s4:LDB modules - remove the "kludge_acl" module code

Obviously this has been forgotten by Nadya.

1 files changed, 0 insertions, 516 deletions

diff --git a/source4/dsdb/samdb/ldb_modules/kludge_acl.c b/source4/dsdb/samdb/ldb_modules/kludge_acl.c
deleted file mode 100644
index e6f288d01c..0000000000
--- a/source4/dsdb/samdb/ldb_modules/kludge_acl.c
+++ /dev/null
@@ -1,516 +0,0 @@
-/* 
-   ldb database library
-
-   Copyright (C) Andrew Bartlett 2005
-   Copyright (C) Simo Sorce 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 3 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, see <http://www.gnu.org/licenses/>.
-*/
-
-/*
- *  Name: ldb
- *
- *  Component: ldb kludge ACL module
- *
- *  Description: Simple module to enforce a simple form of access
- *               control, sufficient for securing a default Samba4 
- *               installation.
- *
- *  Author: Andrew Bartlett
- */
-
-#include "includes.h"
-#include "ldb_module.h"
-#include "auth/auth.h"
-#include "libcli/security/security.h"
-#include "dsdb/samdb/samdb.h"
-#include "param/param.h"
-#include "lib/util/tsort.h"
-
-/* Kludge ACL rules:
- *
- * - System can read passwords
- * - Administrators can write anything
- * - Users can read anything that is not a password
- *
- */
-
-struct kludge_private_data {
-	const char **password_attrs;
-	bool acl_perform;
-};
-
-static enum security_user_level what_is_user(struct ldb_module *module) 
-{
-	struct ldb_context *ldb = ldb_module_get_ctx(module);
-	struct auth_session_info *session_info
-		= (struct auth_session_info *)ldb_get_opaque(ldb, "sessionInfo");
-	return security_session_user_level(session_info, NULL);
-}
-
-static const char *user_name(TALLOC_CTX *mem_ctx, struct ldb_module *module) 
-{
-	struct ldb_context *ldb = ldb_module_get_ctx(module);
-	struct auth_session_info *session_info
-		= (struct auth_session_info *)ldb_get_opaque(ldb, "sessionInfo");
-	if (!session_info) {
-		return "UNKNOWN (NULL)";
-	}
-	
-	return talloc_asprintf(mem_ctx, "%s\\%s",
-			       session_info->server_info->domain_name,
-			       session_info->server_info->account_name);
-}
-
-/* search */
-struct kludge_acl_context {
-
-	struct ldb_module *module;
-	struct ldb_request *req;
-
-	enum security_user_level user_type;
-	bool allowedAttributes;
-	bool allowedAttributesEffective;
-	bool allowedChildClasses;
-	bool allowedChildClassesEffective;
-	const char * const *attrs;
-};
-
-/* read all objectClasses */
-
-static int kludge_acl_allowedAttributes(struct ldb_context *ldb, struct ldb_message *msg,
-					const char *attrName) 
-{
-	struct ldb_message_element *oc_el;
-	struct ldb_message_element *allowedAttributes;
-	/* We need to ensure that the strings returned are valid for as long as the msg is valid */
-	const struct dsdb_schema *schema = dsdb_get_schema(ldb, msg);
-	TALLOC_CTX *mem_ctx;
-	const char **attr_list;
-	unsigned int i;
-	int ret;
-
- 	/* If we don't have a schema yet, we can't do anything... */
-	if (schema == NULL) {
-		return LDB_SUCCESS;
-	}
-
-	/* Must remove any existing attribute, or else confusion reins */
-	ldb_msg_remove_attr(msg, attrName);
-	ret = ldb_msg_add_empty(msg, attrName, 0, &allowedAttributes);
-	if (ret != LDB_SUCCESS) {
-		return ret;
-	}
-	
-	mem_ctx = talloc_new(msg);
-	if (!mem_ctx) {
-		return ldb_oom(ldb);
-	}
-
-	/* To ensure that oc_el is valid, we must look for it after 
-	   we alter the element array in ldb_msg_add_empty() */
-	oc_el = ldb_msg_find_element(msg, "objectClass");
-	
-	attr_list = dsdb_full_attribute_list(mem_ctx, schema, oc_el, DSDB_SCHEMA_ALL);
-	if (!attr_list) {
-		ldb_asprintf_errstring(ldb, "kludge_acl: Failed to get list of attributes create %s attribute", attrName);
-		talloc_free(mem_ctx);
-		return LDB_ERR_OPERATIONS_ERROR;
-	}
-
-	for (i=0; attr_list && attr_list[i]; i++) {
-		ldb_msg_add_string(msg, attrName, attr_list[i]);
-	}
-	talloc_free(mem_ctx);
-	return LDB_SUCCESS;
-
-}
-/* read all objectClasses */
-
-static int kludge_acl_childClasses(struct ldb_context *ldb, struct ldb_message *msg,
-				   const char *attrName) 
-{
-	struct ldb_message_element *oc_el;
-	struct ldb_message_element *allowedClasses;
-
-	/* We need to ensure that the strings returned are valid for as long as the msg is valid */
-	const struct dsdb_schema *schema = dsdb_get_schema(ldb, msg);
-	const struct dsdb_class *sclass;
-	unsigned int i, j;
-	int ret;
-
- 	/* If we don't have a schema yet, we can't do anything... */
-	if (schema == NULL) {
-		return LDB_SUCCESS;
-	}
-
-	/* Must remove any existing attribute, or else confusion reins */
-	ldb_msg_remove_attr(msg, attrName);
-	ret = ldb_msg_add_empty(msg, attrName, 0, &allowedClasses);
-	if (ret != LDB_SUCCESS) {
-		return ret;
-	}
-	
-	/* To ensure that oc_el is valid, we must look for it after 
-	   we alter the element array in ldb_msg_add_empty() */
-	oc_el = ldb_msg_find_element(msg, "objectClass");
-
-	for (i=0; oc_el && i < oc_el->num_values; i++) {
-		sclass = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &oc_el->values[i]);
-		if (!sclass) {
-			/* We don't know this class?  what is going on? */
-			continue;
-		}
-
-		for (j=0; sclass->possibleInferiors && sclass->possibleInferiors[j]; j++) {
-			ldb_msg_add_string(msg, attrName, sclass->possibleInferiors[j]);
-		}
-	}
-		
-	if (allowedClasses->num_values > 1) {
-		TYPESAFE_QSORT(allowedClasses->values, allowedClasses->num_values, data_blob_cmp);
-	
-		for (i=1 ; i < allowedClasses->num_values; i++) {
-
-			struct ldb_val *val1 = &allowedClasses->values[i-1];
-			struct ldb_val *val2 = &allowedClasses->values[i];
-			if (data_blob_cmp(val1, val2) == 0) {
-				memmove(val1, val2, (allowedClasses->num_values - i) * sizeof( struct ldb_val)); 
-				allowedClasses->num_values--;
-				i--;
-			}
-		}
-	}
-
-	return LDB_SUCCESS;
-}
-
-/* find all attributes allowed by all these objectClasses */
-
-static int kludge_acl_callback(struct ldb_request *req, struct ldb_reply *ares)
-{
-	struct ldb_context *ldb;
-	struct kludge_acl_context *ac;
-	struct kludge_private_data *data;
-	unsigned int i;
-	int ret;
-
-	ac = talloc_get_type(req->context, struct kludge_acl_context);
-	data = talloc_get_type(ldb_module_get_private(ac->module), struct kludge_private_data);
-	ldb = ldb_module_get_ctx(ac->module);
-
-	if (!ares) {
-		return ldb_module_done(ac->req, NULL, NULL,
-					LDB_ERR_OPERATIONS_ERROR);
-	}
-	if (ares->error != LDB_SUCCESS) {
-		return ldb_module_done(ac->req, ares->controls,
-					ares->response, ares->error);
-	}
-
-	switch (ares->type) {
-	case LDB_REPLY_ENTRY:
-		if (ac->allowedAttributes) {
-			ret = kludge_acl_allowedAttributes(ldb,
-						   ares->message,
-						   "allowedAttributes");
-			if (ret != LDB_SUCCESS) {
-				return ldb_module_done(ac->req, NULL, NULL, ret);
-			}
-		}
-		if (ac->allowedChildClasses) {
-			ret = kludge_acl_childClasses(ldb,
-						ares->message,
-						"allowedChildClasses");
-			if (ret != LDB_SUCCESS) {
-				return ldb_module_done(ac->req, NULL, NULL, ret);
-			}
-		}
-
-		if (data && data->password_attrs) /* if we are not initialized just get through */
-		{
-			switch (ac->user_type) {
-			case SECURITY_SYSTEM:
-				if (ac->allowedAttributesEffective) {
-					ret = kludge_acl_allowedAttributes(ldb, ares->message,
-									"allowedAttributesEffective");
-					if (ret != LDB_SUCCESS) {
-						return ldb_module_done(ac->req, NULL, NULL, ret);
-					}
-				}
-				if (ac->allowedChildClassesEffective) {
-					ret = kludge_acl_childClasses(ldb, ares->message,
-									"allowedChildClassesEffective");
-					if (ret != LDB_SUCCESS) {
-						return ldb_module_done(ac->req, NULL, NULL, ret);
-					}
-				}
-				break;
-
-			case SECURITY_ADMINISTRATOR:
-				if (ac->allowedAttributesEffective) {
-					ret = kludge_acl_allowedAttributes(ldb, ares->message,
-									"allowedAttributesEffective");
-					if (ret != LDB_SUCCESS) {
-						return ldb_module_done(ac->req, NULL, NULL, ret);
-					}
-				}
-				if (ac->allowedChildClassesEffective) {
-					ret = kludge_acl_childClasses(ldb, ares->message,
-									"allowedChildClassesEffective");
-					if (ret != LDB_SUCCESS) {
-						return ldb_module_done(ac->req, NULL, NULL, ret);
-					}
-				}
-				/* fall through */
-			default:
-				/* remove password attributes */
-				for (i = 0; data->password_attrs[i]; i++) {
-					ldb_msg_remove_attr(ares->message, data->password_attrs[i]);
-				}
-			}
-		}
-
-		if (ac->allowedAttributes ||
-		    ac->allowedAttributesEffective ||
-		    ac->allowedChildClasses ||
-		    ac->allowedChildClassesEffective) {
-
-			if (!ldb_attr_in_list(ac->attrs, "objectClass") &&
-		            !ldb_attr_in_list(ac->attrs, "*")) {
-
-				ldb_msg_remove_attr(ares->message,
-						    "objectClass");
-			}
-		}
-
-		return ldb_module_send_entry(ac->req, ares->message, ares->controls);
-
-	case LDB_REPLY_REFERRAL:
-		return ldb_module_send_referral(ac->req, ares->referral);
-
-	case LDB_REPLY_DONE:
-		return ldb_module_done(ac->req, ares->controls,
-					ares->response, LDB_SUCCESS);
-
-	}
-	return LDB_SUCCESS;
-}
-
-static int kludge_acl_search(struct ldb_module *module, struct ldb_request *req)
-{
-	struct ldb_context *ldb;
-	struct kludge_acl_context *ac;
-	struct ldb_request *down_req;
-	struct kludge_private_data *data;
-	const char * const *attrs;
-	int ret;
-	unsigned int i;
-
-	ldb = ldb_module_get_ctx(module);
-
-	ac = talloc(req, struct kludge_acl_context);
-	if (ac == NULL) {
-		return ldb_oom(ldb);
-	}
-
-	data = talloc_get_type(ldb_module_get_private(module), struct kludge_private_data);
-
-	if (data && data->acl_perform)
-		return ldb_next_request(module, req);
-
-	ac->module = module;
-	ac->req = req;
-	ac->user_type = what_is_user(module);
-	ac->attrs = req->op.search.attrs;
-
-	ac->allowedAttributes = ldb_attr_in_list(req->op.search.attrs, "allowedAttributes");
-
-	ac->allowedAttributesEffective = ldb_attr_in_list(req->op.search.attrs, "allowedAttributesEffective");
-
-	ac->allowedChildClasses = ldb_attr_in_list(req->op.search.attrs, "allowedChildClasses");
-
-	ac->allowedChildClassesEffective = ldb_attr_in_list(req->op.search.attrs, "allowedChildClassesEffective");
-
-	if (ac->allowedAttributes || ac->allowedAttributesEffective || ac->allowedChildClasses || ac->allowedChildClassesEffective) {
-		attrs = ldb_attr_list_copy_add(ac, req->op.search.attrs, "objectClass");
-	} else {
-		attrs = req->op.search.attrs;
-	}
-
-	/* replace any attributes in the parse tree that are private,
-	   so we don't allow a search for 'userPassword=penguin',
-	   just as we would not allow that attribute to be returned */
-	switch (ac->user_type) {
-	case SECURITY_SYSTEM:
-		break;
-	default:
-	/* FIXME: We should copy the tree and keep the original unmodified. */
-		/* remove password attributes */
-
-		if (!data || !data->password_attrs) {
-			break;
-		}
-		for (i = 0; data->password_attrs[i]; i++) {
-			ldb_parse_tree_attr_replace(req->op.search.tree,
-						    data->password_attrs[i],
-						    "kludgeACLredactedattribute");
-		}
-	}
-
-	ret = ldb_build_search_req_ex(&down_req,
-					ldb, ac,
-					req->op.search.base,
-					req->op.search.scope,
-					req->op.search.tree,
-					attrs,
-					req->controls,
-					ac, kludge_acl_callback,
-					req);
-	if (ret != LDB_SUCCESS) {
-		return ret;
-	}
-
-	/* perform the search */
-	return ldb_next_request(module, down_req);
-}
-
-/* ANY change type */
-static int kludge_acl_change(struct ldb_module *module, struct ldb_request *req)
-{
-	struct ldb_context *ldb = ldb_module_get_ctx(module);
-	enum security_user_level user_type = what_is_user(module);
-	struct kludge_private_data *data = talloc_get_type(ldb_module_get_private(module),
-							   struct kludge_private_data);
-
-	if (data->acl_perform)
-		return ldb_next_request(module, req);
-
-	switch (user_type) {
-	case SECURITY_SYSTEM:
-	case SECURITY_ADMINISTRATOR:
-		return ldb_next_request(module, req);
-	default:
-		ldb_asprintf_errstring(ldb,
-				       "kludge_acl_change: "
-				       "attempted database modify not permitted. "
-				       "User %s is not SYSTEM or an administrator",
-				       user_name(req, module));
-		return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
-	}
-}
-
-static int kludge_acl_extended(struct ldb_module *module, struct ldb_request *req)
-{
-	struct ldb_context *ldb = ldb_module_get_ctx(module);
-	enum security_user_level user_type;
-
-	/* allow everybody to read the sequence number */
-	if (strcmp(req->op.extended.oid,
-		   LDB_EXTENDED_SEQUENCE_NUMBER) == 0) {
-		return ldb_next_request(module, req);
-	}
-
-	user_type = what_is_user(module);
-
-	switch (user_type) {
-	case SECURITY_SYSTEM:
-	case SECURITY_ADMINISTRATOR:
-		return ldb_next_request(module, req);
-	default:
-		ldb_asprintf_errstring(ldb,
-				       "kludge_acl_change: "
-				       "attempted database modify not permitted. "
-				       "User %s is not SYSTEM or an administrator",
-				       user_name(req, module));
-		return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
-	}
-}
-
-static int kludge_acl_init(struct ldb_module *module)
-{
-	struct ldb_context *ldb;
-	int ret;
-	unsigned int i;
-	TALLOC_CTX *mem_ctx = talloc_new(module);
-	static const char *attrs[] = { "passwordAttribute", NULL };
-	struct ldb_result *res;
-	struct ldb_message *msg;
-	struct ldb_message_element *password_attributes;
-
-	struct kludge_private_data *data;
-
-	ldb = ldb_module_get_ctx(module);
-
-	data = talloc(module, struct kludge_private_data);
-	if (data == NULL) {
-		return ldb_oom(ldb);
-	}
-
-	data->password_attrs = NULL;
-	data->acl_perform = lpcfg_parm_bool(ldb_get_opaque(ldb, "loadparm"),
-					 NULL, "acl", "perform", false);
-	ldb_module_set_private(module, data);
-
-	if (!mem_ctx) {
-		return ldb_oom(ldb);
-	}
-
-	ret = ldb_search(ldb, mem_ctx, &res,
-			 ldb_dn_new(mem_ctx, ldb, "@KLUDGEACL"),
-			 LDB_SCOPE_BASE, attrs, NULL);
-	if (ret != LDB_SUCCESS) {
-		goto done;
-	}
-	if (res->count == 0) {
-		goto done;
-	}
-
-	if (res->count > 1) {
-		talloc_free(mem_ctx);
-		return LDB_ERR_CONSTRAINT_VIOLATION;
-	}
-
-	msg = res->msgs[0];
-
-	password_attributes = ldb_msg_find_element(msg, "passwordAttribute");
-	if (!password_attributes) {
-		goto done;
-	}
-	data->password_attrs = talloc_array(data, const char *, password_attributes->num_values + 1);
-	if (!data->password_attrs) {
-		talloc_free(mem_ctx);
-		return ldb_oom(ldb);
-	}
-	for (i=0; i < password_attributes->num_values; i++) {
-		data->password_attrs[i] = (const char *)password_attributes->values[i].data;	
-		talloc_steal(data->password_attrs, password_attributes->values[i].data);
-	}
-	data->password_attrs[i] = NULL;
-
-done:
-	talloc_free(mem_ctx);
-	return ldb_next_init(module);
-}
-
-_PUBLIC_ const struct ldb_module_ops ldb_kludge_acl_module_ops = {
-	.name		   = "kludge_acl",
-/*	.search            = kludge_acl_search, 
-	.add               = kludge_acl_change,
-	.modify            = kludge_acl_change,
-	.del               = kludge_acl_change,
-	.rename            = kludge_acl_change, */
-	.extended          = kludge_acl_extended,
-	.init_context	   = kludge_acl_init
-};