diff options
Diffstat (limited to 'source3/groupdb/mapping_tdb.c')
| -rw-r--r-- | source3/groupdb/mapping_tdb.c | 279 |
1 files changed, 267 insertions, 12 deletions
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, |