import base64


def decode_object_data(lines):
    """
    Decodes the base64 encoded data found within directory document objects.

    :param list(str) lines:
        the lines as found in a directory document object, not including
        newlines or the begin/end lines

    :returns: the decoded data
    :rtype: bytes
    """
    return base64.b64decode("".join(lines))