Hello,<\/p>\n\n\n\n
I had a problem with a newsletter where the links were causing an “Invalid signature” error. Here’s the modification I made:<\/p>\n\n\n\n Can you please fix this in the next version.<\/p>\n","protected":false},"template":"","class_list":["post-19029088","topic","type-topic","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/19029088","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic"}],"about":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":1,"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/19029088\/revisions"}],"predecessor-version":[{"id":19029123,"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/19029088\/revisions\/19029123"}],"wp:attachment":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/media?parent=19029088"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
I’m using version 9.4.1, and the newsletter was sent using version 9.3.9.
I investigated the source of the error and had to modify the verify_signature<\/code> function in the statistics.php<\/code> file to fix the problem.<\/p>\n\n\n\n function verify_signature($text, $signature) {
$signature = trim($signature);
if (!$signature) {
return 0;
}
$parts = explode('.', $signature, 2);
if (count($parts) === 2) {
$time = (int) $parts[0];
$verified = hash_equals(md5($text . $time . $this->get_key()), $parts[1]);
if (!$verified) {
return 0;
}
return $time >= time() ? 1 : 2;
} else {
\/\/return $this->check_signature($text, $signature) ? 2 : 0;
return (md5($text . $this->get_key()) === $signature) ? 2 : 0;
}
}<\/code><\/pre>\n\n\n\n