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[Openvpn-devel,v13] Introduce get_key_by_management_key_id helper function

Message ID 20261102134628.26248-1-gert@greenie.muc.de
State New
Headers
Series [Openvpn-devel,v13] Introduce get_key_by_management_key_id helper function |

Commit Message

Gert Doering Nov. 2, 2026, 1:46 p.m. UTC 
  From: Arne Schwabe <arne@rfc2549.org>

This function allows us to map from a management key id to a key structure
and also allows this function to be reused.

Patch v2: add message when key is not found.
Patch v3: only consider valid keys

Change-Id: I42d8785959c24bf688190965e58b9b98251b8557
Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Razvan Cojocaru <razvanc@mailbox.org>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1856
---

This change was reviewed on Gerrit and approved by at least one
developer. I request to merge it to master.

Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1856
This mail reflects revision 13 of this Change.

Acked-by according to Gerrit (reflected above):
Razvan Cojocaru <razvanc@mailbox.org>
diff mbox series

Patch

diff --git a/src/openvpn/ssl_common.h b/src/openvpn/ssl_common.h
index 579f46c..9a55ead 100644
--- a/src/openvpn/ssl_common.h
+++ b/src/openvpn/ssl_common.h
@@ -764,4 +764,24 @@ 
     return &multi->session[TM_ACTIVE].key[KS_PRIMARY];
 }
 
+#ifdef ENABLE_MANAGEMENT
+/**
+ * Gets the \c key_state object that belongs to the management key id or
+ * return NULL if not found.
+ */
+static inline struct key_state *
+get_key_by_management_key_id(struct tls_multi *multi, unsigned int mda_key_id)
+{
+    for (int i = 0; i < KEY_SCAN_SIZE; ++i)
+    {
+        struct key_state *ks = get_key_scan(multi, i);
+        if (ks->mda_key_id == mda_key_id && ks->state > S_UNDEF)
+        {
+            return ks;
+        }
+    }
+    return NULL;
+}
+#endif
+
 #endif /* SSL_COMMON_H_ */
diff --git a/src/openvpn/ssl_verify.c b/src/openvpn/ssl_verify.c
index 73e3696..077ee2d 100644
--- a/src/openvpn/ssl_verify.c
+++ b/src/openvpn/ssl_verify.c
@@ -1250,22 +1250,24 @@ 
 tls_authenticate_key(struct tls_multi *multi, const unsigned int mda_key_id, const bool auth,
                      const char *client_reason)
 {
-    bool ret = false;
+    struct key_state *ks = NULL;
     if (multi)
     {
-        int i;
         auth_set_client_reason(multi, client_reason);
-        for (i = 0; i < KEY_SCAN_SIZE; ++i)
+        ks = get_key_by_management_key_id(multi, mda_key_id);
+
+        if (ks)
         {
-            struct key_state *ks = get_key_scan(multi, i);
-            if (ks->mda_key_id == mda_key_id)
-            {
-                ks->mda_status = auth ? ACF_SUCCEEDED : ACF_FAILED;
-                ret = true;
-            }
+            ks->mda_status = auth ? ACF_SUCCEEDED : ACF_FAILED;
+        }
+        else
+        {
+            msg(D_TLS_DEBUG_LOW, "%s: no key state found for management key id "
+                                 "%u",
+                __func__, mda_key_id);
         }
     }
-    return ret;
+    return (bool)ks;
 }
 #endif /* ifdef ENABLE_MANAGEMENT */