Function crypto_box_easy_afternm 

pub fn crypto_box_easy_afternm(
    ciphertext: &mut [u8],
    message: &[u8],
    nonce: &Nonce,
    key: &Key,
) -> Result<(), Error>

Encrypts a message using a key computed by crypto_box_beforenm.

The result is placed into ciphertext, which must be exactly CRYPTO_BOX_MACBYTES bytes longer than message.

Compatible with libsodium’s crypto_box_easy_afternm.

Errors

Returns an error if message is too long or ciphertext has the wrong length.