538 lines
22 KiB
PHP
538 lines
22 KiB
PHP
<?php
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/**
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* Name: jappixmini
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* Description: Inserts a jabber chat
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* Version: 1.0
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* Author: leberwurscht
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*
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*/
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/*
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Problem:
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* jabber password should not be stored on server
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* jabber password should not be sent between server and browser as soon as the user is logged in
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* jabber password should not be reconstructible from communication between server and browser as soon as the user is logged in
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Solution:
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Only store an encrypted version of the jabber password on the server. The encryption key is only available to the browser
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and not to the server (at least as soon as the user is logged in). It can be stored using the jappix setDB function.
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This encryption key could be the friendica password, but then this password would be stored in the browser in cleartext.
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It is better to use a hash of the password.
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The server should not be able to reconstruct the password, so we can't take the same hash the server stores. But we can
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use hash("some_prefix"+password). This will however not work with OpenID logins, for this type of login the password must
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be queried manually.
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Problem:
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How to discover the jabber addresses of the friendica contacts?
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Solution:
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Each Friendica site with this addon provides a /jappixmini/ module page. We go through our contacts and retrieve
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this information every week using a cron hook.
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Problem:
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We do not want to make the jabber address public.
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Solution:
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When two friendica users connect using DFRN, the relation gets a DFRN ID and a keypair is generated.
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Using this keypair, we can provide the jabber address only to contacts:
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Alice:
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signed_address = openssl_*_encrypt(alice_jabber_address)
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send signed_address to Bob, who does
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trusted_address = openssl_*_decrypt(signed_address)
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save trusted_address
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encrypted_address = openssl_*_encrypt(bob_jabber_address)
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reply with encrypted_address to Alice, who does
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decrypted_address = openssl_*_decrypt(encrypted_address)
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save decrypted_address
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Interface for this:
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GET /jappixmini/?role=%s&signed_address=%s&dfrn_id=%s
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Response:
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json({"status":"ok", "encrypted_address":"%s"})
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*/
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function jappixmini_install() {
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register_hook('plugin_settings', 'addon/jappixmini/jappixmini.php', 'jappixmini_settings');
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register_hook('plugin_settings_post', 'addon/jappixmini/jappixmini.php', 'jappixmini_settings_post');
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register_hook('page_end', 'addon/jappixmini/jappixmini.php', 'jappixmini_script');
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register_hook('authenticate', 'addon/jappixmini/jappixmini.php', 'jappixmini_login');
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register_hook('cron', 'addon/jappixmini/jappixmini.php', 'jappixmini_cron');
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// Jappix source download as required by AGPL
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register_hook('about_hook', 'addon/jappixmini/jappixmini.php', 'jappixmini_download_source');
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}
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function jappixmini_uninstall() {
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unregister_hook('plugin_settings', 'addon/jappixmini/jappixmini.php', 'jappixmini_settings');
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unregister_hook('plugin_settings_post', 'addon/jappixmini/jappixmini.php', 'jappixmini_settings_post');
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unregister_hook('page_end', 'addon/jappixmini/jappixmini.php', 'jappixmini_script');
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unregister_hook('authenticate', 'addon/jappixmini/jappixmini.php', 'jappixmini_login');
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unregister_hook('cron', 'addon/jappixmini/jappixmini.php', 'jappixmini_cron');
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unregister_hook('about_hook', 'addon/jappixmini/jappixmini.php', 'jappixmini_download_source');
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}
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function jappixmini_plugin_admin(&$a, &$o) {
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// display instructions and warnings on addon settings page for admin
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if (!file_exists("addon/jappixmini/jappix")) {
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$o .= '<p><strong>You need to install the Jappix application, adapted for Friendica (see README).</strong></p>';
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}
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else if (!file_exists("addon/jappixmini/jappix.zip")) {
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$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>';
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}
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else {
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$o .= '<p>Jappix is installed.</p>';
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}
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}
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function jappixmini_plugin_admin_post(&$a) {
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}
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function jappixmini_module() {}
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function jappixmini_init(&$a) {
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// module page where other Friendica sites can submit Jabber addresses to and also can query Jabber addresses
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// of local users
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if (!file_exists("addon/jappixmini/jappix")) killme();
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$dfrn_id = $_REQUEST["dfrn_id"];
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if (!$dfrn_id) killme();
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$role = $_REQUEST["role"];
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if ($role=="pub") {
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$r = q("SELECT * FROM `contact` WHERE LENGTH(`pubkey`) AND `dfrn-id`='%s' LIMIT 1",
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dbesc($dfrn_id)
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);
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if (!count($r)) killme();
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$encrypt_func = openssl_public_encrypt;
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$decrypt_func = openssl_public_decrypt;
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$key = $r[0]["pubkey"];
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} else if ($role=="prv") {
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$r = q("SELECT * FROM `contact` WHERE LENGTH(`prvkey`) AND `issued-id`='%s' LIMIT 1",
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dbesc($dfrn_id)
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);
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if (!count($r)) killme();
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$encrypt_func = openssl_private_encrypt;
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$decrypt_func = openssl_private_decrypt;
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$key = $r[0]["prvkey"];
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} else {
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killme();
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}
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$uid = $r[0]["uid"];
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// save the Jabber address we received
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try {
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$signed_address_hex = $_REQUEST["signed_address"];
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$signed_address = hex2bin($signed_address_hex);
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$trusted_address = "";
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$decrypt_func($signed_address, $trusted_address, $key);
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$now = intval(time());
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set_pconfig($uid, "jappixmini", "id:$dfrn_id", "$now:$trusted_address");
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} catch (Exception $e) {
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}
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// return the requested Jabber address
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try {
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$username = get_pconfig($uid, 'jappixmini', 'username');
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$server = get_pconfig($uid, 'jappixmini', 'server');
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$address = "$username@$server";
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$encrypted_address = "";
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$encrypt_func($address, $encrypted_address, $key);
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$encrypted_address_hex = bin2hex($encrypted_address);
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$answer = Array(
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"status"=>"ok",
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"encrypted_address"=>$encrypted_address_hex
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);
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$answer_json = json_encode($answer);
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echo $answer_json;
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killme();
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} catch (Exception $e) {
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killme();
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}
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}
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function jappixmini_settings(&$a, &$s) {
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// addon settings for a user
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if (!file_exists("addon/jappixmini/jappix")) return;
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$activate = get_pconfig(local_user(),'jappixmini','activate');
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$activate = intval($activate) ? ' checked="checked"' : '';
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$username = get_pconfig(local_user(),'jappixmini','username');
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$username = htmlentities($username);
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$server = get_pconfig(local_user(),'jappixmini','server');
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$server = htmlentities($server);
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$bosh = get_pconfig(local_user(),'jappixmini','bosh');
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$bosh = htmlentities($bosh);
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$password = get_pconfig(local_user(),'jappixmini','password');
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$autosubscribe = get_pconfig(local_user(),'jappixmini','autosubscribe');
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$autosubscribe = intval($autosubscribe) ? ' checked="checked"' : '';
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$autoapprove = get_pconfig(local_user(),'jappixmini','autoapprove');
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$autoapprove = intval($autoapprove) ? ' checked="checked"' : '';
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$encrypt = intval(get_pconfig(local_user(),'jappixmini','encrypt'));
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$encrypt_checked = $encrypt ? ' checked="checked"' : '';
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$encrypt_disabled = $encrypt ? '' : ' disabled="disabled"';
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if (!$activate) {
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// load scripts if not yet activated so that password can be saved
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$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&g=mini.xml"></script>'."\r\n";
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$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=presence.js"></script>'."\r\n";
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$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=caps.js"></script>'."\r\n";
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$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=name.js"></script>'."\r\n";
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$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=roster.js"></script>'."\r\n";
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$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/lib.js"></script>'."\r\n";
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}
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$s .= '<div class="settings-block">';
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$s .= '<h3>Jappix Mini addon settings</h3>';
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$s .= '<div>';
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$s .= '<label for="jappixmini-activate">Activate addon</label>';
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$s .= ' <input id="jappixmini-activate" type="checkbox" name="jappixmini-activate" value="1"'.$activate.' />';
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$s .= '<br />';
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$s .= '<label for="jappixmini-username">Jabber username</label>';
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$s .= ' <input id="jappixmini-username" type="text" name="jappixmini-username" value="'.$username.'" />';
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$s .= '<br />';
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$s .= '<label for="jappixmini-server">Jabber server</label>';
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$s .= ' <input id="jappixmini-server" type="text" name="jappixmini-server" value="'.$server.'" />';
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$s .= '<br />';
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$conf = file_get_contents("addon/jappixmini/jappix/store/conf/main.xml");
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preg_match("/<bosh_proxy>(.*)<\/bosh_proxy>/", $conf, $matches);
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if ($matches[1]=="on") {
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$s .= '<label for="jappixmini-bosh">Jabber BOSH host</label>';
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$s .= ' <input id="jappixmini-bosh" type="text" name="jappixmini-bosh" value="'.$bosh.'" />';
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$s .= '<br />';
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}
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$s .= '<label for="jappixmini-password">Jabber password</label>';
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$s .= ' <input type="hidden" id="jappixmini-password" name="jappixmini-encrypted-password" value="'.$password.'" />';
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$s .= ' <input id="jappixmini-clear-password" type="password" value="" onchange="jappixmini_set_password();" />';
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$s .= '<br />';
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$onchange = "document.getElementById('jappixmini-friendica-password').disabled = !this.checked;jappixmini_set_password();";
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$s .= '<label for="jappixmini-encrypt">Encrypt Jabber password with Friendica password (recommended)</label>';
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$s .= ' <input id="jappixmini-encrypt" type="checkbox" name="jappixmini-encrypt" onchange="'.$onchange.'" value="1"'.$encrypt_checked.' />';
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$s .= '<br />';
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$s .= '<label for="jappixmini-friendica-password">Friendica password</label>';
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$s .= ' <input id="jappixmini-friendica-password" name="jappixmini-friendica-password" type="password" onchange="jappixmini_set_password();" value=""'.$encrypt_disabled.' />';
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$s .= '<br />';
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$s .= '<label for="jappixmini-autoapprove">Approve subscription requests from Friendica contacts automatically</label>';
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$s .= ' <input id="jappixmini-autoapprove" type="checkbox" name="jappixmini-autoapprove" value="1"'.$autoapprove.' />';
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$s .= '<br />';
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$s .= '<label for="jappixmini-autosubscribe">Subscribe to Friendica contacts automatically</label>';
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$s .= ' <input id="jappixmini-autosubscribe" type="checkbox" name="jappixmini-autosubscribe" value="1"'.$autosubscribe.' />';
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$s .= '<br />';
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$s .= '<label for="jappixmini-purge">Purge internal list of jabber addresses of contacts</label>';
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$s .= ' <input id="jappixmini-purge" type="checkbox" name="jappixmini-purge" value="1" />';
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$s .= '<br />';
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$s .= '<input type="submit" name="jappixmini-submit" value="' . t('Submit') . '" />';
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$s .= ' <input type="button" value="Add contact" onclick="jappixmini_addon_subscribe();" />';
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$s .= '</div>';
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$s .= '</div>';
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$a->page['htmlhead'] .= "<script type=\"text/javascript\">
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function jappixmini_set_password() {
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encrypt = document.getElementById('jappixmini-encrypt').checked;
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password = document.getElementById('jappixmini-password');
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clear_password = document.getElementById('jappixmini-clear-password');
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if (encrypt) {
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friendica_password = document.getElementById('jappixmini-friendica-password');
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jappixmini_addon_set_client_secret(friendica_password.value);
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password.value = jappixmini_addon_encrypt_password(clear_password.value);
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}
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else {
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password.value = clear_password.value;
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}
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}
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jQuery(document).ready(function() {
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encrypt = document.getElementById('jappixmini-encrypt').checked;
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password = document.getElementById('jappixmini-password');
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clear_password = document.getElementById('jappixmini-clear-password');
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if (encrypt) {
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clear_password.value = jappixmini_addon_decrypt_password(password.value);
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}
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else {
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clear_password.value = password.value;
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}
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});
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</script>";
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}
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function jappixmini_settings_post(&$a,&$b) {
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// save addon settings for a user
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if (!file_exists("addon/jappixmini/jappix")) return;
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if(! local_user()) return;
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$uid = local_user();
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if($_POST['jappixmini-submit']) {
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$encrypt = intval($b['jappixmini-encrypt']);
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if ($encrypt) {
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// check that Jabber password was encrypted with correct Friendica password
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$friendica_password = trim($b['jappixmini-friendica-password']);
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$encrypted = hash('whirlpool',$friendica_password);
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$r = q("SELECT * FROM `user` WHERE `uid`=$uid AND `password`='%s'",
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dbesc($encrypted)
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);
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if (!count($r)) {
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info("Wrong friendica password!");
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return;
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}
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}
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$purge = intval($b['jappixmini-purge']);
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$username = trim($b['jappixmini-username']);
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$old_username = get_pconfig($uid,'jappixmini','username');
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if ($username!=$old_username) $purge = 1;
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$server = trim($b['jappixmini-server']);
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$old_server = get_pconfig($uid,'jappixmini','server');
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if ($server!=$old_server) $purge = 1;
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set_pconfig($uid,'jappixmini','username',$username);
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set_pconfig($uid,'jappixmini','server',$server);
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set_pconfig($uid,'jappixmini','bosh',trim($b['jappixmini-bosh']));
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set_pconfig($uid,'jappixmini','password',trim($b['jappixmini-encrypted-password']));
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set_pconfig($uid,'jappixmini','autosubscribe',intval($b['jappixmini-autosubscribe']));
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set_pconfig($uid,'jappixmini','autoapprove',intval($b['jappixmini-autoapprove']));
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set_pconfig($uid,'jappixmini','activate',intval($b['jappixmini-activate']));
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set_pconfig($uid,'jappixmini','encrypt',$encrypt);
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info( 'Jappix Mini settings saved.' );
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if ($purge) {
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q("DELETE FROM `pconfig` WHERE `uid`=$uid AND `cat`='jappixmini' and `k` LIKE 'id%%'");
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info( 'List of addresses purged.' );
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}
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}
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}
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function jappixmini_script(&$a,&$s) {
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// adds the script to the page header which starts Jappix Mini
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if (!file_exists("addon/jappixmini/jappix")) return;
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if(! local_user()) return;
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$activate = get_pconfig(local_user(),'jappixmini','activate');
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if (!$activate) return;
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$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&g=mini.xml"></script>'."\r\n";
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$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=presence.js"></script>'."\r\n";
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$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=caps.js"></script>'."\r\n";
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$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=name.js"></script>'."\r\n";
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$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=roster.js"></script>'."\r\n";
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$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/lib.js"></script>'."\r\n";
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$username = get_pconfig(local_user(),'jappixmini','username');
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$username = str_replace("'", "\\'", $username);
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$server = get_pconfig(local_user(),'jappixmini','server');
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$server = str_replace("'", "\\'", $server);
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$bosh = get_pconfig(local_user(),'jappixmini','bosh');
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$bosh = str_replace("'", "\\'", $bosh);
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$encrypt = get_pconfig(local_user(),'jappixmini','encrypt');
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$encrypt = intval($encrypt);
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$password = get_pconfig(local_user(),'jappixmini','password');
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$password = str_replace("'", "\\'", $password);
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$autoapprove = get_pconfig(local_user(),'jappixmini','autoapprove');
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$autoapprove = intval($autoapprove);
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$autosubscribe = get_pconfig(local_user(),'jappixmini','autosubscribe');
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$autosubscribe = intval($autosubscribe);
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// deactivate bosh host if proxy is off
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$conf = file_get_contents("addon/jappixmini/jappix/store/conf/main.xml");
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preg_match("/<bosh_proxy>(.*)<\/bosh_proxy>/", $conf, $matches);
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if ($matches[1]!="on") {
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$bosh = '';
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}
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// get a list of jabber accounts of the contacts
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$contacts = Array();
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$uid = local_user();
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$rows = q("SELECT * FROM `pconfig` WHERE `uid`=$uid AND `cat`='jappixmini' and `k` LIKE 'id%%'");
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foreach ($rows as $row) {
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$key = $row['k'];
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$pos = strpos($key, ":");
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$dfrn_id = substr($key, $pos+1);
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$r = q("SELECT `name` FROM `contact` WHERE `uid`=$uid AND `dfrn-id`='%s' OR `issued-id`='%s'",
|
|
dbesc($dfrn_id),
|
|
dbesc($dfrn_id)
|
|
);
|
|
$name = $r[0]["name"];
|
|
|
|
$value = $row['v'];
|
|
$pos = strpos($value, ":");
|
|
$address = substr($value, $pos+1);
|
|
if (!$address) continue;
|
|
if (!$name) $name = $address;
|
|
|
|
$contacts[$address] = $name;
|
|
}
|
|
$contacts_json = json_encode($contacts);
|
|
|
|
// get nickname
|
|
$r = q("SELECT `username` FROM `user` WHERE `uid`=$uid");
|
|
$nickname = json_encode($r[0]["username"]);
|
|
|
|
// add javascript to start Jappix Mini
|
|
$a->page['htmlhead'] .= "<script type=\"text/javascript\">
|
|
jQuery(document).ready(function() {
|
|
jappixmini_addon_start('$server', '$username', '$bosh', $encrypt, '$password', $nickname);
|
|
jappixmini_manage_roster($contacts_json, $autoapprove, $autosubscribe);
|
|
});
|
|
</script>";
|
|
|
|
return;
|
|
}
|
|
|
|
function jappixmini_login(&$a, &$o) {
|
|
// create client secret on login to be able to encrypt jabber passwords
|
|
|
|
if (!file_exists("addon/jappixmini/jappix")) return;
|
|
|
|
// for setDB, needed by jappixmini_addon_set_client_secret
|
|
$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=datastore.js"></script>'."\r\n";
|
|
|
|
// for str_sha1, needed by jappixmini_addon_set_client_secret
|
|
$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/jappix/php/get.php?t=js&f=jsjac.js"></script>'."\r\n";
|
|
|
|
// for jappixmini_addon_set_client_secret
|
|
$a->page['htmlhead'] .= '<script type="text/javascript" src="' . $a->get_baseurl() . '/addon/jappixmini/lib.js"></script>'."\r\n";
|
|
|
|
// save hash of password
|
|
$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.
|
|
|
|
if (!file_exists("addon/jappixmini/jappix")) return;
|
|
|
|
// 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 = $contact_row["dfrn-id"];
|
|
if ($dfrn_id) {
|
|
$key = $contact_row["pubkey"];
|
|
$encrypt_func = openssl_public_encrypt;
|
|
$decrypt_func = openssl_public_decrypt;
|
|
$role = "prv";
|
|
} else {
|
|
$dfrn_id = $contact_row["issued-id"];
|
|
$key = $contact_row["prvkey"];
|
|
$encrypt_func = openssl_private_encrypt;
|
|
$decrypt_func = openssl_private_decrypt;
|
|
$role = "pub";
|
|
}
|
|
|
|
// 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, $pos)."/jappixmini?role=$role";
|
|
|
|
// construct own address
|
|
$username = get_pconfig($uid, 'jappixmini', 'username');
|
|
if (!$username) continue;
|
|
$server = get_pconfig($uid, 'jappixmini', 'server');
|
|
if (!$server) continue;
|
|
|
|
$address = $username."@".$server;
|
|
|
|
// sign address
|
|
$signed_address = "";
|
|
$encrypt_func($address, $signed_address, $key);
|
|
|
|
// construct request url
|
|
$signed_address_hex = bin2hex($signed_address);
|
|
$url = $base."&signed_address=$signed_address_hex&dfrn_id=".urlencode($dfrn_id);
|
|
|
|
try {
|
|
// send request
|
|
$answer_json = fetch_url($url);
|
|
|
|
// parse answer
|
|
$answer = json_decode($answer_json);
|
|
if ($answer->status != "ok") throw new Exception();
|
|
|
|
$encrypted_address_hex = $answer->encrypted_address;
|
|
if (!$encrypted_address_hex) throw new Exception();
|
|
|
|
$encrypted_address = hex2bin($encrypted_address_hex);
|
|
if (!$encrypted_address) throw new Exception();
|
|
|
|
// decrypt address
|
|
$decrypted_address = "";
|
|
$decrypt_func($encrypted_address, $decrypted_address, $key);
|
|
if (!$decrypted_address) throw new Exception();
|
|
} catch (Exception $e) {
|
|
$decrypted_address = "";
|
|
}
|
|
|
|
// save address
|
|
set_pconfig($uid, "jappixmini", "id:$dfrn_id", "$now:$decrypted_address");
|
|
}
|
|
}
|
|
}
|
|
|
|
function jappixmini_download_source(&$a,&$b) {
|
|
// Jappix Mini source download link on About page
|
|
|
|
if (!file_exists("addon/jappixmini/jappix")) return;
|
|
|
|
$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>';
|
|
}
|