diff options
| -rw-r--r-- | source3/Makefile.in | 2 | ||||
| -rw-r--r-- | source3/groupdb/mapping.c | 20 | ||||
| -rw-r--r-- | source3/groupdb/mapping_ldb.c | 701 | ||||
| -rw-r--r-- | source3/groupdb/mapping_tdb.c | 279 |
4 files changed, 269 insertions, 733 deletions
diff --git a/source3/Makefile.in b/source3/Makefile.in index 323da3c91c..325984ceda 100644 --- a/source3/Makefile.in +++ b/source3/Makefile.in @@ -680,7 +680,7 @@ CP850_OBJ = modules/CP850.o CP437_OBJ = modules/CP437.o CHARSET_MACOSXFS_OBJ = modules/charset_macosxfs.o -GROUPDB_OBJ = groupdb/mapping.o groupdb/mapping_tdb.o groupdb/mapping_ldb.o +GROUPDB_OBJ = groupdb/mapping.o groupdb/mapping_tdb.o PROFILE_OBJ = profile/profile.o PROFILES_OBJ = utils/profiles.o \ diff --git a/source3/groupdb/mapping.c b/source3/groupdb/mapping.c index 579486b874..b648c58202 100644 --- a/source3/groupdb/mapping.c +++ b/source3/groupdb/mapping.c @@ -30,30 +30,12 @@ static const struct mapping_backend *backend; */ static bool init_group_mapping(void) { - const char *backend_string; - if (backend != NULL) { /* already initialised */ return True; } - /* - * default to using the ldb backend. This parameter should - * disappear in future versions of Samba3. - * - * But it's needed for cluster setups, because it's - * not yet possible to distribute a ldb inside a cluster. - */ - backend_string = lp_parm_const_string(-1, "groupdb", "backend", "ldb"); - - if (strcmp(backend_string, "ldb") == 0) { - backend = groupdb_ldb_init(); - } else if (strcmp(backend_string, "tdb") == 0) { - backend = groupdb_tdb_init(); - } else { - DEBUG(0,("Unknown groupdb backend '%s'\n", backend_string)); - smb_panic("Unknown groupdb backend"); - } + backend = groupdb_tdb_init(); return backend != NULL; } diff --git a/source3/groupdb/mapping_ldb.c b/source3/groupdb/mapping_ldb.c deleted file mode 100644 index 89966e1986..0000000000 --- a/source3/groupdb/mapping_ldb.c +++ /dev/null @@ -1,701 +0,0 @@ -/* - * Unix SMB/CIFS implementation. - * - * group mapping code on top of ldb - * - * Copyright (C) Andrew Tridgell 2006 - * - * based on tdb group mapping code from groupdb/mapping.c - * - * 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 "groupdb/mapping.h" -#include "lib/ldb/include/ldb.h" -#include "lib/ldb/include/ldb_errors.h" - -static struct ldb_context *ldb; - -static bool mapping_upgrade(const char *tdb_path); - -/* - connect to the group mapping ldb -*/ -static bool init_group_mapping(void) -{ - bool existed; - const char *init_ldif[] = - { "dn: @ATTRIBUTES\n" \ - "ntName: CASE_INSENSITIVE\n" \ - "\n", - "dn: @INDEXLIST\n" \ - "@IDXATTR: gidNumber\n" \ - "@IDXATTR: ntName\n" \ - "@IDXATTR: member\n" }; - const char *db_path, *tdb_path; - int ret; - int flags = 0; - - if (ldb != NULL) { - return True; - } - - /* this is needed as Samba3 doesn't have this globally yet */ - ldb_global_init(); - - db_path = state_path("group_mapping.ldb"); - - ldb = ldb_init(NULL, NULL); - if (ldb == NULL) goto failed; - - /* Ensure this db is created read/write for root only. */ - ldb_set_create_perms(ldb, 0600); - - existed = file_exist(db_path); - - if (lp_parm_bool(-1, "groupmap", "nosync", False)) { - flags |= LDB_FLG_NOSYNC; - } - - if (!lp_use_mmap()) { - flags |= LDB_FLG_NOMMAP; - } - - ret = ldb_connect(ldb, db_path, flags, NULL); - if (ret != LDB_SUCCESS) { - goto failed; - } - - /* force the permissions on the ldb to 0600 - this will fix - existing databases as well as new ones */ - if (chmod(db_path, 0600) != 0) { - goto failed; - } - - if (!existed) { - /* initialise the ldb with an index */ - struct ldb_ldif *ldif; - int i; - for (i=0;i<ARRAY_SIZE(init_ldif);i++) { - ldif = ldb_ldif_read_string(ldb, &init_ldif[i]); - if (ldif == NULL) goto failed; - ret = ldb_add(ldb, ldif->msg); - talloc_free(ldif); - if (ret == -1) goto failed; - } - } - - /* possibly upgrade */ - tdb_path = state_path("group_mapping.tdb"); - if (file_exist(tdb_path) && !mapping_upgrade(tdb_path)) { - unlink(state_path("group_mapping.ldb")); - goto failed; - } - - return True; - -failed: - DEBUG(0,("Failed to open group mapping ldb '%s' - '%s'\n", - db_path, ldb?ldb_errstring(ldb):strerror(errno))); - talloc_free(ldb); - ldb = NULL; - return False; -} - - -/* - form the DN for a mapping entry from a SID - */ -static struct ldb_dn *mapping_dn(TALLOC_CTX *mem_ctx, const DOM_SID *sid) -{ - fstring string_sid; - uint32_t rid; - DOM_SID domsid; - - sid_copy(&domsid, sid); - if (!sid_split_rid(&domsid, &rid)) { - return NULL; - } - if (!sid_to_fstring(string_sid, &domsid)) { - return NULL; - } - /* we split by domain and rid so we can do a subtree search - when we only want one domain */ - return ldb_dn_new_fmt(mem_ctx, ldb, "rid=%u,domain=%s", - rid, string_sid); -} - -/* - add a group mapping entry - */ -static bool add_mapping_entry(GROUP_MAP *map, int flag) -{ - struct ldb_message *msg; - int ret, i; - fstring string_sid; - - msg = ldb_msg_new(ldb); - if (msg == NULL) { - return False; - } - - msg->dn = mapping_dn(msg, &map->sid); - if (msg->dn == NULL) { - goto failed; - } - - if (ldb_msg_add_string(msg, "objectClass", "groupMap") != LDB_SUCCESS || - ldb_msg_add_string(msg, "sid", - sid_to_fstring(string_sid, &map->sid)) != LDB_SUCCESS || - ldb_msg_add_fmt(msg, "gidNumber", "%u", (unsigned)map->gid) != LDB_SUCCESS || - ldb_msg_add_fmt(msg, "sidNameUse", "%u", (unsigned)map->sid_name_use) != LDB_SUCCESS || - ldb_msg_add_string(msg, "comment", map->comment) != LDB_SUCCESS || - ldb_msg_add_string(msg, "ntName", map->nt_name) != LDB_SUCCESS) { - goto failed; - } - - ret = ldb_add(ldb, msg); - - /* if it exists we update it. This is a hangover from the semantics the - tdb backend had */ - if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) { - for (i=0;i<msg->num_elements;i++) { - msg->elements[i].flags = LDB_FLAG_MOD_REPLACE; - } - ret = ldb_modify(ldb, msg); - } - - talloc_free(msg); - - return ret == LDB_SUCCESS; - -failed: - talloc_free(msg); - return False; -} - -/* - unpack a ldb message into a GROUP_MAP structure -*/ -static bool msg_to_group_map(struct ldb_message *msg, GROUP_MAP *map) -{ - const char *sidstr; - - map->gid = ldb_msg_find_attr_as_int(msg, "gidNumber", -1); - map->sid_name_use = ldb_msg_find_attr_as_int(msg, "sidNameUse", -1); - fstrcpy(map->nt_name, ldb_msg_find_attr_as_string(msg, "ntName", NULL)); - fstrcpy(map->comment, ldb_msg_find_attr_as_string(msg, "comment", NULL)); - sidstr = ldb_msg_find_attr_as_string(msg, "sid", NULL); - - if (!string_to_sid(&map->sid, sidstr) || - map->gid == (gid_t)-1 || - map->sid_name_use == (enum lsa_SidType)-1) { - DEBUG(0,("Unable to unpack group mapping\n")); - return False; - } - - return True; -} - -/* - return a group map entry for a given sid -*/ -static bool get_group_map_from_sid(DOM_SID sid, GROUP_MAP *map) -{ - int ret; - struct ldb_dn *dn; - struct ldb_result *res=NULL; - bool result = false; - - dn = mapping_dn(talloc_tos(), &sid); - if (dn == NULL) { - goto failed; - } - - ret = ldb_search(ldb, dn, &res, dn, LDB_SCOPE_BASE, NULL, NULL); - if (ret != LDB_SUCCESS || res->count != 1) { - goto failed; - } - - if (!msg_to_group_map(res->msgs[0], map)) { - goto failed; - } - - result = true; - failed: - talloc_free(dn); - return result; -} - -/* - return a group map entry for a given gid -*/ -static bool get_group_map_from_gid(gid_t gid, GROUP_MAP *map) -{ - int ret; - struct ldb_result *res=NULL; - bool result = false; - - ret = ldb_search(ldb, talloc_tos(), &res, NULL, LDB_SCOPE_SUBTREE, - NULL, "(&(gidNumber=%u)(objectClass=groupMap))", - (unsigned)gid); - if (ret != LDB_SUCCESS || res->count != 1) { - goto failed; - } - - if (!msg_to_group_map(res->msgs[0], map)) { - goto failed; - } - - result = true; -failed: - TALLOC_FREE(res); - return result; -} - -/* - Return the sid and the type of the unix group. -*/ -static bool get_group_map_from_ntname(const char *name, GROUP_MAP *map) -{ - int ret; - struct ldb_result *res=NULL; - bool result = false; - - ret = ldb_search(ldb, talloc_tos(), &res, NULL, LDB_SCOPE_SUBTREE, - NULL, "(&(ntName=%s)(objectClass=groupMap))", name); - if (ret != LDB_SUCCESS || res->count != 1) { - goto failed; - } - - if (!msg_to_group_map(res->msgs[0], map)) { - goto failed; - } - - result = true; - failed: - TALLOC_FREE(res); - return result; -} - -/* - Remove a group mapping entry. -*/ -static bool group_map_remove(const DOM_SID *sid) -{ - struct ldb_dn *dn; - int ret; - - dn = mapping_dn(ldb, sid); - if (dn == NULL) { - return False; - } - ret = ldb_delete(ldb, dn); - talloc_free(dn); - - return ret == LDB_SUCCESS; -} - - -/* - Enumerate the group mappings for a domain -*/ -static bool enum_group_mapping(const DOM_SID *domsid, enum lsa_SidType sid_name_use, - GROUP_MAP **pp_rmap, - size_t *p_num_entries, bool unix_only) -{ - int i, ret; - fstring name; - struct ldb_result *res = NULL; - struct ldb_dn *basedn=NULL; - TALLOC_CTX *tmp_ctx; - - tmp_ctx = talloc_new(ldb); - if (tmp_ctx == NULL) goto failed; - - /* we do a subtree search on the domain */ - if (domsid != NULL) { - sid_to_fstring(name, domsid); - basedn = ldb_dn_new_fmt(tmp_ctx, ldb, "domain=%s", name); - if (basedn == NULL) goto failed; - } - - if (sid_name_use == SID_NAME_UNKNOWN) { - ret = ldb_search(ldb, tmp_ctx, &res, basedn, LDB_SCOPE_SUBTREE, - NULL, "(&(objectClass=groupMap))"); - } else { - ret = ldb_search(ldb, tmp_ctx, &res, basedn, LDB_SCOPE_SUBTREE, - NULL, "(&(sidNameUse=%u)(objectClass=groupMap))", - sid_name_use); - } - - if (ret != LDB_SUCCESS) goto failed; - - (*pp_rmap) = NULL; - *p_num_entries = 0; - - for (i=0;i<res->count;i++) { - (*pp_rmap) = SMB_REALLOC_ARRAY((*pp_rmap), GROUP_MAP, - (*p_num_entries)+1); - if (!(*pp_rmap)) goto failed; - - if (!msg_to_group_map(res->msgs[i], &(*pp_rmap)[*p_num_entries])) { - goto failed; - } - - (*p_num_entries)++; - } - - talloc_free(tmp_ctx); - return True; - -failed: - talloc_free(tmp_ctx); - return False; -} - -/* - This operation happens on session setup, so it should better be fast. We - store a list of aliases a SID is member of hanging off MEMBEROF/SID. -*/ -static NTSTATUS one_alias_membership(const DOM_SID *member, - DOM_SID **sids, size_t *num) -{ - const char *attrs[] = { - "sid", - NULL - }; - DOM_SID alias; - int ret, i; - struct ldb_result *res=NULL; - fstring string_sid; - NTSTATUS status; - - if (!sid_to_fstring(string_sid, member)) { - return NT_STATUS_INVALID_PARAMETER; - } - - ret = ldb_search(ldb, talloc_tos(), &res, NULL, LDB_SCOPE_SUBTREE, - attrs, "(&(member=%s)(objectClass=groupMap))", - string_sid); - if (ret != LDB_SUCCESS) { - status = NT_STATUS_INTERNAL_DB_CORRUPTION; - goto failed; - } - - for (i=0;i<res->count;i++) { - struct ldb_message_element *el; - el = ldb_msg_find_element(res->msgs[i], "sid"); - if (el == NULL || el->num_values != 1) { - status = NT_STATUS_INTERNAL_DB_CORRUPTION; - goto failed; - } - string_to_sid(&alias, (char *)el->values[0].data); - status = add_sid_to_array_unique(NULL, &alias, sids, num); - if (!NT_STATUS_IS_OK(status)) { - goto failed; - } - } - - status = NT_STATUS_OK; - failed: - TALLOC_FREE(res); - return status; -} - -/* - add/remove a member field -*/ -static NTSTATUS modify_aliasmem(const DOM_SID *alias, const DOM_SID *member, - int operation) -{ - fstring string_sid; - int ret; - struct ldb_message msg; - struct ldb_message_element el; - struct ldb_val val; - TALLOC_CTX *tmp_ctx; - GROUP_MAP map; - - if (!get_group_map_from_sid(*alias, &map)) { - sid_to_fstring(string_sid, alias); - return NT_STATUS_NO_SUCH_ALIAS; - } - - if ((map.sid_name_use != SID_NAME_ALIAS) && - (map.sid_name_use != SID_NAME_WKN_GRP)) { - DEBUG(0,("sid_name_use=%d\n", map.sid_name_use)); - return NT_STATUS_NO_SUCH_ALIAS; - } - - tmp_ctx = talloc_new(NULL); - if (tmp_ctx == NULL) { - return NT_STATUS_NO_MEMORY; - } - - msg.dn = mapping_dn(tmp_ctx, alias); - if (msg.dn == NULL) { - return NT_STATUS_NO_MEMORY; - } - msg.num_elements = 1; - msg.elements = ⪙ - el.flags = operation; - el.name = talloc_strdup(tmp_ctx, "member"); - el.num_values = 1; - el.values = &val; - sid_to_fstring(string_sid, member); - val.data = (uint8_t *)string_sid; - val.length = strlen(string_sid); - - ret = ldb_modify(ldb, &msg); - talloc_free(tmp_ctx); - - if (ret == LDB_ERR_NO_SUCH_OBJECT) { - return NT_STATUS_NO_SUCH_ALIAS; - } - - if (operation == LDB_FLAG_MOD_ADD && - ret == LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS) { - return NT_STATUS_MEMBER_IN_ALIAS; - } - - return (ret == LDB_SUCCESS ? NT_STATUS_OK : NT_STATUS_ACCESS_DENIED); -} - -static NTSTATUS add_aliasmem(const DOM_SID *alias, const DOM_SID *member) -{ - return modify_aliasmem(alias, member, LDB_FLAG_MOD_ADD); -} - -static NTSTATUS del_aliasmem(const DOM_SID *alias, const DOM_SID *member) -{ - return modify_aliasmem(alias, member, LDB_FLAG_MOD_DELETE); -} - - -/* - enumerate sids that have the given alias set in member -*/ -static NTSTATUS enum_aliasmem(const DOM_SID *alias, TALLOC_CTX *mem_ctx, - DOM_SID **sids, size_t *num) -{ - const char *attrs[] = { - "member", - NULL - }; - int ret, i; - NTSTATUS status = NT_STATUS_OK; - struct ldb_result *res=NULL; - struct ldb_dn *dn; - struct ldb_message_element *el; - - *sids = NULL; - *num = 0; - - dn = mapping_dn(ldb, alias); - if (dn == NULL) { - return NT_STATUS_NO_MEMORY; - } - - ret = ldb_search(ldb, ldb, &res, dn, LDB_SCOPE_BASE, attrs, NULL); - if (ret == LDB_SUCCESS && res->count == 0) { - talloc_free(res); - talloc_free(dn); - return NT_STATUS_OK; - } - if (ret != LDB_SUCCESS) { - talloc_free(dn); - return NT_STATUS_INTERNAL_DB_CORRUPTION; - } - - talloc_steal(dn, res); - el = ldb_msg_find_element(res->msgs[0], "member"); - if (el == NULL) { - talloc_free(dn); - return NT_STATUS_OK; - } - - for (i=0;i<el->num_values;i++) { - DOM_SID sid; - string_to_sid(&sid, (const char *)el->values[i].data); - status = add_sid_to_array_unique(mem_ctx, &sid, sids, num); - if (!NT_STATUS_IS_OK(status)) { - goto done; - } - } - -done: - talloc_free(dn); - return status; -} - -/* - upgrade one group mapping record from the old tdb format -*/ -static int upgrade_map_record(TDB_CONTEXT *tdb_ctx, TDB_DATA key, - TDB_DATA data, void *state) -{ - int ret; - GROUP_MAP map; - - if (strncmp((char *)key.dptr, GROUP_PREFIX, - MIN(key.dsize, strlen(GROUP_PREFIX))) != 0) { - return 0; - } - - if (!string_to_sid(&map.sid, strlen(GROUP_PREFIX) + (const char *)key.dptr)) { - DEBUG(0,("Bad sid key '%s' during upgrade\n", (const char *)key.dptr)); - *(int *)state = -1; - return -1; - } - - ret = tdb_unpack(data.dptr, data.dsize, "ddff", - &map.gid, &map.sid_name_use, &map.nt_name, &map.comment); - if (ret == -1) { - DEBUG(0,("Failed to unpack group map record during upgrade\n")); - *(int *)state = -1; - return -1; - } - - if ((int)map.gid == -1) { - /* - * Ignore old invalid mappings - */ - return 0; - } - - if (!add_mapping_entry(&map, 0)) { - DEBUG(0,("Failed to add mapping entry during upgrade\n")); - *(int *)state = -1; - return -1; - } - - return 0; -} - -/* - upgrade one alias record from the old tdb format -*/ -static int upgrade_alias_record(TDB_CONTEXT *tdb_ctx, TDB_DATA key, - TDB_DATA data, void *state) -{ - const char *p = (const char *)data.dptr; - char *string_sid; - DOM_SID member; - TALLOC_CTX *frame; - - if (strncmp((char *)key.dptr, MEMBEROF_PREFIX, - MIN(key.dsize, strlen(MEMBEROF_PREFIX))) != 0) { - return 0; - } - - if (!string_to_sid(&member, strlen(MEMBEROF_PREFIX) + (const char *)key.dptr)) { - DEBUG(0,("Bad alias key %s during upgrade\n", - (const char *)key.dptr)); - *(int *)state = -1; - } - - frame = talloc_stackframe(); - while (next_token_talloc(frame,&p, &string_sid, " ")) { - DOM_SID alias; - NTSTATUS status; - string_to_sid(&alias, string_sid); - status = add_aliasmem(&alias, &member); - if (NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_ALIAS)) { - DEBUG(0,("Ignoring orphaned alias record '%s'\n", - string_sid)); - } else if (!NT_STATUS_IS_OK(status)) { - DEBUG(0,("Failed to add alias member during upgrade - %s\n", - nt_errstr(status))); - *(int *)state = -1; - TALLOC_FREE(frame); - return -1; - } - } - TALLOC_FREE(frame); - return 0; -} - -/* - upgrade from a old style tdb -*/ -static bool mapping_upgrade(const char *tdb_path) -{ - static TDB_CONTEXT *tdb; - int ret, status=0; - - tdb = tdb_open_log(tdb_path, 0, TDB_DEFAULT, O_RDWR, 0600); - if (tdb == NULL) goto failed; - - /* we have to do the map records first, as alias records may - reference them */ - ret = tdb_traverse(tdb, upgrade_map_record, &status); - if (ret == -1 || status == -1) goto failed; - - ret = tdb_traverse(tdb, upgrade_alias_record, &status); - if (ret == -1 || status == -1) goto failed; - - if (tdb) { - tdb_close(tdb); - tdb = NULL; - } - - { - const char *old_path = tdb_path; - char *new_path = state_path("group_mapping.tdb.upgraded"); - - if (!new_path) { - goto failed; - } - if (rename(old_path, new_path) != 0) { - DEBUG(0,("Failed to rename old group mapping database\n")); - goto failed; - } - } - return True; - -failed: - DEBUG(0,("Failed to upgrade group mapping database\n")); - if (tdb) tdb_close(tdb); - return False; -} - - - -static const struct mapping_backend ldb_backend = { - .add_mapping_entry = add_mapping_entry, - .get_group_map_from_sid = get_group_map_from_sid, - .get_group_map_from_gid = get_group_map_from_gid, - .get_group_map_from_ntname = get_group_map_from_ntname, - .group_map_remove = group_map_remove, - .enum_group_mapping = enum_group_mapping, - .one_alias_membership = one_alias_membership, - .add_aliasmem = add_aliasmem, - .del_aliasmem = del_aliasmem, - .enum_aliasmem = enum_aliasmem -}; - -/* - initialise the ldb mapping backend - */ -const struct mapping_backend *groupdb_ldb_init(void) -{ - if (!init_group_mapping()) { - DEBUG(0,("Failed to initialise ldb mapping backend\n")); - return NULL; - } - - return &ldb_backend; -} diff --git a/source3/groupdb/mapping_tdb.c b/source3/groupdb/mapping_tdb.c index 8498f0c821..06d35fe7c2 100644 --- a/source3/groupdb/mapping_tdb.c +++ b/source3/groupdb/mapping_tdb.c @@ -25,15 +25,22 @@ static struct db_context *db; /* used for driver files */ -static bool enum_group_mapping(const DOM_SID *domsid, enum lsa_SidType sid_name_use, GROUP_MAP **pp_rmap, - size_t *p_num_entries, bool unix_only); +static bool enum_group_mapping(const DOM_SID *domsid, + enum lsa_SidType sid_name_use, + GROUP_MAP **pp_rmap, + size_t *p_num_entries, + bool unix_only); static bool group_map_remove(const DOM_SID *sid); - + +static bool mapping_switch(const char *ldb_path); + /**************************************************************************** Open the group mapping tdb. ****************************************************************************/ static bool init_group_mapping(void) { + const char *ldb_path; + if (db != NULL) { return true; } @@ -46,13 +53,14 @@ static bool init_group_mapping(void) return false; } -#if 0 - /* - * This code was designed to handle a group mapping version - * upgrade. mapping_tdb is not active by default anymore, so ignore - * this here. - */ - { + ldb_path = state_path("group_mapping.ldb"); + if (file_exist(ldb_path) && !mapping_switch(ldb_path)) { + unlink(state_path("group_mapping.tdb")); + return false; + + } else { + /* handle upgrade from old versions of the database */ +#if 0 /* -- Needs conversion to dbwrap -- */ const char *vstring = "INFO/version"; int32 vers_id; GROUP_MAP *map_table = NULL; @@ -96,9 +104,8 @@ static bool init_group_mapping(void) SAFE_FREE( map_table ); } - } #endif - + } return true; } @@ -719,6 +726,254 @@ static NTSTATUS del_aliasmem(const DOM_SID *alias, const DOM_SID *member) return status; } + +/* -- ldb->tdb switching code -------------------------------------------- */ + +/* change this if the data format ever changes */ +#define LTDB_PACKING_FORMAT 0x26011967 + +/* old packing formats (not supported for now, + * it was never used for group mapping AFAIK) */ +#define LTDB_PACKING_FORMAT_NODN 0x26011966 + +static unsigned int pull_uint32(uint8_t *p, int ofs) +{ + p += ofs; + return p[0] | (p[1]<<8) | (p[2]<<16) | (p[3]<<24); +} + +/* + unpack a ldb message from a linear buffer in TDB_DATA +*/ +static int convert_ldb_record(TDB_CONTEXT *ltdb, TDB_DATA key, + TDB_DATA data, void *ptr) +{ + TALLOC_CTX *tmp_ctx = talloc_tos(); + GROUP_MAP map; + uint8_t *p; + uint32_t format; + uint32_t num_el; + unsigned int remaining; + unsigned int i, j; + size_t len; + char *name; + char *val; + char *q; + uint32_t num_mem = 0; + DOM_SID *members; + + p = (uint8_t *)data.dptr; + if (data.dsize < 8) { + errno = EIO; + goto failed; + } + + format = pull_uint32(p, 0); + num_el = pull_uint32(p, 4); + p += 8; + + remaining = data.dsize - 8; + + switch (format) { + case LTDB_PACKING_FORMAT: + len = strnlen((char *)p, remaining); + if (len == remaining) { + errno = EIO; + goto failed; + } + + if (*p == '@') { + /* ignore special LDB attributes */ + return 0; + } + + if (strncmp((char *)p, "rid=", 4)) { + /* unknown entry, ignore */ + DEBUG(3, ("Found unknown entry in group mapping " + "database named [%s]\n", (char *)p)); + return 0; + } + + remaining -= len + 1; + p += len + 1; + break; + + case LTDB_PACKING_FORMAT_NODN: + default: + errno = EIO; + goto failed; + } + + if (num_el == 0) { + /* bad entry, ignore */ + return 0; + } + + if (num_el > remaining / 6) { + errno = EIO; + goto failed; + } + + ZERO_STRUCT(map); + + for (i = 0; i < num_el; i++) { + uint32_t num_vals; + + if (remaining < 10) { + errno = EIO; + goto failed; + } + len = strnlen((char *)p, remaining - 6); + if (len == remaining - 6) { + errno = EIO; + goto failed; + } + name = talloc_strndup(tmp_ctx, (char *)p, len); + if (name == NULL) { + errno = ENOMEM; + goto failed; + } + remaining -= len + 1; + p += len + 1; + + num_vals = pull_uint32(p, 0); + if (StrCaseCmp(name, "member") == 0) { + num_mem = num_vals; + members = talloc_array(tmp_ctx, DOM_SID, num_mem); + if (members == NULL) { + errno = ENOMEM; + goto failed; + } + } else if (num_vals != 1) { + errno = EIO; + goto failed; + } + + p += 4; + remaining -= 4; + + for (j = 0; j < num_vals; j++) { + len = pull_uint32(p, 0); + if (len > remaining-5) { + errno = EIO; + goto failed; + } + + val = talloc_strndup(tmp_ctx, (char *)(p + 4), len); + if (val == NULL) { + errno = ENOMEM; + goto failed; + } + + remaining -= len+4+1; + p += len+4+1; + + /* we ignore unknown or uninteresting attributes + * (objectclass, etc.) */ + if (StrCaseCmp(name, "gidNumber") == 0) { + map.gid = strtoul(val, &q, 10); + if (*q) { + errno = EIO; + goto failed; + } + } else if (StrCaseCmp(name, "sid") == 0) { + if (!string_to_sid(&map.sid, val)) { + errno = EIO; + goto failed; + } + } else if (StrCaseCmp(name, "sidNameUse") == 0) { + map.sid_name_use = strtoul(val, &q, 10); + if (*q) { + errno = EIO; + goto failed; + } + } else if (StrCaseCmp(name, "ntname") == 0) { + strlcpy(map.nt_name, val, + sizeof(map.nt_name) -1); + } else if (StrCaseCmp(name, "comment") == 0) { + strlcpy(map.comment, val, + sizeof(map.comment) -1); + } else if (StrCaseCmp(name, "member") == 0) { + if (!string_to_sid(&members[j], val)) { + errno = EIO; + goto failed; + } + } + + TALLOC_FREE(val); + } + + TALLOC_FREE(name); + } + + if (!add_mapping_entry(&map, 0)) { + errno = EIO; + goto failed; + } + + if (num_mem) { + for (j = 0; j < num_mem; j++) { + NTSTATUS status; + status = add_aliasmem(&map.sid, &members[j]); + if (!NT_STATUS_IS_OK(status)) { + errno = EIO; + goto failed; + } + } + } + + if (remaining != 0) { + DEBUG(0, ("Errror: %d bytes unread in ltdb_unpack_data\n", + remaining)); + } + + return 0; + +failed: + return -1; +} + +static bool mapping_switch(const char *ldb_path) +{ + static TALLOC_CTX *ltdb; + TALLOC_CTX *frame; + char *new_path; + int ret; + + frame = talloc_stackframe(); + + ltdb = tdb_open_log(ldb_path, 0, TDB_DEFAULT, O_RDONLY, 0600); + if (ltdb == NULL) goto failed; + + /* ldb is just a very fancy tdb, read out raw data and perform + * conversion */ + ret = tdb_traverse(ltdb, convert_ldb_record, NULL); + if (ret == -1) goto failed; + + if (ltdb) { + tdb_close(ltdb); + ltdb = NULL; + } + + /* now rename the old db out of the way */ + new_path = state_path("group_mapping.ldb.replaced"); + if (!new_path) { + goto failed; + } + if (rename(ldb_path, new_path) != 0) { + DEBUG(0,("Failed to rename old group mapping database\n")); + goto failed; + } + TALLOC_FREE(frame); + return True; + +failed: + DEBUG(0,("Failed to swith to tdb group mapping database\n")); + if (ltdb) tdb_close(ltdb); + TALLOC_FREE(frame); + return False; +} + static const struct mapping_backend tdb_backend = { .add_mapping_entry = add_mapping_entry, .get_group_map_from_sid = get_group_map_from_sid, |