LDAP: Add a new error code for malformed access control filter

https://fedorahosted.org/sssd/ticket/2164

The patch adds a new error code and special cases the new code so that
access is denied and a nicer log message is shown.

4 files changed, 16 insertions, 10 deletions

diff --git a/src/providers/ldap/sdap_access.c b/src/providers/ldap/sdap_access.c
index 91a180764..e361cc33e 100644
--- a/src/providers/ldap/sdap_access.c
+++ b/src/providers/ldap/sdap_access.c
@@ -854,9 +854,15 @@ static void sdap_access_filter_get_access_done(struct tevent_req *subreq)
             }
         } else if (dp_error == DP_ERR_OFFLINE) {
             ret = sdap_access_filter_decide_offline(req);
+        } else if (ret == ERR_INVALID_FILTER) {
+            sss_log(SSS_LOG_ERR,
+                    "Malformed access control filter [%s]\n", state->filter);
+            DEBUG(SSSDBG_CRIT_FAILURE,
+                ("Malformed access control filter [%s]\n", state->filter));
+            ret = ERR_ACCESS_DENIED;
         } else {
             DEBUG(1, ("sdap_get_generic_send() returned error [%d][%s]\n",
-                      ret, strerror(ret)));
+                      ret, sss_strerror(ret)));
         }
 
         goto done;
diff --git a/src/providers/ldap/sdap_async.c b/src/providers/ldap/sdap_async.c
index e905d2dd6..367007bde 100644
--- a/src/providers/ldap/sdap_async.c
+++ b/src/providers/ldap/sdap_async.c
@@ -1306,9 +1306,9 @@ static errno_t sdap_get_generic_ext_step(struct tevent_req *req)
                 sss_log(SSS_LOG_ERR, "LDAP connection error, %s",
                                      sss_ldap_err2string(lret));
             }
-        }
-
-        else {
+        } else if (lret == LDAP_FILTER_ERROR) {
+            ret = ERR_INVALID_FILTER;
+        } else {
             ret = EIO;
         }
         goto done;
@@ -1570,7 +1570,7 @@ static void sdap_get_generic_done(struct tevent_req *subreq)
     talloc_zfree(subreq);
     if (ret) {
         DEBUG(4, ("sdap_get_generic_ext_recv failed [%d]: %s\n",
-                  ret, strerror(ret)));
+                  ret, sss_strerror(ret)));
         tevent_req_error(req, ret);
         return;
     }
@@ -1790,7 +1790,7 @@ static void sdap_x_deref_search_done(struct tevent_req *subreq)
     talloc_zfree(subreq);
     if (ret) {
         DEBUG(4, ("sdap_get_generic_ext_recv failed [%d]: %s\n",
-                  ret, strerror(ret)));
+                  ret, sss_strerror(ret)));
         tevent_req_error(req, ret);
         return;
     }
@@ -2049,7 +2049,7 @@ static void sdap_asq_search_done(struct tevent_req *subreq)
     talloc_zfree(subreq);
     if (ret) {
         DEBUG(4, ("sdap_get_generic_ext_recv failed [%d]: %s\n",
-                  ret, strerror(ret)));
+                  ret, sss_strerror(ret)));
         tevent_req_error(req, ret);
         return;
     }
diff --git a/src/providers/ldap/sdap_async_groups_ad.c b/src/providers/ldap/sdap_async_groups_ad.c
index 9b61c697d..6a8a4fd13 100644
--- a/src/providers/ldap/sdap_async_groups_ad.c
+++ b/src/providers/ldap/sdap_async_groups_ad.c
@@ -183,7 +183,7 @@ sdap_get_ad_match_rule_members_step(struct tevent_req *subreq)
     talloc_zfree(subreq);
     if (ret != EOK) {
         DEBUG(SSSDBG_MINOR_FAILURE,
-              ("LDAP search failed: [%s]\n", strerror(ret)));
+              ("LDAP search failed: [%s]\n", sss_strerror(ret)));
         tevent_req_error(req, ret);
         return;
     }
diff --git a/src/providers/ldap/sdap_async_initgroups_ad.c b/src/providers/ldap/sdap_async_initgroups_ad.c
index a3d3ff462..047ddfe65 100644
--- a/src/providers/ldap/sdap_async_initgroups_ad.c
+++ b/src/providers/ldap/sdap_async_initgroups_ad.c
@@ -208,7 +208,7 @@ sdap_get_ad_match_rule_initgroups_step(struct tevent_req *subreq)
     talloc_zfree(subreq);
     if (ret != EOK) {
         DEBUG(SSSDBG_MINOR_FAILURE,
-              ("LDAP search failed: [%s]\n", strerror(ret)));
+              ("LDAP search failed: [%s]\n", sss_strerror(ret)));
         goto error;
     }
 
@@ -383,7 +383,7 @@ static void sdap_get_ad_tokengroups_done(struct tevent_req *subreq)
     talloc_zfree(subreq);
     if (ret != EOK) {
         DEBUG(SSSDBG_MINOR_FAILURE,
-              ("LDAP search failed: [%s]\n", strerror(ret)));
+              ("LDAP search failed: [%s]\n", sss_strerror(ret)));
         goto done;
     }