[evolution-data-server/gnome-3-0] calendar file backend: white list check for supported CalObjModType

[Patrick Ohly <pohly src gnome org>]

commit 72a9a2e3efeb4c572067d66b066fda90303d61cf
Author: Patrick Ohly <patrick ohly intel com>
Date:   Thu May 12 09:48:37 2011 +0200

    calendar file backend: white list check for supported CalObjModType
    
    Explicitly check that the CalObjModType is supported before
    starting to work on the appointment. Relies in libecal to reject
    completely bogus modes with an "invalid parameter" error.
    (cherry picked from commit bbe2d0a49089ee9f5522ce2749a009c730dd9079)

 calendar/backends/file/e-cal-backend-file.c |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)
---
diff --git a/calendar/backends/file/e-cal-backend-file.c b/calendar/backends/file/e-cal-backend-file.c
index 6925bc5..cb78e80 100644
--- a/calendar/backends/file/e-cal-backend-file.c
+++ b/calendar/backends/file/e-cal-backend-file.c
@@ -2414,6 +2414,16 @@ e_cal_backend_file_modify_object (ECalBackendSync *backend, EDataCal *cal, const
 
 	e_return_data_cal_error_if_fail (priv->icalcomp != NULL, NoSuchCal);
 	e_return_data_cal_error_if_fail (calobj != NULL, ObjectNotFound);
+	switch (mod) {
+	case CALOBJ_MOD_THIS:
+	case CALOBJ_MOD_THISANDPRIOR:
+	case CALOBJ_MOD_THISANDFUTURE:
+	case CALOBJ_MOD_ALL:
+		break;
+	default:
+		g_propagate_error (error, EDC_ERROR (NotSupported));
+		return;
+	}
 
 	/* Parse the icalendar text */
 	icalcomp = icalparser_parse_string ((gchar *) calobj);
@@ -2612,6 +2622,9 @@ e_cal_backend_file_modify_object (ECalBackendSync *backend, EDataCal *cal, const
 			g_list_free (detached);
 		}
 		break;
+	case CALOBJ_MOD_ONLY_THIS:
+		// not reached, keep compiler happy
+		break;
 	}
 
 	save (cbfile);
@@ -2756,6 +2769,16 @@ e_cal_backend_file_remove_object (ECalBackendSync *backend, EDataCal *cal,
 
 	e_return_data_cal_error_if_fail (priv->icalcomp != NULL, NoSuchCal);
 	e_return_data_cal_error_if_fail (uid != NULL, ObjectNotFound);
+	switch (mod) {
+	case CALOBJ_MOD_THIS:
+	case CALOBJ_MOD_THISANDPRIOR:
+	case CALOBJ_MOD_THISANDFUTURE:
+	case CALOBJ_MOD_ALL:
+		break;
+	default:
+		g_propagate_error (error, EDC_ERROR (NotSupported));
+		return;
+	}
 
 	*old_object = *object = NULL;
 
@@ -2778,6 +2801,9 @@ e_cal_backend_file_remove_object (ECalBackendSync *backend, EDataCal *cal,
 
 		*object = NULL;
 		break;
+	case CALOBJ_MOD_ONLY_THIS:
+		/* not reached, keep compiler happy */
+		break;
 	case CALOBJ_MOD_THIS :
 		*old_object = get_object_string_from_fileobject (obj_data, recur_id);