diff options
Diffstat (limited to 'source3/winbindd/wb_xids2sids.c')
| -rw-r--r-- | source3/winbindd/wb_xids2sids.c | 422 |
1 files changed, 422 insertions, 0 deletions
diff --git a/source3/winbindd/wb_xids2sids.c b/source3/winbindd/wb_xids2sids.c new file mode 100644 index 0000000..86bd7f9 --- /dev/null +++ b/source3/winbindd/wb_xids2sids.c @@ -0,0 +1,422 @@ +/* + * Unix SMB/CIFS implementation. + * async xids2sids + * Copyright (C) Volker Lendecke 2015 + * + * 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" +#include "../libcli/security/security.h" +#include "idmap_cache.h" +#include "librpc/gen_ndr/ndr_winbind_c.h" +#include "librpc/gen_ndr/ndr_netlogon.h" +#include "passdb/lookup_sid.h" + +struct wb_xids2sids_dom_state { + struct tevent_context *ev; + struct unixid *all_xids; + const bool *cached; + size_t num_all_xids; + struct dom_sid *all_sids; + const struct wb_parent_idmap_config_dom *dom_map; + bool tried_dclookup; + + size_t num_dom_xids; + struct unixid *dom_xids; + struct dom_sid *dom_sids; +}; + +static void wb_xids2sids_dom_done(struct tevent_req *subreq); +static void wb_xids2sids_dom_gotdc(struct tevent_req *subreq); + +static struct tevent_req *wb_xids2sids_dom_send( + TALLOC_CTX *mem_ctx, struct tevent_context *ev, + const struct wb_parent_idmap_config_dom *dom_map, + struct unixid *xids, + const bool *cached, + size_t num_xids, + struct dom_sid *sids) +{ + struct tevent_req *req, *subreq; + struct wb_xids2sids_dom_state *state; + struct dcerpc_binding_handle *child_binding_handle = NULL; + size_t i; + + req = tevent_req_create(mem_ctx, &state, + struct wb_xids2sids_dom_state); + if (req == NULL) { + return NULL; + } + + D_DEBUG("Searching for %zu xid(s) in domain %s.\n", + num_xids, + dom_map->name); + + state->ev = ev; + state->all_xids = xids; + state->cached = cached; + state->num_all_xids = num_xids; + state->all_sids = sids; + state->dom_map = dom_map; + + state->dom_xids = talloc_array(state, struct unixid, num_xids); + if (tevent_req_nomem(state->dom_xids, req)) { + return tevent_req_post(req, ev); + } + state->dom_sids = talloc_array(state, struct dom_sid, num_xids); + if (tevent_req_nomem(state->dom_sids, req)) { + return tevent_req_post(req, ev); + } + + for (i=0; i<num_xids; i++) { + struct unixid id = state->all_xids[i]; + + if ((id.id < dom_map->low_id) || (id.id > dom_map->high_id)) { + /* out of range */ + D_DEBUG("%zu: XID %"PRIu32" is out of range.\n", + i, id.id); + continue; + } + if (state->cached[i]) { + /* already found in cache */ + D_DEBUG("%zu: XID %"PRIu32" is already found in cache.\n", + i, id.id); + continue; + } + if (!is_null_sid(&state->all_sids[i])) { + /* already mapped in a previously asked domain */ + D_DEBUG("%zu: XID %"PRIu32" is already mapped in a previously asked domain.\n", + i, id.id); + continue; + } + D_DEBUG("%zu: XID %"PRIu32" will be looked up via dcerpc_wbint_UnixIDs2Sids_send().\n", + i, id.id); + state->dom_xids[state->num_dom_xids++] = id; + } + + if (state->num_dom_xids == 0) { + tevent_req_done(req); + return tevent_req_post(req, ev); + } + + child_binding_handle = idmap_child_handle(); + subreq = dcerpc_wbint_UnixIDs2Sids_send( + state, ev, child_binding_handle, dom_map->name, dom_map->sid, + state->num_dom_xids, state->dom_xids, state->dom_sids); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, wb_xids2sids_dom_done, req); + return req; +} + +static void wb_xids2sids_dom_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct wb_xids2sids_dom_state *state = tevent_req_data( + req, struct wb_xids2sids_dom_state); + const struct wb_parent_idmap_config_dom *dom_map = state->dom_map; + NTSTATUS status, result; + size_t i; + size_t dom_sid_idx; + + status = dcerpc_wbint_UnixIDs2Sids_recv(subreq, state, &result); + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + + if (NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) && + !state->tried_dclookup) { + + subreq = wb_dsgetdcname_send( + state, state->ev, state->dom_map->name, NULL, NULL, + DS_RETURN_DNS_NAME); + if (tevent_req_nomem(subreq, req)) { + return; + } + tevent_req_set_callback(subreq, wb_xids2sids_dom_gotdc, req); + return; + } + + if (!NT_STATUS_EQUAL(result, NT_STATUS_NONE_MAPPED) && + tevent_req_nterror(req, result)) { + return; + } + + dom_sid_idx = 0; + + D_DEBUG("Processing response for %zu xid(s).\n", state->num_all_xids); + for (i=0; i<state->num_all_xids; i++) { + struct unixid *id = &state->all_xids[i]; + struct dom_sid_buf buf; + + if ((id->id < dom_map->low_id) || (id->id > dom_map->high_id)) { + /* out of range */ + continue; + } + if (state->cached[i]) { + /* already found in cache */ + continue; + } + if (!is_null_sid(&state->all_sids[i])) { + /* already mapped in a previously asked domain */ + continue; + } + + sid_copy(&state->all_sids[i], &state->dom_sids[dom_sid_idx]); + *id = state->dom_xids[dom_sid_idx]; + D_DEBUG("%zu: XID %"PRIu32" mapped to SID %s.\n", + i, + id->id, + dom_sid_str_buf(&state->all_sids[i], &buf)); + + dom_sid_idx += 1; + } + + tevent_req_done(req); +} + +static void wb_xids2sids_dom_gotdc(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct wb_xids2sids_dom_state *state = tevent_req_data( + req, struct wb_xids2sids_dom_state); + struct dcerpc_binding_handle *child_binding_handle = NULL; + struct netr_DsRGetDCNameInfo *dcinfo; + NTSTATUS status; + + status = wb_dsgetdcname_recv(subreq, state, &dcinfo); + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + + state->tried_dclookup = true; + + status = wb_dsgetdcname_gencache_set(state->dom_map->name, dcinfo); + if (tevent_req_nterror(req, status)) { + return; + } + + child_binding_handle = idmap_child_handle(); + subreq = dcerpc_wbint_UnixIDs2Sids_send( + state, state->ev, child_binding_handle, state->dom_map->name, + state->dom_map->sid, state->num_dom_xids, + state->dom_xids, state->dom_sids); + if (tevent_req_nomem(subreq, req)) { + return; + } + tevent_req_set_callback(subreq, wb_xids2sids_dom_done, req); +} + +static NTSTATUS wb_xids2sids_dom_recv(struct tevent_req *req) +{ + return tevent_req_simple_recv_ntstatus(req); +} + +struct wb_xids2sids_state { + struct tevent_context *ev; + struct unixid *xids; + size_t num_xids; + struct dom_sid *sids; + bool *cached; + + size_t dom_idx; + const struct wb_parent_idmap_config *cfg; +}; + +static void wb_xids2sids_idmap_setup_done(struct tevent_req *subreq); +static void wb_xids2sids_done(struct tevent_req *subreq); + +struct tevent_req *wb_xids2sids_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + const struct unixid *xids, + uint32_t num_xids) +{ + struct tevent_req *req, *subreq; + struct wb_xids2sids_state *state; + + req = tevent_req_create(mem_ctx, &state, + struct wb_xids2sids_state); + if (req == NULL) { + return NULL; + } + + D_INFO("WB command xids2sids start.\nLooking up %"PRIu32" XID(s).\n", + num_xids); + + state->ev = ev; + state->num_xids = num_xids; + + state->xids = talloc_array(state, struct unixid, num_xids); + if (tevent_req_nomem(state->xids, req)) { + return tevent_req_post(req, ev); + } + memcpy(state->xids, xids, num_xids * sizeof(struct unixid)); + + state->sids = talloc_zero_array(state, struct dom_sid, num_xids); + if (tevent_req_nomem(state->sids, req)) { + return tevent_req_post(req, ev); + } + + state->cached = talloc_zero_array(state, bool, num_xids); + if (tevent_req_nomem(state->cached, req)) { + return tevent_req_post(req, ev); + } + + if (winbindd_use_idmap_cache()) { + uint32_t i; + + for (i=0; i<num_xids; i++) { + struct dom_sid sid = {0}; + bool ok, expired = true; + + ok = idmap_cache_find_xid2sid( + &xids[i], &sid, &expired); + if (ok && !expired) { + struct dom_sid_buf buf; + DBG_DEBUG("Found %cID in cache: %s\n", + xids[i].type == ID_TYPE_UID?'U':'G', + dom_sid_str_buf(&sid, &buf)); + + sid_copy(&state->sids[i], &sid); + state->cached[i] = true; + } + } + } + + subreq = wb_parent_idmap_setup_send(state, state->ev); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, wb_xids2sids_idmap_setup_done, req); + return req; +} + +static void wb_xids2sids_idmap_setup_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct wb_xids2sids_state *state = tevent_req_data( + req, struct wb_xids2sids_state); + NTSTATUS status; + + status = wb_parent_idmap_setup_recv(subreq, &state->cfg); + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + SMB_ASSERT(state->cfg->num_doms > 0); + + subreq = wb_xids2sids_dom_send( + state, state->ev, + &state->cfg->doms[state->dom_idx], + state->xids, state->cached, state->num_xids, state->sids); + if (tevent_req_nomem(subreq, req)) { + return; + } + tevent_req_set_callback(subreq, wb_xids2sids_done, req); + return; +} + +static void wb_xids2sids_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct wb_xids2sids_state *state = tevent_req_data( + req, struct wb_xids2sids_state); + size_t i; + NTSTATUS status; + + status = wb_xids2sids_dom_recv(subreq); + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + + state->dom_idx += 1; + if (state->dom_idx < state->cfg->num_doms) { + const struct wb_parent_idmap_config_dom *dom_map = + &state->cfg->doms[state->dom_idx]; + + subreq = wb_xids2sids_dom_send(state, + state->ev, + dom_map, + state->xids, + state->cached, + state->num_xids, + state->sids); + if (tevent_req_nomem(subreq, req)) { + return; + } + tevent_req_set_callback(subreq, wb_xids2sids_done, req); + return; + } + + + for (i = 0; i < state->num_xids; i++) { + /* + * Prime the cache after an xid2sid call. It's important that we + * use the xid value returned from the backend for the xid value + * passed to idmap_cache_set_sid2unixid(), not the input to + * wb_xids2sids_send: the input carries what was asked for, + * e.g. a ID_TYPE_UID. The result from the backend something the + * idmap child possibly changed to ID_TYPE_BOTH. + * + * And of course If the value was from the cache don't update + * the cache. + */ + + if (state->cached[i]) { + continue; + } + + idmap_cache_set_sid2unixid(&state->sids[i], &state->xids[i]); + } + + tevent_req_done(req); + return; +} + +NTSTATUS wb_xids2sids_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, + struct dom_sid **sids) +{ + struct wb_xids2sids_state *state = tevent_req_data( + req, struct wb_xids2sids_state); + NTSTATUS status; + size_t i; + + D_INFO("WB command xids2sids end.\n"); + if (tevent_req_is_nterror(req, &status)) { + D_WARNING("wb_sids_to_xids failed: %s\n", nt_errstr(status)); + return status; + } + + *sids = talloc_move(mem_ctx, &state->sids); + if (CHECK_DEBUGLVL(DBGLVL_INFO)) { + for (i = 0; i < state->num_xids; i++) { + struct dom_sid_buf buf; + D_INFO("%zu: XID %"PRIu32" mapped to SID %s\n", + i, + state->xids[i].id, + dom_sid_str_buf(&((*sids)[i]), &buf)); + } + } + return NT_STATUS_OK; +} |