From: Sergey Kandaurov <pluknet@nginx.com>
Date: Thu, 22 Jul 2021 12:00:37 +0000 (+0300)
Subject: QUIC: avoid processing 1-RTT with incomplete handshake in OpenSSL.
X-Git-Url: http://git.kaiwu.me/postgresql/log/contrib/postgres_fdw/postgres_fdw.c?a=commitdiff_plain;h=2b5659f350974dc1659c512d5681971c857c2deb;p=nginx.git

QUIC: avoid processing 1-RTT with incomplete handshake in OpenSSL.

OpenSSL is known to provide read keys for an encryption level before the
level is active in TLS, following the old BoringSSL API.  In BoringSSL,
it was then fixed to defer releasing read keys until QUIC may use them.
---

diff --git a/src/event/quic/ngx_event_quic.c b/src/event/quic/ngx_event_quic.c
index 0d61be837..8f57b9f5d 100644
--- a/src/event/quic/ngx_event_quic.c
+++ b/src/event/quic/ngx_event_quic.c
@@ -918,6 +918,20 @@ ngx_quic_process_payload(ngx_connection_t *c, ngx_quic_header_t *pkt)
         return NGX_DECLINED;
     }
 
+#if !defined (OPENSSL_IS_BORINGSSL)
+    /* OpenSSL provides read keys for an application level before it's ready */
+
+    if (pkt->level == ssl_encryption_application
+        && SSL_quic_read_level(c->ssl->connection)
+           < ssl_encryption_application)
+    {
+        ngx_log_error(NGX_LOG_INFO, c->log, 0,
+                      "quic no %s keys ready, ignoring packet",
+                      ngx_quic_level_name(pkt->level));
+        return NGX_DECLINED;
+    }
+#endif
+
     pkt->keys = qc->keys;
     pkt->key_phase = qc->key_phase;
     pkt->plaintext = buf;