+ if (defined('CIVICRM_SIGN_KEYS') && CIVICRM_SIGN_KEYS !== '') {
+ foreach (explode(' ', CIVICRM_SIGN_KEYS) as $n => $keyExpr) {
+ $key = ['tags' => ['SIGN'], 'weight' => $n];
+ $registry->addSymmetricKey($registry->parseKey($keyExpr) + $key);
+ }
+ }
+