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| author | Dimitri Staessens <dimitri@ouroboros.rocks> | 2019-08-02 19:12:34 +0200 |
|---|---|---|
| committer | Sander Vrijders <sander@ouroboros.rocks> | 2019-08-03 12:10:57 +0200 |
| commit | 9e8d603d14561095fb8d08871319a315d3bf6763 (patch) | |
| tree | 7a87c212fcd642a8696145b4246a4fc4cf964e10 /doc | |
| parent | 8a37ffbf8c0776a38f2de18a63e885383960ee68 (diff) | |
| download | ouroboros-9e8d603d14561095fb8d08871319a315d3bf6763.tar.gz ouroboros-9e8d603d14561095fb8d08871319a315d3bf6763.zip | |
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 <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/man/flow_alloc.3 | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/doc/man/flow_alloc.3 b/doc/man/flow_alloc.3 index f4a6cf8d..48923fde 100644 --- a/doc/man/flow_alloc.3 +++ b/doc/man/flow_alloc.3 @@ -94,6 +94,9 @@ Not enough system memory resources available to allocate the flow. .B -ETIMEDOUT Flow allocation timed out. +.B -ECRYPT +The requested encryption is not supported. + .SH ATTRIBUTES For an explanation of the terms used in this section, see \fBattributes\fR(7). |