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Merge pull request #347 from fermionic/diaspora-more-signature-refinements 

create new signed text for relayables right when relaying them
This commit is contained in:
fermionic 2012-06-20 20:02:07 -07:00
parent 75e82dc077 73c6f40ebc
commit ec83a62f70
1 changed files with 28 additions and 52 deletions
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80
include/diaspora.php
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@ -2150,7 +2150,7 @@ function diaspora_send_followup($item,$owner,$contact,$public_batch = false) {
$a = get_app();
$myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
$theiraddr = $contact['addr'];
// $theiraddr = $contact['addr'];
// The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always
// return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent.
@ -2213,7 +2213,10 @@ function diaspora_send_relay($item,$owner,$contact,$public_batch = false) {
$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
@ -2232,26 +2235,30 @@ function diaspora_send_relay($item,$owner,$contact,$public_batch = false) {
$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 = '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 the relayable was created by a Diaspora
// or DFRN user. Relayables for other networks are not supported.
@ -2272,51 +2279,20 @@ function diaspora_send_relay($item,$owner,$contact,$public_batch = false) {
// function is called
logger('diaspora_send_relay: original author signature not found, cannot send relayable');
return;
/*
$itemcontact = q("select * from contact where `id` = %d limit 1",
intval($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)
);
}
*/
}
// 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']),