From 4d85c2eaad13fb1a929709a9c386d1179d1f4ac1 Mon Sep 17 00:00:00 2001
From: jsing <>
Date: Wed, 15 Dec 2021 17:23:34 +0000
Subject: Provide CBS_get_last_u8().

This will be used in the TLSv1.3 record layer.

From BoringSSL.

ok tb@
---
 src/lib/libssl/bs_cbs.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'src/lib/libssl/bs_cbs.c')

diff --git a/src/lib/libssl/bs_cbs.c b/src/lib/libssl/bs_cbs.c
index ab76b78927..627c609bb9 100644
--- a/src/lib/libssl/bs_cbs.c
+++ b/src/lib/libssl/bs_cbs.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: bs_cbs.c,v 1.21 2021/10/31 06:48:54 jsing Exp $	*/
+/*	$OpenBSD: bs_cbs.c,v 1.22 2021/12/15 17:23:34 jsing Exp $	*/
 /*
  * Copyright (c) 2014, Google Inc.
  *
@@ -190,6 +190,17 @@ CBS_get_u32(CBS *cbs, uint32_t *out)
 	return cbs_get_u(cbs, out, 4);
 }
 
+int
+CBS_get_last_u8(CBS *cbs, uint8_t *out)
+{
+	if (cbs->len == 0)
+		return 0;
+
+	*out = cbs->data[cbs->len - 1];
+	cbs->len--;
+	return 1;
+}
+
 int
 CBS_get_bytes(CBS *cbs, CBS *out, size_t len)
 {
-- 
cgit v1.2.3-55-g6feb