s3-dcerpc: make auth context opaque

This way we always double check in advance that the context
is of the right type with talloc_get_type_abort instead of
potentially accessing random memory by addressing the wrong
structure in the union.

Signed-off-by: Günther Deschner <gd@samba.org>

1 files changed, 1 insertions, 6 deletions

diff --git a/source3/include/ntdomain.h b/source3/include/ntdomain.h
index 9fdb794fd3..b0a462399f 100644
--- a/source3/include/ntdomain.h
+++ b/source3/include/ntdomain.h
@@ -101,12 +101,7 @@ struct pipe_auth_data {
 	enum dcerpc_AuthType auth_type;
 	enum dcerpc_AuthLevel auth_level;
 
-	union {
-		struct schannel_state *schannel_auth;
-		struct auth_ntlmssp_state *auth_ntlmssp_state;
-		struct gse_context *gssapi_state;
-		struct spnego_context *spnego_state;
-	} a_u;
+	void *auth_ctx;
 
 	/* Only the client code uses these 3 for now */
 	char *domain;