diff options
Diffstat (limited to 'source4/lib/registry/ldb.c')
| -rw-r--r-- | source4/lib/registry/ldb.c | 726 |
1 files changed, 726 insertions, 0 deletions
diff --git a/source4/lib/registry/ldb.c b/source4/lib/registry/ldb.c new file mode 100644 index 0000000000..a8a9ed597e --- /dev/null +++ b/source4/lib/registry/ldb.c @@ -0,0 +1,726 @@ +/* + Unix SMB/CIFS implementation. + Registry interface + Copyright (C) Jelmer Vernooij 2004-2007. + + 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 "lib/ldb/include/ldb.h" +#include "lib/ldb/include/ldb_errors.h" +#include "ldb_wrap.h" +#include "librpc/gen_ndr/winreg.h" +#include "param/param.h" + +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; + int subkey_count, value_count; +}; + +static void reg_ldb_unpack_value(TALLOC_CTX *mem_ctx, + struct smb_iconv_convenience *iconv_convenience, + 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", + NULL)); + + value_type = ldb_msg_find_attr_as_uint(msg, "type", 0); + if (type != NULL) + *type = value_type; + val = ldb_msg_find_ldb_val(msg, "data"); + + switch (value_type) + { + case REG_SZ: + case REG_EXPAND_SZ: + data->length = convert_string_talloc(mem_ctx, iconv_convenience, CH_UTF8, CH_UTF16, + val->data, val->length, + (void **)&data->data); + break; + + case REG_DWORD: { + uint32_t tmp = strtoul((char *)val->data, NULL, 0); + *data = data_blob_talloc(mem_ctx, &tmp, 4); + } + break; + + default: + *data = data_blob_talloc(mem_ctx, val->data, val->length); + 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_val val; + struct ldb_message *msg = talloc_zero(mem_ctx, struct ldb_message); + char *type_s; + + ldb_msg_add_string(msg, "value", talloc_strdup(mem_ctx, name)); + + switch (type) { + case REG_SZ: + case REG_EXPAND_SZ: + val.length = convert_string_talloc(mem_ctx, lp_iconv_convenience(global_loadparm), CH_UTF16, CH_UNIX, + (void *)data.data, + data.length, + (void **)&val.data); + ldb_msg_add_value(msg, "data", &val, NULL); + break; + + case REG_DWORD: + ldb_msg_add_string(msg, "data", + talloc_asprintf(mem_ctx, "0x%x", + IVAL(data.data, 0))); + break; + default: + ldb_msg_add_value(msg, "data", &data, NULL); + } + + + type_s = talloc_asprintf(mem_ctx, "%u", type); + ldb_msg_add_string(msg, "type", type_s); + + 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) +{ + TALLOC_CTX *local_ctx; + struct ldb_dn *ret; + char *mypath = talloc_strdup(mem_ctx, path); + char *begin; + struct ldb_key_data *kd = talloc_get_type(from, struct ldb_key_data); + struct ldb_context *ldb = kd->ldb; + + local_ctx = talloc_new(mem_ctx); + + if (add) { + ret = ldb_dn_new(mem_ctx, ldb, add); + } else { + ret = ldb_dn_new(mem_ctx, ldb, NULL); + } + if (!ldb_dn_validate(ret)) { + talloc_free(ret); + talloc_free(local_ctx); + return NULL; + } + + while (mypath) { + char *keyname; + + begin = strrchr(mypath, '\\'); + + if (begin) keyname = begin + 1; + else keyname = mypath; + + if(strlen(keyname)) { + if (!ldb_dn_add_base_fmt(ret, "key=%s", + reg_ldb_escape(local_ctx, + keyname))) + { + talloc_free(local_ctx); + return NULL; + } + } + + if(begin) { + *begin = '\0'; + } else { + break; + } + } + + ldb_dn_add_base(ret, kd->dn); + + talloc_free(local_ctx); + + 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, kd->dn, LDB_SCOPE_ONELEVEL, "(key=*)", NULL, &res); + + 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, kd->dn, LDB_SCOPE_ONELEVEL, + "(value=*)", NULL, &res); + + 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_message_element *el; + struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data); + + /* 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; + + el = ldb_msg_find_element(kd->subkeys[idx], "key"); + SMB_ASSERT(el != NULL); + SMB_ASSERT(el->num_values != 0); + + if (name != NULL) + *name = talloc_strdup(mem_ctx, (char *)el->values[0].data); + + if (classname != NULL) + *classname = NULL; /* TODO: Store properly */ + + if (last_mod_time != NULL) + *last_mod_time = 0; /* TODO: we need to add this to the + ldb backend properly */ + + return WERR_OK; +} + +static WERROR ldb_get_value_by_id(TALLOC_CTX *mem_ctx, struct hive_key *k, + int idx, const char **name, + uint32_t *data_type, DATA_BLOB *data) +{ + struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data); + + /* 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, lp_iconv_convenience(global_loadparm), 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); + struct ldb_context *c = kd->ldb; + struct ldb_result *res; + int ret; + char *query = talloc_asprintf(mem_ctx, "(value=%s)", name); + + ret = ldb_search(c, kd->dn, LDB_SCOPE_ONELEVEL, query, NULL, &res); + + talloc_free(query); + + 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; + } + + if (res->count == 0) + return WERR_BADFILE; + + reg_ldb_unpack_value(mem_ctx, lp_iconv_convenience(global_loadparm), res->msgs[0], NULL, data_type, data); + + return WERR_OK; +} + +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 *ldap_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; + + ldap_path = reg_path_to_ldb(mem_ctx, h, name, NULL); + + ret = ldb_search(c, ldap_path, LDB_SCOPE_BASE, "(key=*)", NULL, &res); + + if (ret != LDB_SUCCESS) { + DEBUG(3, ("Error opening key '%s': %s\n", + ldb_dn_get_linearized(ldap_path), ldb_errstring(c))); + return WERR_FOOBAR; + } else if (res->count == 0) { + DEBUG(3, ("Key '%s' not found\n", + ldb_dn_get_linearized(ldap_path))); + talloc_free(res); + return WERR_BADFILE; + } + + newkd = talloc_zero(mem_ctx, struct ldb_key_data); + newkd->key.ops = ®_backend_ldb; + newkd->ldb = talloc_reference(newkd, kd->ldb); + newkd->dn = ldb_dn_copy(mem_ctx, res->msgs[0]->dn); + + *key = (struct hive_key *)newkd; + + talloc_free(res); + + 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 event_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_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 = ®_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 = ®_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, +}; 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