--- /dev/null
+<?php
+
+
+/**
+* Name: jappixmini
+* Description: Inserts a jabber chat
+* Version: 1.0
+* Author: leberwurscht
+*
+*/
+
+/*
+
+Problem:
+* jabber password should not be stored on server
+* jabber password should not be sent between server and browser as soon as the user is logged in
+* jabber password should not be reconstructible from communication between server and browser as soon as the user is logged in
+
+Solution:
+Only store an encrypted version of the jabber password on the server. The encryption key is only available to the browser
+and not to the server (at least as soon as the user is logged in). It can be stored using the jappix setDB function.
+
+This encryption key could be the friendica password, but then this password would be stored in the browser in cleartext.
+It is better to use a hash of the password.
+The server should not be able to reconstruct the password, so we can't take the same hash the server stores. But we can
+ use hash("some_prefix"+password). This will however not work with OpenID logins.
+
+Problem:
+How to discover the jabber addresses of the friendica contacts?
+
+Solution:
+Each Friendica site with this addon provides a /jappixmini/ module page. We go through our contacts and retrieve
+this information every week using a cron hook.
+
+Problem:
+We do not want to make the jabber address public.
+
+Solution:
+When two friendica users connect using DFRN, the relation gets a DFRN ID and a keypair is generated.
+Using this keypair, we can provide the jabber address only to contacs:
+
+Case 1: Alice has prvkey, Bob has pubkey.
+ Alice encrypts request
+ Bob decrypts the request, send jabber address unencrypted
+ Alice reads address
+
+Case 2: Alice has prvkey, Bob has pubkey
+ Alice send request
+ Bob encrypts jabber address
+ Alice decrypts jabber address
+
+*/
+
+function jappixmini_install() {
+register_hook('plugin_settings', 'addon/jappixmini/jappixmini.php', 'jappixmini_settings');
+register_hook('plugin_settings_post', 'addon/jappixmini/jappixmini.php', 'jappixmini_settings_post');
+
+register_hook('page_end', 'addon/jappixmini/jappixmini.php', 'jappixmini_script');
+register_hook('authenticate', 'addon/jappixmini/jappixmini.php', 'jappixmini_login');
+
+register_hook('cron', 'addon/jappixmini/jappixmini.php', 'jappixmini_cron');
+
+// Jappix source download as required by AGPL
+register_hook('about_hook', 'addon/jappixmini/jappixmini.php', 'jappixmini_download_source');
+}
+
+
+function jappixmini_uninstall() {
+unregister_hook('plugin_settings', 'addon/jappixmini/jappixmini.php', 'jappixmini_settings');
+unregister_hook('plugin_settings_post', 'addon/jappixmini/jappixmini.php', 'jappixmini_settings_post');
+
+unregister_hook('page_end', 'addon/jappixmini/jappixmini.php', 'jappixmini_script');
+unregister_hook('authenticate', 'addon/jappixmini/jappixmini.php', 'jappixmini_login');
+
+unregister_hook('cron', 'addon/jappixmini/jappixmini.php', 'jappixmini_cron');
+
+unregister_hook('about_hook', 'addon/jappixmini/jappixmini.php', 'jappixmini_download_source');
+}
+
+function jappixmini_plugin_admin(&$a, &$o) {
+ if (!file_exists("addon/jappixmini/jappix")) {
+ $o .= '<p><strong>You need to install the Jappix application, adapted for Friendica (see README).</strong></p>';
+ }
+ else if (!file_exists("addon/jappixmini/jappix.zip")) {
+ $o .= '<p><strong style="color:#fff;background-color:#f00">The source archive jappix.zip does not exist. This is probably a violation of the Jappix License (see README).</strong></p>';
+ }
+}
+
+function jappixmini_plugin_admin_post(&$a) {
+}
+
+function jappixmini_module() {}
+function jappixmini_init(&$a) {
+ // Here, other friendica sites can fetch the jabber address of local users.
+ // Because we do not want to publish the addresses publicly, they are encrypted so
+ // that only contacts can read it.
+ $encrypt_for = $_REQUEST["encrypt_for"];
+ if ($encrypt_for) {
+ $r = q("SELECT * FROM `contact` WHERE LENGTH(`pubkey`) AND `dfrn-id` = '%s' LIMIT 1",
+ dbesc($encrypt_for)
+ );
+ if (!count($r)) killme();
+
+ // get public key to encrypt address
+ $pubkey = $r[0]['pubkey'];
+
+ // get jabber address
+ $uid = $r[0]['uid'];
+ $username = get_pconfig($uid, 'jappixmini', 'username');
+ if (!$username) killme();
+ $server = get_pconfig($uid, 'jappixmini', 'server');
+ if (!$server) killme();
+
+ $address = $username."@".$server;
+
+ // encrypt address
+ $encrypted = "";
+ openssl_public_encrypt($address,$encrypted,$pubkey);
+
+ // calculate hex representation of encrypted address
+ $hex = bin2hex($encrypted);
+
+ // construct answer
+ $answer = Array("status"=>"ok", "encrypted_address"=>$hex);
+
+ // return answer as json
+ echo json_encode($answer);
+ killme();
+ }
+
+ // If we have only a private key, other site sends encrypted request, we answer unencrypted.
+ $encrypted_for = $_REQUEST["encrypted_for"];
+ if (!$encrypted_for) killme();
+
+ $encrypted_request_hex = $_REQUEST["encrypted_request"];
+ if (!$encrypted_request_hex) killme();
+ $encrypted_request = hex2bin($encrypted_request_hex);
+
+ $r = q("SELECT * FROM `contact` WHERE LENGTH(`prvkey`) AND `issued-id` = '%s' LIMIT 1",
+ dbesc($encrypted_for)
+ );
+ if (!count($r)) killme();
+
+ // decrypt request, validate it
+ $prvkey = $r[0]['prvkey'];
+ $decrypted_request = "";
+ openssl_private_decrypt($encrypted_request, $decrypted_request, $prvkey);
+
+ if ($decrypted_request!=$encrypted_for) killme();
+
+ // get jabber address
+ $uid = $r[0]['uid'];
+ $username = get_pconfig($uid, 'jappixmini', 'username');
+ if (!$username) killme();
+ $server = get_pconfig($uid, 'jappixmini', 'server');
+ if (!$server) killme();
+
+ $address = $username."@".$server;
+
+ // construct answer
+ $answer = Array("status"=>"ok", "address"=>$address);
+
+ // return answer as json
+ echo json_encode($answer);
+ killme();
+}
+
+function jappixmini_settings(&$a, &$s) {
+ $username = get_pconfig(local_user(),'jappixmini','username');
+ $username = htmlentities($username);
+ $server = get_pconfig(local_user(),'jappixmini','server');
+ $server = htmlentities($server);
+ $bosh = get_pconfig(local_user(),'jappixmini','bosh');
+ $bosh = htmlentities($bosh);
+ $encrypted_password = get_pconfig(local_user(),'jappixmini','encrypted-password');
+ $autosubscribe = get_pconfig(local_user(),'jappixmini','autosubscribe');
+ $autosubscribe = intval($autosubscribe) ? ' checked="checked"' : '';
+ $autoapprove = get_pconfig(local_user(),'jappixmini','autoapprove');
+ $autoapprove = intval($autoapprove) ? ' checked="checked"' : '';
+ $activate = get_pconfig(local_user(),'jappixmini','activate');
+ $activate = intval($activate) ? ' checked="checked"' : '';
+
+ $s .= '<div class="settings-block">';
+ $s .= '<h3>Jappix Mini addon settings</h3>';
+ $s .= '<div>';
+ $s .= '<label for="jappixmini-activate">Activate addon</label>';
+ $s .= ' <input id="jappixmini-activate" type="checkbox" name="jappixmini-activate" value="1"'.$activate.' />';
+ $s .= '<br />';
+ $s .= '<label for="jappixmini-username">Jabber username</label>';
+ $s .= ' <input id="jappixmini-username" type="text" name="jappixmini-username" value="'.$username.'" />';
+ $s .= '<br />';
+ $s .= '<label for="jappixmini-server">Jabber server</label>';
+ $s .= ' <input id="jappixmini-server" type="text" name="jappixmini-server" value="'.$server.'" />';
+ $s .= '<br />';
+ $s .= '<label for="jappixmini-bosh">Jabber BOSH host</label>';
+ $s .= ' <input id="jappixmini-bosh" type="text" name="jappixmini-bosh" value="'.$bosh.'" />';
+ $s .= '<br />';
+ $s .= '<label for="jappixmini-password">Jabber password</label>';
+ $s .= ' <input type="hidden" id="jappixmini-encrypted-password" name="jappixmini-encrypted-password" value="'.$encrypted_password.'" />';
+ $onchange = "document.getElementById('jappixmini-encrypted-password').value = jappixmini_addon_encrypt_password(document.getElementById('jappixmini-password').value);";
+ $s .= ' <input id="jappixmini-password" type="password" value="" onchange="'.$onchange.'" />';
+ $s .= '<br />';
+ $s .= '<label for="jappixmini-autoapprove">Approve subscription requests from Friendica contacts automatically</label>';
+ $s .= ' <input id="jappixmini-autoapprove" type="checkbox" name="jappixmini-autoapprove" value="1"'.$autoapprove.' />';
+ $s .= '<br />';
+ $s .= '<label for="jappixmini-autosubscribe">Subscribe to Friendica contacts automatically</label>';
+ $s .= ' <input id="jappixmini-autosubscribe" type="checkbox" name="jappixmini-autosubscribe" value="1"'.$autosubscribe.' />';
+ $s .= '<br />';
+ $s .= '<label for="jappixmini-purge">Purge list of jabber addresses of contacts</label>';
+ $s .= ' <input id="jappixmini-purge" type="checkbox" name="jappixmini-purge" value="1" />';
+ $s .= '<br />';
+ $s .= '<input type="submit" name="jappixmini-submit" value="' . t('Submit') . '" />';
+ $s .= '</div>';
+
+ $a->page['htmlhead'] .= "<script type=\"text/javascript\">
+ jQuery(document).ready(function() {
+ document.getElementById('jappixmini-password').value = jappixmini_addon_decrypt_password('$encrypted_password');
+ });
+ </script>";
+}
+
+function jappixmini_settings_post(&$a,&$b) {
+ if(! local_user()) return;
+
+ if($_POST['jappixmini-submit']) {
+ set_pconfig(local_user(),'jappixmini','username',trim($b['jappixmini-username']));
+ set_pconfig(local_user(),'jappixmini','server',trim($b['jappixmini-server']));
+ set_pconfig(local_user(),'jappixmini','bosh',trim($b['jappixmini-bosh']));
+ set_pconfig(local_user(),'jappixmini','encrypted-password',trim($b['jappixmini-encrypted-password']));
+ set_pconfig(local_user(),'jappixmini','autosubscribe',intval($b['jappixmini-autosubscribe']));
+ set_pconfig(local_user(),'jappixmini','autoapprove',intval($b['jappixmini-autoapprove']));
+ set_pconfig(local_user(),'jappixmini','activate',intval($b['jappixmini-activate']));
+ info( 'Jappix Mini settings saved.' );
+
+ if (intval($b['jappixmini-purge'])) {
+ $uid = local_user();
+ q("DELETE FROM `pconfig` WHERE `uid`=$uid AND `cat`='jappixmini' and `k` LIKE 'id%%'");
+ info( 'List of addresses purged.' );
+ }
+ }
+}
+
+function jappixmini_script(&$a,&$s) {
+ if(! local_user()) return;
+
+ $activate = get_pconfig(local_user(),'jappixmini','activate');
+ if (!$activate) return;
+
+ $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";
+ $a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=presence.js"></script>'."\r\n";
+
+ $a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=caps.js"></script>'."\r\n";
+ $a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=name.js"></script>'."\r\n";
+
+ $a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/lib.js"></script>'."\r\n";
+
+ $username = get_pconfig(local_user(),'jappixmini','username');
+ $username = str_replace("'", "\\'", $username);
+ $server = get_pconfig(local_user(),'jappixmini','server');
+ $server = str_replace("'", "\\'", $server);
+ $bosh = get_pconfig(local_user(),'jappixmini','bosh');
+ $bosh = str_replace("'", "\\'", $bosh);
+ $encrypted_password = get_pconfig(local_user(),'jappixmini','encrypted-password');
+ $encrypted_password = str_replace("'", "\\'", $encrypted_password);
+
+ $autoapprove = get_pconfig(local_user(),'jappixmini','autoapprove');
+ $autoapprove = intval($autoapprove);
+ $autosubscribe = get_pconfig(local_user(),'jappixmini','autosubscribe');
+ $autosubscribe = intval($autosubscribe);
+
+ // get a list of jabber accounts of the contacts
+ $contacts = Array();
+ $uid = local_user();
+ $rows = q("SELECT `v` FROM `pconfig` WHERE `uid`=$uid AND `cat`='jappixmini' and `k` LIKE 'id%%'");
+ foreach ($rows as $row) {
+ $value = $row['v'];
+ $pos = strpos($value, ":");
+ $address = substr($value, $pos+1);
+ $contacts[] = $address;
+ }
+ $contacts_json = json_encode($contacts);
+
+ $a->page['htmlhead'] .= "<script type=\"text/javascript\">
+ jQuery(document).ready(function() {
+ jappixmini_addon_start('$server', '$username', '$bosh', '$encrypted_password');
+ jappixmini_manage_roster($contacts_json, $autoapprove, $autosubscribe);
+ });
+ </script>";
+
+ return;
+}
+
+function jappixmini_login(&$a, &$o) {
+ // save hash of password using setDB
+ $o = str_replace("<form ", "<form onsubmit=\"jappixmini_addon_set_client_secret(this.elements['id_password'].value);return true;\" ", $o);
+}
+
+function jappixmini_cron(&$a, $d) {
+ // For autosubscribe/autoapprove, we need to maintain a list of jabber addresses of our contacts.
+
+ // go through list of users with jabber enabled
+ $users = q("SELECT `uid` FROM `pconfig` WHERE `cat`='jappixmini' AND (`k`='autosubscribe' OR `k`='autoapprove') AND `v`='1'");
+
+ foreach ($users as $row) {
+ $uid = $row["uid"];
+
+ // for each user, go through list of contacts
+ $contacts = q("SELECT * FROM `contact` WHERE `uid`=%d AND ((LENGTH(`dfrn-id`) AND LENGTH(`pubkey`)) OR (LENGTH(`issued-id`) AND LENGTH(`prvkey`)))", intval($uid));
+ foreach ($contacts as $contact_row) {
+ $request = $contact_row["request"];
+ if (!$request) continue;
+
+ $dfrn_id = $contact_row["dfrn-id"];
+ $pubkey = $contact_row["pubkey"];
+ if (!$dfrn_id) {
+ $dfrn_id = $contact_row["issued-id"];
+ $prvkey = $contact_row["prvkey"];
+ }
+
+ // check if jabber address already present
+ $present = get_pconfig($uid, "jappixmini", "id:".$dfrn_id);
+ $now = intval(time());
+ if ($present) {
+ // $present has format "timestamp:jabber_address"
+ $p = strpos($present, ":");
+ $timestamp = intval(substr($present, 0, $p));
+
+ // do not re-retrieve jabber address if last retrieval
+ // is not older than a week
+ if ($now-$timestamp<3600*24*7) continue;
+ }
+
+ // construct base retrieval address
+ $pos = strpos($request, "/dfrn_request/");
+ if ($pos===false) continue;
+
+ $base = substr($request, 0, $pos)."/jappixmini";
+
+ // retrieve address
+ if ($prvkey) {
+ $retrieval_address = $base."?encrypt_for=".urlencode($dfrn_id);
+
+ $answer_json = fetch_url($retrieval_address);
+ $answer = json_decode($answer_json);
+ if ($answer->status != "ok") continue;
+
+ $encrypted_address_hex = $answer->encrypted_address;
+ if (!$encrypted_address_hex) continue;
+ $encrypted_address = hex2bin($encrypted_address_hex);
+
+ $decrypted_address = "";
+ openssl_private_decrypt($encrypted_address, $decrypted_address, $prvkey);
+ if (!$decrypted_address) continue;
+
+ $address = $decrypted_address;
+ } else if ($pubkey) {
+ $encrypted_request = "";
+ openssl_public_encrypt($dfrn_id, $encrypted_request, $pubkey);
+ if (!$encrypted_request) continue;
+ $encrypted_request_hex = bin2hex($encrypted_request);
+
+ $retrieval_address = $base."?encrypted_for=".urlencode($dfrn_id)."&encrypted_request=".urlencode($encrypted_request_hex);
+
+ $answer_json = fetch_url($retrieval_address);
+ $answer = json_decode($answer_json);
+ if ($answer->status != "ok") continue;
+
+ $address = $answer->address;
+ if (!$address) continue;
+ }
+
+ // save address
+ set_pconfig($uid, "jappixmini", "id:$dfrn_id", "$now:$address");
+ }
+ }
+}
+
+function jappixmini_download_source(&$a,&$b) {
+ $b .= '<h1>Jappix Mini</h1>';
+ $b .= '<p>This site uses Jappix Mini by the <a href="'.$a->get_baseurl().'/addon/jappixmini/jappix/AUTHORS">Jappix authors</a>, which is distributed under the terms of the <a href="'.$a->get_baseurl().'/addon/jappixmini/jappix/COPYING">GNU Affero General Public License</a>.</p>';
+ $b .= '<p>You can download the <a href="'.$a->get_baseurl().'/addon/jappixmini/jappix.zip">source code</a>.</p>';
+}
--- /dev/null
+function jappixmini_addon_xor(str1, str2) {
+ if (str1.length != str2.length) throw "not same length";
+
+ encoded = "";
+
+ for (i=0; i<str1.length;i++) {
+ var a = str1.charCodeAt(i);
+ var b = str2.charCodeAt(i);
+ var c = a ^ b;
+
+ encoded += String.fromCharCode(c);
+ }
+
+ return encoded;
+}
+
+function jappixmini_addon_set_client_secret(password) {
+ client_secret = str_sha1("client_secret:"+password);
+ setDB('jappix-mini', 'client_secret', client_secret);
+}
+
+function jappixmini_addon_get_client_secret() {
+ client_secret = getDB('jappix-mini', 'client_secret');
+ if (client_secret===null) {
+ div = $('<div style="position:fixed;padding:1em;background-color:#F00;color:#fff;top:50px;left:50px;" id="x123">Reintroduce your Friendica password for chatting:</div>');
+ div.append($("<br>"));
+ input = $('<input type="password">')
+ div.append(input);
+ button = $('<input type="button" value="OK">');
+ button.click(function(){
+ password = input.val();
+ jappixmini_addon_set_client_secret(password);
+ div.remove();
+ });
+ div.append(button);
+ $("body").append(div);
+ }
+
+ return client_secret;
+}
+
+function jappixmini_addon_encrypt_password(password) {
+ client_secret = jappixmini_addon_get_client_secret();
+
+ // add \0 to password until it has the same length as secret
+ if (client_secret.length<password.length) throw "password too long";
+ while (password.length<client_secret.length) {
+ password += "\0";
+ }
+
+ // xor password with secret
+ encrypted_password = jappixmini_addon_xor(client_secret, password);
+
+ encrypted_password = encodeURI(encrypted_password)
+ return encrypted_password;
+}
+
+function jappixmini_addon_decrypt_password(encrypted_password) {
+ encrypted_password = decodeURI(encrypted_password);
+
+ client_secret = jappixmini_addon_get_client_secret();
+
+ // xor encrypted password with secret
+ password = jappixmini_addon_xor(client_secret, encrypted_password);
+
+ // remove \0
+ first_null = password.indexOf("\0")
+ password = password.substr(0, first_null);
+
+ return password;
+}
+
+function jappixmini_manage_roster(contacts, autoapprove, autosubscribe) {
+ // listen for subscriptions
+ con.registerHandler('presence',function(presence){
+ var type = presence.getType();
+ if (type != "subscribe") return;
+
+ var from = fullXID(getStanzaFrom(presence));
+ var xid = bareXID(from);
+
+ approve = true;
+ if ((!autoapprove) || ($.inArray(xid, contacts) == -1))
+ approve = confirm("Accept "+xid+" for chat?");
+
+ if (approve) {
+ acceptSubscribe(xid);
+ //alert("Accepted "+xid+" for chat.");
+ }
+ });
+
+ // autosubscribe
+ if (autosubscribe) {
+ for (i=0; i<contacts.length; i++) {
+ xid = contacts[i];
+ sendSubscribe(xid, "subscribe");
+ }
+ }
+}
+
+function jappixmini_addon_start(server, username, bosh, encrypted_password) {
+ // check if settings have changed, reinitialize jappix mini if this is the case
+ settings_identifier = str_sha1(server);
+ settings_identifier += str_sha1(username);
+ settings_identifier += str_sha1(bosh);
+ settings_identifier += str_sha1(encrypted_password);
+
+ saved_identifier = getDB("jappix-mini", "settings_identifier");
+ if (saved_identifier != settings_identifier) removeDB('jappix-mini', 'dom');
+ setDB("jappix-mini", "settings_identifier", settings_identifier);
+
+ // set bosh host
+ HOST_BOSH = HOST_BOSH+"?host_bosh="+encodeURI(bosh);
+
+ // decrypt password
+ password = jappixmini_addon_decrypt_password(encrypted_password);
+
+ // start jappix mini
+ launchMini(true, false, server, username, password);
+}
projects / friendica-addons.git / commitdiff