diff options
| -rw-r--r-- | mod/auth.php | 517 |
1 files changed, 517 insertions, 0 deletions
diff --git a/mod/auth.php b/mod/auth.php new file mode 100644 index 000000000..dae8a0e16 --- /dev/null +++ b/mod/auth.php @@ -0,0 +1,517 @@ +<?php + + + +require_once('include/items.php'); +require_once('include/auth.php'); + + +function auth_init(&$a) { + + + $destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url'] : ''); + $challenge = ((x($_GET,'challenge')) ? $_GET['challenge'] : ''); + $sec = ((x($_GET,'sec')) ? $_GET['sec'] : ''); + + $api_version = ((x($_GET,'api_version')) ? (float) $_GET['api_version'] : 1.0); + + + if(($type === 'profile') && (! strlen($sec))) { + + $sql_extra = ''; + switch($direction) { + case (-1): + $sql_extra = sprintf(" AND ( `dfrn_id` = '%s' OR `issued_id` = '%s' ) ", dbesc($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: + goaway(z_root()); + break; // NOTREACHED + } + + $r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname` + FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid` + WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0 + AND `user`.`nickname` = '%s' $sql_extra LIMIT 1", + dbesc($a->argv[1]) + ); + + if(count($r)) { + + $s = fetch_url($r[0]['poll'] . '?dfrn_id=' . $my_id . '&type=profile-check'); + + logger("dfrn_poll: old profile returns " . $s, LOGGER_DATA); + + if(strlen($s)) { + + $xml = parse_xml_string($s); + + if((int) $xml->status == 1) { + $_SESSION['authenticated'] = 1; + if(! x($_SESSION,'remote')) + $_SESSION['remote'] = array(); + + $_SESSION['remote'][] = array('cid' => $r[0]['id'],'uid' => $r[0]['uid'],'url' => $r[0]['url']); + + $_SESSION['visitor_id'] = $r[0]['id']; + $_SESSION['visitor_home'] = $r[0]['url']; + $_SESSION['visitor_handle'] = $r[0]['addr']; + $_SESSION['visitor_visiting'] = $r[0]['uid']; + info( sprintf(t('%s welcomes %s'), $r[0]['username'] , $r[0]['name']) . EOL); + // Visitors get 1 day session. + $session_id = session_id(); + $expire = time() + 86400; + q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1", + dbesc($expire), + dbesc($session_id) + ); + } + } + $profile = $r[0]['nickname']; + goaway((strlen($destination_url)) ? $destination_url : $a->get_baseurl() . '/profile/' . $profile); + } + goaway(z_root()); + + } + + if($type === 'profile-check' && $dfrn_version < 2.2 ) { + + if((strlen($challenge)) && (strlen($sec))) { + + q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time())); + $r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1", + dbesc($sec) + ); + if(! count($r)) { + xml_status(3, 'No ticket'); + // NOTREACHED + } + $orig_id = $r[0]['dfrn_id']; + if(strpos($orig_id, ':')) + $orig_id = substr($orig_id,2); + + $c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1", + intval($r[0]['cid']) + ); + if(! count($c)) { + xml_status(3, 'No profile'); + } + $contact = $c[0]; + + $sent_dfrn_id = hex2bin($dfrn_id); + $challenge = hex2bin($challenge); + + $final_dfrn_id = ''; + + if(($contact['duplex']) && strlen($contact['prvkey'])) { + openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']); + openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']); + } + else { + openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']); + openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']); + } + + $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.')); + + if(strpos($final_dfrn_id,':') == 1) + $final_dfrn_id = substr($final_dfrn_id,2); + + if($final_dfrn_id != $orig_id) { + logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG); + // did not decode properly - cannot trust this site + xml_status(3, 'Bad decryption'); + } + + header("Content-type: text/xml"); + echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>"; + killme(); + // NOTREACHED + } + else { + // old protocol + + switch($direction) { + case 1: + $dfrn_id = '0:' . $dfrn_id; + break; + case 0: + $dfrn_id = '1:' . $dfrn_id; + break; + default: + break; + } + + + q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time())); + $r = q("SELECT * FROM `profile_check` WHERE `dfrn_id` = '%s' ORDER BY `expire` DESC", + dbesc($dfrn_id)); + if(count($r)) { + xml_status(1); + return; // NOTREACHED + } + xml_status(0); + return; // NOTREACHED + } + } + +} + + + +function auth_post(&$a) { + + $dfrn_id = ((x($_POST,'dfrn_id')) ? $_POST['dfrn_id'] : ''); + $challenge = ((x($_POST,'challenge')) ? $_POST['challenge'] : ''); + $url = ((x($_POST,'url')) ? $_POST['url'] : ''); + $sec = ((x($_POST,'sec')) ? $_POST['sec'] : ''); + $ptype = ((x($_POST,'type')) ? $_POST['type'] : ''); + $api_version = ((x($_POST,'api_version')) ? (float) $_POST['api_version'] : 1.0); + $perm = ((x($_POST,'perm')) ? $_POST['perm'] : 'r'); + + if($ptype === 'profile-check') { + + if((strlen($challenge)) && (strlen($sec))) { + + logger('dfrn_poll: POST: profile-check'); + + q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time())); + $r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1", + dbesc($sec) + ); + if(! count($r)) { + xml_status(3, 'No ticket'); + // NOTREACHED + } + $orig_id = $r[0]['dfrn_id']; + if(strpos($orig_id, ':')) + $orig_id = substr($orig_id,2); + + $c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1", + intval($r[0]['cid']) + ); + if(! count($c)) { + xml_status(3, 'No profile'); + } + $contact = $c[0]; + + $sent_dfrn_id = hex2bin($dfrn_id); + $challenge = hex2bin($challenge); + + $final_dfrn_id = ''; + + if(($contact['duplex']) && strlen($contact['prvkey'])) { + openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']); + openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']); + } + else { + openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']); + openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']); + } + + $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.')); + + if(strpos($final_dfrn_id,':') == 1) + $final_dfrn_id = substr($final_dfrn_id,2); + + if($final_dfrn_id != $orig_id) { + logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG); + // did not decode properly - cannot trust this site + xml_status(3, 'Bad decryption'); + } + + header("Content-type: text/xml"); + echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>"; + killme(); + // NOTREACHED + } + + } + + $direction = (-1); + if(strpos($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($challenge) + ); + + if(! count($r)) + killme(); + + $type = $r[0]['type']; + $last_update = $r[0]['last_update']; + + $r = q("DELETE FROM `challenge` WHERE `dfrn_id` = '%s' AND `challenge` = '%s' LIMIT 1", + dbesc($dfrn_id), + dbesc($challenge) + ); + + + $sql_extra = ''; + switch($direction) { + case (-1): + $sql_extra = sprintf(" AND `issued_id` = '%s' ", dbesc($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: + goaway(z_root()); + break; // NOTREACHED + } + + + $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 1"); + + + if(! count($r)) + killme(); + + $contact = $r[0]; + $owner_uid = $r[0]['uid']; + $contact_id = $r[0]['id']; + + + if($type === 'reputation' && strlen($url)) { + $r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1", + dbesc($url), + intval($owner_uid) + ); + $reputation = 0; + $text = ''; + + if(count($r)) { + $reputation = $r[0]['rating']; + $text = $r[0]['reason']; + + if($r[0]['id'] == $contact_id) { // inquiring about own reputation not allowed + $reputation = 0; + $text = ''; + } + } + + echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?> + <reputation> + <url>$url</url> + <rating>$reputation</rating> + <description>$text</description> + </reputation> + "; + killme(); + // NOTREACHED + } + else { + + // Update the writable flag if it changed + logger('dfrn_poll: post request feed: ' . print_r($_POST,true),LOGGER_DATA); + if($dfrn_version >= 2.21) { + if($perm === 'rw') + $writable = 1; + else + $writable = 0; + + if($writable != $contact['writable']) { + q("UPDATE `contact` SET `writable` = %d WHERE `id` = %d LIMIT 1", + intval($writable), + intval($contact_id) + ); + } + } + + header("Content-type: application/atom+xml"); + $o = get_feed_for($a,$dfrn_id, $a->argv[1], $last_update, $direction); + echo $o; + killme(); + + } +} + +function auth_content(&$a) { + + $dfrn_id = ((x($_GET,'dfrn_id')) ? $_GET['dfrn_id'] : ''); + $type = ((x($_GET,'type')) ? $_GET['type'] : 'data'); + $last_update = ((x($_GET,'last_update')) ? $_GET['last_update'] : ''); + $destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url'] : ''); + $sec = ((x($_GET,'sec')) ? $_GET['sec'] : ''); + $api_version = ((x($_GET,'api_version')) ? (float) $_GET['api_version'] : 1.0); + $perm = ((x($_GET,'perm')) ? $_GET['perm'] : 'r'); + + $direction = (-1); + if(strpos($dfrn_id,':') == 1) { + $direction = intval(substr($dfrn_id,0,1)); + $dfrn_id = substr($dfrn_id,2); + } + + + if($dfrn_id != '') { + // initial communication from external contact + $hash = random_string(); + + $status = 0; + + $r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time())); + + if($type !== 'profile') { + $r = q("INSERT INTO `challenge` ( `challenge`, `dfrn_id`, `expire` , `type`, `last_update` ) + VALUES( '%s', '%s', '%s', '%s', '%s' ) ", + dbesc($hash), + dbesc($dfrn_id), + intval(time() + 60 ), + dbesc($type), + dbesc($last_update) + ); + } + $sql_extra = ''; + switch($direction) { + case (-1): + if($type === 'profile') + $sql_extra = sprintf(" AND ( `dfrn_id` = '%s' OR `issued_id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id)); + else + $sql_extra = sprintf(" AND `issued_id` = '%s' ", dbesc($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: + goaway(z_root()); + break; // NOTREACHED + } + + $nickname = $a->argv[1]; + + $r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname` + FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid` + WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0 + AND `user`.`nickname` = '%s' $sql_extra LIMIT 1", + dbesc($nickname) + ); + + if(count($r)) { + + $challenge = ''; + $encrypted_id = ''; + $id_str = $my_id . '.' . mt_rand(1000,9999); + + if(($r[0]['duplex'] && strlen($r[0]['pubkey'])) || (! strlen($r[0]['prvkey']))) { + openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']); + openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']); + } + else { + openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']); + openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']); + } + + $challenge = bin2hex($challenge); + $encrypted_id = bin2hex($encrypted_id); + } + else { + $status = 1; + $challenge = ''; + $encrypted_id = ''; + } + + if(strlen($sec)) { + + // URL reply + + $s = post_url($r[0]['poll'], array( + 'dfrn_id' => $encrypted_id, + 'type' => 'profile-check', + 'dfrn_version' => DFRN_PROTOCOL_VERSION, + 'challenge' => $challenge, + 'sec' => $sec + )); + + $profile = ((count($r) && $r[0]['nickname']) ? $r[0]['nickname'] : $nickname); + + switch($destination_url) { + case 'profile': + $dest = $a->get_baseurl() . '/profile/' . $profile . '?tab=profile'; + break; + case 'photos': + $dest = $a->get_baseurl() . '/photos/' . $profile; + break; + case 'status': + case '': + $dest = $a->get_baseurl() . '/profile/' . $profile; + break; + default: + $dest = $destination_url; + break; + } + + logger("mod-auth: sec profile: " . $s, LOGGER_DATA); + + if(strlen($s)) { + + $j = json_decode($s); + + logger('mod-auth: profile: parsed json: ' . print_r($j,true), LOGGER_DATA); + logger('mod-auth: secure profile: challenge: ' . $j->challenge . ' expecting ' . $hash); + logger('mod-auth: secure profile: sec: ' . $j->sec . ' expecting ' . $sec); + + + if(((int) $j->status == 0) && ($j->challenge == $hash) && ($j->sec == $sec)) { + $_SESSION['authenticated'] = 1; + if(! x($_SESSION,'remote')) + $_SESSION['remote'] = array(); + $_SESSION['remote'][] = array('cid' => $r[0]['id'],'uid' => $r[0]['uid'],'url' => $r[0]['url']); + $_SESSION['visitor_id'] = $r[0]['id']; + $_SESSION['visitor_home'] = $r[0]['url']; + $_SESSION['visitor_visiting'] = $r[0]['uid']; + info( sprintf(t('%s welcomes %s'), $r[0]['username'] , $r[0]['name']) . EOL); + // Visitors get 1 day session. + $session_id = session_id(); + $expire = time() + 86400; + q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1", + dbesc($expire), + dbesc($session_id) + ); + } + + goaway($dest); + // NOTREACHED + + } + else { + // XML reply + header("Content-type: text/xml"); + echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n" + . '<dfrn_poll>' . "\r\n" + . "\t" . '<status>' . $status . '</status>' . "\r\n" + . "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n" + . "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n" + . "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n" + . '</dfrn_poll>' . "\r\n" ; + killme(); + // NOTREACHED + } + } +} +} + |