This is another rather major change to the samba authenticaion

subystem.

The particular aim is to modularized the interface - so that we
can have arbitrary password back-ends.

This code adds one such back-end, a 'winbind' module to authenticate
against the winbind_auth_crap functionality.  While fully-functional
this code is mainly useful as a demonstration, because we don't get
back the info3 as we would for direct ntdomain authentication.

This commit introduced the new 'auth methods' parameter, in the
spirit of the 'auth order' discussed on the lists.  It is renamed
because not all the methods may be consulted, even if previous
methods fail - they may not have a suitable challenge for example.

Also, we have a 'local' authentication method, for old-style
'unix if plaintext, sam if encrypted' authentication and a
'guest' module to handle guest logins in a single place.

While this current design is not ideal, I feel that it does
provide a better infrastructure than the current design, and can
be built upon.

The following parameters have changed:
 - use rhosts =

  This has been replaced by the 'rhosts' authentication method,
 and can be specified like 'auth methods = guest rhosts'

 - hosts equiv =

  This needs both this parameter and an 'auth methods' entry
  to be effective.  (auth methods = guest hostsequiv ....)

 - plaintext to smbpasswd =

  This is replaced by specifying 'sam' rather than 'local'
  in the auth methods.

The security = parameter is unchanged, and now provides defaults
for the 'auth methods' parameter.

The available auth methods are:

guest
rhosts
hostsequiv
sam (passdb direct hash access)
unix (PAM, crypt() etc)
local (the combination of the above, based on encryption)
smbserver (old security=server)
ntdomain (old security=domain)
winbind (use winbind to cache DC connections)


Assistance in testing, or the production of new and interesting
authentication modules is always appreciated.

Andrew Bartlett
(This used to be commit 8d31eae52a9757739711dbb82035a4dfe6b40c99)

1 files changed, 87 insertions, 0 deletions

diff --git a/source3/auth/auth_builtin.c b/source3/auth/auth_builtin.c
new file mode 100644
index 0000000000..6ea6d0bbe0
--- /dev/null
+++ b/source3/auth/auth_builtin.c
@@ -0,0 +1,87 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 3.0.
+   Generic authenticaion types
+   Copyright (C) Andrew Bartlett              2001
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+/****************************************************************************
+ Check for a guest logon (username = "") and if so create the required 
+ structure.
+****************************************************************************/
+
+static NTSTATUS check_guest_security(void *my_private_data, 
+			      const auth_usersupplied_info *user_info, 
+			      const auth_authsupplied_info *auth_info,
+			      auth_serversupplied_info **server_info)
+{
+	NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
+
+	if (!(user_info->internal_username.str 
+	      && *user_info->internal_username.str)) { 
+		if (make_server_info_guest(server_info)) {
+			nt_status = NT_STATUS_OK;
+		} else {
+			nt_status = NT_STATUS_NO_SUCH_USER;
+		}
+	}
+
+	return nt_status;
+}
+
+BOOL auth_init_guest(auth_methods **auth_method) 
+{
+	if (!make_auth_methods(auth_method)) {
+		return False;
+	}
+
+	(*auth_method)->auth = check_guest_security;
+	return True;
+}
+
+/****************************************************************************
+ Check against either sam or unix, depending on encryption.
+****************************************************************************/
+
+static NTSTATUS check_local_security(void *my_private_data,
+			      const auth_usersupplied_info *user_info, 
+			      const auth_authsupplied_info *auth_info,
+			      auth_serversupplied_info **server_info)
+{
+	NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
+
+	if (user_info->encrypted) {
+		nt_status = check_sam_security(my_private_data, user_info, auth_info, server_info);
+	} else {
+		nt_status = check_unix_security(my_private_data, user_info, auth_info, server_info);
+	}
+	
+	return nt_status;
+}
+
+BOOL auth_init_local(auth_methods **auth_method) 
+{
+	if (!make_auth_methods(auth_method)) {
+		return False;
+	}
+
+	(*auth_method)->auth = check_local_security;
+	return True;
+}
+