diff options
Diffstat (limited to 'source4/lib/registry/ldb.c')
| -rw-r--r-- | source4/lib/registry/ldb.c | 1018 |
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 = ®_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 = ®_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 = ®_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, +}; |