Add find_domain_by_id()

Currently domains can only be searched by name in the global domain
list. To make it easier to find the domain for a given SID
find_domain_by_id() which returns a pointer to the domain or subdomain
entry in the global domain list if a matching id was found.

2 files changed, 42 insertions, 0 deletions

diff --git a/src/responder/pac/pacsrv.h b/src/responder/pac/pacsrv.h
index 8cd49284..4d3a3164 100644
--- a/src/responder/pac/pacsrv.h
+++ b/src/responder/pac/pacsrv.h
@@ -125,4 +125,7 @@ errno_t diff_gid_lists(TALLOC_CTX *mem_ctx,
                        struct pac_grp **_add_gid_list,
                        size_t *_del_gid_num,
                        struct grp_info ***_del_gid_list);
+
+struct sss_domain_info *find_domain_by_id(struct sss_domain_info *domains,
+                                          const char *id_str);
 #endif /* __PACSRV_H__ */
diff --git a/src/responder/pac/pacsrv_utils.c b/src/responder/pac/pacsrv_utils.c
index 6e0f4bfa..d79adb1f 100644
--- a/src/responder/pac/pacsrv_utils.c
+++ b/src/responder/pac/pacsrv_utils.c
@@ -71,6 +71,45 @@ errno_t local_sid_to_id(struct local_mapping_ranges *map, struct dom_sid *sid,
     return EOK;
 }
 
+struct sss_domain_info *find_domain_by_id(struct sss_domain_info *domains,
+                                          const char *id_str)
+{
+    struct sss_domain_info *dom;
+    struct sss_domain_info *ret_dom = NULL;
+    size_t c;
+
+    if (id_str == NULL) {
+        DEBUG(SSSDBG_OP_FAILURE, ("Missing domain id.\n"));
+        return NULL;
+    }
+
+    for (dom = domains; dom; dom = dom->next) {
+        if (dom->domain_id == NULL) {
+            continue;
+        }
+
+        if (strcasecmp(dom->domain_id, id_str) == 0) {
+            ret_dom = dom;
+            break;
+        }
+
+        for (c = 0; c < dom->subdomain_count; c++) {
+            if (strcasecmp(dom->subdomains[c]->domain_id, id_str) == 0) {
+                ret_dom = dom->subdomains[c];
+                break;
+            }
+        }
+
+    }
+
+    if (!ret_dom) {
+        DEBUG(SSSDBG_OP_FAILURE, ("No domain with domain ID [%s] found",
+                                  id_str));
+    }
+
+    return ret_dom;
+}
+
 /**
  * Add a new remote domain and the corresponding ID range to the context of
  * the libsss_idmap. Without this it is not possible to find the Posix UID for