code: function splitChecksum(text) {
    let body = text;
    let checksum = "";
  
    const lastEquals = text.lastIndexOf("=");
  
    if (lastEquals >= 0 && lastEquals !== text.length - 1) { // '=' as the last char means no checksum
      body = text.slice(0, lastEquals);
      checksum = text.slice(lastEquals + 1).substr(0, 4);
    }
  
    return { body: body, checksum: checksum };
  }
docs: Splits a message into two parts, the body and the checksum. This is an internal function
  @param {String} text OpenPGP armored message part
  @returns {Object} An object with attribute "body" containing the body
  and an attribute "checksum" containing the checksum.