TLS1.3 Padding

Add padding callback for application control
Standard block_size callback
Documentation and tests included
Configuration file/s_client/s_srver option

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3130)

1 files changed, 15 insertions, 0 deletions

diff --git a/ssl/packet.c b/ssl/packet.c
index 3479f1fed8..d081f557e7 100644
--- a/ssl/packet.c
+++ b/ssl/packet.c
@@ -350,6 +350,21 @@ int WPACKET_set_max_size(WPACKET *pkt, size_t maxsize)
     return 1;
 }
 
+int WPACKET_memset(WPACKET *pkt, int ch, size_t len)
+{
+    unsigned char *dest;
+
+    if (len == 0)
+        return 1;
+
+    if (!WPACKET_allocate_bytes(pkt, len, &dest))
+        return 0;
+
+    memset(dest, ch, len);
+
+    return 1;
+}
+
 int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)
 {
     unsigned char *dest;