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Implement relaying of relayable_retractions

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Also: some whitespace cleanup, fix Diaspora parent DB query
This commit is contained in:
Zach Prezkuta
2012-05-31 19:40:12 -06:00
parent 1fe1ac022f
commit c0af6dbb1a
8 changed files with 194 additions and 43 deletions
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151
include/diaspora.php
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@@ -680,7 +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
$g = q("select * from guid where guid = '%s' limit 1",
@@ -847,7 +847,7 @@ function diaspora_reshare($importer,$xml) {
$prefix = '♲ ' . $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
$g = q("select * from guid where guid = '%s' limit 1",
@@ -951,7 +951,7 @@ function diaspora_asphoto($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
$g = q("select * from guid where guid = '%s' limit 1",
@@ -1168,7 +1168,22 @@ function diaspora_comment($importer,$xml,$msg) {
);
}
if(($parent_item['origin']) && (! $parent_author_signature)) {
if(($parent_item['origin']) && (! $parent_author_signature)) { if(($parent_item['origin']) && (! $parent_author_signature)) {
q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
intval($message_id),
dbesc($author_signed_data),
dbesc(base64_encode($author_signature)),
dbesc($diaspora_handle)
);
// if the message isn't already being relayed, notify others
// the existence of parent_author_signature means the parent_author or owner
// is already relaying.
proc_run('php','include/notifier.php','comment',$message_id);
}
q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
intval($message_id),
dbesc($author_signed_data),
@@ -1797,7 +1812,7 @@ function diaspora_signed_retraction($importer,$xml,$msg) {
$signed_data = $guid . ';' . $type ;
$sig = base64_decode($sig);
$sig_decode = base64_decode($sig);
if(strcasecmp($diaspora_handle,$msg['author']) == 0) {
$person = $contact;
@@ -1814,22 +1829,21 @@ function diaspora_signed_retraction($importer,$xml,$msg) {
}
}
if(! rsa_verify($signed_data,$sig,$key,'sha256')) {
if(! rsa_verify($signed_data,$sig_decode,$key,'sha256')) {
logger('diaspora_signed_retraction: retraction-owner verification failed.' . print_r($msg,true));
return;
}
if($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')) {
if(! rsa_verify($signed_data,$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' || $type === 'Comment') {
@@ -1839,10 +1853,36 @@ function diaspora_signed_retraction($importer,$xml,$msg) {
);
if(count($r)) {
if(link_compare($r[0]['author-link'],$contact['url'])) {
q("update item set `deleted` = 1, `changed` = '%s' where `id` = %d limit 1",
q("update item set `deleted` = 1, `edited` = '%s', `changed` = '%s', `body` = '' , `title` = '' where `id` = %d limit 1",
dbesc(datetime_convert()),
intval($r[0]['id'])
);
// Now check if the retraction needs to be relayed by us
//
// The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always
// return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent.
// The only item with `parent` and `id` as the parent id is the parent item.
$p = q("select origin from item where parent = %d and id = %d limit 1",
$r[0]['parent'],
$r[0]['parent']
);
if(count($p)) {
if(($p[0]['origin']) && (! $parent_author_signature)) {
q("insert into sign (`retract_iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
$r[0]['id'],
dbesc($signed_data),
dbesc($sig),
dbesc($diaspora_handle)
);
// the existence of parent_author_signature would have meant the parent_author or owner
// is already relaying.
logger('diaspora_signed_retraction: relaying relayable_retraction');
proc_run('php','include/notifier.php','relayable_retraction',$r[0]['id']);
}
}
}
}
}
@@ -2136,10 +2176,28 @@ function diaspora_send_followup($item,$owner,$contact,$public_batch = false) {
function diaspora_send_relay($item,$owner,$contact,$public_batch = false) {
// I think the first comment or like on a post whose home is our Friendica server is saved as an item
// as the top-level post owner's contact for writer of the comment or post. Thus, the "uid"
// on the item is `user`.`id` of the top-level post owner. That user is passed to this function
// as "$owner."
//
// I'm assuming for now that "$owner" will be the user of the top-level post for retractions too. Be
// aware that another reasonable possibility is that it's the "$owner" of the deleted comment.
// TODO
// CHECK 1. If we receive a retraction from Diaspora to be relayed by us, we need to insert the signature
// into the DB and call notifier.php
// CHECK 2. diaspora_send_retraction() needs to be modified to send
// Diaspora a retraction for it to relay when appropriate
// CHECK 3. notifier.php (and delivery.php?) need to be modified to call the right functions for the right
// retraction situation
// 4. If possible, modify notifier.php (and delivery.php?) to remove the relayable retraction's signature
// from the DB after finishing with relaying retractions
$a = get_app();
$myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
$myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
$theiraddr = $contact['addr'];
@@ -2155,29 +2213,42 @@ function diaspora_send_relay($item,$owner,$contact,$public_batch = false) {
else
return;
$like = false;
$relay_retract = false;
$sql_sign_id = 'iid';
if($item['verb'] === ACTIVITY_LIKE) {
$tpl = get_markup_template('diaspora_like_relay.tpl');
$like = true;
$target_type = 'Post';
$positive = (($item['deleted']) ? 'false' : 'true');
}
else {
elseif(! $item['deleted']) {
$tpl = get_markup_template('diaspora_comment_relay.tpl');
$like = false;
}
else {
$tpl = get_markup_template('diaspora_relayable_retraction.tpl');
$relay_retract = true;
$sql_sign_id = 'retract_iid';
$target_type = 'Comment';
}
$body = $item['body'];
$text = html_entity_decode(bb2diaspora($body));
// fetch the original signature if somebody sent the post to us to relay
//
// If we are relaying for a reply originating on our own account, there wasn't a 'send to relay'
// action. It wasn't needed. In that case create the original signature and the
// owner (parent author) signature
// Note that mod/item.php seems to take care of creating a signature for Diaspora for replies
// created on our own account
//
// comments from other networks will be relayed under our name, with a brief
// preamble to describe what's happening and noting the real author
$r = q("select * from sign where iid = %d limit 1",
$r = q("select * from sign where " . $sql_sign_id . " = %d limit 1",
intval($item['id'])
);
if(count($r)) {
@@ -2196,29 +2267,39 @@ function diaspora_send_relay($item,$owner,$contact,$public_batch = false) {
$prefix = sprintf( t('[Relayed] Comment authored by %s from network %s'),
'['. $item['author-name'] . ']' . '(' . $item['author-link'] . ')',
network_to_name($itemcontact['network'])) . "\n";
// "$body" was assigned to "$text" above. It isn't used after that, so I don't think
// the following change will do anything
$body = $prefix . $body;
// I think this comment will fail upon reaching Diaspora, because "$signed_text" is not defined
}
}
else {
// I'm confused about this "else." Since it sets "$handle = $myaddr," it seems like it should be for the case
// where the top-level post owner commented on his own post, i.e. "$itemcontact[0]['self']" is true. But it's
// positioned to be for the case where "count($itemcontact)" is 0.
$handle = $myaddr;
if($like)
$signed_text = $item['guid'] . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $myaddr;
$signed_text = $item['guid'] . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $handle;
elseif($relay_retract)
$signed_text = $item['guid'] . ';' . $target_type;
else
$signed_text = $item['guid'] . ';' . $parent_guid . ';' . $text . ';' . $myaddr;
$signed_text = $item['guid'] . ';' . $parent_guid . ';' . $text . ';' . $handle;
$authorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
q("insert into sign (`" . $sql_sign_id . "`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
intval($item['id']),
dbesc($signed_text),
dbesc(base64_encode($authorsig)),
dbesc($myaddr)
dbesc($authorsig),
dbesc($handle)
);
$handle = $myaddr;
}
}
// sign it
// sign it with the top-level owner's signature
$parentauthorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
@@ -2226,14 +2307,15 @@ function diaspora_send_relay($item,$owner,$contact,$public_batch = false) {
'$guid' => xmlify($item['guid']),
'$parent_guid' => xmlify($parent_guid),
'$target_type' =>xmlify($target_type),
'$authorsig' => xmlify($orig_sign['signature']),
'$authorsig' => xmlify($authorsig),
'$parentsig' => xmlify($parentauthorsig),
'$body' => xmlify($text),
'$positive' => xmlify($positive),
'$handle' => xmlify($handle)
));
logger('diaspora_relay_comment: base message: ' . $msg, LOGGER_DATA);
logger('diaspora_send_relay: base message: ' . $msg, LOGGER_DATA);
$slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
@@ -2248,14 +2330,25 @@ function diaspora_send_retraction($item,$owner,$contact,$public_batch = false) {
$a = get_app();
$myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
$signed_text = $item['guid'] . ';' . 'StatusMessage';
// Check if the retraction is for a top-level post, or whether it's for a comment
if( $item['id'] !== $item['parent'] ) {
$tpl = get_markup_template('diaspora_relay_retraction.tpl');
$target_type = 'Comment';
}
else {
$tpl = get_markup_template('diaspora_signed_retract.tpl');
$target_type = 'StatusMessage';
}
$signed_text = $item['guid'] . ';' . $target_type;
$tpl = get_markup_template('diaspora_signed_retract.tpl');
$msg = replace_macros($tpl, array(
'$guid' => $item['guid'],
'$type' => 'StatusMessage',
'$handle' => $myaddr,
'$signature' => base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'))
'$guid' => xmlify($item['guid']),
'$type' => xmlify($target_type),
'$handle' => xmlify($myaddr),
'$signature' => xmlify(base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256')))
));
$slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));