r15697: I take no comments as no objections :)

Expand the "winbind nss info" to also take "rfc2307" to support the
plain posix attributes LDAP schema from win2k3-r2.

This work is based on patches from Howard Wilkinson and Bob Gautier
(and closes bug #3345).

Guenther
(This used to be commit 52423e01dc209ba5abde808a446287714ed11567)

1 files changed, 329 insertions, 0 deletions

diff --git a/source3/libads/ldap_schema.c b/source3/libads/ldap_schema.c
new file mode 100644
index 0000000000..a0c735208f
--- /dev/null
+++ b/source3/libads/ldap_schema.c
@@ -0,0 +1,329 @@
+/* 
+   Unix SMB/CIFS implementation.
+   ads (active directory) utility library
+   Copyright (C) Guenther Deschner 2005-2006
+   Copyright (C) Gerald (Jerry) Carter 2006
+   
+   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"
+
+#ifdef HAVE_LDAP
+
+ADS_STATUS ads_get_attrnames_by_oids(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx,
+				     const char *schema_path,
+				     const char **OIDs, size_t num_OIDs, 
+				     char ***OIDs_out, char ***names, size_t *count)
+{
+	ADS_STATUS status;
+	void *res = NULL;
+	LDAPMessage *msg;
+	char *expr = NULL;
+	const char *attrs[] = { "lDAPDisplayName", "attributeId", NULL };
+	int i = 0, p = 0;
+	
+	if (!ads || !mem_ctx || !names || !count || !OIDs || !OIDs_out) {
+		return ADS_ERROR(LDAP_PARAM_ERROR);
+	}
+
+	if (num_OIDs == 0 || OIDs[0] == NULL) {
+		return ADS_ERROR_NT(NT_STATUS_NONE_MAPPED);
+	}
+
+	if ((expr = talloc_asprintf(mem_ctx, "(|")) == NULL) {
+		return ADS_ERROR(LDAP_NO_MEMORY);
+	}
+
+	for (i=0; i<num_OIDs; i++) {
+
+		if ((expr = talloc_asprintf_append(expr, "(attributeId=%s)", 
+						   OIDs[i])) == NULL) {
+			return ADS_ERROR(LDAP_NO_MEMORY);
+		}
+	}
+
+	if ((expr = talloc_asprintf_append(expr, ")")) == NULL) {
+		return ADS_ERROR(LDAP_NO_MEMORY);
+	}
+
+	status = ads_do_search_retry(ads, schema_path, 
+				     LDAP_SCOPE_SUBTREE, expr, attrs, &res);
+	if (!ADS_ERR_OK(status)) {
+		return status;
+	}
+
+	*count = ads_count_replies(ads, res);
+	if (*count == 0 || !res) {
+		status = ADS_ERROR_NT(NT_STATUS_NONE_MAPPED);
+		goto out;
+	}
+
+	if (((*names) = TALLOC_ARRAY(mem_ctx, char *, *count)) == NULL) {
+		status = ADS_ERROR(LDAP_NO_MEMORY);
+		goto out;
+	}
+	if (((*OIDs_out) = TALLOC_ARRAY(mem_ctx, char *, *count)) == NULL) {
+		status = ADS_ERROR(LDAP_NO_MEMORY);
+		goto out;
+	}
+
+	for (msg = ads_first_entry(ads, res); msg != NULL; 
+	     msg = ads_next_entry(ads, msg)) {
+
+		(*names)[p] 	= ads_pull_string(ads, mem_ctx, msg, 
+						  "lDAPDisplayName");
+		(*OIDs_out)[p] 	= ads_pull_string(ads, mem_ctx, msg, 
+						  "attributeId");
+		if (((*names)[p] == NULL) || ((*OIDs_out)[p] == NULL)) {
+			status = ADS_ERROR(LDAP_NO_MEMORY);
+			goto out;
+		}
+
+		p++;
+	}
+
+	if (*count < num_OIDs) {
+		status = ADS_ERROR_NT(STATUS_SOME_UNMAPPED);
+		goto out;
+	}
+
+	status = ADS_ERROR(LDAP_SUCCESS);
+out:
+	ads_msgfree(ads, res);
+
+	return status;
+}
+
+const char *ads_get_attrname_by_oid(ADS_STRUCT *ads, const char *schema_path, TALLOC_CTX *mem_ctx, const char * OID)
+{
+	ADS_STATUS rc;
+	int count = 0;
+	void *res = NULL;
+	char *expr = NULL;
+	const char *attrs[] = { "lDAPDisplayName", NULL };
+	char *result;
+
+	if (ads == NULL || mem_ctx == NULL || OID == NULL) {
+		goto failed;
+	}
+
+	expr = talloc_asprintf(mem_ctx, "(attributeId=%s)", OID);
+	if (expr == NULL) {
+		goto failed;
+	}
+
+	rc = ads_do_search_retry(ads, schema_path, LDAP_SCOPE_SUBTREE, 
+		expr, attrs, &res);
+	if (!ADS_ERR_OK(rc)) {
+		goto failed;
+	}
+
+	count = ads_count_replies(ads, res);
+	if (count == 0 || !res) {
+		goto failed;
+	}
+
+	result = ads_pull_string(ads, mem_ctx, res, "lDAPDisplayName");
+	ads_msgfree(ads, res);
+
+	return result;
+	
+failed:
+	DEBUG(0,("ads_get_attrname_by_oid: failed to retrieve name for oid: %s\n", 
+		OID));
+	
+	ads_msgfree(ads, res);
+	return NULL;
+}
+
+/*********************************************************************
+*********************************************************************/
+
+static ADS_STATUS ads_schema_path(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx, char **schema_path)
+{
+	ADS_STATUS status;
+	void *res;
+	const char *schema;
+	const char *attrs[] = { "schemaNamingContext", NULL };
+
+	status = ads_do_search(ads, "", LDAP_SCOPE_BASE, "(objectclass=*)", attrs, &res);
+	if (!ADS_ERR_OK(status)) {
+		return status;
+	}
+
+	if ( (schema = ads_pull_string(ads, mem_ctx, res, "schemaNamingContext")) == NULL ) {
+		return ADS_ERROR(LDAP_NO_RESULTS_RETURNED);
+	}
+
+	if ( (*schema_path = talloc_strdup(mem_ctx, schema)) == NULL ) {
+		return ADS_ERROR(LDAP_NO_MEMORY);
+	}
+
+	ads_msgfree(ads, res);
+
+	return status;
+}
+
+/**
+ * Check for "Services for Unix" or rfc2307 Schema and load some attributes into the ADS_STRUCT
+ * @param ads connection to ads server
+ * @param enum mapping type
+ * @return BOOL status of search (False if one or more attributes couldn't be
+ * found in Active Directory)
+ **/ 
+ADS_STATUS ads_check_posix_schema_mapping(ADS_STRUCT *ads, enum wb_posix_mapping map_type) 
+{
+	TALLOC_CTX *ctx = NULL; 
+	ADS_STATUS status;
+	char **oids_out, **names_out;
+	size_t num_names;
+	char *schema_path = NULL;
+	ADS_STRUCT *ads_s = ads;
+	int i;
+
+	const char *oids_sfu[] = { 	ADS_ATTR_SFU_UIDNUMBER_OID,
+					ADS_ATTR_SFU_GIDNUMBER_OID,
+					ADS_ATTR_SFU_HOMEDIR_OID,
+					ADS_ATTR_SFU_SHELL_OID,
+					ADS_ATTR_SFU_GECOS_OID};
+
+	const char *oids_rfc2307[] = {	ADS_ATTR_RFC2307_UIDNUMBER_OID,
+					ADS_ATTR_RFC2307_GIDNUMBER_OID,
+					ADS_ATTR_RFC2307_HOMEDIR_OID,
+					ADS_ATTR_RFC2307_SHELL_OID,
+					ADS_ATTR_RFC2307_GECOS_OID };
+
+	DEBUG(10,("ads_check_posix_schema_mapping\n"));
+
+	switch (map_type) {
+	
+		case WB_POSIX_MAP_TEMPLATE:
+		case WB_POSIX_MAP_UNIXINFO:
+			DEBUG(10,("ads_check_posix_schema_mapping: nothing to do\n"));
+			return ADS_ERROR(LDAP_SUCCESS);
+
+		case WB_POSIX_MAP_SFU:
+		case WB_POSIX_MAP_RFC2307:
+			break;
+
+		default:
+			DEBUG(0,("ads_check_posix_schema_mapping: "
+				 "unknown enum %d\n", map_type));
+			return ADS_ERROR(LDAP_PARAM_ERROR);
+	}
+
+	ads->schema.posix_uidnumber_attr = NULL;
+	ads->schema.posix_gidnumber_attr = NULL;
+	ads->schema.posix_homedir_attr = NULL;
+	ads->schema.posix_shell_attr = NULL;
+	ads->schema.posix_gecos_attr = NULL;
+
+	ctx = talloc_init("ads_check_posix_schema_mapping");
+	if (ctx == NULL) {
+		return ADS_ERROR(LDAP_NO_MEMORY);
+	}
+
+	/* establish a new ldap tcp session if necessary */
+
+	if (!ads->ld) {
+		if ((ads_s = ads_init(ads->server.realm, ads->server.workgroup, 
+				      ads->server.ldap_server)) == NULL) {
+			status = ADS_ERROR(LDAP_SERVER_DOWN);
+			goto done;
+		}
+
+		ads_s->auth.flags = ADS_AUTH_ANON_BIND;
+		status = ads_connect(ads_s);
+		if (!ADS_ERR_OK(status)) {
+			goto done;
+		}
+	}
+
+	status = ads_schema_path(ads, ctx, &schema_path);
+	if (!ADS_ERR_OK(status)) {
+		DEBUG(3,("ads_check_posix_mapping: Unable to retrieve schema DN!\n"));
+		goto done;
+	}
+
+	if (map_type == WB_POSIX_MAP_SFU) {
+		status = ads_get_attrnames_by_oids(ads, ctx, schema_path, oids_sfu, 
+						   ARRAY_SIZE(oids_sfu), 
+						   &oids_out, &names_out, &num_names);
+	} else { 
+		status = ads_get_attrnames_by_oids(ads, ctx, schema_path, oids_rfc2307, 
+						   ARRAY_SIZE(oids_rfc2307), 
+						   &oids_out, &names_out, &num_names);
+	}
+
+	if (!ADS_ERR_OK(status)) {
+		DEBUG(3,("ads_check_posix_schema_mapping: failed %s\n", 
+			ads_errstr(status)));
+		goto done;
+	} 
+	
+	DEBUG(10,("ads_check_posix_schema_mapping: query succeeded, identified: %s\n",
+		wb_posix_map_str(map_type)));
+
+	for (i=0; i<num_names; i++) {
+
+		DEBUGADD(10,("\tOID %s has name: %s\n", oids_out[i], names_out[i]));
+
+		if (strequal(ADS_ATTR_RFC2307_UIDNUMBER_OID, oids_out[i]) ||
+		    strequal(ADS_ATTR_SFU_UIDNUMBER_OID, oids_out[i])) {
+			ads->schema.posix_uidnumber_attr = SMB_STRDUP(names_out[i]);
+		}
+		if (strequal(ADS_ATTR_RFC2307_GIDNUMBER_OID, oids_out[i]) ||
+		    strequal(ADS_ATTR_SFU_GIDNUMBER_OID, oids_out[i])) {
+			ads->schema.posix_gidnumber_attr = SMB_STRDUP(names_out[i]);
+		}
+		if (strequal(ADS_ATTR_RFC2307_HOMEDIR_OID, oids_out[i]) ||
+		    strequal(ADS_ATTR_SFU_HOMEDIR_OID, oids_out[i])) {
+			ads->schema.posix_homedir_attr = SMB_STRDUP(names_out[i]);
+		}
+		if (strequal(ADS_ATTR_RFC2307_SHELL_OID, oids_out[i]) ||
+		    strequal(ADS_ATTR_SFU_SHELL_OID, oids_out[i])) {
+			ads->schema.posix_shell_attr = SMB_STRDUP(names_out[i]);
+		}
+		if (strequal(ADS_ATTR_RFC2307_GECOS_OID, oids_out[i]) ||
+		    strequal(ADS_ATTR_SFU_GECOS_OID, oids_out[i])) {
+			ads->schema.posix_gecos_attr = SMB_STRDUP(names_out[i]);
+		}
+	}
+
+	talloc_destroy(ctx);
+	
+	ADS_ERROR_HAVE_NO_MEMORY(ads->schema.posix_uidnumber_attr);
+	ADS_ERROR_HAVE_NO_MEMORY(ads->schema.posix_gidnumber_attr);
+	ADS_ERROR_HAVE_NO_MEMORY(ads->schema.posix_homedir_attr);
+	ADS_ERROR_HAVE_NO_MEMORY(ads->schema.posix_shell_attr);
+	ADS_ERROR_HAVE_NO_MEMORY(ads->schema.posix_gecos_attr);
+	
+	status = ADS_ERROR(LDAP_SUCCESS);
+	
+	ads->schema.map_type = map_type;
+done:
+	/* free any temporary ads connections */
+	if (ads_s != ads) {
+		ads_destroy(&ads_s);
+	}
+	if (ctx) {
+		talloc_destroy(ctx);
+	}
+
+	return status;
+}
+
+#endif