docs: function (jws, pubKey, alg) {
      /*
        convert various public key format to RSAKey object
        see @KEYUTIL.getKey for a full list of supported input format
       */
      var rsaKey = KEYUTIL.getKey(pubKey);
  
      return KJUR.jws.JWS.verify(jws, rsaKey, [alg]);
    }