[Openvpn-devel,v2,4/9] Make waiting on auth an explicit state in the context state machine

Message ID 20210520151148.2565578-4-arne@rfc2549.org
State Superseded
Headers show
Series
  • [Openvpn-devel,v2,1/9] Move auth_token_state from multi to key_state
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Commit Message

Arne Schwabe May 20, 2021, 3:11 p.m.
Previously we relied on checking tls_authentication_status to check
wether to determine if the context auth state is actually valid or not.
This patch eliminates that check by introducing waiting on the
authentication as extra state in the context auth, state machine.

Signed-off-by: Arne Schwabe <arne@rfc2549.org>
---
 src/openvpn/multi.c      | 5 -----
 src/openvpn/ssl.c        | 9 ++++++++-
 src/openvpn/ssl_common.h | 1 +
 3 files changed, 9 insertions(+), 6 deletions(-)

Patch

diff --git a/src/openvpn/multi.c b/src/openvpn/multi.c
index 3f9710134..7cb9e86aa 100644
--- a/src/openvpn/multi.c
+++ b/src/openvpn/multi.c
@@ -2596,11 +2596,6 @@  static const multi_client_connect_handler client_connect_handlers[] = {
 static void
 multi_connection_established(struct multi_context *m, struct multi_instance *mi)
 {
-    if (tls_authentication_status(mi->context.c2.tls_multi) != TLS_AUTHENTICATION_SUCCEEDED)
-    {
-        return;
-    }
-
     /* We are only called for the CAS_PENDING_x states, so we
      * can ignore other states here */
     bool from_deferred = (mi->context.c2.tls_multi->multi_state != CAS_PENDING);
diff --git a/src/openvpn/ssl.c b/src/openvpn/ssl.c
index 9f3f83f16..fd64b8d4e 100644
--- a/src/openvpn/ssl.c
+++ b/src/openvpn/ssl.c
@@ -2810,7 +2810,7 @@  tls_process(struct tls_multi *multi,
                     if (session->opt->mode == MODE_SERVER)
                     {
                         /* On a server we continue with running connect scripts next */
-                        multi->multi_state = CAS_PENDING;
+                        multi->multi_state = CAS_WAITING_AUTH;
                     }
                     else
                     {
@@ -3136,6 +3136,13 @@  tls_multi_process(struct tls_multi *multi,
 
     enum tls_auth_status tas = tls_authentication_status(multi);
 
+    /* If we have successfully authenticated and are still waiting for the authentication to finish
+     * move the state machine for the multi context forward */
+    if (multi->multi_state == CAS_WAITING_AUTH && tas == TLS_AUTHENTICATION_SUCCEEDED)
+    {
+        multi->multi_state = CAS_PENDING;
+    }
+
     /*
      * If lame duck session expires, kill it.
      */
diff --git a/src/openvpn/ssl_common.h b/src/openvpn/ssl_common.h
index 8a65ab984..66700bf68 100644
--- a/src/openvpn/ssl_common.h
+++ b/src/openvpn/ssl_common.h
@@ -511,6 +511,7 @@  struct tls_session
  * connect scripts/plugins */
 enum multi_status {
     CAS_NOT_CONNECTED,
+    CAS_WAITING_AUTH,               /**< TLS connection established but deferred auth not finished */
     CAS_PENDING,
     CAS_PENDING_DEFERRED,
     CAS_PENDING_DEFERRED_PARTIAL,   /**< at least handler succeeded, no result yet*/