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authorZach Prezkuta <fermion@gmx.com>2012-05-25 18:26:09 -0600
committerZach Prezkuta <fermion@gmx.com>2012-06-03 14:53:29 -0600
commit1fe1ac022f0755d73c62bac86f1b54fdbd6b50f5 (patch)
tree8e05ab1ab3d6191191d6827c32aefdcc39790ee4 /include/diaspora.php
parent959b264c440e0c39ec235defdec42cb485069f18 (diff)
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Support relayable_retractions that are relayed to us by the top-level post owner
Diffstat (limited to 'include/diaspora.php')
-rw-r--r--include/diaspora.php46
1 files changed, 37 insertions, 9 deletions
diff --git a/include/diaspora.php b/include/diaspora.php
index f7c2c5e8e..8b8050a61 100644
--- a/include/diaspora.php
+++ b/include/diaspora.php
@@ -83,6 +83,9 @@ function diaspora_dispatch($importer,$msg) {
elseif($xmlbase->signed_retraction) {
$ret = diaspora_signed_retraction($importer,$xmlbase->signed_retraction,$msg);
}
+ elseif($xmlbase->relayable_retraction) {
+ $ret = diaspora_signed_retraction($importer,$xmlbase->relayable_retraction,$msg);
+ }
elseif($xmlbase->photo) {
$ret = diaspora_photo($importer,$xmlbase->photo,$msg);
}
@@ -677,7 +680,7 @@ function diaspora_post($importer,$xml) {
return;
}
- // allocate a guid on our system - we aren't fixing any collisions.
+ // allocate a guid on our system - we aren't fixing any collisions.
// we're ignoring them
$g = q("select * from guid where guid = '%s' limit 1",
@@ -844,7 +847,7 @@ function diaspora_reshare($importer,$xml) {
$prefix = '&#x2672; ' . $details . "\n";
- // allocate a guid on our system - we aren't fixing any collisions.
+ // allocate a guid on our system - we aren't fixing any collisions.
// we're ignoring them
$g = q("select * from guid where guid = '%s' limit 1",
@@ -948,7 +951,7 @@ function diaspora_asphoto($importer,$xml) {
return;
}
- // allocate a guid on our system - we aren't fixing any collisions.
+ // allocate a guid on our system - we aren't fixing any collisions.
// we're ignoring them
$g = q("select * from guid where guid = '%s' limit 1",
@@ -1783,28 +1786,53 @@ function diaspora_signed_retraction($importer,$xml,$msg) {
$type = notags(unxmlify($xml->target_type));
$sig = notags(unxmlify($xml->target_author_signature));
+ $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : '');
+
$contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
if(! $contact) {
logger('diaspora_signed_retraction: no contact');
return;
}
- // this may not yet work for comments. Need to see how the relaying works
- // and figure out who signs it.
-
$signed_data = $guid . ';' . $type ;
$sig = base64_decode($sig);
- $key = $msg['key'];
+ if(strcasecmp($diaspora_handle,$msg['author']) == 0) {
+ $person = $contact;
+ $key = $msg['key'];
+ }
+ else {
+ $person = find_diaspora_person_by_handle($diaspora_handle);
+
+ if(is_array($person) && x($person,'pubkey'))
+ $key = $person['pubkey'];
+ else {
+ logger('diaspora_signed_retraction: unable to find author details');
+ return;
+ }
+ }
if(! rsa_verify($signed_data,$sig,$key,'sha256')) {
- logger('diaspora_signed_retraction: owner verification failed.' . print_r($msg,true));
+ logger('diaspora_signed_retraction: retraction-owner verification failed.' . print_r($msg,true));
return;
}
- if($type === 'StatusMessage') {
+ if($parent_author_signature) {
+ $owner_signed_data = $guid . ';' . $type ;
+
+ $parent_author_signature = base64_decode($parent_author_signature);
+
+ $key = $msg['key'];
+
+ if(! rsa_verify($owner_signed_data,$parent_author_signature,$key,'sha256')) {
+ logger('diaspora_signed_retraction: failed to verify person relaying the retraction (e.g. owner of a post relaying a retracted comment');
+ return;
+ }
+ }
+
+ if($type === 'StatusMessage' || $type === 'Comment') {
$r = q("select * from item where guid = '%s' and uid = %d and not file like '%%[%%' limit 1",
dbesc($guid),
intval($importer['uid'])