r5584: add new experimental ldb module

(This used to be commit e77a070c841c7a1b73dfcea2d43651618557d0f4)

1 files changed, 512 insertions, 0 deletions

diff --git a/source4/dsdb/samdb/ldb_modules/samldb.c b/source4/dsdb/samdb/ldb_modules/samldb.c
new file mode 100644
index 0000000000..6b8546e2b8
--- /dev/null
+++ b/source4/dsdb/samdb/ldb_modules/samldb.c
@@ -0,0 +1,512 @@
+/* 
+   ldb database library
+
+   Copyright (C) Simo Sorce  2004
+
+     ** NOTE! The following LGPL license applies to the ldb
+     ** library. This does NOT imply that all of Samba is released
+     ** under the LGPL
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+/*
+ *  Name: ldb
+ *
+ *  Component: ldb samldb module
+ *
+ *  Description: add object timestamping functionality
+ *
+ *  Author: Simo Sorce
+ */
+
+#include "includes.h"
+#include "lib/ldb/include/ldb.h"
+#include "lib/ldb/include/ldb_private.h"
+#include <time.h>
+
+#define SAM_ACCOUNT_NAME_BASE "$000000-000000000000"
+
+struct private_data {
+	const char *error_string;
+};
+
+static int samldb_search(struct ldb_module *module, const char *base,
+				  enum ldb_scope scope, const char *expression,
+				  const char * const *attrs, struct ldb_message ***res)
+{
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_search\n");
+	return ldb_next_search(module, base, scope, expression, attrs, res);
+}
+
+static int samldb_search_free(struct ldb_module *module, struct ldb_message **res)
+{
+ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_search_free\n");
+	return ldb_next_search_free(module, res);
+}
+
+static char *samldb_generate_samAccountName(const void *mem_ctx) {
+	char *name;
+
+	name = talloc_strdup(mem_ctx, SAM_ACCOUNT_NAME_BASE);
+	/* TODO: randomize name */	
+
+	return name;
+}
+
+static BOOL samldb_get_rdn_and_basedn(const void *mem_ctx, const char *dn, char **rdn, char **basedn)
+{
+	char *p;
+
+	p = strchr(dn, ',');
+	if ( ! p ) {
+		return False;
+	}
+	/* clear separator */
+	*p = '\0';
+
+	*rdn = talloc_strdup(mem_ctx, dn);
+
+	/* put back separator */
+	*p = ',';
+
+	if ( ! *rdn) {
+		return False;
+	}
+
+	*basedn = talloc_strdup(mem_ctx, p + 1);
+
+	if ( ! *basedn) {
+		talloc_free(*rdn);
+		*rdn = NULL;
+		return False;
+	}
+
+	return True;
+}
+
+/* if value is not null also check for attribute to have exactly that value */
+static struct ldb_message_element *samldb_find_attribute(const struct ldb_message *msg, const char *name, const char *value)
+{
+	int i, j;
+
+	for (i = 0; i < msg->num_elements; i++) {
+		if (ldb_attr_cmp(name, msg->elements[i].name) == 0) {
+			if (!value) {
+				return &msg->elements[i];
+			}
+			for (j = 0; j < msg->elements[i].num_values; j++) {
+				if (strcasecmp(value, msg->elements[i].values[j].data) == 0) {
+					return &msg->elements[i];
+				}
+			}
+		}
+	}
+
+	return NULL;
+}
+
+static BOOL samldb_add_attribute(struct ldb_message *msg, const char *name, const char *value)
+{
+	struct ldb_message_element *attr;
+	int i;
+
+	attr = samldb_find_attribute(msg, name, NULL);
+	if ( ! attr) {
+		msg->num_elements++;
+		msg->elements = talloc_realloc(msg, msg->elements, struct ldb_message_element, msg->num_elements);
+		if ( ! msg->elements ) {
+			return False;
+		}
+		attr = &msg->elements[msg->num_elements - 1];
+
+		attr->name = talloc_strdup(msg, name);
+		if ( ! attr->name ) {
+			return False;
+		}
+		attr->flags = 0;
+		attr->num_values = 0;
+		attr->values = NULL;
+	}
+
+	i = attr->num_values;
+	attr->num_values++;
+	attr->values = talloc_realloc(msg, attr->values, struct ldb_val, attr->num_values);
+	if ( ! attr->values ){
+		return False;
+	}
+
+	attr->values[i].data = talloc_strdup(msg, value);
+	attr->values[i].length = strlen(value);
+
+	if ( ! attr->values[i].data) {
+		return False;
+	}
+
+	return True;
+}
+
+static BOOL samldb_find_or_add_attribute(struct ldb_message *msg, const char *name, const char *value, const char *set_value)
+{
+	if (samldb_find_attribute(msg, name, value) == NULL) {
+		if ( ! samldb_add_attribute(msg, name, set_value)) {
+			return False;
+		}
+	}
+	return True;
+}
+
+static struct ldb_message *samldb_manage_group_object(struct ldb_module *module, const struct ldb_message *msg)
+{
+	struct ldb_message *msg2;
+	struct ldb_message_element *attribute;
+	char *rdn, *basedn;
+	int i;
+
+	if (samldb_find_attribute(msg, "objectclass", "group") == NULL) {
+		return NULL;
+	}
+
+	msg2 = talloc(module, struct ldb_message);
+	if (!msg2) {
+		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_manage_group_object: talloc failed!\n");
+		return NULL;
+	}
+
+	/* build the new msg */
+	msg2->dn = msg->dn;
+	msg2->num_elements = msg->num_elements;
+	msg2->private_data = msg->private_data;
+	msg2->elements = talloc_array(msg2, struct ldb_message_element, msg2->num_elements);
+	if (! msg2->elements) {
+		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_manage_group_object: talloc_array failed!\n");
+		talloc_free(msg2);
+		return NULL;
+	}
+	for (i = 0; i < msg2->num_elements; i++) {
+		msg2->elements[i] = msg->elements[i];
+	}
+
+	if ( ! samldb_get_rdn_and_basedn(msg2, msg2->dn, &rdn, &basedn)) {
+		talloc_free(msg2);
+		return NULL;
+	}
+	if (strncasecmp(rdn, "cn", 2) != 0) {
+		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_manage_group_object: Bad RDN (%s) for group!\n", rdn);
+		talloc_free(msg2);
+		return NULL;
+	}
+
+	if (! samldb_find_or_add_attribute(msg2, "objectclass", "top", "top")) {
+		talloc_free(msg2);
+		return NULL;
+	}
+
+	if ((attribute = samldb_find_attribute(msg2, "cn", NULL)) != NULL) {
+		if (strcasecmp(rdn, attribute->values[0].data) != 0) {
+			ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_manage_group_object: Bad Attribute Syntax for CN\n");
+			talloc_free(msg2);
+			return NULL;
+		}
+	} else { /* FIXME: remove this if ldb supports natively aliasing between the rdn and the "cn" attribute */
+		if ( ! samldb_add_attribute(msg2, "cn", &rdn[3])) {
+			talloc_free(msg2);
+			return NULL;
+		}
+	}
+
+	if ((attribute = samldb_find_attribute(msg2, "name", NULL)) != NULL) {
+		if (strcasecmp(rdn, attribute->values[0].data) != 0) {
+			ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_manage_group_object: Bad Attribute Syntax for name\n");
+			talloc_free(msg2);
+			return NULL;
+		}
+	} else { /* FIXME: remove this if ldb supports natively aliasing between the rdn and the "name" attribute */
+		if ( ! samldb_add_attribute(msg2, "name", &rdn[3])) {
+			talloc_free(msg2);
+			return NULL;
+		}
+	}
+
+	if ( ! samldb_find_or_add_attribute(msg2, "instanceType", NULL, "4")) {
+		return NULL;
+	}
+
+	if ( ! samldb_find_or_add_attribute(msg2, "sAMAccountName", NULL, samldb_generate_samAccountName(msg2))) {
+		return NULL;
+	}
+
+	if ( ! samldb_find_or_add_attribute(msg2, "sAMAccountType", NULL, "268435456")) {
+		return NULL;
+	}
+
+	if ( ! samldb_find_or_add_attribute(msg2, "groupType", NULL, "-2147483646")) {
+		return NULL;
+	}
+
+	if ( ! samldb_find_or_add_attribute(msg2, "objectCategory", NULL, "foo")) { /* keep the schema module happy :) */
+		return NULL;
+	}
+
+	if ( ! samldb_find_or_add_attribute(msg2, "objectSid", NULL, "foo")) { /* keep the schema module happy :) */
+		return NULL;
+	}
+
+	/* TODO: objectGUID, objectSid, objectCategory */
+	/* need a way to lock a new Sid */
+
+	return msg2;
+}
+
+static struct ldb_message *samldb_manage_user_object(struct ldb_module *module, const struct ldb_message *msg)
+{
+	struct ldb_message *msg2;
+	struct ldb_message_element *attribute;
+	char *rdn, *basedn;
+	int i;
+
+	if (samldb_find_attribute(msg, "objectclass", "user") == NULL) {
+		return NULL;
+	}
+
+	msg2 = talloc(module, struct ldb_message);
+	if (!msg2) {
+		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_manage_user_object: talloc failed!\n");
+		return NULL;
+	}
+
+	/* build the new msg */
+	msg2->dn = msg->dn;
+	msg2->num_elements = msg->num_elements;
+	msg2->private_data = msg->private_data;
+	msg2->elements = talloc_array(msg2, struct ldb_message_element, msg2->num_elements);
+	if (! msg2->elements) {
+		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_manage_user_object: talloc_array failed!\n");
+		talloc_free(msg2);
+		return NULL;
+	}
+	for (i = 0; i < msg2->num_elements; i++) {
+		msg2->elements[i] = msg->elements[i];
+	}
+
+	if ( ! samldb_get_rdn_and_basedn(msg2, msg2->dn, &rdn, &basedn)) {
+		talloc_free(msg2);
+		return NULL;
+	}
+	if (strncasecmp(rdn, "cn", 2) != 0) {
+		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_manage_group_object: Bad RDN (%s) for group!\n", rdn);
+		talloc_free(msg2);
+		return NULL;
+	}
+
+
+	if ( ! samldb_find_or_add_attribute(msg2, "objectclass", "top", "top")) {
+		talloc_free(msg2);
+		return NULL;
+	}
+
+	if ( ! samldb_find_or_add_attribute(msg2, "objectclass", "person", "person")) {
+		talloc_free(msg2);
+		return NULL;
+	}
+
+	if ( ! samldb_find_or_add_attribute(msg2, "objectclass", "organizationalPerson", "organizationalPerson")) {
+		talloc_free(msg2);
+		return NULL;
+	}
+
+	if ((attribute = samldb_find_attribute(msg2, "cn", NULL)) != NULL) {
+		if (strcasecmp(rdn, attribute->values[0].data) != 0) {
+			ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_manage_user_object: Bad Attribute Syntax for CN\n");
+			talloc_free(msg2);
+			return NULL;
+		}
+	} else { /* FIXME: remove this if ldb supports natively aliasing between the rdn and the "cn" attribute */
+		if ( ! samldb_add_attribute(msg2, "cn", &rdn[3])) {
+			talloc_free(msg2);
+			return NULL;
+		}
+	}
+
+	if ((attribute = samldb_find_attribute(msg2, "name", NULL)) != NULL) {
+		if (strcasecmp(rdn, attribute->values[0].data) != 0) {
+			ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_manage_user_object: Bad Attribute Syntax for name\n");
+			talloc_free(msg2);
+			return NULL;
+		}
+	} else { /* FIXME: remove this if ldb supports natively aliasing between the rdn and the "name" attribute */
+		if ( ! samldb_add_attribute(msg2, "name", &rdn[3])) {
+			talloc_free(msg2);
+			return NULL;
+		}
+	}
+
+	if ( ! samldb_find_or_add_attribute(msg2, "instanceType", NULL, "4")) {
+		talloc_free(msg2);
+		return NULL;
+	}
+
+	if ( ! samldb_find_or_add_attribute(msg2, "sAMAccountName", NULL, samldb_generate_samAccountName(msg2))) {
+		talloc_free(msg2);
+		return NULL;
+	}
+
+	if ( ! samldb_find_or_add_attribute(msg2, "sAMAccountType", NULL, "805306368")) {
+		talloc_free(msg2);
+		return NULL;
+	}
+
+	if ( ! samldb_find_or_add_attribute(msg2, "objectCategory", NULL, "foo")) { /* keep the schema module happy :) */
+		return NULL;
+	}
+
+	if ( ! samldb_find_or_add_attribute(msg2, "objectSid", NULL, "foo")) { /* keep the schema module happy :) */
+		return NULL;
+	}
+
+	/* TODO: objectGUID, objectSid, objectCategory, userAccountControl, badPwdCount, codePage, countryCode, badPasswordTime, lastLogoff, lastLogon, pwdLastSet, primaryGroupID, accountExpires, logonCount */
+
+	return msg2;
+}
+
+/* add_record */
+static int samldb_add_record(struct ldb_module *module, const struct ldb_message *msg)
+{
+	struct ldb_message *msg2 = NULL;
+	int ret;
+
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_add_record\n");
+
+	if (msg->dn[0] == '@') { /* do not manipulate our control entries */
+		return ldb_next_add_record(module, msg);
+	}
+
+	/* is group?  add all group relevant missing objects */
+	msg2 = samldb_manage_group_object(module, msg);
+
+	/* is user? add all user relevant missing objects */
+	if ( ! msg2 ) {
+		msg2 = samldb_manage_user_object(module, msg);
+	}
+
+	if (msg2) {
+		ret = ldb_next_add_record(module, msg2);
+		talloc_free(msg2);
+	} else {
+		ret = ldb_next_add_record(module, msg);
+	}
+
+	return ret;
+}
+
+/* modify_record: change modifyTimestamp as well */
+static int samldb_modify_record(struct ldb_module *module, const struct ldb_message *msg)
+{
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_modify_record\n");
+	return ldb_next_modify_record(module, msg);
+}
+
+static int samldb_delete_record(struct ldb_module *module, const char *dn)
+{
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_delete_record\n");
+	return ldb_next_delete_record(module, dn);
+}
+
+static int samldb_rename_record(struct ldb_module *module, const char *olddn, const char *newdn)
+{
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_rename_record\n");
+	return ldb_next_rename_record(module, olddn, newdn);
+}
+
+static int samldb_lock(struct ldb_module *module, const char *lockname)
+{
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_lock\n");
+	return ldb_next_named_lock(module, lockname);
+}
+
+static int samldb_unlock(struct ldb_module *module, const char *lockname)
+{
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_unlock\n");
+	return ldb_next_named_unlock(module, lockname);
+}
+
+/* return extended error information */
+static const char *samldb_errstring(struct ldb_module *module)
+{
+	struct private_data *data = (struct private_data *)module->private_data;
+
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_errstring\n");
+	if (data->error_string) {
+		const char *error;
+
+		error = data->error_string;
+		data->error_string = NULL;
+		return error;
+	}
+
+	return ldb_next_errstring(module);
+}
+
+static int samldb_destructor(void *module_ctx)
+{
+	struct ldb_module *ctx = module_ctx;
+	/* put your clean-up functions here */
+	return 0;
+}
+
+static const struct ldb_module_ops samldb_ops = {
+	"samldb",
+	samldb_search,
+	samldb_search_free,
+	samldb_add_record,
+	samldb_modify_record,
+	samldb_delete_record,
+	samldb_rename_record,
+	samldb_lock,
+	samldb_unlock,
+	samldb_errstring
+};
+
+
+/* the init function */
+#ifdef HAVE_DLOPEN_DISABLED
+ struct ldb_module *init_module(struct ldb_context *ldb, const char *options[])
+#else
+struct ldb_module *samldb_module_init(struct ldb_context *ldb, const char *options[])
+#endif
+{
+	struct ldb_module *ctx;
+	struct private_data *data;
+
+	ctx = talloc(ldb, struct ldb_module);
+	if (!ctx)
+		return NULL;
+
+	data = talloc(ctx, struct private_data);
+	if (!data) {
+		talloc_free(ctx);
+		return NULL;
+	}
+
+	data->error_string = NULL;
+	ctx->private_data = data;
+	ctx->ldb = ldb;
+	ctx->prev = ctx->next = NULL;
+	ctx->ops = &samldb_ops;
+
+	talloc_set_destructor(ctx, samldb_destructor);
+
+	return ctx;
+}