diff options
Diffstat (limited to 'source3/groupdb/mapping.c')
-rw-r--r-- | source3/groupdb/mapping.c | 649 |
1 files changed, 1 insertions, 648 deletions
diff --git a/source3/groupdb/mapping.c b/source3/groupdb/mapping.c index 1d7934e9bf..ba1a7d1dee 100644 --- a/source3/groupdb/mapping.c +++ b/source3/groupdb/mapping.c @@ -22,116 +22,7 @@ */ #include "includes.h" - -static TDB_CONTEXT *tdb; /* used for driver files */ - -#define DATABASE_VERSION_V1 1 /* native byte format. */ -#define DATABASE_VERSION_V2 2 /* le format. */ - -#define GROUP_PREFIX "UNIXGROUP/" - -/* Alias memberships are stored reverse, as memberships. The performance - * critical operation is to determine the aliases a SID is member of, not - * listing alias members. So we store a list of alias SIDs a SID is member of - * hanging of the member as key. - */ -#define MEMBEROF_PREFIX "MEMBEROF/" - - -static BOOL enum_group_mapping(const DOM_SID *sid, 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); - -/**************************************************************************** - Open the group mapping tdb. -****************************************************************************/ - -static BOOL init_group_mapping(void) -{ - const char *vstring = "INFO/version"; - int32 vers_id; - GROUP_MAP *map_table = NULL; - size_t num_entries = 0; - - if (tdb) - return True; - - tdb = tdb_open_log(lock_path("group_mapping.tdb"), 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600); - if (!tdb) { - DEBUG(0,("Failed to open group mapping database\n")); - return False; - } - - /* handle a Samba upgrade */ - tdb_lock_bystring(tdb, vstring); - - /* Cope with byte-reversed older versions of the db. */ - vers_id = tdb_fetch_int32(tdb, vstring); - if ((vers_id == DATABASE_VERSION_V1) || (IREV(vers_id) == DATABASE_VERSION_V1)) { - /* Written on a bigendian machine with old fetch_int code. Save as le. */ - tdb_store_int32(tdb, vstring, DATABASE_VERSION_V2); - vers_id = DATABASE_VERSION_V2; - } - - /* if its an unknown version we remove everthing in the db */ - - if (vers_id != DATABASE_VERSION_V2) { - tdb_traverse(tdb, tdb_traverse_delete_fn, NULL); - tdb_store_int32(tdb, vstring, DATABASE_VERSION_V2); - } - - tdb_unlock_bystring(tdb, vstring); - - /* cleanup any map entries with a gid == -1 */ - - if ( enum_group_mapping( NULL, SID_NAME_UNKNOWN, &map_table, &num_entries, False ) ) { - int i; - - for ( i=0; i<num_entries; i++ ) { - if ( map_table[i].gid == -1 ) { - group_map_remove( &map_table[i].sid ); - } - } - - SAFE_FREE( map_table ); - } - - - return True; -} - -/**************************************************************************** -****************************************************************************/ -static BOOL add_mapping_entry(GROUP_MAP *map, int flag) -{ - TDB_DATA kbuf, dbuf; - pstring key, buf; - fstring string_sid=""; - int len; - - if(!init_group_mapping()) { - DEBUG(0,("failed to initialize group mapping\n")); - return(False); - } - - sid_to_string(string_sid, &map->sid); - - len = tdb_pack(buf, sizeof(buf), "ddff", - map->gid, map->sid_name_use, map->nt_name, map->comment); - - if (len > sizeof(buf)) - return False; - - slprintf(key, sizeof(key), "%s%s", GROUP_PREFIX, string_sid); - - kbuf.dsize = strlen(key)+1; - kbuf.dptr = key; - dbuf.dsize = len; - dbuf.dptr = buf; - if (tdb_store(tdb, kbuf, dbuf, flag) != 0) return False; - - return True; -} +#include "groupdb/mapping.h" /**************************************************************************** initialise first time the mapping list @@ -216,327 +107,11 @@ NTSTATUS map_unix_group(const struct group *grp, GROUP_MAP *pmap) return status; } -/**************************************************************************** - Return the sid and the type of the unix group. -****************************************************************************/ - -static BOOL get_group_map_from_sid(DOM_SID sid, GROUP_MAP *map) -{ - TDB_DATA kbuf, dbuf; - pstring key; - fstring string_sid; - int ret = 0; - - if(!init_group_mapping()) { - DEBUG(0,("failed to initialize group mapping\n")); - return(False); - } - - /* the key is the SID, retrieving is direct */ - - sid_to_string(string_sid, &sid); - slprintf(key, sizeof(key), "%s%s", GROUP_PREFIX, string_sid); - - kbuf.dptr = key; - kbuf.dsize = strlen(key)+1; - - dbuf = tdb_fetch(tdb, kbuf); - if (!dbuf.dptr) - return False; - - ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff", - &map->gid, &map->sid_name_use, &map->nt_name, &map->comment); - - SAFE_FREE(dbuf.dptr); - - if ( ret == -1 ) { - DEBUG(3,("get_group_map_from_sid: tdb_unpack failure\n")); - return False; - } - - sid_copy(&map->sid, &sid); - - return True; -} - -/**************************************************************************** - Return the sid and the type of the unix group. -****************************************************************************/ - -static BOOL get_group_map_from_gid(gid_t gid, GROUP_MAP *map) -{ - TDB_DATA kbuf, dbuf, newkey; - fstring string_sid; - int ret; - - if(!init_group_mapping()) { - DEBUG(0,("failed to initialize group mapping\n")); - return(False); - } - - /* we need to enumerate the TDB to find the GID */ - - for (kbuf = tdb_firstkey(tdb); - kbuf.dptr; - newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) { - - if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0) continue; - - dbuf = tdb_fetch(tdb, kbuf); - if (!dbuf.dptr) - continue; - - fstrcpy(string_sid, kbuf.dptr+strlen(GROUP_PREFIX)); - - string_to_sid(&map->sid, string_sid); - - ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff", - &map->gid, &map->sid_name_use, &map->nt_name, &map->comment); - - SAFE_FREE(dbuf.dptr); - - if ( ret == -1 ) { - DEBUG(3,("get_group_map_from_gid: tdb_unpack failure\n")); - return False; - } - - if (gid==map->gid) { - SAFE_FREE(kbuf.dptr); - return True; - } - } - - return False; -} - -/**************************************************************************** - Return the sid and the type of the unix group. -****************************************************************************/ - -static BOOL get_group_map_from_ntname(const char *name, GROUP_MAP *map) -{ - TDB_DATA kbuf, dbuf, newkey; - fstring string_sid; - int ret; - - if(!init_group_mapping()) { - DEBUG(0,("get_group_map_from_ntname:failed to initialize group mapping\n")); - return(False); - } - - /* we need to enumerate the TDB to find the name */ - for (kbuf = tdb_firstkey(tdb); - kbuf.dptr; - newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) { - if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0) continue; - - dbuf = tdb_fetch(tdb, kbuf); - if (!dbuf.dptr) - continue; - fstrcpy(string_sid, kbuf.dptr+strlen(GROUP_PREFIX)); - string_to_sid(&map->sid, string_sid); - - ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff", - &map->gid, &map->sid_name_use, &map->nt_name, &map->comment); - SAFE_FREE(dbuf.dptr); - - if ( ret == -1 ) { - DEBUG(3,("get_group_map_from_ntname: tdb_unpack failure\n")); - return False; - } - - if ( strequal(name, map->nt_name) ) { - SAFE_FREE(kbuf.dptr); - return True; - } - } - - return False; -} - -/**************************************************************************** - Remove a group mapping entry. -****************************************************************************/ - -static BOOL group_map_remove(const DOM_SID *sid) -{ - TDB_DATA kbuf, dbuf; - pstring key; - fstring string_sid; - - if(!init_group_mapping()) { - DEBUG(0,("failed to initialize group mapping\n")); - return(False); - } - - /* the key is the SID, retrieving is direct */ - - sid_to_string(string_sid, sid); - slprintf(key, sizeof(key), "%s%s", GROUP_PREFIX, string_sid); - - kbuf.dptr = key; - kbuf.dsize = strlen(key)+1; - - dbuf = tdb_fetch(tdb, kbuf); - if (!dbuf.dptr) - return False; - - SAFE_FREE(dbuf.dptr); - - if(tdb_delete(tdb, kbuf) != TDB_SUCCESS) - return False; - - return True; -} - -/**************************************************************************** - Enumerate the group mapping. -****************************************************************************/ - -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) -{ - TDB_DATA kbuf, dbuf, newkey; - fstring string_sid; - GROUP_MAP map; - GROUP_MAP *mapt; - int ret; - size_t entries=0; - DOM_SID grpsid; - uint32 rid; - - if(!init_group_mapping()) { - DEBUG(0,("failed to initialize group mapping\n")); - return(False); - } - - *p_num_entries=0; - *pp_rmap=NULL; - - for (kbuf = tdb_firstkey(tdb); - kbuf.dptr; - newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) { - - if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0) - continue; - - dbuf = tdb_fetch(tdb, kbuf); - if (!dbuf.dptr) - continue; - - fstrcpy(string_sid, kbuf.dptr+strlen(GROUP_PREFIX)); - - ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff", - &map.gid, &map.sid_name_use, &map.nt_name, &map.comment); - - SAFE_FREE(dbuf.dptr); - - if ( ret == -1 ) { - DEBUG(3,("enum_group_mapping: tdb_unpack failure\n")); - continue; - } - - /* list only the type or everything if UNKNOWN */ - if (sid_name_use!=SID_NAME_UNKNOWN && sid_name_use!=map.sid_name_use) { - DEBUG(11,("enum_group_mapping: group %s is not of the requested type\n", map.nt_name)); - continue; - } - - if (unix_only==ENUM_ONLY_MAPPED && map.gid==-1) { - DEBUG(11,("enum_group_mapping: group %s is non mapped\n", map.nt_name)); - continue; - } - - string_to_sid(&grpsid, string_sid); - sid_copy( &map.sid, &grpsid ); - - sid_split_rid( &grpsid, &rid ); - - /* Only check the domain if we were given one */ - - if ( domsid && !sid_equal( domsid, &grpsid ) ) { - DEBUG(11,("enum_group_mapping: group %s is not in domain %s\n", - string_sid, sid_string_static(domsid))); - continue; - } - - DEBUG(11,("enum_group_mapping: returning group %s of " - "type %s\n", map.nt_name, - sid_type_lookup(map.sid_name_use))); - - (*pp_rmap) = SMB_REALLOC_ARRAY((*pp_rmap), GROUP_MAP, entries+1); - if (!(*pp_rmap)) { - DEBUG(0,("enum_group_mapping: Unable to enlarge group map!\n")); - return False; - } - - mapt = (*pp_rmap); - - mapt[entries].gid = map.gid; - sid_copy( &mapt[entries].sid, &map.sid); - mapt[entries].sid_name_use = map.sid_name_use; - fstrcpy(mapt[entries].nt_name, map.nt_name); - fstrcpy(mapt[entries].comment, map.comment); - - entries++; - - } - - *p_num_entries=entries; - - return True; -} - -/* 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) -{ - fstring key, string_sid; - TDB_DATA kbuf, dbuf; - const char *p; - - if (!init_group_mapping()) { - DEBUG(0,("failed to initialize group mapping\n")); - return NT_STATUS_ACCESS_DENIED; - } - - sid_to_string(string_sid, member); - slprintf(key, sizeof(key), "%s%s", MEMBEROF_PREFIX, string_sid); - - kbuf.dsize = strlen(key)+1; - kbuf.dptr = key; - - dbuf = tdb_fetch(tdb, kbuf); - - if (dbuf.dptr == NULL) { - return NT_STATUS_OK; - } - - p = dbuf.dptr; - - while (next_token(&p, string_sid, " ", sizeof(string_sid))) { - - DOM_SID alias; - - if (!string_to_sid(&alias, string_sid)) - continue; - - add_sid_to_array_unique(NULL, &alias, sids, num); - - if (sids == NULL) - return NT_STATUS_NO_MEMORY; - } - - SAFE_FREE(dbuf.dptr); - return NT_STATUS_OK; -} static NTSTATUS alias_memberships(const DOM_SID *members, size_t num_members, DOM_SID **sids, size_t *num) @@ -554,235 +129,13 @@ static NTSTATUS alias_memberships(const DOM_SID *members, size_t num_members, return NT_STATUS_OK; } -static BOOL is_aliasmem(const DOM_SID *alias, const DOM_SID *member) -{ - DOM_SID *sids; - size_t i, num; - - /* This feels the wrong way round, but the on-disk data structure - * dictates it this way. */ - if (!NT_STATUS_IS_OK(alias_memberships(member, 1, &sids, &num))) - return False; - - for (i=0; i<num; i++) { - if (sid_compare(alias, &sids[i]) == 0) { - SAFE_FREE(sids); - return True; - } - } - SAFE_FREE(sids); - return False; -} - -static NTSTATUS add_aliasmem(const DOM_SID *alias, const DOM_SID *member) -{ - GROUP_MAP map; - TDB_DATA kbuf, dbuf; - pstring key; - fstring string_sid; - char *new_memberstring; - int result; - - if(!init_group_mapping()) { - DEBUG(0,("failed to initialize group mapping\n")); - return NT_STATUS_ACCESS_DENIED; - } - - if (!get_group_map_from_sid(*alias, &map)) - return NT_STATUS_NO_SUCH_ALIAS; - - if ( (map.sid_name_use != SID_NAME_ALIAS) && - (map.sid_name_use != SID_NAME_WKN_GRP) ) - return NT_STATUS_NO_SUCH_ALIAS; - - if (is_aliasmem(alias, member)) - return NT_STATUS_MEMBER_IN_ALIAS; - - sid_to_string(string_sid, member); - slprintf(key, sizeof(key), "%s%s", MEMBEROF_PREFIX, string_sid); - - kbuf.dsize = strlen(key)+1; - kbuf.dptr = key; - - dbuf = tdb_fetch(tdb, kbuf); - - sid_to_string(string_sid, alias); - - if (dbuf.dptr != NULL) { - asprintf(&new_memberstring, "%s %s", (char *)(dbuf.dptr), - string_sid); - } else { - new_memberstring = SMB_STRDUP(string_sid); - } - - if (new_memberstring == NULL) - return NT_STATUS_NO_MEMORY; - - SAFE_FREE(dbuf.dptr); - dbuf.dsize = strlen(new_memberstring)+1; - dbuf.dptr = new_memberstring; - - result = tdb_store(tdb, kbuf, dbuf, 0); - - SAFE_FREE(new_memberstring); - - return (result == 0 ? NT_STATUS_OK : NT_STATUS_ACCESS_DENIED); -} - struct aliasmem_closure { const DOM_SID *alias; DOM_SID **sids; size_t *num; }; -static int collect_aliasmem(TDB_CONTEXT *tdb_ctx, TDB_DATA key, TDB_DATA data, - void *state) -{ - struct aliasmem_closure *closure = (struct aliasmem_closure *)state; - const char *p; - fstring alias_string; - - if (strncmp(key.dptr, MEMBEROF_PREFIX, - strlen(MEMBEROF_PREFIX)) != 0) - return 0; - - p = data.dptr; - - while (next_token(&p, alias_string, " ", sizeof(alias_string))) { - - DOM_SID alias, member; - const char *member_string; - - - if (!string_to_sid(&alias, alias_string)) - continue; - - if (sid_compare(closure->alias, &alias) != 0) - continue; - - /* Ok, we found the alias we're looking for in the membership - * list currently scanned. The key represents the alias - * member. Add that. */ - - member_string = strchr(key.dptr, '/'); - - /* Above we tested for MEMBEROF_PREFIX which includes the - * slash. */ - - SMB_ASSERT(member_string != NULL); - member_string += 1; - - if (!string_to_sid(&member, member_string)) - continue; - - add_sid_to_array(NULL, &member, closure->sids, closure->num); - } - - return 0; -} - -static NTSTATUS enum_aliasmem(const DOM_SID *alias, DOM_SID **sids, size_t *num) -{ - GROUP_MAP map; - struct aliasmem_closure closure; - - if(!init_group_mapping()) { - DEBUG(0,("failed to initialize group mapping\n")); - return NT_STATUS_ACCESS_DENIED; - } - - if (!get_group_map_from_sid(*alias, &map)) - return NT_STATUS_NO_SUCH_ALIAS; - - if ( (map.sid_name_use != SID_NAME_ALIAS) && - (map.sid_name_use != SID_NAME_WKN_GRP) ) - return NT_STATUS_NO_SUCH_ALIAS; - - *sids = NULL; - *num = 0; - - closure.alias = alias; - closure.sids = sids; - closure.num = num; - - tdb_traverse(tdb, collect_aliasmem, &closure); - return NT_STATUS_OK; -} - -static NTSTATUS del_aliasmem(const DOM_SID *alias, const DOM_SID *member) -{ - NTSTATUS result; - DOM_SID *sids; - size_t i, num; - BOOL found = False; - char *member_string; - TDB_DATA kbuf, dbuf; - pstring key; - fstring sid_string; - - result = alias_memberships(member, 1, &sids, &num); - - if (!NT_STATUS_IS_OK(result)) - return result; - - for (i=0; i<num; i++) { - if (sid_compare(&sids[i], alias) == 0) { - found = True; - break; - } - } - if (!found) { - SAFE_FREE(sids); - return NT_STATUS_MEMBER_NOT_IN_ALIAS; - } - - if (i < num) - sids[i] = sids[num-1]; - - num -= 1; - - sid_to_string(sid_string, member); - slprintf(key, sizeof(key), "%s%s", MEMBEROF_PREFIX, sid_string); - - kbuf.dsize = strlen(key)+1; - kbuf.dptr = key; - - if (num == 0) - return tdb_delete(tdb, kbuf) == 0 ? - NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL; - - member_string = SMB_STRDUP(""); - - if (member_string == NULL) { - SAFE_FREE(sids); - return NT_STATUS_NO_MEMORY; - } - - for (i=0; i<num; i++) { - char *s = member_string; - - sid_to_string(sid_string, &sids[i]); - asprintf(&member_string, "%s %s", s, sid_string); - - SAFE_FREE(s); - if (member_string == NULL) { - SAFE_FREE(sids); - return NT_STATUS_NO_MEMORY; - } - } - - dbuf.dsize = strlen(member_string)+1; - dbuf.dptr = member_string; - - result = tdb_store(tdb, kbuf, dbuf, 0) == 0 ? - NT_STATUS_OK : NT_STATUS_ACCESS_DENIED; - - SAFE_FREE(sids); - SAFE_FREE(member_string); - - return result; -} /* * |