From 110d3ed8526197bd866e02199bfeae7569d73d8d Mon Sep 17 00:00:00 2001 From: Dimitri Staessens Date: Sun, 21 Jun 2026 13:35:45 +0200 Subject: irmd: Complete bidirectional flow re-keying Extend re-key delivery beyond the locally-initiated watermark path: Handle peer-initiated re-key requests, allowing one request and one response per flow at a time. The client side wins if both ends try to re-key at the same time. Caches the peer certificate to support cert-less authenticated/signed re-keys. After a rekey, the initiator promotes first (timer) and starts sending under the new key. The responder observes the new key (peer_synced) and then the responder promotes. The responder will self-decide to use the new keys if it exhausted the older set in the case where it never sees the peer (unidirectional flow). Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders --- src/lib/serdes-irm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'src/lib/serdes-irm.c') diff --git a/src/lib/serdes-irm.c b/src/lib/serdes-irm.c index 24bb349f..74ca694c 100644 --- a/src/lib/serdes-irm.c +++ b/src/lib/serdes-irm.c @@ -187,7 +187,8 @@ int flow__irm_result_des(buffer_t * buf, int flow_rekey__irm_result_des(buffer_t * buf, struct crypt_sk * sk, - bool * has_key) + bool * has_key, + bool * initiator) { irm_msg_t * msg; int err; @@ -214,6 +215,7 @@ int flow_rekey__irm_result_des(buffer_t * buf, sk->nid = NID_undef; sk->epoch = msg->has_generation ? (uint8_t) msg->generation : 0; + *initiator = msg->has_rk_initiator && msg->rk_initiator; } irm_msg__free_unpacked(msg, NULL); -- cgit v1.2.3