SshException propagate(Exception e, String message) {
message += ": " + e.getMessage();
logger.error(e, "<< " + message);
if (e instanceof UserAuthException)
throw new AuthorizationException("(" + toString() + ") " + message, e);
throw e instanceof SshException ? SshException.class.cast(e) : new SshException(
"(" + toString() + ") " + message, e);
}