!):</label><br />';
128 $o .= '<textarea id="jappixmini-infotext" name="jappixmini-infotext" rows="5" cols="50">'.htmlentities($info_text).'</textarea></p>';
131 $o .= '<input type="submit" name="jappixmini-admin-settings" value="OK" />';
134 function jappixmini_plugin_admin_post(&$a) {
136 $submit = $_REQUEST['jappixmini-admin-settings'];
138 $info_text = $_REQUEST['jappixmini-infotext'];
139 $bosh_proxy = intval($_REQUEST['jappixmini-proxy']);
140 set_config("jappixmini", "infotext", $info_text);
141 set_config("jappixmini", "bosh_proxy", $bosh_proxy);
145 function jappixmini_module() {}
146 function jappixmini_init(&$a) {
147 // module page where other Friendica sites can submit Jabber addresses to and also can query Jabber addresses
150 $dfrn_id = $_REQUEST["dfrn_id"];
151 if (!$dfrn_id) killme();
153 $role = $_REQUEST["role"];
155 $r = q("SELECT * FROM `contact` WHERE LENGTH(`pubkey`) AND `dfrn-id`='%s' LIMIT 1",
158 if (!count($r)) killme();
160 $encrypt_func = openssl_public_encrypt;
161 $decrypt_func = openssl_public_decrypt;
162 $key = $r[0]["pubkey"];
163 } else if ($role=="prv") {
164 $r = q("SELECT * FROM `contact` WHERE LENGTH(`prvkey`) AND `issued-id`='%s' LIMIT 1",
167 if (!count($r)) killme();
169 $encrypt_func = openssl_private_encrypt;
170 $decrypt_func = openssl_private_decrypt;
171 $key = $r[0]["prvkey"];
178 // save the Jabber address we received
180 $signed_address_hex = $_REQUEST["signed_address"];
181 $signed_address = hex2bin($signed_address_hex);
183 $trusted_address = "";
184 $decrypt_func($signed_address, $trusted_address, $key);
186 $now = intval(time());
187 set_pconfig($uid, "jappixmini", "id:$dfrn_id", "$now:$trusted_address");
188 } catch (Exception $e) {
191 // do not return an address if user deactivated plugin
192 $activated = get_pconfig($uid, 'jappixmini', 'activate');
193 if (!$activated) killme();
195 // return the requested Jabber address
197 $username = get_pconfig($uid, 'jappixmini', 'username');
198 $server = get_pconfig($uid, 'jappixmini', 'server');
199 $address = "$username@$server";
201 $encrypted_address = "";
202 $encrypt_func($address, $encrypted_address, $key);
204 $encrypted_address_hex = bin2hex($encrypted_address);
208 "encrypted_address"=>$encrypted_address_hex
211 $answer_json = json_encode($answer);
214 } catch (Exception $e) {
219 function jappixmini_settings(&$a, &$s) {
220 // addon settings for a user
222 $activate = get_pconfig(local_user(),'jappixmini','activate');
223 $activate = intval($activate) ? ' checked="checked"' : '';
225 $username = get_pconfig(local_user(),'jappixmini','username');
226 $username = htmlentities($username);
227 $server = get_pconfig(local_user(),'jappixmini','server');
228 $server = htmlentities($server);
229 $bosh = get_pconfig(local_user(),'jappixmini','bosh');
230 $bosh = htmlentities($bosh);
231 $password = get_pconfig(local_user(),'jappixmini','password');
232 $autosubscribe = get_pconfig(local_user(),'jappixmini','autosubscribe');
233 $autosubscribe = intval($autosubscribe) ? ' checked="checked"' : '';
234 $autoapprove = get_pconfig(local_user(),'jappixmini','autoapprove');
235 $autoapprove = intval($autoapprove) ? ' checked="checked"' : '';
236 $encrypt = intval(get_pconfig(local_user(),'jappixmini','encrypt'));
237 $encrypt_checked = $encrypt ? ' checked="checked"' : '';
238 $encrypt_disabled = $encrypt ? '' : ' disabled="disabled"';
240 $info_text = get_config("jappixmini", "infotext");
241 $info_text = htmlentities($info_text);
242 $info_text = str_replace("\n", "<br />", $info_text);
245 $r = q("SELECT COUNT(1) as `cnt` FROM `pconfig` WHERE `uid`=%d AND `cat`='jappixmini' AND `k` LIKE 'id:%%'", local_user());
246 if (count($r)) $contact_cnt = $r[0]["cnt"];
247 else $contact_cnt = 0;
249 // count jabber addresses
250 $r = q("SELECT COUNT(1) as `cnt` FROM `pconfig` WHERE `uid`=%d AND `cat`='jappixmini' AND `k` LIKE 'id:%%' AND `v` LIKE '%%@%%'", local_user());
251 if (count($r)) $address_cnt = $r[0]["cnt"];
252 else $address_cnt = 0;
255 // load scripts if not yet activated so that password can be saved
256 $a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&g=mini.xml"></script>'."\r\n";
257 $a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=presence.js~caps.js~name.js~roster.js"></script>'."\r\n";
259 $a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/lib.js"></script>'."\r\n";
262 $s .= '<div class="settings-block">';
264 $s .= '<h3>Jappix Mini addon settings</h3>';
266 $s .= '<label for="jappixmini-activate">Activate addon</label>';
267 $s .= ' <input id="jappixmini-activate" type="checkbox" name="jappixmini-activate" value="1"'.$activate.' />';
269 $s .= '<label for="jappixmini-username">Jabber username</label>';
270 $s .= ' <input id="jappixmini-username" type="text" name="jappixmini-username" value="'.$username.'" />';
272 $s .= '<label for="jappixmini-server">Jabber server</label>';
273 $s .= ' <input id="jappixmini-server" type="text" name="jappixmini-server" value="'.$server.'" />';
276 $s .= '<label for="jappixmini-bosh">Jabber BOSH host</label>';
277 $s .= ' <input id="jappixmini-bosh" type="text" name="jappixmini-bosh" value="'.$bosh.'" />';
280 $s .= '<label for="jappixmini-password">Jabber password</label>';
281 $s .= ' <input type="hidden" id="jappixmini-password" name="jappixmini-encrypted-password" value="'.$password.'" />';
282 $s .= ' <input id="jappixmini-clear-password" type="password" value="" onchange="jappixmini_set_password();" />';
284 $onchange = "document.getElementById('jappixmini-friendica-password').disabled = !this.checked;jappixmini_set_password();";
285 $s .= '<label for="jappixmini-encrypt">Encrypt Jabber password with Friendica password (recommended)</label>';
286 $s .= ' <input id="jappixmini-encrypt" type="checkbox" name="jappixmini-encrypt" onchange="'.$onchange.'" value="1"'.$encrypt_checked.' />';
288 $s .= '<label for="jappixmini-friendica-password">Friendica password</label>';
289 $s .= ' <input id="jappixmini-friendica-password" name="jappixmini-friendica-password" type="password" onchange="jappixmini_set_password();" value=""'.$encrypt_disabled.' />';
291 $s .= '<label for="jappixmini-autoapprove">Approve subscription requests from Friendica contacts automatically</label>';
292 $s .= ' <input id="jappixmini-autoapprove" type="checkbox" name="jappixmini-autoapprove" value="1"'.$autoapprove.' />';
294 $s .= '<label for="jappixmini-autosubscribe">Subscribe to Friendica contacts automatically</label>';
295 $s .= ' <input id="jappixmini-autosubscribe" type="checkbox" name="jappixmini-autosubscribe" value="1"'.$autosubscribe.' />';
297 $s .= '<label for="jappixmini-purge">Purge internal list of jabber addresses of contacts</label>';
298 $s .= ' <input id="jappixmini-purge" type="checkbox" name="jappixmini-purge" value="1" />';
300 if ($info_text) $s .= '<br />Configuration help:<p style="margin-left:2em;">'.$info_text.'</p>';
301 $s .= '<br />Status:<p style="margin-left:2em;">Addon knows '.$address_cnt.' Jabber addresses of '.$contact_cnt.' Friendica contacts (takes some time, usually 10 minutes, to update).</p>';
302 $s .= '<input type="submit" name="jappixmini-submit" value="' . t('Submit') . '" />';
303 $s .= ' <input type="button" value="Add contact" onclick="jappixmini_addon_subscribe();" />';
308 $a->page['htmlhead'] .= "<script type=\"text/javascript\">
309 function jappixmini_set_password() {
310 encrypt = document.getElementById('jappixmini-encrypt').checked;
311 password = document.getElementById('jappixmini-password');
312 clear_password = document.getElementById('jappixmini-clear-password');
314 friendica_password = document.getElementById('jappixmini-friendica-password');
316 if (friendica_password) {
317 jappixmini_addon_set_client_secret(friendica_password.value);
318 jappixmini_addon_encrypt_password(clear_password.value, function(encrypted_password){
319 password.value = encrypted_password;
324 password.value = clear_password.value;
328 jQuery(document).ready(function() {
329 encrypt = document.getElementById('jappixmini-encrypt').checked;
330 password = document.getElementById('jappixmini-password');
331 clear_password = document.getElementById('jappixmini-clear-password');
333 jappixmini_addon_decrypt_password(password.value, function(decrypted_password){
334 clear_password.value = decrypted_password;
338 clear_password.value = password.value;
344 function jappixmini_settings_post(&$a,&$b) {
345 // save addon settings for a user
347 if(! local_user()) return;
350 if($_POST['jappixmini-submit']) {
351 $encrypt = intval($b['jappixmini-encrypt']);
353 // check that Jabber password was encrypted with correct Friendica password
354 $friendica_password = trim($b['jappixmini-friendica-password']);
355 $encrypted = hash('whirlpool',$friendica_password);
356 $r = q("SELECT * FROM `user` WHERE `uid`=$uid AND `password`='%s'",
360 info("Wrong friendica password!");
365 $purge = intval($b['jappixmini-purge']);
367 $username = trim($b['jappixmini-username']);
368 $old_username = get_pconfig($uid,'jappixmini','username');
369 if ($username!=$old_username) $purge = 1;
371 $server = trim($b['jappixmini-server']);
372 $old_server = get_pconfig($uid,'jappixmini','server');
373 if ($server!=$old_server) $purge = 1;
375 set_pconfig($uid,'jappixmini','username',$username);
376 set_pconfig($uid,'jappixmini','server',$server);
377 set_pconfig($uid,'jappixmini','bosh',trim($b['jappixmini-bosh']));
378 set_pconfig($uid,'jappixmini','password',trim($b['jappixmini-encrypted-password']));
379 set_pconfig($uid,'jappixmini','autosubscribe',intval($b['jappixmini-autosubscribe']));
380 set_pconfig($uid,'jappixmini','autoapprove',intval($b['jappixmini-autoapprove']));
381 set_pconfig($uid,'jappixmini','activate',intval($b['jappixmini-activate']));
382 set_pconfig($uid,'jappixmini','encrypt',$encrypt);
383 info( 'Jappix Mini settings saved.' );
386 q("DELETE FROM `pconfig` WHERE `uid`=$uid AND `cat`='jappixmini' AND `k` LIKE 'id:%%'");
387 info( 'List of addresses purged.' );
392 function jappixmini_script(&$a,&$s) {
393 // adds the script to the page header which starts Jappix Mini
395 if(! local_user()) return;
397 $activate = get_pconfig(local_user(),'jappixmini','activate');
398 if (!$activate) return;
400 $a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&g=mini.xml"></script>'."\r\n";
401 $a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=presence.js~caps.js~name.js~roster.js"></script>'."\r\n";
403 $a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/lib.js"></script>'."\r\n";
405 $username = get_pconfig(local_user(),'jappixmini','username');
406 $username = str_replace("'", "\\'", $username);
407 $server = get_pconfig(local_user(),'jappixmini','server');
408 $server = str_replace("'", "\\'", $server);
409 $bosh = get_pconfig(local_user(),'jappixmini','bosh');
410 $bosh = str_replace("'", "\\'", $bosh);
411 $encrypt = get_pconfig(local_user(),'jappixmini','encrypt');
412 $encrypt = intval($encrypt);
413 $password = get_pconfig(local_user(),'jappixmini','password');
414 $password = str_replace("'", "\\'", $password);
416 $autoapprove = get_pconfig(local_user(),'jappixmini','autoapprove');
417 $autoapprove = intval($autoapprove);
418 $autosubscribe = get_pconfig(local_user(),'jappixmini','autosubscribe');
419 $autosubscribe = intval($autosubscribe);
421 // set proxy if necessary
422 $use_proxy = get_config('jappixmini','bosh_proxy');
424 $proxy = $a->get_baseurl().'/addon/jappixmini/proxy.php';
430 // get a list of jabber accounts of the contacts
433 $rows = q("SELECT * FROM `pconfig` WHERE `uid`=$uid AND `cat`='jappixmini' AND `k` LIKE 'id:%%'");
434 foreach ($rows as $row) {
436 $pos = strpos($key, ":");
437 $dfrn_id = substr($key, $pos+1);
438 $r = q("SELECT `name` FROM `contact` WHERE `uid`=$uid AND `dfrn-id`='%s' OR `issued-id`='%s'",
442 $name = $r[0]["name"];
445 $pos = strpos($value, ":");
446 $address = substr($value, $pos+1);
447 if (!$address) continue;
448 if (!$name) $name = $address;
450 $contacts[$address] = $name;
452 $contacts_json = json_encode($contacts);
453 $contacts_hash = sha1($contacts_json);
456 $r = q("SELECT `username` FROM `user` WHERE `uid`=$uid");
457 $nickname = json_encode($r[0]["username"]);
459 // add javascript to start Jappix Mini
460 $a->page['htmlhead'] .= "<script type=\"text/javascript\">
461 jQuery(document).ready(function() {
462 jappixmini_addon_start('$server', '$username', '$proxy', '$bosh', $encrypt, '$password', $nickname, $contacts_json, '$contacts_hash', $autoapprove, $autosubscribe);
469 function jappixmini_login(&$a, &$o) {
470 // create client secret on login to be able to encrypt jabber passwords
472 // for setDB and str_sha1, needed by jappixmini_addon_set_client_secret
473 $a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=datastore.js~jsjac.js"></script>'."\r\n";
475 // for jappixmini_addon_set_client_secret
476 $a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/lib.js"></script>'."\r\n";
478 // save hash of password
479 $o = str_replace("<form ", "<form onsubmit=\"jappixmini_addon_set_client_secret(this.elements['id_password'].value);return true;\" ", $o);
482 function jappixmini_cron(&$a, $d) {
483 // For autosubscribe/autoapprove, we need to maintain a list of jabber addresses of our contacts.
485 set_config("jappixmini", "last_cron_execution", $d);
487 // go through list of users with jabber enabled
488 $users = q("SELECT `uid` FROM `pconfig` WHERE `cat`='jappixmini' AND (`k`='autosubscribe' OR `k`='autoapprove') AND `v`='1'");
489 logger("jappixmini: Update list of contacts' jabber accounts for ".count($users)." users.");
491 foreach ($users as $row) {
494 // for each user, go through list of contacts
495 $contacts = q("SELECT * FROM `contact` WHERE `uid`=%d AND ((LENGTH(`dfrn-id`) AND LENGTH(`pubkey`)) OR (LENGTH(`issued-id`) AND LENGTH(`prvkey`)))", intval($uid));
496 foreach ($contacts as $contact_row) {
497 $request = $contact_row["request"];
498 if (!$request) continue;
500 $dfrn_id = $contact_row["dfrn-id"];
502 $key = $contact_row["pubkey"];
503 $encrypt_func = openssl_public_encrypt;
504 $decrypt_func = openssl_public_decrypt;
507 $dfrn_id = $contact_row["issued-id"];
508 $key = $contact_row["prvkey"];
509 $encrypt_func = openssl_private_encrypt;
510 $decrypt_func = openssl_private_decrypt;
514 // check if jabber address already present
515 $present = get_pconfig($uid, "jappixmini", "id:".$dfrn_id);
516 $now = intval(time());
518 // $present has format "timestamp:jabber_address"
519 $p = strpos($present, ":");
520 $timestamp = intval(substr($present, 0, $p));
522 // do not re-retrieve jabber address if last retrieval
523 // is not older than a week
524 if ($now-$timestamp<3600*24*7) continue;
527 // construct base retrieval address
528 $pos = strpos($request, "/dfrn_request/");
529 if ($pos===false) continue;
531 $base = substr($request, 0, $pos)."/jappixmini?role=$role";
533 // construct own address
534 $username = get_pconfig($uid, 'jappixmini', 'username');
535 if (!$username) continue;
536 $server = get_pconfig($uid, 'jappixmini', 'server');
537 if (!$server) continue;
539 $address = $username."@".$server;
542 $signed_address = "";
543 $encrypt_func($address, $signed_address, $key);
545 // construct request url
546 $signed_address_hex = bin2hex($signed_address);
547 $url = $base."&signed_address=$signed_address_hex&dfrn_id=".urlencode($dfrn_id);
551 $answer_json = fetch_url($url);
554 $answer = json_decode($answer_json);
555 if ($answer->status != "ok") throw new Exception();
557 $encrypted_address_hex = $answer->encrypted_address;
558 if (!$encrypted_address_hex) throw new Exception();
560 $encrypted_address = hex2bin($encrypted_address_hex);
561 if (!$encrypted_address) throw new Exception();
564 $decrypted_address = "";
565 $decrypt_func($encrypted_address, $decrypted_address, $key);
566 if (!$decrypted_address) throw new Exception();
567 } catch (Exception $e) {
568 $decrypted_address = "";
572 set_pconfig($uid, "jappixmini", "id:$dfrn_id", "$now:$decrypted_address");
577 function jappixmini_download_source(&$a,&$b) {
578 // Jappix Mini source download link on About page
580 $b .= '<h1>Jappix Mini</h1>';
581 $b .= '<p>This site uses the jappixmini addon, which includes Jappix Mini by the <a href="'.$a->get_baseurl().'/addon/jappixmini/jappix/AUTHORS">Jappix authors</a> and is distributed under the terms of the <a href="'.$a->get_baseurl().'/addon/jappixmini/jappix/COPYING">GNU Affero General Public License</a>.</p>';
582 $b .= '<p>You can download the <a href="'.$a->get_baseurl().'/addon/jappixmini.tgz">source code of the addon</a>. The rest of Friendica is distributed under compatible licenses and can be retrieved from <a href="https://github.com/friendica/friendica">https://github.com/friendica/friendica</a> and <a href="https://github.com/friendica/friendica-addons">https://github.com/friendica/friendica-addons</a></p>';