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dynamic-launcher: Restrict the desktop file id more
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For flatpak apps, the dynamic launcher desktop file id shall be a valid
flatpak id plus the .desktop part.

Use the newly introduced xdp_app_info_is_valid_sub_app_id function to
make sure this is the case and allow other app kinds to add similar
restrictions.
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@swick
swick committed Oct 4, 2024
1 parent 5f6e534 commit b52915b
Showing 1 changed file with 11 additions and 17 deletions.
28 changes: 11 additions & 17 deletions src/dynamic-launcher.c
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Original file line number Diff line number Diff line change
Expand Up @@ -109,11 +109,11 @@ get_launcher_data_and_revoke_token (const char *token)
}

static gboolean
validate_desktop_file_id (const char *app_id,
validate_desktop_file_id (XdpAppInfo *app_info,
const char *desktop_file_id,
GError **error)
{
const char *after_app_id;
g_autofree char *no_dot_desktop = NULL;

if (!g_str_has_suffix (desktop_file_id, ".desktop"))
{
Expand All @@ -123,16 +123,14 @@ validate_desktop_file_id (const char *app_id,
return FALSE;
}

if (app_id == NULL || *app_id == '\0')
return TRUE;
no_dot_desktop = g_strndup (desktop_file_id,
strlen(desktop_file_id) - strlen (".desktop"));

after_app_id = desktop_file_id + strlen (app_id);
if (!g_str_has_prefix (desktop_file_id, app_id) || *after_app_id != '.')
if (!xdp_app_info_is_valid_sub_app_id (app_info, no_dot_desktop))
{
g_set_error (error,
XDG_DESKTOP_PORTAL_ERROR, XDG_DESKTOP_PORTAL_ERROR_INVALID_ARGUMENT,
_("Desktop file id missing app id prefix '%s.': %s"),
app_id, desktop_file_id);
_("Desktop file id is not valid"));
return FALSE;
}

Expand Down Expand Up @@ -372,7 +370,7 @@ handle_install (XdpDbusDynamicLauncher *object,
g_assert (icon_extension != NULL && icon_extension[0] != '\0');
g_assert (icon_size != NULL && icon_size[0] != '\0');

if (!validate_desktop_file_id (app_id, arg_desktop_file_id, &error))
if (!validate_desktop_file_id (call->app_info, arg_desktop_file_id, &error))
{
g_dbus_method_invocation_return_gerror (invocation, error);
return G_DBUS_METHOD_INVOCATION_HANDLED;
Expand Down Expand Up @@ -754,7 +752,6 @@ handle_uninstall (XdpDbusDynamicLauncher *object,
GVariant *arg_options)
{
Call *call = call_from_invocation (invocation);
const char *app_id = xdp_app_info_get_id (call->app_info);
g_autoptr(GError) error = NULL;
g_autoptr(GError) desktop_file_error = NULL;
g_autofree char *icon_dir = NULL;
Expand All @@ -765,7 +762,7 @@ handle_uninstall (XdpDbusDynamicLauncher *object,
g_autoptr(GFile) link_file = NULL;
g_autoptr(GKeyFile) desktop_keyfile = NULL;

if (!validate_desktop_file_id (app_id, arg_desktop_file_id, &error))
if (!validate_desktop_file_id (call->app_info, arg_desktop_file_id, &error))
{
g_dbus_method_invocation_return_gerror (invocation, error);
return G_DBUS_METHOD_INVOCATION_HANDLED;
Expand Down Expand Up @@ -813,14 +810,13 @@ handle_get_desktop_entry (XdpDbusDynamicLauncher *object,
const gchar *arg_desktop_file_id)
{
Call *call = call_from_invocation (invocation);
const char *app_id = xdp_app_info_get_id (call->app_info);
g_autoptr(GError) error = NULL;
g_autofree char *desktop_dir = NULL;
g_autofree char *contents = NULL;
g_autofree char *desktop_path = NULL;
gsize length;

if (!validate_desktop_file_id (app_id, arg_desktop_file_id, &error))
if (!validate_desktop_file_id (call->app_info, arg_desktop_file_id, &error))
goto error;

desktop_dir = g_build_filename (g_get_user_data_dir (), XDG_PORTAL_APPLICATIONS_DIR, NULL);
Expand Down Expand Up @@ -851,7 +847,6 @@ handle_get_icon (XdpDbusDynamicLauncher *object,
const gchar *arg_desktop_file_id)
{
Call *call = call_from_invocation (invocation);
const char *app_id = xdp_app_info_get_id (call->app_info);
g_autoptr(GError) error = NULL;
g_autofree char *desktop_dir = NULL;
g_autofree char *contents = NULL;
Expand All @@ -869,7 +864,7 @@ handle_get_icon (XdpDbusDynamicLauncher *object,
const gchar *icon_format = NULL;
int icon_size = 0;

if (!validate_desktop_file_id (app_id, arg_desktop_file_id, &error))
if (!validate_desktop_file_id (call->app_info, arg_desktop_file_id, &error))
goto error;

desktop_dir = g_build_filename (g_get_user_data_dir (), XDG_PORTAL_APPLICATIONS_DIR, NULL);
Expand Down Expand Up @@ -966,7 +961,6 @@ handle_launch (XdpDbusDynamicLauncher *object,
GVariant *arg_options)
{
Call *call = call_from_invocation (invocation);
const char *app_id = xdp_app_info_get_id (call->app_info);
g_autoptr(GError) error = NULL;
g_autofree char *desktop_dir = NULL;
g_autofree char *desktop_path = NULL;
Expand All @@ -975,7 +969,7 @@ handle_launch (XdpDbusDynamicLauncher *object,
GAppLaunchContext *launch_context = NULL;
g_autoptr(GDesktopAppInfo) app_info = NULL;

if (!validate_desktop_file_id (app_id, arg_desktop_file_id, &error))
if (!validate_desktop_file_id (call->app_info, arg_desktop_file_id, &error))
goto error;

desktop_dir = g_build_filename (g_get_user_data_dir (), XDG_PORTAL_APPLICATIONS_DIR, NULL);
Expand Down

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