From 9e8d603d14561095fb8d08871319a315d3bf6763 Mon Sep 17 00:00:00 2001 From: Dimitri Staessens Date: Fri, 2 Aug 2019 19:12:34 +0200 Subject: lib: Add per-message encryption with OpenSSL This adds a per-message symmetric encryption using the OpenSSL library. At flow allocation, an Elliptic Curve Diffie-Hellman exchange is performed to derive a shared secret, which is then hashed using SHA3-256 to be used as a key for symmetric AES-256 encryption. Each message on an encrypted flow adds a small crypto header that includes a random 128-bit Initialization Vector (IV). If the server does not have OpenSSL enabled, the flow allocation will fail with an -ECRYPT error. Future optimizations are to piggyback the public keys on the flow allocation message, and to enable per-flow encryption that maintains the context of the encryption over multiple packets and doesn't require sending IVs. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders --- include/ouroboros/sockets.h.in | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/ouroboros/sockets.h.in') diff --git a/include/ouroboros/sockets.h.in b/include/ouroboros/sockets.h.in index 1e9dc9ca..4f03ca46 100644 --- a/include/ouroboros/sockets.h.in +++ b/include/ouroboros/sockets.h.in @@ -60,8 +60,8 @@ irm_msg_t * send_recv_irm_msg(irm_msg_t * msg); /* qos message conversion needed in different components */ -qosspec_msg_t spec_to_msg(qosspec_t * qs); +qosspec_msg_t spec_to_msg(const qosspec_t * qs); -qosspec_t msg_to_spec(qosspec_msg_t * msg); +qosspec_t msg_to_spec(const qosspec_msg_t * msg); #endif -- cgit v1.2.3