Check "auth event notification" param in log_json

When Samba is compiled with JSON support it logs an error message
at log level 3 by default for every authentication event:

get_auth_event_server: Failed to find 'auth_event' registered on the
message bus to send JSON authentication events to:
NT_STATUS_OBJECT_NAME_NOT_FOUND

This patch adjusts the log_json function to consider the smb.conf
parameter "auth event notification" before calling auth_message_send.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=13381

Signed-off-by: Arvid Requate <requate@univention.de>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Thu Apr 12 08:12:39 CEST 2018 on sn-devel-144

diff --git a/auth/auth_log.c b/auth/auth_log.c
index d4c6c445bed8dd05ef39c3a4be26f6a672d50e69..c143ae306fb2bfd342ec302f8dd1e8822ff4cd02 100644 (file)
--- a/auth/auth_log.c
+++ b/auth/auth_log.c
@@ -201,6 +201,7 @@ static void auth_message_send(struct imessaging_context *msg_ctx,
  *
  */
 static void log_json(struct imessaging_context *msg_ctx,
+                    struct loadparm_context *lp_ctx,
                     struct json_context *context,
                     const char *type, int debug_class, int debug_level)
 {
@@ -218,7 +219,9 @@ static void log_json(struct imessaging_context *msg_ctx,
        }
 
        DEBUGC(debug_class, debug_level, ("JSON %s: %s\n", type, json));
-       auth_message_send(msg_ctx, json);
+       if (msg_ctx && lp_ctx && lpcfg_auth_event_notification(lp_ctx)) {
+               auth_message_send(msg_ctx, json);
+       }
 
        if (json) {
                free(json);
@@ -502,7 +505,12 @@ static void log_authentication_event_json(
        add_string(&authentication, "passwordType", get_password_type(ui));
        add_object(&context,AUTH_JSON_TYPE, &authentication);
 
-       log_json(msg_ctx, &context, AUTH_JSON_TYPE, DBGC_AUTH_AUDIT, debug_level);
+       log_json(msg_ctx,
+                lp_ctx,
+                &context,
+                AUTH_JSON_TYPE,
+                DBGC_AUTH_AUDIT,
+                debug_level);
        free_json_context(&context);
 }
 
@@ -566,6 +574,7 @@ static void log_successful_authz_event_json(
        add_object(&context,AUTHZ_JSON_TYPE, &authorization);
 
        log_json(msg_ctx,
+                lp_ctx,
                 &context,
                 AUTHZ_JSON_TYPE,
                 DBGC_AUTH_AUDIT,