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.lock b/Cargo.lock
index f2ea361..81985e0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -723,6 +723,7 @@ dependencies = [
  "aes",
  "blake2",
  "constant_time_eq",
+ "cpufeatures",
  "criterion",
  "hex",
 ]