355 lines
11 KiB
PHP
355 lines
11 KiB
PHP
<?php
|
|
|
|
/**
|
|
* @file mod/dfrn_notify.php
|
|
* @brief The dfrn notify endpoint
|
|
* @see PDF with dfrn specs: https://github.com/friendica/friendica/blob/master/spec/dfrn2.pdf
|
|
*/
|
|
require_once('include/items.php');
|
|
require_once('include/dfrn.php');
|
|
require_once('include/event.php');
|
|
|
|
require_once('library/defuse/php-encryption-1.2.1/Crypto.php');
|
|
|
|
function dfrn_notify_post(App $a) {
|
|
logger(__function__, LOGGER_TRACE);
|
|
$dfrn_id = ((x($_POST,'dfrn_id')) ? notags(trim($_POST['dfrn_id'])) : '');
|
|
$dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
|
|
$challenge = ((x($_POST,'challenge')) ? notags(trim($_POST['challenge'])) : '');
|
|
$data = ((x($_POST,'data')) ? $_POST['data'] : '');
|
|
$key = ((x($_POST,'key')) ? $_POST['key'] : '');
|
|
$rino_remote = ((x($_POST,'rino')) ? intval($_POST['rino']) : 0);
|
|
$dissolve = ((x($_POST,'dissolve')) ? intval($_POST['dissolve']) : 0);
|
|
$perm = ((x($_POST,'perm')) ? notags(trim($_POST['perm'])) : 'r');
|
|
$ssl_policy = ((x($_POST,'ssl_policy')) ? notags(trim($_POST['ssl_policy'])): 'none');
|
|
$page = ((x($_POST,'page')) ? intval($_POST['page']) : 0);
|
|
|
|
$forum = (($page == 1) ? 1 : 0);
|
|
$prv = (($page == 2) ? 1 : 0);
|
|
|
|
$writable = (-1);
|
|
if($dfrn_version >= 2.21) {
|
|
$writable = (($perm === 'rw') ? 1 : 0);
|
|
}
|
|
|
|
$direction = (-1);
|
|
if(strpos($dfrn_id,':') == 1) {
|
|
$direction = intval(substr($dfrn_id,0,1));
|
|
$dfrn_id = substr($dfrn_id,2);
|
|
}
|
|
|
|
$r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
|
|
dbesc($dfrn_id),
|
|
dbesc($challenge)
|
|
);
|
|
if (! dbm::is_result($r)) {
|
|
logger('dfrn_notify: could not match challenge to dfrn_id ' . $dfrn_id . ' challenge=' . $challenge);
|
|
xml_status(3);
|
|
}
|
|
|
|
$r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s'",
|
|
dbesc($dfrn_id),
|
|
dbesc($challenge)
|
|
);
|
|
|
|
// find the local user who owns this relationship.
|
|
|
|
$sql_extra = '';
|
|
switch($direction) {
|
|
case (-1):
|
|
$sql_extra = sprintf(" AND ( `issued-id` = '%s' OR `dfrn-id` = '%s' ) ", dbesc($dfrn_id), dbesc($dfrn_id));
|
|
break;
|
|
case 0:
|
|
$sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
|
|
break;
|
|
case 1:
|
|
$sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
|
|
break;
|
|
default:
|
|
xml_status(3);
|
|
break; // NOTREACHED
|
|
}
|
|
|
|
// be careful - $importer will contain both the contact information for the contact
|
|
// sending us the post, and also the user information for the person receiving it.
|
|
// since they are mixed together, it is easy to get them confused.
|
|
|
|
$r = q("SELECT `contact`.*, `contact`.`uid` AS `importer_uid`,
|
|
`contact`.`pubkey` AS `cpubkey`,
|
|
`contact`.`prvkey` AS `cprvkey`,
|
|
`contact`.`thumb` AS `thumb`,
|
|
`contact`.`url` as `url`,
|
|
`contact`.`name` as `senderName`,
|
|
`user`.*
|
|
FROM `contact`
|
|
LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
|
|
WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
|
|
AND `user`.`nickname` = '%s' AND `user`.`account_expired` = 0 AND `user`.`account_removed` = 0 $sql_extra LIMIT 1",
|
|
dbesc($a->argv[1])
|
|
);
|
|
|
|
if (! dbm::is_result($r)) {
|
|
logger('dfrn_notify: contact not found for dfrn_id ' . $dfrn_id);
|
|
xml_status(3);
|
|
//NOTREACHED
|
|
}
|
|
|
|
// $importer in this case contains the contact record for the remote contact joined with the user record of our user.
|
|
|
|
$importer = $r[0];
|
|
|
|
logger("Remote rino version: ".$rino_remote." for ".$importer["url"], LOGGER_DEBUG);
|
|
|
|
if((($writable != (-1)) && ($writable != $importer['writable'])) || ($importer['forum'] != $forum) || ($importer['prv'] != $prv)) {
|
|
q("UPDATE `contact` SET `writable` = %d, forum = %d, prv = %d WHERE `id` = %d",
|
|
intval(($writable == (-1)) ? $importer['writable'] : $writable),
|
|
intval($forum),
|
|
intval($prv),
|
|
intval($importer['id'])
|
|
);
|
|
if($writable != (-1))
|
|
$importer['writable'] = $writable;
|
|
$importer['forum'] = $page;
|
|
}
|
|
|
|
|
|
// if contact's ssl policy changed, update our links
|
|
|
|
fix_contact_ssl_policy($importer,$ssl_policy);
|
|
|
|
logger('dfrn_notify: received notify from ' . $importer['name'] . ' for ' . $importer['username']);
|
|
logger('dfrn_notify: data: ' . $data, LOGGER_DATA);
|
|
|
|
if($dissolve == 1) {
|
|
|
|
/*
|
|
* Relationship is dissolved permanently
|
|
*/
|
|
|
|
require_once('include/Contact.php');
|
|
contact_remove($importer['id']);
|
|
logger('relationship dissolved : ' . $importer['name'] . ' dissolved ' . $importer['username']);
|
|
xml_status(0);
|
|
|
|
}
|
|
|
|
|
|
// If we are setup as a soapbox we aren't accepting input from this person
|
|
// This behaviour is deactivated since it really doesn't make sense to even disallow comments
|
|
// The check if someone is a friend or simply a follower is done in a later place so it needn't to be done here
|
|
//if($importer['page-flags'] == PAGE_SOAPBOX)
|
|
// xml_status(0);
|
|
|
|
$rino = get_config('system','rino_encrypt');
|
|
$rino = intval($rino);
|
|
// use RINO1 if mcrypt isn't installed and RINO2 was selected
|
|
if ($rino == 2 and !function_exists('mcrypt_create_iv')) {
|
|
$rino = 1;
|
|
}
|
|
|
|
logger("Local rino version: ". $rino, LOGGER_DEBUG);
|
|
|
|
if(strlen($key)) {
|
|
|
|
// if local rino is lower than remote rino, abort: should not happen!
|
|
// but only for $remote_rino > 1, because old code did't send rino version
|
|
if ($rino_remote_version > 1 && $rino < $rino_remote) {
|
|
logger("rino version '$rino_remote' is lower than supported '$rino'");
|
|
xml_status(0,"rino version '$rino_remote' is lower than supported '$rino'");
|
|
}
|
|
|
|
$rawkey = hex2bin(trim($key));
|
|
logger('rino: md5 raw key: ' . md5($rawkey));
|
|
$final_key = '';
|
|
|
|
if($dfrn_version >= 2.1) {
|
|
if((($importer['duplex']) && strlen($importer['cprvkey'])) || (! strlen($importer['cpubkey']))) {
|
|
openssl_private_decrypt($rawkey,$final_key,$importer['cprvkey']);
|
|
}
|
|
else {
|
|
openssl_public_decrypt($rawkey,$final_key,$importer['cpubkey']);
|
|
}
|
|
}
|
|
else {
|
|
if((($importer['duplex']) && strlen($importer['cpubkey'])) || (! strlen($importer['cprvkey']))) {
|
|
openssl_public_decrypt($rawkey,$final_key,$importer['cpubkey']);
|
|
}
|
|
else {
|
|
openssl_private_decrypt($rawkey,$final_key,$importer['cprvkey']);
|
|
}
|
|
}
|
|
|
|
#logger('rino: received key : ' . $final_key);
|
|
|
|
switch($rino_remote) {
|
|
case 0:
|
|
case 1:
|
|
// we got a key. old code send only the key, without RINO version.
|
|
// we assume RINO 1 if key and no RINO version
|
|
$data = aes_decrypt(hex2bin($data),$final_key);
|
|
break;
|
|
case 2:
|
|
try {
|
|
$data = Crypto::decrypt(hex2bin($data),$final_key);
|
|
} catch (InvalidCiphertext $ex) { // VERY IMPORTANT
|
|
// Either:
|
|
// 1. The ciphertext was modified by the attacker,
|
|
// 2. The key is wrong, or
|
|
// 3. $ciphertext is not a valid ciphertext or was corrupted.
|
|
// Assume the worst.
|
|
logger('The ciphertext has been tampered with!');
|
|
xml_status(0,'The ciphertext has been tampered with!');
|
|
} catch (Ex\CryptoTestFailed $ex) {
|
|
logger('Cannot safely perform dencryption');
|
|
xml_status(0,'CryptoTestFailed');
|
|
} catch (Ex\CannotPerformOperation $ex) {
|
|
logger('Cannot safely perform decryption');
|
|
xml_status(0,'Cannot safely perform decryption');
|
|
}
|
|
break;
|
|
default:
|
|
logger("rino: invalid sent verision '$rino_remote'");
|
|
xml_status(0);
|
|
}
|
|
|
|
|
|
logger('rino: decrypted data: ' . $data, LOGGER_DATA);
|
|
}
|
|
|
|
$ret = dfrn::import($data, $importer);
|
|
xml_status($ret);
|
|
|
|
// NOTREACHED
|
|
}
|
|
|
|
|
|
function dfrn_notify_content(App $a) {
|
|
|
|
if(x($_GET,'dfrn_id')) {
|
|
|
|
// initial communication from external contact, $direction is their direction.
|
|
// If this is a duplex communication, ours will be the opposite.
|
|
|
|
$dfrn_id = notags(trim($_GET['dfrn_id']));
|
|
$dfrn_version = (float) $_GET['dfrn_version'];
|
|
$rino_remote = ((x($_GET,'rino')) ? intval($_GET['rino']) : 0);
|
|
$type = "";
|
|
$last_update = "";
|
|
|
|
logger('dfrn_notify: new notification dfrn_id=' . $dfrn_id);
|
|
|
|
$direction = (-1);
|
|
if(strpos($dfrn_id,':') == 1) {
|
|
$direction = intval(substr($dfrn_id,0,1));
|
|
$dfrn_id = substr($dfrn_id,2);
|
|
}
|
|
|
|
$hash = random_string();
|
|
|
|
$status = 0;
|
|
|
|
$r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
|
|
|
|
$r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
|
|
VALUES( '%s', '%s', %d, '%s', '%s' ) ",
|
|
dbesc($hash),
|
|
dbesc($dfrn_id),
|
|
intval(time() + 90 ),
|
|
dbesc($type),
|
|
dbesc($last_update)
|
|
);
|
|
|
|
logger('dfrn_notify: challenge=' . $hash, LOGGER_DEBUG);
|
|
|
|
$sql_extra = '';
|
|
switch($direction) {
|
|
case (-1):
|
|
$sql_extra = sprintf(" AND ( `issued-id` = '%s' OR `dfrn-id` = '%s' ) ", dbesc($dfrn_id), dbesc($dfrn_id));
|
|
$my_id = $dfrn_id;
|
|
break;
|
|
case 0:
|
|
$sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
|
|
$my_id = '1:' . $dfrn_id;
|
|
break;
|
|
case 1:
|
|
$sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
|
|
$my_id = '0:' . $dfrn_id;
|
|
break;
|
|
default:
|
|
$status = 1;
|
|
break; // NOTREACHED
|
|
}
|
|
|
|
$r = q("SELECT `contact`.*, `user`.`nickname`, `user`.`page-flags` FROM `contact` LEFT JOIN `user` ON `user`.`uid` = `contact`.`uid`
|
|
WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0 AND `user`.`nickname` = '%s'
|
|
AND `user`.`account_expired` = 0 AND `user`.`account_removed` = 0 $sql_extra LIMIT 1",
|
|
dbesc($a->argv[1])
|
|
);
|
|
|
|
if (! dbm::is_result($r)) {
|
|
$status = 1;
|
|
}
|
|
|
|
logger("Remote rino version: ".$rino_remote." for ".$r[0]["url"], LOGGER_DEBUG);
|
|
|
|
$challenge = '';
|
|
$encrypted_id = '';
|
|
$id_str = $my_id . '.' . mt_rand(1000,9999);
|
|
|
|
$prv_key = trim($r[0]['prvkey']);
|
|
$pub_key = trim($r[0]['pubkey']);
|
|
$dplx = intval($r[0]['duplex']);
|
|
|
|
if ((($dplx) && (strlen($prv_key))) || ((strlen($prv_key)) && (!(strlen($pub_key))))) {
|
|
openssl_private_encrypt($hash, $challenge, $prv_key);
|
|
openssl_private_encrypt($id_str, $encrypted_id, $prv_key);
|
|
} elseif (strlen($pub_key)) {
|
|
openssl_public_encrypt($hash, $challenge, $pub_key);
|
|
openssl_public_encrypt($id_str, $encrypted_id, $pub_key);
|
|
} else {
|
|
/// @TODO these kind of else-blocks are making the code harder to understand
|
|
$status = 1;
|
|
}
|
|
|
|
$challenge = bin2hex($challenge);
|
|
$encrypted_id = bin2hex($encrypted_id);
|
|
|
|
|
|
$rino = get_config('system','rino_encrypt');
|
|
$rino = intval($rino);
|
|
// use RINO1 if mcrypt isn't installed and RINO2 was selected
|
|
/// @TODO Define a code-standard: and/AND/&& are around
|
|
if ($rino == 2 and !function_exists('mcrypt_create_iv')) {
|
|
$rino = 1;
|
|
}
|
|
|
|
logger("Local rino version: ". $rino, LOGGER_DEBUG);
|
|
|
|
// if requested rino is lower than enabled local rino, lower local rino version
|
|
// if requested rino is higher than enabled local rino, reply with local rino
|
|
if ($rino_remote < $rino) {
|
|
$rino = $rino_remote;
|
|
}
|
|
|
|
if((($r[0]['rel']) && ($r[0]['rel'] != CONTACT_IS_SHARING)) || ($r[0]['page-flags'] == PAGE_COMMUNITY)) {
|
|
$perm = 'rw';
|
|
} else {
|
|
$perm = 'r';
|
|
}
|
|
|
|
header("Content-type: text/xml");
|
|
|
|
echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
|
|
. '<dfrn_notify>' . "\r\n"
|
|
. "\t" . '<status>' . $status . '</status>' . "\r\n"
|
|
. "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n"
|
|
. "\t" . '<rino>' . $rino . '</rino>' . "\r\n"
|
|
. "\t" . '<perm>' . $perm . '</perm>' . "\r\n"
|
|
. "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n"
|
|
. "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
|
|
. '</dfrn_notify>' . "\r\n" ;
|
|
|
|
killme();
|
|
}
|
|
|
|
}
|