From a30ed7453e2417d723907a3be5059b147be2470d Mon Sep 17 00:00:00 2001
From: Ralf Habacker <ralf.habacker@freenet.de>
Date: Mon, 22 Aug 2016 21:00:51 +0200
Subject: [PATCH] Let dbus-daemon allow all supported auth mechanismen in case
 of empty auth tag in bus config file.

https://bugs.freedesktop.org/show_bug.cgi?id=96577
---
 bus/bus.c        |  2 +-
 dbus/dbus-auth.c | 37 +++++++++++++++++++++++++++++++++++++
 dbus/dbus-auth.h |  2 ++
 3 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/bus/bus.c b/bus/bus.c
index e64cc8f..4fd120b 100644
--- a/bus/bus.c
+++ b/bus/bus.c
@@ -459,7 +459,7 @@ process_config_first_time_only (BusContext       *context,
     }
   else
     {
-      auth_mechanisms = NULL;
+      auth_mechanisms = _dbus_auth_get_supported_mechanisms_list ();
     }
 
   /* Listen on our addresses */
diff --git a/dbus/dbus-auth.c b/dbus/dbus-auth.c
index 265b424..dc29a1c 100644
--- a/dbus/dbus-auth.c
+++ b/dbus/dbus-auth.c
@@ -2878,6 +2878,43 @@ _dbus_auth_dump_supported_mechanisms (DBusString *buffer)
   return TRUE;
 }
 
+/**
+ * Return a list containing all supported auth mechanisms.
+ *
+ * @returns pointer to string list
+ * @returns #NULL on oom
+ * @note The returned list need to be free'd with dbus_free_string_array().
+ */
+char **
+_dbus_auth_get_supported_mechanisms_list (void)
+{
+  int i;
+  char **buffer, **p;
+
+  i = 0;
+  while (all_mechanisms[i].mechanism != NULL)
+      i++;
+
+  buffer = dbus_malloc ((i + 1) * sizeof(char *));
+  if (!buffer)
+    return NULL;
+
+  p = buffer;
+  i = 0;
+  while (all_mechanisms[i].mechanism != NULL)
+    {
+      char *s = strdup (all_mechanisms[i++].mechanism);
+      if (!s)
+        {
+          // clean up list
+          return NULL;
+        }
+      *p++ = s;
+    }
+  *p = NULL;
+  return buffer;
+}
+
 /** @} */
 
 /* tests in dbus-auth-util.c */
diff --git a/dbus/dbus-auth.h b/dbus/dbus-auth.h
index 991daca..46ab4ab 100644
--- a/dbus/dbus-auth.h
+++ b/dbus/dbus-auth.h
@@ -96,6 +96,8 @@ DBUS_PRIVATE_EXPORT
 dbus_bool_t   _dbus_auth_is_supported_mechanism(DBusString         *name);
 DBUS_PRIVATE_EXPORT
 dbus_bool_t   _dbus_auth_dump_supported_mechanisms(DBusString        *buffer);
+DBUS_PRIVATE_EXPORT
+char **       _dbus_auth_get_supported_mechanisms_list (void);
 
 DBUS_END_DECLS
 
-- 
1.8.4.5