Support for nonce omission in AES-SIV

[matthew-levan]

https://datatracker.ietf.org/doc/html/rfc5297#section-4

[tarcieri]

This can be accomplished by using the AEAD interface with a fixed nonce, or using aes::siv::Siv (or one of its aliases) which provides access to the raw SIV interface, where you can pass an empty or fixed set of headers.

[matthew-levan]

Thanks @tarcieri that works for me. Is there support for 48-byte keys?

[tarcieri]

Not currently

[matthew-levan]

Not currently

I used this @tarcieri and it works:

use aes::Aes192;
type Aes192Siv = CmacSiv<Aes192>;