From 8e08e21b64a9ef67a4c40917786536d69d7ec4d3 Mon Sep 17 00:00:00 2001
From: Jakub Hrozek <jhrozek@redhat.com>
Date: Mon, 31 Oct 2016 21:39:57 +0100
Subject: [PATCH 18/39] SYSDB: Augment sysdb_try_to_find_expected_dn to match
search base as well
In cases where the domain name in sssd.conf does not match the AD
domain, our previous matching process wouldn't match. This patch
augments the matching as follows:
- the search base is known to sysdb_try_to_find_expected_dn and is
expected to be non-NULL
- the existing matching is ran first
- during the search base, matching, all the non-DC components are
stripped from the search base to 'canonicalize' the search base
- if only a single entry that matches with a non-DC DN component
(matching with a DC component would mean the DN comes from a
different domain) then this entry is a match and is returned
Resolves:
https://fedorahosted.org/sssd/ticket/3199
Reviewed-by: Sumit Bose <sbose@redhat.com>
(cherry picked from commit 24d8c85fae253f988165c112af208198cf48eef6)
(cherry picked from commit 956fdd727f8d7a28f1456146b3b7dfee49f38626)
---
src/db/sysdb.h | 1 +
src/db/sysdb_subdomains.c | 99 ++++++++++++++++++++++++++++++
src/providers/ldap/sdap_async_initgroups.c | 8 ++-
src/tests/cmocka/test_sysdb_subdomains.c | 43 +++++++++++--
4 files changed, 144 insertions(+), 7 deletions(-)
diff --git a/src/db/sysdb.h b/src/db/sysdb.h
index 901268390..5dedd97dd 100644
--- a/src/db/sysdb.h
+++ b/src/db/sysdb.h
@@ -1297,6 +1297,7 @@ errno_t sysdb_handle_original_uuid(const char *orig_name,
errno_t sysdb_try_to_find_expected_dn(struct sss_domain_info *dom,
const char *domain_component_name,
+ const char *ldap_search_base,
struct sysdb_attrs **usr_attrs,
size_t count,
struct sysdb_attrs **exp_usr);
diff --git a/src/db/sysdb_subdomains.c b/src/db/sysdb_subdomains.c
index b011bad6c..780140484 100644
--- a/src/db/sysdb_subdomains.c
+++ b/src/db/sysdb_subdomains.c
@@ -1320,8 +1320,97 @@ static errno_t match_basedn(TALLOC_CTX *tmp_ctx,
_result);
}
+static errno_t match_search_base(TALLOC_CTX *tmp_ctx,
+ struct sss_domain_info *dom,
+ const char *domain_component_name,
+ const char *domain_search_base,
+ struct sysdb_attrs **usr_attrs,
+ size_t count,
+ struct sysdb_attrs **_result)
+{
+ errno_t ret;
+ bool ok;
+ const char *search_base;
+ struct ldb_context *ldb_ctx;
+ struct sysdb_attrs *result = NULL;
+ struct ldb_dn *ldb_search_base;
+ int search_base_comp_num;
+ int non_dc_comp_num;
+ const char *component_name;
+
+ ldb_ctx = sysdb_ctx_get_ldb(dom->sysdb);
+ if (ldb_ctx == NULL) {
+ DEBUG(SSSDBG_OP_FAILURE, "Missing ldb context.\n");
+ ret = EINVAL;
+ goto done;
+ }
+
+ ldb_search_base = ldb_dn_new(tmp_ctx, ldb_ctx, domain_search_base);
+ if (ldb_search_base == NULL) {
+ DEBUG(SSSDBG_OP_FAILURE, "ldb_dn_new failed.\n");
+ ret = ENOMEM;
+ goto done;
+ }
+
+ /* strip non-DC components from the search base */
+ search_base_comp_num = ldb_dn_get_comp_num(ldb_search_base);
+ for (non_dc_comp_num = 0;
+ non_dc_comp_num < search_base_comp_num;
+ non_dc_comp_num++) {
+
+ component_name = ldb_dn_get_component_name(ldb_search_base,
+ non_dc_comp_num);
+ if (strcasecmp(domain_component_name, component_name) == 0) {
+ break;
+ }
+ }
+
+ if (non_dc_comp_num == search_base_comp_num) {
+ /* The search base does not have any non-DC components, the search wouldn't
+ * match anyway
+ */
+ ret = EOK;
+ *_result = NULL;
+ goto done;
+ }
+
+ ok = ldb_dn_remove_child_components(ldb_search_base, non_dc_comp_num);
+ if (!ok) {
+ ret = EINVAL;
+ goto done;
+ }
+
+ search_base = ldb_dn_get_linearized(ldb_search_base);
+ if (search_base == NULL) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ ret = match_cn_users(tmp_ctx, usr_attrs, count, search_base, &result);
+ if (ret != EOK) {
+ goto done;
+ }
+
+ if (result == NULL) {
+ ret = match_non_dc_comp(tmp_ctx, dom,
+ usr_attrs, count,
+ ldb_search_base, search_base,
+ domain_component_name,
+ &result);
+ if (ret != EOK) {
+ goto done;
+ }
+ }
+
+ ret = EOK;
+ *_result = result;
+done:
+ return ret;
+}
+
errno_t sysdb_try_to_find_expected_dn(struct sss_domain_info *dom,
const char *domain_component_name,
+ const char *domain_search_base,
struct sysdb_attrs **usr_attrs,
size_t count,
struct sysdb_attrs **exp_usr)
@@ -1332,6 +1421,7 @@ errno_t sysdb_try_to_find_expected_dn(struct sss_domain_info *dom,
struct sysdb_attrs *result = NULL;
if (dom == NULL || domain_component_name == NULL
+ || domain_search_base == NULL
|| usr_attrs == NULL || count == 0) {
return EINVAL;
}
@@ -1364,6 +1454,15 @@ errno_t sysdb_try_to_find_expected_dn(struct sss_domain_info *dom,
}
if (result == NULL) {
+ ret = match_search_base(tmp_ctx, dom, domain_component_name,
+ domain_search_base, usr_attrs, count,
+ &result);
+ if (ret != EOK) {
+ goto done;
+ }
+ }
+
+ if (result == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "No matching DN found.\n");
ret = ENOENT;
goto done;
diff --git a/src/providers/ldap/sdap_async_initgroups.c b/src/providers/ldap/sdap_async_initgroups.c
index 45fc007e0..9b505e7fa 100644
--- a/src/providers/ldap/sdap_async_initgroups.c
+++ b/src/providers/ldap/sdap_async_initgroups.c
@@ -2947,7 +2947,13 @@ static void sdap_get_initgr_user(struct tevent_req *subreq)
DEBUG(SSSDBG_OP_FAILURE,
"Expected one user entry and got %zu\n", count);
- ret = sysdb_try_to_find_expected_dn(state->dom, "dc", usr_attrs, count,
+ /* When matching against a search base, it's sufficient to pick only
+ * the first search base because all bases in a single domain would
+ * have the same DC= components
+ */
+ ret = sysdb_try_to_find_expected_dn(state->dom, "dc",
+ state->sdom->search_bases[0]->basedn,
+ usr_attrs, count,
&state->orig_user);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE,
diff --git a/src/tests/cmocka/test_sysdb_subdomains.c b/src/tests/cmocka/test_sysdb_subdomains.c
index c9db56841..52056e043 100644
--- a/src/tests/cmocka/test_sysdb_subdomains.c
+++ b/src/tests/cmocka/test_sysdb_subdomains.c
@@ -520,7 +520,9 @@ static void test_try_to_find_expected_dn(void **state)
int ret;
struct sysdb_attrs *result;
struct sysdb_attrs *usr_attrs[10] = { NULL };
+ struct sysdb_attrs *dom_usr_attrs[10] = { NULL };
struct sss_domain_info *dom;
+ char *dom_basedn;
struct subdom_test_ctx *test_ctx =
talloc_get_type(*state, struct subdom_test_ctx);
@@ -528,6 +530,9 @@ static void test_try_to_find_expected_dn(void **state)
"child2.test_sysdb_subdomains_2", true);
assert_non_null(dom);
+ ret = domain_to_basedn(test_ctx, dom->name, &dom_basedn);
+ assert_int_equal(ret, EOK);
+
usr_attrs[0] = sysdb_new_attrs(test_ctx);
assert_non_null(usr_attrs[0]);
@@ -535,13 +540,13 @@ static void test_try_to_find_expected_dn(void **state)
"uid=user,cn=abc,dc=c2,dc=child2,dc=test_sysdb_subdomains_2");
assert_int_equal(ret, EOK);
- ret = sysdb_try_to_find_expected_dn(NULL, NULL, NULL, 0, NULL);
+ ret = sysdb_try_to_find_expected_dn(NULL, NULL, NULL, NULL, 0, NULL);
assert_int_equal(ret, EINVAL);
- ret = sysdb_try_to_find_expected_dn(dom, "dc", usr_attrs, 1, &result);
+ ret = sysdb_try_to_find_expected_dn(dom, "dc", dom_basedn, usr_attrs, 1, &result);
assert_int_equal(ret, ENOENT);
- ret = sysdb_try_to_find_expected_dn(dom, "xy", usr_attrs, 1, &result);
+ ret = sysdb_try_to_find_expected_dn(dom, "xy", dom_basedn, usr_attrs, 1, &result);
assert_int_equal(ret, EOK);
assert_ptr_equal(result, usr_attrs[0]);
@@ -559,11 +564,11 @@ static void test_try_to_find_expected_dn(void **state)
"uid=user2,cn=abc,dc=c2,dc=child2,dc=test_sysdb_subdomains_2");
assert_int_equal(ret, EOK);
- ret = sysdb_try_to_find_expected_dn(dom, "dc", usr_attrs, 3, &result);
+ ret = sysdb_try_to_find_expected_dn(dom, "dc", dom_basedn, usr_attrs, 3, &result);
assert_int_equal(ret, EOK);
assert_ptr_equal(result, usr_attrs[1]);
- ret = sysdb_try_to_find_expected_dn(dom, "xy", usr_attrs, 3, &result);
+ ret = sysdb_try_to_find_expected_dn(dom, "xy", dom_basedn, usr_attrs, 3, &result);
assert_int_equal(ret, EINVAL);
/* Make sure cn=users match is preferred */
@@ -575,10 +580,36 @@ static void test_try_to_find_expected_dn(void **state)
"uid=user2,cn=abc,cn=users,dc=child2,dc=test_sysdb_subdomains_2");
assert_int_equal(ret, EOK);
- ret = sysdb_try_to_find_expected_dn(dom, "dc", usr_attrs, 3, &result);
+ ret = sysdb_try_to_find_expected_dn(dom, "dc", dom_basedn, usr_attrs, 3, &result);
assert_int_equal(ret, EOK);
assert_ptr_equal(result, usr_attrs[2]);
+ /* test a case where the domain name does not match the basedn */
+ dom->name = discard_const("default");
+ dom_usr_attrs[0] = usr_attrs[0];
+
+ ret = sysdb_try_to_find_expected_dn(dom, "dc", dom_basedn, dom_usr_attrs, 1, &result);
+ assert_int_equal(ret, ENOENT);
+
+ dom_usr_attrs[1] = usr_attrs[1];
+ dom_usr_attrs[2] = usr_attrs[2];
+
+ /* Make sure cn=users match is preferred */
+ ret = sysdb_try_to_find_expected_dn(dom, "dc", dom_basedn, dom_usr_attrs, 3, &result);
+ assert_int_equal(ret, EOK);
+ assert_ptr_equal(result, dom_usr_attrs[2]);
+
+ talloc_free(usr_attrs[2]);
+ usr_attrs[2] = sysdb_new_attrs(test_ctx);
+ assert_non_null(usr_attrs[2]);
+ ret = sysdb_attrs_add_string(usr_attrs[2], SYSDB_ORIG_DN,
+ "uid=user2,cn=abc,dc=c2,dc=child2,dc=test_sysdb_subdomains_2");
+ assert_int_equal(ret, EOK);
+
+ dom_usr_attrs[2] = usr_attrs[2];
+ ret = sysdb_try_to_find_expected_dn(dom, "dc", dom_basedn, dom_usr_attrs, 3, &result);
+ assert_int_equal(ret, EOK);
+ assert_ptr_equal(result, usr_attrs[1]);
talloc_free(usr_attrs[0]);
talloc_free(usr_attrs[1]);
--
2.11.0