Alignement requirements quesiton.

[dpc]

Hi,

AFAIK, AESNI and potentially other primitives require that the encryption blocks are properly aligned. Are alignment requirements described/handled by rust-crypto? How would I go about making a best possible job for plain text, cipher destination, iv and everything else? Do they always have to be "block size" aligned or are there more nuances there?

[burdges]

Interesting. It's unclear to me from the .asm or .c files if or how they handle this, but if so its built into the compiler's handling of the inline assembly for SSE instructions. Appears Rust does not yet offer #[repr(align=16)], so nothing easy one can do from Rust. It's probably worth adding tests to aesni.rs that try badly aligned keys, etc.