implement aes4 and aes10 with native instructions

Even though aes::hazmat::cipher_round uses aes-ni instructions under the
hood, simply loading the data (and the keys!) takes a significant amount
of time. Sadly, there's no way that aes exposes that lets you re-use the
"loaded" keys.

By implementing aes4/aes10 directly with _mm_aesenc, we can keep the
keys properly aligned.

We still keep the software backend as fallback, using the software
implementation of the aes crate.

This gives a ~70% speedup.

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 572e0b3..174ea24 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,6 +11,7 @@ repository = "https://codeberg.org/dunj3/zears"
 aes = { version = "0.8.4", features = ["hazmat"] }
 blake2 = "0.10.6"
 constant_time_eq = "0.4.2"
+cpufeatures = "0.2.17"
 
 [dev-dependencies]
 hex = "0.4.3"