idmap_adex: Add new idmap plugin for support RFC2307 enabled AD forests.

The adex idmap/nss_info plugin is an adapation of the Likewise
Enterprise plugin with support for OU based cells removed
(since the Windows pieces to manage the cells are not available).

This plugin supports

  * The RFC2307 schema for users and groups.
  * Connections to trusted domains
  * Global catalog searches
  * Cross forest trusts
  * User and group aliases

Prerequiste: Add the following attributes to the Partial Attribute
Set in global catalog:

  * uidNumber
  * uid
  * gidNumber

A basic config using the current trunk code would look like

 [global]
      idmap backend = adex
      idmap uid = 10000 - 19999
      idmap gid = 20000 - 29999
      idmap config US:backend = adex
      idmap config US:range = 20000 - 29999
      winbind nss info = adex

       winbind normalize names = yes
       winbind refresh tickets = yes
       template homedir = /home/%D/%U
       template shell = /bin/bash

1 files changed, 292 insertions, 0 deletions

diff --git a/source3/winbindd/idmap_adex/cell_util.c b/source3/winbindd/idmap_adex/cell_util.c
new file mode 100644
index 0000000000..f5c08a0454
--- /dev/null
+++ b/source3/winbindd/idmap_adex/cell_util.c
@@ -0,0 +1,292 @@
+/*
+ * idmap_adex: Support for AD Forests
+ *
+ * Copyright (C) Gerald (Jerry) Carter 2006-2008
+ *
+ * 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"
+#include "idmap_adex.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_IDMAP
+
+/**********************************************************************
+**********************************************************************/
+
+ char *find_attr_string(char **list, size_t num_lines, const char *substr)
+{
+	int i;
+	int cmplen = strlen(substr);
+
+	for (i = 0; i < num_lines; i++) {
+		/* make sure to avoid substring matches like uid
+		   and uidNumber */
+		if ((StrnCaseCmp(list[i], substr, cmplen) == 0) &&
+		    (list[i][cmplen] == '=')) {
+			/* Don't return an empty string */
+			if (list[i][cmplen + 1] != '\0')
+				return &(list[i][cmplen + 1]);
+
+			return NULL;
+		}
+	}
+
+	return NULL;
+}
+
+/**********************************************************************
+**********************************************************************/
+
+ bool is_object_class(char **list, size_t num_lines, const char *substr)
+{
+	int i;
+
+	for (i = 0; i < num_lines; i++) {
+		if (strequal(list[i], substr)) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+/**********************************************************************
+ Find out about the cell (e.g. use2307Attrs, etc...)
+**********************************************************************/
+
+ NTSTATUS cell_lookup_settings(struct likewise_cell * cell)
+{
+	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
+
+	/* Parameter check */
+
+	if (!cell) {
+		nt_status = NT_STATUS_INVALID_PARAMETER;
+		BAIL_ON_NTSTATUS_ERROR(nt_status);
+	}
+
+	/* Only supporting Forest-wide, schema based searches */
+
+	cell_set_flags(cell, LWCELL_FLAG_USE_RFC2307_ATTRS);
+	cell_set_flags(cell, LWCELL_FLAG_SEARCH_FOREST);
+
+	cell->provider = &ccp_unified;
+
+	nt_status = NT_STATUS_OK;
+
+done:
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		DEBUG(1,("LWI: Failed to obtain cell settings (%s)\n",
+			 nt_errstr(nt_status)));
+	}
+
+	return nt_status;
+}
+
+
+static NTSTATUS cell_lookup_forest(struct likewise_cell *c)
+{
+	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
+	struct gc_info *gc = NULL;
+
+	if (!c) {
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	if ((gc = TALLOC_ZERO_P(NULL, struct gc_info)) == NULL) {
+		nt_status = NT_STATUS_NO_MEMORY;
+		BAIL_ON_NTSTATUS_ERROR(nt_status);
+	}
+
+	/* Query the rootDSE for the forest root naming conect first.
+           Check that the a GC server for the forest has not already
+	   been added */
+
+	nt_status = gc_find_forest_root(gc, cell_dns_domain(c));
+	BAIL_ON_NTSTATUS_ERROR(nt_status);
+
+	c->forest_name = talloc_strdup(c, gc->forest_name);
+	BAIL_ON_PTR_ERROR(c->forest_name, nt_status);
+
+done:
+	if (gc) {
+		talloc_free(gc);
+	}
+
+	return nt_status;
+}
+
+/**********************************************************************
+**********************************************************************/
+
+ NTSTATUS cell_locate_membership(ADS_STRUCT * ads)
+{
+	ADS_STATUS status;
+	char *domain_dn = ads_build_dn(lp_realm());
+	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
+	DOM_SID sid;
+	struct likewise_cell *cell = NULL;
+
+	/* In the Likewise plugin, I had to support the concept of cells
+	   based on the machine's membership in an OU.  However, now I'll
+	   just assume our membership in the forest cell */
+
+	DEBUG(2, ("locate_cell_membership: Located membership "
+		  "in cell \"%s\"\n", domain_dn));
+
+	if ((cell = cell_new()) == NULL) {
+		nt_status = NT_STATUS_NO_MEMORY;
+		BAIL_ON_NTSTATUS_ERROR(nt_status);
+	}
+
+	status = ads_domain_sid(ads, &sid);
+	if (!ADS_ERR_OK(status)) {
+		DEBUG(3,("locate_cell_membership: Failed to find "
+			 "domain SID for %s\n", domain_dn));
+	}
+
+	/* save the SID and search base for our domain */
+
+	cell_set_dns_domain(cell, lp_realm());
+	cell_set_connection(cell, ads);
+	cell_set_dn(cell, domain_dn);
+	cell_set_domain_sid(cell, &sid);
+
+	/* Now save our forest root */
+
+	cell_lookup_forest(cell);
+
+	/* Add the cell to the list */
+
+	if (!cell_list_add(cell)) {
+		nt_status = NT_STATUS_INSUFFICIENT_RESOURCES;
+		BAIL_ON_NTSTATUS_ERROR(nt_status);
+	}
+
+	/* Done! */
+	nt_status = NT_STATUS_OK;
+
+done:
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		DEBUG(0,("LWI: Failed to locate cell membership (%s)\n",
+			 nt_errstr(nt_status)));
+	}
+
+	SAFE_FREE(domain_dn);
+
+	return nt_status;
+}
+
+/*********************************************************************
+ ********************************************************************/
+
+ int min_id_value(void)
+{
+	int id_val;
+
+	id_val = lp_parm_int(-1, "lwidentity", "min_id_value", MIN_ID_VALUE);
+
+	/* Still don't let it go below 50 */
+
+	return MAX(50, id_val);
+}
+
+/********************************************************************
+ *******************************************************************/
+
+ char *cell_dn_to_dns(const char *dn)
+{
+	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
+	char *domain = NULL;
+	char *dns_name = NULL;
+	const char *tmp_dn;
+	char *buffer = NULL;
+	TALLOC_CTX *frame = talloc_stackframe();
+
+	if (!dn || !*dn) {
+		goto done;
+	}
+
+	tmp_dn = talloc_strdup(frame, dn);
+	BAIL_ON_PTR_ERROR(tmp_dn, nt_status);
+
+	while (next_token_talloc(frame, &tmp_dn, &buffer, ",")) {
+
+		/* skip everything up the where DC=... begins */
+		if (StrnCaseCmp(buffer, "DC=", 3) != 0)
+			continue;
+
+		if (!domain) {
+			domain = talloc_strdup(frame, &buffer[3]);
+		} else {
+			domain = talloc_asprintf_append(domain, ".%s",
+							&buffer[3]);
+		}
+		BAIL_ON_PTR_ERROR(domain, nt_status);
+	}
+
+	dns_name = SMB_STRDUP(domain);
+	BAIL_ON_PTR_ERROR(dns_name, nt_status);
+
+	nt_status = NT_STATUS_OK;
+
+done:
+	PRINT_NTSTATUS_ERROR(nt_status, "cell_dn_to_dns", 1);
+
+	talloc_destroy(frame);
+
+	return dns_name;
+}
+
+/*********************************************************************
+ ********************************************************************/
+
+ NTSTATUS get_sid_type(ADS_STRUCT *ads,
+		       LDAPMessage *msg,
+		       enum lsa_SidType *type)
+{
+	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
+	uint32_t atype;
+
+	if (!ads_pull_uint32(ads, msg, "sAMAccountType", &atype)) {
+		nt_status = NT_STATUS_INVALID_USER_BUFFER;
+		BAIL_ON_NTSTATUS_ERROR(nt_status);
+	}
+
+	switch (atype &0xF0000000) {
+	case ATYPE_SECURITY_GLOBAL_GROUP:
+		*type = SID_NAME_DOM_GRP;
+		break;
+	case ATYPE_SECURITY_LOCAL_GROUP:
+		*type = SID_NAME_ALIAS;
+		break;
+	case ATYPE_NORMAL_ACCOUNT:
+	case ATYPE_WORKSTATION_TRUST:
+	case ATYPE_INTERDOMAIN_TRUST:
+		*type = SID_NAME_USER;
+		break;
+	default:
+		*type = SID_NAME_USE_NONE;
+		nt_status = NT_STATUS_INVALID_ACCOUNT_NAME;
+		BAIL_ON_NTSTATUS_ERROR(nt_status);
+	}
+
+	nt_status = NT_STATUS_OK;
+
+done:
+	return nt_status;
+}