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authorFriendika <info@friendika.com>2010-12-07 19:40:12 -0800
committerFriendika <info@friendika.com>2010-12-07 19:40:12 -0800
commite241c401cf21108f39f67e54f64f50ad139af221 (patch)
tree287e6568475d0a5b168b1ac8ee9c1883838a915a /mod
parent5763d31b4f213fbb2eea4d366a9c7ad534a7f1ec (diff)
downloadvolse-hubzilla-e241c401cf21108f39f67e54f64f50ad139af221.tar.gz
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significantly enhanced profile security
Diffstat (limited to 'mod')
-rw-r--r--mod/dfrn_poll.php214
-rw-r--r--mod/redir.php23
2 files changed, 181 insertions, 56 deletions
diff --git a/mod/dfrn_poll.php b/mod/dfrn_poll.php
index de3d00aea..20fdc8f79 100644
--- a/mod/dfrn_poll.php
+++ b/mod/dfrn_poll.php
@@ -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);
@@ -85,30 +87,87 @@ function dfrn_poll_init(&$a) {
}
- if((isset($type)) && ($type === 'profile-check')) {
+ if($type === 'profile-check') {
- switch($direction) {
- case 1:
- $dfrn_id = '0:' . $dfrn_id;
- break;
- case 0:
- $dfrn_id = '1:' . $dfrn_id;
- break;
- default:
- break;
+ if((strlen($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
}
- 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($r)) {
- xml_status(1);
+ else {
+ // old protocol
+
+ switch($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($r)) {
+ xml_status(1);
+ return; // NOTREACHED
+ }
+ xml_status(0);
return; // NOTREACHED
}
- xml_status(0);
- return; // NOTREACHED
}
-
}
@@ -118,7 +177,7 @@ function dfrn_poll_post(&$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) {
@@ -213,11 +272,12 @@ function dfrn_poll_post(&$a) {
function dfrn_poll_content(&$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'] : '');
- $dfrn_version = ((x($_GET,'dfrn_version')) ? (float) $_GET['dfrn_version'] : 2.0);
- $sec = ((x($_GET,'sec')) ? intval($_GET['sec']) : 0);
+ $dfrn_id = ((x($_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);
$direction = (-1);
if(strpos($dfrn_id,':') == 1) {
@@ -234,19 +294,23 @@ function dfrn_poll_content(&$a) {
$r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
- $r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
- VALUES( '%s', '%s', '%s', '%s', '%s' ) ",
- dbesc($hash),
- dbesc($dfrn_id),
- intval(time() + 60 ),
- dbesc($type),
- dbesc($last_update)
- );
-
+ if($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):
- $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
+ 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 = $dfrn_id;
break;
case 0:
@@ -262,7 +326,12 @@ function dfrn_poll_content(&$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,$r[0]['pubkey']);
@@ -287,15 +355,61 @@ function dfrn_poll_content(&$a) {
$status = 1;
}
- 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>' . $challenge . '</challenge>' . "\r\n"
- . '</dfrn_poll>' . "\r\n" ;
- killme();
+ if(($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"
+ . "\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>' . $challenge . '</challenge>' . "\r\n"
+ . '</dfrn_poll>' . "\r\n" ;
+ killme();
+ // NOTREACHED
+ }
}
}
diff --git a/mod/redir.php b/mod/redir.php
index f95c52c96..cc58b9cd1 100644
--- a/mod/redir.php
+++ b/mod/redir.php
@@ -4,10 +4,13 @@ function redir_init(&$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);
}