diff options
Diffstat (limited to 'source3/groupdb/mapping_tdb.c')
| -rw-r--r-- | source3/groupdb/mapping_tdb.c | 1135 |
1 files changed, 1135 insertions, 0 deletions
diff --git a/source3/groupdb/mapping_tdb.c b/source3/groupdb/mapping_tdb.c new file mode 100644 index 0000000..a39b03d --- /dev/null +++ b/source3/groupdb/mapping_tdb.c @@ -0,0 +1,1135 @@ +/* + * Unix SMB/CIFS implementation. + * RPC Pipe client / server routines + * Copyright (C) Andrew Tridgell 1992-2006, + * Copyright (C) Jean François Micouleau 1998-2001. + * Copyright (C) Volker Lendecke 2006. + * Copyright (C) Gerald Carter 2006. + * + * 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 "system/filesys.h" +#include "passdb.h" +#include "groupdb/mapping.h" +#include "dbwrap/dbwrap.h" +#include "dbwrap/dbwrap_open.h" +#include "util_tdb.h" +#include "../libcli/security/security.h" +#include "groupdb/mapping_tdb.h" +#include "lib/util/smb_strtox.h" + +static struct db_context *db; /* used for driver files */ + +static bool enum_group_mapping(const struct 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 struct dom_sid *sid); + +static bool mapping_switch(const char *ldb_path); + +/**************************************************************************** + Open the group mapping tdb. +****************************************************************************/ +static bool init_group_mapping(void) +{ + char *tdb_path; + char *ldb_path; + + if (db != NULL) { + return true; + } + + tdb_path = state_path(talloc_tos(), "group_mapping.tdb"); + if (tdb_path == NULL) { + return false; + } + db = db_open(NULL, tdb_path, 0, + TDB_DEFAULT, O_RDWR|O_CREAT, 0600, + DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE); + if (db == NULL) { + DEBUG(0, ("Failed to open group mapping database: %s\n", + strerror(errno))); + talloc_free(tdb_path); + return false; + } + + ldb_path = state_path(talloc_tos(), "group_mapping.ldb"); + if (ldb_path == NULL) { + talloc_free(tdb_path); + return false; + } + if (file_exist(ldb_path) && !mapping_switch(ldb_path)) { + unlink(tdb_path); + talloc_free(tdb_path); + talloc_free(ldb_path); + 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; + size_t num_entries = 0; + + /* 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 everything in the db */ + + if (vers_id != DATABASE_VERSION_V2) { + tdb_wipe_all(tdb); + 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 ); + } +#endif + } + talloc_free(tdb_path); + talloc_free(ldb_path); + return true; +} + +static char *group_mapping_key(TALLOC_CTX *mem_ctx, const struct dom_sid *sid) +{ + struct dom_sid_buf sidstr; + + return talloc_asprintf( + mem_ctx, "%s%s", GROUP_PREFIX, dom_sid_str_buf(sid, &sidstr)); +} + +/**************************************************************************** +****************************************************************************/ +static bool add_mapping_entry(GROUP_MAP *map, int flag) +{ + char *key, *buf; + int len; + NTSTATUS status; + + key = group_mapping_key(talloc_tos(), &map->sid); + if (key == NULL) { + return false; + } + + len = tdb_pack(NULL, 0, "ddff", + map->gid, map->sid_name_use, map->nt_name, map->comment); + + buf = talloc_array(key, char, len); + if (!buf) { + TALLOC_FREE(key); + return false; + } + len = tdb_pack((uint8_t *)buf, len, "ddff", map->gid, + map->sid_name_use, map->nt_name, map->comment); + + status = dbwrap_trans_store( + db, string_term_tdb_data(key), + make_tdb_data((uint8_t *)buf, len), TDB_REPLACE); + + TALLOC_FREE(key); + + return NT_STATUS_IS_OK(status); +} + + +/**************************************************************************** + Return the sid and the type of the unix group. +****************************************************************************/ + +static bool get_group_map_from_sid(struct dom_sid sid, GROUP_MAP *map) +{ + TDB_DATA dbuf; + char *key; + int ret = 0; + NTSTATUS status; + fstring nt_name; + fstring comment; + + /* the key is the SID, retrieving is direct */ + + key = group_mapping_key(talloc_tos(), &sid); + if (key == NULL) { + return false; + } + + status = dbwrap_fetch_bystring(db, key, key, &dbuf); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(key); + return false; + } + + ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff", + &map->gid, &map->sid_name_use, + &nt_name, &comment); + + TALLOC_FREE(key); + + if ( ret == -1 ) { + DEBUG(3,("get_group_map_from_sid: tdb_unpack failure\n")); + return false; + } + + sid_copy(&map->sid, &sid); + + map->nt_name = talloc_strdup(map, nt_name); + if (!map->nt_name) { + return false; + } + map->comment = talloc_strdup(map, comment); + if (!map->comment) { + return false; + } + + return true; +} + +static bool dbrec2map(const struct db_record *rec, GROUP_MAP *map) +{ + TDB_DATA key = dbwrap_record_get_key(rec); + TDB_DATA value = dbwrap_record_get_value(rec); + int ret = 0; + fstring nt_name; + fstring comment; + + if ((key.dsize < strlen(GROUP_PREFIX)) + || (strncmp((char *)key.dptr, GROUP_PREFIX, + GROUP_PREFIX_LEN) != 0)) { + return False; + } + + if (!string_to_sid(&map->sid, (const char *)key.dptr + + GROUP_PREFIX_LEN)) { + return False; + } + + ret = tdb_unpack(value.dptr, value.dsize, "ddff", + &map->gid, &map->sid_name_use, + &nt_name, &comment); + + if (ret == -1) { + DEBUG(3, ("dbrec2map: tdb_unpack failure\n")); + return false; + } + + map->nt_name = talloc_strdup(map, nt_name); + if (!map->nt_name) { + return false; + } + map->comment = talloc_strdup(map, comment); + if (!map->comment) { + return false; + } + + return true; +} + +struct find_map_state { + bool found; + const char *name; /* If != NULL, look for name */ + gid_t gid; /* valid iff name == NULL */ + GROUP_MAP *map; +}; + +static int find_map(struct db_record *rec, void *private_data) +{ + struct find_map_state *state = (struct find_map_state *)private_data; + + if (!dbrec2map(rec, state->map)) { + DEBUG(10, ("failed to unpack map\n")); + return 0; + } + + if (state->name != NULL) { + if (strequal(state->name, state->map->nt_name)) { + state->found = true; + return 1; + } + } + else { + if (state->map->gid == state->gid) { + state->found = true; + return 1; + } + } + + return 0; +} + +/**************************************************************************** + Return the sid and the type of the unix group. +****************************************************************************/ + +static bool get_group_map_from_gid(gid_t gid, GROUP_MAP *map) +{ + struct find_map_state state; + + state.found = false; + state.name = NULL; /* Indicate we're looking for gid */ + state.gid = gid; + state.map = map; + + dbwrap_traverse_read(db, find_map, (void *)&state, NULL); + + return state.found; +} + +/**************************************************************************** + Return the sid and the type of the unix group. +****************************************************************************/ + +static bool get_group_map_from_ntname(const char *name, GROUP_MAP *map) +{ + struct find_map_state state; + + state.found = false; + state.name = name; + state.map = map; + + dbwrap_traverse_read(db, find_map, (void *)&state, NULL); + + return state.found; +} + +/**************************************************************************** + Remove a group mapping entry. +****************************************************************************/ + +static bool group_map_remove(const struct dom_sid *sid) +{ + char *key; + NTSTATUS status; + + key = group_mapping_key(talloc_tos(), sid); + if (key == NULL) { + return false; + } + + status = dbwrap_trans_delete(db, string_term_tdb_data(key)); + + TALLOC_FREE(key); + return NT_STATUS_IS_OK(status); +} + +/**************************************************************************** + Enumerate the group mapping. +****************************************************************************/ + +struct enum_map_state { + const struct dom_sid *domsid; + enum lsa_SidType sid_name_use; + bool unix_only; + + size_t num_maps; + GROUP_MAP **maps; +}; + +static int collect_map(struct db_record *rec, void *private_data) +{ + struct enum_map_state *state = (struct enum_map_state *)private_data; + GROUP_MAP *map; + GROUP_MAP **tmp; + + map = talloc_zero(NULL, GROUP_MAP); + if (!map) { + DEBUG(0, ("Unable to allocate group map!\n")); + return 1; + } + + if (!dbrec2map(rec, map)) { + TALLOC_FREE(map); + return 0; + } + /* list only the type or everything if UNKNOWN */ + if (state->sid_name_use != SID_NAME_UNKNOWN + && state->sid_name_use != map->sid_name_use) { + DEBUG(11,("enum_group_mapping: group %s is not of the " + "requested type\n", map->nt_name)); + TALLOC_FREE(map); + return 0; + } + + if ((state->unix_only == ENUM_ONLY_MAPPED) && (map->gid == -1)) { + DEBUG(11,("enum_group_mapping: group %s is non mapped\n", + map->nt_name)); + TALLOC_FREE(map); + return 0; + } + + if ((state->domsid != NULL) && + (dom_sid_compare_domain(state->domsid, &map->sid) != 0)) { + struct dom_sid_buf buf; + DEBUG(11,("enum_group_mapping: group %s is not in domain\n", + dom_sid_str_buf(&map->sid, &buf))); + TALLOC_FREE(map); + return 0; + } + + tmp = talloc_realloc(NULL, state->maps, GROUP_MAP *, + state->num_maps + 1); + if (!tmp) { + DEBUG(0,("enum_group_mapping: Unable to enlarge group " + "map!\n")); + TALLOC_FREE(map); + return 1; + } + + state->maps = tmp; + state->maps[state->num_maps] = talloc_move(state->maps, &map); + state->num_maps++; + return 0; +} + +static bool enum_group_mapping(const struct dom_sid *domsid, + enum lsa_SidType sid_name_use, + GROUP_MAP ***pp_rmap, + size_t *p_num_entries, bool unix_only) +{ + struct enum_map_state state; + NTSTATUS status; + + state.domsid = domsid; + state.sid_name_use = sid_name_use; + state.unix_only = unix_only; + state.num_maps = 0; + state.maps = NULL; + + status = dbwrap_traverse_read(db, collect_map, (void *)&state, NULL); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(state.maps); + return false; + } + + *pp_rmap = state.maps; + *p_num_entries = state.num_maps; + + 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 struct dom_sid *member, + struct dom_sid **sids, size_t *num) +{ + struct dom_sid_buf tmp; + fstring key; + char *string_sid; + TDB_DATA dbuf; + const char *p; + NTSTATUS status; + TALLOC_CTX *frame = talloc_stackframe(); + + slprintf(key, sizeof(key), "%s%s", MEMBEROF_PREFIX, + dom_sid_str_buf(member, &tmp)); + + status = dbwrap_fetch_bystring(db, frame, key, &dbuf); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(frame); + return NT_STATUS_OK; + } + + p = (const char *)dbuf.dptr; + + while (next_token_talloc(frame, &p, &string_sid, " ")) { + struct dom_sid alias; + uint32_t num_sids; + + if (!string_to_sid(&alias, string_sid)) + continue; + + num_sids = *num; + status= add_sid_to_array_unique(NULL, &alias, sids, &num_sids); + if (!NT_STATUS_IS_OK(status)) { + goto done; + } + *num = num_sids; + } + +done: + TALLOC_FREE(frame); + return status; +} + +static NTSTATUS alias_memberships(const struct dom_sid *members, size_t num_members, + struct dom_sid **sids, size_t *num) +{ + size_t i; + + *num = 0; + *sids = NULL; + + for (i=0; i<num_members; i++) { + NTSTATUS status = one_alias_membership(&members[i], sids, num); + if (!NT_STATUS_IS_OK(status)) + return status; + } + return NT_STATUS_OK; +} + +static bool is_aliasmem(const struct dom_sid *alias, const struct dom_sid *member) +{ + struct dom_sid *sids; + size_t i; + size_t 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 (dom_sid_compare(alias, &sids[i]) == 0) { + TALLOC_FREE(sids); + return True; + } + } + TALLOC_FREE(sids); + return False; +} + + +static NTSTATUS add_aliasmem(const struct dom_sid *alias, const struct dom_sid *member) +{ + GROUP_MAP *map; + char *key; + struct dom_sid_buf string_sid; + char *new_memberstring; + struct db_record *rec; + NTSTATUS status; + TDB_DATA value; + + map = talloc_zero(talloc_tos(), GROUP_MAP); + if (!map) { + return NT_STATUS_NO_MEMORY; + } + + if (!get_group_map_from_sid(*alias, map)) { + TALLOC_FREE(map); + return NT_STATUS_NO_SUCH_ALIAS; + } + + if ((map->sid_name_use != SID_NAME_ALIAS) && + (map->sid_name_use != SID_NAME_WKN_GRP)) { + TALLOC_FREE(map); + return NT_STATUS_NO_SUCH_ALIAS; + } + + TALLOC_FREE(map); + + if (is_aliasmem(alias, member)) + return NT_STATUS_MEMBER_IN_ALIAS; + + key = talloc_asprintf(talloc_tos(), "%s%s", MEMBEROF_PREFIX, + dom_sid_str_buf(member, &string_sid)); + if (key == NULL) { + return NT_STATUS_NO_MEMORY; + } + + if (dbwrap_transaction_start(db) != 0) { + DEBUG(0, ("transaction_start failed\n")); + return NT_STATUS_INTERNAL_DB_CORRUPTION; + } + + rec = dbwrap_fetch_locked(db, key, string_term_tdb_data(key)); + + if (rec == NULL) { + DEBUG(10, ("fetch_lock failed\n")); + TALLOC_FREE(key); + status = NT_STATUS_INTERNAL_DB_CORRUPTION; + goto cancel; + } + + value = dbwrap_record_get_value(rec); + + dom_sid_str_buf(alias, &string_sid); + + if (value.dptr != NULL) { + new_memberstring = talloc_asprintf( + key, "%s %s", (char *)(value.dptr), string_sid.buf); + } else { + new_memberstring = talloc_strdup(key, string_sid.buf); + } + + if (new_memberstring == NULL) { + TALLOC_FREE(key); + status = NT_STATUS_NO_MEMORY; + goto cancel; + } + + status = dbwrap_record_store(rec, string_term_tdb_data(new_memberstring), 0); + + TALLOC_FREE(key); + + if (!NT_STATUS_IS_OK(status)) { + DEBUG(10, ("Could not store record: %s\n", nt_errstr(status))); + goto cancel; + } + + if (dbwrap_transaction_commit(db) != 0) { + DEBUG(0, ("transaction_commit failed\n")); + status = NT_STATUS_INTERNAL_DB_CORRUPTION; + return status; + } + + return NT_STATUS_OK; + + cancel: + if (dbwrap_transaction_cancel(db) != 0) { + smb_panic("transaction_cancel failed"); + } + + return status; +} + +struct aliasmem_state { + TALLOC_CTX *mem_ctx; + const struct dom_sid *alias; + struct dom_sid **sids; + size_t *num; +}; + +static int collect_aliasmem(struct db_record *rec, void *priv) +{ + struct aliasmem_state *state = (struct aliasmem_state *)priv; + const char *p; + char *alias_string; + TALLOC_CTX *frame; + TDB_DATA key = dbwrap_record_get_key(rec); + TDB_DATA value = dbwrap_record_get_value(rec); + + if (strncmp((const char *)key.dptr, MEMBEROF_PREFIX, + MEMBEROF_PREFIX_LEN) != 0) + return 0; + + p = (const char *)value.dptr; + + frame = talloc_stackframe(); + + while (next_token_talloc(frame, &p, &alias_string, " ")) { + struct dom_sid alias, member; + const char *member_string; + uint32_t num_sids; + + if (!string_to_sid(&alias, alias_string)) + continue; + + if (dom_sid_compare(state->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((const char *)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; + + num_sids = *state->num; + if (!NT_STATUS_IS_OK(add_sid_to_array(state->mem_ctx, &member, + state->sids, + &num_sids))) + { + /* talloc fail. */ + break; + } + *state->num = num_sids; + } + + TALLOC_FREE(frame); + return 0; +} + +static NTSTATUS enum_aliasmem(const struct dom_sid *alias, TALLOC_CTX *mem_ctx, + struct dom_sid **sids, size_t *num) +{ + GROUP_MAP *map; + struct aliasmem_state state; + + map = talloc_zero(talloc_tos(), GROUP_MAP); + if (!map) { + return NT_STATUS_NO_MEMORY; + } + + if (!get_group_map_from_sid(*alias, map)) { + TALLOC_FREE(map); + return NT_STATUS_NO_SUCH_ALIAS; + } + + if ((map->sid_name_use != SID_NAME_ALIAS) && + (map->sid_name_use != SID_NAME_WKN_GRP)) { + TALLOC_FREE(map); + return NT_STATUS_NO_SUCH_ALIAS; + } + + TALLOC_FREE(map); + + *sids = NULL; + *num = 0; + + state.alias = alias; + state.sids = sids; + state.num = num; + state.mem_ctx = mem_ctx; + + dbwrap_traverse_read(db, collect_aliasmem, &state, NULL); + return NT_STATUS_OK; +} + +static NTSTATUS del_aliasmem(const struct dom_sid *alias, const struct dom_sid *member) +{ + NTSTATUS status; + struct dom_sid *sids; + size_t i, num; + bool found = False; + char *member_string; + char *key; + struct dom_sid_buf sid_string; + + if (dbwrap_transaction_start(db) != 0) { + DEBUG(0, ("transaction_start failed\n")); + return NT_STATUS_INTERNAL_DB_CORRUPTION; + } + + status = alias_memberships(member, 1, &sids, &num); + + if (!NT_STATUS_IS_OK(status)) { + goto cancel; + } + + for (i=0; i<num; i++) { + if (dom_sid_compare(&sids[i], alias) == 0) { + found = True; + break; + } + } + + if (!found) { + TALLOC_FREE(sids); + status = NT_STATUS_MEMBER_NOT_IN_ALIAS; + goto cancel; + } + + if (i < num) + sids[i] = sids[num-1]; + + num -= 1; + + key = talloc_asprintf( + sids, + "%s%s", + MEMBEROF_PREFIX, + dom_sid_str_buf(member, &sid_string)); + if (key == NULL) { + TALLOC_FREE(sids); + status = NT_STATUS_NO_MEMORY; + goto cancel; + } + + if (num == 0) { + status = dbwrap_delete_bystring(db, key); + goto commit; + } + + member_string = talloc_strdup(sids, ""); + if (member_string == NULL) { + TALLOC_FREE(sids); + status = NT_STATUS_NO_MEMORY; + goto cancel; + } + + for (i=0; i<num; i++) { + + member_string = talloc_asprintf_append_buffer( + member_string, + " %s", + dom_sid_str_buf(&sids[i], &sid_string)); + + if (member_string == NULL) { + TALLOC_FREE(sids); + status = NT_STATUS_NO_MEMORY; + goto cancel; + } + } + + status = dbwrap_store_bystring( + db, key, string_term_tdb_data(member_string), 0); + commit: + TALLOC_FREE(sids); + + if (!NT_STATUS_IS_OK(status)) { + DEBUG(10, ("dbwrap_store_bystring failed: %s\n", + nt_errstr(status))); + goto cancel; + } + + if (dbwrap_transaction_commit(db) != 0) { + DEBUG(0, ("transaction_commit failed\n")); + status = NT_STATUS_INTERNAL_DB_CORRUPTION; + return status; + } + + return NT_STATUS_OK; + + cancel: + if (dbwrap_transaction_cancel(db) != 0) { + smb_panic("transaction_cancel failed"); + } + 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 = NULL; + uint8_t *p; + uint32_t format; + uint32_t num_el; + unsigned int remaining; + unsigned int i, j; + size_t len; + char *name; + char *val; + uint32_t num_mem = 0; + struct dom_sid *members = NULL; + int error = 0; + + 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; + } + + map = talloc_zero(NULL, GROUP_MAP); + if (!map) { + errno = ENOMEM; + goto failed; + } + + 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_m(name, "member") == 0) { + num_mem = num_vals; + members = talloc_array(tmp_ctx, struct 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_m(name, "gidNumber") == 0) { + map->gid = smb_strtoul(val, + NULL, + 10, + &error, + SMB_STR_FULL_STR_CONV); + if (error != 0) { + errno = EIO; + goto failed; + } + } else if (strcasecmp_m(name, "sid") == 0) { + if (!string_to_sid(&map->sid, val)) { + errno = EIO; + goto failed; + } + } else if (strcasecmp_m(name, "sidNameUse") == 0) { + map->sid_name_use = + smb_strtoul(val, + NULL, + 10, + &error, + SMB_STR_FULL_STR_CONV); + if (error != 0) { + errno = EIO; + goto failed; + } + } else if (strcasecmp_m(name, "ntname") == 0) { + map->nt_name = talloc_strdup(map, val); + if (!map->nt_name) { + errno = ENOMEM; + goto failed; + } + } else if (strcasecmp_m(name, "comment") == 0) { + map->comment = talloc_strdup(map, val); + if (!map->comment) { + errno = ENOMEM; + goto failed; + } + } else if (strcasecmp_m(name, "member") == 0) { + if (!string_to_sid(&members[j], val)) { + errno = EIO; + goto failed; + } + } + + TALLOC_FREE(val); + } + + TALLOC_FREE(name); + } + + if (map->nt_name == NULL) { + errno = EIO; + goto failed; + } + + if (map->comment == NULL) { + map->comment = talloc_strdup(map, ""); + } + if (map->comment == NULL) { + errno = ENOMEM; + goto failed; + } + + 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, ("Error: %d bytes unread in ltdb_unpack_data\n", + remaining)); + } + + TALLOC_FREE(map); + return 0; + +failed: + TALLOC_FREE(map); + return -1; +} + +static bool mapping_switch(const char *ldb_path) +{ + TDB_CONTEXT *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 < 0) goto failed; + + if (ltdb) { + tdb_close(ltdb); + ltdb = NULL; + } + + /* now rename the old db out of the way */ + new_path = state_path(talloc_tos(), "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 switch 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, + .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 tdb mapping backend + */ +const struct mapping_backend *groupdb_tdb_init(void) +{ + if (!init_group_mapping()) { + DEBUG(0,("Failed to initialise tdb mapping backend\n")); + return NULL; + } + + return &tdb_backend; +} |