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 --- src/lib/qosspec.proto | 1 + 1 file changed, 1 insertion(+) (limited to 'src/lib/qosspec.proto') diff --git a/src/lib/qosspec.proto b/src/lib/qosspec.proto index c9e5a6e6..0cbcd41a 100644 --- a/src/lib/qosspec.proto +++ b/src/lib/qosspec.proto @@ -30,4 +30,5 @@ message qosspec_msg { required uint32 ber = 5; /* Bit error rate, ppb */ required uint32 in_order = 6; /* In-order delivery */ required uint32 max_gap = 7; /* In ms */ + required uint32 cypher_s = 8; /* Crypto strength in bits */ }; -- cgit v1.2.3