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, 29 insertions, 3 deletions

diff --git a/source3/winbindd/nss_info_template.c b/source3/winbindd/nss_info_template.c
index aaf02e4abe..d8f903ddd0 100644
--- a/source3/winbindd/nss_info_template.c
+++ b/source3/winbindd/nss_info_template.c
@@ -45,6 +45,8 @@ static NTSTATUS nss_template_get_info( struct nss_domain_entry *e,
 	if ( !homedir || !shell || !gecos )
 		return NT_STATUS_INVALID_PARAMETER;
 	
+	/* protect against home directories using whitespace in the
+	  username */
 	*homedir = talloc_strdup( ctx, lp_template_homedir() );
 	*shell   = talloc_strdup( ctx, lp_template_shell() );
 	*gecos   = NULL;
@@ -56,6 +58,28 @@ static NTSTATUS nss_template_get_info( struct nss_domain_entry *e,
 	return NT_STATUS_OK;
 }
 
+/**********************************************************************
+ *********************************************************************/
+
+static NTSTATUS nss_template_map_to_alias( TALLOC_CTX *mem_ctx,
+					   const char *domain,
+					   const char *name,
+					   char **alias )
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+/**********************************************************************
+ *********************************************************************/
+
+static NTSTATUS nss_template_map_from_alias( TALLOC_CTX *mem_ctx,
+					     const char *domain,
+					     const char *alias,
+					     char **name )
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
 /************************************************************************
  ***********************************************************************/
 
@@ -69,9 +93,11 @@ static NTSTATUS nss_template_close( void )
  ***********************************************************************/
 
 static struct nss_info_methods nss_template_methods = {
-	.init         = nss_template_init,
-	.get_nss_info = nss_template_get_info,
-	.close_fn     = nss_template_close
+	.init           = nss_template_init,
+	.get_nss_info   = nss_template_get_info,
+	.map_to_alias   = nss_template_map_to_alias,
+	.map_from_alias = nss_template_map_from_alias,
+	.close_fn       = nss_template_close
 };
 		
 NTSTATUS nss_info_template_init( void )