Static ring::aead::CHACHA20_POLY1305

pub static CHACHA20_POLY1305: Algorithm = aead::Algorithm{key_len: chacha::KEY_LEN_IN_BYTES,
                init: chacha20_poly1305_init,
                seal: chacha20_poly1305_seal,
                open: chacha20_poly1305_open,}

ChaCha20-Poly1305 as described in RFC 7539.

The keys are 256 bits long and the nonces are 96 bits long.