ssh_keys_delete.c

/**
 * Callback function that deletes an SSH key from the list of keys authorised
 * for access to the initrd. The line will be left empty, because that keeps
 * the ids of SSH keys intact for ssh_keys_get
 *
 * @param[in]   request   incoming HTTP request
 * @param[out]  response  HTTP response to the request
 * @param[in]   user_data extra data to pass between main thread and callbacks
 * @return                internal status code
 */
int callback_ssh_keys_delete(const struct _u_request * request,
    struct _u_response * response, void * user_data)
{
    // Read ssh key id from request URI.
    const char * id_string = u_map_get(request->map_url, "id");
    if (id_string == NULL)
    {
        return send_simple_response(response, 400, "error",
            "missing url parameter `id`");
    }

    int id;
    int r = parse_int(id_string, &id);
    if (r != 0)
    {
        y_log_message(Y_LOG_LEVEL_WARNING,
            "invalid url parameter `id`: %s\n", id_string);
        return send_simple_response(response, 400, "error",
            "invalid url parameter `id`");
    }

    // Replace the key at ID with ""
    r = replace_ssh_key(id, "");
    if (r < 0)
    {
        if (r == -1)
            return send_simple_response(response, 500, "error",
                "error opening authorized_keys");
        if (r == -2)
            return send_simple_response(response, 500, "error",
                "error opening authorized_keys tmp file");
        return send_simple_response(response, 500, "error",
            "Unknown error while processing ssh keys");
    }
    return send_simple_response(response, 200, "status", "ok");
}