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-rw-r--r--source3/winbindd/wb_xids2sids.c422
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;
+}
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