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significantly enhanced profile security

This commit is contained in:
Friendika 2010-12-07 19:40:12 -08:00
parent 5763d31b4f
commit e241c401cf
3 changed files with 198 additions and 63 deletions
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24
include/dba.php
View File

@ -1,12 +1,15 @@
<?php
// MySQL database class
//
// For debugging, insert 'dbg(x);' anywhere in the program flow.
// x = 1: display db success/failure following content
// x = 2: display full queries following content
// x = 3: display full queries using echo; which will mess up display
// really bad but will return output in stubborn cases.
/**
*
* MySQL database class
*
* For debugging, insert 'dbg(1);' anywhere in the program flow.
* dbg(0); will turn it off. Logging is performed at LOGGER_DATA level.
* When logging, all binary info is converted to text and html entities are escaped so that
* the debugging stream is safe to view within both terminals and web pages.
*
*/
if(! class_exists('dba')) {
class dba {
@ -51,6 +54,13 @@ class dba {
logger('dba: ' . $str );
}
else {
/*
* If dbfail.out exists, we will write any failed calls directly to it,
* regardless of any logging that may or may nor be in effect.
* These usually indicate SQL syntax errors that need to be resolved.
*/
if($result === false) {
logger('dba: ' . printable($sql) . ' returned false.');
if(file_exists('dbfail.out'))

138
mod/dfrn_poll.php
View File

@ -7,12 +7,12 @@ require_once('include/auth.php');
function dfrn_poll_init(&$a) {
$dfrn_id = ((x($_GET,'dfrn_id')) ? $_GET['dfrn_id'] : '');
$type = ((x($_GET,'type')) ? $_GET['type'] : '');
$type = ((x($_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')) ? intval($_GET['sec']) : 0);
$dfrn_version = ((x($_GET,'dfrn_version')) ? (float) $_GET['dfrn_version'] : 0);
$challenge = ((x($_GET,'challenge')) ? $_GET['challenge'] : '');
$sec = ((x($_GET,'sec')) ? $_GET['sec'] : '');
$dfrn_version = ((x($_GET,'dfrn_version')) ? (float) $_GET['dfrn_version'] : 2.0);
$direction = (-1);
@ -29,7 +29,7 @@ function dfrn_poll_init(&$a) {
killme();
}
if((isset($type)) && ($type === 'profile')) {
if(($type === 'profile') && (! strlen($sec))) {
$sql_extra = '';
switch($direction) {
@ -61,6 +61,8 @@ function dfrn_poll_init(&$a) {
$s = fetch_url($r[0]['poll'] . '?dfrn_id=' . $my_id . '&type=profile-check');
logger("dfrn_poll: old profile returns " . $s, LOGGER_DATA);
if(strlen($s)) {
$xml = simplexml_load_string($s);
@ -85,7 +87,62 @@ function dfrn_poll_init(&$a) {
}
if((isset($type)) && ($type === 'profile-check')) {
if($type === 'profile-check') {
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);
// 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);
}
$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 != $orig_id) {
// did not decode properly - cannot trust this site
xml_status(3);
}
header("Content-type: text/xml");
echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
killme();
// NOTREACHED
}
else {
// old protocol
switch($direction) {
case 1:
@ -97,6 +154,8 @@ function dfrn_poll_init(&$a) {
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));
@ -107,7 +166,7 @@ function dfrn_poll_init(&$a) {
xml_status(0);
return; // NOTREACHED
}
}
}
@ -118,7 +177,7 @@ function dfrn_poll_post(&$a) {
$dfrn_id = ((x($_POST,'dfrn_id')) ? $_POST['dfrn_id'] : '');
$challenge = ((x($_POST,'challenge')) ? $_POST['challenge'] : '');
$url = ((x($_POST,'url')) ? $_POST['url'] : '');
$dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 0);
$dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
$direction = (-1);
if(strpos($dfrn_id,':') == 1) {
@ -216,8 +275,9 @@ function dfrn_poll_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'] : '');
$dfrn_version = ((x($_GET,'dfrn_version')) ? (float) $_GET['dfrn_version'] : 2.0);
$sec = ((x($_GET,'sec')) ? intval($_GET['sec']) : 0);
$direction = (-1);
if(strpos($dfrn_id,':') == 1) {
@ -234,6 +294,7 @@ function dfrn_poll_content(&$a) {
$r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
if($type !== 'profile') {
$r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
VALUES( '%s', '%s', '%s', '%s', '%s' ) ",
dbesc($hash),
@ -242,10 +303,13 @@ function dfrn_poll_content(&$a) {
dbesc($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 = $dfrn_id;
break;
@ -262,7 +326,12 @@ function dfrn_poll_content(&$a) {
break; // NOTREACHED
}
$r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 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' $sql_extra LIMIT 1",
dbesc($a->argv[1])
);
if(count($r)) {
@ -270,7 +339,6 @@ function dfrn_poll_content(&$a) {
$encrypted_id = '';
$id_str = $my_id . '.' . mt_rand(1000,9999);
if($r[0]['duplex'] && strlen($r[0]['pubkey'])) {
openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
@ -287,6 +355,50 @@ function dfrn_poll_content(&$a) {
$status = 1;
}
if(($type === 'profile') && (strlen($sec))) {
// URL reply
$s = fetch_url($r[0]['poll']
. '?dfrn_id=' . $encrypted_id
. '&type=profile-check'
. '&dfrn_version=' . DFRN_PROTOCOL_VERSION
. '&challenge=' . $challenge
. '&sec=' . $sec
);
logger("dfrn_poll: sec profile: " . $s, LOGGER_DATA);
if(strlen($s) && strstr($s,'<?xml')) {
$xml = simplexml_load_string($s);
logger('dfrn_poll: profile: parsed xml: ' . print_r($xml,true), LOGGER_DATA);
logger('dfrn_poll: secure profile: challenge: ' . $xml->challenge . ' expecting ' . $hash);
logger('dfrn_poll: secure profile: sec: ' . $xml->sec . ' expecting ' . $sec);
if(((int) $xml->status == 0) && ($xml->challenge == $hash) && ($xml->sec == $sec)) {
$_SESSION['authenticated'] = 1;
$_SESSION['visitor_id'] = $r[0]['id'];
notice( $r[0]['username'] . t(' welcomes ') . $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/' . $profile);
}
goaway($a->get_baseurl());
// NOTREACHED
}
else {
// XML reply
header("Content-type: text/xml");
echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
. '<dfrn_poll>' . "\r\n"
@ -296,6 +408,8 @@ function dfrn_poll_content(&$a) {
. "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
. '</dfrn_poll>' . "\r\n" ;
killme();
// NOTREACHED
}
}
}

23
mod/redir.php
View File

@ -4,10 +4,13 @@ function redir_init(&$a) {
if((! local_user()) || (! ($a->argc == 2)) || (! intval($a->argv[1])))
goaway($a->get_baseurl());
$cid = $a->argv[1];
$r = q("SELECT `network`, `issued-id`, `dfrn-id`, `duplex`, `poll` FROM `contact` WHERE `id` = %d AND `uid` = %d LIMIT 1",
intval($a->argv[1]),
intval($cid),
intval(local_user())
);
if((! count($r)) || ($r[0]['network'] !== 'dfrn'))
goaway($a->get_baseurl());
@ -21,12 +24,20 @@ function redir_init(&$a) {
$orig_id = $r[0]['dfrn-id'];
$dfrn_id = '0:' . $orig_id;
}
q("INSERT INTO `profile_check` ( `uid`, `dfrn_id`, `expire`)
VALUES( %d, '%s', %d )",
intval($_SESSION['uid']),
$sec = random_string();
q("INSERT INTO `profile_check` ( `uid`, `cid`, `dfrn_id`, `sec`, `expire`)
VALUES( %d, %s, '%s', '%s', %d )",
intval(local_user()),
intval($cid),
dbesc($dfrn_id),
intval(time() + 45));
dbesc($sec),
intval(time() + 45)
);
goaway ($r[0]['poll'] . '?dfrn_id=' . $dfrn_id
. '&dfrn_version=' . DFRN_PROTOCOL_VERSION . '&type=profile&sec=1');
// . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . '&type=profile');
. '&dfrn_version=' . DFRN_PROTOCOL_VERSION . '&type=profile&sec=' . $sec);
}