}
$parent_item = $r[0];
- $author_signed_data = $guid . ';' . $parent_guid . ';' . $text . ';' . $diaspora_handle;
- $author_signature = base64_decode($author_signature);
+ /* How Diaspora performs comment signature checking:
- 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 = $person['pubkey'];
- else {
- logger('diaspora_comment: unable to find author details');
- return;
- }
- }
+ - If an item has been sent by the comment author to the top-level post owner to relay on
+ to the rest of the contacts on the top-level post, the top-level post owner should check
+ the author_signature, then create a parent_author_signature before relaying the comment on
+ - If an item has been relayed on by the top-level post owner, the contacts who receive it
+ check only the parent_author_signature. Basically, they trust that the top-level post
+ owner has already verified the authenticity of anything he/she sends out
+ - In either case, the signature that get checked is the signature created by the person
+ who sent the salmon
+ */
- if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
- logger('diaspora_comment: verification failed.');
- return;
- }
+ $signed_data = $guid . ';' . $parent_guid . ';' . $text . ';' . $diaspora_handle;
+ $key = $msg['key'];
if($parent_author_signature) {
- $owner_signed_data = $guid . ';' . $parent_guid . ';' . $text . ';' . $diaspora_handle;
+ // If a parent_author_signature exists, then we've received the comment
+ // relayed from the top-level post owner. There's no need to check the
+ // author_signature if the parent_author_signature is valid
$parent_author_signature = base64_decode($parent_author_signature);
- $key = $msg['key'];
+ if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
+ logger('diaspora_comment: top-level owner verification failed.');
+ return;
+ }
+ }
+ else {
+ // If there's no parent_author_signature, then we've received the comment
+ // from the comment creator. In that case, the person is commenting on
+ // our post, so he/she must be a contact of ours and his/her public key
+ // should be in $msg['key']
+
+ $author_signature = base64_decode($author_signature);
- if(! rsa_verify($owner_signed_data,$parent_author_signature,$key,'sha256')) {
- logger('diaspora_comment: owner verification failed.');
+ if(! rsa_verify($signed_data,$author_signature,$key,'sha256')) {
+ logger('diaspora_comment: comment author verification failed.');
return;
}
}
// Phew! Everything checks out. Now create an item.
+ // Find the original comment author information.
+ // We need this to make sure we display the comment author
+ // information (name and avatar) correctly.
+ if(strcasecmp($diaspora_handle,$msg['author']) == 0)
+ $person = $contact;
+ else {
+ $person = find_diaspora_person_by_handle($diaspora_handle);
+
+ if(! is_array($person)) {
+ logger('diaspora_comment: unable to find author details');
+ return;
+ }
+ }
+
$body = diaspora2bb($text);
$message_id = $diaspora_handle . ':' . $guid;
logger('diaspora_like: duplicate like: ' . $guid);
return;
}
+ // Note: I don't think "Like" objects with positive = "false" are ever actually used
+ // It looks like "RelayableRetractions" are used for "unlike" instead
if($positive === 'false') {
- q("UPDATE `item` SET `deleted` = 1 WHERE `id` = %d AND `uid` = %d LIMIT 1",
+ logger('diaspora_like: received a like with positive set to "false"...ignoring');
+/* q("UPDATE `item` SET `deleted` = 1 WHERE `id` = %d AND `uid` = %d LIMIT 1",
intval($r[0]['id']),
intval($importer['uid'])
- );
- // FIXME
+ );*/
+ // FIXME--actually don't unless it turns out that Diaspora does indeed send out "false" likes
// send notification via proc_run()
return;
}
}
+ // Note: I don't think "Like" objects with positive = "false" are ever actually used
+ // It looks like "RelayableRetractions" are used for "unlike" instead
if($positive === 'false') {
- logger('diaspora_like: unlike received with no corresponding like');
+ logger('diaspora_like: received a like with positive set to "false"');
+ logger('diaspora_like: unlike received with no corresponding like...ignoring');
return;
}
- $author_signed_data = $guid . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $diaspora_handle;
- $author_signature = base64_decode($author_signature);
+ /* How Diaspora performs "like" signature checking:
- 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 = $person['pubkey'];
- else {
- logger('diaspora_like: unable to find author details');
- return;
- }
- }
+ - If an item has been sent by the like author to the top-level post owner to relay on
+ to the rest of the contacts on the top-level post, the top-level post owner should check
+ the author_signature, then create a parent_author_signature before relaying the like on
+ - If an item has been relayed on by the top-level post owner, the contacts who receive it
+ check only the parent_author_signature. Basically, they trust that the top-level post
+ owner has already verified the authenticity of anything he/she sends out
+ - In either case, the signature that get checked is the signature created by the person
+ who sent the salmon
+ */
- if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
- logger('diaspora_like: verification failed.');
- return;
- }
+ $signed_data = $guid . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $diaspora_handle;
+ $key = $msg['key'];
if($parent_author_signature) {
-
- $owner_signed_data = $guid . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $diaspora_handle;
+ // If a parent_author_signature exists, then we've received the like
+ // relayed from the top-level post owner. There's no need to check the
+ // author_signature if the parent_author_signature is valid
$parent_author_signature = base64_decode($parent_author_signature);
- $key = $msg['key'];
+ if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
+ logger('diaspora_like: top-level owner verification failed.');
+ return;
+ }
+ }
+ else {
+ // If there's no parent_author_signature, then we've received the like
+ // from the like creator. In that case, the person is "like"ing
+ // our post, so he/she must be a contact of ours and his/her public key
+ // should be in $msg['key']
+
+ $author_signature = base64_decode($author_signature);
- if(! rsa_verify($owner_signed_data,$parent_author_signature,$key,'sha256')) {
- logger('diaspora_like: owner verification failed.');
+ if(! rsa_verify($signed_data,$author_signature,$key,'sha256')) {
+ logger('diaspora_like: like creator verification failed.');
return;
}
}
// Phew! Everything checks out. Now create an item.
+ // Find the original comment author information.
+ // We need this to make sure we display the comment author
+ // information (name and avatar) correctly.
+ if(strcasecmp($diaspora_handle,$msg['author']) == 0)
+ $person = $contact;
+ else {
+ $person = find_diaspora_person_by_handle($diaspora_handle);
+
+ if(! is_array($person)) {
+ logger('diaspora_like: unable to find author details');
+ return;
+ }
+ }
+
$uri = $diaspora_handle . ':' . $guid;
$activity = ACTIVITY_LIKE;
$signed_data = $guid . ';' . $type ;
+ $key = $msg['key'];
- $sig_decode = base64_decode($sig);
+ /* How Diaspora performs relayable_retraction signature checking:
- if(strcasecmp($diaspora_handle,$msg['author']) == 0) {
- $person = $contact;
- $key = $msg['key'];
- }
- else {
- $person = find_diaspora_person_by_handle($diaspora_handle);
+ - If an item has been sent by the item author to the top-level post owner to relay on
+ to the rest of the contacts on the top-level post, the top-level post owner checks
+ the author_signature, then creates a parent_author_signature before relaying the item on
+ - If an item has been relayed on by the top-level post owner, the contacts who receive it
+ check only the parent_author_signature. Basically, they trust that the top-level post
+ owner has already verified the authenticity of anything he/she sends out
+ - In either case, the signature that get checked is the signature created by the person
+ who sent the salmon
+ */
- if(is_array($person) && x($person,'pubkey'))
- $key = $person['pubkey'];
- else {
- logger('diaspora_signed_retraction: unable to find author details');
+ if($parent_author_signature) {
+
+ $parent_author_signature = base64_decode($parent_author_signature);
+
+ if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
+ logger('diaspora_signed_retraction: top-level post owner verification failed');
return;
}
- }
- if(! rsa_verify($signed_data,$sig_decode,$key,'sha256')) {
- logger('diaspora_signed_retraction: retraction-owner verification failed.' . print_r($msg,true));
- return;
}
+ else {
- if($parent_author_signature) {
- $parent_author_signature = base64_decode($parent_author_signature);
-
- $key = $msg['key'];
+ $sig_decode = base64_decode($sig);
- if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
- logger('diaspora_signed_retraction: failed to verify person relaying the retraction (e.g. owner of a post relaying a retracted comment');
+ if(! rsa_verify($signed_data,$sig_decode,$key,'sha256')) {
+ logger('diaspora_signed_retraction: retraction owner verification failed.' . print_r($msg,true));
return;
}
-
}
if($type === 'StatusMessage' || $type === 'Comment' || $type === 'Like') {
$a = get_app();
$myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
- $theiraddr = $contact['addr'];
+// $theiraddr = $contact['addr'];
// 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.
$tpl = get_markup_template('diaspora_like.tpl');
$like = true;
$target_type = 'Post';
- $positive = (($item['deleted']) ? 'false' : 'true');
+// $positive = (($item['deleted']) ? 'false' : 'true');
+ $positive = 'true';
+
+ if(($item['deleted']))
+ logger('diaspora_send_followup: received deleted "like". Those should go to diaspora_send_retraction');
}
else {
$tpl = get_markup_template('diaspora_comment.tpl');
function diaspora_send_relay($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.
-
$a = get_app();
$myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
- $theiraddr = $contact['addr'];
+// $theiraddr = $contact['addr'];
+
+ $body = $item['body'];
+ $text = html_entity_decode(bb2diaspora($body));
// The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always
$relay_retract = false;
$sql_sign_id = 'iid';
if( $item['deleted']) {
- $tpl = get_markup_template('diaspora_relayable_retraction.tpl');
$relay_retract = true;
- $sql_sign_id = 'retract_iid';
+
$target_type = ( ($item['verb'] === ACTIVITY_LIKE) ? 'Like' : 'Comment');
+ $sender_signed_text = $item['guid'] . ';' . $target_type ;
+
+ $sql_sign_id = 'retract_iid';
+ $tpl = get_markup_template('diaspora_relayable_retraction.tpl');
}
elseif($item['verb'] === ACTIVITY_LIKE) {
- $tpl = get_markup_template('diaspora_like_relay.tpl');
$like = true;
+
$target_type = 'Post';
- $positive = (($item['deleted']) ? 'false' : 'true');
+// $positive = (($item['deleted']) ? 'false' : 'true');
+ $positive = 'true';
+ $sender_signed_text = $item['guid'] . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $myaddr;
+
+ $tpl = get_markup_template('diaspora_like_relay.tpl');
}
- else {
+ else { // item is a comment
+ $sender_signed_text = $item['guid'] . ';' . $parent_guid . ';' . $text . ';' . $myaddr;
+
$tpl = get_markup_template('diaspora_comment_relay.tpl');
}
- $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
+ // fetch the original signature if the relayable was created by a Diaspora
+ // or DFRN user. Relayables for other networks are not supported.
$r = q("select * from sign where " . $sql_sign_id . " = %d limit 1",
intval($item['id'])
}
else {
- $itemcontact = q("select * from contact where `id` = %d limit 1",
- intval($item['contact-id'])
- );
- if(count($itemcontact)) {
- if(! $itemcontact[0]['self']) {
- $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 . ';' . $handle;
- elseif($relay_retract)
- $signed_text = $item['guid'] . ';' . $target_type;
- else
- $signed_text = $item['guid'] . ';' . $parent_guid . ';' . $text . ';' . $handle;
-
- $authorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
-
- q("insert into sign (`" . $sql_sign_id . "`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
- intval($item['id']),
- dbesc($signed_text),
- dbesc($authorsig),
- dbesc($handle)
- );
- }
+ // Author signature information (for likes, comments, and retractions of likes or comments,
+ // whether from Diaspora or Friendica) must be placed in the `sign` table before this
+ // function is called
+ logger('diaspora_send_relay: original author signature not found, cannot send relayable');
+ return;
}
- // sign it with the top-level owner's signature
+ // Sign the relayable with the top-level owner's signature
+ //
+ // We'll use the $sender_signed_text that we just created, instead of the $signed_text
+ // stored in the database, because that provides the best chance that Diaspora will
+ // be able to reconstruct the signed text the same way we did. This is particularly a
+ // concern for the comment, whose signed text includes the text of the comment. The
+ // smallest change in the text of the comment, including removing whitespace, will
+ // make the signature verification fail. Since we translate from BB code to Diaspora's
+ // markup at the top of this function, which is AFTER we placed the original $signed_text
+ // in the database, it's hazardous to trust the original $signed_text.
- $parentauthorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
+ $parentauthorsig = base64_encode(rsa_sign($sender_signed_text,$owner['uprvkey'],'sha256'));
$msg = replace_macros($tpl,array(
'$guid' => xmlify($item['guid']),
$a = get_app();
$myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
- // Check if the retraction is for a top-level post, or whether it's for a comment
- if( $item['id'] !== $item['parent'] ) {
+ // Check whether the retraction is for a top-level post or whether it's a relayable
+ if( $item['uri'] !== $item['parent-uri'] ) {
$tpl = get_markup_template('diaspora_relay_retraction.tpl');
- $target_type = 'Comment';
+ $target_type = (($item['verb'] === ACTIVITY_LIKE) ? 'Like' : 'Comment');
}
else {
return(($return_code) ? $return_code : (-1));
}
+
+
projects / friendica.git / blobdiff