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From e25e1e9228a6108d8e94f2e99f3004e6cbfc3349 Mon Sep 17 00:00:00 2001
From: Sumit Bose <sbose@redhat.com>
Date: Tue, 12 May 2020 16:55:32 +0200
Subject: [PATCH 19/19] ad: check forest root directly if not present on local
DC
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
If the information about the forest root domain cannot be read from the
local domain-controller it is tried to read it from a DC of the forest
root directly.
Resolves: https://github.com/SSSD/sssd/issues/5151
Reviewed-by: Pavel Březina <pbrezina@redhat.com>
---
src/providers/ad/ad_subdomains.c | 184 +++++++++++++++++++++++++++----
1 file changed, 164 insertions(+), 20 deletions(-)
diff --git a/src/providers/ad/ad_subdomains.c b/src/providers/ad/ad_subdomains.c
index 299aa7391..7c6f51db7 100644
--- a/src/providers/ad/ad_subdomains.c
+++ b/src/providers/ad/ad_subdomains.c
@@ -35,6 +35,10 @@
#include <ndr.h>
#include <ndr/ndr_nbt.h>
+/* Avoid that ldb_val is overwritten by data_blob.h */
+#undef ldb_val
+#include <ldb.h>
+
/* Attributes of AD trusted domains */
#define AD_AT_FLATNAME "flatName"
#define AD_AT_SID "securityIdentifier"
@@ -1258,15 +1262,37 @@ ads_get_dom_id_ctx(struct be_ctx *be_ctx,
struct ad_get_root_domain_state {
struct ad_subdomains_ctx *sd_ctx;
+ struct tevent_context *ev;
struct be_ctx *be_ctx;
struct sdap_idmap_ctx *idmap_ctx;
struct sdap_options *opts;
+ const char *domain;
+ const char *forest;
+ struct sysdb_attrs **reply;
+ size_t reply_count;
struct ad_id_ctx *root_id_ctx;
struct sysdb_attrs *root_domain_attrs;
};
static void ad_get_root_domain_done(struct tevent_req *subreq);
+static void ad_check_root_domain_done(struct tevent_req *subreq);
+static errno_t
+ad_get_root_domain_refresh(struct ad_get_root_domain_state *state);
+
+struct tevent_req *
+ad_check_domain_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct be_ctx *be_ctx,
+ struct ad_id_ctx *ad_id_ctx,
+ const char *dom_name,
+ const char *parent_dom_name);
+errno_t ad_check_domain_recv(TALLOC_CTX *mem_ctx,
+ struct tevent_req *req,
+ char **_flat,
+ char **_id,
+ char **_site,
+ char **_forest);
static struct tevent_req *
ad_get_root_domain_send(TALLOC_CTX *mem_ctx,
@@ -1305,6 +1331,9 @@ ad_get_root_domain_send(TALLOC_CTX *mem_ctx,
state->opts = opts = sd_ctx->sdap_id_ctx->opts;
state->be_ctx = sd_ctx->be_ctx;
state->idmap_ctx = opts->idmap_ctx;
+ state->ev = ev;
+ state->domain = domain;
+ state->forest = forest;
filter = talloc_asprintf(state, FOREST_ROOT_FILTER_FMT, forest);
if (filter == NULL) {
@@ -1340,17 +1369,14 @@ static void ad_get_root_domain_done(struct tevent_req *subreq)
{
struct tevent_req *req;
struct ad_get_root_domain_state *state;
- struct sysdb_attrs **reply;
- struct sss_domain_info *root_domain;
- size_t reply_count;
- bool has_changes;
errno_t ret;
req = tevent_req_callback_data(subreq, struct tevent_req);
state = tevent_req_data(req, struct ad_get_root_domain_state);
- ret = sdap_search_bases_return_first_recv(subreq, state, &reply_count,
- &reply);
+ ret = sdap_search_bases_return_first_recv(subreq, state,
+ &state->reply_count,
+ &state->reply);
talloc_zfree(subreq);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, "Unable to lookup forest root information "
@@ -1358,19 +1384,142 @@ static void ad_get_root_domain_done(struct tevent_req *subreq)
goto done;
}
- if (reply_count == 0) {
- DEBUG(SSSDBG_OP_FAILURE, "No information provided for root domain\n");
- ret = ENOENT;
- goto done;
- } else if (reply_count > 1) {
+ if (state->reply_count == 0) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ "No information provided for root domain, trying directly.\n");
+ subreq = ad_check_domain_send(state, state->ev, state->be_ctx,
+ state->sd_ctx->ad_id_ctx, state->forest,
+ state->domain);
+ if (subreq == NULL) {
+ DEBUG(SSSDBG_OP_FAILURE, "ad_check_domain_send() failed.\n");
+ ret = ENOMEM;
+ goto done;
+ }
+ tevent_req_set_callback(subreq, ad_check_root_domain_done, req);
+ return;
+ } else if (state->reply_count > 1) {
DEBUG(SSSDBG_CRIT_FAILURE, "Multiple results for root domain search, "
"domain list might be incomplete!\n");
ret = ERR_MALFORMED_ENTRY;
goto done;
}
+ ret = ad_get_root_domain_refresh(state);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE, "ad_get_root_domain_refresh() failed.\n");
+ }
+
+done:
+ if (ret != EOK) {
+ tevent_req_error(req, ret);
+ return;
+ }
+
+ tevent_req_done(req);
+}
+
+static void ad_check_root_domain_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req;
+ struct ad_get_root_domain_state *state;
+ errno_t ret;
+ char *flat = NULL;
+ char *id = NULL;
+ enum idmap_error_code err;
+ struct ldb_val id_val;
+
+ req = tevent_req_callback_data(subreq, struct tevent_req);
+ state = tevent_req_data(req, struct ad_get_root_domain_state);
+
+ ret = ad_check_domain_recv(state, subreq, &flat, &id, NULL, NULL);
+ talloc_zfree(subreq);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE, "Unable to check forest root information "
+ "[%d]: %s\n", ret, sss_strerror(ret));
+ goto done;
+ }
+
+ if (flat == NULL) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ "NetBIOS name of forest root not available.\n");
+ ret = EINVAL;
+ goto done;
+ }
+
+ if (id == NULL) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ "Domain SID of forest root not available.\n");
+ ret = EINVAL;
+ goto done;
+ }
+
+ state->reply = talloc_array(state, struct sysdb_attrs *, 1);
+ if (state->reply == NULL) {
+ DEBUG(SSSDBG_OP_FAILURE, "talloc_array() failed.\n");
+ ret = ENOMEM;
+ goto done;
+ }
+
+ state->reply[0] = sysdb_new_attrs(state->reply);
+ if (state->reply[0] == NULL) {
+ DEBUG(SSSDBG_OP_FAILURE, "sysdb_new_attrs() failed.\n");
+ ret = ENOMEM;
+ goto done;
+ }
+
+ ret = sysdb_attrs_add_string(state->reply[0], AD_AT_FLATNAME, flat);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE, "sysdb_attrs_add_string() failed.\n");
+ goto done;
+ }
+
+ ret = sysdb_attrs_add_string(state->reply[0], AD_AT_TRUST_PARTNER,
+ state->forest);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE, "sysdb_attrs_add_string() failed.\n");
+ goto done;
+ }
+
+ err = sss_idmap_sid_to_bin_sid(state->idmap_ctx->map, id,
+ &id_val.data, &id_val.length);
+ if (err != IDMAP_SUCCESS) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ "Could not convert SID: [%s].\n", idmap_error_string(err));
+ ret = EFAULT;
+ goto done;
+ }
+
+ ret = sysdb_attrs_add_val(state->reply[0], AD_AT_SID, &id_val);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE, "sysdb_attrs_add_string() failed.\n");
+ goto done;
+ }
+
+ state->reply_count = 1;
+
+ ret = ad_get_root_domain_refresh(state);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE, "ad_get_root_domain_refresh() failed.\n");
+ }
+
+done:
+ if (ret != EOK) {
+ tevent_req_error(req, ret);
+ return;
+ }
+
+ tevent_req_done(req);
+}
+
+static errno_t
+ad_get_root_domain_refresh(struct ad_get_root_domain_state *state)
+{
+ struct sss_domain_info *root_domain;
+ bool has_changes;
+ errno_t ret;
+
ret = ad_subdomains_refresh(state->be_ctx, state->idmap_ctx, state->opts,
- reply, reply_count, true,
+ state->reply, state->reply_count, true,
&state->sd_ctx->last_refreshed,
&has_changes);
if (ret != EOK) {
@@ -1387,8 +1536,8 @@ static void ad_get_root_domain_done(struct tevent_req *subreq)
}
}
- state->root_domain_attrs = reply[0];
- root_domain = ads_get_root_domain(state->be_ctx, reply[0]);
+ state->root_domain_attrs = state->reply[0];
+ root_domain = ads_get_root_domain(state->be_ctx, state->reply[0]);
if (root_domain == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "Could not find the root domain\n");
ret = EFAULT;
@@ -1407,12 +1556,7 @@ static void ad_get_root_domain_done(struct tevent_req *subreq)
ret = EOK;
done:
- if (ret != EOK) {
- tevent_req_error(req, ret);
- return;
- }
-
- tevent_req_done(req);
+ return ret;
}
static errno_t ad_get_root_domain_recv(TALLOC_CTX *mem_ctx,
--
2.21.3
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