winbindd: Add support for name aliasing.

* Add support user and group name aliasing by expanding
  the ws_name_replace() and ws_name_return() functions.
  The lookup path is
     aliases -> qualified name -> SID
     SID -> fully qualified name -> alias
  In other words, the name aliasing support is a thin layer
  built on top of SID/NAME translation.

* Rename the ws_name_XX() functions to normalize_name_map()
  and normalize_name_unmap().  Chaneg interface to return
  NTSTATUS rather than char *.

* Add associated cache validation functions.

1 files changed, 16 insertions, 2 deletions

diff --git a/source3/winbindd/winbindd_proto.h b/source3/winbindd/winbindd_proto.h
index e0fc073a0a..4774bc8106 100644
--- a/source3/winbindd/winbindd_proto.h
+++ b/source3/winbindd/winbindd_proto.h
@@ -583,8 +583,22 @@ NTSTATUS lookup_usergroups_cached(struct winbindd_domain *domain,
 				  TALLOC_CTX *mem_ctx,
 				  const DOM_SID *user_sid,
 				  uint32 *p_num_groups, DOM_SID **user_sids);
-void ws_name_replace( char *name, char replace );
-void ws_name_return( char *name, char replace );
+
+NTSTATUS normalize_name_map(TALLOC_CTX *mem_ctx,
+			    struct winbindd_domain *domain,
+			    char *name,
+			    char **normalized);
+NTSTATUS normalize_name_unmap(TALLOC_CTX *mem_ctx,
+			      char *name,
+			      char **normalized);
+
+NTSTATUS resolve_username_to_alias(TALLOC_CTX *mem_ctx,
+				   struct winbindd_domain *domain,
+				   const char *name, char **alias);
+NTSTATUS resolve_alias_to_username(TALLOC_CTX *mem_ctx,
+				   struct winbindd_domain *domain,
+				   const char *alias, char **name);
+
 bool winbindd_can_contact_domain(struct winbindd_domain *domain);
 bool winbindd_internal_child(struct winbindd_child *child);
 void winbindd_set_locator_kdc_envs(const struct winbindd_domain *domain);