Pass a handshake message content CBS to TLSv1.3 receive handlers.

This avoids every receive handler from having to get the handshake message
content itself. Additionally, pull the trailing data check up so that each
receive handler does not have to implement it. This makes the code more
readable and reduces duplication.

ok beck@ tb@

1 files changed, 4 insertions, 1 deletions

diff --git a/src/lib/libssl/tls13_lib.c b/src/lib/libssl/tls13_lib.c
index 73d936ac3f..51a2a383ed 100644
--- a/src/lib/libssl/tls13_lib.c
+++ b/src/lib/libssl/tls13_lib.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: tls13_lib.c,v 1.20 2020/01/22 06:23:00 jsing Exp $ */
+/*      $OpenBSD: tls13_lib.c,v 1.21 2020/01/22 13:10:51 jsing Exp $ */
 /*
  * Copyright (c) 2018, 2019 Joel Sing <jsing@openbsd.org>
  * Copyright (c) 2019 Bob Beck <beck@openbsd.org>
@@ -356,6 +356,9 @@ tls13_legacy_error(SSL *ssl)
         case TLS13_ERR_HRR_FAILED:
                 reason = SSL_R_NO_CIPHERS_AVAILABLE;
                 break;
+        case TLS13_ERR_TRAILING_DATA:
+                reason = SSL_R_EXTRA_DATA_IN_MESSAGE;
+                break;
         }
 
         ERR_put_error(ERR_LIB_SSL, (0xfff), reason, ctx->error.file,