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authorMatt Caswell <matt@openssl.org>2018-02-01 17:40:17 +0000
committerMatt Caswell <matt@openssl.org>2018-02-02 10:05:47 +0000
commit22da44fce9ca198d9115e2852e6f9a0183e56886 (patch)
tree77486c9af953a7149f77286e7305e89fe0fd3666 /doc
parent03cb2cc9e53f7ca7539069a388d2767fffa7cf66 (diff)
Document SSL_OP_ENABLE_MIDDLEBOX_COMPAT
Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from https://github.com/openssl/openssl/pull/5237)
Diffstat (limited to 'doc')
-rw-r--r--doc/man3/SSL_CTX_set_options.pod9
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/man3/SSL_CTX_set_options.pod b/doc/man3/SSL_CTX_set_options.pod
index ba9a95f3a7..0d510773cd 100644
--- a/doc/man3/SSL_CTX_set_options.pod
+++ b/doc/man3/SSL_CTX_set_options.pod
@@ -189,6 +189,15 @@ those clients (e.g. mobile) use ChaCha20-Poly1305 if that cipher is anywhere
in the server cipher list; but still allows other clients to use AES and other
ciphers. Requires B<SSL_OP_CIPHER_SERVER_PREFERENCE>.
+=item SSL_OP_ENABLE_MIDDLEBOX_COMPAT
+
+If set then dummy Change Cipher Spec (CCS) messages are sent in TLSv1.3. This
+has the effect of making TLSv1.3 look more like TLSv1.2 so that middleboxes that
+do not understand TLSv1.3 will not drop the connection. Regardless of whether
+this option is set or not CCS messages received from the peer will always be
+ignored in TLSv1.3. This option is set by default. To switch it off use
+SSL_clear_options(). A future version of OpenSSL may not set this by default.
+
=back
The following options no longer have any effect but their identifiers are