diff options
Diffstat (limited to 'source3/winbindd/idmap_rid.c')
| -rw-r--r-- | source3/winbindd/idmap_rid.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/source3/winbindd/idmap_rid.c b/source3/winbindd/idmap_rid.c new file mode 100644 index 0000000000..9d1898708c --- /dev/null +++ b/source3/winbindd/idmap_rid.c @@ -0,0 +1,251 @@ +/* + * idmap_rid: static map between Active Directory/NT RIDs and RFC 2307 accounts + * Copyright (C) Guenther Deschner, 2004 + * Copyright (C) Sumit Bose, 2004 + * + * 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 "winbindd.h" + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_IDMAP + +struct idmap_rid_context { + const char *domain_name; + uint32_t low_id; + uint32_t high_id; + uint32_t base_rid; +}; + +/****************************************************************************** + compat params can't be used because of the completely different way + we support multiple domains in the new idmap + *****************************************************************************/ + +static NTSTATUS idmap_rid_initialize(struct idmap_domain *dom, + const char *params) +{ + NTSTATUS ret; + struct idmap_rid_context *ctx; + char *config_option = NULL; + const char *range; + uid_t low_uid = 0; + uid_t high_uid = 0; + gid_t low_gid = 0; + gid_t high_gid = 0; + + if ( (ctx = TALLOC_ZERO_P(dom, struct idmap_rid_context)) == NULL ) { + DEBUG(0, ("Out of memory!\n")); + return NT_STATUS_NO_MEMORY; + } + + config_option = talloc_asprintf(ctx, "idmap config %s", dom->name); + if ( ! config_option) { + DEBUG(0, ("Out of memory!\n")); + ret = NT_STATUS_NO_MEMORY; + goto failed; + } + + range = lp_parm_const_string(-1, config_option, "range", NULL); + if ( !range || + (sscanf(range, "%u - %u", &ctx->low_id, &ctx->high_id) != 2) || + (ctx->low_id > ctx->high_id)) + { + ctx->low_id = 0; + ctx->high_id = 0; + } + + /* lets see if the range is defined by the old idmap uid/idmap gid */ + if (!ctx->low_id && !ctx->high_id) { + if (lp_idmap_uid(&low_uid, &high_uid)) { + ctx->low_id = low_uid; + ctx->high_id = high_uid; + } + + if (lp_idmap_gid(&low_gid, &high_gid)) { + if ((ctx->low_id != low_gid) || + (ctx->high_id != high_uid)) { + DEBUG(1, ("ERROR: idmap uid range must match idmap gid range\n")); + ret = NT_STATUS_UNSUCCESSFUL; + goto failed; + } + } + } + + if (!ctx->low_id || !ctx->high_id) { + DEBUG(1, ("ERROR: Invalid configuration, ID range missing or invalid\n")); + ret = NT_STATUS_UNSUCCESSFUL; + goto failed; + } + + ctx->base_rid = lp_parm_int(-1, config_option, "base_rid", 0); + ctx->domain_name = talloc_strdup( ctx, dom->name ); + + dom->private_data = ctx; + + talloc_free(config_option); + return NT_STATUS_OK; + +failed: + talloc_free(ctx); + return ret; +} + +static NTSTATUS idmap_rid_id_to_sid(TALLOC_CTX *memctx, struct idmap_rid_context *ctx, struct id_map *map) +{ + struct winbindd_domain *domain; + + /* apply filters before checking */ + if ((map->xid.id < ctx->low_id) || (map->xid.id > ctx->high_id)) { + DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n", + map->xid.id, ctx->low_id, ctx->high_id)); + return NT_STATUS_NONE_MAPPED; + } + + if ( (domain = find_domain_from_name_noinit(ctx->domain_name)) == NULL ) { + return NT_STATUS_NO_SUCH_DOMAIN; + } + + sid_compose(map->sid, &domain->sid, map->xid.id - ctx->low_id + ctx->base_rid); + + /* We **really** should have some way of validating + the SID exists and is the correct type here. But + that is a deficiency in the idmap_rid design. */ + + map->status = ID_MAPPED; + + return NT_STATUS_OK; +} + +/********************************** + Single sid to id lookup function. +**********************************/ + +static NTSTATUS idmap_rid_sid_to_id(TALLOC_CTX *memctx, struct idmap_rid_context *ctx, struct id_map *map) +{ + uint32_t rid; + + sid_peek_rid(map->sid, &rid); + map->xid.id = rid - ctx->base_rid + ctx->low_id; + + /* apply filters before returning result */ + + if ((map->xid.id < ctx->low_id) || (map->xid.id > ctx->high_id)) { + DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n", + map->xid.id, ctx->low_id, ctx->high_id)); + map->status = ID_UNMAPPED; + return NT_STATUS_NONE_MAPPED; + } + + /* We **really** should have some way of validating + the SID exists and is the correct type here. But + that is a deficiency in the idmap_rid design. */ + + map->status = ID_MAPPED; + + return NT_STATUS_OK; +} + +/********************************** + lookup a set of unix ids. +**********************************/ + +static NTSTATUS idmap_rid_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids) +{ + struct idmap_rid_context *ridctx; + TALLOC_CTX *ctx; + NTSTATUS ret; + int i; + + ridctx = talloc_get_type(dom->private_data, struct idmap_rid_context); + + ctx = talloc_new(dom); + if ( ! ctx) { + DEBUG(0, ("Out of memory!\n")); + return NT_STATUS_NO_MEMORY; + } + + for (i = 0; ids[i]; i++) { + + ret = idmap_rid_id_to_sid(ctx, ridctx, ids[i]); + + if (( ! NT_STATUS_IS_OK(ret)) && + ( ! NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) { + /* some fatal error occurred, log it */ + DEBUG(3, ("Unexpected error resolving an ID (%d)\n", ids[i]->xid.id)); + } + } + + talloc_free(ctx); + return NT_STATUS_OK; +} + +/********************************** + lookup a set of sids. +**********************************/ + +static NTSTATUS idmap_rid_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids) +{ + struct idmap_rid_context *ridctx; + TALLOC_CTX *ctx; + NTSTATUS ret; + int i; + + ridctx = talloc_get_type(dom->private_data, struct idmap_rid_context); + + ctx = talloc_new(dom); + if ( ! ctx) { + DEBUG(0, ("Out of memory!\n")); + return NT_STATUS_NO_MEMORY; + } + + for (i = 0; ids[i]; i++) { + + ret = idmap_rid_sid_to_id(ctx, ridctx, ids[i]); + + if (( ! NT_STATUS_IS_OK(ret)) && + ( ! NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) { + /* some fatal error occurred, log it */ + DEBUG(3, ("Unexpected error resolving a SID (%s)\n", + sid_string_dbg(ids[i]->sid))); + } + } + + talloc_free(ctx); + return NT_STATUS_OK; +} + +static NTSTATUS idmap_rid_close(struct idmap_domain *dom) +{ + if (dom->private_data) { + TALLOC_FREE(dom->private_data); + } + return NT_STATUS_OK; +} + +static struct idmap_methods rid_methods = { + .init = idmap_rid_initialize, + .unixids_to_sids = idmap_rid_unixids_to_sids, + .sids_to_unixids = idmap_rid_sids_to_unixids, + .close_fn = idmap_rid_close +}; + +NTSTATUS idmap_rid_init(void) +{ + return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "rid", &rid_methods); +} + |