sample code about crypto_api

[KizzyCode]

Hey, this crate only defines an API. For a concrete implementation you can take a look at crypto_api_chachapoly for example. There you'd create a new AEAD instance using ChachaPolyIetf::aead_chipher().

Then you could seal some data using AeadCipher::seal_to; e.g.:

// Get our key and nonce from somewhere
let key: &[u8] = unimplemented!("Some 32 byte key");
let nonce: &[u8] = unimplemented!("Some 12 byte nonce");

// Get our plaintext and additional data from somewhere
let plaintext: &[u8] = unimplemented!("Our plaintext");
let ad: &[u8] = unimplemented!("Our additional data");

// Create target buffer and seal the data
let mut buf = vec![0; plaintext.len() + 16]; // +16 bytes are necessary to hold the authentication tag
ChachaPolyIetf::aead_chipher().seal_to(&mut buf, plaintext, ad, key, nonce)?;