ldb.c

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	struct ldb_context *wrap;
	struct ldb_message *attrs_msg;

	if (location == NULL)
		return WERR_INVALID_PARAM;

	wrap = ldb_wrap_connect(parent_ctx, ev_ctx, lp_ctx,
				location, session_info, credentials, 0, NULL);

	if (wrap == NULL) {
		DEBUG(1, (__FILE__": unable to connect\n"));
		return WERR_FOOBAR;
	}

	attrs_msg = ldb_msg_new(wrap);
	W_ERROR_HAVE_NO_MEMORY(attrs_msg);
	attrs_msg->dn = ldb_dn_new(attrs_msg, wrap, "@ATTRIBUTES");
	W_ERROR_HAVE_NO_MEMORY(attrs_msg->dn);
	ldb_msg_add_string(attrs_msg, "key", "CASE_INSENSITIVE");
	ldb_msg_add_string(attrs_msg, "value", "CASE_INSENSITIVE");

	ldb_add(wrap, attrs_msg);

	ldb_set_debug_stderr(wrap);

	kd = talloc_zero(parent_ctx, struct ldb_key_data);
	kd->key.ops = &reg_backend_ldb;
	kd->ldb = talloc_reference(kd, wrap);
	talloc_set_destructor (kd, reg_close_ldb_key);
	kd->dn = ldb_dn_new(kd, wrap, "hive=NONE");

	*k = (struct hive_key *)kd;

	return WERR_OK;
}

static WERROR ldb_add_key(TALLOC_CTX *mem_ctx, const struct hive_key *parent,
			  const char *name, const char *classname,
			  struct security_descriptor *sd,
			  struct hive_key **newkey)
{
	struct ldb_key_data *parentkd = discard_const_p(struct ldb_key_data, parent);
	struct ldb_message *msg;
	struct ldb_key_data *newkd;
	int ret;

	msg = ldb_msg_new(mem_ctx);

	msg->dn = reg_path_to_ldb(msg, parent, name, NULL);

	ldb_msg_add_string(msg, "key", talloc_strdup(mem_ctx, name));
	if (classname != NULL)
		ldb_msg_add_string(msg, "classname",
				   talloc_strdup(mem_ctx, classname));

	ret = ldb_add(parentkd->ldb, msg);
	if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
		return WERR_ALREADY_EXISTS;
	}

	if (ret != LDB_SUCCESS) {
		DEBUG(1, ("ldb_add: %s\n", ldb_errstring(parentkd->ldb)));
		return WERR_FOOBAR;
	}

	DEBUG(2, ("key added: %s\n", ldb_dn_get_linearized(msg->dn)));

	newkd = talloc_zero(mem_ctx, struct ldb_key_data);
	newkd->ldb = talloc_reference(newkd, parentkd->ldb);
	newkd->key.ops = &reg_backend_ldb;
	newkd->dn = talloc_steal(newkd, msg->dn);

	*newkey = (struct hive_key *)newkd;

	/* reset cache */
	talloc_free(parentkd->subkeys);
	parentkd->subkeys = NULL;

	return WERR_OK;
}

static WERROR ldb_del_value (struct hive_key *key, const char *child)
{
	int ret;
	struct ldb_key_data *kd = talloc_get_type(key, struct ldb_key_data);
	struct ldb_dn *childdn;

	childdn = ldb_dn_copy(kd->ldb, kd->dn);
	if (!ldb_dn_add_child_fmt(childdn, "value=%s",
				  reg_ldb_escape(childdn, child)))
	{
		talloc_free(childdn);
		return WERR_FOOBAR;
	}

	ret = ldb_delete(kd->ldb, childdn);

	talloc_free(childdn);

	if (ret == LDB_ERR_NO_SUCH_OBJECT) {
		return WERR_BADFILE;
	} else if (ret != LDB_SUCCESS) {
		DEBUG(1, ("ldb_del_value: %s\n", ldb_errstring(kd->ldb)));
		return WERR_FOOBAR;
	}

	/* reset cache */
	talloc_free(kd->values);
	kd->values = NULL;

	return WERR_OK;
}

static WERROR ldb_del_key(const struct hive_key *key, const char *name)
{
	int i, ret;
	struct ldb_key_data *parentkd = talloc_get_type(key, struct ldb_key_data);
	struct ldb_dn *ldap_path;
	TALLOC_CTX *mem_ctx = talloc_init("ldb_del_key");
	struct ldb_context *c = parentkd->ldb;
	struct ldb_result *res_keys;
	struct ldb_result *res_vals;
	WERROR werr;
	struct hive_key *hk;

	/* Verify key exists by opening it */
	werr = ldb_open_key(mem_ctx, key, name, &hk);
	if (!W_ERROR_IS_OK(werr)) {
		talloc_free(mem_ctx);
		return werr;
	}

	ldap_path = reg_path_to_ldb(mem_ctx, key, name, NULL);
	if (!ldap_path) {
		talloc_free(mem_ctx);
		return WERR_FOOBAR;
	}

	/* Search for subkeys */
	ret = ldb_search(c, ldap_path, LDB_SCOPE_ONELEVEL,
			 "(key=*)", NULL, &res_keys);

	if (ret != LDB_SUCCESS) {
		DEBUG(0, ("Error getting subkeys for '%s': %s\n",
		      ldb_dn_get_linearized(ldap_path), ldb_errstring(c)));
		talloc_free(mem_ctx);
		return WERR_FOOBAR;
	}

	/* Search for values */
	ret = ldb_search(c, ldap_path, LDB_SCOPE_ONELEVEL,
			 "(value=*)", NULL, &res_vals);

	if (ret != LDB_SUCCESS) {
		DEBUG(0, ("Error getting values for '%s': %s\n",
		      ldb_dn_get_linearized(ldap_path), ldb_errstring(c)));
		talloc_free(mem_ctx);
		return WERR_FOOBAR;
	}

	/* Start an explicit transaction */
	ret = ldb_transaction_start(c);

	if (ret != LDB_SUCCESS) {
		DEBUG(0, ("ldb_transaction_start: %s\n", ldb_errstring(c)));
		talloc_free(mem_ctx);
		return WERR_FOOBAR;
	}

	if (res_keys->count || res_vals->count)
	{
		/* Delete any subkeys */
		for (i = 0; i < res_keys->count; i++)
		{
			werr = ldb_del_key(hk, ldb_msg_find_attr_as_string(
							res_keys->msgs[i],
							"key", NULL));
			if (!W_ERROR_IS_OK(werr)) {
				ret = ldb_transaction_cancel(c);
				talloc_free(mem_ctx);
				return werr;
			}
		}

		/* Delete any values */
		for (i = 0; i < res_vals->count; i++)
		{
			werr = ldb_del_value(hk, ldb_msg_find_attr_as_string(
							res_vals->msgs[i],
							"value", NULL));
			if (!W_ERROR_IS_OK(werr)) {
				ret = ldb_transaction_cancel(c);
				talloc_free(mem_ctx);
				return werr;
			}
		}
	}

	/* Delete the key itself */
	ret = ldb_delete(c, ldap_path);

	if (ret != LDB_SUCCESS)
	{
		DEBUG(1, ("ldb_del_key: %s\n", ldb_errstring(c)));
		ret = ldb_transaction_cancel(c);
		talloc_free(mem_ctx);
		return WERR_FOOBAR;
	}

	/* Commit the transaction */
	ret = ldb_transaction_commit(c);

	if (ret != LDB_SUCCESS)
	{
		DEBUG(0, ("ldb_transaction_commit: %s\n", ldb_errstring(c)));
		ret = ldb_transaction_cancel(c);
		talloc_free(mem_ctx);
		return WERR_FOOBAR;
	}

	talloc_free(mem_ctx);

	/* reset cache */
	talloc_free(parentkd->subkeys);
	parentkd->subkeys = NULL;

	return WERR_OK;
}

static WERROR ldb_set_value(struct hive_key *parent,
			    const char *name, uint32_t type,
			    const DATA_BLOB data)
{
	struct ldb_message *msg;
	struct ldb_key_data *kd = talloc_get_type(parent, struct ldb_key_data);
	int ret;
	TALLOC_CTX *mem_ctx = talloc_init("ldb_set_value");

	msg = reg_ldb_pack_value(kd->ldb, mem_ctx, name, type, data);

	msg->dn = ldb_dn_copy(msg, kd->dn);
	if (!ldb_dn_add_child_fmt(msg->dn, "value=%s",
				  reg_ldb_escape(mem_ctx, name)))
	{
		talloc_free(mem_ctx);
		return WERR_FOOBAR;
	}

	ret = ldb_add(kd->ldb, msg);
	if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
		int i;
		for (i = 0; i < msg->num_elements; i++) {
			msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
		}
		ret = ldb_modify(kd->ldb, msg);
	}

	if (ret != LDB_SUCCESS) {
		DEBUG(1, ("ldb_msg_add: %s\n", ldb_errstring(kd->ldb)));
		talloc_free(mem_ctx);
		return WERR_FOOBAR;
	}

	/* reset cache */
	talloc_free(kd->values);
	kd->values = NULL;

	talloc_free(mem_ctx);
	return WERR_OK;
}

static WERROR ldb_get_key_info(TALLOC_CTX *mem_ctx,
			       const struct hive_key *key,
			       const char **classname,
			       uint32_t *num_subkeys,
			       uint32_t *num_values,
			       NTTIME *last_change_time,
			       uint32_t *max_subkeynamelen,
			       uint32_t *max_valnamelen,
			       uint32_t *max_valbufsize)
{
	struct ldb_key_data *kd = talloc_get_type(key, struct ldb_key_data);

	if (kd->subkeys == NULL) {
		W_ERROR_NOT_OK_RETURN(cache_subkeys(kd));
	}

	if (kd->values == NULL) {
		W_ERROR_NOT_OK_RETURN(cache_values(kd));
	}

	/* FIXME */
	if (classname != NULL)
		*classname = NULL;

	if (num_subkeys != NULL) {
		*num_subkeys = kd->subkey_count;
	}

	if (num_values != NULL) {
		*num_values = kd->value_count;
	}

	if (last_change_time != NULL)
		*last_change_time = 0;

	if (max_subkeynamelen != NULL) {
		int i;
		struct ldb_message_element *el;

		*max_subkeynamelen = 0;

		for (i = 0; i < kd->subkey_count; i++) {
			el = ldb_msg_find_element(kd->subkeys[i], "key");
			*max_subkeynamelen = MAX(*max_subkeynamelen, el->values[0].length);
		}
	}

	if (max_valnamelen != NULL || max_valbufsize != NULL) {
		int i;
		struct ldb_message_element *el;
		W_ERROR_NOT_OK_RETURN(cache_values(kd));

		if (max_valbufsize != NULL)
			*max_valbufsize = 0;

		if (max_valnamelen != NULL)
			*max_valnamelen = 0;

		for (i = 0; i < kd->value_count; i++) {
			if (max_valnamelen != NULL) {
				el = ldb_msg_find_element(kd->values[i], "value");
				*max_valnamelen = MAX(*max_valnamelen, el->values[0].length);
			}

			if (max_valbufsize != NULL) {
				DATA_BLOB data;
				reg_ldb_unpack_value(mem_ctx, 
						     lp_iconv_convenience(global_loadparm),
						     kd->values[i], NULL, 
						     NULL, &data);
				*max_valbufsize = MAX(*max_valbufsize, data.length);
				talloc_free(data.data);
			}
		}
	}

	return WERR_OK;
}

static struct hive_operations reg_backend_ldb = {
	.name = "ldb",
	.add_key = ldb_add_key,
	.del_key = ldb_del_key,
	.get_key_by_name = ldb_open_key,
	.enum_value = ldb_get_value_by_id,
	.enum_key = ldb_get_subkey_by_id,
	.set_value = ldb_set_value,
	.get_value_by_name = ldb_get_value,
	.delete_value = ldb_del_value,
	.get_key_info = ldb_get_key_info,
};