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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-05 17:47:29 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-05 17:47:29 +0000
commit4f5791ebd03eaec1c7da0865a383175b05102712 (patch)
tree8ce7b00f7a76baa386372422adebbe64510812d4 /source4/lib/registry/ldb.c
parentInitial commit. (diff)
downloadsamba-4f5791ebd03eaec1c7da0865a383175b05102712.tar.xz
samba-4f5791ebd03eaec1c7da0865a383175b05102712.zip
Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'source4/lib/registry/ldb.c')
-rw-r--r--source4/lib/registry/ldb.c1018
1 files changed, 1018 insertions, 0 deletions
diff --git a/source4/lib/registry/ldb.c b/source4/lib/registry/ldb.c
new file mode 100644
index 0000000..db383a5
--- /dev/null
+++ b/source4/lib/registry/ldb.c
@@ -0,0 +1,1018 @@
+/*
+ Unix SMB/CIFS implementation.
+ Registry interface
+ Copyright (C) 2004-2007, Jelmer Vernooij, jelmer@samba.org
+ Copyright (C) 2008-2010, Matthias Dieter Wallnöfer, mdw@samba.org
+
+ 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/>.
+*/
+
+#include "includes.h"
+#include "registry.h"
+#include <ldb.h>
+#include <ldb_errors.h>
+#include "ldb_wrap.h"
+#include "librpc/gen_ndr/winreg.h"
+#include "param/param.h"
+#include "lib/util/smb_strtox.h"
+
+#undef strcasecmp
+
+static struct hive_operations reg_backend_ldb;
+
+struct ldb_key_data
+{
+ struct hive_key key;
+ struct ldb_context *ldb;
+ struct ldb_dn *dn;
+ struct ldb_message **subkeys, **values;
+ unsigned int subkey_count, value_count;
+ const char *classname;
+};
+
+static void reg_ldb_unpack_value(TALLOC_CTX *mem_ctx,
+ struct ldb_message *msg,
+ const char **name, uint32_t *type,
+ DATA_BLOB *data)
+{
+ const struct ldb_val *val;
+ uint32_t value_type;
+
+ if (name != NULL) {
+ *name = talloc_strdup(mem_ctx,
+ ldb_msg_find_attr_as_string(msg, "value",
+ ""));
+ }
+
+ value_type = ldb_msg_find_attr_as_uint(msg, "type", 0);
+ *type = value_type;
+
+ val = ldb_msg_find_ldb_val(msg, "data");
+
+ switch (value_type)
+ {
+ case REG_SZ:
+ case REG_EXPAND_SZ:
+ if (val != NULL) {
+ /* The data should be provided as UTF16 string */
+ convert_string_talloc(mem_ctx, CH_UTF8, CH_UTF16,
+ val->data, val->length,
+ (void **)&data->data, &data->length);
+ } else {
+ data->data = NULL;
+ data->length = 0;
+ }
+ break;
+
+ case REG_DWORD:
+ case REG_DWORD_BIG_ENDIAN:
+ if (val != NULL) {
+ int error = 0;
+ /* The data is a plain DWORD */
+ uint32_t tmp;
+
+ tmp = smb_strtoul((char *)val->data,
+ NULL,
+ 0,
+ &error,
+ SMB_STR_STANDARD);
+ if (error != 0) {
+ data->data = NULL;
+ data->length = 0;
+ break;
+ }
+ data->data = talloc_size(mem_ctx, sizeof(uint32_t));
+ if (data->data != NULL) {
+ SIVAL(data->data, 0, tmp);
+ }
+ data->length = sizeof(uint32_t);
+ } else {
+ data->data = NULL;
+ data->length = 0;
+ }
+ break;
+
+ case REG_QWORD:
+ if (val != NULL) {
+ int error = 0;
+ /* The data is a plain QWORD */
+ uint64_t tmp;
+
+ tmp = smb_strtoull((char *)val->data,
+ NULL,
+ 0,
+ &error,
+ SMB_STR_STANDARD);
+ if (error != 0) {
+ data->data = NULL;
+ data->length = 0;
+ break;
+ }
+ data->data = talloc_size(mem_ctx, sizeof(uint64_t));
+ if (data->data != NULL) {
+ SBVAL(data->data, 0, tmp);
+ }
+ data->length = sizeof(uint64_t);
+ } else {
+ data->data = NULL;
+ data->length = 0;
+ }
+ break;
+
+ case REG_BINARY:
+ default:
+ if (val != NULL) {
+ data->data = talloc_memdup(mem_ctx, val->data,
+ val->length);
+ data->length = val->length;
+ } else {
+ data->data = NULL;
+ data->length = 0;
+ }
+ break;
+ }
+}
+
+static struct ldb_message *reg_ldb_pack_value(struct ldb_context *ctx,
+ TALLOC_CTX *mem_ctx,
+ const char *name,
+ uint32_t type, DATA_BLOB data)
+{
+ struct ldb_message *msg;
+ char *name_dup, *type_str;
+ int ret;
+
+ msg = ldb_msg_new(mem_ctx);
+ if (msg == NULL) {
+ return NULL;
+ }
+
+ name_dup = talloc_strdup(msg, name);
+ if (name_dup == NULL) {
+ talloc_free(msg);
+ return NULL;
+ }
+
+ ret = ldb_msg_add_string(msg, "value", name_dup);
+ if (ret != LDB_SUCCESS) {
+ talloc_free(msg);
+ return NULL;
+ }
+
+ switch (type) {
+ case REG_SZ:
+ case REG_EXPAND_SZ:
+ if ((data.length > 0) && (data.data != NULL)) {
+ struct ldb_val *val;
+ bool ret2 = false;
+
+ val = talloc_zero(msg, struct ldb_val);
+ if (val == NULL) {
+ talloc_free(msg);
+ return NULL;
+ }
+
+ /* The data is provided as UTF16 string */
+ ret2 = convert_string_talloc(mem_ctx, CH_UTF16, CH_UTF8,
+ (void *)data.data, data.length,
+ (void **)&val->data, &val->length);
+ if (ret2) {
+ ret = ldb_msg_add_value(msg, "data", val, NULL);
+ } else {
+ /* workaround for non-standard data */
+ ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
+ }
+ } else {
+ ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
+ }
+ break;
+
+ case REG_DWORD:
+ case REG_DWORD_BIG_ENDIAN:
+ if ((data.length > 0) && (data.data != NULL)) {
+ if (data.length == sizeof(uint32_t)) {
+ char *conv_str;
+
+ conv_str = talloc_asprintf(msg, "0x%8.8x",
+ IVAL(data.data, 0));
+ if (conv_str == NULL) {
+ talloc_free(msg);
+ return NULL;
+ }
+ ret = ldb_msg_add_string(msg, "data", conv_str);
+ } else {
+ /* workaround for non-standard data */
+ talloc_free(msg);
+ return NULL;
+ }
+ } else {
+ ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
+ }
+ break;
+
+ case REG_QWORD:
+ if ((data.length > 0) && (data.data != NULL)) {
+ if (data.length == sizeof(uint64_t)) {
+ char *conv_str;
+
+ conv_str = talloc_asprintf(msg, "0x%16.16llx",
+ (unsigned long long)BVAL(data.data, 0));
+ if (conv_str == NULL) {
+ talloc_free(msg);
+ return NULL;
+ }
+ ret = ldb_msg_add_string(msg, "data", conv_str);
+ } else {
+ /* workaround for non-standard data */
+ talloc_free(msg);
+ return NULL;
+
+ }
+ } else {
+ ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
+ }
+ break;
+
+ case REG_BINARY:
+ default:
+ if ((data.length > 0) && (data.data != NULL)) {
+ ret = ldb_msg_add_value(msg, "data", &data, NULL);
+ } else {
+ ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
+ }
+ break;
+ }
+
+ if (ret != LDB_SUCCESS) {
+ talloc_free(msg);
+ return NULL;
+ }
+
+ type_str = talloc_asprintf(mem_ctx, "%u", type);
+ if (type_str == NULL) {
+ talloc_free(msg);
+ return NULL;
+ }
+
+ ret = ldb_msg_add_string(msg, "type", type_str);
+ if (ret != LDB_SUCCESS) {
+ talloc_free(msg);
+ return NULL;
+ }
+
+ return msg;
+}
+
+static char *reg_ldb_escape(TALLOC_CTX *mem_ctx, const char *value)
+{
+ struct ldb_val val;
+
+ val.data = discard_const_p(uint8_t, value);
+ val.length = strlen(value);
+
+ return ldb_dn_escape_value(mem_ctx, val);
+}
+
+static int reg_close_ldb_key(struct ldb_key_data *key)
+{
+ if (key->subkeys != NULL) {
+ talloc_free(key->subkeys);
+ key->subkeys = NULL;
+ }
+
+ if (key->values != NULL) {
+ talloc_free(key->values);
+ key->values = NULL;
+ }
+ return 0;
+}
+
+static struct ldb_dn *reg_path_to_ldb(TALLOC_CTX *mem_ctx,
+ const struct hive_key *from,
+ const char *path, const char *add)
+{
+ struct ldb_dn *ret;
+ char *mypath;
+ char *begin;
+ struct ldb_key_data *kd = talloc_get_type(from, struct ldb_key_data);
+ struct ldb_context *ldb = kd->ldb;
+
+ mypath = talloc_strdup(mem_ctx, path);
+ if (mypath == NULL) {
+ return NULL;
+ }
+
+ ret = ldb_dn_new(mem_ctx, ldb, add);
+ if (!ldb_dn_validate(ret)) {
+ talloc_free(ret);
+ return NULL;
+ }
+
+ if (!ldb_dn_add_base(ret, kd->dn)) {
+ talloc_free(ret);
+ return NULL;
+ }
+
+ while (mypath[0] != '\0') {
+ begin = strchr(mypath, '\\');
+ if (begin != NULL) {
+ *begin = '\0';
+ }
+
+ if (!ldb_dn_add_child_fmt(ret, "key=%s",
+ reg_ldb_escape(mem_ctx, mypath))) {
+ talloc_free(ret);
+ return NULL;
+ }
+
+ if (begin != NULL) {
+ mypath = begin + 1;
+ } else {
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static WERROR cache_subkeys(struct ldb_key_data *kd)
+{
+ struct ldb_context *c = kd->ldb;
+ struct ldb_result *res;
+ int ret;
+
+ ret = ldb_search(c, c, &res, kd->dn, LDB_SCOPE_ONELEVEL,
+ NULL, "(key=*)");
+ if (ret != LDB_SUCCESS) {
+ DEBUG(0, ("Error getting subkeys for '%s': %s\n",
+ ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
+ return WERR_FOOBAR;
+ }
+
+ kd->subkey_count = res->count;
+ kd->subkeys = talloc_steal(kd, res->msgs);
+ talloc_free(res);
+
+ return WERR_OK;
+}
+
+static WERROR cache_values(struct ldb_key_data *kd)
+{
+ struct ldb_context *c = kd->ldb;
+ struct ldb_result *res;
+ int ret;
+
+ ret = ldb_search(c, c, &res, kd->dn, LDB_SCOPE_ONELEVEL,
+ NULL, "(value=*)");
+ if (ret != LDB_SUCCESS) {
+ DEBUG(0, ("Error getting values for '%s': %s\n",
+ ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
+ return WERR_FOOBAR;
+ }
+
+ kd->value_count = res->count;
+ kd->values = talloc_steal(kd, res->msgs);
+ talloc_free(res);
+
+ return WERR_OK;
+}
+
+
+static WERROR ldb_get_subkey_by_id(TALLOC_CTX *mem_ctx,
+ const struct hive_key *k, uint32_t idx,
+ const char **name,
+ const char **classname,
+ NTTIME *last_mod_time)
+{
+ struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
+
+ /* Initialization */
+ if (name != NULL)
+ *name = NULL;
+ if (classname != NULL)
+ *classname = NULL;
+ if (last_mod_time != NULL)
+ *last_mod_time = 0; /* TODO: we need to add this to the
+ ldb backend properly */
+
+ /* Do a search if necessary */
+ if (kd->subkeys == NULL) {
+ W_ERROR_NOT_OK_RETURN(cache_subkeys(kd));
+ }
+
+ if (idx >= kd->subkey_count)
+ return WERR_NO_MORE_ITEMS;
+
+ if (name != NULL)
+ *name = talloc_strdup(mem_ctx,
+ ldb_msg_find_attr_as_string(kd->subkeys[idx], "key", NULL));
+ if (classname != NULL)
+ *classname = talloc_strdup(mem_ctx,
+ ldb_msg_find_attr_as_string(kd->subkeys[idx], "classname", NULL));
+
+ return WERR_OK;
+}
+
+static WERROR ldb_get_default_value(TALLOC_CTX *mem_ctx,
+ const struct hive_key *k,
+ const char **name, uint32_t *data_type,
+ DATA_BLOB *data)
+{
+ struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
+ struct ldb_context *c = kd->ldb;
+ const char* attrs[] = { "data", "type", NULL };
+ struct ldb_result *res;
+ int ret;
+
+ ret = ldb_search(c, mem_ctx, &res, kd->dn, LDB_SCOPE_BASE, attrs,
+ NULL);
+
+ if (ret != LDB_SUCCESS) {
+ DEBUG(0, ("Error getting default value for '%s': %s\n",
+ ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
+ return WERR_FOOBAR;
+ }
+
+ if (res->count == 0 || res->msgs[0]->num_elements == 0) {
+ talloc_free(res);
+ return WERR_FILE_NOT_FOUND;
+ }
+
+ if ((data_type != NULL) && (data != NULL)) {
+ reg_ldb_unpack_value(mem_ctx, res->msgs[0], name, data_type,
+ data);
+ }
+
+ talloc_free(res);
+
+ return WERR_OK;
+}
+
+static WERROR ldb_get_value_by_id(TALLOC_CTX *mem_ctx, struct hive_key *k,
+ uint32_t idx, const char **name,
+ uint32_t *data_type, DATA_BLOB *data)
+{
+ struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
+
+ /* if the default value exists, give it back */
+ if (W_ERROR_IS_OK(ldb_get_default_value(mem_ctx, k, name, data_type,
+ data))) {
+ if (idx == 0)
+ return WERR_OK;
+ else
+ --idx;
+ }
+
+ /* Do the search if necessary */
+ if (kd->values == NULL) {
+ W_ERROR_NOT_OK_RETURN(cache_values(kd));
+ }
+
+ if (idx >= kd->value_count)
+ return WERR_NO_MORE_ITEMS;
+
+ reg_ldb_unpack_value(mem_ctx, kd->values[idx], name, data_type, data);
+
+ return WERR_OK;
+}
+
+static WERROR ldb_get_value(TALLOC_CTX *mem_ctx, struct hive_key *k,
+ const char *name, uint32_t *data_type,
+ DATA_BLOB *data)
+{
+ struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
+ const char *res_name;
+ uint32_t idx;
+
+ /* the default value was requested, give it back */
+ if (name[0] == '\0') {
+ return ldb_get_default_value(mem_ctx, k, NULL, data_type, data);
+ }
+
+ /* Do the search if necessary */
+ if (kd->values == NULL) {
+ W_ERROR_NOT_OK_RETURN(cache_values(kd));
+ }
+
+ for (idx = 0; idx < kd->value_count; idx++) {
+ res_name = ldb_msg_find_attr_as_string(kd->values[idx], "value",
+ "");
+ if (ldb_attr_cmp(name, res_name) == 0) {
+ reg_ldb_unpack_value(mem_ctx, kd->values[idx], NULL,
+ data_type, data);
+ return WERR_OK;
+ }
+ }
+
+ return WERR_FILE_NOT_FOUND;
+}
+
+static WERROR ldb_open_key(TALLOC_CTX *mem_ctx, const struct hive_key *h,
+ const char *name, struct hive_key **key)
+{
+ struct ldb_result *res;
+ struct ldb_dn *ldb_path;
+ int ret;
+ struct ldb_key_data *newkd;
+ struct ldb_key_data *kd = talloc_get_type(h, struct ldb_key_data);
+ struct ldb_context *c = kd->ldb;
+
+ ldb_path = reg_path_to_ldb(mem_ctx, h, name, NULL);
+ W_ERROR_HAVE_NO_MEMORY(ldb_path);
+
+ ret = ldb_search(c, mem_ctx, &res, ldb_path, LDB_SCOPE_BASE, NULL,
+ NULL);
+
+ if (ret != LDB_SUCCESS) {
+ DEBUG(3, ("Error opening key '%s': %s\n",
+ ldb_dn_get_linearized(ldb_path), ldb_errstring(c)));
+ return WERR_FOOBAR;
+ } else if (res->count == 0) {
+ DEBUG(3, ("Key '%s' not found\n",
+ ldb_dn_get_linearized(ldb_path)));
+ talloc_free(res);
+ return WERR_FILE_NOT_FOUND;
+ }
+
+ newkd = talloc_zero(mem_ctx, struct ldb_key_data);
+ W_ERROR_HAVE_NO_MEMORY(newkd);
+ newkd->key.ops = &reg_backend_ldb;
+ newkd->ldb = talloc_reference(newkd, kd->ldb);
+ newkd->dn = ldb_dn_copy(newkd, res->msgs[0]->dn);
+ newkd->classname = talloc_steal(newkd,
+ ldb_msg_find_attr_as_string(res->msgs[0], "classname", NULL));
+
+ talloc_free(res);
+
+ *key = (struct hive_key *)newkd;
+
+ return WERR_OK;
+}
+
+WERROR reg_open_ldb_file(TALLOC_CTX *parent_ctx, const char *location,
+ struct auth_session_info *session_info,
+ struct cli_credentials *credentials,
+ struct tevent_context *ev_ctx,
+ struct loadparm_context *lp_ctx,
+ struct hive_key **k)
+{
+ struct ldb_key_data *kd;
+ struct ldb_context *wrap;
+ struct ldb_message *attrs_msg;
+
+ if (location == NULL)
+ return WERR_INVALID_PARAMETER;
+
+ wrap = ldb_wrap_connect(parent_ctx, ev_ctx, lp_ctx,
+ location, session_info, credentials, 0);
+
+ 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_dn *ldb_path;
+ struct ldb_message *msg;
+ struct ldb_key_data *newkd;
+ int ret;
+
+ ldb_path = reg_path_to_ldb(mem_ctx, parent, name, NULL);
+ W_ERROR_HAVE_NO_MEMORY(ldb_path);
+
+ msg = ldb_msg_new(mem_ctx);
+ W_ERROR_HAVE_NO_MEMORY(msg);
+
+ msg->dn = ldb_path;
+
+ ldb_msg_add_string(msg, "key", name);
+ if (classname != NULL) {
+ ldb_msg_add_string(msg, "classname", classname);
+ }
+
+ ret = ldb_add(parentkd->ldb, msg);
+
+ talloc_free(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(ldb_path)));
+
+ newkd = talloc_zero(mem_ctx, struct ldb_key_data);
+ W_ERROR_HAVE_NO_MEMORY(newkd);
+ newkd->ldb = talloc_reference(newkd, parentkd->ldb);
+ newkd->key.ops = &reg_backend_ldb;
+ newkd->dn = talloc_steal(newkd, ldb_path);
+ newkd->classname = talloc_steal(newkd, classname);
+
+ *newkey = (struct hive_key *)newkd;
+
+ /* reset cache */
+ talloc_free(parentkd->subkeys);
+ parentkd->subkeys = NULL;
+
+ return WERR_OK;
+}
+
+static WERROR ldb_del_value(TALLOC_CTX *mem_ctx, struct hive_key *key,
+ const char *child)
+{
+ int ret;
+ struct ldb_key_data *kd = talloc_get_type(key, struct ldb_key_data);
+ struct ldb_message *msg;
+ struct ldb_dn *childdn;
+
+ if (child[0] == '\0') {
+ /* default value */
+ msg = ldb_msg_new(mem_ctx);
+ W_ERROR_HAVE_NO_MEMORY(msg);
+ msg->dn = ldb_dn_copy(msg, kd->dn);
+ W_ERROR_HAVE_NO_MEMORY(msg->dn);
+ ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
+ if (ret != LDB_SUCCESS) {
+ return WERR_FOOBAR;
+ }
+ ret = ldb_msg_add_empty(msg, "type", LDB_FLAG_MOD_DELETE,
+ NULL);
+ if (ret != LDB_SUCCESS) {
+ return WERR_FOOBAR;
+ }
+
+ ret = ldb_modify(kd->ldb, msg);
+
+ talloc_free(msg);
+
+ if (ret == LDB_ERR_NO_SUCH_ATTRIBUTE) {
+ return WERR_FILE_NOT_FOUND;
+ } else if (ret != LDB_SUCCESS) {
+ DEBUG(1, ("ldb_del_value: %s\n", ldb_errstring(kd->ldb)));
+ return WERR_FOOBAR;
+ }
+ } else {
+ /* normal value */
+ 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_FILE_NOT_FOUND;
+ } 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(TALLOC_CTX *mem_ctx, const struct hive_key *key,
+ const char *name)
+{
+ unsigned int i;
+ int ret;
+ struct ldb_key_data *parentkd = talloc_get_type(key, struct ldb_key_data);
+ struct ldb_dn *ldb_path;
+ 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)) {
+ return werr;
+ }
+
+ ldb_path = reg_path_to_ldb(mem_ctx, key, name, NULL);
+ W_ERROR_HAVE_NO_MEMORY(ldb_path);
+
+ /* Search for subkeys */
+ ret = ldb_search(c, mem_ctx, &res_keys, ldb_path, LDB_SCOPE_ONELEVEL,
+ NULL, "(key=*)");
+
+ if (ret != LDB_SUCCESS) {
+ DEBUG(0, ("Error getting subkeys for '%s': %s\n",
+ ldb_dn_get_linearized(ldb_path), ldb_errstring(c)));
+ return WERR_FOOBAR;
+ }
+
+ /* Search for values */
+ ret = ldb_search(c, mem_ctx, &res_vals, ldb_path, LDB_SCOPE_ONELEVEL,
+ NULL, "(value=*)");
+
+ if (ret != LDB_SUCCESS) {
+ DEBUG(0, ("Error getting values for '%s': %s\n",
+ ldb_dn_get_linearized(ldb_path), ldb_errstring(c)));
+ 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)));
+ 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(mem_ctx, hk,
+ ldb_msg_find_attr_as_string(
+ res_keys->msgs[i],
+ "key", NULL));
+ if (!W_ERROR_IS_OK(werr)) {
+ ret = ldb_transaction_cancel(c);
+ return werr;
+ }
+ }
+
+ /* Delete any values */
+ for (i = 0; i < res_vals->count; i++)
+ {
+ werr = ldb_del_value(mem_ctx, hk,
+ ldb_msg_find_attr_as_string(
+ res_vals->msgs[i],
+ "value", NULL));
+ if (!W_ERROR_IS_OK(werr)) {
+ ret = ldb_transaction_cancel(c);
+ return werr;
+ }
+ }
+ }
+ talloc_free(res_keys);
+ talloc_free(res_vals);
+
+ /* Delete the key itself */
+ ret = ldb_delete(c, ldb_path);
+
+ if (ret != LDB_SUCCESS)
+ {
+ DEBUG(1, ("ldb_del_key: %s\n", ldb_errstring(c)));
+ ret = ldb_transaction_cancel(c);
+ 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);
+ return WERR_FOOBAR;
+ }
+
+ /* 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);
+ unsigned int i;
+ int ret;
+ TALLOC_CTX *mem_ctx = talloc_init("ldb_set_value");
+
+ msg = reg_ldb_pack_value(kd->ldb, mem_ctx, name, type, data);
+ W_ERROR_HAVE_NO_MEMORY(msg);
+
+ msg->dn = ldb_dn_copy(msg, kd->dn);
+ W_ERROR_HAVE_NO_MEMORY(msg->dn);
+
+ if (name[0] != '\0') {
+ /* For a default value, we add/overwrite the attributes to/of the hive.
+ For a normal value, we create a new child. */
+ if (!ldb_dn_add_child_fmt(msg->dn, "value=%s",
+ reg_ldb_escape(mem_ctx, name)))
+ {
+ talloc_free(mem_ctx);
+ return WERR_FOOBAR;
+ }
+ }
+
+ /* Try first a "modify" and if this doesn't work do try an "add" */
+ for (i = 0; i < msg->num_elements; i++) {
+ if (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) != LDB_FLAG_MOD_DELETE) {
+ msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
+ }
+ }
+ ret = ldb_modify(kd->ldb, msg);
+ if (ret == LDB_ERR_NO_SUCH_OBJECT) {
+ i = 0;
+ while (i < msg->num_elements) {
+ if (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_DELETE) {
+ ldb_msg_remove_element(msg, &msg->elements[i]);
+ } else {
+ ++i;
+ }
+ }
+ ret = ldb_add(kd->ldb, msg);
+ }
+ if (ret == LDB_ERR_NO_SUCH_ATTRIBUTE) {
+ /* ignore this -> the value didn't exist and also now doesn't */
+ ret = LDB_SUCCESS;
+ }
+
+ talloc_free(msg);
+
+ if (ret != LDB_SUCCESS) {
+ DEBUG(1, ("ldb_set_value: %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);
+ uint32_t default_value_type = REG_NONE;
+ DATA_BLOB default_value = { NULL, 0 };
+ WERROR werr;
+
+ /* Initialization */
+ if (classname != NULL)
+ *classname = NULL;
+ if (num_subkeys != NULL)
+ *num_subkeys = 0;
+ if (num_values != NULL)
+ *num_values = 0;
+ if (last_change_time != NULL)
+ *last_change_time = 0;
+ if (max_subkeynamelen != NULL)
+ *max_subkeynamelen = 0;
+ if (max_valnamelen != NULL)
+ *max_valnamelen = 0;
+ if (max_valbufsize != NULL)
+ *max_valbufsize = 0;
+
+ /* We need this to get the default value (if it exists) for counting
+ * the values under the key and for finding out the longest value buffer
+ * size. If no default value exists the DATA_BLOB "default_value" will
+ * remain { NULL, 0 }. */
+ werr = ldb_get_default_value(mem_ctx, key, NULL, &default_value_type,
+ &default_value);
+ if ((!W_ERROR_IS_OK(werr)) && (!W_ERROR_EQUAL(werr, WERR_FILE_NOT_FOUND))) {
+ return werr;
+ }
+
+ if (kd->subkeys == NULL) {
+ W_ERROR_NOT_OK_RETURN(cache_subkeys(kd));
+ }
+ if (kd->values == NULL) {
+ W_ERROR_NOT_OK_RETURN(cache_values(kd));
+ }
+
+ if (classname != NULL) {
+ *classname = kd->classname;
+ }
+
+ if (num_subkeys != NULL) {
+ *num_subkeys = kd->subkey_count;
+ }
+ if (num_values != NULL) {
+ *num_values = kd->value_count;
+ /* also consider the default value if it exists */
+ if (default_value.data != NULL) {
+ ++(*num_values);
+ }
+ }
+
+
+ if (max_subkeynamelen != NULL) {
+ unsigned int i;
+ struct ldb_message_element *el;
+
+ 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) {
+ unsigned int i;
+ struct ldb_message_element *el;
+ W_ERROR_NOT_OK_RETURN(cache_values(kd));
+
+ /* also consider the default value if it exists */
+ if ((max_valbufsize != NULL) && (default_value.data != NULL)) {
+ *max_valbufsize = MAX(*max_valbufsize,
+ default_value.length);
+ }
+
+ 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) {
+ uint32_t data_type;
+ DATA_BLOB data;
+ reg_ldb_unpack_value(mem_ctx,
+ kd->values[i], NULL,
+ &data_type, &data);
+ *max_valbufsize = MAX(*max_valbufsize, data.length);
+ talloc_free(data.data);
+ }
+ }
+ }
+
+ talloc_free(default_value.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,
+};