Add accessors to change the buffer in a handshake message.

Needed for doing TLS 1.3 Post Handshake Handshake messages.

ok jsing@

1 files changed, 10 insertions, 1 deletions

diff --git a/src/lib/libssl/tls13_buffer.c b/src/lib/libssl/tls13_buffer.c
index 1b490c8b46..8990327bb6 100644
--- a/src/lib/libssl/tls13_buffer.c
+++ b/src/lib/libssl/tls13_buffer.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: tls13_buffer.c,v 1.1 2019/01/17 06:32:12 jsing Exp $ */
+/* $OpenBSD: tls13_buffer.c,v 1.2 2019/11/20 16:21:20 beck Exp $ */
 /*
  * Copyright (c) 2018, 2019 Joel Sing <jsing@openbsd.org>
  *
@@ -75,6 +75,15 @@ tls13_buffer_resize(struct tls13_buffer *buf, size_t capacity)
         return 1;
 }
 
+int
+tls13_buffer_set_data(struct tls13_buffer *buf, CBS *data)
+{
+        if (!tls13_buffer_resize(buf, CBS_len(data)))
+                return 0;
+        memcpy(buf->data, CBS_data(data), CBS_len(data));
+        return 1;
+}
+
 ssize_t
 tls13_buffer_extend(struct tls13_buffer *buf, size_t len,
     tls13_read_cb read_cb, void *cb_arg)