first public release of samba4 code

(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)

1 files changed, 192 insertions, 0 deletions

diff --git a/source4/passdb/machine_sid.c b/source4/passdb/machine_sid.c
new file mode 100644
index 0000000000..f19b4a0c1d
--- /dev/null
+++ b/source4/passdb/machine_sid.c
@@ -0,0 +1,192 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Password and authentication handling
+   Copyright (C) Jeremy Allison 		1996-2002
+   Copyright (C) Andrew Tridgell		2002
+   Copyright (C) Gerald (Jerry) Carter		2000
+   Copyright (C) Stefan (metze) Metzmacher	2002
+      
+   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"
+
+/* NOTE! the global_sam_sid is the SID of our local SAM. This is only
+   equal to the domain SID when we are a DC, otherwise its our
+   workstation SID */
+static DOM_SID *global_sam_sid=NULL;
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_PASSDB
+
+/****************************************************************************
+ Read a SID from a file. This is for compatibility with the old MACHINE.SID
+ style of SID storage
+****************************************************************************/
+static BOOL read_sid_from_file(const char *fname, DOM_SID *sid)
+{
+	char **lines;
+	int numlines;
+	BOOL ret;
+
+	lines = file_lines_load(fname, &numlines);
+	
+	if (!lines || numlines < 1) {
+		if (lines) file_lines_free(lines);
+		return False;
+	}
+	
+	ret = string_to_sid(sid, lines[0]);
+	file_lines_free(lines);
+	return ret;
+}
+
+/*
+  generate a random sid - used to build our own sid if we don't have one
+*/
+static void generate_random_sid(DOM_SID *sid)
+{
+	int i;
+	uchar raw_sid_data[12];
+
+	memset((char *)sid, '\0', sizeof(*sid));
+	sid->sid_rev_num = 1;
+	sid->id_auth[5] = 5;
+	sid->num_auths = 0;
+	sid->sub_auths[sid->num_auths++] = 21;
+
+	generate_random_buffer(raw_sid_data, 12, True);
+	for (i = 0; i < 3; i++)
+		sid->sub_auths[sid->num_auths++] = IVAL(raw_sid_data, i*4);
+}
+
+/****************************************************************************
+ Generate the global machine sid.
+****************************************************************************/
+
+static BOOL pdb_generate_sam_sid(void)
+{
+	char *fname = NULL;
+	BOOL is_dc = False;
+
+	if(global_sam_sid==NULL)
+		if(!(global_sam_sid=(DOM_SID *)malloc(sizeof(DOM_SID))))
+			return False;
+			
+	generate_wellknown_sids();
+
+	switch (lp_server_role()) {
+	case ROLE_DOMAIN_PDC:
+	case ROLE_DOMAIN_BDC:
+		is_dc = True;
+		break;
+	default:
+		is_dc = False;
+		break;
+	}
+
+	if (secrets_fetch_domain_sid(lp_netbios_name(), global_sam_sid)) {
+		DOM_SID domain_sid;
+
+		/* We got our sid. If not a pdc/bdc, we're done. */
+		if (!is_dc)
+			return True;
+
+		if (!secrets_fetch_domain_sid(lp_workgroup(), &domain_sid)) {
+
+			/* No domain sid and we're a pdc/bdc. Store it */
+
+			if (!secrets_store_domain_sid(lp_workgroup(), global_sam_sid)) {
+				DEBUG(0,("pdb_generate_sam_sid: Can't store domain SID as a pdc/bdc.\n"));
+				return False;
+			}
+			return True;
+		}
+
+		if (!sid_equal(&domain_sid, global_sam_sid)) {
+
+			/* Domain name sid doesn't match global sam sid. Re-store global sam sid as domain sid. */
+
+			DEBUG(0,("pdb_generate_sam_sid: Mismatched SIDs as a pdc/bdc.\n"));
+			if (!secrets_store_domain_sid(lp_workgroup(), global_sam_sid)) {
+				DEBUG(0,("pdb_generate_sam_sid: Can't re-store domain SID as a pdc/bdc.\n"));
+				return False;
+			}
+			return True;
+		}
+
+		return True;
+		
+	}
+
+	/* check for an old MACHINE.SID file for backwards compatibility */
+	asprintf(&fname, "%s/MACHINE.SID", lp_private_dir());
+
+	if (read_sid_from_file(fname, global_sam_sid)) {
+		/* remember it for future reference and unlink the old MACHINE.SID */
+		if (!secrets_store_domain_sid(lp_netbios_name(), global_sam_sid)) {
+			DEBUG(0,("pdb_generate_sam_sid: Failed to store SID from file-1.\n"));
+			SAFE_FREE(fname);
+			return False;
+		}
+		unlink(fname);
+		if (is_dc) {
+			if (!secrets_store_domain_sid(lp_workgroup(), global_sam_sid)) {
+				DEBUG(0,("pdb_generate_sam_sid: Failed to store domain SID from file-2.\n"));
+				SAFE_FREE(fname);
+				return False;
+			}
+		}
+
+		/* Stored the old sid from MACHINE.SID successfully.*/
+		SAFE_FREE(fname);
+		return True;
+	}
+
+	SAFE_FREE(fname);
+
+	/* we don't have the SID in secrets.tdb, we will need to
+           generate one and save it */
+	generate_random_sid(global_sam_sid);
+
+	if (!secrets_store_domain_sid(lp_netbios_name(), global_sam_sid)) {
+		DEBUG(0,("pdb_generate_sam_sid: Failed to store generated machine SID-3, nb name=%s.\n", lp_netbios_name()));
+		return False;
+	}
+	if (is_dc) {
+		if (!secrets_store_domain_sid(lp_workgroup(), global_sam_sid)) {
+			DEBUG(0,("pdb_generate_sam_sid: Failed to store generated domain SID-4, wg name=%s.\n", lp_workgroup()));
+			return False;
+		}
+	}
+
+	return True;
+}   
+
+/* return our global_sam_sid */
+DOM_SID *get_global_sam_sid(void)
+{
+	if (global_sam_sid != NULL)
+		return global_sam_sid;
+	
+	/* memory for global_sam_sid is allocated in 
+	   pdb_generate_sam_sid() as needed */
+
+	if (!pdb_generate_sam_sid())
+		global_sam_sid=NULL;	
+	
+	return global_sam_sid;
+}
+