Set NULL BIOs for QUIC.

When used with QUIC, the SSL BIOs are effectively unused, however we still
currently expect them to exist for status (such as SSL_ERROR_WANT_READ and
SSL_ERROR_WANT_WRITE). Set up NULL BIOs if QUIC is in use.

ok tb@

1 files changed, 14 insertions, 1 deletions

diff --git a/src/lib/libssl/tls13_quic.c b/src/lib/libssl/tls13_quic.c
index 3f814188a7..52e09f03eb 100644
--- a/src/lib/libssl/tls13_quic.c
+++ b/src/lib/libssl/tls13_quic.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: tls13_quic.c,v 1.1 2022/07/24 14:28:16 jsing Exp $ */
+/*      $OpenBSD: tls13_quic.c,v 1.2 2022/07/24 14:31:37 jsing Exp $ */
 /*
  * Copyright (c) 2022 Joel Sing <jsing@openbsd.org>
  *
@@ -127,9 +127,22 @@ static const struct tls13_record_layer_callbacks quic_rl_callbacks = {
 int
 tls13_quic_init(struct tls13_ctx *ctx)
 {
+        BIO *bio;
+
         tls13_record_layer_set_callbacks(ctx->rl, &quic_rl_callbacks, ctx);
 
         ctx->middlebox_compat = 0;
 
+        /*
+         * QUIC does not use BIOs, however we currently expect a BIO to exist
+         * for status handling.
+         */
+        if ((bio = BIO_new(BIO_s_null())) == NULL)
+                return 0;
+
+        BIO_up_ref(bio);
+        SSL_set_bio(ctx->ssl, bio, bio);
+        bio = NULL;
+
         return 1;
 }