upstream: Fix authentication failures when "AuthenticationMethods

any" in a Match block overrides a more restrictive global default.

Spotted by jmc@, ok markus@

OpenBSD-Commit-ID: a90a4fe2ab81d0eeeb8fdfc21af81f7eabda6666

1 files changed, 9 insertions, 1 deletions

diff --git a/auth2.c b/auth2.c
index e43350c36..16ae1a363 100644
--- a/auth2.c
+++ b/auth2.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: auth2.c,v 1.154 2019/01/19 21:41:18 djm Exp $ */
+/* $OpenBSD: auth2.c,v 1.155 2019/03/25 22:34:52 djm Exp $ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  *
@@ -577,6 +577,14 @@ auth2_setup_methods_lists(Authctxt *authctxt)
 {
         u_int i;
 
+        /* First, normalise away the "any" pseudo-method */
+        if (options.num_auth_methods == 1 &&
+            strcmp(options.auth_methods[0], "any") == 0) {
+                free(options.auth_methods[0]);
+                options.auth_methods[0] = NULL;
+                options.num_auth_methods = 0;
+        }
+
         if (options.num_auth_methods == 0)
                 return 0;
         debug3("%s: checking methods", __func__);