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Merge pull request #1446 from annando/issue-905

Diaspora: The signature of likes are checked now correctly
pull/1448/head
fabrixxm 7 years ago
parent
commit
8b5d9c32a7
  1. 38
      include/diaspora.php

38
include/diaspora.php

@ -1936,7 +1936,7 @@ function diaspora_like($importer,$xml,$msg) {
if($positive === 'false') {
logger('diaspora_like: received a like with positive set to "false"');
logger('diaspora_like: unlike received with no corresponding like...ignoring');
return;
return;
}
@ -1952,26 +1952,28 @@ function diaspora_like($importer,$xml,$msg) {
who sent the salmon
*/
$signed_data = $guid . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $diaspora_handle;
// Diaspora has changed the way they are signing the likes.
// Just to make sure that we don't miss any likes we will check the old and the current way.
$old_signed_data = $guid . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $diaspora_handle;
$signed_data = $positive . ';' . $guid . ';' . $target_type . ';' . $parent_guid . ';' . $diaspora_handle;
$key = $msg['key'];
if($parent_author_signature) {
if ($parent_author_signature) {
// 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);
if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
if (intval(get_config('system','ignore_diaspora_like_signature')))
logger('diaspora_like: top-level owner verification failed. Proceeding anyway.');
else {
logger('diaspora_like: top-level owner verification failed.');
return;
}
if (!rsa_verify($signed_data,$parent_author_signature,$key,'sha256') AND
!rsa_verify($old_signed_data,$parent_author_signature,$key,'sha256')) {
logger('diaspora_like: top-level owner verification failed.');
return;
}
}
else {
} else {
// If there's no parent_author_signature, then we've received the like
// from the like creator. In that case, the person is "like"ing
// our post, so he/she must be a contact of ours and his/her public key
@ -1979,13 +1981,11 @@ function diaspora_like($importer,$xml,$msg) {
$author_signature = base64_decode($author_signature);
if(! rsa_verify($signed_data,$author_signature,$key,'sha256')) {
if (intval(get_config('system','ignore_diaspora_like_signature')))
logger('diaspora_like: like creator verification failed. Proceeding anyway');
else {
logger('diaspora_like: like creator verification failed.');
return;
}
if (!rsa_verify($signed_data,$author_signature,$key,'sha256') AND
!rsa_verify($old_signed_data,$author_signature,$key,'sha256')) {
logger('diaspora_like: like creator verification failed.');
return;
}
}

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